Search Results — 2000 specimen records retrieved (1484 records with coordinates)
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Results for search: Collector=Howe;   

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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-BC73522  Abies concolor John Thomas Howell; Gordon H. True 1970-6-24 46679 Tulare Sierra Nevada, Kern Plateau - Big Meadow to North Manter Pass on trail to Manter Meadow. 2438 Comment
  GH376139  Abronia maritima J. T. Howell 1932-3-13 8230 Unknown San Nicolas Island Comment
  CAS-BOT-BC383921  Abronia pogonantha John Thomas Howell; Gordon H. True 1967-5-30 42421 Inyo Ninemile Canyon 1432 Comment
  CAS-BOT-BC383947  Abronia pogonantha John Thomas Howell 1930-5-12 4912 Kern 8 miles ne. of Mojave, Mojave Desert 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
  SBBG92153  Abronia villosa D. F. Howe 1980-4-13 Imperial Hwy 8, 9 mi E of Holtville Comment
  CAS-BOT-BC437003  Acaena pinnatifida var. californica John Thomas Howell 1925-4-5 919 Marin Pipeline Trail Comment
  SEINET5707726 Image available Acamptopappus shockleyi D. F. Howe 1980-1 s.n. Inyo 5 miles west of California/Nevada state line on Highway 178. 835 Comment
  CAS-BOT-BC28739  Achillea millefolium John Thomas Howell 1960-7-18 35576 Plumas Drakesbad 1828 Comment
  CAS-BOT-BC30058  Achillea millefolium John Thomas Howell 1942-8-7 17824 Tulare Between Mineral King and Sawtooth Pass Comment
  CAS-BOT-BC260484  Achnatherum hymenoides John Thomas Howell 1951-7-18 27873 Tulare Mineral King and Vicinity. Franklin Pass Trail 2438 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-BC210661  Achnatherum lemmonii John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50644 Lassen South and southeast of Diamond Mt. 2286 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-BC210783  Achnatherum nelsonii John Thomas Howell 1943-7-21 18688 Nevada West side of Donner Pass near Norden 2133 Comment
  CAS-BOT-BC216783  Achnatherum occidentale John Thomas Howell 1958-8-1 34154 Fresno Ridge N of Dougherty Meadow 3048 Comment
  CAS-BOT-BC216917  Achnatherum occidentale John Thomas Howell 1943-7-16 18420 Nevada Boreal Ridge, W side of Donner Pass near Norden 2133 Comment
  CAS-BOT-BC216920  Achnatherum occidentale John Thomas Howell 1939-8-6 15087 Siskiyou Spirit Lake, Marble Mountains 1828 Comment
  CAS-BOT-BC216973  Achnatherum occidentale John Thomas Howell; Gordon H. True 1970-6-24 46695 Tulare N Manter Creek, Big Meadow to Manter Meadow, Kern Plateau 2438 Comment
  CAS-BOT-BC216977  Achnatherum occidentale John Thomas Howell 1950-7-13 26775 Tulare Bakeoven Meadows, South Fork of Kern River 2468 Comment
  CAS-BOT-BC210841  Achnatherum occidentale subsp. californicum John Thomas Howell 1960-7-19 35684 A Plumas Lassen Volcanic National Park. Drakesbad 1828 Comment
  CAS-BOT-BC210931  Achnatherum occidentale subsp. pubescens John Thomas Howell 1955-7-19 30754 Plumas Beckwourth 1493 Comment
  CAS-BOT-BC210948  Achnatherum occidentale subsp. pubescens John Thomas Howell; Gordon H. True 1967-8-9 43641 Tulare Ca. 2.5 miles north of Blackrock Guard Station on Monache Jeep Trail, Kern Plateau 2682 Comment
  CAS-BOT-BC210960  Achnatherum occidentale subsp. pubescens John Thomas Howell; Gordon H. True 1971-7-15 48517 Tulare About 1 mile south of Church Dome, Kern Plateau 2225 Comment
  CAS-BOT-BC210973  Achnatherum occidentale subsp. pubescens John Thomas Howell; Gordon H. True 1970-6-26 46871 Tulare Taylor Meadow, Kern Plateau 2194 Comment
  UCD51193  Achnatherum occidentale subsp. pubescens John Thomas Howell 1943-7-27 18887 El Dorado Silver Fork of American River. 1432 Comment
  RSA299174  Achnatherum speciosum J. T. Howell 1958-5-24 33306 Inyo Whitney Portal road. 1982 Comment
  CAS-BOT-BC418778  Aconogonon phytolaccifolium John Thomas Howell 1960-8-18 36057 Tehama Near Lassen Volcanic National Park. Bluff Falls 1981 Comment
  CAS-BOT-BC29277  Adenocaulon bicolor John Thomas Howell 1943-8-4 19001 Glenn Plaskett Meadows 1828 Comment
  CAS-BOT-BC9075  Aegilops triuncialis John Thomas Howell; Gordon H. True 1971-5-26 47613 Yuba About 8 miles east of Marysville 30 Comment
  CAS-BOT-BC295591  Agnorhiza invenusta John Thomas Howell 1962-7-10 38433 Kern 1.5 mile south of Summit, Greenhorn Mountains 1950 Comment
  CAS-BOT-BC295683  Agnorhiza ovata John Thomas Howell; Gordon H. True 1970-7-29 47105 Tulare On road from Cannell Meadow to Pine Flat, Kern Plateau 2286 Comment
  CAS-BOT-BC29496  Agoseris J. T. Howell 1962-6-16 37565 Butte Magalia 731 Comment
  CAS-BOT-BC15503  Agoseris apargioides John Thomas Howell 1933-5-7 s.n. San Francisco Presidio Comment
  SD81264  Agoseris apargioides var. eastwoodiae Darley F. Howe 1969-5-27 4579 Marin Sandy beach, Point Reyes, north entrance. Comment
  CAS-BOT-BC15397  Agoseris grandiflora var. grandiflora John Thomas Howell 1930-5-30 5200 Solano 1 mile from Vacaville on road to Elmira Comment
  CAS-BOT-BC22948  Agoseris heterophylla John Thomas Howell 1943-5-22 18131 Marin Fairfax hills Comment
  CAS-BOT-BC22957  Agoseris heterophylla John Thomas Howell 1943-5-23 18172 Alameda Hills above Mills College Comment
  CAS-BOT-BC46030  Agoseris heterophylla var. cryptopleura John Thomas Howell 1943-5-11 18012 Lake 1 mile south of Lakeport Comment
  CAS-BOT-BC13153  Agoseris hirsuta John Thomas Howell 1957-5-5 32168 San Francisco East end of 22nd Street Comment
  POM260853  Agoseris hirsuta J. T. Howell 1940-6-30 15592 Lake Soda Bay. Comment
  CAS-BOT-BC13281  Agoseris monticola J. T. Howell; Gordon H. True 1970-7-28 46948 Tulare Kern Plateau. West side of Big Meadow just south of Pipe Spring 2377 Comment
  SD114284  Agrimonia gryposepala Darley F. Howe 1950-7-8 2010 San Diego West slope of Cuyamaca Middle Peak 1524 Comment
  SDSU729  Agropyron trachycaulum D. F. Howe 1941-8-8 1215 Inyo Lone Pine Creek, Sierra Nevadas 3048 Comment
  SEINET10806860  Agrostis John Thomas Howell 1947-4-23 Howell 23062 Marin Drakes Estero west of Mt. Vision, Pt. Reyes Peninsula. Comment
  UC1177041  Agrostis alba John Thomas Howell 1943-7-3 18244 Marin Sausalito Comment
  CAS-BOT-BC127490  Agrostis capillaris John Thomas Howell 1942-7-12 s.n. Marin Cascade Canyon, Mill Valley. Comment
  CAS-BOT-BC126956  Agrostis exarata John Thomas Howell 1955-7-17 30706 Trinity Southwest of Peanut. 762 Comment
  CAS-BOT-BC127003  Agrostis exarata John Thomas Howell 1944-6-11 19598 Santa Cruz 1.5 miles north of Felton. Comment
  CAS-BOT-BC127042  Agrostis exarata John Thomas Howell 1956-9-2 31834 San Francisco San Francisco. Northeast end of Lake Merced. Comment
  CAS-BOT-BC127193  Agrostis exarata John Thomas Howell 1943-6-13 s.n. Marin Sausalito Hills. Comment
  CAS-BOT-BC127211  Agrostis exarata John Thomas Howell 1945-7-29 21342 Marin Bolinas. Comment
  CAS-BOT-BC127237  Agrostis exarata John Thomas Howell; Gordon H. True 1973-7-31 50021 Lassen Sierra Nevada. On road from Janesville to Thompson Peak, Diamond Range. 1737 Comment
  CAS-BOT-BC127271  Agrostis exarata John Thomas Howell; Gordon H. True 1966-7-12 41805 Kern Sierra Nevada. Kern Plateau. Bartolas Country 7.2 miles south of Cherry Hill and Cannell Meadow roads. 2164 Comment
  UCD52435  Agrostis exarata John Thomas Howell 1926-7-26 2126 Plumas near Prattville. 1371 Comment
  UCD52485  Agrostis exarata John Thomas Howell; Gordon H. True 1973-7-31 50087 Plumas Canadian Zone Forest, summit ridge of Thompson Peak, Diamond Range. 2194 Comment
  CAS-BOT-BC139690  Agrostis gigantea John Thomas Howell 1947-8-13 24066 Inyo Big Pine Lakes Trail. 2895 Comment
  CAS-BOT-BC139478  Agrostis hallii John Thomas Howell 1943-6-13 s.n. Marin Sausalito. Comment
  SEINET199904  Agrostis hallii John Howell 1943-7-3 Marin Near Bootjack, Mt. Tamalpais Comment
  CAS-BOT-BC139183  Agrostis idahoensis John Thomas Howell; Gordon H. True 1966-7-11 41723 Tulare Sierra Nevada. Kern Plateau. Horse Meadow. 2255 Comment
  CAS-BOT-BC139310  Agrostis idahoensis John Thomas Howell 1946-7-14 22310 Inyo Rock Creek Lake Basin. Mosquito Flat. 3139 Comment
  UCD52986  Agrostis idahoensis John Thomas Howell 1942-7-26 17220 Tulare Mineral King. Comment
  GH341255  Agrostis microphylla J. T. Howell 1946-5-12 21777 Unknown South end of Carson Ridge, Marin County Comment
  CAS-BOT-BC139140  Agrostis oregonensis John Thomas Howell 1947-7-22 23511 San Bernardino San Bernardino Mountains. South Fork, Santa Ana River. 2377 Comment
  CAS-BOT-BC138895  Agrostis pallens John Thomas Howell 1951-7-17 27841 Tulare Mineral King and Vicinity. White Chief Trail. 2834 Comment
  UC1026508  Agrostis pallens John Thomas Howell 1950-7-14 26846 Tulare Bakeoven Meadows Sierra Nevada, South Fork of Kern River 2468 Comment
  CAS-BOT-BC138762  Agrostis scabra John Thomas Howell 1958-7-22 33771 Fresno Sierra Nevada. Simpson Meadow, Middle Fork of the Kings River. 1828 Comment
  CAS-BOT-BC138608  Agrostis stolonifera John Thomas Howell 1957-8-5 32861 San Francisco San Francisco. In Strybing Arboretum, Golden Gate Park. Comment
  RSA224292  Agrostis stolonifera J. T. Howell 1956-10-28 31931 San Francisco Mountain Lake, Presidio; San Francisco. Comment
  CAS-BOT-BC138535  Agrostis variabilis John Thomas Howell 1947-8-6 23818 Inyo Big Pine Lakes. Fourth Lake. 3291 Comment
  CAS-BOT-BC48025  Ailanthus altissima John Thomas Howell 1959-9-20 34627 Butte Sierra Nevada - Foothills, east of Oroville Comment
  CAS-BOT-BC131911  Allium John Thomas Howell 1955-6-15 30514 Butte West Branch of North Fork of Feather River 182 Comment
  CAS-BOT-BC131933  Allium John Thomas Howell; R. C. Barneby 1954-5-12 29505 Mariposa Near top of Bagby Grade 579 Comment
  CAS-BOT-BC131971  Allium John Thomas Howell; R. C. Barneby 1954-5-8 s.n. Tulare Tule River Valley 8.5 miles above Springville 624 Comment
  SD45796  Allium burlewii Darley F. Howe 1954-5-29 2368 Ventura Mt. Pinos, ridge on north side of Mt. Pinos. 2591 Comment
  SDSU11557  Allium campanulatum D. F. Howe 1964-7-28 3885 Sierra 5.5 miles south of Glod Lake Lodge, Tahoe National Forest 1829 Comment
  CAS-BOT-BC466722  Allium cratericola John Thomas Howell 1962-7-11 38556 Kern Northwest slope of Black Mt. Greenhorn Mountains 2133 Comment
  CAS-BOT-BC469339  Allium fimbriatum var. fimbriatum John Thomas Howell; Gordon H. True 1971-6-15 47716 Kern 0.5 mile south of Bodfish Gap on road to Havilah. 1097 Comment
  SDSU11551  Allium fimbriatum var. mohavense D. F Howe 1947-5-5 1531 Los Angeles North side of San Gabriel Mts., LA. Comment
  SD112445  Allium haematochiton Darley F. Howe 1967-4-6 4328 Santa Barbara Figueroa Mountain. Comment
  CAS-BOT-BC472945  Allium monticola John Thomas Howell 1947-7-18 23387 a Los Angeles Blue Ridge, San Gabriel Mts. 2590 Comment
  CAS-BOT-BC132153  Allium tribracteatum John Thomas Howell 1954-6-5 29934 Tuolumne Near Dardanelle, Middle Fork Stanislaus River 1828 Comment
  CAS-BOT-BC476786  Allium validum John Thomas Howell 1946-7-14 22250 Inyo Mosquito Flat, Rock Creek Lake Basin 3139 Comment
  CAS-BOT-BC478003  Allium validum John Thomas Howell 1949-8-7 26122 Tulare Rock Creek 3169 Comment
  SD113903  Allophyllum gilioides Darley F. Howe 1950-4-28 2055 San Diego South side of Cuyamaca Middle Peak. 1524 Comment
  SD149126  Allophyllum gilioides John Thomas Howell, G. H. True 1967-5-29 42389 Tulare Kern Plateau, slopes west of Lamont Meadow. 1707 Comment
  CAS-BOT-BC171349  Alnus incana subsp. tenuifolia John Thomas Howell 1960-7-17 35501 Plumas Drakesbad, Lassen Volcanic Park 1828 Comment
  CAS-BOT-BC171436  Alnus rhombifolia John Thomas Howell 1925-11-28 1591 Solano Freen Creek near the falls Comment
  SD51348  Alnus rubra Darley F. Howe 1961-7-28 3073 Marin 0.3 miles above Stinson Beach on road to Mount Tamalpais 149 Comment
  SD43609  Alnus tenuifolia Darley F. Howe 1948-5-22 1823 Placer unknown 1705 Comment
  SD50706  Alnus tenuifolia Darley F. Howe 1959-8-3 2785 Plumas 30 miles north of Quincy 1370 Comment
  CAS-BOT-BC138051  Alopecurus aequalis var. sonomensis John Thomas Howell 1945-5-30 20899 Sonoma Pitkin Marsh. Comment
  CAS-BOT-BC138017  Alopecurus geniculatus John Thomas Howell 1948-7-24 24965 Fresno Bullfrog Lake. 3240 Comment
  CAS-BOT-BC138020  Alopecurus geniculatus John Thomas Howell 1964-8-10 40921 Alpine Sierra Nevada. Markleeville. 1676 Comment
  UC905060  Alopecurus geniculatus John Thomas Howell 1949-7-26 25779 Tulare Whitney Meadows Sierra Nevada, Whitney Meadows 2956 Comment
  UCD97069  Amaranthus arenicola John Thomas Howell 1964-10-18 40962 Monterey Road side at southern limit of King City. Comment
  SDSU6267  Ambrosia acanthicarpa D. F. Howe 1976-10-8 4929 Inyo 6.4 miles from entranceto Inyo National Forest east of Big Pine. 1981 Comment
  SD113175  Ambrosia salsola var. salsola Darley F. Howe 1938-4-15 650 San Diego Borrego Valley Comment
  A346785  Amelanchier alnifolia J. T. Howell 1934-6-12 12040 Unknown North side of Fandango Valley Comment
  A346797  Amelanchier alnifolia J. T. Howell 1938-8-2 14010 Unknown Near Brockway Comment
  CAS-BOT-BC142536  Amelanchier utahensis John Thomas Howell 1945-6-20 21083 Lake Sawmill Flat, Bartlett Mountain 1219 Comment
  CAS-BOT-BC142928  Amelanchier utahensis John Thomas Howell 1943-8-12 19296 Glenn Plaskett Meadows 1828 Comment
  A366154  Amorpha californica J. T. Howell 1937-7-20 13149 Unknown 6 miles from Trinity Center on road to French Gulch Comment
  CAS-BOT-BC213998  Amsinckia John Thomas Howell 1933-5-28 11365 Alameda Strawberry Canyon, Berkeley Hills Comment
  GH424835  Amsinckia J. T. Howell 1933-4-22 11017 Unknown 7 miles nw. of Hollister Comment
  CAS-BOT-BC214028  Amsinckia John Thomas Howell 1933-4-22 11061 San Benito Between Paicines and Pinnacles P.O. Comment
  CAS-BOT-BC222253  Amsinckia John Thomas Howell 1934-6-16 12219 Lassen Big Valley, 4 miles ne. of Bieber Comment
  CAS-BOT-BC222283  Amsinckia John Thomas Howell 1934-3-26 11785 Sonoma Southwestern base of Mt. Hood Comment
  CAS-BOT-BC222287  Amsinckia John Thomas Howell 1934-3-25 11776 Sonoma Lakeville Comment
  RSA0090956  Amsinckia eastwoodiae J. T. Howell 1938-4-10 13756 San Joaquin Hospital Canyon. Comment
  SD128708  Amsinckia menziesii Darley F. Howe 1980-5-29 Inyo 1 mile west of Highway 395, 10 miles north of Lone Pine 1220 Comment
  CAS-BOT-BC45100  Anaphalis margaritacea John Thomas Howell 1925-9-22 1479 El Dorado Emerald Bay, Lake Tahoe Comment
  SD113070  Anaphalis margaritacea Darley F. Howe 1939-7-28 943 San Francisco San Francisco Peninsula Comment
  SD112745  Anaphalis margaritacea Darley F. Howe 1962-8-17 3458 Fresno Tamarack Creek, 13 miles east of Shaver Lake on #168, Sierra National Forest 2165 Comment
  CAS-BOT-BC45305  Ancistrocarphus filagineus John Thomas Howell 1937-4-29 4088 Kern Temblor Range, west of McKittrick Comment
  CAS-BOT-BC391869  Anemone grayi John Thomas Howell; Gordon H. True 1970-5-27 46530 El Dorado Blodgett Experimental Forest 1280 Comment
  CAS-BOT-BC391997  Anemone oregana John Thomas Howell 1963-6-3 39396 Plumas Butterfly Valley Comment
  CAS-BOT-BC400389  Anemopsis californica John Thomas Howell; Gordon H. True 1967-9-19 43851 Tulare Flood-plain of Kern River South Fork, Kennedy Meadows Campground, Kern Plateau 1859 Comment
  CAS-BOT-BC64770  Anisocoma acaulis John Thomas Howell; Gordon H. True 1966-7-12 41852 Tulare On Taylor Creek south of Taylor Meadow 2194 Comment
  CAS-BOT-BC59206  Antennaria dimorpha John Thomas Howell 1944-7-13 19754 Glenn North of Black Butte Comment
  RSA584789  Antennaria dimorpha J. T. Howell, Gordon H. True 1970-6-26 46834 Tulare Kern Plateau, at True Meadow 2226 Comment
  CAS-BOT-BC69106  Antennaria media John Thomas Howell 1941-7-30 16536 Madera Near Thousand Island Lake Comment
  CAS-BOT-BC79852  Antennaria microphylla John Thomas Howell 1950-7-22 27215 Tulare Olancha Peak 3657 Comment
  CAS-BOT-BC137703  Anthoxanthum odoratum John Thomas Howell 1956-7-29 31731 San Francisco San Francisco. McLaren Park. Comment
  CAS-BOT-BC137707  Anthoxanthum odoratum John Thomas Howell 1968-6-10 s.n. Plumas Sierra Nevada. Meadow at Quincy. 1036 Comment
  SDSU10501  Antirrhinum multiflorum D. F. Howe 1962-7-21 3332 Santa Barbara 10.6 miles S of Orcutt on #1. 305 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
  SD61027  Apocynum androsaemifolium Darley F. Howe 1964-8-3 3928 Modoc 34 miles north of Alturas on #395. 1402 Comment
  RSA224338  Aptenia cordifolia J. T. Howell 1963-11-19 40409 Monterey Near Russian church in Seaside Comment
  CAS-BOT-BC394978  Aquilegia formosa John Thomas Howell 1939-8-8 15153 Siskiyou Black Mt., Marble Mts. Comment
  CAS-BOT-BC394980  Aquilegia formosa John Thomas Howell 1939-8-10 15278 Siskiyou Sky High Valley, Marble Mts. 1828 Comment
  CAS-BOT-BC395160  Aquilegia formosa John Thomas Howell 1949-8-3 25972 Tulare Rock Creek 3291 Comment
  RSA0126139  Arabis divaricarpa J. T. Howell 1944-8-16 20611 Tuolumne Mono Pass Trail. Comment
  CAS-BOT-BC128663  Arbutus menziesii John Thomas Howell 1930-10-25 5679 Monterey Canyon of the Arroyo Seco River - Santa Lucia Mts. Comment
  RSA201279  Arceuthobium americanum J. T. Howell 1959-9-22 34866 Plumas Lassen Volcanic National Park. On Pinus Murrayana, Drakesbad. 1677 Comment
  SD71013  Arceuthobium americanum John Thomas Howell 1959-9-22 34866 Plumas Drakesbad 1676 Comment
  CAS-BOT-BC407676  Arceuthobium americanum John Thomas Howell 1950-7-18 27038 Tulare Bakeoven Meadow, S Fork of Kern River 2468 Comment
  UCD101908  Arceuthobium americanum John Thomas Howell 1969-9-13 46125 Sierra North shore of Webber Lake, Sierra Nevada. 2064 Comment
  CAS-BOT-BC409907  Arceuthobium campylopodum John Thomas Howell 1958-8-2 34294 Fresno Copper Creek Canyon trail 2286 Comment
  UCD101986  Arceuthobium campylopodum John Thomas Howell 1970-9-26 47488 Kern Loraine, Sierra Nevada. 822 Comment
  CAS-BOT-BC409942  Arceuthobium campylopodum John Thomas Howell; Gordon H. True 1966-7-12 41821 Kern rim of plateau just east of Fay Creek Canyon 2194 Comment
  SD113285  Arceuthobium campylopodum Darley F. Howe 1947-8-27 1726 San Bernardino Johnson Grade, San Bernardino Mts. Comment
  A14999  Arctostaphylos bakeri J. T. Howell 1933-4-2 10957 Unknown Serpentine ridge, 2 miles east of Occidental. Comment
  CAS-BOT-BC23940  Arctostaphylos canescens subsp. canescens John Thomas Howell 1943-8-8 19214 Tehama Log Spring Ridge, 1.1 miles west of ranger station. Comment
  POM203044  Arctostaphylos canescens subsp. canescens J. T. Howell 1934-3-3 11748 Sonoma Between Fort Ross and Stewart's Point. Comment
  CAS-BOT-BC23885  Arctostaphylos canescens subsp. sonomensis John Thomas Howell 1937-4-11 12894 Sonoma Rincon Ridge NE of Santa Rosa Comment
  CAS-BOT-BC23888  Arctostaphylos canescens subsp. sonomensis John Thomas Howell 1933-4-2 10942 Sonoma Rincon Ridge near Santa Rosa Comment
  UC876539  Arctostaphylos canescens subsp. sonomensis John Thomas Howell 1937-4-11 12894 Sonoma ne Santa Rosa; Rincon Ridge Comment
  A350168  Arctostaphylos canescens var. sonomensis J. T. Howell 1937-7-4 13079 Unknown Rincon Ridge, ne. of Santa Rosa Comment
  CAS-BOT-BC25152  Arctostaphylos crustacea John Thomas Howell 1953-2-1 28918 Santa Cruz Sand hills about 1 mile NW of Scott Valley Comment
  GH350275  Arctostaphylos crustacea var. rosei J. T. Howell 1934-3-9 11772 Unknown Lake Merced, San Francisco Comment
  CAS-BOT-BC23388  Arctostaphylos glandulosa subsp. cushingiana John Thomas Howell 1947-3-2 23037 Marin Above Blythedale Canyon, east side of Mt. Tamalpais. Comment
  CAS-BOT-BC23394  Arctostaphylos glandulosa subsp. cushingiana John Thomas Howell 1947-3-2 23036 Marin Above Blythedale Canyon, east side of Mt. Tamalpais Comment
  CAS-BOT-BC24831  Arctostaphylos glandulosa subsp. cushingiana John Thomas Howell 1954-2-28 29128 Marin Lower part of Throckmorton Ridge near Matt Davis Trail, Mt. Tamalpais Comment
  CAS-BOT-BC24837  Arctostaphylos glandulosa subsp. cushingiana John Thomas Howell 1933-3-19 10868 Marin S. side of Mt. Tamalpais above Mill Valley. Comment
  CAS-BOT-BC24755  Arctostaphylos glandulosa subsp. glandulosa John Thomas Howell 1931-9-27 8100 Mendocino 6 miles s of Point Arena. Comment
  CAS-BOT-BC24814  Arctostaphylos glandulosa subsp. glandulosa John Thomas Howell 1931-6-18 6740 Del Norte Smith River Canyon. Comment
  CAS-BOT-BC24686  Arctostaphylos glandulosa subsp. howellii John Thomas Howell 1955-5-17 30161 Monterey Summit ridge of Junipero Serra peak, Santa Lucia Mts. 1767 Comment
  SD50782  Arctostaphylos glandulosa subsp. mollis D. F. Howe 1959-4-19 2710 Santa Barbara Summit of Mt. Figueroa, San Raphael Mountains. 1381 Comment
  CAS-BOT-BC38970  Arctostaphylos manzanita subsp. elegans John Thomas Howell 1976-4-29 51625 Lake High Valley road e. of Clear Lake 1005 Comment
  CAS-BOT-BC38718  Arctostaphylos manzanita subsp. manzanita John Thomas Howell 1931-3-14 5775 Sonoma Vine Hill district, 10 miles west of Santa Rosa Comment
  CAS-BOT-BC38732  Arctostaphylos manzanita subsp. manzanita John Thomas Howell 1930-3-23 4565 Napa Crater Country near Mt. St. Helena Comment
  CAS-BOT-BC38899  Arctostaphylos manzanita subsp. manzanita John Thomas Howell 1954-5-18 29786 Amador Bushy hills, 2 miles nne of Buena Vista 91 Comment
  CAS-BOT-BC40160  Arctostaphylos montana subsp. montana John Thomas Howell 1947-5-25 23200 Marin Mt. Tamalpais, Simmons Trail Comment
  UCD52924  Arctostaphylos obispoensis John Thomas Howell 1956-3-23 San Luis Obispo On or near serpentine, 1 mile east of summit of Cambria-Adelaida road. ('Jack Mt.' acc. C.B. Hardham) Comment
  CAS-BOT-BC42090  Arctostaphylos patula John Thomas Howell 1976-4-2 51579 Plumas Near Spring Garden 1219 Comment
  SD67302  Arctostaphylos pilosula Darley F. Howe 1967-4-8 4331 San Luis Obispo La Panza Range, 4.5 mi. N by NE of Pozo 550 Comment
  SDSU2819  Arctostaphylos pilosula D. F. Howe 1967-4-8 4331 San Luis Obispo 4.5 miles north by northeast of Pozo. 549 Comment
  CAS-BOT-BC44868  Arctostaphylos pumila John Thomas Howell 1961-4-12 36482 Monterey Seaside, Santa Lucia Mountains Comment
  SD67321  Arctostaphylos pumila Darley F. Howe 1967-4-12 4344 Monterey Seaside, La Salle Street, across from Terrace Elementary School Comment
  CAS-BOT-BC43838  Arctostaphylos stanfordiana John Thomas Howell 1930-3-23 4559 Napa About 1 mile se. of Mt. St. Helena Inn. Near Mt. St. Helena. Comment
  CAS-BOT-BC47343  Arctostaphylos stanfordiana John Thomas Howell 1931-3-14 5764 Sonoma Rincon Ridge near Santa Rosa. Comment
  RSA381139  Arctostaphylos truei J. T. Howell 1975-6-15 51109 Butte Skyway near Billie Road, Paradise. 609 Comment
  UCD51940  Arctostaphylos truei John Thomas Howell 1976-4-2 51572 Plumas Injun Jim Campground, North Fork Feather River, Plumas County. 609 Comment
  UCD51950  Arctostaphylos truei John Thomas Howell 1975-6-15 51093 Butte In Upper Sonoran Zone on volcanic rock, about 2 miles from Paradise on 'Skyway' to Chico, Butte County. Comment
  UCD52644  Arctostaphylos viscida John Thomas Howell 1959-9-21 34776 Plumas North Fork Feather River near Belden 701 Comment
  CAS-BOT-BC47073  Arctostaphylos viscida subsp. viscida John Thomas Howell 1976-4-2 51578 Plumas 2 mi. nw. of Spring Garden. 1173 Comment
  NY342420  Arenaria rosei J. T. Howell 1955-6-13 30370 Trinity Peanut 762.0 Comment
  CAS-BOT-BC207126  Argythamnia lanceolata John Thomas Howell Jan. 29 1 (rest of year torn off sheet) 3298 Riverside Painted Canyon, Colorado Desert Comment
  CAS-BOT-BC137614  Aristida adscensionis John Thomas Howell 1960-3-22 35142 San Luis Obispo San Luis Obispo. Santa Lucia Mountains. Cuesta Park. Comment
  CAS-BOT-BC137575  Aristida oligantha John Thomas Howell 1954-9-5 30050 Amador 3 miles from Pine Grove on road to Jackson. Comment
  SD113737  Armeria maritima subsp. californica Darley F. Howe 1948-5-17 1830 San Luis Obispo Coast of San Luis Obispo. Comment
  CAS-BOT-BC82108  Arnica chamissonis John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-8-1 54609 Alpine Ebbetts Pass just east of summit 2633 Comment
  CAS-BOT-BC82643  Arnica lanceolata subsp. prima John Thomas Howell 1942-7-24 17066 Tulare Mineral King Comment
  SD81036  Arnica longifolia Darley F. Howe 1971-8-25 4773 Inyo Near South Lake, southwest of Bishop 3050 Comment
  RSA94852  Arnica longifolia subsp. myriadenia J. T. Howell 1926-7-30 2157 Plumas Near Prattville on Lake Almonor Comment
  UCD56025  Arrhenatherum elatius John Thomas Howell 1963-7-10 39724 Alpine Sierra Nevada. Markleeville. 1676 Comment
  CAS-BOT-BC146282  Arrhenatherum elatius var. elatius John Thomas Howell 1947-6-4 23224 Marin San Geronimo. Comment
  CAS-BOT-BC84978  Artemisia arbuscula subsp. arbuscula John Thomas Howell 1939-8-8 15167 Siskiyou Marble Mts., Black Mt. Comment
  POM180611  Artemisia biennis J. T. Howell 1930-10-26 5710 Monterey Sandy flood-plain of the Salinas River at the Soledad Bridge Comment
  CAS-BOT-BC90411  Artemisia douglasiana John Thomas Howell 1961-9-23 36865 Plumas Indian Valley 1082 Comment
  CAS-BOT-BC93959  Artemisia douglasiana John Thomas Howell 1956-12-2 31964 Stanislaus Bank of slough of San Joaquin River east of Vernalis on road to Modesto Comment
  SD128728  Artemisia dracunculus Darley F. Howe 1980-9-26 Inyo Highway 168, Inyo Mountains 1920 Comment
  UC710446  Artemisia ludoviciana subsp. incompta John Thomas Howell 15146 Siskiyou Marble Mts., Black Mt. Comment
  CAS-BOT-BC97138  Artemisia rothrockii John Thomas Howell 1945-9-24 21497 Tuolumne Soda Springs, Tuolumne Meadows Comment
  CAS-BOT-BC93545  Artemisia tridentata subsp. tridentata John Thomas Howell 1963-8-20 40156 Inyo Sierra Nevada - Whitney Portal 2545 Comment
  CAS-BOT-BC400671  Asarum hartwegii John Thomas Howell 1923-6-27 96 Mariposa Wawona 1219 Comment
  SEINET10895306  Asclepias eriocarpa John Thomas Howell, Gordon H. True 1967-8-9 Howell 43616 Tulare 6 mi N of Chimney Meadow, Kern Plateau 2103 Comment
  SD113029  Asclepias fascicularis Darley F. Howe 1936-8-8 413 San Diego Cuyamaca Mountains. Comment
  CAS-BOT-BC222858  Asclepias solanoana John Thomas Howell 1955-7-17 30697 Trinity Southwest of Peanut 762 Comment
  CAS-BOT-BC222863  Asclepias solanoana John Thomas Howell 1955-6-13 30371 Trinity Peanut 762 Comment
  CAS-BOT-BC478841  Asparagus officinalis John Thomas Howell 1967-10-19 44018 San Joaquin Caswell Memorial State Park Comment
  CAS-BOT-BC65768  Aspidotis californica John Thomas Howell 1930-10-12 5592 El Dorado North Fork of Cosumnes River, 6.5 miles N. of Plymouth Comment
  CAS-BOT-BC65859  Aspidotis carlotta-halliae John Thomas Howell 1967-3-5 42037 Marin near Rattlesnake Camp, Mt. Tamalpais Comment
  POM259366  Aster foliaceus var. parryi J. T. Howell 1939-8-2 14877 Siskiyou Spirit Lake, Marble Mountains. 1829 Comment
  RSA415795  Astragalus claranus J. T. Howell 1931-4-19 6431 Sonoma 12.5 miles from St. Helena on Spring Mountain Road to Santa Rosa. Comment
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Nov 17 2007
  CAS-BOT-BC177701  Astragalus congdonii John Thomas Howell; Gordon H. True 1970-6-10 46577 Tulare Below Potwisha. Sequoia Park 579 Comment
  CAS-BOT-BC182065  Astragalus filipes John Thomas Howell 1934-6-12 11986 Modoc Surprise Station. Comment
  UC864338  Astragalus kentrophyta var. danaus John Thomas Howell 1938-8-11 14540 Tuolumne Mt. Dana 3657 Comment
  SD62116  Astragalus minthorniae var. villosus Darley F. Howe 1965-5-15 4035 San Bernardino 28 miles north of Goffs 1370 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
  SD81292  Astragalus pachypus var. jaegeri D. F. Howe 1969-5-15 1591 Riverside Near Dripping Springs Campground (mak 10/07) 456 Comment
  RSA143770  Astragalus whitneyi var. lenophyllus J. T. Howell 1943-7-20 s.n. Nevada Castle Peak Comment
  CAS-BOT-BC198679  Astragalus whitneyi var. whitneyi John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-6-28 53143 Alpine Western slope of Ebbetts Peak - Sierra Nevada 2773 Comment
  CAS-BOT-BC17400  Athysanus pusillus John Thomas Howell; Gordon H. True; Roberta Shockey 1978-4-5 52754 Calaveras Sierra Nevada. Camp Nine Road northeast of Vallecito. 609 Comment
  CAS-BOT-BC17605  Athysanus pusillus John Thomas Howell; Gordon H. True 1967-5-30 42435 Tulare Sierra Nevada. Kern Plateau. Slopes west of Lamont Meadow. 1706 Comment
  CAS-BOT-BC17608  Athysanus pusillus John Thomas Howell 1951-6-28 27670 Plumas Sierra Nevada. Jamison Creek. 1584 Comment
  CAS-BOT-BC168626  Atriplex John Thomas Howell; Gordon H. True 1967-7-6 43236 Tulare About 4.5 miles east-northeast of Pixley. Near southwest corner of area 83 Comment
  CAS-BOT-BC168639  Atriplex John Thomas Howell; Gordon H. True 1967-8-10 43732 A Tulare From N 1/3 of area. About 4.5 miles east-northeast of Pixley 83 Comment
  UCR88042  Atriplex argentea subsp. expansa J. T. Howell 1967-11-3 s.n. Tulare Vernal pool natural area in Valley Grassland, about 4.5 miles east-northeast of Pixley 84 Comment
  UCD97294  Atriplex canescens John Thomas Howell; Gordon H. True 1971-6-16 47882 Kern along Kelso Creek 7 miles south of Weldon on road to Kelso Valley. 914 Comment
  CAS-BOT-BC170182  Atriplex canescens subsp. canescens John Thomas Howell 1963-8-20 40112 Kern South Fork Valley about 2 miles ne. of Weldon - Sierra Nevada 807 Comment
  SDSU5532  Atriplex confertifolia D. F. Howe 1959-4-14 2695 Inyo 12 1/2 mi. north of Shoshone on #127. Comment
  SD112473  Atriplex coronata var. notatior Darley F. Howe 1949-7-2 2076 San Diego Chula Vista Comment
  CAS-BOT-BC172649  Atriplex coulteri John Thomas Howell 1931-4-11 6267 Santa Barbara Valley Anchorage, Santa Cruz Island Comment
  CAS-BOT-BC168448  Atriplex parishii var. persistens John Thomas Howell 1967-11-4 44072 Tulare About 4.5 miles east-northeast of Pixley 83 Comment
  CAS-BOT-BC168460  Atriplex parishii var. subtilis John Thomas Howell; Gordon H. True 1967-5-31 42515 Tulare About 4 1/2 miles east-northeast of Pixley. From S 1/3 of area 83 Comment
  CAS-BOT-BC168477  Atriplex parishii var. subtilis John Thomas Howell; Gordon H. True 1967-9-21 44006 Tulare About 4.5 miles east-northeast of Pixley. N 1/3 of area 83 Comment
  LA204693  Atriplex pusilla John Thomas Howell; 1938-8-8 14381 Mono Long Valley Comment
  RSA252  Atriplex serenana J. T. Howell 1927-7-22 459 Orange North of Botany Garden, Rancho Santa Ana. 274 Comment
  SD112536  Atriplex triangularis Darley F. Howe 1938-8-2 730 Los Angeles Coast south of Long Beach. Comment
  CAS-BOT-BC146061  Avena barbata John Thomas Howell 1963-5-18 39299 Monterey 2.5 miles south of Aromas. 60 Comment
  CAS-BOT-BC145959  Avena fatua John Thomas Howell 1956-4-25 31293 San Mateo Skyline Boulevard just north of Crystal Springs Lake Dam. Comment
  POM350406  Baccharis pilularis J. T. Howell 1932-10-8 10802 Napa Napa River levee at Cuttings Wharf Comment
  RSA215927  Baccharis pilularis J. T. Howell 1957-6-11 32589 San Francisco North slope of Lone Mountain Comment
Read comments
Dec 21 2011
  CAS-BOT-BC99728  Baccharis salicifolia John Thomas Howell; Gordon H. True 1971-6-15 47741 Kern On road from Havilah to Walker Basin 1219 Comment
  CAS-BOT-BC100018  Balsamorhiza deltoidea John Thomas Howell 1962-5-23 37404 Kern Kern River Canyon near Miracle Hot Springs 731 Comment
  SD88374  Barbarea orthoceras Darley F. Howe 1972-4-27 Marin Bolinas Ridge Comment
  CAS-BOT-BC413095  Bistorta bistortoides John Thomas Howell; Gordon H. True 1966-7-11 41619 Tulare Poison Meadow, Kern Plateau 2286 Comment
  CAS-BOT-BC127951  Blepharipappus scaber John Thomas Howell 1934-6-10 11894 Lassen Horse Lake Comment
  CAS-BOT-BC128044  Blepharipappus scaber John Thomas Howell 1934-6-10 11894 Lassen Horse Lake Comment
  CAS-BOT-BC15793  Boechera acutina John Thomas Howell 1939-8-9 15193 Siskiyou Marble Mountains. Sky High Valley. 1828 Comment
  CAS-BOT-BC15875  Boechera arcuata John Thomas Howell 1964-4-27 40515 Mariposa Sierra Nevada. El Portal. 640 Comment
  CAS-BOT-BC16041  Boechera breweri subsp. shastaensis John Thomas Howell 1951-6-27 27639 Plumas Sierra Nevada. Jamison Creek. 1828 Comment
  CAS-BOT-BC16047  Boechera breweri subsp. shastaensis John Thomas Howell 1937-7-22 13265 Siskiyou South Fork of Salmon River near Big Flat. 1524 Comment
  CAS-BOT-BC16210  Boechera depauperata John Thomas Howell 1947-8-10 23971 Inyo Big Pines Lakes. Near Sam Mack Lake. 3657 Comment
  CAS-BOT-BC13965  Boechera lemmonii John Thomas Howell 1948-7-18 25097 Tulare Center Basin. 3657 Comment
  CAS-BOT-BC13968  Boechera lemmonii John Thomas Howell 1949-7-23 25653 Tulare Soldier Lake. 3352 Comment
  CAS-BOT-BC13987  Boechera lemmonii John Thomas Howell 1944-8-12 20369 Tuolumne Gaylor Lakes. 3291 Comment
  CAS-BOT-BC14255  Boechera pinetorum John Thomas Howell; Gordon H. True 1973-7-31 50131 Plumas Sierra Nevada. Diamond Range. On road from Janesville to Thompson Peak. 1981 Comment
  CAS-BOT-BC14432  Boechera platysperma John Thomas Howell 1942-7-24 17059 Tulare Mineral King. Comment
  CAS-BOT-BC14436  Boechera platysperma John Thomas Howell; Gordon H. True 1967-8-7 43398 Tulare Sierra Nevada. Kern Plateau. About 3 miles northwest of Beach Meadow. 2499 Comment
  CAS-BOT-BC410926  Boechera platysperma John Thomas Howell; Gordon H. True 1971-7-13 48343 Tulare Sierra Nevada, Kern Plateau. Northeast end of Big Meadow on N. Martin Pass Trail 2499 Comment
  CAS-BOT-BC14596  Boechera pulchra John Thomas Howell; Gordon H. True 1967-7-5 43065 Tulare Sierra Nevada. Kern Plateau. 6.4 miles north of Chiimney Meadow. 2225 Comment
  CAS-BOT-BC14702  Boechera rectissima John Thomas Howell; Gordon H. True 1967-6-12 42585 Plumas Sierra Nevada. North side of American Valley near Quincy. 1036 Comment
  CAS-BOT-BC25277  Boechera repanda John Thomas Howell 1962-7-11 38546 Kern Sierra Nevada. Greenhorn Mountains. Black Mountain, northwest slope. 2133 Comment
  CAS-BOT-BC25492  Boechera retrofracta John Thomas Howell 1946-7-14 22359 Inyo Rock Creek Lake Basin. Mosquito Flat. 3139 Comment
  CAS-BOT-BC25515  Boechera retrofracta John Thomas Howell 1938-8-10 14462 Madera Near Devil's Postpile. Comment
  CAS-BOT-BC25518  Boechera retrofracta John Thomas Howell 1938-8-10 14462 Madera Near Devil's Postpile. Comment
  CAS-BOT-BC25532  Boechera retrofracta John Thomas Howell 1934-6-30 12267 Modoc Duncan Horse Camp. Comment
  CAS-BOT-BC25544  Boechera retrofracta John Thomas Howell 1938-8-10 14488 Mono Minaret Summit. Comment
  CAS-BOT-BC25513  Boechera retrofracta John Thomas Howell; Gordon H. True 1934-7-19 8852 Madera Meadow between Satcher Lake and Devil's Postpile. 2316 Comment
  CAS-BOT-BC25971  Boechera xylopoda John Thomas Howell; Gordon H. True 1968-5-13 44315 A Kern Sierra Nevada. Kern Plateau. Cherry Hill Road, Brush Creek Canyon. 1584 Comment
  SD45779  Boechera xylopoda Darley F. Howe 1954-5-30 Ventura Ridge between Lockwood Valley and Piru Creek. 2135 Comment
  SD44067  Boerhavia intermedia Darley F. Howe 1950-10-1 2041 San Diego Sentenac Canyon Comment
  RSA31366  Boisduvalia stricta J. T. Howell 1942-6-12 16984 Marin Carson Ridge Comment
  SD112184  Bothriochloa barbinodis Darley F. Howe 1941-7-11 1184 San Diego Dry hillside, about one mile east of Sunnyside. Comment
  SD44978  Boykinia occidentalis Darley F. Howe 1952-6-22 2241 Monterey Santa Lucia Mts. 456 Comment
  CAS-BOT-BC145421  Brachypodium distachyon John Thomas Howell 1966-6-9 41563 Marin Just north of the John Thomas Howell Botanical Garden, Tiburon. Comment
  CAS-BOT-BC29995  Brassica juncea John Thomas Howell 1956-7-15 31679 San Francisco San Francisco. Waterfront Street near Mission Rock Terminal. Comment
  CAS-BOT-BC106232  Brickellia californica John Thomas Howell 1959-9-21 34774 Plumas Dry rocky river bench, N. Fk. Feather River near Belden 701 Comment
  SDSU6409  Brickellia desertorum D. F. Howe 1970-9-17 4706 San Bernardino South side of Clark Mt. 1890 Comment
  CAS-BOT-BC127783  Brickellia grandiflora John Thomas Howell 1942-7-27 17310 Tulare Cliff Creek between Deer Creek and Pinto Lake Comment
  CAS-BOT-BC127858  Brickellia grandiflora John Thomas Howell 1939-8-4 15044 Siskiyou Marble Mts., Marble Rim 1889 Comment
  CAS-BOT-BC127678  Brickellia greenei John Thomas Howell 1959-9-26 35089 A Butte On serpentine at Pulga Bridge, Feather River Canyon 417 Comment
  JEPS58967  Brickellia microphylla var. microphylla John Thomas Howell 1962-9-25 38880 Kern 3 mi n Kernville; Sierra Nevada 822 Comment
  SEINET10570602  Brodiaea capitata Howery HOWERY s.n. 1912 Los Angeles Claremont Comment
  CAS-BOT-BC144190  Bromus arenarius John Thomas Howell 1962-5-20 37122 Kern Sierra Nevada. Kernville. 807 Comment
  SEINET7296685 Image available Bromus arenarius John Thomas Howell 1958-1 34222 Fresno On zigzags of Copper Creek Canyon trail. 1676 Comment
  RSA120970  Bromus arizonicus J. T. Howell 1956-3-25 31196 Monterey Salina Valley, 6.5 miles from King City on Arroyo Seco Road Comment
  CAS-BOT-BC149251  Bromus carinatus var. carinatus John Thomas Howell 1955-5-20 30210 Monterey Soledad. Comment
  CAS-BOT-BC149590  Bromus carinatus var. carinatus John Thomas Howell 1945-6-19 21046 Lake Sawmill Flat. Bartlett Mountain. 1219 Comment
  CAS-BOT-BC148414  Bromus carinatus var. marginatus John Thomas Howell 1944-8-5 19956 Tuolumne Tuolumne Meadows. Near Parsons Lodge. Comment
  CAS-BOT-BC148685  Bromus carinatus var. marginatus John Thomas Howell 1943-7-14 18326 Nevada West side of Donner Pass near Norden. 2133 Comment
  CAS-BOT-BC148909  Bromus carinatus var. marginatus John Thomas Howell 1948-5-31 24326 Marin Devils Gulch near Camp Taylor. Comment
  CAS-BOT-BC156211  Bromus catharticus John Thomas Howell 1953-5-8 28955 Monterey Carmel. Comment
  CAS-BOT-BC156237  Bromus catharticus John Thomas Howell 1962-5-21 37142 Kern Sierra Nevada. Kernville. 807 Comment
  CAS-BOT-BC156240  Bromus catharticus John Thomas Howell 1950-7-11 26647 Kern Mojave. Comment
  CAS-BOT-BC156268  Bromus catharticus John Thomas Howell 1958-5-24 33292 Inyo Sierra Nevada. Whitney Portal Road. 2346 Comment
  CAS-BOT-BC156283  Bromus catharticus John Thomas Howell; Gordon H. True 1968-6-9 44512 Placer Sierra Nevada. Alta. 1066 Comment
  RSA121040  Bromus catharticus J. T. Howell 1956-3-10 30919 Ventura Along street, Thompson Blvd. and Chrisman Ave., Ventura. Comment
  UCD58427  Bromus ciliatus John Thomas Howell 1958-7-24 33895 Fresno Sierra Nevada. Simpson Meadow. Middle Fork of the Kings River. 1828 Comment
  CAS-BOT-BC155645  Bromus diandrus John Thomas Howell; Gordon H. True 1968-5-15 44473 Tulare About 4.5 miles east-northeast of Pixley. 83 Comment
  RSA44  Bromus diandrus J. T. Howell 1927-6-9 67 Orange Botany Garden, Rancho Santa Ana. 152 Comment
  CAS-BOT-BC155036  Bromus hordeaceus John Thomas Howell 1955-5-19 30199 Monterey Avila Ranch. Santa Lucia Mountains west of King City. 457 Comment
  CAS-BOT-BC155195  Bromus hordeaceus John Thomas Howell 1956-5-26 31455 Santa Clara Mount Hamilton. Summit Ridge. Comment
  CAS-BOT-BC155407  Bromus hordeaceus John Thomas Howell 1962-5-23 37403 Kern Sierra Nevada. Kern River Canyon near Miracle Hot Springs. 731 Comment
  SD112426  Bromus hordeaceus Darley F. Howe 1940-4-14 985 San Diego Roadside near Otay. Comment
  UCD58854  Bromus inermis John Thomas Howell; Gordon H. True 1973-8-1 50221 Lassen Sierra Nevada. East slope of Diamond Range south of Susanville. 2164 Comment
  CAS-BOT-BC155344  Bromus japonicus John Thomas Howell 1954-6-6 29973 Tuolumne Sierra Nevada. Twain Harte. 1127 Comment
  CAS-BOT-BC162365  Bromus madritensis John Thomas Howell 1967-6-22 42622 Butte Sierra Nevada. Magalia. 701 Comment
  RSA126123  Bromus madritensis J. T. Howell 1952-5-20 28315 San Francisco Golden Gate Park, near 8th Av. and Fulton St., San Francisco Comment
  CAS-BOT-BC162252  Bromus maritimus John Thomas Howell 1946-6-30 22147 Marin Rodeo Lagoon. Comment
  CAS-BOT-BC162155  Bromus orcuttianus John Thomas Howell 1973-7-9 49722 Plumas Sierra Nevada. Round Valley. 1371 Comment
  CAS-BOT-BC161444  Bromus tectorum John Thomas Howell 1958-5-21 33048 Kern Sierra Nevada. Kern River Canyon near Bodfish. 762 Comment
  CAS-BOT-BC185456  Calamagrostis canadensis John Thomas Howell 1946-8-30 22912 El Dorado Upper Angora Lake. 2286 Comment
  CAS-BOT-BC185233  Calamagrostis koelerioides John Thomas Howell 1949-6-26 25352 A Marin Mount Tamalpais. Firetrail north of East Peak. Comment
  CAS-BOT-BC185193  Calamagrostis muiriana John Thomas Howell 1944-8-12 20372 Tuolumne Gaylor Lakes. 3291 Comment
  CAS-BOT-BC185211  Calamagrostis muiriana John Thomas Howell 1940-8-8 16048 Tulare Between Reflection Lake and Harrison Pass. Comment
  UCD57453  Calamagrostis muiriana John Thomas Howell 1942-7-29 17379 Tulare Little Five Lakes Basin. Comment
  SD56821  Calandrinia breweri Darley F. Howe 1963-5-19 3497 San Luis Obispo Hillside south of Morro Bay Comment
  CAS-BOT-BC438356  Calandrinia ciliata John Thomas Howell 1978-4-17 52844 Butte Table Mountain 381 Comment
  SD214616  Calandrinia ciliata Darley F. Howe Mar 1915 30 Los Angeles Claremont Comment
  CAS-BOT-BC273246  Calendula arvensis John Thomas Howell 1954-4-1 29138 Sonoma Along highway just east of Shellville Comment
  CAS-BOT-BC85677  Calocedrus decurrens John Thomas Howell; Gordon H. True 1968-5-13 44301 Tulare Sierra Nevada, Kern Plateau - cherry Hill road, Poison Meadow Creek Canyon 2255 Comment
  SD88413  Calochortus amabilis Darley F. Howe 1972-4-25 Sonoma Trinity Road, Mount Hood Range. 121 Comment
  SD53281  Calochortus amoenus Darley F. Howe 1962-5-15 3234 Fresno 7 miles south of Shaver Lake on #168, Sierra National Forest. 1067 Comment
  CAS-BOT-BC490203  Calochortus invenustus John Thomas Howell 1950-7-15 26892 Tulare Bakeoven Meadows, South Fork of the Kern River, Sierra Nevada 2468 Comment
  CAS-BOT-BC487933  Calochortus kennedyi John Thomas Howell 1927-6-11 2499 San Bernardino Mojave Desert, 12 miles south-east of Victorville 914 Comment
  CAS-BOT-BC491826  Calochortus leichtlinii John Thomas Howell 1951-6-27 27560 Plumas Johnsville 1584 Comment
  SD73209  Calochortus luteus Darley F. Howe 1969-6-11 Monterey Huckleberry Hill, Monterey Peninsula. Comment
  SD62151  Calochortus nudus Darley F. Howe 1965-5-21 Placer Canyon on south side of north fork of American River, between Forest Hill and Yankee Jims. 914 Comment
  SD41248  Calochortus plummerae Darley F. Howe 1946-6-2 1405 San Bernardino Cajon Pass. Comment
  SD112773  Calochortus weedii var. weedii Darley F. Howe 1935-6-16 247 San Diego Japatul Comment
  CAS-BOT-BC270796  Calycadenia pauciflora John Thomas Howell 1930-8-24 5443 Lake 4 miles from Middletown on Adams Springs Road Comment
  GH414371  Calycadenia truncata subsp. microcephala J. T. Howell 1943-5-10 18009 Unknown 5 miles west of Lakeport on road to Hopland Comment
  POM193974  Calycadenia truncata subsp. truncata J. T. Howell 1929-10-20 4526 Alameda Near summit of Cedar Mt. Comment
  CAS-BOT-BC275354  Calycadenia truncata var. truncata John Thomas Howell 1930-10-12 5577 El Dorado Near Coloma Comment
  CAS-BOT-BC275384  Calycadenia truncata var. truncata John Thomas Howell 1959-9-26 35089 Butte At Pulga Bridge, N Fork Feather River 417 Comment
  GH414364  Calycadenia villosa J. T. Howell 1930-10-24 5632 Unknown Santa Lucia Mts. Comment
Read comments
Nov 15 2020
  SD81136  Calystegia longipes Darley F. Howe 1971-6-22 4736 Inyo 0.8 mile west of entrance to Inyo National Forest, west of Big Pine. 1555 Comment
  CAS-BOT-BC221302  Calystegia macrostegia subsp. intermedia John Thomas Howell 1927-6-9 2462 Orange Southern Puente Hills, in the Santa Ana Canon [Canyon] 152 Comment
  CAS-BOT-BC224723  Calystegia purpurata subsp. saxicola John Thomas Howell 1947-6-18 23285 Marin North of Dillons Beach Comment
  CAS-BOT-BC224727  Calystegia purpurata subsp. saxicola John Thomas Howell 1946-6-9 22013 Marin Pierce Ranch, n. Pt. Reyes Peninsula Comment
  CAS-BOT-BC224741  Calystegia purpurata subsp. saxicola John Thomas Howell 1930-6-8 5290 Sonoma 8.5 miles n. of Bodega Bay Comment
  CAS-BOT-BC436383  Calystegia subacaulis John Thomas Howell 1933-5-28 11374 Alameda Summit of Berkeley Hills at head of Strawberry Canyon Comment
  POM181149  Camissonia graciliflora J. T. Howell 1931-3-22 5956 Monterey Stone Canyon. Comment
  SD113976  Camissoniopsis pallida subsp. pallida Darley F. Howe 1939-5-9 810 San Diego Montezuma Valley Comment
  UCD66815  Campanula angustiflora John Thomas Howell 1946-5-12 21818 Marin Carson Country. Comment
  SDSU1313  Campanula scouleri D. F. Howe 1972-7-6 4877 Siskiyou 1.3 miles south of Oregon state line on road to Happy Camp. 1646 Comment
  RSA281427  Canbya candida J. T. Howell 1948-4-25 24227 Kern Between Kernville and Isabella. Comment
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Apr 27 2011
  CAS-BOT-BC37203  Capsella bursa-pastoris John Thomas Howell 1943-8-12 19287 Glenn Canyon of Snow Basin Creek. Comment
  CAS-BOT-BC37205  Capsella bursa-pastoris John Thomas Howell 1967-4-30 42096 Tulare About 4.5 miles east-northeast of Pixley. Across Road 160 from northwest corner of reserve. 83 Comment
  RSA1442  Cardamine californica var. integrifolia J. T. Howell 1929-2-11 1226 Orange Claymine Canyon, Samta Ana Mts. 305 Comment
  CAS-BOT-BC471264  Cardamine cordifolia John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50635 Plumas Sierra Nevada. Headwaters of Indian Creek SE of Diamond Mt. 2164 Comment
  CAS-BOT-BC37920  Cardamine oligosperma John Thomas Howell 1964-4-28 40598 Mariposa Sierra Nevada. 2 miles east of Morman Bar. 670 Comment
  CAS-BOT-BC38094  Cardamine pachystigma John Thomas Howell; Gordon H. True 1967-5-9 42217 Plumas Sierra Nevada. Lewisia Rock, 3.5 miles southwest of Belden, Feather River Canyon. 609 Comment
  SD88450  Carduus pycnocephalus subsp. pycnocephalus Darley F. Howe 1972-6-23 Monterey 4.4 miles north of Gorda. Comment
  CAS-BOT-BC18283  Carex John Thomas Howell 1962-7-10 38446 Kern Sierra Nevada. Greenhorn Mountains, 1.5 miles south of Summit. 1950 Comment
  CAS-BOT-BC18514  Carex abrupta John Thomas Howell 1948-7-29 25150 Fresno Bubbs Creek Canyon in vicinity of Vidette Meadows. 3048 Comment
  CAS-BOT-BC18537  Carex abrupta John Thomas Howell 1941-7-25 16456 Madera Agnew Meadows. Comment
  CAS-BOT-BC18548  Carex abrupta John Thomas Howell; Gordon H. True 1968-7-18 4427 A Mono Sierra Nevada. Basin at north end of Saddlebag Lake, head of Lee Vining Creek. Near boat landing. 3048 Comment
  CAS-BOT-BC19762  Carex abrupta John Thomas Howell 1939-8-3 15004 Siskiyou Spirit Lake, Marble Mountains. 1828 Comment
  CAS-BOT-BC19766  Carex abrupta John Thomas Howell 1939-8-3 14962 Siskiyou Marble Mountains. Spirit Lake. 1828 Comment
  SD130373  Carex abrupta John Thomas Howell 1958-8-14 34422 Madera Near Isberg Lake 2987 Comment
  CAS-BOT-BC17988  Carex aquatilis John Thomas Howell 1941-7-25 16458 Madera Agnew Meadows. Comment
  RSA43277  Carex aquatilis J. T. Howell 1944-7-17 s.n. Glenn Plaskett Meadows. 1829 Comment
  CAS-BOT-BC17976  Carex aquatilis John Thomas Howell 1945-9-29 21526 El Dorado South end of Echo Lake. Comment
  CAS-BOT-BC17994  Carex aquatilis John Thomas Howell 1944-8-9 20198 A Tuolumne Tuolumne Meadows. Along river near Parsons Lodge. Comment
  CAS-BOT-BC18131  Carex athrostachya John Thomas Howell 1939-8-8 15139 Siskiyou Marble Mountains. Between Sky High Valley and Marble Valley. Comment
  CAS-BOT-BC19069  Carex aurea John Thomas Howell 1958-7-25 33914 Fresno Sierra Nevada. Middle Fork of the Kings River. Simpson Meadow. 1828 Comment
  CAS-BOT-BC19375  Carex barbarae John Thomas Howell 1980-10-6 53903 Stanislaus Sierra Nevada. Stanislaus River near Ripon. At Caswell Memorial State Park. 15 Comment
  RSA22104  Carex bolanderi J. T. Howell 1938-7-17 13979 Solano Green Valley Falls. Comment
  CAS-BOT-BC19643  Carex brainerdii John Thomas Howell 1960-8-19 36174 Shasta Lassen Volcanic National Park. Summit Ridge, Brokeoff Mountain. 2773 Comment
  CAS-BOT-BC19657  Carex brainerdii John Thomas Howell 1939-8-3 15008 Siskiyou Marble Mountains. Spirit Lake. 1828 Comment
  SEINET10380202  Carex brainerdii John Thomas Howell 1960-6-6 35361 Fresno Sierra Nevada, Kings Canyon 1.5 miles west of Cedar Grove 1372 Comment
  CAS-BOT-BC34033  Carex brevicaulis John Thomas Howell 1946-4-14 21628 Marin Near Dillons Beach. Comment
  CAS-BOT-BC34038  Carex brevicaulis John Thomas Howell 1969-4-20 45515 Marin Point Reyes National Seashore. Higher slopes of Mount Wittenberg. Comment
  CAS-BOT-BC34053  Carex brevicaulis John Thomas Howell 1957-4-27 32025 Monterey Prunedale. Comment
  RSA0079899  Carex brevicaulis John Thomas Howell 1938-4-12 13766 San Francisco Lake Merced, San Francisco. Comment
  UC905037  Carex breweri John Thomas Howell 1945-9-27 21518 Tuolumne Mount Dana Sierra Nevada 3505 Comment
  RSA52096  Carex buxbaumii J. T. Howell 1945-7-18 21327 Sonoma Pitkin Marsh Comment
  CAS-BOT-BC34362  Carex congdonii John Thomas Howell 1949-8-8 26153 Tulare Sierra Nevada. Above Sky Blue Lake. 3657 Comment
  CAS-BOT-BC34393  Carex cusickii John Thomas Howell 1938-6-5 13902 Marin Rock Spring, Mt. Tamalpais. Comment
  CAS-BOT-BC34430  Carex davyi John Thomas Howell 1946-8-31 22954 El Dorado Northeast of Gilmore Lake. 2682 Comment
  CAS-BOT-BC34884  Carex deflexa var. boottii John Thomas Howell 1937-7-24 13430 Siskiyou Caribou Basin, Salmon-Trinity Alps. 2286 Comment
  UCD140244  Carex deflexa var. boottii John Thomas Howell 1961-6-20 36553 Shasta Lassen Volcanic National Park, Dersch Meadows. 1981 Comment
  CAS-BOT-BC18976  Carex densa John Thomas Howell 1938-7-3 13948 Sonoma Stony Point. Comment
  UC904992  Carex densa John Thomas Howell 1945-5-6 Marin San Rafael, near Dominican College Comment
  SEINET8139110 Image available Carex densa J. T. Howell, J. W. Stacey 1935-1 12659 Unknown Comment
  POM248596  Carex dudleyi J. T. Howell 1938-7-3 13948 Sonoma Stony Point. Comment
  CAS-BOT-BC20075  Carex echinata John Thomas Howell 1948-7-22 24863 Fresno Bubbs Creek Canyon in vicenity of Vidette Meadows. 3048 Comment
  CAS-BOT-BC19897  Carex echinata subsp. phyllomanica John Thomas Howell 1945-5-30 20892 Sonoma Pitkin Marsh. Comment
  CAS-BOT-BC20028  Carex feta John Thomas Howell 1976-8-13 52249 Mariposa Sierra Nevada. Yosemite Valley. Near Yosemite Lodge. 1219 Comment
  CAS-BOT-BC21170  Carex fissuricola John Thomas Howell 1948-7-23 24951 Fresno Bubbs Creek Canyon in vicinity of Vidette Meadows. 3048 Comment
  CAS-BOT-BC20691  Carex fracta John Thomas Howell 1960-7-20 35710 Plumas Lassen Volcanic National Park. Drakesbad. 1828 Comment
  CAS-BOT-BC20697  Carex fracta John Thomas Howell 1951-6-28 27649 Plumas Sierra Nevada. Johnsville. 1584 Comment
  CAS-BOT-BC21300  Carex fracta John Thomas Howell 1945-6-19 21013 Lake Bartlett Mountain. Sawmill Flat. 1219 Comment
  RSA201272  Carex fracta J. T. Howell 1960-7-19 35676 Plumas Drakesbad. 1677 Comment
  CAS-BOT-BC20851  Carex globosa John Thomas Howell 1941-4-5 16157 Napa Franz Valley. Comment
  RSA20488  Carex globosa J. T. Howell 1937-5-23 13005 San Francisco Presidio, San Francisco. Comment
  SEINET7847007 Image available Carex globosa J. T. Howell 1944-4-2 19368 A Marin SE of Laurel Del. Mount Tamalpais 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-BC21878  Carex harfordii John Thomas Howell 1944-6-10 19579 Santa Cruz 1.5 miles north of Felton. 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
  SD60945  Carex heteroneura D. F. Howe 1964-7-19 Fresno Sierra National Forest; Badger Flat east of Huntington Lake 2438 Comment
  UC710456  Carex heteroneura var. epapillosa John Thomas Howell 1944-8-7 20055 Tuolumne Tuolumne Meadows Comment
  UC1026408  Carex hirtissima John Thomas Howell 1954-6-7 29988 Tuolumne In Transition Zone Forest, Twain Harte. Comment
  CAS-BOT-BC17151  Carex illota John Thomas Howell 1941-8-3 16743 Madera Near Garnett Lake. 2956 Comment
  CAS-BOT-BC28056  Carex illota John Thomas Howell 1944-8-8 20115 Tuolumne Elizabeth Lake. Comment
  CAS-BOT-BC7835  Carex incurviformis John Thomas Howell 1944-8-15 20561 Tuolumne Mt. Conness. 3749 Comment
  CAS-BOT-BC7657  Carex integra John Thomas Howell 1937-7-22 13253 Siskiyou South Fork of Salmon River near Big Flat. 1524 Comment
  CAS-BOT-BC35499  Carex jonesii John Thomas Howell 1949-7-19 25478 Tulare Rock Creek 3200 Comment
  CAS-BOT-BC35454  Carex jonesii John Thomas Howell; Gordon H. True 1966-7-11 41627 A Tulare Kern Plateau, Poison Meadow, banks of Poison Meadow Creek 2286 Comment
  CAS-BOT-BC31098  Carex leavenworthii John Thomas Howell 1946-6-8 21990 Alameda Berkeley Tennis Club Comment
  UC1147785 Image available Carex lemmonii J. T. Howell and J. W. Stacey 1937-6-6 13042 Sonoma Pitkin Marsh; ; Pitkin Marsh, Sonoma Co. Comment
  SD56703  Carex lenticularis var. lipocarpa Darley F. Howe Aug 1963 Del Norte Siskiyou National Forest; Sanger Lake; 9.7 miles south of California- Oregon line. 1524 Comment
  CAS-BOT-BC31401  Carex leporinella John Thomas Howell 1958-7-30 34108 Fresno West of Simpson Meadow, Middle fork of the Kings River. 1813 Comment
  CAS-BOT-BC31671  Carex luzulina var. ablata John Thomas Howell 1960-8-24 36464 Tehama Lassen Loop, 1/2 mi SE of Sulphur Works. 2133 Comment
  CAS-BOT-BC31621  Carex luzulina var. luzulina John Thomas Howell 1937-7-23 13332 Siskiyou South Fork of Salmon River near Big Flat. 1524 Comment
  CAS-BOT-BC31677  Carex mariposana John Thomas Howell 1958-7-23 33857 Fresno Simpson Meadow, Middle Fork of the Kings River 1828 Comment
  CAS-BOT-BC31695  Carex mariposana John Thomas Howell 1943-7-26 18852 Placer Sugar Bowl NW of Mt. Lincoln Comment
  CAS-BOT-BC31745  Carex mariposana John Thomas Howell 1962-7-10 38443 Kern 1.5 mi S of Summit. Greenhorn Mountains. 1950 Comment
  CAS-BOT-BC31748  Carex mariposana John Thomas Howell 1958-8-17 34543 Madera East Fork of Granite Creek, between Cora Lake & The Niche. 2560 Comment
  GH351986  Carex mendocinensis J. T. Howell & J. W. Stacey 1936-6-7 12658 Unknown Serpentine area near Bootjack, Mt. Tamalpais Comment
  CAS-BOT-BC146624  Carex mendocinensis John Thomas Howell 1936-8-26 12808 Trinity Tangle Blue Creek, Scott Mts. Comment
  CAS-BOT-BC31855  Carex microptera John Thomas Howell 1944-8-16 20648 Mono Mono Pass Comment
  CAS-BOT-BC31858  Carex microptera John Thomas Howell 1944-8-10 20273 Mono Glacier Canyon, Mt. Dana. Comment
  CAS-BOT-BC31889  Carex microptera John Thomas Howell 1941-7-31 16558 Madera Agnew Pass Trail. Comment
  CAS-BOT-BC31833  Carex microptera John Thomas Howell 1938-8-2 14006 Placer 5 miles N of Brockway Comment
  SD112268  Carex multicaulis Darley F. Howe 1940-6-7 1017 San Diego Cuyamaca, North Peak. Comment
  CAS-BOT-BC119986  Carex multicostata John Thomas Howell 1951-7-20 27992 Tulare Farewell Gap Trail. 2895 Comment
  CAS-BOT-BC119990  Carex multicostata John Thomas Howell 1942-8-1 17546 Tulare Sky Parlor Meadow, Chagoopa Plateau Comment
  CAS-BOT-BC32227  Carex multicostata John Thomas Howell 1960-7-20 35732 Plumas Boiling Springs Lake to Drakesbad. 1828 Comment
  CAS-BOT-BC32271  Carex multicostata John Thomas Howell 1938-8-8 14432 Mono Mammouth Lakes Basin. Comment
  CAS-BOT-BC32277  Carex multicostata John Thomas Howell 1939-8-8 15149 A Siskiyou Black Mt. Comment
  CAS-BOT-BC119956  Carex nebrascensis John Thomas Howell; Gordon H. True 1967-9-20 43955 Tulare Powell Meadow, ca 6 mi N of Blackrock Guard Station. 2682 Comment
  CAS-BOT-BC119716  Carex nervina John Thomas Howell 1976-7-19 51989 Lassen On Gold Run Creek SW of Susanville. 1386 Comment
  CAS-BOT-BC119659  Carex neurophora John Thomas Howell 1943-8-5 19092 A Glenn Plaskett Meadows. Near fish tanks. 1828 Comment
  CAS-BOT-BC9294  Carex orestera John Thomas Howell 1949-8-5 26055 Inyo Army Pass 3657 Comment
  CAS-BOT-BC119094  Carex phaeocephala John Thomas Howell 1948-7-20 24791 Inyo East side of Kearsarge Pass. 3505 Comment
  CAS-BOT-BC119141  Carex phaeocephala John Thomas Howell 1940-8-2 15916 Tulare West of Reflection Lake. 3505 Comment
  CAS-BOT-BC118774  Carex preslii John Thomas Howell 1937-7-25 13485 Siskiyou Caribou Basin, Salmon-Trinity Alps 2286 Comment
  CAS-BOT-BC118714  Carex proposita John Thomas Howell 1950-7-16 26983 Tulare Talus in gorge north of Bakeoven Meadows, South Fork of Kern River. 2499 Comment
  UCD140776  Carex raynoldsii John Thomas Howell 1961-6-20 36557 Shasta Lassen Volcanic National Park, Dersch Meadows. 1981 Comment
  CAS-BOT-BC118018  Carex rossii John Thomas Howell 1946-7-24 22698 Inyo Mono Mesa 3657 Comment
  CAS-BOT-BC118192  Carex rossii John Thomas Howell; Gordon H. True 1970-6-24 46706 Tulare North Manther Creek, Big Meadow to Manter Meadow, Kern Plateau 2438 Comment
  SD71018  Carex rossii John Thomas Howell 1960-8-18 36035 Tehama Near Lassen Volcanic National Park; Bluff Falls. 1981 Comment
  CAS-BOT-BC118043  Carex rossii John Thomas Howell 1938-8-8 14431 Mono Mammouth Lakes Basin Comment
  CAS-BOT-BC118135  Carex rossii John Thomas Howell; R. C. Barneby 1954-5-14 29556 Plumas 2 mi E of Blairsdan 1493 Comment
  RSA0079805  Carex rossii John Thomas Howell 1960-7-17 35490 Plumas Drakesbad. Lassen Volcanic National Park. 1677 Comment
  RSA0079910  Carex rossii John Thomas Howell 1948-7-28 25081 Tulare Center Basin. 3657 Comment
  SD112274  Carex sartwelliana Darley F. Howe 1941-6-8 1293 Riverside San Jacinto Mountains, Strawberry Creek. Comment
Read comments
Aug 21 2007
  SD43381  Carex scopulorum Darley F. Howe 1947-3-22 Los Angeles Topango Canyon; stream bed Comment
  CAS-BOT-BC117175  Carex spectabilis John Thomas Howell 1946-7-20 s.n. Fresno Mono Rock 3352 Comment
  SEINET12882914 Image available Carex spectabilis J. T. Howell 1939-1 15226 Unknown Comment
  CAS-BOT-BC116965  Carex straminiformis John Thomas Howell 1942-8-2 17591 Tulare Little Five Lakes Basin. Comment
  RSA38527  Carex straminiformis J. T. Howell 1948-7-28 25125 Tulare Center Basin. 3659 Comment
  SD72076  Carex subbracteata John Thomas Howell 1957-5-28 32516 San Francisco Northwest side of Lone Mountain. Comment
  CAS-BOT-BC115813  Carex subfusca John Thomas Howell 1936-8-27 12850 Trinity Near Trinity Center. Comment
  CAS-BOT-BC115877  Carex subfusca John Thomas Howell 1960-8-23 36451 Shasta Lassen Loop east of Diamond Peak 2255 Comment
  CAS-BOT-BC116554  Carex subfusca John Thomas Howell; Gordon H. True 1968-6-9 44517 Placer Alta. 1066 Comment
  CAS-BOT-BC116584  Carex subfusca John Thomas Howell 1955-7-8 30629 Monterey Santa Lucia Camp, Arroyo Seco River. 609 Comment
  SD112257  Carex subfusca Darley F. Howe 1962-5-31 3322 San Diego West side of Cuyamaca Middle Peak. 1524 Comment
  SD112262  Carex subfusca Darley F. Howe 1941-6-9 1291 Riverside San Jacinto Mountains; Strawberry Creek. Comment
  CAS-BOT-BC9376  Carex subnigricans John Thomas Howell 1949-8-5 26040 Tulare Army Pass 3657 Comment
  CAS-BOT-BC115687  Carex tompkinsii John Thomas Howell 1972-4-25 48719 Mariposa Merced River Canyon, 1 mi from Arch Rock on road to Cascade Falls. 914 Comment
  SEINET7578149 Image available Carex tompkinsii John Thomas Howell 1958-7-28 34068 Fresno Sierra Nevada, trail between Simpson Meadow, Middle Fork of the Kings River. 1676 Comment
  CAS-BOT-BC115589  Carex tumulicola John Thomas Howell 1946-6-9 21995 Marin Near Inverness Comment
  UC904998  Carex tumulicola John Thomas Howell 1943-5-2 17929 A Marin Big Carson Canyon Comment
  SEINET7578975 Image available Carex tumulicola John Thomas Howell 1937-5-23 13011 Unknown Presidio, San Francisco. Comment
  CAS-BOT-BC115479  Carex utriculata John Thomas Howell; Gordon H. True 1970-7-28 47005 Tulare West side of Big Meadow just S of Pipe Spring. 2377 Comment
  CAS-BOT-BC115497  Carex utriculata John Thomas Howell 1944-8-17 20676 Tuolumne Soda Springs Comment
  CAS-BOT-BC115186  Carex vernacula John Thomas Howell 1934-6-14 12165 Modoc Near Lost Lake, Warner Mts. 2438 Comment
  RSA38507  Carex vernacula J. T. Howell 1948-7-28 25083 Tulare Center Basin. 3659 Comment
  CAS-BOT-BC115202  Carex vernacula John Thomas Howell 1948-7-28 25083 Fresno Center Basin. 3657 Comment
  JEPS59029  Carlquistia muirii John Thomas Howell 1958-7-20 33679 Fresno Copper Creek Canyon Sierra Nevada 2072 Comment
  CAS-BOT-BC230241  Carpobrotus edulis John Thomas Howell 1956-10-21 31919 San Francisco N slope of Bayview Hills Comment
  RSA44183  Cassiope mertensiana subsp. californica J. T. Howell 1947-8-7 23854 Inyo West of Sixth Lake, Big Pine Lakes. 3415 Comment
  CAS-BOT-BC32515  Castilleja adenophora John Thomas Howell 1941-7-22 16400 Inyo Mono Pass Trail 3352 Comment
  CAS-BOT-BC249091  Castilleja affinis John Thomas Howell 1926-4-11 1839 Alameda Slope of Cedar Mt. above Rancho Repose Comment
  JEPS58949  Castilleja affinis subsp. affinis John Thomas Howell 1946-5-16 21864 Marin Angel Island, se side Marin County Angel Island Comment
  JEPS58916  Castilleja ambigua subsp. ambigua John Thomas Howell 1946-5-25 21940 Marin Greenbrae Marshes Comment
  UCR88754  Castilleja applegatei J. T. Howell, G. H. True 1968-5-13 44288 Tulare Kern Plateau, North Meadow Creek 2043 Comment
  CAS-BOT-BC249352  Castilleja applegatei John Thomas Howell; Gordon H. True 1967-5-29 42310 Inyo Unspecified 1828 Comment
  UCD122240  Castilleja applegatei subsp. disticha John Thomas Howell 1958-8-11 34298 Madera East Fork of Granite Creek, near Joe Crane Creek. 2438 Comment
  CAS-BOT-BC249484  Castilleja applegatei subsp. pallida John Thomas Howell 1941-7-31 16607 Madera Ridge nw. of San Joaquin Mt. Comment
  GH365461  Castilleja applegatei subsp. pinetorum J. T. Howell 1943-8-6 19114 Unknown Black Butte Comment
  CAS-BOT-BC243733  Castilleja applegatei var. pinetorum John Thomas Howell 1960-8-19 36181 Shasta Summit ridge, Brokeoff Mt., Lassen Volcanic National Park 2773 Comment
  JEPS58942  Castilleja attenuata John Thomas Howell 1943-4-11 17917 Marin Black Canyon San Rafael Hills Comment
  SDSU10544  Castilleja chromosa D. F. Howe 1961-4-26 3020 Inyo 1.5 miles E of west entrance to Inyo National Forest on Watergard Pass Rd. 1829 Comment
  GH56145  Castilleja howellii J. T. Howell 1941-8-8 16884 Unknown Agnew Pass Comment
  CAS-BOT-BC241375  Castilleja latifolia John Thomas Howell 1963-9-4 40335 Monterey Moss Landing Comment
  CAS-BOT-BC243841  Castilleja latifolia John Thomas Howell 1933-4-9 10969 San Mateo Coastal hillside between Pescadero and Pigeon Pt. Comment
  CAS-BOT-BC243858  Castilleja latifolia John Thomas Howell 1930-7-27 5412 Sonoma 4 miles north of Bodega Bay Comment
  CAS-BOT-BC251419  Castilleja lemmonii John Thomas Howell 1940-8-9 16091 Fresno Bullfrog Lake Comment
  SD64365  Castilleja linariifolia Darley F. Howe 1966-8-17 Inyo Big Pine Creek 2408 Comment
  SDSU10568  Castilleja mendocinensis D. F. Howe 1962-5-24 3315 Mendocino Seabluff, Ft. Bragg. Comment
Read comments
Oct 25 2011
  SD114369  Castilleja mollis Darley F. Howe 1963-5-18 3718 San Luis Obispo Sand dunes, Lake Oso Flaco Comment
  CAS-BOT-BC241037  Castilleja pilosa John Thomas Howell 1951-6-28 27696 Plumas Eureka Peak 1981 Comment
  CAS-BOT-BC241087  Castilleja schizotricha John Thomas Howell 1939-8-4 15043 Siskiyou Marble Rim, Marble Mts. 1889 Comment
  POM202854  Castilleja wightii J. T. Howell 1934-3-3 11735 Sonoma Bodega Bay. Comment
  RSA66820  Caulanthus cooperi J. T. Howell 1930-5-13 4952 Kern Red Rock Canyon Comment
  SD104892  Ceanothus cordulatus Darley Howe 1979-6-26 Siskiyou Road 1 mi. N of Ca. Hwy 89, 3 mi. E of McCloud 945 Comment
Read comments
Mar 5 2015
  CAS-BOT-BC48814  Ceanothus cuneatus John Thomas Howell 1962-6-15 37447 Butte Magalia 731 Comment
  SD42001  Ceanothus cuneatus D. F. Howe 1947-5-4 1569 Los Angeles Mint Canyon, dry hillside Comment
  SEINET12210971  Ceanothus cuneatus M. P. Howe 1984-1 12 Butte Doe Mill Summit 579 Comment
  CAS-BOT-BC48408  Ceanothus cuneatus var. cuneatus John Thomas Howell 1939-6-16 14766 Santa Cruz Ben Lomond Comment
  CAS-BOT-BC49701  Ceanothus cuneatus var. rigidus John Thomas Howell 1931-5-22 6501 Monterey 2 miles from Del Monte on road to Santa Cruz Comment
  SD88418  Ceanothus dentatus D. F. Howe 1972-4-25 4808 Santa Cruz Near Hecker Pass, Santa Cruz Mountains Comment
  CAS-BOT-BC64441  Ceanothus divergens John Thomas Howell 1941-6-21 16320 Napa Hills sw. of St. Helena. Comment
  SBBG27216  Ceanothus ferrisiae J. T. Howell 1937-5-20 Santa Clara Coyote Crk, ca. 3 mi E of Madrone Comment
  CAS-BOT-BC50004  Ceanothus gloriosus John Thomas Howell 1935-5-5 12614 Sonoma 6 miles from Santa Rosa on road to Sonoma Comment
  RSA518956  Ceanothus greggii var. vestitus J. T. Howell 1958-5-26 33446 Inyo [Unspecified] 2043 Comment
  A349630  Ceanothus integerrimus J. T. Howell 1940-6-29 15587 Unknown Between Cobb Mt. and Middletown Comment
  SD51224  Ceanothus integerrimus var. macrothyrsus Darley F. Howe 1960-9-20 2985 Plumas North Fork of Feather River, 41 miles from Oroville 609 Comment
  SD114016  Ceanothus leucodermis Darley F. Howe 1936-4-26 316 San Diego Campo Comment
  CAS-BOT-BC50492  Ceanothus oliganthus John Thomas Howell 1930-5-18 5173 Los Angeles Pacoima Canyon, San Gabriel Mountains Comment
  CAS-BOT-BC51587  Ceanothus oliganthus var. sorediatus John Thomas Howell 1931-3-22 5947 San Luis Obispo at summit of Cuesta Pass Comment
  SDSU10311  Ceanothus papillosus var. roweanus D. F. Howe 1951-4-28 2085 Monterey Santa Lucia Mtns. 762 Comment
  CAS-BOT-BC53193  Ceanothus parvifolius John Thomas Howell 1960-6-5 35299 Fresno Sierra Nevada - 1.2 mi. n. of Cherry Gap 1981 Comment
  CAS-BOT-BC53127  Ceanothus parvifolius John Thomas Howell 1954-6-5 29931 Tuolumne 4 miles sw. of Strawberry Comment
  CAS-BOT-BC51958  Ceanothus pinetorum John Thomas Howell 1950-7-21 27154 Tulare Monache Mt. 2590 Comment
  CAS-BOT-BC52058  Ceanothus prostratus John Thomas Howell 1975-7-22 51356 Plumas 2 miles Northwest of Spring Garden 1173 Comment
  A425174  Ceanothus ramulosus J. T. Howell 1938-6-19 13927 Unknown Rattlesnake, Mt. Tamalpais Comment
  RSA77338  Ceanothus sonomensis J. T. Howell 1935-5-5 12609 Sonoma Slopes of Triniti Mountain, 2 miles E of Glen Ellen Comment
  SD98830  Ceanothus thyrsiflorus D. F. Howe 1977-5-16 4940 San Luis Obispo Near mouth of Arroyo de la Cruz, south side Comment
  CAS-BOT-BC63118  Ceanothus vestitus John Thomas Howell; Gordon H. True 1969-5-13 45696 Tulare 2 mi. s. of Lamont Madow near summit of Spanish Needle Creek rd. 1645 Comment
  UCR139454  Ceanothus vestitus J. T. Howell 1947-8-16 24163 Inyo Sierra Nevada Mtns., Big Pine Lakes Trail 2744 Comment
  RSA80419  Celtis reticulata D. F. Howe 1953-5-24 s.n. San Diego Thing Valley, east base of Laguna Mts. Comment
  CAS-BOT-BC276970  Centaurea calcitrapa John Thomas Howell 1925-11-26 1562 Solano Near Lake Chabot Comment
  CAS-BOT-BC272077  Centaurea cyanus John Thomas Howell 1963-7-10 39722 Alpine Markleeville, Sierra Nevada 1676 Comment
  CAS-BOT-BC277009  Centaurea diluta John Thomas Howell 1956-8-19 31782 San Francisco San Francisco. Third St. near Paul Ave. Comment
  CAS-BOT-BC288541  Centromadia fitchii John Thomas Howell 1955-8-24 30904 Contra Costa Mt Diablo near Turtle Rock 259 Comment
  SD50717  Centromadia fitchii Darley F. Howe 1959-8-1 2770 Placer 2.0 miles north of Auburn. 455 Comment
  UCD130200  Centromadia pungens John Thomas Howell 1967-11-3 44059 Tulare near north fence, about 4.5 miles ENE of Pixley, Valley Grassland. 83 Comment
  CAS-BOT-BC279585  Centromadia pungens subsp. pungens John Thomas Howell 1970-9-25 47472 Kern Lake Isabella (east side of north arm), about 5 miles south of Kernville 792 Comment
  SDSU4605  Centromadia pungens subsp. pungens D. F. Howe 1962-8-8 3416 Sacramento Jefferson Blvd. south of Sacramento. Comment
  CAS-BOT-BC388204  Cerastium fontanum subsp. vulgare John Thomas Howell 1976-7-15 51829 Plumas Quincy 1051 Comment
  CAS-BOT-BC388267  Cerastium glomeratum John Thomas Howell; Gordon H. True 1969-4-8 45488 Butte Paradise 518 Comment
  CAS-BOT-BC400218  Ceratophyllum demersum John Thomas Howell 1926-11-7 2245 San Francisco Lake Merced, San Francisco Comment
  CAS-BOT-BC207386  Cercis occidentalis John Thomas Howell 1929-3-29 4108 Merced Merced River bottom at Hopeton Bridge. 60 Comment
  CAS-BOT-BC148495  Cercocarpus ledifolius var. ledifolius John Thomas Howell 1928-6-15 3931 Inyo Upper part of Surprise Canyon, Panamint Mts. 2346 Comment
  CAS-BOT-BC279506  Chaenactis artemisiifolia John Thomas Howell 1928-4-22 3752 Ventura At. Pt. Mugu Comment
  CAS-BOT-BC284565  Chaenactis glabriuscula var. heterocarpha John Thomas Howell 1943-5-11 18064 Lake 2.9 miles north of Middletown Comment
  CAS-BOT-BC284282  Chaenactis santolinoides John Thomas Howell; Gordon H. True 1970-6-26 46881 Tulare 1 mile south of Dry Lake on Cherry Hill Road, Kern Plateau, Sierra Nevada Comment
  CAS-BOT-BC279555  Chaenactis stevioides John Thomas Howell 1928-3-31 3573 San Bernardino 20 miles east of Daggett on Arrowhead Trail, Mojave Desert Comment
  CAS-BOT-BC284309  Chaenactis stevioides John Thomas Howell; Gordon H. True 1969-5-13 45669 Kern Spanish Needle Creek Road to Lamont Meadow, Sierra Nevada 1371 Comment
  CAS-BOT-BC279744  Chaenactis xantiana John Thomas Howell; Gordon H. True 1967-7-5 43059 Tulare 6.4 miles north of Chimney Meadow, Kern Plateau 2225 Comment
  CAS-BOT-BC279672  Chaenactis xantiana John Thomas Howell 1976-5-18 51756 Kern 2.6 miles from Wofford, along old road from Alta Sierra to Wofford. Greenhorn Mountains Comment
  SDSU7125  Chaenactis xantiana D. F. Howe 1971-6-26 4745 Mono 12.4 miles north of Mono-Inyo Co. line on #6. 1463 Comment
  RSA98037  Chamaesyce prostrata J. T. Howell 1952-10-26 s.n. San Bernardino Garden weed. Comment
  CAS-BOT-BC66349  Cheilanthes covillei John Thomas Howell 1970-5-10 46522 Marin in crevice of Fern Rock, on Old Stage Road above Bootjack, Mt. Tamalpais Comment
  CAS-BOT-BC68275  Cheilanthes gracillima John Thomas Howell 1945-6-20 21115 Lake Pinnacle Rock, Bartlett Mountain Comment
  CAS-BOT-BC70272  Cheilanthes intertexta John Thomas Howell 1958-7-23 33790 Fresno Simpson meadow, Middle Fork of the Kings River 1828 Comment
  CAS-BOT-BC426342  Chenopodium John Thomas Howell 1975-7-23 51389 Lassen Susanville, south edge of town on highway to Janesville 1295 Comment
  CAS-BOT-BC426307  Chenopodium atrovirens John Thomas Howell 1947-7-24 23575 San Bernardino San Bernardino Mts.: Santa Ana River 1920 Comment
  CDA3029  Chenopodium berlandieri var. zschackei J. T. Howell 1957-6-16 32664 San Francisco Central Western; San Francisco Bay Area region; Third and Davidson streets, San Francisco. 0 Comment
  POM203791  Chenopodium pratericola J. T. Howell 1934-7-8 12499 Lassen Spalding s, Eagle Lake. Comment
  CAS-BOT-BC451433  Chimaphila menziesii John Thomas Howell 1937-7-22 13295 Siskiyou South Fork of Salmon River near Big Flat 1524 Comment
  CAS-BOT-BC452258  Chimaphila umbellata John Thomas Howell 1937-7-26 13559 Siskiyou Caribou Gulch Comment
  SD81290  Chlorogalum pomeridianum var. divaricatum Darley F. Howe 1969-5-26 4574 1 Marin North part of Point Reyes. Comment
  CAS-BOT-BC246320  Chloropyron maritimum subsp. palustre John Thomas Howell 1945-8-5 21370 Marin Stinson Beach Comment
  SDSU4934  Chorizanthe angustifolia D. F. Howe 1963-6-30 3587 San Luis Obispo Hillside S of Morro Bay. 122 Comment
  SD56800  Chorizanthe angustifolia Darley F. Howe 1963-5-18 3493 San Luis Obispo 11.7 mi. south of Pismo Beach on # 1. Comment
  RSA137070  Chorizanthe clevelandii J. T. Howell 1955-7-8 30598 Monterey 2 miles from San Antonio Mission on road to Santa Lucia Camp. 335 Comment
  CAS-BOT-BC256925  Chorizanthe membranacea John Thomas Howell 1931-5-23 6520 Monterey Road to Santa Lucia Camp, 27 miles from King City, Santa Lucia Mts. Comment
  SD64315  Chorizanthe pungens D. F. Howe 1966-5-26 4240 Santa Cruz 5.3 miles east of Capitola on Hwy #1 Comment
  CAS-BOT-BC247850  Chorizanthe ventricosa John Thomas Howell 1963-6-21 39489 Monterey Mustang Grade east of San Lorenzo Creek Comment
Read comments
Jun 25 2019
  CAS-BOT-BC248042  Chorizanthe watsonii John Thomas Howell 1962-5-22 37384 Tulare 1.5 mi. east of Johnsondale 1371 Comment
  CAS-BOT-BC255366  Chorizanthe xanti var. xanti John Thomas Howell; Alice Eastwood 1937-4-29 4127 San Luis Obispo Carrizo Plain near Painted Rock 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
  CAS-BOT-BC36187  Chrysolepis sempervirens John Thomas Howell 1950-7-12 26734 Inyo Sage Flat to Olancha Pass 2743 Comment
  CAS-BOT-BC36247  Chrysolepis sempervirens John Thomas Howell 1937-7-26 13545 Siskiyou Caribou Gulch Comment
  RSA263849  Chrysothamnus nauseosus subsp. albicaulis J. T. Howell 1974-9-20 50902 Plumas Near Spring Garden 1159 Comment
  SDSU6313  Chrysothamnus viscidiflorus subsp. puberulus D. F. Howe 1960-9-16 2968 Mono 18.5 miles north of Bishop. 1920 Comment
  CAS-BOT-BC100795  Chrysothamnus viscidiflorus subsp. viscidiflorus John Thomas Howell 1947-8-13 24040 Inyo Black Lake Trail, Big Pine Lakes 3200 Comment
  UCD130464  Chrysothamnus viscidiflorus subsp. viscidiflorus John Thomas Howell 1963-8-21 40218 Inyo Whitney Portal Road. 2255 Comment
  CAS-BOT-BC162752  Chylismia claviformis subsp. claviformis John Thomas Howell 1950-7-12 26684 Inyo Sage Flat to Olancha Pass 1981 Comment
  CAS-BOT-BC279852  Cichorium intybus John Thomas Howell; Gordon H. True 1967-9-18 43808 Tulare Northeast end of Long Valley. Kern Plateau 2011 Comment
  CAS-BOT-BC190007  Cinna latifolia John Thomas Howell 1939-8-6 15094 Siskiyou Marble Mountains. Spirit Lake. 1828 Comment
  SD114078  Circaea alpina subsp. pacifica Darley F. Howe 1939-7-24 937 Mariposa Oak Flat Road Comment
  JEPS28955  Cirsium andersonii John Thomas Howell 1962-7-10 38513 Kern Sierra Nevada, Greenhorn Mountains, Summit of Cooks Peak 2103 Comment
  POM226231  Cirsium andrewsii J. T. Howell 1933-7-9 11424 San Francisco Lake Merced Comment
  CAS-BOT-BC105816  Cirsium arizonicum John Thomas Howell 1947-8-9 23948 Inyo Big Pine Lakes, Fifth Lake 3352 Comment
  CAS-BOT-BC277979  Cirsium cymosum John Thomas Howell; Gordon H. True 1971-6-17 48019 Kern 0.5 mile east of Bodfish Gap 1219 Comment
  CAS-BOT-BC278045  Cirsium cymosum John Thomas Howell 1952-6-15 28361 Siskiyou Just east of Montague Comment
  CAS-BOT-BC279964  Cirsium douglasii var. douglasii John Thomas Howell 1947-6-18 23286 Marin North of Dillons Beach Comment
  CAS-BOT-BC100934  Cirsium fontinale var. campylon John Thomas Howell 1937-7-5 13094 Santa Clara Metcalf Road in hills east of Coyote Comment
  CAS-BOT-BC285482  Cirsium occidentale var. californicum John Thomas Howell 1954-6-5 29939 Tuolumne Near Dardanelle, Middle Fork Stanislaus River 1828 Comment
  RSA821  Cirsium occidentale var. californicum J. T. Howell 1927-6-26 212 Orange Claymine Canon near Sierra Peak. [canyon] 244 Comment
  CAS-BOT-BC100984  Cirsium occidentale var. compactum John Thomas Howell 1961-4-13 s.n. San Luis Obispo flats just north of Cambria 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-BC285692  Cirsium occidentale var. occidentale John Thomas Howell 1931-4-12 6280 Santa Barbara Cochie Canyon, Santa Cruz Island Comment
  CAS-BOT-BC280129  Cirsium occidentale var. venustum John Thomas Howell 1933-7-2 11418 San Luis Obispo Paso Robles Comment
  CAS-BOT-BC292689  Cirsium occidentale var. venustum John Thomas Howell 1945-6-21 21179 Lake Sawmill Flat to Ruppert Ridge, Bartlett Mountain Comment
  CAS-BOT-BC280136  Cirsium occidentale var. venustum John Thomas Howell 1939-6-16 14747 San Mateo Kings Mt. Comment
  CAS-BOT-BC286389  Cirsium occidentale var. venustum John Thomas Howell 1958-5-28 33564 Inyo Bishop Creek 1828 Comment
  CAS-BOT-BC280539  Cirsium quercetorum John Thomas Howell 1938-7-3 13953 Sonoma Stony Point Comment
  UC1177342  Cirsium quercetorum John Thomas Howell 1953-6-15 29100 Monterey 20 mi from Greenfield (on road to Carmel); Santa Lucia Mountains Comment
  CAS-BOT-BC288746  Cirsium remotifolium John Thomas Howell 1939-6-25 14796 Marin Summit Avenue, Mill Valley Comment
  CAS-BOT-BC286479  Cirsium scariosum John Thomas Howell 1960-8-18 36087 Tehama Lassen Volcanic National Park. Sulphur Works entrance station 2011 Comment
  CAS-BOT-BC286359  Cirsium scariosum John Thomas Howell 1951-6-29 27736 Plumas Near Spring Garden 1219 Comment
  CAS-BOT-BC438933  Cistanthe monandra John Thomas Howell; Gordon H. True 1968-5-12 44237 Tulare Brush Creek Canyon. Kern Plateau 1402 Comment
  CAS-BOT-BC438773  Cistanthe monandra John Thomas Howell 1955-5-21 30247 Monterey Cachagua Creek, Santa Lucia Mts. Comment
  CAS-BOT-BC228945  Cistanthe umbellata John Thomas Howell; Gordon H. True 1970-7-14 5519 Sierra At Verdi Peak Lookout, Verdi Range 2560 Comment
  CAS-BOT-BC233919  Cistanthe umbellata John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49204 Lassen Elysian Valley northwest of Janesville, Sierra Nevada 1325 Comment
  SDSU8635  Clarkia bottae D. F. Howe 1949-5-29 1983 Los Angeles Santa Monica Mts. 274 Comment
  CAS-BOT-BC172181  Clarkia concinna John Thomas Howell 1929-5-30 4279 Napa Between Chiles and Pope Valleys, Napa Range Comment
  SD53095  Clarkia concinna Darley F. Howe 1962-5-20 3255 Mendocino 9.1 miles North of Willits on #101. 366 Comment
  CAS-BOT-BC163879  Clarkia purpurea subsp. quadrivulnera John Thomas Howell 1957-4-30 32130 San Benito 5.3 miles sw. of Bitterwater 365 Comment
  POM191530  Clarkia purpurea subsp. quadrivulnera J. T. Howell 1928-6-10 3875 Los Angeles Monrovia Canyon, San Gabriel Mtns. Comment
  CAS-BOT-BC165076  Clarkia rubicunda John Thomas Howell 1946-6-23 s.n. Marin Near Fairfax Country Club (Meadow Club) Comment
  SD88531  Clarkia rubicunda Darley F. Howe 1972-6-25 San Mateo Ocean bluff, 7.5 miles North of Half Moon Bay Comment
  SD53170  Clarkia unguiculata Darley F. Howe 1962-5-26 San Benito 1.3 miles North of Paicines on #25. 244 Comment
  CAS-BOT-BC165775  Clarkia williamsonii John Thomas Howell 1954-5-19 29893 Mariposa 4 miles northwest of Bagby Comment
  SD69945  Clarkia williamsonii Darley F. Howe 1968-6-2 Mariposa 16.2 miles South of Mariposa on Route 49 1067 Comment
  CAS-BOT-BC439107  Claytonia cordifolia John Thomas Howell 1939-8-3 15012 Siskiyou Spirit Lake, Marble Mts. 1828 Comment
  SDSU9780  Claytonia exigua subsp. exigua D. F. Howe 1963-5-23 3532 Sonoma 4 miles north of Cloverdale on #128. 335 Comment
  RSA0059502  Claytonia gypsophiloides J. T. Howell 1945-4-29 20795 Marin Serpentine ridge W of Camp Handy, Mt. Tamalpais Comment
  CAS-BOT-BC439572  Claytonia parviflora subsp. parviflora John Thomas Howell 1957-5-29 32544 San Francisco San Francisco. North side of Lone Mt. Comment
  CAS-BOT-BC439894  Claytonia perfoliata John Thomas Howell; Gordon H. True 1968-5-13 44266 Tulare North Meadow Creek, Kern Plateau. 1981 Comment
  CAS-BOT-BC440082  Claytonia perfoliata subsp. perfoliata John Thomas Howell 1931-3-18 5856 Fresno At head of Oil Canyon Comment
  CAS-BOT-BC440105  Claytonia perfoliata subsp. perfoliata John Thomas Howell 1962-7-8 38273 Kern South side of Black Mt., Greenhorn Mountains 1432 Comment
  CAS-BOT-BC443690  Claytonia perfoliata subsp. perfoliata John Thomas Howell; Gordon H. True 1970-6-26 46833 Tulare True Meadow, Kern Plateau. 2225 Comment
  CAS-BOT-BC443779  Claytonia rubra subsp. rubra John Thomas Howell 1976-4-28 51611 Lake Between Elk Mt. & Lake Pillsbury 792 Comment
  SD113805  Clematis lasiantha Darley F. Howe 1947-3-22 1512 Los Angeles Las Flores Canyon, Malibu Mts. Comment
  CAS-BOT-BC240916  Collinsia multicolor John Thomas Howell 1957-5-17 32285 San Francisco San Francisco. Bayview Hills Comment
  CAS-BOT-BC240949  Collinsia parryi John Thomas Howell 1928-5-6 3780 Los Angeles On trail to Madrono [Madrono] Flats, E. Fork of Santa Anita Canon [Canyon], San Gabriel Mts. Comment
  POM303694  Collinsia rattanii J. T. Howell 1944-7-17 19833 Glenn Canyon of Snow Basin Creek Comment
  UC702915  Collomia linearis John Thomas Howell 1942-7-26 17201 Tulare Mineral King Comment
  UC648287  Collomia tinctoria John Thomas Howell 1939-8-9 15239 Siskiyou Shackleford Creek Trail Marble Mts. Comment
  CAS-BOT-BC285965  Conyza bonariensis John Thomas Howell 1972-8-17 s.n. Monterey Pacific Grove Comment
  CAS-BOT-BC288939  Conyza canadensis John Thomas Howell; Gordon H. True 1967-7-6 43215 Tulare About 4.5 miles ENE of Pixley, from northern 1/3 of area 83 Comment
  CAS-BOT-BC288966  Conyza floribunda John Thomas Howell 1975-9-25 51508 San Mateo At summit, San Bruno Mt 396 Comment
  CAS-BOT-BC237939  Cordylanthus eremicus subsp. kernensis John Thomas Howell 1950-7-12 26666 Inyo Sage Flat to Olancha Pass 2133 Comment
  RSA289996  Cordylanthus eremicus subsp. kernensis J. T. Howell 1950-7-22 27169 Tulare Olancha Peak 2896 Comment
Read comments
Nov 29 2011
  POM203970  Cordylanthus maritimus subsp. palustris J. T. Howell 1933-7-30 11480 Marin Inverness. Comment
  RSA82046  Cordylanthus mollis subsp. mollis J. T. Howell 1945-7-8 21277 Marin Burdell Station Comment
  JEPS41342  Cordylanthus rigidus subsp. rigidus John Thomas Howell 1962-9-24 38855 Kern near Tiger Flat; Sierra Nevada, Greenhorn Mountains 1981 Comment
  JEPS6777  Cordylanthus rigidus subsp. setiger John Thomas Howell 1927-6-26 2599 Orange Claymine Canyon Santa Ana Mts 365 Comment
  CAS-BOT-BC289017  Coreopsis bigelovii John Thomas Howell; Gordon H. True 1967-5-29 42279 Inyo 1/3 mile E of head on Nine Mile Canyon 1828 Comment
  CAS-BOT-BC101157  Corethrogyne filaginifolia John Thomas Howell 1930-8-3 5431 Monterey Seventeen Mile Drive, Pacific Grove Comment
  CAS-BOT-BC105656  Corethrogyne filaginifolia John Thomas Howell 1944-5-14 19454 Marin Pt. Reyes Station Comment
  CAS-BOT-BC105797  Corethrogyne filaginifolia John Thomas Howell 1962-9-25 38871 Kern Kernville - Sierra Nevada 807 Comment
  RSA128946  Corethrogyne filaginifolia var. californica J. T. Howell 1939-6-18 14767 Marin Near Mud Lake Comment
  SD37168  Corethrogyne filaginifolia var. filaginifolia Darley F. Howe 1941-8-4 San Bernardino San Bernardino Mountains, Strawberry Peak. Comment
  CAS-BOT-BC212208  Cornus sericea John Thomas Howell; Gordon H. True 1973-7-31 50043 Lassen On road from Janesville to Thompson Peak, Diamond Range, Sierra Nevada 1783 Comment
  CAS-BOT-BC210268  Cornus sericea John Thomas Howell 1934-6-11 11964 Modoc Parker Creek, Warner Mts. 1584 Comment
  CAS-BOT-BC290334  Crepis John Thomas Howell 1954-6-6 29962 Tuolumne Twain Harte 1127 Comment
  SD51414  Crepis acuminata Darley F. Howe 1961-6-18 Inyo 0.7 mile from Westgard Pass on road to Big Pine, White Mountains. 2165 Comment
  SDSU3883  Crepis acuminata D. F. Howe 1946-8-3 1471 San Bernardino Sugarloaf trail from Rathbone Creek. 2743 Comment
  RSA88087  Crepis occidentalis subsp. conjuncta J. T. Howell 1951-6-27 27633 Plumas Jamison Creek 1829 Comment
  CAS-BOT-BC290925  Crepis vesicaria John Thomas Howell 1975-4-18 s.n. San Mateo From the home of Mrs. Hewlett Lee, Berenda Farm, Portola Valley Comment
  CAS-BOT-BC299716  Crocidium John Thomas Howell 1931-2-23 5749 Mariposa 7 miles from Coulterville Comment
  SD129874 Image available Croton setiger Melanie Howe, Charles Caldwell 1988-8-3 39 San Diego Mission Trails Regional Park, Padre Dam Comment
  CAS-BOT-BC189239  Cryptantha John Thomas Howell 1967-6-22 42615 Butte Magalia 701 Comment
  CAS-BOT-BC189438  Cryptantha circumscissa John Thomas Howell; Gordon H. True 1967-8-8 43569 Tulare Slopes SE of Long Valley on road to Lamont Meadow, Kern Plateau 1859 Comment
  CAS-BOT-BC189441  Cryptantha circumscissa John Thomas Howell; Gordon H. True 1970-7-29 47135 Tulare Pine Flat, Kern Plateau 2194 Comment
  SD113304  Cryptantha circumscissa Darley F. Howe 1946-6-2 1556 San Bernardino Highway between Adelanto & Hesperia, Mojave Desert Comment
  CAS-BOT-BC218889  Cryptantha circumscissa subsp. rosulata John Thomas Howell 1949-7-18 25471 Inyo Cottonwood Lakes 3413 Comment
  CAS-BOT-BC218891  Cryptantha circumscissa subsp. rosulata John Thomas Howell 1950-7-22 27234 Tulare Summit ridge, Olancha Peak 3698 Comment
  RSA640  Cryptantha clevelandii J. T. Howell 1928-2-25 837 Orange Near Bee Canyon, Rancho Santa Ana. 152 Comment
  CAS-BOT-BC216349  Cryptantha glomeriflora John Thomas Howell 1946-7-14 22264 Inyo Mosquito Flat, Rock Creek Lake Basin 3139 Comment
  CAS-BOT-BC218786  Cryptantha glomeriflora John Thomas Howell 1949-8-11 26214 Tulare Rock Creek 3200 Comment
  CAS-BOT-BC218790  Cryptantha glomeriflora John Thomas Howell 1942-8-7 17771 A Tulare Lost Canyon 3048 Comment
  UC909666  Cryptantha glomeriflora John Thomas Howell 1950-7-24 27301 Tulare Monache Creek, South Fork Sierra Nevada, Monache Creek, South Fork 2987 Comment
  UCR88936  Cryptantha incana J. T. Howell, G. H. True 1971-7-13 48344 Tulare Sierra Nevada Mtns, Pine Flat. Kern Plateau. 2195 Comment
  POM196471  Cryptantha leiocarpa J. T. Howell 1926-7-13 2066 San Francisco Lone Mt., San Francisco. Comment
Read comments
Sep 7 2010
  UC857280  Cryptantha torreyana John Thomas Howell 1937-7-29 13655 Siskiyou between Trinity and Siskiyou County; Scott Mountain Comment
  CAS-BOT-BC70491  Cryptogramma acrostichoides John Thomas Howell 1951-7-21 28095 Tulare White Chief region 3200 Comment
  CAS-BOT-BC85627  Cupressus arizonica John Thomas Howell; Gordon H. True 1971-6-17 48053 Kern Sierra Nevada - Bodfish Grove of Piute Cypress, 2 miles east of Bodfish Gap 1432 Comment
  RSA988  Cupressus forbesii J. T. Howell 1927-8-10 221 Orange Claymine Canon, near Sierra Peak. 365 Comment
  CAS-BOT-BC224593  Cuscuta californica var. papillosa John Thomas Howell 1933-8-17 11539 San Benito 4 miles n. of the Pinnacles Comment
  RSA94092  Cuscuta campestris J. T. Howell 1946-8-17 22851 Sonoma The Laguna north of Sebastopol Comment
  UC1042318  Cuscuta obtusiflora var. glandulosa John Thomas Howell 1946-8-17 22851 Sonoma n of Sebastopol; The Laguna Comment
  UC710535  Cuscuta occidentalis John Thomas Howell 1943-8-12 19307 Glenn Canyon of Snow Basin Creek Comment
  SD113437  Cylindropuntia ganderi var. ganderi Darley F. Howe 1955-4-15 2474 San Diego Campbell Ranch, north of Vallecito Stagecoach Station. (IPB 7/07) Comment
  JEPS88622  Cynara cardunculus subsp. cardunculus John Thomas Howell 1956-11-14 31961 San Mateo Bayshore Highway just south of Main Street, Redwood City Comment
  RSA47  Cynodon dactylon J. T. Howell 1927-7-27 488 Orange Santa Ana River, Rancho Santa Ana. 152 Comment
  CAS-BOT-BC114570  Cyperus eragrostis John Thomas Howell 1976-10-29 52304 El Dorado Along the course of Sweetwater Creek below the high-water line of Folsom Lake. 121 Comment
  CAS-BOT-BC114669  Cyperus eragrostis John Thomas Howell 1963-6-21 39438 Monterey Along Highway US 101, Prunedale. Comment
  CAS-BOT-BC70670  Cystopteris fragilis John Thomas Howell; Gordon H. True 1969-6-23 45831 Plumas Middle Fork of Feather River at Nelson Point 1249 Comment
  SD104898  Dactylis glomerata Darley Howe 1979-6-22 Mendocino 17.5 miles southwest of Ukiah on Route 253 853 Comment
  CAS-BOT-BC189726  Danthonia californica John Thomas Howell 1943-5-9 17966 Marin San Rafael Hills. Comment
  CAS-BOT-BC192254  Danthonia californica John Thomas Howell 1937-7-1 13456 Siskiyou Caribou Basin, Salmon-Trinity Alps 2286 Comment
  UCD61296  Danthonia unispicata John Thomas Howell 1942-8-5 17701 Tulare Between Big Arroyo and Chagoopa Plateau. Comment
  SEINET10893609  Danthonia unispicata John Thomas Howell 1944-8-6 Howell 20023 Tuolumne Tuolumne Meadows. Comment
  SD50777  Daucus carota Darley F. Howe 1959-8-4 2805 Humboldt 9 miles east of Arcata on # 395 Comment
  CAS-BOT-BC293822  Deinandra fasciculata John Thomas Howell 1930-5-10 4789 Riverside 2 miles south of Perris Comment
  CAS-BOT-BC299333  Deinandra fasciculata John Thomas Howell 1931-6-1 6625 Orange San Clemente Comment
  SD112755  Deinandra fasciculata Darley F. Howe 1968-7-2 3323 San Diego San Onofre (mak 11/07) Comment
  SD53172  Deinandra increscens subsp. villosa Darley F. Howe 1962-7-21 3326 Santa Barbara 22 miles west of Goleta on Highway 101. Comment
  CAS-BOT-BC299986  Deinandra kelloggii John Thomas Howell; R. C. Barneby 1954-5-8 29212 Tulare Tule River Canyon, 5 miles above Springville, Sierra Nevada 548 Comment
  SD62046  Deinandra mohavensis Darley F. Howe 1965-8-18 4130 Kern East of mountain, east of Kernville. 1220 Comment
Read comments
May 24 2013
  CAS-BOT-BC291963  Deinandra pallida John Thomas Howell 1962-5-20 37098 a Kern 5 mi. ne. of Southern Pacific RR station in Bakersfield 213 Comment
  RSA584782  Delphinium depauperatum J. T. Howell, G. H. True 1969-6-25 45853 Sierra 3 miles N of Bassetts on road to Gold Lake. 1951 Comment
  SDSU10035  Delphinium glaucum D. F. Howe 1941-8-4 1194 Inyo Lone Pine Creek, Sierra Nevadas. Comment
  CAS-BOT-BC10174  Delphinium hansenii John Thomas Howell; Gordon H. True 1968-5-13 44342 Tulare Cherry Hill Road at Rincon Trail, Brush Creek Canyon, Kern Plateau 1463 Comment
  CAS-BOT-BC116097  Delphinium nuttallianum J. T. Howell; Gordon H. True 1967-7-11 43325 Plumas Coniferous forest about 3 miles southeast of Mt. Hough 1706 Comment
  SD113787  Delphinium parishii subsp. subglobosum Darley F. Howe 1955-5-29 2481 San Diego Desert rim of Laguna Mts. Comment
  UC990942  Delphinium parryi subsp. parryi D. F. Howe 1951-4-28 Monterey Jolon 426 Comment
  CAS-BOT-BC7769  Delphinium variegatum subsp. variegatum John Thomas Howell 1941-4-5 16175 Sonoma 1 mile S of El Verano Comment
  SDSU10058  Delphinium variegatum subsp. variegatum D. F. Howe 1948-5-21 1907 Placer 457 Comment
  CAS-BOT-BC82878  Dendromecon rigida John Thomas Howell 1962-6-15 37443 Butte Sierra Nevada. Magalia. 731 Comment
  CAS-BOT-BC192708  Deschampsia danthonioides John Thomas Howell 1970-9-25 47480 Kern East side of Lake Isabella, 5 miles s. of Kernville 792 Comment
  CAS-BOT-BC198102  Deschampsia danthonioides John Thomas Howell 1924-5-30 356 Mariposa Wawona 1219 Comment
  CAS-BOT-BC201707  Deschampsia elongata John Thomas Howell 1937-7-29 13624 Unknown Scott Mt. between Trinity & Siskiyou counties Comment
  CAS-BOT-BC253642  Dichanthelium acuminatum subsp. acuminatum John Thomas Howell 1936-8-25 12771 Trinity Near Trinity Center Comment
  CAS-BOT-BC254523  Dichanthelium acuminatum subsp. acuminatum John Thomas Howell 1961-9-22 36729 Butte Feather River, Oroville 53 Comment
  CAS-BOT-BC483268  Dichelostemma capitatum subsp. pauciflorum John Thomas Howell; Gordon H. True 1968-5-13 44302 Tulare Cherry Hill Road, Poison Meadow Creek Canyon, Kern Plateau, Sierra Nevada 2255 Comment
  CAS-BOT-BC501095  Dichelostemma multiflorum John Thomas Howell 1967-6-22 42623 Butte Magalia, Sierra Nevada 701 Comment
  SD61068  Dicoria canescens Darley F. Howe 1964-8-11 Imperial 23.1 miles east of Brawley. Comment
  UCD63943  Digitaria ischaemum John Thomas Howell 1959-9-20 34642 Butte Eastern outskirts of Oroville. 60 Comment
  CAS-BOT-BC208977  Digitaria ischaemum John Thomas Howell 1969-10-20 46466 Merced 20th & L Streets, Merced Comment
  CAS-BOT-BC34725  Digitaria sanguinalis J. T. Howell 1988-8-10 s.n. Marin Terra Linda community vegetable gardens Comment
  GH355562  Digitaria sanguinalis J. T. Howell 1943-09-04 - 1943-09-05 Unknown Mill Valley Comment
  RSA758908  Digitaria sanguinalis J. T. Howell 1989-10-16 s.n. Marin Terra Linda, Freitas Park, edge of lawn. Comment
  CAS-BOT-BC150920  Diplacus bigelovii var. bigelovii John Thomas Howell; Gordon H. True 1967-5-29 42338 Tulare Midway between Chimney and Lamont meadows, Kern Plateau 1889 Comment
  CAS-BOT-BC153471  Diplacus layneae J. T. Howell 1939-6-7 4432 Trinity About 7 1/2 mi. s.e. of Dinsmore's near Van Duzen River Comment
  CAS-BOT-BC152058  Diplacus longiflorus John Thomas Howell 1927-6-1 2401 Orange Southern Puente Hills at teh Santa Ana Canyon 152 Comment
  CAS-BOT-BC151424  Diplacus nanus John Thomas Howell 1944-7-15 19810 Glenn Canyon of Snow Basin Creek Comment
  CAS-BOT-BC151362  Diplacus tricolor John Thomas Howell 1929-5-19 s.n. Merced 8 miles ne. of Merced Comment
  CAS-BOT-BC154242  Diplacus whitneyi John Thomas Howell; Gordon H. True 1970-7-29 47136 Tulare Pine Flat. Kern Plateau 2194 Comment
  RSA223670  Dipsacus sativus J. T. Howell 1964-6-29 40820 San Luis Obispo Near St. Paul's Episcopal Church, Cambria. Comment
  CAS-BOT-BC208630  Distichlis spicata John Thomas Howell 1955-7-19 30789 Plumas Vinton - Sierra Nevada 1505 Comment
  CAS-BOT-BC208680  Distichlis spicata John Thomas Howell 1958-5-29 33616 Inyo Bishop 1264 Comment
  OBI22326  Distichlis spicata John Thomas Howell 1948-6-15 24375 San Luis Obispo San Juan River Valley 366 Comment
  UCD64627  Distichlis spicata var. stricta John Thomas Howell 1967-4-30 42112 Tulare About 4.5 miles ENE of Pixley, Valley Grassland. 83 Comment
  CAS-BOT-BC126879  Dodecatheon alpinum John Thomas Howell; Gordon H. True 1966-7-13 41947 Tulare Pipe Spring on Cherry Hill Road, west side of Big Meadow, Kern Plateau 2377 Comment
  CAS-BOT-BC126893  Dodecatheon alpinum John Thomas Howell 1940-8-2 15911 Tulare West of Reflection Lake 3505 Comment
  CAS-BOT-BC136184  Dodecatheon alpinum John Thomas Howell 1941-7-31 16548 Madera Agnew Pass Trail Comment
  SD61013  Dodecatheon alpinum subsp. majus Darley F. Howe 1964-7-31 3899 Lassen Meadow above Blue Lake, Warner Mts., Modoc National Forest 1890 Comment
  CAS-BOT-BC41990  Draba albertina John Thomas Howell 1946-7-28 22817 Inyo Rock Creek Lake Basin. Gem Lake. 3352 Comment
  CAS-BOT-BC41829  Draba breweri John Thomas Howell 1946-7-26 22718 Inyo Mono Mesa. 3657 Comment
  CAS-BOT-BC41856  Draba breweri John Thomas Howell 1948-7-28 25128 Tulare Center Basin. 3657 Comment
  UC856156  Draba lemmonii var. lemmonii John Thomas Howell 1938-8-11 14536 Tuolumne Mt. Dana 3810 Comment
  CAS-BOT-BC41329  Draba sierrae John Thomas Howell 1946-7-18 22506 Inyo South side of Mono Pass. 3627 Comment
  CAS-BOT-BC41352  Draba verna John Thomas Howell; Gordon H. True; Barbara Menzies; Roberta Shockey 1978-4-5 52809 Calaveras Sierra Nevada. Camp Nine Road, northeast of Vallecito. 609 Comment
  CAS-BOT-BC159662  Drymocallis glandulosa John Thomas Howell 1964-4-28 40560 Mariposa Just south of Mormon [Morman] Bar on road to Ben Hur - Sierra Nevada 1828 Comment
  CAS-BOT-BC159622  Drymocallis glandulosa var. glandulosa John Thomas Howell; Gordon H. True 1966-7-12 41793 Kern Bartolas Country 7.2 miles south of Cherry Hill and Cannell Meadow Roads, Kern Plateau, Sierra Nevada 2164 Comment
  CAS-BOT-BC159345  Drymocallis lactea var. lactea John Thomas Howell 1941-8-1 16658 Madera Near Garnet Lake 2956 Comment
  CAS-BOT-BC109505  Dudleya abramsii subsp. calcicola John Thomas Howell 1962-5-22 37264 Kern Sierra Nevada. Kern River Canyon, above Roads End. 1097 Comment
  SD114461  Dudleya arizonica Darley F. Howe 1951-5-24 2006 San Diego Oriflamme Canyon Comment
  CAS-BOT-BC410849  Dudleya caespitosa John Thomas Howell 1933-8-19 11601 Monterey Pt. Lobos Comment
  UC1176739  Dudleya cymosa John Thomas Howell 1943-5-22 18132 Marin Fairfax Hills Comment
  UC1176732  Dudleya farinosa John Thomas Howell 1939-7-2 14824 A Marin Elk Valley Comment
  CAS-BOT-BC109720  Dudleya saxosa subsp. saxosa John Thomas Howell 1928-6-17 4007 Inyo Surprise Canyon, Panamint Mountains. 2164 Comment
  SD114483  Dudleya viscida Darley F. Howe 1954-6-27 2417 San Diego Near mouth of San Luis Rey River on north bank just east of bridge north of Oceanside. Comment
Read comments
Jun 15 2015
  SD112655  Dysphania botrys D. F. Howe 1956-7-1 2550 Los Angeles Tujunga Can, San Gabriel Mts. 456 Comment
  SD46366  Dysphania botrys D. F. Howe 1956-7-1 Los Angeles Tujunga Canyon Comment
  CAS-BOT-BC197163  Echinochloa crus-galli John Thomas Howell 1963-8-5 39947 Monterey About 5 miles north of King City Comment
  CAS-BOT-BC197188  Echinochloa crus-galli John Thomas Howell 1956-9-29 31888 San Francisco San Francisco. Golden Gate Park east of Academy buildings Comment
  SD112626  Eclipta prostrata Darley F. Howe 1938-9-18 739 San Diego Savage Lake Comment
  UCD61209  Ehrharta erecta John Thomas Howell 1958-5-12 33026 Alameda University of California near Center Street entrance, Berkeley. Comment
  SD112310  Eleocharis bella Darley F. Howe 1941-7-3 1126 San Diego Sweetwater Valley at Descanso Comment
  CAS-BOT-BC112990  Eleocharis macrostachya John Thomas Howell; Gordon H. True 1970-6-26 46888 Tulare Dry Lake on Cherry Hill Road, Kern Plateau 2346 Comment
  CAS-BOT-BC113214  Eleocharis parishii John Thomas Howell 1928-6-20 4055 Inyo Wet soil, Canyon near the Burro Mine, Panamint Mts. 1066 Comment
  CAS-BOT-BC113232  Eleocharis parishii John Thomas Howell 1962-9-25 38894 Kern Kern River bed 3 miles north of Kernville. 822 Comment
  CAS-BOT-BC113200  Eleocharis parishii John Thomas Howell 1965-10-13 41409 Marin John Thomas Howell Botanical Garden, Tiburon Comment
  CAS-BOT-BC112094  Eleocharis quinqueflora John Thomas Howell 1946-7-15 22389 Inyo Between Mosquito Flat and Ruby Lake, Rock Creek Lake Basin. Comment
  CAS-BOT-BC112141  Eleocharis quinqueflora John Thomas Howell 1942-8-1 17528 Tulare Sky Parlor Meadow, Chagoopa Plateau Comment
  RSA127233  Elymus X gouldii J. T. Howell 1946-6-30 22143 Marin Rodeo Lagoon Comment
  CAS-BOT-BC203838  Elymus X hansenii John Thomas Howell 1956-6-24 31619 San Francisco Summit ridge of Bayview Hills, San Francisco Comment
  CAS-BOT-BC203841  Elymus X hansenii John Thomas Howell 1955-6-13 30350 Trinity Hayfork Mt. summit on road from Douglas City to Hayfork 1097 Comment
  CAS-BOT-BC237636  Elymus X saundersii John Thomas Howell 1946-7-29 22833 Inyo Rock Creek Lake Basin. Box Lake 3200 Comment
  CAS-BOT-BC227512  Elymus elymoides John Thomas Howell 1941-8-2 16679 Madera Near Garnet Lake 2956 Comment
  CAS-BOT-BC227606  Elymus elymoides John Thomas Howell 1977-6-20 52413 Plumas On the peninsula of Lake Almanor 1371 Comment
  SD102805  Elymus elymoides var. brevifolius Darley Howe 1978-6-20 Inyo Inyo Mountains 1981 Comment
  RSA223381  Elymus glaucus J. T. Howell 1963-8-5 39957 Monterey on rocky road-cut about 5 miles east of King City on Lonoak Road. Comment
  CAS-BOT-BC203429  Elymus glaucus subsp. glaucus John Thomas Howell 1962-6-15 37488 Butte Magalia 731 Comment
  CAS-BOT-BC203753  Elymus glaucus subsp. glaucus John Thomas Howell 1958-5-22 33120 Tulare Kern River Canyon 6 miles south of Roads End P.O. 944 Comment
  CAS-BOT-BC203757  Elymus glaucus subsp. glaucus John Thomas Howell; Gordon H. True 1967-7-3 42792 Tulare West of Lamont Meadow, Kern Plateau 1706 Comment
  CAS-BOT-BC203783  Elymus glaucus subsp. glaucus John Thomas Howell 1944-8-11 20309 A Tuolumne Dog Creek, Tuolumne Meadows Comment
  CAS-BOT-BC206513  Elymus glaucus subsp. glaucus John Thomas Howell; Walter Knight; Irja Knight 1966-7-26 1586 Plumas Fern Glen - Butterfly Botanical Area and Vicinity 1097 Comment
  CAS-BOT-BC206517  Elymus glaucus subsp. glaucus John Thomas Howell; Gordon H. True; Walter Knight; Irja Knight 1967-7-10 2213 Plumas Mouth of Butterfly Creek - Butterfly Botanical Area and Vicinity 883 Comment
  CAS-BOT-BC206520  Elymus glaucus subsp. glaucus John Thomas Howell 1961-6-21 36674 Plumas Greenville - Sierra Nevada 1097 Comment
  CAS-BOT-BC206736  Elymus glaucus subsp. glaucus John Thomas Howell 1947-7-18 23427 Los Angeles Big Pines, San Gabriel Mts. 2103 Comment
  CAS-BOT-BC206786  Elymus glaucus subsp. glaucus John Thomas Howell 1943-7-26 18859 Nevada West side of Donner Pass near Norden. 2133 Comment
  UC1106108  Elymus glaucus subsp. virescens John Thomas Howell 1946-7-7 22221 Marin Mt. Tamalpais; West Peak Comment
  SDSU5365  Elymus stebbinsii D. F. Howe 1962-8-15 3470 Fresno Shaver Lake, Sierra National Forest 1676 Comment
  GH365147  Elymus trachycaulus J. T. Howell 1942-8-5 17715 Unknown Between Big Arroyo and Chagoopa Plateau Comment
  SEINET10930763  Elymus trachycaulus John Thomas Howell, Gordon H. True 1968-6-10 Howell 44549 Nevada Quincy, el. Plumas Co. 1036 Comment
  CAS-BOT-BC213513  Elymus trachycaulus subsp. trachycaulus John Thomas Howell 1969-8-25 45917 Tulare Mineral King - Sierra Nevada 2377 Comment
  CAS-BOT-BC213517  Elymus trachycaulus subsp. trachycaulus John Thomas Howell; Gordon H. True 1966-7-11 41691 Tulare Poison Meadow, Kern Plateau - Sierra Nevada 2286 Comment
  CAS-BOT-BC213520  Elymus trachycaulus subsp. trachycaulus John Thomas Howell 1942-8-5 17715 Tulare Between Big Arroyo and Chagoopa Plateau Comment
  UCD62669  Elymus trachycaulus subsp. trachycaulus John Thomas Howell 1942-7-26 17237 Tulare Mineral King. Comment
  SDSU6075  Emmenanthe penduliflora D. F. Howe 1976-6-2 4920 Ventura Potrero road 2 miles west of Reino Road, Ventura Co. 122 Comment
  SD112391  Encelia farinosa Darley F. Howe 1937-4-10 475 San Diego Borrego Valley Comment
  CAS-BOT-BC81802  Ephedra nevadensis John Thomas Howell 1962-5-21 37146 Kern Northeast of Lake Isabella 792 Comment
  NY70339  Ephedra nevadensis J. T. Howell 1958-5-28 33556 Inyo Sierra Nevada: Bishop Creek 1950.7 Comment
  RSA53905  Ephedra trifurca D. F. Howe 1949-3-19 s.n. Imperial Between Holtvill and Yuma. Comment
Read comments
Apr 12 2013
  CAS-BOT-BC81943  Ephedra viridis John Thomas Howell 1930-5-13 5028 Kern Kern Canyon, 7 miles above Kernville 844 Comment
  SDSU8810  Epilobium angustifolium subsp. circumvagum D. F. Howe 1961-8-1 3102 Humboldt 6 miles north of Trinidad on #101. Comment
  SDSU8891  Epilobium brachycarpum D. F. Howe 1963-8-6 3703 Del Norte Smith River, 18.2 miles northeast of entrance to Six Rivers National Forest on #199. 305 Comment
  CAS-BOT-BC166126  Epilobium canum John Thomas Howell 1962-7-11 38584 Kern Summit ridge, Black Mt., Greenhorn Mountains 2255 Comment
  CAS-BOT-BC166166  Epilobium canum subsp. canum John Thomas Howell 1925-11-1 1536 Contra Costa Moraga Ridge, Oakland Hills Comment
  CAS-BOT-BC166159  Epilobium canum subsp. canum John Thomas Howell 1932-10-16 10830 Alameda 6 miles from Livermore on Tesla Road Comment
  CAS-BOT-BC166556  Epilobium canum subsp. latifolium John Thomas Howell; Gordon H. True 1966-7-13 41914 Tulare Canyon of Poison Meadow Creek on Cherry Hill Road, Kern Plateau 2194 Comment
  CAS-BOT-BC166880  Epilobium canum subsp. latifolium John Thomas Howell 1940-7-28 15610 Fresno Zigzags east of Kings Canyon, Bubbs Creek Comment
  CAS-BOT-BC171931  Epilobium canum subsp. latifolium John Thomas Howell 1947-7-18 23415 Los Angeles Blue Ridge, San Gabriel Mts. 2590 Comment
  UC793593  Epilobium ciliatum subsp. ciliatum D. F. Howe 1947-8-28 29 San Bernardino S. Gorgonio Trail San Bernardino Mts. 2438 Comment
  RSA94098  Epilobium hallianum J. T. Howell 1947-6-26 23290 Sonoma Cunningham Marsh. Comment
  RSA37692  Epilobium oregonense J. T. Howell 1948-7-25 25001 Fresno Bubbs Creek Canyon in vicinity of Vidette Meadows. 2896 Comment
  RSA512825  Epilobium paniculatum J. T. Howell, Gordon H. True 1973-7-31 50028 Lassen Sierra Nevada: On road from Janesville to Thompson Peak, Diamond Range 1738 Comment
  SD130491  Epilobium paniculatum John Thomas Howell 1958-7-23 33804 Fresno Sierra Nevada, Simpson Meadow, Middle Fork of the Kings River. 1829 Comment
  CAS-BOT-BC57999  Equisetum arvense John Thomas Howell 1963-7-9 39652 El Dorado Near foot of Echo Summit grade, 1 mi. sw. of Meyers. 2011 Comment
  UC1177506  Equisetum arvense John Thomas Howell 1944-3-26 19340 Marin Inverness Comment
  SD129857  Equisetum hyemale subsp. affine Melanie Howe, David K. Faulkner 1990-6-13 93 Inyo Surprise Canyon 900 Comment
  CAS-BOT-BC57211  Equisetum hyemale subsp. affine John Thomas Howell 1931-9-26 8088 Sonoma Creek bottom at Northwood near Monte Rio on the Russian River Comment
  CAS-BOT-BC57303  Equisetum laevigatum John Thomas Howell; Gordon H. True 1973-8-1 50235 Lassen Headwaters of Baxter Creek, Canadian Zone forest, east slope of Diamond Range south of Susanville 2133 Comment
  CAS-BOT-BC57457  Equisetum laevigatum John Thomas Howell 1931-4-12 6271 Santa Barbara Ravenswood, Santa Cruz Island Comment
  CAS-BOT-BC284135  Eragrostis pectinacea var. pectinacea John Thomas Howell 1954-9-23 30109 Marin Milton H. Esberg place, Ross Comment
  CAS-BOT-BC284200  Eragrostis pectinacea var. pectinacea John Thomas Howell 1967-11-3 44046 A Tulare About 4.5 miles east-northeast of Pixley 83 Comment
  SDSU3857  Erechtites glomeratus D. F. Howe 1962-7-30 3374 Mendocino 1.8 miles north of Pt. Arena on #1. Comment
  CAS-BOT-BC168357  Eremogone congesta var. congesta John Thomas Howell 1949-7-22 25585 Tulare Rock Creek to Guyot Creek 3139 Comment
  SEINET12875573 Image available Eremogone congesta var. subcongesta John Thomas Howell, Alice Eastwood 1940-1 8110 Modoc Surprise Comment
  CAS-BOT-BC181680  Eremogone kingii var. glabrescens John Thomas Howell 1949-8-5 26046 Inyo Army Pass 3657 Comment
  CAS-BOT-BC160139  Eremothera boothii subsp. decorticans John Thomas Howell 1933-4-23 11154 San Benito 10 miles from San Benito on road to Hernandez Comment
  CAS-BOT-BC514967  Eriastrum sapphirinum subsp. dasyanthum John Thomas Howell 1928-6-10 3879 Los Angeles San Gabriel Mts: Monrovia Canyon, near Deer Park Comment
  CAS-BOT-BC286718  Ericameria bloomeri John Thomas Howell; Gordon H. True 1969-9-29 46276 Tulare Upper Dry Lake, east of north end of Long Meadow, Kern Plateau 2392 Comment
  CAS-BOT-BC286881  Ericameria ericoides John Thomas Howell 1927-9-24 3114 Orange Hills on n. side of Santa Ana Canon [Canyon] 213 Comment
  CAS-BOT-BC286923  Ericameria ericoides John Thomas Howell 1963-9-4 40336 Monterey Moss Landing Comment
  CAS-BOT-BC287470  Ericameria greenei John Thomas Howell 1960-8-19 36157 A Tehama Lassen Volcanic National Park. Brokeoff Mt 2682 Comment
  SD112586  Ericameria linearifolia Darley F. Howe 1939-4-11 776 San Diego hillside east of Banner Grade Comment
  SD81214  Ericameria nauseosa var. mohavensis Darley F. Howe 1971-10-6 Kern North of Tejon Pass. 975 Comment
  CAS-BOT-BC294137  Ericameria nauseosa var. speciosa John Thomas Howell 1943-8-5 19082 Glenn Plaskett Meadows 1828 Comment
  CAS-BOT-BC294293  Ericameria nauseosa var. speciosa John Thomas Howell 1959-9-21 34787 Plumas Rich Bar 762 Comment
  CAS-BOT-BC294297  Ericameria nauseosa var. speciosa John Thomas Howell 1959-9-25 34999 Plumas 2 miles east of Portola 1484 Comment
  CAS-BOT-BC294338  Ericameria nauseosa var. speciosa John Thomas Howell; Gordon H. True 1966-7-13 41876 Tulare Canyon of Poison Meadow Creek on Cherry Hill Road, Kern Plateau 1828 Comment
  JEPS29498  Ericameria nauseosa var. speciosa John Thomas Howell 1960-8-20 36283 Plumas near Drakesbad (Kelly Camp, near Lassen Volcanic National Park); Lassen Volcanic National Park 1615 Comment
  UCD131488  Ericameria nauseosa var. speciosa John Thomas Howell 1960-8-20 36283 Plumas Kelly Camp, near Drakesbad. 1615 Comment
  CAS-BOT-BC293021  Ericameria parryi var. nevadensis John Thomas Howell 1977-8-11 52693 Plumas North end of Frenchmans Reservoir 1706 Comment
  CAS-BOT-BC293030  Ericameria parryi var. nevadensis John Thomas Howell 1974-9-20 50903 Plumas About 2 miles from Spring Garden on road to Quincy 1158 Comment
  JEPS75242  Ericameria parryi var. nevadensis John Thomas Howell 1959-9-24 34961 Plumas near Blairsden 1341 Comment
  CAS-BOT-BC293047  Ericameria parryi var. vulcanica John Thomas Howell 1962-9-24 38862 Kern Near Tiger Flat, Greenhorn Mts. 1981 Comment
  RSA842  Ericameria pinifolia J. T. Howell 1927-10-23 770 Orange On road to Aliso Canyon Rancho Santa Ana. 152 Comment
  RSA44468  Ericameria suffruticosa J. T. Howell 1947-8-12 24037 Inyo Fourth Lake, Big Pine Lakes 3293 Comment
  JEPS75286  Ericameria teretifolia John Thomas Howell 1970-11-8 47505 Kern above Lake Isabella (on road from Weldon to Kernville) 792 Comment
  SDSU6301  Ericameria teretifolia D. F. Howe 1940-11-2 1045 Inyo Cottonwood Creek, east sie of Sierra Nevadas. Comment
  UC895582  Erigeron aliceae John Thomas Howell 14879 Siskiyou Marble Mts., Spirit Lake Marble Mts., Spirit Lake Comment
  CAS-BOT-BC294793  Erigeron breweri var. breweri John Thomas Howell 1940-8-2 15875 Tulare Slope north of Reflection Lake 3352 Comment
  CAS-BOT-BC294926  Erigeron clokeyi John Thomas Howell 1946-7-16 22437 Inyo Box Lake, Rock Creek Lake Basin 3200 Comment
  CAS-BOT-BC300369  Erigeron eatonii var. nevadincola John Thomas Howell; R. C. Barneby 1954-5-14 29547 Sierra Sierra Valley between Sierraville and Loyalton Comment
  CAS-BOT-BC308776  Erigeron foliosus var. foliosus John Thomas Howell; Gordon H. True 1969-9-30 46381 Tulare Cherry Hill Road 4 miles from Burton Camp, canyon of Poison Meadow Creek, Kern Plateau, Sierra Nevada 2194 Comment
  SD112283  Erigeron foliosus var. foliosus Darley F. Howe 1935-6-16 San Diego Japatul Comment
  CAS-BOT-BC295156  Erigeron inornatus John Thomas Howell 1960-8-20 36222 Tehama Near Lassen Volcanic National Park. Morgan 1463 Comment
  CAS-BOT-BC295261  Erigeron lonchophyllus John Thomas Howell 1946-7-17 22485 Inyo Mosquito Flat, Rock Creek Lake Basin 3139 Comment
  CAS-BOT-BC295326  Erigeron lonchophyllus John Thomas Howell; Gordon H. True 1969-9-30 46404 Tulare Pipe Spring on Cherry Hill Road, west side of Big Meadow, Kern Plateau 2407 Comment
  CAS-BOT-BC300217  Erigeron pygmaeus John Thomas Howell 1950-7-22 27220 Tulare Summit ridge, Olancha Peak 3698 Comment
  CAS-BOT-BC300220  Erigeron pygmaeus John Thomas Howell 1950-7-22 27220 Tulare Summit ridge, Olancha Peak 3698 Comment
  CAS-BOT-BC300231  Erigeron pygmaeus John Thomas Howell 1949-7-26 25803 Tulare Golden Trout Creek 2941 Comment
  SD53208  Eriodictyon californicum D. F. Howe 1962-5-19 3284 Colusa 13 miles west of Williams on # 20 213 Comment
  CAS-BOT-BC248486  Eriogonum angulosum John Thomas Howell 1930-5-8 4759 Monterey 7 miles north of San Bernardo Comment
  CAS-BOT-BC248647  Eriogonum apricum John Thomas Howell 1954-9-5 30033 Amador Ione hills 2 miles nne. of BuenaVista [Buena Vista] 91 Comment
  RSA66053  Eriogonum argillosum J. T. Howell 1933-4-23 11158 San Benito 11 miles from Hernandez on road to San Benito. Comment
  CAS-BOT-BC241600  Eriogonum baileyi var. baileyi John Thomas Howell 1969-9-15 46219 Mono Leavitt Meadow 2194 Comment
  CAS-BOT-BC248783  Eriogonum baileyi var. baileyi John Thomas Howell; Gordon H. True 1967-8-8 43608 Inyo Nine Mile [Ninemile] Canyon, Kern Plateau 1676 Comment
  CAS-BOT-BC248771  Eriogonum baileyi var. baileyi John Thomas Howell 1931-8-26 8017 Nevada Truckee Canyon, 1 mile e. of Floristan Comment
  CAS-BOT-BC248787  Eriogonum baileyi var. baileyi John Thomas Howell 1950-7-26 27375 A Inyo Olanche [Olancha] Pass to Sage Flat 2438 Comment
  CAS-BOT-BC254171  Eriogonum baileyi var. baileyi John Thomas Howell 1970-11-8 47528 Kern East end of east arm of Lake Isabella, Sierra Nevada 792 Comment
  LA206753  Eriogonum baileyi var. baileyi John Thomas Howell; 1932-8-6 507 Inyo Tom's place, near Rock Creek Holes 218 Comment
  RSA137111  Eriogonum baileyi var. baileyi J. T. Howell 1957-6-24 s.n. Kern Open desert 5 miles north of Mojave 976 Comment
  UC1042586  Eriogonum baileyi var. baileyi John Thomas Howell 1950-7-27 27406 Mono 2 1/2 mi n Bridgeport 1965 Comment
  CAS-BOT-BC244069  Eriogonum brachyanthum John Thomas Howell 1963-8-21 40237 Inyo On Whitney Portal Road, Sierra Nevada 1981 Comment
  CAS-BOT-BC241742  Eriogonum brachypodum John Thomas Howell 1928-6-20 4064 Inyo Jail Canon [Canyon] near the Burro Mine, Panamint Mts. 1066 Comment
  CAS-BOT-BC248804  Eriogonum compositum var. compositum John Thomas Howell 1943-8-6 19119 Glenn Black Butte Comment
  CAS-BOT-BC248823  Eriogonum compositum var. compositum John Thomas Howell 1945-6-20 21101 Lake Pinnacle Rock, Bartlett Mountain Comment
  CAS-BOT-BC242694  Eriogonum covilleanum John Thomas Howell 1963-8-7 40093 Monterey Mustang Grade between Mustang Summit and Priest Valley Comment
  CAS-BOT-BC256093  Eriogonum deflexum var. baratum John Thomas Howell 1962-5-21 37176 Kern Northeast of Lake Isabella, Sierra Nevada 792 Comment
  RSA137117  Eriogonum deflexum var. baratum J. T. Howell 1957-6-24 s.n. Kern 2.5 miles SSW of Red Rock Canyon. 640 Comment
  SD114072  Eriogonum elongatum var. elongatum Darley F. Howe 1945-11-22 1384 San Diego Bonita Comment
  CAS-BOT-BC253214  Eriogonum fasciculatum var. fasciculatum John Thomas Howell 1928-4-21 3751 Ventura Pt. Mugu Comment
  CAS-BOT-BC253295  Eriogonum fasciculatum var. foliolosum John Thomas Howell 1947-7-22 23471 San Bernardino Santa Ana River near South Fork, San Bernardino Mts. 1981 Comment
  RSA136749  Eriogonum fasciculatum var. foliolosum J. T. Howell 1955-7-8 30636 Monterey Canyon of Arroyo Seco River, 3.5 miles from Santa Lucia Camp on Arroyo Seco Road 732 Comment
  SD114064  Eriogonum fasciculatum var. polifolium Darley F. Howe 1951-5-24 2147 San Diego Oriflamme Canyon Comment
  CAS-BOT-BC256745  Eriogonum heermannii var. occidentale John Thomas Howell 1931-9-7 8072 San Benito San Benito Canyon, 8 miles nw. of Hernandez Comment
  CAS-BOT-BC259553  Eriogonum hirtiflorum John Thomas Howell; Gordon H. True 1966-7-11 41605 Tulare Canyon of Poison Meadow Creek on Cherry Hill Road, Kern Plateau, Sierra Nevada 1920 Comment
  CAS-BOT-BC259216  Eriogonum incanum John Thomas Howell 1941-7-24 16435 Madera Near Garnet Lake 2956 Comment
  UCD100164  Eriogonum inerme John Thomas Howell 1962-5-22 37373 Tulare 1.5 miles east of Johnsondale. 1371 Comment
  NY762748  Eriogonum inflatum J. T. Howell 1981-8-13 54567 Mono 0.7 mile south of Paradise Camp on Old Sherwin Grade Road 1463.0 Comment
  CAS-BOT-BC259141  Eriogonum latifolium John Thomas Howell 1931-6-17 6728 Del Norte 5 miles s. of Crescent City Comment
  SEINET4463948 Image available Eriogonum latifolium var. alternans J. T. Howell 1933-1 11592 Unknown Comment
  CAS-BOT-BC259311  Eriogonum lobbii John Thomas Howell 1944-8-10 20289 Mono Dana Plateau Comment
  SD22299  Eriogonum luteolum John Thomas Howell 1930-8-24 5458 Lake Dry field 2 miles west of Middtown on road to Adams Springs Comment
  CAS-BOT-BC263712  Eriogonum luteolum var. pedunculatum John Thomas Howell 1964-4-29 40670 Mariposa 4 miles from Mariposa on road to Mt. Bullion, Sierra Nevada 670 Comment
  CAS-BOT-BC263115  Eriogonum maculatum John Thomas Howell 1938-8-7 14368 Mono Sherwin Grade Comment
  SDSU6800  Eriogonum maculatum D. F. Howe 1946-6-3 1408 San Bernardino About three miles southeast of Victorville. Comment
  SD114147  Eriogonum maculatum Darley F. Howe 1960-4-27 2907 Inyo 11.5 miles east of Tecopa Comment
  CAS-BOT-BC270910  Eriogonum microthecum var. ambiguum John Thomas Howell 1947-8-16 24155 Inyo Big Pine Lakes Trail 2743 Comment
  CAS-BOT-BC268712  Eriogonum microthecum var. laxiflorum John Thomas Howell 1938-8-7 14325 Mono Crooked Creek 2057 Comment
  CAS-BOT-BC197798  Eriogonum microthecum var. microthecum John Thomas Howell 1934-6-13 12098 Modoc Patterson Mill Road, Warner Mts. 1676 Comment
  POM179710  Eriogonum nudum var. auriculatum J. T. Howell 1930-7-4 5337 Contra Costa Rocky hilltop in the north Berkeley Hills. Comment
  CAS-BOT-BC261346  Eriogonum nudum var. deductum John Thomas Howell 1950-7-21 27163 Tulare Monache Mt. 2590 Comment
  CAS-BOT-BC266091  Eriogonum nudum var. deductum John Thomas Howell 1925-7-1 1293 El Dorado Highway above Armstrong's Emerald Bay, Lake Tahoe Comment
  UC618509  Eriogonum nudum var. deductum John Thomas Howell 1938-8-8 14425 Mono Mammoth Lakes Basin Comment
  CAS-BOT-BC264856  Eriogonum nudum var. nudum John Thomas Howell; Gordon H. True 1970-7-28 47039 Tulare East side of Big Meadow on loop road south of North Manter Pass Trail, Kern Plateau, Sierra Nevada 2377 Comment
  CAS-BOT-BC269826  Eriogonum nudum var. pubiflorum John Thomas Howell 1934-7-8 12498 Lassen Spalding's, Eagle Lake Comment
  NY572532  Eriogonum nummulare J. T. Howell 1981-8-13 54579 Mono Just north of Old Sherwin Hill Summit on Old Sherwin Grade Road 1950.7 Comment
  UCD100757  Eriogonum palmerianum John Thomas Howell 1955-7-19 30806 Plumas Vinton. 1511 Comment
  CAS-BOT-BC265597  Eriogonum parishii John Thomas Howell; Gordon H. True 1967-7-5 43099 Tulare Naer road bridge on South Fork of Kern River in Kennedy Meadows, Kern Plateau, Sierra Nevada 1889 Comment
  CAS-BOT-BC265593  Eriogonum parishii John Thomas Howell; Gordon H. True 1967-7-4 43038 Tulare Fish Creek about 3.5 miles south of Troy Meadow, Kern Plateau, Sierra Nevada 2255 Comment
  RSA219  Eriogonum plumatella var. jaegeri J. T. Howell 1927-4-1 535 San Bernardino Morongo Valley 915 Comment
  CAS-BOT-BC258096  Eriogonum polypodum John Thomas Howell 1949-7-30 25905 Tulare Tunnel to Ramshaw Meadow 2712 Comment
  CAS-BOT-BC267732  Eriogonum roseum John Thomas Howell 1931-10-11 8140 Mariposa Bootjack Comment
  CAS-BOT-BC268622  Eriogonum spergulinum var. reddingianum John Thomas Howell 1955-7-7 30536 Monterey North slope of summit of Junipero Serra Peak, Santa Lucia Mts. 1767 Comment
  CAS-BOT-BC272634  Eriogonum spergulinum var. reddingianum John Thomas Howell 1941-7-31 16606 Madera Ridge nw. of San Joaquin Mt. Comment
  SDSU6765  Eriogonum spergulinum var. spergulinum D. F. Howe 1964-7-20 3846 Fresno 3.0 miles east of Huntington Lake, Sierra National Forest. 2530 Comment
  CAS-BOT-BC265204  Eriogonum umbellatum var. speciosum John Thomas Howell 1955-7-16 30665 Trinity 1.5 miles north of Douglas City 579 Comment
  RSA88594  Eriogonum ursinum J. T. Howell 1951-6-27 27630 Plumas Jamison Creek 1829 Comment
  CAS-BOT-BC264131  Eriogonum vimineum John Thomas Howell 1955-7-19 30732 Plumas Portola, west of town, Sierra Nevada 1478 Comment
  CAS-BOT-BC262428  Eriogonum viridescens John Thomas Howell 1930-5-13 4962 Kern Red Rock Canyon Comment
  RSA423137  Eriogonum viridescens J. T. Howell 1948-6-14 s.n. Kern Cedar Canyon. 457 Comment
  CAS-BOT-BC261857  Eriogonum wrightii var. subscaposum John Thomas Howell 1958-7-25 33922 Fresno Simpson Meadow, Middle Fork of the Kings River 1828 Comment
  CAS-BOT-BC261980  Eriogonum wrightii var. subscaposum John Thomas Howell; Gordon H. True 1967-9-18 43797 Tulare 4.5 miles from Lamont Meadow on road to Long Valley, Kern Plateau 1584 Comment
  CAS-BOT-BC264946  Eriogonum wrightii var. subscaposum John Thomas Howell 1963-8-20 40188 Inyo Whitney Portal, Sierra Nevada 2438 Comment
  CAS-BOT-BC265008  Eriogonum wrightii var. subscaposum John Thomas Howell 1927-11-13 3199 Los Angeles 1 1/2 miles east of Elizabeth Lake on road to Willow Springs, Liebre Mts. 914 Comment
  SD51378  Eriogonum wrightii var. subscaposum Darley F. Howe 1961-8-10 3151 El Dorado Kirkwood on Carson Pass road, #88 2347 Comment
  SDSU4079  Eriophyllum ambiguum var. ambiguum D. F. Howe 1964-5-16 3765 Kern Piute Mts. 1829 Comment
  CAS-BOT-BC304244  Eriophyllum confertiflorum John Thomas Howell 1958-5-22 33107 Tulare Kern River Canyon 6 miles S of Roads End Post Office 944 Comment
  SEINET5711482  Eriophyllum confertiflorum Melanie Howe 1988-1 14 San Diego Vacant lot next to parking lot of Broadway Animal Hospital, 380 Broadway, El Cajon.; El Cajon Comment
  UC1176923  Eriophyllum confertiflorum var. confertiflorum John Thomas Howell 1950-6-11 26628 Marin Throckmorton Ridge Mt. Tamalpais, Throckmorton Ridge Comment
  CAS-BOT-BC300937  Eriophyllum jepsonii John Thomas Howell 1937-5-20 12985 San Benito 10 miles east of Paicines Comment
  CAS-BOT-BC300968  Eriophyllum lanatum var. achilleoides John Thomas Howell 1923-11-12 244 Contra Costa Mt. Diablo Comment
  CAS-BOT-BC308138  Eriophyllum lanatum var. achilleoides John Thomas Howell 1934-7-8 12481 Lassen Spalding's, Eagle Lake Comment
  SDSU4093  Eriophyllum lanatum var. achilleoides D. F. Howe 1964-7-31 3906 Modoc Modoc National Forest 8.5 miles from entrance on road from Likely, Warner Mts. 1554 Comment
  CAS-BOT-BC301294  Eriophyllum lanatum var. arachnoideum John Thomas Howell 1930-7-27 5399 Sonoma 1 mile north of Fort Ross Comment
  SD88468  Eriophyllum lanatum var. arachnoideum Darley F. Howe 1972-6-30 Del Norte 5.5 miles south of north entrance to Six Rivers National Forest. Comment
  CAS-BOT-BC301524  Eriophyllum lanatum var. integrifolium John Thomas Howell 1958-5-25 33353 Inyo Carroll Creek 1676 Comment
  SD53407  Eriophyllum lanatum var. lanceolatum Darley F. Howe 1962-8-5 3396 Siskiyou 15.2 miles east of Happy Camp. 550 Comment
  CAS-BOT-BC301775  Eriophyllum multicaule John Thomas Howell; Gordon H. True 1969-5-13 s.n. Tulare Spanish Needle Creek road, Kern Plateau 1280 Comment
  SDSU4105  Eriophyllum multicaule D. F. Howe 1960-4-9 2839 San Luis Obispo Just east of Morro Bay. Comment
  POM203446  Eriophyllum staechadifolium J. T. Howell 1931-4-13 6324 Santa Barbara Santa Cruz Island. near west end. Comment
  SD98832  Eriophyllum staechadifolium Darley F. Howe 1977-5-19 4650 Monterey Sea Bluff near mouth of Carmel River. Comment
  RSA51279  Erodium brachycarpum J. T. Howell 1947-4-23 23075 Marin East side of Drakes Estero, Point Reyes Peninsula. Comment
  UC648303  Eryngium aristulatum var. aristulatum John Thomas Howell 1933-8-27 11619 Sonoma lands bordering San Pablo Bay s.w. Sonoma Comment
  CAS-BOT-BC218471  Eryngium spinosepalum John Thomas Howell; R. C. Barneby 1954-5-8 29203 Tulare Tule River Valley, 4.5 miles below Springville, Sierra Nevada 243 Comment
  CAS-BOT-BC40788  Erysimum capitatum John Thomas Howell 1938-5-29 13873 Madera 4.5 miles from Coarse Gold on road to O'Neal's. Comment
  CAS-BOT-BC40868  Erysimum capitatum John Thomas Howell 1933-8-18 11576 Monterey 14 miles east of Jamesburg. Santa Lucia Mountains. Comment
  CAS-BOT-BC58573  Erysimum capitatum var. capitatum John Thomas Howell 1934-6-30 12285 Modoc Duncan Horse Camp. 1355 Comment
  SD103784  Erysimum capitatum var. capitatum Darley Howe 1978-6-23 Mono Twin Lakes 2225 Comment
  SDSU2407  Erysimum capitatum var. capitatum D. F. Howe 1960-4-9 2842 San Luis Obispo Just east of Morro Bay. Comment
  CAS-BOT-BC54993  Erysimum perenne John Thomas Howell 1948-7-20 24803 Fresno Mount Gould. Fresno-Inyo County line. 3810 Comment
  CAS-BOT-BC55025  Erysimum perenne John Thomas Howell 1949-8-5 26069 Inyo Army Pass. 3657 Comment
  CAS-BOT-BC153573  Erythranthe floribunda John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-6-27 53117 Alpine Canyon of East Fork of Carson River on road to Wolf Creek Meadows 1767 Comment
  SD88375  Erythranthe guttata Darley F. Howe 1972-7-6 Siskiyou 1.3 miles south of Oregon state line on road to Happy Camp Comment
  CAS-BOT-BC153619  Erythranthe moniliformis John Thomas Howell 1976-7-16 51910 Plumas On flood plain of Spanish Creek at mouth of Wapaunsie Creek 1097 Comment
  SD128722  Erythranthe moschata Darley F. Howe 1980-7-6 Siskiyou 1.3 mile south of Oregon state line on road to Happy Camp 1645 Comment
  POM196477  Erythronium helenae J. T. Howell 1926-3-21 1715 Napa St. Helena Creek below Pattens 457 Comment
  UC1042408  Erythronium purpurascens John Thomas Howell 1951-6-28 27684 Plumas Eureka Peak 1981 Comment
  CAS-BOT-BC110554  Eschscholzia John Thomas Howell 1959-9-24 34964 Plumas Sierra Nevada. Sierra Valley near Beckwourth. 1478 Comment
  LA206219  Eschscholzia caespitosa John Thomas Howell; 1931-4-3 6127 Napa Napa Range, Pope Creek Canyon Comment
  SDSU831  Eschscholzia californica D. F. Howe 1952-6-22 2242 Monterey Santa Lucia Mtns. 457 Comment
  UC750488  Eschscholzia californica John Thomas Howell 1945-6-21 21147 Lake Sawmill Flat Bartlett Mountain 1219 Comment
  CAS-BOT-BC403111  Eschscholzia californica John Thomas Howell 1960-3-26 35209 Kern Kern Canyon 1 mile above mouth Comment
  CAS-BOT-BC418718  Eschscholzia glyptosperma John Thomas Howell 1928-4-1 3609 Inyo 4 miles s. of Bradbury Well, Black Mts. Comment
  CAS-BOT-BC310451  Eucephalus ledophyllus var. covillei John Thomas Howell 1943-8-10 19245 Glenn Black Butte Comment
  CAS-BOT-BC170785  Eucnide urens John Thomas Howell 1928-6-16 3960 Inyo Surprise Canyon, Panamint Mts. 975 Comment
  RSA608  Eucrypta chrysanthemifolia J. T. Howell 1928-6-29 1013 Los Angeles Near Seminole Hot Springs. Santa Monica Mountains 305 Comment
  SDSU6037  Eucrypta micrantha D. F Howe 1965-5-16 4041 San Bernardino 1372 Comment
  SD51415  Euphorbia fendleri Darley F. Howe 1961-6-18 3036 Inyo White Mountains, 0.7 miles from Westgard Pass on the road to Big Pine 2190 Comment
  UCD142602  Euphorbia maculata John Thomas Howell 1959-9-20 34671 Butte Eastern outskirts of Oroville. 60 Comment
  CAS-BOT-BC202472  Euphorbia ocellata John Thomas Howell 1962-5-20 37112 Kern Kernville 807 Comment
  CAS-BOT-BC207062  Euphorbia ocellata John Thomas Howell 1963-6-21 39488 Monterey Mustang Grade east of San Lorenzo Creek Comment
  CAS-BOT-BC310511  Eurybia integrifolia John Thomas Howell 1960-8-19 36130 Tehama Lassen Volcanic National Park. Brokeoff Mt. Trail 2438 Comment
  CAS-BOT-BC310553  Eurybia integrifolia John Thomas Howell 1950-7-24 27293 Tulare Monache Creek S. Fk. 2987 Comment
  CAS-BOT-BC310557  Eurybia integrifolia John Thomas Howell; Gordon H. True 1970-7-29 47077 Tulare South end of Cannell Meadow on road to Pine Flat, Kern Plateau 2316 Comment
  CAS-BOT-BC310568  Eurybia integrifolia John Thomas Howell; Gordon H. True 1966-7-11 41655 Tulare Poison Meadow, Kern Plateau 2286 Comment
  UC1177269  Eurybia radulina J. Thomas Howell 1946-9-15 23002 Marin near Potrero Meadows (Mt. Tamalpais); Mt. Tamalpais Comment
  CAS-BOT-BC310659  Euthamia occidentalis John Thomas Howell 1925-11-28 1580 Solano Green Valley near Cordelia Comment
  CAS-BOT-BC310689  Euthamia occidentalis John Thomas Howell 1962-9-25 38897 Kern Kern River bed 3 miles north of Kernville 822 Comment
  RSA942  Euthamia occidentalis J. T. Howell 1927-10-22 765 Orange Santa Ana River bottom, Rancho Santa Ana 152 Comment
  CAS-BOT-BC413899  Fallopia convolvulus John Thomas Howell 1956-7-1 31652 San Francisco Embarcadero and Vallejo St., San Francisco Comment
  SD53226  Festuca arundinacea D. F. Howe 1962-5-16 Tuolumne 10 miles west of Sonora on #108 395 Comment
  CAS-BOT-BC282506  Festuca elmeri John Thomas Howell 1947-5-4 23121 Marin San Rafael Hills Comment
  CAS-BOT-BC247717  Festuca idahoensis John Thomas Howell 1934-7-3 12376 Modoc 5 mi. S of Hackamore. Comment
  CAS-BOT-BC278430  Festuca idahoensis John Thomas Howell 1934-7-8 12496 Lassen Spalding's, Eagle Lake Comment
  CAS-BOT-BC278443  Festuca idahoensis John Thomas Howell 1941-5-25 16208 Marin Rifle Camp, Mt. Tamalpais Comment
  UCD66141  Festuca occidentalis John Thomas Howell 1958-8-2 34187 Fresno Copper Creek Canyon trail. 2286 Comment
  CAS-BOT-BC278989  Festuca rubra John Thomas Howell 1944-6-4 19561 Marin Near Mt. Vision west of Inverness Comment
  CAS-BOT-BC278523  Festuca saximontana John Thomas Howell 1958-8-14 34461 Madera Summit of ridge se. of Long Mt. 3291 Comment
  CAS-BOT-BC278588  Festuca saximontana John Thomas Howell 1940-8-8 16056 Tulare Between Reflection Lake and Harrison Pass Comment
  CAS-BOT-BC282555  Festuca viridula John Thomas Howell 1943-7-18 18547 Nevada Castle Peak Comment
  RSA1066  Forestiera pubescens J. T. Howell 1927-8-17 645 Monterey Bradley 165 Comment
  CAS-BOT-BC437064  Fragaria vesca subsp. bracteata J. T. Howell 1939-6-8 2666 Trinity South Fork Mt. Blake Lookout Road, 5.4 miles from junction Alton-Redbluff Hwy. Comment
  CAS-BOT-BC52719  Frangula californica subsp. californica John Thomas Howell 1945-6-21 21190 Lake Bartlett Mountain, Ruppert Ridge to Bartlett Flat Comment
  CAS-BOT-BC62901  Frangula californica subsp. tomentella John Thomas Howell 1959-9-20 34701 Butte Feather River Highway, 5.5 mi. below West Branch Bridge. Comment
  CAS-BOT-BC55747  Frangula rubra subsp. rubra John Thomas Howell 1925-6-17 1169 El Dorado Armstrong's, Emerald Bay, Lake Tahoe 1889 Comment
  CAS-BOT-BC55733  Frangula rubra subsp. rubra John Thomas Howell; R. C. Barneby 1954-5-11 29391 Madera Peckinpah Creek 914 Comment
  SDSU7105  Frasera albicaulis var. nitida D. F. Howe 1962-8-4 3389 Siskiyou Baldy Mountain. 1737 Comment
  CAS-BOT-BC205922  Fremontodendron californicum John Thomas Howell 1927-7-9 2699 San Bernardino Cushenberry [Cushenbury] Grade, desert side of San Bernardino Mts. 1219 Comment
  RSA1046  Fremontodendron californicum J. T. Howell 1927-7-9 322 San Bernardino Cushenberry Grade. 1220 Comment
  SD114518  Fremontodendron decumbens Darley F. Howe 1978-6-25 5061 El Dorado Pine Hill Comment
  CAS-BOT-BC504567  Fritillaria atropurpurea John Thomas Howell 1943-7-20 18601 Nevada Castle Peak Comment
  CAS-BOT-BC130307  Fritillaria brandegeei John Thomas Howell; Gordon H. True 1969-9-29 46319 Tulare True Meadow, Kern Plateau 2194 Comment
  POM203309  Galium californicum subsp. flaccidum J. T. Howell 1931-5-25 6544 Santa Barbara Mission Ridge, Santa Barbara. Comment
  SBBG29183  Galium divaricatum J. T. Howell 1943-6-19 18237 Napa hills W of Napa Valley between St Helena and Mt St John 228 Comment
  CAS-BOT-BC217571  Galium hypotrichium subsp. subalpinum John Thomas Howell 1947-8-6 23835 Inyo Above Summit Lake, Big Pine Lakes 3413 Comment
  UC710625  Galium murale John Thomas Howell 1944-4-30 19421 Alameda e Mills College; Oakland Hills, Portugese Flat 304 Comment
  SD42800  Galium parishii Darley F. Howe 1947-8-26 San Bernardino San Gorgonio Trail, among rocks Comment
  CAS-BOT-BC303499  Gamochaeta ustulata John Thomas Howell 1947-6-26 s.n. Sonoma Cunningham Marsh Comment
  CAS-BOT-BC188515  Garrya elliptica John Thomas Howell 1930-9-14 5472 Mendocino 4.5 miles n. Ft. Bragg Comment
  LA40297  Garrya elliptica John Thomas Howell; 1930-6-15 5304 Alameda Grizzly Peak, Berkeley Hills Comment
  CAS-BOT-BC169934  Garrya fremontii John Thomas Howell 1975-6-15 51081 Butte In Upper Sonoran Zone on volcanic rock, about 2 miles from Paradise on Skyway to Chico 396 Comment
  SEINET5765227  Garrya fremontii J. T. Howell 1975-6-15 51081 Butte 2 miles from Paradise on 'Skyway' to Chico. 396 Comment
  A401945  Garrya veatchii J. T. Howell 1927-6-11 2488 Unknown old road to Hesperia near Cajon Pass, Mojave Desert 1066 Comment
  SD113460  Garrya veatchii Darley F. Howe 1955-3-20 2440 San Diego East base of Mt. Woodson Comment
  POM355381  Gayophytum diffusum subsp. parviflorum D. F. Howe 1970-8-27 s.n. Mono 14.7 miles west of Sonora Junction on Sonora Pass Road 2744 Comment
  RSA39995  Gayophytum diffusum subsp. parviflorum J. T. Howell 1944-8-15 20503 Tuolumne Between Young Lake and Tuolumne Meadows 2744 Comment
  SD130492  Gayophytum diffusum subsp. parviflorum John Thomas Howell 1974-9-20 50893 Plumas 7.0 miles from Quincy on road to Blairsden. 1096 Comment
  SD56708  Geranium core-core Darley F. Howe 1963-8-1 3654 Sonoma 2.2 miles north of Jenner on #1 Comment
  CAS-BOT-BC459613  Geum macrophyllum John Thomas Howell 1943-7-17 18457 Nevada West side of Donner pass near Norden. Signal Hill 2133 Comment
  SD114206  Gilia angelensis Darley F Howe 1935-2-24 100 San Diego Otay mesa near San Ysidro. Comment
  SD43633  Gilia capitata Darley F. Howe 1948-5-23 1849 Placer American River 305 Comment
  CAS-BOT-BC225291  Gilia capitata subsp. chamissonis John Thomas Howell 1945-6-12 s.n. Marin Pt. Reyes dunes Comment
  SD64390  Gilia capitata subsp. chamissonis Darley F. Howe 1966-6-1 4249 Marin Sand hills near ocean, Pt. Reyes Peninsula Comment
  CAS-BOT-BC226208  Gilia interior John Thomas Howell 1976-5-18 51738 Kern 2.3 mi. from Alta Sierra. Along old road from Alta Sierra to Wofford Heights, Greenhorn Mountains Comment
  UC907998  Gilia latifolia John Thomas Howell 1928-3-24 3508 San Diego near Palm Wash; w Colorado Desert, near Palm Wash Comment
  SD128702  Gilia sinuata Darley F. Howe 1980-5-26 San Bernardino 1 mile north of Highway 15 on Cima Road 1220 Comment
  CAS-BOT-BC218437  Glehnia littoralis subsp. leiocarpa John Thomas Howell 1947-6-18 23279 Marin Dillon's Beach. Comment
  CDA28228  Glyceria elata J. T. Howell, G. H. True 1969-10-1 46441 Tulare Kern Plateau; Near Poison Meadow. Comment
  UCD66839  Glyceria elata John Thomas Howell 1943-7-17 18451 Nevada West side of Donner Pass near Norden. 2133 Comment
  CAS-BOT-BC282800  Glyceria leptostachya John Thomas Howell 1946-6-16 22077 Marin Olema Marshes Comment
  CAS-BOT-BC303819  Gnaphalium John Thomas Howell 1976-7-14 51819 Plumas Feather River Canyon Highway at Injun Jim Campground 609 Comment
  CAS-BOT-BC302700  Gnaphalium palustre John Thomas Howell 1936-8-25 12786 Trinity Near Trinity Center Comment
  CAS-BOT-BC307373  Gnaphalium palustre John Thomas Howell 1943-7-19 18583 Placer Summit Valley Comment
  CAS-BOT-BC307377  Gnaphalium palustre John Thomas Howell 1960-7-18 35540 Plumas Drakesbad, Lassen Volcanic National Park 1828 Comment
  CAS-BOT-BC307468  Gnaphalium palustre John Thomas Howell 1960-7-21 35836 Shasta NW of Willow Lake, Lassen Volcanic National Park 1676 Comment
  GH37684  Grindelia arenicola var. pachyphylla J. T. Howell 1931-9-27 8106 Unknown Open coastal plain 6 miles south of Point Arena Comment
  GH417567  Grindelia camporum J. T. Howell 1930-6-29 5329 Unknown Merced Comment
  SDSU2707  Grindelia camporum D. F. Howe 1963-6-30 3646 Santa Barbara Above Jalama State Park. Comment
  GH37685  Grindelia camporum f. foliacea J. T. Howell 1930-5-30 5201 Unknown 1 mile from Vacaville on road to Elmira Comment
  CAS-BOT-BC304475  Grindelia hirsutula John Thomas Howell 1925-4-5 896 Marin Pipeline Trail Comment
  CAS-BOT-BC304852  Grindelia hirsutula J. T. Howell 1925-11-26 1563 Solano Between Benecia and Cordelia Comment
  CAS-BOT-BC304903  Grindelia hirsutula John Thomas Howell 1929-8-4 4361 A Napa Flood bed of Pope Creek, one mile below Samuels Springs, Napa Range Comment
  CAS-BOT-BC304907  Grindelia hirsutula John Thomas Howell 1933-8-27 11645 Napa East of Chiles Valley on road to Winters, Napa Range Comment
  UC1176886  Grindelia hirsutula John Thomas Howell 1945-7-29 21362 Marin ocean bluff at mouth Rio Honda (n of Bolinas) Comment
  CAS-BOT-BC304964  Grindelia hirsutula John Thomas Howell 1931-5-29 6573 Ventura Conejo Valley Comment
  GH417717  Grindelia stricta var. angustifolia J. T. Howell 1933-7-30 11472 Unknown Head of Tomales Bay Comment
  SEINET196485  Grindelia stricta var. angustifolia J. T. Howell 1949-10-9 26300 Marin Salt marsh bordering San Francisco Bay at N end of Tiburon Pensinula Comment
  UC1177250  Guillenia lasiophylla John Thomas Howell 1940-5-12 15429 Marin between Little Carson and Carson Ridge Comment
  CAS-BOT-BC304585  Gutierrezia californica John Thomas Howell 1967-9-30 44017 Marin West side of Angel Island Comment
  CAS-BOT-BC231144  Hackelia amethystina John Thomas Howell 1944-7-13 19736 Glenn Plaskett Meadows Comment
  CAS-BOT-BC306273  Hedypnois cretica John Thomas Howell 1942-5-3 16955 Marin South side of Mt. Tamalpais above Summit Ave. ridge Comment
  CAS-BOT-BC306277  Hedypnois cretica John Thomas Howell 1925-5-9 1023 Merced 3 miles sw. of Merced Comment
  CAS-BOT-BC306760  Helenium bigelovii John Thomas Howell 1938-7-17 13984 Solano Suisun Marshes at Suisun Comment
  SD37202  Helenium bigelovii Darley F. Howe 1941-8-8 1283 Inyo Lone Pine Creek Comment
  UC897333  Helenium bigelovii J. T. Howell 1938-7-17 13984 Solano Suisun Marshes Suisun, Suisun Marshes Comment
  CAS-BOT-BC306830  Helenium bigelovii John Thomas Howell 1950-7-24 27329 Tulare East of Hessian Meadows 2895 Comment
  RSA872  Helenium puberulum J. T. Howell 1927-7-15 402 Orange Santa Ana River, Rancho Santa Ana [Botanic Garden] 152 Comment
  CAS-BOT-BC314715  Helianthella californica var. californica John Thomas Howell 1931-6-15 6704 Mendocino Carl Purdy's place near Ukiah, Mayacama Mts. Comment
  RSA215917  Helianthus annuus subsp. lenticularis J. T. Howell 1957-9-22 32969 San Francisco In waste ground, north base of Telegraph Hill, San Francscio. Comment
  CAS-BOT-BC305542  Helianthus bolanderi John Thomas Howell 1951-8-20 28225 Plumas Indian Valley 1097 Comment
  POM180773  Helianthus bolanderi J. T. Howell 1930-10-19 5616 Napa Dry slope, 3 miles from Aetna Springs on Butte Valley road to Middletown Comment
  RSA0012964  Helianthus californicus J. T. Howell 1933-8-27 11624 Napa Sage Canyon, Napa Range. Comment
  SD60974  Helianthus niveus subsp. tephrodes Darley F. Howe 1964-4-11 3758 Imperial 22.3 miles east of Brawley on road to Glamis. 120 Comment
  CAS-BOT-BC312142  Hemizonella minima John Thomas Howell 1962-5-22 37353 Tulare Johnsondale, Sierra Nevada 1423 Comment
  JEPS29570  Hemizonella minima John Thomas Howell 1961-6-20 36543 Shasta Lassen Hwy 1 mi nw Lost Creek Bridge; Lassen Volcanic National Park 1798 Comment
  SDSU4585  Hemizonia congesta subsp. clevelandii D. F. Howe 1977-7-2 4984 Siskiyou 7 miles west of Fort Jones on Scott River road. 671 Comment
  UC1177316  Hemizonia congesta subsp. congesta John Thomas Howell 1946-6-13 22046 Marin e Aurora School (at the Sonoma Co. line) Comment
  CAS-BOT-BC309714  Hemizonia congesta subsp. lutescens John Thomas Howell 1930-7-27 5409 Sonoma 8 miles south of Ft. Ross Comment
  UCR47732  Hemizonia minthornii J. T. Howell 1977-3-7 s.n. Los Angeles Santa Susana Mtns., Summit of Santa Susana Pass 488 Comment
  GH414548  Hemizonia pungens J. T. Howell 1962-5-23 37389 Unknown Isabella 762 Comment
  RSA22001  Herniaria hirsuta subsp. cinerea J. T. Howell 1938-4-3 13727 Alameda 5 miles E of Livermore. Comment
  CAS-BOT-BC388491  Herniaria hirsuta var. cinerea John Thomas Howell; Gordon H. True; Barbara T. Menzies; Roberta Shockey 1978-4-5 52810 Calaveras Camp Nine Road northeast of Vallecito 609 Comment
  CAS-BOT-BC310138  Hesperevax acaulis John Thomas Howell 1930-5-15 5159 Kern Hills near Glenville, Greenhorn Range 975 Comment
  SD61063  Hesperevax acaulis var. ambusticola Darley F. Howe 1964-5-21 3796 Fresno 2.4 miles from entrance to Sierra National Forest. 1064 Comment
  UCD114967  Hesperis matronalis John Thomas Howell; Gordon H. True 1967-6-11 42568 A Plumas Meadow at Quincy. 1036 Comment
  CAS-BOT-BC403793  Hesperocnide tenella John Thomas Howell 1965-4-26 41178 Madera 3 miles south of Oakhurst 914 Comment
  RSA54067  Hesperocnide tenella J. T. Howell 1949-7-4 25355 Santa Cruz Near Felton. Comment
  RSA91376  Hesperolinon adenophyllum J. T. Howell 1937-7-19 s.n. Lake Elk Mountain Comment
  CAS-BOT-BC167411  Hesperolinon bicarpellatum John Thomas Howell 1945-6-22 21229 Lake 3.8 miles north of Middletown Comment
  CAS-BOT-BC167433  Hesperolinon breweri John Thomas Howell 1942-7-19 17047 Contra Costa Serpentine ne. of Deer Flat, Mt. Diablo Comment
  CAS-BOT-BC176069  Hesperolinon congestum John Thomas Howell 1943-5-15 18094 Marin Tiburon Peninsula Comment
  SEINET10460708  Heterocodon rariflorum Howell 1951-6-28 Howell 27675 Plumas JAMISON CREEK 5200 Comment
  CAS-BOT-BC308929  Heterotheca John Thomas Howell 1958-5-21 33041 Kern 2 miles southwest of Miracle Hot Springs 731 Comment
  UCR88744  Heterotheca oregona J. T. Howell 1959-9-20 34620 Butte eastern outskirts of Oroville on level of Feather River 61 Comment
  CAS-BOT-BC311017  Heterotheca oregona John Thomas Howell 1959-9-26 35077 A Plumas Feather River Canyon (north fork) 1 mile above 2000 ft. marker Comment
  CAS-BOT-BC311031  Heterotheca oregona var. compacta John Thomas Howell 1930-10-19 5600 Napa Bed of Conn Creek near entrance of Sage Canyon, Napa Valley Comment
  CAS-BOT-BC310819  Heterotheca sessiliflora subsp. echioides John Thomas Howell 1933-8-19 11614 Santa Cruz Mt. Hermon, Santa Cruz Mts. Comment
  CAS-BOT-BC318953  Heterotheca sessiliflora var. echioides John Thomas Howell 1933-8-18 11559 Monterey 2 miles west of Greenfield, Santa Lucia Mts. Comment
  CAS-BOT-BC424451  Heuchera rubescens John Thomas Howell 1947-8-8 23908 Inyo Second to Third Lake, Big Pine Lakes 3048 Comment
  CAS-BOT-BC312312  Hieracium John Thomas Howell 1958-7-30 34131 Fresno Simpson Meadow, Middle Fork of the Kings River, Sierra Nevada 1828 Comment
  SD26307  Hieracium albiflorum Darley F. Howe 1939-7-24 964 Mariposa Yosemite National Park; Oak Flat Road. Comment
  SD61018  Hieracium cynoglossoides Darley F. Howe 1964-7-31 Modoc 8.5 miles from entrance to Modoc National Forest on road from Likely. 1555 Comment
  CAS-BOT-BC318641  Hieracium horridum John Thomas Howell 1962-7-11 38582 Kern Summit ridge, Black Mountain, Greenhorn Mountains, Sierra Nevada 2255 Comment
  CAS-BOT-BC318670  Hieracium horridum John Thomas Howell 1948-7-22 24894 Fresno Bubbs Creek Canyon in vicinity of Vidette Meadows 3048 Comment
  CAS-BOT-BC318821  Hieracium horridum John Thomas Howell 1944-8-16 20610 Tuolumne Mono Pass Trail Comment
  SD53140  Hieracium horridum Darley F. Howe 1962-8-17 3450 Fresno Tamarack Creek, 13 miles east of shaver Lake on highway 168. 2165 Comment
  CAS-BOT-BC55351  Hirschfeldia incana John Thomas Howell 1970-11-8 47516 Kern Sierra Nevada. Lake Isabella, 6 miles from South Fork Kern River bridge on road from Weldon to Kernville. 792 Comment
  CAS-BOT-BC55405  Hirschfeldia incana John Thomas Howell; Gordon H. True 1968-6-10 44541 Plumas Sierra Nevada. Quincy. 1036 Comment
  CAS-BOT-BC207569  Hoffmannseggia microphylla John Thomas Howell 1928-3-25 3543 Riverside Painted Canyon [Canon] Comment
  CAS-BOT-BC280778  Holcus lanatus John Thomas Howell 1960-8-23 36428 Shasta Lassen Volcanic National Park. Reflection Lake 1792 Comment
  CAS-BOT-BC320142  Holocarpha heermannii John Thomas Howell 1962-7-12 38652 Kern 3 mi. north of Kernville 822 Comment
  CAS-BOT-BC325831  Holocarpha heermannii John Thomas Howell 1930-9-28 5499 Contra Costa 6.3 miles from Byron on teh Marsh Creek Road Comment
  CAS-BOT-BC320312  Holocarpha virgata John Thomas Howell 1932-10-16 10832 Alameda 8 miles from Livermore on Tesla Road Comment
  SD112645  Holocarpha virgata subsp. elongata Darley F. Howe 1938-8-7 710 San Diego Highway near Poway Comment
  CAS-BOT-BC459651  Holodiscus John Thomas Howell 1962-9-24 38849 Kern Summit of ridge of Sunday Peak, Greenhorn Mountains 2529 Comment
  SD51343  Holodiscus discolor Darley Howe 1961-7-24 Santa Cruz 2 miles north of Skyline on #9 609 Comment
  CAS-BOT-BC149933  Holodiscus discolor var. discolor John Thomas Howell; Gordon H. True 1966-7-12 41816 Kern Just east of Fay Creek Canyon, Kern Plateau 2194 Comment
  CAS-BOT-BC149971  Holodiscus discolor var. discolor John Thomas Howell 1938-5-22 13797 Marin San Anselmo Canyon Comment
  CAS-BOT-BC152409  Holodiscus discolor var. discolor John Thomas Howell 1945-9-26 21508 Tuolumne Lembert Dome, Tuolumne Meadows Comment
  SD114325  Holodiscus discolor var. microphyllus Darley F. Howe 1941-8-5 1147 Inyo Lone Pine Creek, Sierra Nevadas Comment
  CAS-BOT-BC152754  Holodiscus microphyllus var. microphyllus John Thomas Howell 1950-7-17 26991 Tulare Bakeoven Meadows, South Fork of Kern River - Sierra Nevada 2468 Comment
  CAS-BOT-BC284642  Hordeum brachyantherum subsp. brachyantherum John Thomas Howell 1943-7-18 18510 Nevada Willow Valley just west of Castle Peak Comment
  CAS-BOT-BC289506  Hordeum brachyantherum subsp. californicum John Thomas Howell 1963-6-22 39515 Monterey Near summit of Mustang Grade east of San Lorenzo Creek Comment
  RSA121024  Hordeum brachyantherum subsp. californicum J. T. Howell 1957-5-19 32365 Stanislaus Del Puerto Canyon Comment
  CAS-BOT-BC284714  Hordeum jubatum John Thomas Howell; Gordon H. True 1973-8-1 50198 Lassen Ca. 3 miles se. of Diamond Mt., summit of Diamond Range south of Susanville 2194 Comment
  CAS-BOT-BC285107  Hordeum marinum subsp. gussoneanum John Thomas Howell 1967-6-23 42691 Plumas Butterfly Valley 1066 Comment
  CAS-BOT-BC285124  Hordeum marinum subsp. gussoneanum John Thomas Howell 1956-5-19 31401 San Francisco Near Third & Army streets, San Francisco Comment
  GH365226  Hordeum marinum subsp. gussoneanum J. T. Howell 1944-5-28 Unknown Almonte Comment
  CAS-BOT-BC285079  Hordeum marinum subsp. gussoneanum John Thomas Howell 1957-5-19 32350 Stanislaus Del Puerto Canyon Comment
  CAS-BOT-BC289585  Hordeum marinum subsp. gussoneanum John Thomas Howell 1955-5-20 30222 Monterey 1 1/2 miles east of summit of Jamesburg Road, Santa Lucia Mts. Comment
  RSA118034  Hordeum marinum subsp. gussoneanum J. T. Howell 1955-5-20 30222 Monterey 1.5 miles east of summit of Jamesburg road, Santa Lucia Mts. Comment
  CAS-BOT-BC284774  Hordeum murinum subsp. glaucum John Thomas Howell 1954-5-15 s.n. Yolo Woodland Comment
  CAS-BOT-BC284862  Hordeum murinum subsp. glaucum John Thomas Howell 1958-5-22 33124 Tulare Kern River Canyon 6 miles south of Roads End P.O. 944 Comment
  CAS-BOT-BC289385  Hordeum murinum subsp. glaucum John Thomas Howell 1956-5-19 21416 A San Francisco Third and Army Streets, San Francisco Comment
  RSA223637  Hordeum murinum subsp. glaucum J. T. Howell 1956-7-1 31664 San Francisco Hunters Point Comment
  UCD86235  Hordeum murinum subsp. glaucum John Thomas Howell; Gordon H. True 1967-7-4 43002 Tulare Kern Plateau. 3.4 miles S of Troy Meadow. 2286 Comment
  CAS-BOT-BC282031  Hordeum murinum subsp. leporinum John Thomas Howell 1932-3-13 8218 Ventura San Nicolas Island Comment
  CAS-BOT-BC273527  Hordeum vulgare John Thomas Howell 1963-5-7 39201 Monterey On San Lorenzo Creek, 6 miles northeast of King City 182 Comment
  CAS-BOT-BC273523  Hordeum vulgare John Thomas Howell 1949-6-7 25342 Marin Aurora School, nw. Marin Co. Comment
  UC473469  Horkelia californica John Thomas Howell 1930-6-8 5279 Sonoma 8 mi n Bodega Bay Comment
  CAS-BOT-BC536125  Horkelia californica John Thomas Howell 1956-6-17 31565 San Francisco Summit ridge of Bayview Hills, San Francisco Comment
  SD64314  Horkelia cuneata var. cuneata Darley F. Howe 1966-5-27 Santa Cruz Mt. Herman 152 Comment
  CAS-BOT-BC143432  Horkelia fusca var. parviflora John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-23 54170 Plumas Long Valley at road to Maxwell Mine 1633 Comment
  CAS-BOT-BC146325  Horkelia tularensis John Thomas Howell; T. C. Fuller; G. D. Barbe 1980-7-16 53871 Tulare Bald Mountain, Kern Plateau 2834 Comment
  CAS-BOT-BC88562  Hornungia procumbens John Thomas Howell 1962-7-12 38642 Kern Sierra Nevada. Kernville. 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-BC312554  Hulsea heterochroma John Thomas Howell; Gordon H. True 1967-9-18 43810 Tulare About 6 miles from Chimney Meadow on road to Long Valley, Kern Plateau 2346 Comment
  CAS-BOT-BC315942  Hulsea vestita subsp. vestita John Thomas Howell; Gordon H. True 1970-6-23 46666 Mono Northeast end of Big Meadow, Kern Plateau, Sierra Nevada 2377 Comment
  SDSU1696  Hulsea vestita var. pygmaea D. F. Howe 1961-4-26 3048 Inyo North of Westgard Pass, White Mts. 2347 Comment
  SD70025  Hydrophyllum canadense Darley Howe 1968-5-28 4536 Mendocino Divide 1768 Comment
  SD147550  Hydrophyllum occidentale John Thomas Howell 1962-7-10 38942 Kern Greenhorn Mts. Shirley Meadows 2012 Comment
  RSA888  Hymenopappus filifolius var. lugens J. T. Howell 1927-7-10 362 San Bernardino Big Bear, San Bernardino Mountains. 1828 Comment
  CAS-BOT-BC400860  Hypericum anagalloides John Thomas Howell 1950-7-15 26904 Tulare Bakeoven Meadows, South Fork of Kern River 2468 Comment
  CAS-BOT-BC400958  Hypericum anagalloides John Thomas Howell 1946-8-17 22876 Sonoma Cunningham Marsh Comment
  CAS-BOT-BC400988  Hypericum anagalloides John Thomas Howell 1939-8-5 15083 Siskiyou Spirit Lake, Marble Mts. 1828 Comment
  JEPS63220  Hyptis emoryi John Thomas Howell 1928-1-29 3295 Riverside Painted Canyon; Colorado Desert, Painted Canyon Comment
  SD81274  Iris innominata Darley F. Howe 1969-5-31 Del Norte Rowdy Creek Road. 609 Comment
  SD112455  Iris purdyi darley F. Howe 1972-5-6 4832 Humboldt 1.5 miles north of Phillipsville. Comment
  SD112606  Isocoma menziesii var. menziesii Darley F. Howe 1959-10-4 2818 San Diego 1 mile northeast of Highway 101 in San Ysidro, on Otay Mesa. Comment
  CAS-BOT-BC69876  Isoetes nuttallii John Thomas Howell 1940-3-17 15390 Marin Lagunitas Meadows. Comment
  CAS-BOT-BC112528  Isolepis cernua John Thomas Howell 1956-6-5 31486 San Francisco North slope of Bayview Hills, San Francisco Comment
  SD112247 Image available Isolepis cernua Darley F. Howe 1941-9-21 1322 San Diego Stream bed west of Campo. Comment
  CAS-BOT-BC137435  Ivesia baileyi var. baileyi John Thomas Howell 1977-8-11 52685 Plumas Canyon of Little Last Chance Creek between Chilcoot and Frenchmans Reservoir 1676 Comment
  UC618529  Ivesia kingii var. kingii John Thomas Howell 1938-8-8 14380 Mono Long Valley Comment
  CAS-BOT-BC142781  Ivesia lycopodioides subsp. lycopodioides John Thomas Howell 1944-8-15 20550 Tuolumne Mt. Conness 3505 Comment
  CAS-BOT-BC142802  Ivesia lycopodioides subsp. megalopetala John Thomas Howell 1946-7-14 22238 Inyo Mosquito Flat, Rock Creek Lake Basin 3139 Comment
  CAS-BOT-BC142818  Ivesia muirii John Thomas Howell 1946-7-20 22575 Fresno Unlaciated ridge sout of Mono Rock 3596 Comment
  UC710585  Ivesia muirii John Thomas Howell 1944-8-15 20523 Tuolumne Mt. Conness 3352 Comment
  UC574877  Ivesia pickeringii John Thomas Howell 1936-8-26 12797 Trinity 8 mi n Carrville Comment
  CAS-BOT-BC47025  Jamesia americana var. rosea John Thomas Howell 1946-7-26 22775 Fresno Mono Mesa above Gold Lake. Comment
  CAS-BOT-BC340166  Jaumea carnosa John Thomas Howell 1927-6-30 2626 Los Angeles 1 mile east of Long Beach 15 Comment
  CAS-BOT-BC340251  Jensia rammii John Thomas Howell; R. C. Barneby 1954-5-13 29518 Calaveras 3 miles northeast of Mountain Ranch 762 Comment
  POM304503  Juncus bryoides J. T. Howell 1941-8-8 16836 Madera Garnet Creek to San Joaquin Mountain. Comment
  CAS-BOT-BC123260  Juncus howellii John Thomas Howell 1936-8-24 12750 Trinity Summit of Scott Mts., N of Carrville Comment
  UCD141561  Juncus kelloggii John Thomas Howell 1967-6-8 42549 Marin northern National Seashore beach area, Point Reyes Peninsula. Comment
  RSA44161  Juncus mexicanus J. T. Howell 1947-8-5 23806 Inyo Fifth Lake, Big Pine Lakes. 3354 Comment
  UC793648  Juncus mexicanus D. F. Howe 1947-6-2 16 San Bernardino s of Big Bear Lake 2225 Comment
  POM261499  Juncus oxymeris J. T. Howell 1940-6-30 15594 Lake Soda Bay. Comment
  UCD142363  Juncus tenuis John Thomas Howell 1960-8-20 36224 Tehama Morgan, Lassen Volcanic National Park. 1463 Comment
  UC1543890  Juncus tiehmii John Thomas Howell and Gordon H. True 1967-7-5 43131 Tulare 6 mi n South Fork Kern River (bridge on road to Troy Meadows); Sierra Nevada, Kern Plateau 2286 Comment
  CAS-BOT-BC81257  Juniperus occidentalis John Thomas Howell 1950-7-26 27340 Tulare Between Monache and Summit Meadows 2590 Comment
  CAS-BOT-BC243678  Justicia californica John Thomas Howell 1927-11-25 3220 San Diego N. Borrego Valley W. Colorado Desert 243 Comment
  CAS-BOT-BC235595  Keckiella breviflora John Thomas Howell; Gordon H. True 1967-7-3 42781 Tulare Near north end of Lamont Meadow on road to Chimney Meadow, Kern Plateau 1859 Comment
  CAS-BOT-BC236767  Keckiella breviflora John Thomas Howell 1945-6-21 21173 Lake Sawmill Flat to Ruppert Ridge, Bartlett Mountain Comment
  SD113660  Keckiella cordifolia Darley F. Howe 1979-6-18 5095 Ventura Canyon 15.7 miles south of Santa Barbara Comment
  CAS-BOT-BC237849  Keckiella lemmonii John Thomas Howell 1929-8-4 4356 Napa One mile below Samuels Springs, Pope Creek Canon [Canyon], Napa Range Comment
  CAS-BOT-BC246118  Keckiella ternata var. ternata John Thomas Howell 1947-7-18 23378 Los Angeles Tujunga Canyon, San Gabriel Mountains 914 Comment
  CAS-BOT-BC180809  Kochia scoparia John Thomas Howell 1956-8-19 31774 San Francisco Waterfront St. near Mission Rock Terminal, San Francisco Comment
  CAS-BOT-BC273797  Koeleria pyramidata John Thomas Howell; Gordon H. True 1970-7-28 46956 Tulare West side of Big Meadow just south of Pipe Spring. Kern Plateau 2377 Comment
  SBBG92287  Krameria erecta D. F. Howe 1980-5-28 Inyo 5 mi W of California/Nevada state line on Hwy 178 835 Comment
  CAS-BOT-BC340670  Lactuca serriola John Thomas Howell 1967-11-3 44044 Tulare About 4.5 miles east-northeast of Pixley 83 Comment
  CAS-BOT-BC340623  Lactuca serriola John Thomas Howell 1957-6-17 32673 San Francisco San Francisco. Lone Mt. Comment
  CAS-BOT-BC341324  Lagophylla glandulosa John Thomas Howell 1938-5-29 13860 Madera Raymond Comment
  CAS-BOT-BC341444  Lagophylla ramosissima John Thomas Howell; R. C. Barneby 1954-5-11 29440 Mariposa 6 miles northwest of Raymond Comment
  CAS-BOT-BC341542  Lagophylla ramosissima John Thomas Howell 1963-5-5 39034 Monterey Mustang Grade, west of Priest Valley 670 Comment
  CAS-BOT-BC49451  Lagophylla ramosissima subsp. ramosissima John Thomas Howell 1934-6-11 11939 Modoc Parker Creek, Warner Mountains 1584 Comment
  SD50971  Langloisia setosissima subsp. punctata Darley F. Howe 1958-4-12 2605 San Bernardino East base of Bristol Mountains; San Bernardino Mts. Comment
  SDSU3124  Langloisia setosissima subsp. punctata D. F. Howe 1978-6-20 5033 Inyo Inyo Mtns. 1981 Comment
  CAS-BOT-BC337871  Lapsana communis John Thomas Howell 1941-6-29 16325 Marin Mill Valley Comment
  CAS-BOT-BC338941  Lasthenia californica John Thomas Howell 1958-4-27 33018 San Benito 5 miles n. of Pinnacles Comment
  CAS-BOT-BC334572  Lasthenia californica John Thomas Howell 1937-5-23 13004 San Francisco Presidio, San Fransicso Comment
  CAS-BOT-BC337947  Lasthenia californica John Thomas Howell 1931-4-4 6182 Solano Blue Rock Springs near Vallejo Comment
  RSA93011  Lasthenia californica J. T. Howell 1933-5-24 11340 San Francisco Point Lobos, San Francisco. Comment
  CAS-BOT-BC324402  Lasthenia californica subsp. macrantha John Thomas Howell 1930-4-20 4739 Marin Pt. Reyes Comment
  CAS-BOT-BC352913  Lasthenia coronaria John Thomas Howell 1930-5-10 4800 Riverside Top of St. John's Grade Comment
  UC1106186  Lasthenia glaberrima John Thomas Howell 1945-5-9 20827 Marin between Hamilton Field and Ignacio Comment
  RSA1440  Lasthenia gracilis J. T. Howell 1929-2-14 1229 Riverside 3 miles S of Glen Ivy. Comment
  UC421687  Lasthenia gracilis John Thomas Howell 1929-4-11 4140 Merced on Los Banos Road 7 1/2 mi sw, on elevated hog wallows Merced; San Joaquin Valley 45 Comment
  SD81265  Lasthenia macrantha Darley F. Howe 1969-5-27 Marin Bluff above Drake's Bay. Comment
  CAS-BOT-BC367532  Lasthenia microglossa John Thomas Howell 1930-5-15 5136 Kern Hills near Glenville, Greenhorn Range 975 Comment
  CAS-BOT-BC370869  Lasthenia minor John Thomas Howell 1935-3-25 2034 San Luis Obispo West side of Cottonwood Pass Comment
  RSA44356  Lathyrus torreyi J. T. Howell 1940-5-12 15424 Marin Between Little Carson and Carson Ridge. Comment
  CDA4999  Lavatera cretica J. T. Howell 1976-6-2 51805 Marin Corte Madera. 0 Comment
  CAS-BOT-BC323252  Layia chrysanthemoides John Thomas Howell 1931-4-2 6048 Sonoma Boyes Springs Comment
  POM361710  Layia platyglossa subsp. campestris J. T. Howell 1931-3-29 6009 San Benito 4 miles from San Benito on road to the Pinnacles Comment
  CAS-BOT-BC537132  Lemna minor John Thomas Howell 1956-12-3 31973 Mariposa 5.5 miles from Cathay on road to Planada, Sierra Nevada Comment
  CAS-BOT-BC534658  Lemna minuta John Thomas Howell 1956-9-2 31828 San Francisco East end of Lake Merced, San Francisco Comment
  CAS-BOT-BC534878  Lemna valdiviana John Thomas Howell 1939-7-16 s.n. Marin Azalea Flat, Matt Davis Trail, Mt. Tamalpais Comment
  CAS-BOT-BC221547  Lepechinia calycina John Thomas Howell 1931-4-15 6404 Santa Barbara Pelican Bay, Santa Cruz Island Comment
  RSA1076  Lepechinia cardiophylla J. T. Howell 1927-6-26 225 Orange Claymine Canyon, near Sierra Peak 610 Comment
  CAS-BOT-BC88703  Lepidium acutidens John Thomas Howell 1933-3-29 10894 Contra Costa Nortonville. Comment
  CAS-BOT-BC88890  Lepidium chalepense John Thomas Howell; Gordon H. True 1968-5-12 44216 Tulare Sierra Nevada. Kern Plateau. Brush Creek Canyon. 1402 Comment
  SBBG92200  Lepidium fremontii D. F. Howe 1980-5-25 San Bernardino 1 mi N of Interstate 15 on Cima Rd 1220 Comment
  CAS-BOT-BC89530  Lepidium lasiocarpum John Thomas Howell 1947-6-18 23277 Marin Dillons Beach. Comment
  SD113487  Lepidium lasiocarpum Darley F. Howe 1941-6-15 1108 San Diego Tijuana Valley, 2 miles from ocean Comment
  RSA54058  Lepidium latifolium J. T. Howell 1948-8-10 25285 A Santa Clara 4 miles N of Madrone. Comment
  RSA217989  Lepidium latipes J. T. Howell 1963-5-6 39135 Monterey 3 miles N of Jolon. 335 Comment
  CAS-BOT-BC12743  Lepidium oxycarpum John Thomas Howell 1933-4-1 10919 Marin 4.5 miles north of San Rafael. Comment
  CAS-BOT-BC60050  Lepidium virginicum var. menziesii John Thomas Howell 1923-6-7 31 Mariposa Wawona. 1219 Comment
  CAS-BOT-BC329357  Lepidospartum squamatum John Thomas Howell 1927-7-28 2864 Orange North side of Santa Ana Canon 152 Comment
  SD112499  Lepidospartum squamatum Darley F. Howe 1938-9-26 747 Los Angeles Near Claremont. Comment
  CAS-BOT-BC273966  Leptochloa fusca subsp. fascicularis John Thomas Howell 1962-9-25 38893 Kern Kern River bed 3 miles north of Kernville 822 Comment
  SEINET10588911  Leptochloa fusca subsp. fascicularis John Thomas Howell 1963-8-20 Howell 40133 Kern South Fork Valley about 2 miles northeast of Weldon, el. 808 Comment
  SEINET10861678  Leptochloa fusca subsp. fascicularis John Thomas Howell 1962-9-21 Howell 38673 Kern Kern River Canyon, el. ca. 305 Comment
  CAS-BOT-BC272392  Leptochloa fusca subsp. uninervia John Thomas Howell; R. C. Barneby 1954-5-9 29233 Tulare Plains 1 mile west of Woodlake 134 Comment
  SD70024  Leptosiphon bolanderi Darley Howe 1968-5-28 4539 Tehama 1.3 miles north of Log Springs Guard Station. 1372 Comment
  CAS-BOT-BC225616  Leptosiphon oblanceolatus John Thomas Howell 1946-7-22 22664 Fresno Pioneer Basin 3291 Comment
  JEPS20591  Lessingia arachnoidea John Thomas Howell 1926-10-9 2220 A San Mateo near Crystal Springs Lake 91 Comment
  JEPS20555  Lessingia germanorum John Thomas Howell 1926-11-7 2233 San Francisco near Lake Merced Comment
  CAS-BOT-BC339364  Lessingia glandulifera var. glandulifera John Thomas Howell 1927-8-2 2929 Riverside Top of control on road to Hemet, Mt. San Jacinto Comment
  CAS-BOT-BC339303  Lessingia glandulifera var. glandulifera John Thomas Howell 1927-9-10 2270 Merced Hopeton Bridge 213 Comment
  UC1177361  Lessingia glandulifera var. peirsonii John Thomas Howell 1957-6-24 32748 Kern 5 mi s Freeman Junction 853 Comment
  SBBG28037  Lessingia hololeuca J. T. Howell 1945-9-2 Marin San Rafael Hills Comment
  CAS-BOT-BC339665  Lessingia leptoclada John Thomas Howell 1923-8-2 221 Mariposa Flats of Wawona Meadow, Wawona 1219 Comment
  POM197773  Lessingia leptoclada John T. Howell 1927-8-28 3069 Tulare 5 miles below Three Rivers. Comment
  JEPS59022  Lessingia nemaclada John Thomas Howell 1960-7-24 35997 Tehama 8 mi w Mineral 1219 Comment
  CAS-BOT-BC330367  Lessingia tenuis John Thomas Howell 1960-4-23 35213 Stanislaus Arroyo del Puerto 518 Comment
  CAS-BOT-BC444509  Lewisia triphylla John Thomas Howell 1925-6-28 1229 El Dorado Trail between Eagle Lake and the Velma Lakes, Lake Tahoe region. Comment
  CAS-BOT-BC283523  Leymus X vancouverensis John Thomas Howell 1945-6-30 21251 Marin Stinson Beach Comment
  CAS-BOT-BC283527  Leymus X vancouverensis John Thomas Howell 1945-6-3 20926 Marin Shell Beach Comment
  CAS-BOT-BC247638  Leymus cinereus John Thomas Howell 1934-6-30 12275 Modoc Duncan Horse Camp. 1355 Comment
  GH365305  Leymus pacificus J. T. Howell 1948-6-6 24335 Unknown Stinson Beach Comment
  CAS-BOT-BC451679  Lilaea scilloides John Thomas Howell 1930-5-21 5194 Santa Clara 1 mile south of Morgan Hill Comment
  SDSU11955  Lilium bolanderi D. F. Howe 1963-7-6 3601 Del Norte Myrtle Creek on #199, Six Rivers National Forest. 91 Comment
  CAS-BOT-BC508274  Lilium kelleyanum John Thomas Howell 1946-7-15 22394 Inyo Between Mosquito Flat and Ruby Lake; Rock Creek Lake Basin Comment
  CAS-BOT-BC509448  Lilium kelleyanum John Thomas Howell 1940-8-10 16103 Fresno Junction Meadow, Bubbs Creek Comment
  CAS-BOT-BC509451  Lilium kelleyanum John Thomas Howell 1948-7-29 25186 Fresno Bubbs Creek Canyon 2834 Comment
  RSA216164  Lilium pardalinum J. T. Howell 1966-7-20 41994 Marin Area adjacent to the John Thomas Howell Botanical Garden, Tiburon. Comment
  UC750732  Linanthus bolanderi John Thomas Howell 1945-6-18 21007 Lake Sawmill Flat Bartlett Mountain 1219 Comment
  SD114162  Linanthus californicus Darley F. Howe 1947-3-22 1511 Los Angeles Topango Canyon, ca. 6.0 miles from ocean. Comment
Read comments
May 22 2014
  UC908711  Linanthus liniflorus J. T. Howell 1926-5-4 1969 Merced 8 mi ssw Merced Comment
  SD42634  Linanthus pungens Darley F. Howe 1947-6-26 1696 San Bernardino Top of ridge so. of Big Bear Valley Comment
  POM204108  Linanthus pungens subsp. pulchriflorus J. T. Howell 1934-7-4 12400 Siskiyou SE corner of Siskiyou County Comment
  CAS-BOT-BC111967  Lipocarpha micrantha John Thomas Howell 1950-8-30 27464 Tuolumne Gravelly flood bed of Tuolumne River at mouth of Moccasin Creek. 274 Comment
  CAS-BOT-BC430893  Lithophragma bolanderi John Thomas Howell; Gordon H. True; Barbara T. Menzies; Roberta Shockey 1978-4-5 52797 Calaveras Camp Nine Road northeast of Vallecito; Sierra Nevada 609 Comment
  CAS-BOT-BC430897  Lithophragma bolanderi John Thomas Howell 1960-6-6 35322 Fresno Kings Canyon road 8 miles W of Horsehoe Bend; Sierra Nevada 1463 Comment
  CAS-BOT-BC432308  Lithophragma campanulatum John Thomas Howell 1944-7-13 19744 Glenn Summit Ridge N of Black Butte Comment
  SD114234  Loeseliastrum schottii Darley F. Howe 1960-4-23 2873 San Bernardino 14 miles north of Essex, Mojave Desert 914 Comment
  CAS-BOT-BC269196  Lolium temulentum John Thomas Howell 1964-4-29 40697 Tuolumne At Tuolumne River bridge, 2.5 miles east of Jacksonville 198 Comment
  RSA201488A  Lomatium vaginatum J. T. Howell 1947-5-8 23145 Marin Sausalito Comment
  CAS-BOT-BC241406  Lonicera John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-22 54080 Yuba About 2 miles northeast of Dobbins on Oregon Hill Road 701 Comment
  SD44973  Lonicera hispidula var. californica Darley F. Howe 1952-6-22 2246 Monterey Santa Lucia Mountains. 299 Comment
  CAS-BOT-BC234803  Lonicera subspicata John Thomas Howell 1930-10-24 5633 Monterey 17.9 miles east of The Indians, Santa Lucia Mts. Comment
  CAS-BOT-BC198560  Lotus John Thomas Howell 1928-3-11 s.n. San Bernardino At eastern end of Morongo Valley. 914 Comment
  CAS-BOT-BC181960  Lotus denticulatus John Thomas Howell 1934-6-15 12204 Modoc Dorris Reservoir, 2 mi. E of Alturas. Comment
  UC1177174  Lotus grandiflorus John Thomas Howell 1944-4-2 19363 Marin Bolinas Ridge Comment
  SDSU4357  Lotus uliginosus D. F. Howe 1976-5-17 4892 Ventura Garretta road just off #159, .5 mile east of #101. Comment
Read comments
Sep 20 2014
  RSA114320  Ludwigia hexapetala J. T. Howell 1945-5-20 s.n. Marin Tiburon. Comment
  POM179684  Ludwigia palustris var. pacifica J. T. Howell 1930-10-12 5591 El Dorado North Fork of Cosumnes River, 6.5 miles north of Plymouth. Comment
  RSA502  Ludwigia peploides subsp. peploides J. T. Howell 1927-7-14 396 Orange Santa Ana River bottom, Rancho Santa Ana. 152 Comment
  UC860312  Luetkea pectinata John Thomas Howell 1939-8-2 14872 Siskiyou Spirit Lake; Marble Mts. Comment
  SD113675  Lupinus andersonii Darley F. Howe 1961-8-10 3157 Alpine Kirkwood on Carson Pass Road, #88 2347 Comment
  SD75833  Lupinus angustiflorus Darley F. Howe 1969-8-12 Mono Hillside east of Sonora Pass 2743 Comment
  CAS-BOT-BC196576  Lupinus argenteus var. meionanthus John Thomas Howell 1943-7-20 18600 Nevada Castle Peak Comment
  CAS-BOT-BC196602  Lupinus argenteus var. palmeri John Thomas Howell 1938-8-9 14444 Mono Between Mammouth [Mammoth] and Mineret [Minaret] Summit Comment
  UC1177459  Lupinus bicolor John Thomas Howell 1944-5-28 19530 Marin between Almonte and Mill Valley; between Almonte and Mill Valley Comment
  RSA223354  Lupinus bicolor subsp. microphyllus J. T. Howell 1967-4-30 42161 Tulare 4.5 miles ENE of Pixley. 84 Comment
  UC865066  Lupinus breweri John Thomas Howell 1938-8-2 14011 Placer at Brockway Brockway (sand hills on Lake Tahoe); Lake Tahoe Comment
  CAS-BOT-BC196728  Lupinus breweri var. breweri John Thomas Howell 1944-8-8 20103 Tuolumne Between Elizabeth Lake and Tuolumne Meadows Comment
  CAS-BOT-BC208888  Lupinus breweri var. breweri John Thomas Howell 1963-7-11 39835 El Dorado Tahoe Valley, 3 miles north of Meyers - Sierra Nevada 1911 Comment
  CAS-BOT-BC196783  Lupinus breweri var. bryoides John Thomas Howell 1950-7-22 27177 Tulare Olancha Peak 3200 Comment
  CAS-BOT-BC215069  Lupinus chamissonis John Thomas Howell 1939-6-18 14779 Marin Near Mud Lake Comment
  RSA88313  Lupinus densiflorus var. aureus J. T. Howell 1953-5-24 29016 Tuolumne Near Standard. 762 Comment
  CAS-BOT-BC216768  Lupinus excubitus var. excubitus John Thomas Howell; Gordon H. True 1971-6-16 47909 Kern 6 miles E of Claraville on road to Kelso Valley 1524 Comment
  CAS-BOT-BC202101  Lupinus magnificus var. glarecola John Thomas Howell 1958-5-24 33333 Inyo Whitney Portal road 1920 Comment
  SDSU4999  Lupinus obtusilobus D. F. Howe 1962-8-6 3400 Siskiyou Mt. Shasta, Shasta National Forest. 2438 Comment
  CAS-BOT-BC8308  Lupinus ochroleucus John Thomas Howell 1941-6-1 16244 Mariposa about midway between Briceburg and Mariposa Comment
  SEINET10450725  Lupinus ochroleucus John Thomas Howell 1941-6-1 Howell 16244 Mariposa About midway between briceberg and mariposa. Comment
  SEINET10486151  Lupinus polycarpus John Thomas Howell 1957-5-5 Howell 32176 San Francisco Serpentine slope, sierra and 22nd streets. San francisco. Comment
  CAS-BOT-BC8297  Lupinus pratensis John Thomas Howell 1940-7-31 15767 Tulare East Lake 2926 Comment
  SDSU5004  Lupinus pratensis D. F. Howe 1941-8-5 1180 Inyo Lone Pine Creek, Sierra Nevadas. 2743 Comment
  POM196443  Luzula comosa J. T. Howell 1927-3-13 2285 Marin Point San Quentin. Comment
  RSA44523  Luzula comosa J. T. Howell 1947-8-8 23896 Inyo Third to Fifth Lake, Big Pine Lakes. 3201 Comment
  CAS-BOT-BC436666  Luzula comosa var. laxa John Thomas Howell 1943-7-17 18446 Nevada West side of Donner Pass near Norden 2133 Comment
  CAS-BOT-BC441308  Luzula macrantha John Thomas Howell 1953-5-25 29036 Tuolumne Twain Harte 1127 Comment
  CAS-BOT-BC231945  Luzula orestera John Thomas Howell 1938-8-13 14570 Mariposa Snow Flat Comment
  CAS-BOT-BC236930  Luzula orestera John Thomas Howell 1940-8-1 15839 Tulare Between Reflection Lake and Harrison Pass 3505 Comment
  RSA26528  Luzula subcongesta J. T. Howell 1951-7-18 27919 Tulare West side, Franklin Pass, Mineral King and vicinity. 3354 Comment
  RSA0016030  Lythrum tribracteatum J. T. Howell 1930-5-30 5208 Solano 1 mile SW of Elmira. Comment
  RSA94363  Madia citriodora J. T. Howell 1934-7-4 12410 Siskiyou Between Timbered Crater and Little Hot Springs Valley Comment
  CAS-BOT-BC344081  Madia elegans John Thomas Howell 1951-7-22 28106 Tulare Mineral King and Vicinity. Mineral King 2377 Comment
  CAS-BOT-BC342934  Madia gracilis John Thomas Howell 1933-5-28 11368 Alameda Strawberry Canyon, Berkeley Hills Comment
  CAS-BOT-BC343249  Madia gracilis John Thomas Howell 1951-6-28 27645 Plumas Johnsville 1584 Comment
  CAS-BOT-BC343420  Madia gracilis John Thomas Howell; R. C. Barneby 1954-5-13 29543 Sierra North Fork Yuba River, 4 miles below Downieville 807 Comment
  CAS-BOT-BC343431  Madia gracilis John Thomas Howell 1937-7-22 13320 Siskiyou South Fork of Salmon River near Big Flat 1524 Comment
  CAS-BOT-BC343477  Madia gracilis John Thomas Howell 1955-6-13 30347 Trinity 6 miles southwest of Douglas City 609 Comment
  CAS-BOT-BC343357  Madia gracilis John Thomas Howell 1931-5-25 6549 Santa Barbara Mission Ridge, Santa Barbara Comment
  POM225353  Madia gracilis J. T. Howell 1931-5-25 6549 Santa Barbara Mission Ridge Comment
  CAS-BOT-BC345215  Madia sativa John Thomas Howell 1932-9-17 10764 Sonoma Near Kenwood Comment
  SDSU4746  Madia sativa D. F. Howe 1962-7-30 3372 Mendocino 1.8 miles north of Pt. Arena on #1. Comment
  CAS-BOT-BC511338  Maianthemum racemosum subsp. amplexicaule John Thomas Howell 1956-3-27 31242 A Monterey Santa Lucia Mountains, Bixby Creek Canyon Comment
  CAS-BOT-BC203977  Malacothamnus fasciculatus John Thomas Howell; T. H. Kearney 1950-8-27 27424 Santa Clara Pacheco Pass Road, 4 miles west of summit Comment
  SD42781  Malacothamnus fasciculatus D. F. Howe 1947-8-25 1731 San Bernardino Mill Creek Comment
  SDSU7519  Malacothamnus fasciculatus D. F. Howe 1963-7-1 San Benito 6.3 miles north of bitterwater on #25 Comment
  GH420520  Malacothamnus fremontii J. T. Howell 1937-7-18 13112 Unknown 2 miles north of Lower Lake Comment
  CAS-BOT-BC345275  Malacothrix californica John Thomas Howell 1958-5-25 33364 Inyo Carroll Creek 1676 Comment
  CAS-BOT-BC345462  Malacothrix coulteri John Thomas Howell 1931-3-20 5884 Kings 5 miles n. of Devil's Den Comment
  CAS-BOT-BC347351  Malacothrix floccifera John Thomas Howell; Gordon H. True 1967-5-29 42319 Inyo 1/3 mile east of head of Nine Mile Canyon 1828 Comment
  CAS-BOT-BC347560  Malacothrix floccifera John Thomas Howell 1937-5-20 12990 Santa Clara Coyote Creek, 3 miles east of Madrone Comment
  CAS-BOT-BC347705  Malacothrix glabrata John Thomas Howell 1928-3-11 3444 Riverside Coachella Valley, Colorado Desert 213 Comment
  SD112634  Malacothrix glabrata Darley F. Howe 1948-5-3 1794 Kern i mile north of Rosamond 669 Comment
Read comments
Mar 17 2014
  SD56802  Malacothrix incana Darley F. Howe 1963-5-18 3489 San Luis Obispo Oso Flaco Comment
  RSA54052  Malacothrix saxatilis var. tenuifolia J. T. Howell 1948-7-2 24769 Los Angeles Palos Verde Hills. Comment
  UC750640  Malva nicaeensis John Thomas Howell 1946-5-16 21900 San Francisco Van Ness Avenue at Fort Mason, San Francisco San Francisco; , Fort Mason, Van Ness Avenue Comment
  CAS-BOT-BC348188  Matricaria discoidea John Thomas Howell 1957-5-17 32246 San Francisco San Francisco. Bayview Hills Comment
  CAS-BOT-BC348110  Matricaria discoidea John Thomas Howell 1962-4-9 37082 Kern Kernville Comment
  CAS-BOT-BC348170  Matricaria discoidea John Thomas Howell 1959-9-26 35046 Plumas Near Keddie 1005 Comment
  RSA54042  Medicago arabica J. T. Howell 1948-4-18 24212 Sonoma Hills east of Agua Caliente. Comment
  UCD106744  Medicago minima John Thomas Howell 1953-5-22 28973 Stanislaus Knights Ferry. 60 Comment
  RSA220030  Medicago polymorpha J. T. Howell 1957-7-28 32846 San Francisco Third and Davidson Streets, San Francisco. Comment
  CAS-BOT-BC269236  Melica aristata John Thomas Howell 1951-7-19 27948 Tulare Mineral King and vicinity. Monarch Lakes Trail 2438 Comment
  SD53094  Melica aristata Darley F. Howe 1962-5-20 3257 Mendocino 9.1 miles north of Willits on #101 366 Comment
  CAS-BOT-BC271093  Melica bulbosa John Thomas Howell; Gordon H. True 1970-8-11 6193 Nevada Carpenter Ridge, Sagehen Creek drainage, ca. 7.5 miles west of Truckee - Sierraville Highway 2621 Comment
  CAS-BOT-BC269440  Melica californica John Thomas Howell 1957-5-17 32280 San Francisco San Francisco. Bayview Hills Comment
  CAS-BOT-BC282060  Melica fugax John Thomas Howell 1943-7-15 18365 Nevada Boreal Ridge. W side of Donner Pass near Norden 2133 Comment
  CAS-BOT-BC282073  Melica fugax John Thomas Howell 1937-7-21 13155 Siskiyou S Fork of Salmon River near Big Flat 1524 Comment
  CAS-BOT-BC282048  Melica fugax John Thomas Howell 1955-6-4 30274 Tuolumne Kennedy Meadow 1950 Comment
  CAS-BOT-BC281334  Melica harfordii John Thomas Howell 1941-5-25 16204 Marin Arturo Trail, Mt Tamalpais Comment
  CAS-BOT-BC280910  Melica imperfecta John Thomas Howell 1931-4-12 6285 Santa Barbara Cochie Canyon, Santa Cruz Island Comment
  CAS-BOT-BC264177  Melica subulata John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-23 54163 Plumas 3.25 miles west of Round Valley Reservoir Dam, Sierra Nevada 1633 Comment
  CAS-BOT-BC264160  Melica subulata John Thomas Howell 1945-8-5 s.n. Marin Dipsea Trail, head of Kent Ravine, Mt. Tamalpais Comment
  SD113591  Melilotus indicus Darley F. Howe 1915-6-3 71 Los Angeles Claremont Comment
  RSA0121878  Mentzelia dispersa J. T. Howell 1934-6-12 12042 Modoc North side of Fandango Valley. Comment
  SD114168  Mentzelia involucrata Darley F. Howe 1964-2-23 3726 San Diego 5.9 miles west of San Diego-Imperial County line on road to Caliente Hot Springs Comment
  SDSU8080  Mentzelia tricuspis D. F Howe 1969-4-12 4569 San Bernardino 13 miles east of Goffs. 502 Comment
Read comments
Oct 25 2011
  SD103811  Mentzelia veatchiana Darley F. Howe Jun 1978 Alpine Along highway 89, 10 miles south of Markleeville. Comment
  UC517555  Mentzelia veatchiana John Thomas Howell 1928-4-2 3670 Inyo near Dante's View; Black Mts. Comment
  SD112946  Mesembryanthemum crystallinum Darley F. Howe 1935-5-19 217 San Diego Otay Comment
  CAS-BOT-BC428882  Micranthes californica John Thomas Howell 1962-6-16 37637 Plumas Lewisia Rock, Feather River. 640 Comment
  CAS-BOT-BC348383  Micropus californicus var. californicus John Thomas Howell 1929-4-25 4197 Merced Hills bordering the San Joaquin Valley, 5 miles ne. of Merced Comment
  CAS-BOT-BC348666  Microseris acuminata John Thomas Howell 1930-4-13 4701 Calaveras 3 miles west of San Sndreas [Andreas] on road to Valley Springs Comment
  CAS-BOT-BC348749  Microseris bigelovii John Thomas Howell 1947-4-23 23061 Marin Drakes Estero west of Mt. Vision Comment
  CAS-BOT-BC348929  Microseris douglasii subsp. douglasii John Thomas Howell 1942-6-21 16979 Marin Carson Ridge Comment
  CAS-BOT-BC348936  Microseris douglasii subsp. douglasii John Thomas Howell 1941-5-25 16221 Marin Potrero Meadow, Mt. Tamalpais Comment
  POM203302  Microseris douglasii subsp. douglasii J. T. Howell 1931-4-3 6112 Napa Pope Creek, 7 miles from Monticello, Napa Range Comment
  CAS-BOT-BC349185  Microseris elegans John Thomas Howell 1931-4-4 6170 Napa Napa Valley at Myrtledale Hot Springs Comment
  CAS-BOT-BC322798  Microseris sylvatica John Thomas Howell 1971-6-17 48045 Kern 1 mile east of Bodfish Gap, Sierra Nevada 1310 Comment
  CAS-BOT-BC9701  Mimulus barbatus John Thomas Howell; Thomas C. Fuller; G. Douglas Barbe 1980-7-16 53863 Tulare Paloma Meadows, Kern Plateau 2590 Comment
  CAS-BOT-BC9736  Mimulus deflexus John Thomas Howell 1949-7-18 25465 Inyo Cottonwood Lakes 3352 Comment
  SBBG28944  Mimulus douglasii J. T. Howell 1940-5-19 Napa upper Saint Helena Crk Comment
  RSA727  Mimulus floribundus Thomas Howell 1927-7-27 492 Orange Santa Ana River bottom. Comment
  RSA78609  Mimulus nanus var. nanus J. T. Howell 1944-7-13 19740 Glenn Summit north of Black Butte. Comment
  CAS-BOT-BC174577  Minuartia californica John Thomas Howell 1948-4-18 24207 Sonoma Hills east of Agua Caliente Comment
  CAS-BOT-BC174679  Minuartia cismontana John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-5-17 52980 Calaveras 2 1/2 miles sw. of Avery on Sheepranch road 1036 Comment
  CAS-BOT-BC388681  Minuartia douglasii John Thomas Howell 1940-5-26 15529 Marin Little Carson Falls Comment
  CAS-BOT-BC388727  Minuartia douglasii John Thomas Howell 1955-5-21 30239 Monterey Hastings Reservation, Santa Lucia Mts. Comment
  CAS-BOT-BC388597  Minuartia douglasii John Thomas Howell; Walter Knight; Irja Knight; Gordon True 1968-6-11 2349 Plumas Butterfly Botanical Area. Confluence of Spanish Creek & Butterfly Creek Comment
  CAS-BOT-BC388758  Minuartia douglasii John Thomas Howell 1933-6-4 11393 Napa Hills east of Napa Comment
  CAS-BOT-BC388918  Minuartia douglasii John Thomas Howell; Gordon H. True 1968-5-14 44379 Tulare Cherry Hill Road at Rincon Trail, Brush Creek Canyon. Kern Plateau 1463 Comment
  SDSU2961  Minuartia howellii D. F. Howe 1969-5-31 4605 Del Norte Rowdy Creek Road. 518 Comment
  CAS-BOT-BC174705  Minuartia nuttallii John Thomas Howell 1947-7-25 23679 San Bernardino Mt. San Gorgonio, San Bernardino Mts. 3505 Comment
  CAS-BOT-BC181598  Minuartia nuttallii var. gracilis John Thomas Howell 1949-7-25 25748 Tulare Siberian Pass Creek 3352 Comment
  CAS-BOT-BC181602  Minuartia nuttallii var. gracilis John Thomas Howell 1958-8-1 34157 Fresno Ridge north of Dougherty Meadow - Sierra Nevada 3048 Comment
  NY446330  Minuartia rubella J. T. Howell 1946-7-26 22774 Inyo Mono Mesa 3657.6 Comment
  SD129847  Mirabilis laevis var. crassifolia Melanie Howe 1990-2-10 73 San Diego Along trail on hillside above corner lot at intersection of Golfcrest & Mission Gorge. (IPB 1/06) Comment
  CAS-BOT-BC433001  Mitella breweri John Thomas Howell 1940-7-30 15719 Tulare East Lake 2926 Comment
  SDSU7210  Monardella breweri D. F Howe 1976-6-2 4924 Ventura 0.1 mile north of Santa Rosa valley Blvd on Las Posas Rd. 213 Comment
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May 29 2015
  SD158302  Monardella lanceolata Melanie Howe, Margaret McIntosh 1998-7-31 San Diego Near Iron Mountain, next to trail leading to Table Rock (mak 2/06) 671 Comment
  RSA670  Monardella lanceolata var. lanceolata J. T. Howell 1927-6-11 87 San Bernardino Highland Avenue, east of Upland. 305 Comment
  SD45583  Monardella linoides Darley F. Howe 1953-8-16 2303 San Bernardino San Bernardino Peak, trail from Glen Martin 1981 Comment
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Jun 26 2012
  SD50767  Monardella odoratissima subsp. glauca Darley F. Howe none given Mono 14 miles west of #395 on Sonora Pass Road 2743 Comment
  SD149145  Monardella odoratissima subsp. pallida John Thomas Howell 1975-7-22 51370 Plumas 2.0 miles northwest of Spring Garden. 1173 Comment
  RSA40024  Monolepis spathulata J. T. Howell 1944-8-9 20191 Tuolumne Near Parsons Lodge, Tuolumne Meadows Comment
  POM259580  Monolopia gracilens J. T. Howell 1937-5-20 12991 Santa Clara Coyote Creek, 3 miles east of Madrone. Comment
  CAS-BOT-BC349509  Monolopia lanceolata John Thomas Howell 1931-3-23 5992 Monterey Poncho Rico Canyon, 6 miles east of San Bernardo Comment
  CAS-BOT-BC444782  Montia chamissoi John Thomas Howell; Gordon H. True 1967-8-7 43487 Tulare Beach Creek just north of Beach Meadow. Kern Plateau. 2377 Comment
  CAS-BOT-BC444934  Montia fontana John Thomas Howell 1956-3-24 31152 Monterey Santa Lucia Mountains. About 5 miles north of Jolon Comment
  CAS-BOT-BC445093  Montia linearis John Thomas Howell; Gordon H. True 1967-6-11 42576 Plumas Meadow at Quincy 1036 Comment
  SD51069  Mortonia utahensis Darley F. Howe 1960-4-27 2891 Inyo Pass through Nopah Mountains, 4.0 miles on road east of Shoshone. 760 Comment
  SD56726  Mucronea californica Darley F. Howe 1963-6-29 3561 Santa Barbara 1.3 mi. from #1 on Vandenberg Air Force Rd. 91 Comment
  CAS-BOT-BC263345  Muhlenbergia andina John Thomas Howell 1970-9-22 47314 Tulare Fairview, Sierra Nevada 1066 Comment
  CAS-BOT-BC260552  Muhlenbergia filiformis John Thomas Howell 1948-7-22 24864 Fresno Bubbs Creek Canyon in vicinity of Vidette Meadows 3048 Comment
  CAS-BOT-BC263803  Muhlenbergia filiformis John Thomas Howell 1944-8-5 19931 Tuolumne Soda Springs, Tuolumne Meadows Comment
  CAS-BOT-BC263807  Muhlenbergia filiformis John Thomas Howell 1944-8-5 19930 Tuolumne Soda Springs, Tuolumne Meadows Comment
  CAS-BOT-BC267043  Muhlenbergia filiformis John Thomas Howell 1937-7-25 13445 Siskiyou Caribou Basin, Salmon - Trinity Alps 2286 Comment
  SDSU3276  Muhlenbergia filiformis D. F. Howe 1964-7-21 3855 Fresno Meadow 6.3 miles on road east of Huntington Lake, Sierra National Forest 2835 Comment
  UCD86660  Muhlenbergia filiformis John Thomas Howell 1943-7-14 18324 Nevada West side of Donner Pass near Norden. 2133 Comment
  SEINET10600079  Muhlenbergia montana John Thomas Howell 1944-8-14 Howell 20468 Tuolumne Tuolume Canyon above Glen Aulin, Comment
  CAS-BOT-BC275019  Muhlenbergia richardsonis John Thomas Howell; Gordon H. True 1967-9-19 43868 Tulare Flood plain of Kern River S Fork, Kennedy Meadows Campground, Kern Plateau 1859 Comment
  CAS-BOT-BC274908  Muhlenbergia rigens John Thomas Howell 1951-8-21 28292 Nevada Grass Valley 731 Comment
  CAS-BOT-BC392268  Myosurus apetalus John Thomas Howell 1962-6-19 37865 Plumas 5.8 miles e. of Beckwourth 1493 Comment
  NY1082235  Nama rothrockii J. T. Howell 1958-5-27 33518 Inyo Sierra Nevada. Bishop Creek 2042 Comment
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Jun 5 2012
  CAS-BOT-BC259879  Nassella cernua John Thomas Howell 1928-4-22 3753 Ventura At Point Mugu Comment
  UC1106126  Nassella cernua John Thomas Howell 1946-5-19 21916 Marin Carson Ridge Comment
  CAS-BOT-BC259990  Nassella lepida John Thomas Howell 1957-5-28 32518 San Francisco NW side of Lone Mountain, San Francisco Comment
  CAS-BOT-BC260039  Nassella lepida John Thomas Howell 1931-4-10 6202 Santa Barbara Valle del Medio, Santa Cruz Island Comment
  GH361605  Nassella lepida J. T. Howell 1946-5-19 21916 Unknown Carson Ridge Comment
  CAS-BOT-BC260144  Nassella pulchra John Thomas Howell 1947-4-4 s.n. Marin San Raphael Hills Comment
  UCD87552  Nassella pulchra John Thomas Howell 1977-5-29 52363 San Francisco Fillmore and McAllister streets, San Francisco. Comment
  POM203802  Navarretia breweri J. T. Howell 1934-6-12 11988 Merced 9 miles S of Davis Creek Comment
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Jan 3 2022
  GH385264  Navarretia cotulifolia J. T. Howell 1938-5-28 13806 Unknown Near Hollister Comment
  RSA580  Navarretia hamata J. T. Howell 1927-8-7 605 San Diego Near Dulzura Ranch. 335 Comment
  JEPS15003  Navarretia heterodoxa John Thomas Howell 1937-7-4 13056 Napa Wooden Valley Grade Comment
  UC856837  Navarretia mellita John Thomas Howell 1938-6-30 13938 Contra Costa Head of Siesta Valley Comment
  CAS-BOT-BC232742  Navarretia sinistra subsp. pinnatisecta John Thomas Howell 1955-7-17 30719 Trinity Near Hayfork 731 Comment
  UCD48704  Navarretia tagetina John Thomas Howell 1953-5-24 29021 Tuolumne Near Chinese Camp, Tuolumne Co. 381 Comment
  UC526145  Navarretia viscidula John Thomas Howell 1934-6-17 12232 Tehama near Cottonwood Comment
  SEINET10906128  Nemacladus interior John Thomas Howell, Rupert C. Barneby 1954-5-11 Howell 29415 Madera Burn, 2 miles west of Oakhurst 671 Comment
  SD113510  Nemacladus pinnatifidus Darley F. Howe 1940-6-7 1022 San Diego Base of old Viejas Grade Comment
  SEINET10972559  Nemacladus secundiflorus Howell 1958-5-22 Howell 33166 Tulare Kern River Canyon near Roads End Post Office 1067 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
  CAS-BOT-BC260314  Neostapfia colusana John Thomas Howell; Catherine Best; Wilma Follette; Gordon True 1981-5-21 54035 Solano Jepson Prairie Preserve of The Nature Conservancy, in the vicinity of Olcutt Lake about 12 miles S of Dixon 6 Comment
  SD50723  Notholithocarpus densiflorus Darley F. Howe 1959-7-27 2816 Santa Barbara Santa Inez mountains, 15 miles west of San Marcus Pass 1157 Comment
  SDSU6709  Notholithocarpus densiflorus D. F. Howe 1961-7-24 3066 Santa Cruz 3 miles eat of the Big Basin. 427 Comment
  CAS-BOT-BC516043  Nothoscordum gracile John Thomas Howell 1958-6-17 33630 San Francisco Divisadero Street, near Golden Gate Ave., San Francisco Comment
  SD114174  Oenothera primiveris subsp. bufonis Darley F. Howe 1969-5-17 4595 San Bernardino Clark Mountain 1768 Comment
  SD113592 Image available Olneya tesota Darley F. Howe 1954-5-23 2357 San Diego Agua Caliente Hot Springs. Comment
  CAS-BOT-BC349972  Oreostemma alpigenum var. andersonii John Thomas Howell 1958-8-13 34390 Madera Near Isberg Lake 2987 Comment
  CAS-BOT-BC350070  Oreostemma alpigenum var. andersonii John Thomas Howell 1944-8-12 20390 Tuolumne Gaylor Lakes 3291 Comment
  CAS-BOT-BC355616  Oreostemma alpigenum var. andersonii John Thomas Howell 1949-7-21 25565 Tulare Rock Creek 3200 Comment
  SDSU6321  Oreostemma alpigenum var. andersonii D. F. Howe 1941-8-8 1393 Inyo Lone Pine Creek, Sierra Nevadas. 3139 Comment
  CAS-BOT-BC327734  Oreostemma peirsonii John Thomas Howell 1949-7-25 25719 Tulare Siberian Pass Creek 3352 Comment
  CAS-BOT-BC499887  Orobanche fasciculata John Thomas Howell 1962-7-8 38229 Kern Sierra Nevada, Greenhorn Mountains. Black Mt., south side 1127 Comment
  CAS-BOT-BC499918  Orobanche fasciculata John Thomas Howell 1927-5-8 2377 Marin East slope of Mt. Tamalpais Comment
  SEINET6031105  Orobanche fasciculata J. T. Howell, G. H. True., Jr. 1971-6-14 47691 Kern East slope of Greenhorn Range, 5 mi. east of Wofford 1280 Comment
  CAS-BOT-BC355698  Orochaenactis thysanocarpha John Thomas Howell 1949-8-7 26112 Tulare Rock Creek 3169 Comment
  POM180617  Orthocarpus faucibarbatus var. albidus J. T. Howell 1930-6-8 5278 Sonoma Hillside overlooking the ocean, 8 miles N of Bodega Bay Comment
  POM204483  Orthocarpus purpurascens J. T. Howell 1933-4-22 11065 San Benito Between Paicines and Pinnacles P.O. Comment
  UCD110795  Oxalis micrantha John Thomas Howell 1946-6-20 22099 Marin Stinson Beach. Comment
  SDSU9642  Oxyria digyna D. F. Howe 1941-8-9 1301 Inyo Lone Pine Creek, Sierra Nevada. 3353 Comment
  CAS-BOT-BC413247  Oxytheca dendroidea subsp. dendroidea John Thomas Howell 1959-9-25 35026 Plumas Summit of Beckwourth Pass 1588 Comment
  RSA189  Oxytheca trilobata J. T. Howell 1928-7-8 1047 Riverside Santa Ana Mountains above Glen Ivy 1220 Comment
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Jun 22 2019
  CAS-BOT-BC318277  Packera breweri John Thomas Howell 1957-5-19 32346 Stanislaus Mt. Oso. 1005 Comment
  CAS-BOT-BC316776  Packera cana John Thomas Howell 1949-7-23 25648 Tulare Soldier Lake 3352 Comment
  CAS-BOT-BC50277  Packera eurycephala var. eurycephala John Thomas Howell 1934-6-11 11915 A Modoc Parker Creek. 1584 Comment
  CAS-BOT-BC316879  Packera eurycephala var. eurycephala John Thomas Howell 1935-5-12 12626 Napa Pope Creek Canyon 1 mile below Samuels Springs Comment
  SD51373  Packera multilobata Darley F. Howe 1961-6-19 3052 Inyo 9 miles north of Westgard Pass, White Mts. 3050 Comment
  CAS-BOT-BC317197  Packera werneriifolia John Thomas Howell 1948-7-20 24794 Inyo Mt. Gould, Fresno-Inyo Co. line. 3810 Comment
  CAS-BOT-BC317211  Packera werneriifolia John Thomas Howell 1944-8-10 20263 Mono Glacier Canyon, Mt. Dana. Comment
  CAS-BOT-BC10429  Paeonia brownii J. T. Howell 1934-6-14 12146 Lassen Near Lost Lake, Warner Mountains 2438 Comment
  CAS-BOT-BC121013  Paeonia brownii J. T. Howell; T. C. Fuller; G. D. Barbe 1981-6-24 54235 Plumas About 4 miles south of Mt. Hough Road 1645 Comment
  CAS-BOT-BC327864  Palafoxia arida John Thomas Howell 1927-11-26 3238 San Diego Central Borrego Valley, w. Colorado Desert 182 Comment
  UCD89807  Panicum capillare subsp. hillmanii John Thomas Howell 1973-7-10 49808 Lassen Doyle. Comment
  CAS-BOT-BC272306  Pappostipa speciosa John Thomas Howell; Gordon H. True 1967-7-3 42807 Tulare Between Lamont Meadow and Long Valley, Kern Plateau, Sierra Nevada 1767 Comment
  CAS-BOT-BC274078  Pappostipa speciosa John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-8-13 54572 Mono 0.7 mile south of Paradise Camp on Old Sherwin Grade Road 1463 Comment
  CAS-BOT-BC274135  Pappostipa speciosa John Thomas Howell; Gordon H. True 1969-5-15 45783 Kern Kern River Canyon 9 miles from mouth of canyon 548 Comment
  CAS-BOT-BC253954  Parapholis incurva John Thomas Howell 1963-5-18 39380 Monterey Elkhorn Slough Comment
  CAS-BOT-BC413446  Parietaria judaica John Thomas Howell 1973-4-19 49144 Monterey Pacific Grove Comment
  UC1177428  Paronychia franciscana John Thomas Howell 1941-6-8 16259 Marin hills ne San Rafael Comment
  UC571151  Parvisedum pumilum John Thomas Howell 1929-4-11 4147 Merced 7 1/2 mi sw of Merced (on Los Banos Road, San Joaquin Valley,); San Joaquin Valley, Los Banos Road 45 Comment
  CAS-BOT-BC259689  Paspalum dilatatum John Thomas Howell 1946-8-17 22860 Sonoma Cunningham Marsh Comment
  CAS-BOT-BC259716  Paspalum distichum John Thomas Howell 1963-8-5 39935 Monterey Along Watsonville - San Juan Road, about 2 miles S of Aromas Comment
  CAS-BOT-BC202835  Paxistima myrsinites John Thomas Howell 1937-7-23 13369 Siskiyou South Fork of Salmon River near Big Flat 1524 Comment
  SDSU3977  Pectocarya penicillata D. F. Howe 1946-6-2 1524 San Bernardino Highway between Adelanto & Hesperia, Mojave Desert. Comment
  UC886594  Pedicularis bracteosa var. flavida John Thomas Howell 1939-8-3 15010 Siskiyou Spirit Lake; Marble Mountains Comment
  SDSU10866  Pedicularis semibarbata D. F. Howe 1947-6-23 1625 San Bernardino Furnace Creek N of Holcomb Valley, San Bernardino Mtns. Comment
  CAS-BOT-BC71299  Pellaea mucronata John Thomas Howell 1960-6-8 35456 Fresno 2 mi. westerly from Sequoia Lake 1524 Comment
  SD61052  Penstemon anguineus Darley F. Howe 1964-8-7 3945 Humboldt 8.2 mi. from #96 on Mill Creek Road. Hoopa Valley 1067 Comment
  SD64392  Penstemon azureus Darley F. Howe 1966-6-13 Nevada South side of Bear Valley, 26.3 miles east of Nevada City on hwy. #20 1615 Comment
  NY572628  Penstemon caesius J. T. Howell 1970-6-24 46716 Tulare North Manter Creek, Big Meadow to Manter Meadow. Kern Plateau. 2347.0 Comment
  CAS-BOT-BC265491  Penstemon heterodoxus John Thomas Howell 1948-7-24 24960 Fresno Bullfrog Lake 3240 Comment
  NY627264  Penstemon neotericus J. T. Howell 1973-7-10 49758 Lassen Near Westwood, Sierra Nevada 1554.5 Comment
  CAS-BOT-BC239600  Penstemon rydbergii var. oreocharis John Thomas Howell 1951-6-28 27642 Plumas Johnsville 1584 Comment
  SDSU10963  Penstemon rydbergii var. oreocharis D. F. Howe 1964-7-30 2677 Mono 13 miles W of #395, on Sonora Pass Road. 2743 Comment
  SD141836  Penstemon spectabilis Melanie Howe 1989-6-10 63 San Diego Hot Springs Mountain, Los Coyotes Indian Reservation. (IPB 11/06) Comment
  SDSU10979  Penstemon stephensii D. F. Howe 1960-4-24 2879 San Bernardino 10 miles N of road to Mitchell's Cavern, E face of Providence Mtns. 1219 Comment
  SD60975  Penstemon thurberi Darley F. Howe 1964-5-15 3763 San Bernardino Kelso sand dunes 762 Comment
  CAS-BOT-BC327982  Pentachaeta alsinoides John Thomas Howell 1941-6-29 s.n. Marin Angel Island, SE side Comment
  CAS-BOT-BC327995  Pentachaeta alsinoides John Thomas Howell 1933-6-4 11386 Napa Hills E of Napa Comment
  RSA926  Pentachaeta aurea J. T. Howell 1927-8-2 554 Riverside Near Strawberry Valley, Mt. San Jacinto. 1677 Comment
  CAS-BOT-BC71564  Pentagramma pallida John Thomas Howell; R. C. Barneby 1954-5-11 29457 Mariposa 4 miles south of Mormon Bar 441 Comment
  CAS-BOT-BC222768  Perideridia parishii John Thomas Howell 1969-9-13 46119 Sierra Little Truckee River near outlet of Webber Lake 2042 Comment
  CAS-BOT-BC222783  Perideridia parishii John Thomas Howell; Gordon H. True 1968-5-13 44335 Tulare Cherry Hill Road at Rincon Trail, Brush Creek Canyon, Kern Plateau 1463 Comment
  CAS-BOT-BC356058  Perityle emoryi John Thomas Howell 1928-4-21 3733 Ventura At Pt. Mugu 60 Comment
  CAS-BOT-BC413730  Persicaria hydropiper John Thomas Howell 1961-9-23 36847 Plumas Indian Valley 1082 Comment
  CAS-BOT-BC419016  Persicaria lapathifolia J. T. Howell 1987-7-30 s.n. Marin Community Vegetable Garden, Nova Albion St. across from Cermenho Ct., San Rafael Comment
  CAS-BOT-BC419215  Persicaria maculosa John Thomas Howell 1924-7-24 481 Mariposa Wawona 1219 Comment
  CAS-BOT-BC419342  Persicaria punctata John Thomas Howell 1942-8-30 s.n. Marin Muir Beach Comment
  NY1052549  Phacelia bicolor J. T. Howell 1958-5-27 33503 Inyo Bishop Creek 2133.6 Comment
  RSA201453  Phacelia californica J. T. Howell 1947-6-18 23252 Marin Salmon Creek - Chileno Valley summit. Comment
  RSA594  Phacelia cicutaria var. hispida J. T. Howell 1927-7-26 477 Orange Claymine Canon near Sierra Peak. 244 Comment
  RSA112768  Phacelia ciliata J. T. Howell 1929-4-25 4192 Merced Five miles northeast of Merced. Comment
  GH402967  Phacelia ciliata var. opaca J. T. Howell 1929-5-19 4210 Unknown Low clay hills, 5 miles northwest of Merced Comment
  SD113324  Phacelia crenulata var. ambigua Darley F. Howe 1958-4-12 San Bernardino East base of Bristol Mountains, Mojave Desert. Comment
  POM299080  Phacelia distans J. T. Howell 1930-8-3 5437 Monterey Point Lobos. Comment
  SD112818  Phacelia distans Darley F. Howe 1937-4-10 482 San Diego Borrego Valley Comment
  POM299068  Phacelia distans J. T. Howell 1928-6-24 2590 Orange Olinda. 152 Comment
  UC702989  Phacelia distans John Thomas Howell 1928-5-27 3856 Ventura between Cuddy Ranch and Lockwood Valley; Mt. Pinos region Comment
  POM299309  Phacelia douglasii var. petrophila J. T. Howell 1931-3-18 5858 Fresno At head of Oil Canyon. Comment
  SD113336  Phacelia hastata subsp. compacta Darley F. Howe 1958-7-28 2641 Mono 1 mi. N of Crest View Camp 2440 Comment
  SD71221  Phacelia imbricata John Thomas Howell 1947-6-18 23252 Marin Salmon Creek, Chileno Valley summit. Comment
  SD72116  Phacelia mutabilis John Thomas Howell 1958-8-2 34235 Fresno Sierra Nevada mtns: Along Kings Canyon road in burned area at Cherry Gap. Comment
  RSA597  Phacelia parryi J. T. Howell 1928-6-29 1000 Los Angeles Seminole Hot Springs Road, Santa Monica Mountains 457 Comment
  UCR95797  Phacelia purpusii J. T. Howell 1960-6-7 35410 Fresno Sierra Nevada Mtns, Kings Canyon Road, 6.5 mi NE of Cherry Gap 1555 Comment
  GH401063  Phacelia ramosissima J. T. Howell 1928-6-14 3894 Unknown Surprise Canyon, Panamint Mts. 2286 Comment
  CAS-BOT-BC159058  Phacelia ramosissima var. austrolitoralis John Thomas Howell 1931-5-27 6554 Ventura Dune 10 miles nw. of Ventura Comment
  CAS-BOT-BC159067  Phacelia ramosissima var. eremophila John Thomas Howell 1943-7-16 18408 Nevada West side of Donner Pass near Norden 2133 Comment
  CAS-BOT-BC159010  Phacelia ramosissima var. latifolia John Thomas Howell 1958-5-22 33088 Tulare Kern River Canyon 6 miles south of Roads End Post Office 944 Comment
  CAS-BOT-BC356067  Phalacroseris bolanderi John Thomas Howell 1958-8-9 34236 Madera Jackass Meadow 2133 Comment
  SD53142  Phalacroseris bolanderi Darley F. Howe 1962-8-17 3446 Fresno 15.6 miles east of Shaver Lake on #168, Sierra National Forest 2225 Comment
  CAS-BOT-BC265770  Phalaris aquatica John Thomas Howell 1946-6-13 22018 Marin Ignacio Comment
  CAS-BOT-BC265788  Phalaris aquatica John Thomas Howell 1963-5-18 39342 Monterey Near Aromas Comment
  CAS-BOT-BC265833  Phalaris arundinacea John Thomas Howell 1951-8-21 28236 Plumas Mohawk, Sierra Nevada 1371 Comment
  CAS-BOT-BC265871  Phalaris canariensis John Thomas Howell 1957-5-22 32398 San Francisco Bayview Hills, San Francisco Comment
  CAS-BOT-BC265918  Phalaris lemmonii John Thomas Howell; R. C. Barneby 1954-5-8 s.n. Tulare Tule River Valley, 4.5 miles below Springville, Sierra Nevada 243 Comment
  UCD88997  Phalaris lemmonii John Thomas Howell 1971-3-23 47586 Merced At San Joaquin River bridge, 5 miles NE of Gustine. 24 Comment
  CAS-BOT-BC250635  Phalaris minor John Thomas Howell 1956-6-3 31469 San Francisco At east end of Shafter St., San Francisco Comment
  CAS-BOT-BC250745  Phalaris paradoxa John Thomas Howell; Walter Knight; Irja Knight 1987-6-4 6243 Sonoma Todd Road Preserve 24 Comment
  CAS-BOT-BC128861  Philadelphus John Thomas Howell 1962-6-16 37635 Plumas Lewisia Rock, Feather River North Fork - Sierra Nevada 640 Comment
  CAS-BOT-BC77436  Philadelphus lewisii John Thomas Howell 1937-7-26 13560 Siskiyou Between Big Flat and Caribou Gulch Comment
  UCD89311  Phleum alpinum John Thomas Howell; Gordon True 1967-8-7 43458 Tulare On Beach Creek just north of Beach Meadow. Kern Plateau. 2377 Comment
  SD114157  Phlox speciosa subsp. nitida Darley F. Howe 1977-7-5 5001 Siskiyou Area north of Mt. Shasta. 1463 Comment
  CAS-BOT-BC58305  Phoenicaulis cheiranthoides John Thomas Howell 1934-6-13 12104 Modoc North Fk. of Barber Creek. 1828 Comment
  CAS-BOT-BC222602  Pholistoma auritum var. auritum John Thomas Howell 1927-6-17 s.n. Orange Santa Ana Canon [Canyon] 152 Comment
  SD50780  Pholistoma auritum var. auritum D. F. Howe 1959-8-18 Santa Barbara Refugio Pass, Santa Inez Mts. Comment
  CAS-BOT-BC134929  Phoradendron bolleanum John Thomas Howell 1948-4-26 24270 Kern Tehachapi Mts. 7 miles from Mohave Comment
  CAS-BOT-BC134936  Phoradendron bolleanum John Thomas Howell 1970-9-23 47325 Kern Near Tiger Flat, E side of Sunday Peak. Greenhorn Mountains. Sierra Nevada 1981 Comment
  RSA41421  Phoradendron juniperinum subsp. juniperinum D. F. Howe 1948-8-2 s.n. San Bernardino Holcomb Valley. 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-BC141279  Phoradendron serotinum subsp. tomentosum John Thomas Howell 1962-9-22 38703 Kern 1.5 miles W of Wofford. Greenhorn Moutains. Sierra Nevada 914 Comment
  CAS-BOT-BC141323  Phoradendron serotinum subsp. tomentosum John Thomas Howell 1960-5-2 35262 Mariposa Hwy 49 SE of Coulterville. Sierra Nevada Comment
  UCD126759  Physalis lancifolia John Thomas Howell 1967-11-3 44058 Tulare near north fence, about 4.5 miles ENE of Pixley, Valley Grassland. 83 Comment
  JEPS8966  Physalis philadelphica John Thomas Howell 1927-7-28 2869 Orange Santa Ana Canyon, Rancho Santa Ana Santa Ana Canyon; , Rancho Santa Ana 152 Comment
  UCD98430  Phytolacca heterotepala John Thomas Howell 1959-10-2 35095 San Francisco Near Academy buildings, Golden Gate Park. Comment
  RSA201396  Phytolacca heterotepala J. T. Howell 1959-8-28 34602 San Francisco Vacant lot, Geary Street between Gough and Franklin Streets, San Francisco. Comment
  CAS-BOT-BC71805  Pilularia americana John Thomas Howell 1929-4-20 4176 Merced 2 miles NW. of Merced on Oakdale Road 51 Comment
  CAS-BOT-BC78413  Pinus balfouriana John Thomas Howell 1940-8-8 16061 Tulare Between Reflection Lake and Harrison Pass Comment
  NY49387  Pinus balfouriana J. T. Howell 1970-6-25 46799 Tulare This specimen represents an endangered or threatened species. The specific locality has been removed from this record to protect this species from over-collection. These data may be supplied to researchers on request. Comment
  UC336179  Pinus contorta subsp. bolanderi M. A. Howe 1896-5-5 Mendocino near Mendocino City (White Plains) Comment
  CAS-BOT-BC73237  Pinus contorta subsp. murrayana John Thomas Howell 1946-7-26 22769 Inyo Mono Mesa 3657 Comment
  CAS-BOT-BC73214  Pinus flexilis John Thomas Howell 1947-8-3 23699 Inyo Big Pine Creek Trail 3048 Comment
  CAS-BOT-BC78706  Pinus jeffreyi John Thomas Howell; Gordon H. True 1970-7-14 5517 Sierra At Verdi Peak Lookout, Verdi Range 2560 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-BC72826  Pinus ponderosa John Thomas Howell 1960-8-20 36206 Tehama Near Lassen Volcanic National Park, Morgan 1463 Comment
  CAS-BOT-BC80002  Pinus radiata John Thomas Howell 1964-6-28 40723 San Luis Obispo near Cambria, adjacent to the Protestant Cemetery (where the cones were collected) Comment
  CAS-BOT-BC254430  Piptatherum miliaceum John Thomas Howell 1956-7-1 31635 San Francisco Embarcadero and Lombard Street, San Francisco Comment
  CAS-BOT-BC254402  Piptatherum miliaceum John Thomas Howell 1954-10-30 30114 Alameda Vacant lot, Arlington Avenue near city limits, Berkeley Comment
  SD72393  Plagiobothrys arizonicus Darley F. Howe 1968-3-23 Inyo Seven miles north of Trona. Comment
  POM226098  Plagiobothrys bracteatus J. T. Howell 1933-5-14 11232 Contra Costa St. Mary s College Comment
  POM204149  Plagiobothrys greenei J. T. Howell 1934-3-27 11803 Sonoma Summit of Bennett Valley road from Glen Ellen to Santa Rosa Comment
  CAS-BOT-BC230961  Plagiobothrys hispidulus John Thomas Howell 1962-6-18 37746 Plumas Sierra Valley near Beckwourth 1487 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
  RSA39949  Plagiobothrys scouleri var. hispidulus J. T. Howell 1943-7-19 18581 Placer Summit Valley Comment
  GH420180  Plagiobothrys scouleri var. penicillatus J. T. Howell 1934-6-12 12034 Unknown Plum Valley, Warner Mts. Comment
  POM226100  Plagiobothrys stipitatus J. T. Howell 1933-4-1 10922 Sonoma Petaluma Comment
  CAS-BOT-BC189649  Plagiobothrys torreyi John Thomas Howell 1924-5-30 357 Mariposa Wawona 1219 Comment
  CAS-BOT-BC230631  Plagiobothrys torreyi John Thomas Howell 1944-8-7 20101 Tuolumne Tuolumne Meadows, Near Parsons Lodge Comment
  CAS-BOT-BC228500  Plagiobothrys uncinatus John Thomas Howell 1937-5-19 12950 San Benito The Pinnacles Comment
  SD71286  Plantago erecta John Thomas Howell 1957-5-17 32283 Alameda Bayview Hills, San Francisco Comment
  SD64364  Plantago indica Darley F. Howe 1966-8-27 Siskiyou 8.5 miles north of Weed on Highway 97. 1189 Comment
  JEPS74316  Plantago major John Thomas Howell 1973-7-25 49980 Merced Gustine, city park Gustine 30 Comment
  UC710605  Plantago truncata subsp. firma John Thomas Howell 1944-5-21 19500 Marin n side Mt. Tamalpais; , Lagunitas Meadows 243 Comment
  CAS-BOT-BC93151  Platanus racemosa John Thomas Howell 1973-7-25 49956 Stanislaus Orestimba Creek bottom at Interstate Highway 5, westeren Stanislaus county. Comment
  CAS-BOT-BC92075  Platystemon californicus John Thomas Howell 1930-4-6 4672 Santa Clara San Antonio Valley. Comment
  JEPS58883  Plectritis macrocera John Thomas Howell 1946-4-13 21599 Marin Summit meadow to Rock Spring, Mount Tamalpais Rock Spring; Mount Tamalpais Comment
  CAS-BOT-BC244403  Poa annua John Thomas Howell 1961-9-22 36719 Butte Bank of Feather River, Oroville 53 Comment
  CAS-BOT-BC255628  Poa annua John Thomas Howell; Gordon H. True 1967-7-4 43000 Tulare 3.4 miles S of Troy Meadow, Kern Plateau 2286 Comment
  CAS-BOT-BC255052  Poa compressa John Thomas Howell; Gordon H. True 1968-6-9 44516 Placer Alta 1066 Comment
  CAS-BOT-BC254629  Poa cusickii subsp. epilis John Thomas Howell 1942-7-29 17414 Tulare Little Five Lakes Basin Comment
  CAS-BOT-BC254636  Poa cusickii subsp. epilis John Thomas Howell 1949-8-3 25981 Tulare Sky Blue Lake 3505 Comment
  CAS-BOT-BC255156  Poa cusickii subsp. epilis John Thomas Howell 1958-8-16 34528 Madera E Fork of Granite Creek 2621 Comment
  CAS-BOT-BC254246  Poa glauca subsp. rupicola John Thomas Howell 1947-8-11 23977 Inyo Inconsolable Range 3810 Comment
  CAS-BOT-BC255820  Poa keckii John Thomas Howell 1942-7-31 17488 Tulare Mt. Kaweah Comment
  UC1026388  Poa kelloggii John Thomas Howell 1954-4-24 29151 Humboldt Bull Creek Flat Comment
  CAS-BOT-BC246769  Poa leibergii John Thomas Howell 1946-7-26 22734 Inyo Mono Mesa 3657 Comment
  GH360756  Poa leibergii J. T. Howell 1942-8-2 17587 Unknown Little Five Lakes Basin Comment
  CAS-BOT-BC246826  Poa leptocoma John Thomas Howell 1943-7-17 18456 Nevada Signal Hill, West side of Donner Pass near Norden 2133 Comment
  CAS-BOT-BC255899  Poa nervosa John Thomas Howell 1943-7-18 18550 Nevada Castle Peak Comment
  RSA44071  Poa nervosa J. T. Howell 1947-8-15 24135 Inyo Fourth Lake, 10,800 ft., Big Pines Lakes. 3293 Comment
  CAS-BOT-BC247273  Poa palustris John Thomas Howell 1961-9-23 36852 Plumas Indian Valley 1082 Comment
  CAS-BOT-BC247329  Poa pratensis John Thomas Howell 1944-6-4 19545 Marin Inverness Ridge west of Inverness Comment
  CAS-BOT-BC255202  Poa pratensis John Thomas Howell 1969-8-26 45930 Tulare Monarch Creek Trail near Mineral King, Sierra Nevada 2895 Comment
  CAS-BOT-BC256046  Poa pratensis John Thomas Howell 1955-6-12 30330 j Trinity Weaverville Comment
  SD112905  Poa secunda Darley F. Howe 1947-6-1 1754 Unknown Greenhorn Mts. 1981 Comment
  SEINET12894114 Image available Poa secunda J. T. Howell 1934-1 12342 Unknown Comment
  CAS-BOT-BC247062  Poa secunda subsp. juncifolia John Thomas Howell; Gordon H. True 1970-7-14 5493 Sierra West side of Dog Valley ca. 5 miles northwest of Verdi (Nevada) 1889 Comment
  CAS-BOT-BC236034  Poa secunda subsp. secunda John Thomas Howell; Gordon H. True 1967-5-29 42271 Inyo 1/3 mile E of head of Nine Mile Canyon 1828 Comment
  CAS-BOT-BC243240  Poa secunda subsp. secunda John Thomas Howell; T. C. Fuller; G. D. Barbe 1980-4-29 53409 Siskiyou Fort Jones 853 Comment
  CAS-BOT-BC244501  Poa secunda subsp. secunda John Thomas Howell 1964-4-26 40437 Mariposa Just SE of Mariposa, on road to Morman Bar 594 Comment
  UCD91643  Poa secunda subsp. secunda John Thomas Howell 1942-7-29 17413 Tulare Little Five Lakes Basin. Comment
  UCD91653  Poa secunda subsp. secunda John Thomas Howell; Gordon H. True, Margaret Williams 1973-5-12 49196 Lassen Sierra Nevada. Elysian Valley northwest of Janesville. 1325 Comment
  CAS-BOT-BC244235  Poa unilateralis John Thomas Howell 1956-5-6 31350 San Francisco Sierra and Missouri Streets, San Francisco Comment
  UC703167  Poa wheeleri John Thomas Howell 1941-7-24 16418 Madera near Garnet Lake 2956 Comment
  UCD91591  Poa wheeleri John Thomas Howell 1944-8-3 19876 Mono Sonora Pass. 2926 Comment
  GH400773  Pogogyne abramsii J. T. Howell 1931-6-4 6636 Unknown 11 miles ne. of San Diego Comment
  SD113386  Polycarpon tetraphyllum Darley F. Howe 1956-5-19 2539 Los Angeles Lawn at University of California Los Angeles. Comment
  CAS-BOT-BC413923  Polygonum aviculare subsp. aviculare John Thomas Howell 1962-6-16 37564 Butte Magalia 731 Comment
  CAS-BOT-BC413963  Polygonum aviculare subsp. aviculare John Thomas Howell 1924-10-11 678 Alameda Euclid Avenue, Berkeley Comment
  CAS-BOT-BC414142  Polygonum aviculare subsp. aviculare John Thomas Howell; R. C. Barneby 1954-5-8 29200 Tulare Terra Bella 152 Comment
  CAS-BOT-BC414312  Polygonum aviculare subsp. neglectum J. T. Howell 1957-6-16 32667 San Francisco San Francisco. Third and Davidson streets Comment
  CAS-BOT-BC414334  Polygonum aviculare subsp. rurivagum John Thomas Howell 1963-6-22 39579 Monterey Priest Valley 685 Comment
  CAS-BOT-BC414554  Polygonum douglasii John Thomas Howell 1951-8-19 28193 Plumas Greenville 1097 Comment
  RSA22223  Polygonum douglasii subsp. johnstonii J. T. Howell 1938-8-7 14322 Mono Crooked Creek. 2058 Comment
Read comments
Jul 2 2012
  UC473577  Polygonum lapathifolium John Thomas Howell 1931-9-29 8125 San Francisco Mountain Lake San Francisco, Presidio (along highwater mark) Comment
  CAS-BOT-BC109220  Polygonum paronychia John Thomas Howell 1957-5-26 32450 San Francisco San Francisco. North base of Lone Mountain. Comment
  SDSU9658  Polygonum punctatum var. ellipticum D. F. Howe 1961-7-27 3068 Marin Bluff above ocean, 0.6 miles south of Stinson Beach. 91 Comment
  POM203797  Polygonum sawatchense J. T. Howell 1934-7-9 12528 Lassen Harvey Valley. Comment
  RSA304477  Polygonum sawatchense J. T. Howell 1942-8-8 17832 Tulare Farewell Gap Trail near Mineral King. Comment
  SDSU9667  Polygonum shastense D. F. Howe 1962-8-6 3409 Siskiyou Mt. Shasta, Shasta National Forest. 2438 Comment
  UC42892  Polypodium Marshall A. Howe 1892-3-26 Alameda Wildcat Canyon Berkeley Comment
  UC750597  Polypogon maritimus John Thomas Howell 1945-6-22 21218 Lake Sulphur Banks Comment
  CAS-BOT-BC237461  Polypogon viridis John Thomas Howell 1959-9-26 35069 Plumas Near Soda Spring, Feather River Canyon 682 Comment
  CAS-BOT-BC237523  Polypogon viridis J. T. Howell 1963-8-6 40035 Monterey Santa Lucia Mountains. Abbott Lakes, Arroyo Seco Forest Service Campground Comment
  SD112684  Polypogon viridis Darley F. Howe 1938-7-15 698 San Diego Rocky stream bed, Pine Hills region. Comment
  CAS-BOT-BC237558  Polypogon viridis John Thomas Howell 1957-6-11 32596 San Francisco San Francisco. E side of Lone Mountain Comment
  RSA11  Polystichum imbricans subsp. curtum J. T. Howell 1927-8-2 571 Riverside Road to Hemet, Mt. San Jacinto. 1372 Comment
  CAS-BOT-BC72359  Polystichum imbricans subsp. imbricans John Thomas Howell 1959-9-26 35041 Plumas Slaty Rocks near Keddie 1005 Comment
  CAS-BOT-BC102713  Populus tremuloides John Thomas Howell 1944-8-14 s.n. Tuolumne Glen Aulin Comment
  CAS-BOT-BC102953  Populus trichocarpa John Thomas Howell; T. C. Fuller; G. D. Barbe 1980-4-29 53413 Siskiyou Oro Fino 853 Comment
  CAS-BOT-BC102968  Populus trichocarpa John Thomas Howell 1960-8-22 36356 Shasta Manzanita Lake 1783 Comment
  CAS-BOT-BC105605  Populus trichocarpa John Thomas Howell 1960-8-20 36236 Tehama Morgan - near Lassen Volcanic National Park 1463 Comment
  CAS-BOT-BC233726  Portulaca John Thomas Howell 1961-9-24 36916 Plumas Feather River bed SW of Beckwourth, Sierra Nevada 1487 Comment
  CAS-BOT-BC267192  Potamogeton foliosus John Thomas Howell 1946-8-23 22893 Marin Pierce Point Road, Point Reyes Peninsula Comment
  SD112173 Image available Potamogeton foliosus subsp. foliosus Darley F. Howe 1957-6-23 2578 San Diego Pine Valley Creek Comment
  CAS-BOT-BC453706  Potamogeton illinoensis John Thomas Howell 1963-8-6 40024 Monterey Santa Lucia Mountains. Abbott Lakes, Arroyo Seco Forest Service Campground Comment
  CAS-BOT-BC141989  Potentilla bruceae John Thomas Howell; Gordon H. True 1970-8-12 6254 Nevada Webster Flat ca. 4 miles northeast of Cisco Grove on Rattlesnake Creek 2072 Comment
  CAS-BOT-BC142001  Potentilla bruceae John Thomas Howell 1949-8-5 26034 Tulare Army Pass 3505 Comment
  UC545660  Potentilla gracilis John Thomas Howell 1934-7-1 12306 Modoc Duncan Horse Camp Comment
  CAS-BOT-BC541052  Potentilla gracilis var. fastigiata John Thomas Howell; Gordon H. True 1967-7-5 43075 Tulare Kern Plateau, 6.4 miles north of Chimney Meadow 2225 Comment
  CAS-BOT-BC158548  Potentilla pseudosericea John Thomas Howell 1946-7-27 22799 Fresno Northwest of Mono Pass 3657 Comment
  CAS-BOT-BC158573  Potentilla pseudosericea John Thomas Howell 1944-8-10 20267 Mono Glacier Canyon, Mt. Dana Comment
  RSA44273  Potentilla pseudosericea J. T. Howell 1947-8-11 24023 Inyo South end of Coyote Ridge. 3659 Comment
  SD88463  Prosartes smithii Darley F. Howe 1972-7-2 Del Norte 5 miles south of Sanger Lake. 1646 Comment
  SD149134  Prunella vulgaris var. lanceolata John Thomas Howell, Gardon H. True and Margaret Williams 1973-6-28 49443 Lassen Elysian Valley, west of Janesville. 1326 Comment
  SD42635  Prunus emarginata Darley F. Howe 1947-6-25 San Bernardino Road Green Valley to hanna Flats Comment
  UCD113217  Prunus emarginata John Thomas Howell 1960-8-18 36044 Tehama Bluff Falls. 1981 Comment
  SDSU9167  Prunus fasciculata var. punctata D. F. Howe 1960-4-10 2848 San Luis Obispo East of san dunes and just south of Morro Bay. Comment
  SD45614  Prunus ilicifolia subsp. lyonii D. F. Howe 1953-5-2 Los Angeles Wain Canyon, Catalina Island Comment
  CAS-BOT-BC356974  Pseudognaphalium luteoalbum John Thomas Howell 1976-10-29 52275 El Dorado Bottom of Folsom Lake at Brown's Ravine boat landing 121 Comment
  CAS-BOT-BC361629  Pseudognaphalium stramineum John Thomas Howell; Gordon H. True 1967-9-18 43773 Tulare Recreation area, north end of Lamont Meadow, Kern Plateau 1706 Comment
  CAS-BOT-BC361686  Psilocarphus John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-24 54207 Plumas 2.5 miles northeast of Quincy Junction on road to Mt. Hough 1280 Comment
  SD113160  Psilocarphus brevissimus Darley F. Howe 1935-4-14 177 San Diego Telegraph Canyon Comment
  CAS-BOT-BC362001  Psilocarphus tenellus John Thomas Howell 1962-6-18 37761 Plumas Sierra Valley near Beckwourth 1487 Comment
  UC526155  Psoralidium lanceolatum John Thomas Howell 1934-6-10 11860 Lassen Doyle Comment
  JEPS41732  Psorothamnus emoryi John Thomas Howell 1927-11-25 3235 San Diego ne end Borrego Valley ne end Borrego Valley (sandy wash) Comment
  UC42931  Pteridium aquilinum var. pubescens Marshall A. Howe 1894-8-8 Siskiyou Shasta Soda Springs Comment
  CAS-BOT-BC460494  Pterospora andromedea John Thomas Howell 1940-7-28 15651 Fresno Bubbs Creek, near Sphinx Creek Comment
  SEINET196515 Image available Ptilagrostis kingii J. T. Howell 1949-7-21 25566 Tulare Rock Creek Sierra Nevada 3200 Comment
  UCD93428  Puccinellia nuttalliana John Thomas Howell 1964-10-24 40995 Mono Mono Lake near Lee Vining. 2072 Comment
  RSA43324  Purshia tridentata var. glandulosa J. T. Howell 1948-4-25 24246 Kern West side of Walker Pass. Comment
  SD81029  Pyrrocoma apargioides Darley F. Howe 1971-8-24 Inyo Trail to Lamarch Lake above North Lake, west of Bishop. 3050 Comment
  CAS-BOT-BC362281  Pyrrocoma lanceolata var. lanceolata John Thomas Howell 1938-8-8 14393 Mono Long Valley Comment
  RSA93970  Pyrrocoma racemosa J. T. Howell 1933-9-17 11688 Solano Montezuma Hills Comment
  CAS-BOT-BC362305  Pyrrocoma racemosa var. paniculata John Thomas Howell 1962-7-9 38347 Kern Isabella 762 Comment
  CAS-BOT-BC104202  Quercus X morehus John Thomas Howell 1939-10-29 s.n. Marin San Geronimo Ridge Comment
  CAS-BOT-BC104419  Quercus X subconvexa John Thomas Howell; John Tucker 1947-8-31 24175 Marin Ridgecrest Road N of Alpine Lake Comment
  SD129862  Quercus agrifolia var. agrifolia Melanie Howe 1988-3-21 6 San Diego Mission Trails Regional Park, Padre Dam Comment
  CAS-BOT-BC62665  Quercus chrysolepis John Thomas Howell 1960-6-8 35446 Fresno 2 mi. westerly from Sequoia Lake 1524 Comment
  CAS-BOT-BC62717  Quercus chrysolepis John Thomas Howell 1965-4-26 41159 Madera 3 miles south of Oakhurst 914 Comment
  CAS-BOT-BC93976  Quercus durata John Thomas Howell; R. C. Barneby 1954-5-13 29535 Nevada Grass Valley 731 Comment
  CAS-BOT-BC93983  Quercus durata John Thomas Howell 1951-6-26 27532 Plumas near Rich Bar 792 Comment
  SD113990  Quercus engelmannii Darley F. Howe 1945-11-22 1368 San Diego Lyons Valley Comment
  A344921  Quercus garryana J. T. Howell 1933-8-13 11494 Unknown 2 miles from Smith Creek on road to San Jose Comment
  UCD46166  Quercus garryana var. semota John Thomas Howell 1954-6-4 29917 Tuolumne Between Twain Harte and Stanislaus River bridge, Tuolumne County. Comment
  CAS-BOT-BC104747  Quercus wislizeni John Thomas Howell; Gordon H. True 1969-5-13 45639 Kern Sierra Nevada. Spanish Needle Creek road t o Lamont Meadow 1280 Comment
  CAS-BOT-BC104881  Quercus wislizeni John Thomas Howell 1927-8-22 3033 Marin on S side of Mt. Tamalpais above Mill Valley 152 Comment
  CAS-BOT-BC362529  Rafinesquia californica John Thomas Howell 1927-6-24 2581 San Bernardino Aliso Canon [Canyon], southern Puente Hills near the Santa Ana Canon [Canyon] 274 Comment
  CAS-BOT-BC362604  Rafinesquia neomexicana John Thomas Howell 1930-5-13 4923 Kern Red Rock Canyon Comment
  CAS-BOT-BC362781  Raillardella argentea John Thomas Howell 1949-8-8 26155 Tulare Above Sky Blue Lake 3657 Comment
  UC703158  Raillardella argentea John Thomas Howell 1942-8-7 17785 Tulare Lost Canyon 3048 Comment
  CAS-BOT-BC362880  Raillardella scaposa John Thomas Howell 1944-8-12 20339 Tuolumne Between Tioga Pass and Gaylor Lakes Comment
  CAS-BOT-BC379005  Ranunculus aquatilis var. diffusus John Thomas Howell 1946-5-4 21744 Marin 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-BC378918  Ranunculus californicus var. californicus John Thomas Howell 1925-3-23 877 Alameda Arroyo Mocho at NE base of Cedar Mt. Comment
  RSA305  Ranunculus cymbalaria var. saximontanus J. T. Howell 1927-7-19 3769 Orange Santa Ana River bottom, Rancho Santa Ana. 152 Comment
  SDSU10115  Ranunculus muricatus D. F. Howe 1948-5-21 1909 Placer 457 Comment
  SD113143  Raphanus sativus Darley F. Howe 1944-7-21 1242 San Diego Cultivated ground 1.0 mile north of Otay. Comment
  CAS-BOT-BC74285  Raphanus sativus John Thomas Howell 1966-4-18 41517 Marin Tiburon. Just north of John Thomas Howell Botanical Garden. Comment
  RSA512832  Rhamnus tomentella subsp. cuspidata J. T. Howell, G. H. True 1969-9-29 46323 Tulare Fay Creek SE of True Meadow, Kern Plateau 2073 Comment
  RSA518948  Rhamnus tomentella subsp. cuspidata J. T. Howell, G. H. True 1971-6-14 47682 Kern 3 mi. east of Glennville on Greenhorn Mountain rd. 1220 Comment
  SD51019  Rhus trilobata var. anisophylla Darley F. Howe 1960-4-28 2925 San Bernardino Kingston Range. 1370 Comment
  SD112956  Rhus trilobata var. pilosissima Darley F. Howe 1915-1 4 Los Angeles Claremont Comment
  NY51372  Rhynchospora californica J. T. Howell 1936-7-26 12679 Sonoma Pitkin Marsh, 5 mi N of Sebastopol. Comment
  CAS-BOT-BC111899  Rhynchospora capitellata John Thomas Howell 1945-7-18 21318 Sonoma Pitkin Marsh Comment
  POM303625  Rhynchospora globularis var. recognita J. T. Howell 1936-7-26 12678 Sonoma Pitkin Marsh, 5 miles north of Sebastopol. Comment
  CAS-BOT-BC111927  Rhynchospora recognita John Thomas Howell 1945-8-14 21393 Sonoma Perry Marsh Comment
  CAS-BOT-BC92403  Ribes aureum var. aureum John Thomas Howell; T. C. Fuller; G. D. Barbe 1980-4-29 53407 Siskiyou Fort Jones. 853 Comment
  A363954  Ribes binominatum J. T. Howell 1937-7-25 13458 Unknown Caribou Basin, Salmon-Trinity Alps 1981 Comment
  A363955  Ribes binominatum J. T. Howell 1943-8-7 19172 Unknown Plaskett Meadow 1828 Comment
  UC1042526  Ribes malvaceum John Thomas Howell 1954-11-3 30138 Monterey Arroyo Seco River Canyon Santa Lucia Mts. Comment
  RSA0021668  Ribes malvaceum J. T. Howell 1931-3-29 6027 San Benito Hernandez. Comment
  SD45588  Ribes nevadense D. F. Howe 1953-5-31 2294 Los Angeles Mt. Wilson 1493 Comment
  CAS-BOT-BC186182  Ribes roezlii var. roezlii John Thomas Howell 1931-2-23 5747 Mariposa 3 miles from Coulterville on road to Bower's Cave Comment
  CAS-BOT-BC199010  Ribes roezlii var. roezlii John Thomas Howell 1960-3-26 35200 Kern Near Delonegha Hot Springs, Sierra Nevada Comment
  SD88452  Ribes sanguineum var. glutinosum Darley F. Howe 1972-5-4 Monterey 6.0 miles north of Lucia on Highway 1. 60 Comment
  A380963  Ribes velutinum J. T. Howell 1934-6-12 12011 Unknown Between Davis Creek and Plum Valley Comment
  CAS-BOT-BC168749  Ribes victoris John Thomas Howell 1943-3-7 17885 Marin Hills northeast of San Rafael Comment
  CAS-BOT-BC362933  Rigiopappus leptocladus John Thomas Howell; T. C. Fuller; G. D. Barbe 1980-4-29 53423 Siskiyou East side of Scott Valley, 10 miles south of Fort Jones on road to Callahan 853 Comment
  CAS-BOT-BC362953  Rigiopappus leptocladus John Thomas Howell 1962-6-16 37594 Butte Feather River West Branch sw. of Nelson Bar 304 Comment
  CAS-BOT-BC362911  Rigiopappus leptocladus John Thomas Howell 1969-5-5 45575 Marin North of Ring Hill, Tiburon Peninsula Comment
  SD113923  Romneya trichocalyx Darley F. Howe 1936-5-17 352 San Diego Otay Valley near Otay Comment
  SD129868  Romneya trichocalyx Melanie Howe, L. Kelly 1988-7-22 34 San Diego Near entrance to Mission Trails Regional Park, Padre Dam Comment
  SD50941  Rorippa curvipes var. curvipes Darley F. Howe 1928-7-28 Mono 1.0 mile north of Crestview Camp. Comment
  CAS-BOT-BC74750  Rorippa curvisiliqua John Thomas Howell; Gordon H. True 1966-7-11 41734 Tulare Sierra Nevada. Horse Meadow, Kern Plateau. 2255 Comment
  CAS-BOT-BC74486  Rorippa curvisiliqua John Thomas Howell 1976-10-29 52280 El Dorado Sierra Nevada. Folsom Lake at Brown's Ravine boat landing. 121 Comment
  CAS-BOT-BC74543  Rorippa curvisiliqua John Thomas Howell 1946-6-16 22090 Marin Point Reyes Station. Comment
  SDSU1267  Rorippa curvisiliqua D. F. Howe 1963-5-19 3721 Monterey 3 miles north of San Luis Obispo-Monterey Co. line on #101. 183 Comment
  CAS-BOT-BC75024  Rorippa palustris var. hispida John Thomas Howell 1961-9-23 36849 Plumas Sierra Nevada. Indian Valley. 1082 Comment
  RSA126240  Rosa californica J. T. Howell 1939-9-3 15349 Marin San Antonio Creek Comment
  A345979  Rosa gymnocarpa J. T. Howell 1939-8-4 15036 Unknown Between Elk Mt. and Marble Rim, Marble Mts. Comment
  CAS-BOT-BC148107  Rosa gymnocarpa John Thomas Howell 1925-9-27 1485 Contra Costa San Leandro Canyon, Oakland Hills Comment
  CAS-BOT-BC148164  Rosa gymnocarpa John Thomas Howell 1976-7-15 51866 Plumas Snake Lake, about 4 miles northwest of Quincy - Sierra Nevada 1219 Comment
  CAS-BOT-BC146984  Rosa woodsii subsp. ultramontana John Thomas Howell 1928-6-20 4070 Inyo Jail [Canon] Canyon near the Burro Mine, Panamint Mts. 1066 Comment
  CAS-BOT-BC149751  Rosa woodsii subsp. ultramontana John Thomas Howell 1950-7-23 27247 Tulare Bakeoven Meadows, South Fork of Kern River 2468 Comment
  CAS-BOT-BC148400  Rubus leucodermis John Thomas Howell; Alice Eastwood 1938-7-7 6128 Mendocino Cummins P.O. Comment
  UC1177241  Rubus ulmifolius var. inermis John Thomas Howell 1943-9-5 19313 Marin between Tamalpais Valley and Tamalpais High School; between Tamalpais Valley and Tamalpais H.S. Comment
  CAS-BOT-BC156931  Rubus ursinus John Thomas Howell 1957-4-30 32139 San Benito The Pinnacles Comment
  CAS-BOT-BC157110  Rubus ursinus John Thomas Howell 1938-6-4 13888 San Mateo Burlingame Comment
  RSA220071  Rubus ursinus J. T. Howell 1957-5-28 32483 San Francisco West side of Lone Mountain. Comment
  UC1177247  Rubus ursinus John Thomas Howell 1943-4-11 17894 Marin Black Canyon San Rafael Hills, Black Canyon Comment
  CAS-BOT-BC433281  Rumex crispus John Thomas Howell 1973-7-25 49987 Merced 3 miles south of Gustine on Hunt Road to Ingomar 30 Comment
  CAS-BOT-BC433529  Rumex fueginus John Thomas Howell 1926-11-7 2241 San Francisco Lake Merced, San Francisco. Comment
  CAS-BOT-BC433667  Rumex obtusifolius John Thomas Howell 1940-9-15 s.n. Marin Stinson Beach Comment
  CAS-BOT-BC433751  Rumex pulcher John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-5-17 52881 Calaveras Foothills near Wallace 66 Comment
  CAS-BOT-BC433781  Rumex pulcher John Thomas Howell 1959-9-20 34622 Butte Eastern outskirts of Oroville 60 Comment
  CAS-BOT-BC433953  Rumex salicifolius John Thomas Howell 1963-5-18 39332 Monterey 2.5 miles south of Aromas 60 Comment
  CAS-BOT-BC433933  Rumex salicifolius John Thomas Howell 1947-7-6 23323 Marin Laurel Dell, Mt. Tamalpais Comment
  UC1176808  Rumex salicifolius var. crassus John Thomas Howell 1946-7-4 22173 Marin Dillons Beach Comment
  SDSU9730  Rumex salicifolius var. triangulivalvis D. F. Howe 1962-8-18 3466 Fresno 15.6 miles east of Shaver Lake on #168 Sierra National Forest. 2225 Comment
  CAS-BOT-BC434108  Rumex transitorius John Thomas Howell 1939-6-25 14793 Marin Summit Avenue, Mill Valley Comment
  CAS-BOT-BC434307  Rumex triangulivalvis John Thomas Howell 1960-7-22 35891 Plumas Lassen Volcanic National Park. Drakesbad 1828 Comment
  CAS-BOT-BC267078  Sagittaria John Thomas Howell 1954-9-6 30093 Calaveras 3 miles SE of Angels Camp Comment
  CAS-BOT-BC132686  Salix John Thomas Howell; Gordon H. True 1969-5-14 45746 Tulare Cherry Hill Road about 1.5 mile east of Kern River Canyon road, Brush Creek Canyon, Kern Plateau 1310 Comment
  CAS-BOT-BC132876  Salix arctica John Thomas Howell 1949-7-20 25537 Tulare Rock Creek 3444 Comment
  CAS-BOT-BC129635  Salix bonplandiana John Thomas Howell 1962-5-22 37317 Tulare South Creek near Dunwood - Sierra Nevada 1188 Comment
  CAS-BOT-BC102821  Salix boothii John Thomas Howell 1960-8-23 36449 Shasta Lassen Loop above Little Hot Springs Valley 2407 Comment
  RSA201371  Salix boothii J. T. Howell 1960-8-21 36319 Shasta Kings Creek Meadow. 2210 Comment
  A382493  Salix eastwoodiae J. T. Howell 1940-8-4 15961 Unknown East Lake 2926 Comment
  CAS-BOT-BC103508  Salix eastwoodiae John Thomas Howell 1948-7-24 24967 Fresno Bullfrog Lake 3240 Comment
  RSA505991  Salix eastwoodiae J. T. Howell 1966-6-21 41578 Inyo Onion Valley. 2805 Comment
  SD114305  Salix exigua var. hindsiana Darley F. Howe 1947-4-13 1599 San Diego One mile west of Bonita, in stream bed of Sweetwater Valley. Comment
  RSA137  Salix gooddingii J. T. Howell 1927-7-24 394 Orange Santa Ana River bottom near Rancho Santa Ana. 152 Comment
  CAS-BOT-BC106795  Salix hindsiana John Thomas Howell 1929-4-7 4125 Merced Merced River bottom at the Hopeton Bridge 60 Comment
  CAS-BOT-BC106801  Salix hindsiana John Thomas Howell 1926-6-13 2029 Stanislaus Knight's Ferry 76 Comment
  CAS-BOT-BC125306  Salix lasiandra var. lasiandra John Thomas Howell 1960-7-18 35593 Plumas Drakesbad 1828 Comment
  CAS-BOT-BC125415  Salix lasiandra var. lasiandra John Thomas Howell 1960-8-22 36374 Shasta Anklin Meadows 1889 Comment
  CAS-BOT-BC107374  Salix lasiolepis var. lasiolepis John Thomas Howell 1969-4-22 45535 Amador Volcano 609 Comment
  CAS-BOT-BC124342  Salix lasiolepis var. lasiolepis John Thomas Howell 1980-9-8 53898 Marin Between Alpine and Bon Tempe lakes Comment
  CAS-BOT-BC128251  Salix lasiolepis var. lasiolepis John Thomas Howell 1958-5-22 33192 Tulare Johnsondale 1423 Comment
  CAS-BOT-BC128260  Salix lasiolepis var. lasiolepis John Thomas Howell; Gordon H. True 1967-8-9 43685 Tulare Pinyon woodland about 4 miles north of Chimney Meadow - Kern Plateau, Sierra Nevada 2103 Comment
  CAS-BOT-BC128277  Salix lasiolepis var. lasiolepis John Thomas Howell 1955-6-12 30323 Trinity Weaverville 609 Comment
  CAS-BOT-BC124794  Salix lemmonii John Thomas Howell 1961-6-21 36607 Plumas Greenville 1097 Comment
  SDSU9452  Salix lemmonii D. F. Howe 1948-8-9 1882 San Bernardino Dollar Lake, San Bernardino Mtns. 2896 Comment
  UC846412  Salix lemmonii John Thomas Howell 1938-8-10 14486 Mono Minaret Summit Comment
  RSA503330  Salix lucida subsp. lasiandra J. T. Howell 1963-8-20 40192 Inyo Whitney Portal. 2439 Comment
  CAS-BOT-BC129482  Salix melanopsis John Thomas Howell 1954-6-4 29914 Stanislaus Knights Ferry Comment
  CAS-BOT-BC125762  Salix orestera John Thomas Howell 1941-8-6 16782 A Madera Headwaters of Shadow Creek se. of Mt. Ritter Comment
  CAS-BOT-BC125800  Salix orestera John Thomas Howell 1944-8-16 20640 Mono Mono Pass Comment
  CAS-BOT-BC125814  Salix orestera John Thomas Howell 1944-8-16 20640 Mono Mono Pass Comment
  CAS-BOT-BC129372  Salix orestera John Thomas Howell 1947-8-8 23926 Inyo Second to Third Lake, Big Pine Lakes 3048 Comment
  CAS-BOT-BC129097  Salix scouleriana John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-26 54362 Plumas 0.75 miles northeast of Bucks Summit on road to Quincy - Sierra Nevada 1600 Comment
  SDSU9441  Salix sitchensis D. F. Howe 1972-2-16 4799 Monterey 4 miles south fo Point Sur. Comment
  CAS-BOT-BC180785  Salsola paulsenii John Thomas Howell; Gordon H. True 1967-9-17 43739 Kern Ridgecrest Comment
  CAS-BOT-BC175737  Salsola tragus John Thomas Howell; Gordon H. True 1967-9-21 43992 Tulare About 4 1/2 miles east-northeast of Pixley. Along west fence & Road 160 83 Comment
  RSA269  Salsola tragus J. T. Howell 1927-6-6 44 Orange Santa Ana River bottom, Rancho Santa Ana 152 Comment
  CAS-BOT-BC180706  Salsola tragus John Thomas Howell 1952-10-26 28876 Los Angeles Vacant lot, Palmdale Comment
  SD114226  Saltugilia splendens Darley F. Howe 1941-6-9 1105 Riverside Strawberry Creek, San Jacinto Mts. Comment
  CAS-BOT-BC238676  Sambucus nigra subsp. caerulea John Thomas Howell 1950-7-26 27363 Inyo Summit Creek, east of Olancha Pass 2773 Comment
  CAS-BOT-BC238886  Sambucus nigra subsp. caerulea John Thomas Howell 1939-8-5 15072 Siskiyou Spirit Lake, Marble Mts. 1828 Comment
  SD112134  Samolus parviflorus Darley F. Howe 1939-7-9 934 San Diego Stream bed near Barrett. Comment
  RSA126183  Sanguisorba minor J. T. Howell 1949-6-7 25341 Marin Aurora School, NW Marin. Comment
  POM194215  Sanicula laciniata J. T. Howell 1927-3-20 2290 Marin Cote Madera Ridge 305 Comment
  GH363164  Sarcodes sanguinea T. J. Howell 1889-6-16 192 Unknown Siskiyou Mts. Comment
  POM304565  Saxifraga nidifica John T. Howell 1942-7-25 17173 Tulare Eagle Lake trail near Mineral King. Comment
  CAS-BOT-BC283111  Schedonorus arundinaceus John Thomas Howell 1943-7-26 18862 Nevada West side of Donner Pass near Norden 2133 Comment
  UCD65649  Schedonorus arundinaceus John Thomas Howell; Gordon H. True and Margaret Williams 1973-6-28 49474 Lassen Sierra Nevada. Elysian Valley west of Janesville. 1325 Comment
  CAS-BOT-BC283629  Schedonorus pratensis John Thomas Howell 1951-8-20 28213 Plumas Genesee 1127 Comment
  CAS-BOT-BC283636  Schedonorus pratensis John Thomas Howell 1957-6-12 32615 San Francisco Lone Mountain Comment
  SD112699  Schismus barbatus Darley F. Howe 1960-3-2 2827 San Diego Mt. Springs Grade, 2.3 miles above 2000 ft. marker. Comment
  SEINET10597124  Schismus barbatus John Thomas Howell 1948-4-26 Howell 24272 Kern Sandy roadside, Tehachapi Pass, road East of Edison, Ca. Comment
  CAS-BOT-BC111243  Schoenoplectus californicus John Thomas Howell 1939-10-1 15368 Marin Phoenix Lake Comment
  CAS-BOT-BC111247  Schoenoplectus californicus John Thomas Howell 1939-10-1 15368 Marin Phoenix Lake Comment
  CAS-BOT-BC111743  Schoenoplectus pungens var. badius John Thomas Howell 1956-8-26 31800 San Francisco Edge of Pine Lake Comment
  CAS-BOT-BC111218  Scirpus John Thomas Howell 1977-8-2 52484 Alpine Mosquito Lake on Ebbetts Pass Road, Canadian Zone. 2438 Comment
  CAS-BOT-BC35588  Scirpus congdonii John Thomas Howell 1962-6-17 37650 Plumas Butterfly Valley 1036 Comment
  CAS-BOT-BC111032  Scirpus microcarpus John Thomas Howell 1927-7-10 2761 San Bernardino Wet meadow on Mill Creek Road near Municipal Camp of Riverside 2225 Comment
  CAS-BOT-BC111129  Scirpus microcarpus John Thomas Howell; Gordon H. True 1970-6-25 46778 Tulare East branch of Salmon Creek, Big Meadow to Sirretta Meadows. 2590 Comment
  CAS-BOT-BC240006  Scribneria bolanderi John Thomas Howell 1945-4-29 20791 Marin West of Camp Handy, Mt. Tamalpais Comment
  CAS-BOT-BC240035  Scribneria bolanderi John Thomas Howell 1948-4-18 24209 Sonoma Hills east of Agua Caliente Comment
  CAS-BOT-BC238463  Scrophularia John Thomas Howell 1977-8-11 52684 Plumas Canyon of Little Last Chance Creek between Chilcoot and Frenchmans Reservoir 1676 Comment
  CAS-BOT-BC179226  Scutellaria nana John Thomas Howell 1934-6-30 12257 Modoc Duncan Horse Camp. 1355 Comment
  CAS-BOT-BC61495  Sedum album John Thomas Howell 1957-8-6 s.n. San Francisco Strybing Arboretum, Golden Gate Park Comment
  CAS-BOT-BC61498  Sedum lanceolatum John Thomas Howell 1977-8-3 52558 Alpine Just north of Ebbetts Pass 2682 Comment
  SD41243  Sedum niveum Darley F. Howe 1946-8-3 San Bernardino Sugarloaf trail from Rathbone Creek. 2895 Comment
  CAS-BOT-BC64193  Sedum obtusatum John Thomas Howell 1958-8-12 34352 Madera Near Isberg Lake. 2987 Comment
  SD56781  Sedum radiatum subsp. radiatum Darley F. Howe 1963-7-13 Fresno Stevenson Creek, Sierra National Forest. 1220 Comment
  CAS-BOT-BC418479  Sedum sediforme J. T. Howell; T. C. Fuller; G. D. Barbe 1980-7-14 2837 Tulare Abandoned building site, mouth of Packsaddle Canyon at fish hatchery dam on Kern River, 1.6 km north of Roads End. 1100 Comment
  SD69974  Sedum stenopetalum subsp. radiatum Darley F. Howe 1968-5-23 Mendocino Cliff, 3.0 miles west of Mendocino-Lake County line on road from Hopland to Clear Lake. Comment
  CAS-BOT-BC61963  Selaginella John Thomas Howell 1927-7-24 2834 Orange side of Calymine Canyon, n. Santa Ana Mts. 152 Comment
  RSA16  Selaginella bigelovii John Thomas Howell 1927-7-28 506 Orange Nolina Canyon, Rancho Santa Ana 152 Comment
  CAS-BOT-BC69749  Selaginella wallacei John Thomas Howell 1926-9-26 2193 Marin Near head of Muir Woods. Comment
  CAS-BOT-BC363308  Senecio aronicoides John Thomas Howell 1943-8-3 18966 Glenn Plaskett Meadows 1828 Comment
  SD88427  Senecio californicus var. californicus Darley F. Howe 1972-4-21 Santa Barbara near entrance to Vandenburg Air Base on Floradane Avenue north of Lompoc Comment
  CAS-BOT-BC329138  Senecio flaccidus var. douglasii John Thomas Howell 1973-10-31 50275 Tulare Near Potwisha, Middle Fork of Kaweah River 609 Comment
  CAS-BOT-BC329141  Senecio flaccidus var. douglasii John Thomas Howell; Gordon H. True 1967-8-8 43503 Tulare Lamont Meadow, Kern Plateau 1676 Comment
  SD81215  Senecio flaccidus var. douglasii Darley F. Howe 1971-10-5 Kern Near Lebec. Comment
  SD103803  Senecio integerrimus var. exaltatus Darley Howe 1978-6-22 Inyo Near Cardinal Village, Bishop Creek. 2620 Comment
  SD112504  Senecio integerrimus var. major Darley F. Howe 1977-6-29 4980 Trinity Weaver Bally Road 1735 Comment
  CAS-BOT-BC333032  Senecio scorzonella John Thomas Howell 1946-7-14 22235 Inyo Mosquito Flat, Rock Creek Lake Basin 3139 Comment
  CAS-BOT-BC364186  Senecio serra John Thomas Howell 1942-7-26 17248 Tulare Mineral King Comment
  UCD135753  Senecio sylvaticus John Thomas Howell 1942-4-19 s.n. Marin Carson Ridge. Comment
  CAS-BOT-BC364493  Senecio triangularis John Thomas Howell; Gordon H. True 1970-6-23 46628 Tulare NE end of Big Meadow, Kern Plateau 2377 Comment
  CAS-BOT-BC240229  Setaria viridis John Thomas Howell; Gordon H. True 1967-9-19 43902 Tulare Kennedy Meadows Campground, South Fork of Kern River, Kern Plateau 1859 Comment
  PGM1191  Setaria viridis J. T. Howell 1973-11-4 Monterey Salinas Valley, King City, in cultivated area (weedy) Comment
  SD44647  Sidalcea hartwegii Darley F. Howe 1951-5-2 2107 Placer 4.0 miles north of Auburn. 456 Comment
  GH420742  Sidalcea hickmanii subsp. viridis J. T. Howell 1942-6-21 16997 Unknown Carson Ridge Comment
  RSA127567  Sidalcea hickmanii subsp. viridis J. T. Howell 1954-6-23 s.n. Marin Carson Ridge Comment
  SD113825  Sidalcea hirsuta Darley F. Howe 1962-5-13 3223 Tulare Sequoia National Forest, 5.1 miles east of entrance on #190. Comment
  CAS-BOT-BC213161  Sidalcea oregana subsp. hydrophila John Thomas Howell 1943-8-3 18997 Glenn Plaskett Meadows 1828 Comment
  SDSU8185  Sidalcea oregana subsp. hydrophila D. F. Howe 1965-8-4 4099 Lake 19 miles north of middletown of state #29. 610 Comment
  CAS-BOT-BC179065  Sidalcea oregana subsp. oregana John Thomas Howell 1934-6-12 11999 Modoc 6 mi. S of Davis Creek. Comment
  CAS-BOT-BC384314  Silene bernardina John Thomas Howell 1941-7-31 16542 Madera Agnew Pass Trail Comment
  SEINET196489  Silene bernardina John Thomas Howell 1949-7-17 Inyo Wonoga Peak Sierra Nevada. 2743 Comment
  CAS-BOT-BC384574  Silene coniflora John Thomas Howell 1946-5-30 21963 Marin Little Carson Canyon Comment
  SD147601  Silene douglasii John Thomas Howell, Gordon H. True 1970-7-14 5523 Sierra At Verdi Peak Lookout, Verdi Range. 2560 Comment
  CAS-BOT-BC389255  Silene lemmonii John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-6-26 53049 Calaveras Near Dorrington 1524 Comment
  CAS-BOT-BC389322  Silene lemmonii John Thomas Howell 1976-5-17 51688 Kern Near headwaters of Lumreau Creek, about 3 miles south-east of Glennville, on Farnsworth Ranch. Greenhorn Mountains 1402 Comment
  CAS-BOT-BC389344  Silene lemmonii John Thomas Howell 1923-6-23 81 Mariposa Near Stella Lake, Wawona 1219 Comment
  CAS-BOT-BC389785  Silene sargentii John Thomas Howell 1947-8-14 24112 Inyo Inconsolable Range above Thunder & Lightning Lake 3657 Comment
  CAS-BOT-BC389809  Silene sargentii John Thomas Howell 1941-7-24 16433 Madera Near Garnet Lake 2956 Comment
  CAS-BOT-BC74967  Sinapis arvensis John Thomas Howell; Gordon H. True 1968-6-10 44539 Plumas Sierra Nevada. Quincy. 1036 Comment
  CAS-BOT-BC175951  Solanum aviculare John Thomas Howell 1957-6-27 32778 Marin On roadside Steep Ravine, Mt. Tamalpais Comment
  CAS-BOT-BC156841  Solanum umbelliferum J. T. Howell 1943-7-25 18806 Placer West side of Donner Pass near Norden 2134 Comment
  CAS-BOT-BC157417  Solanum umbelliferum J. T. Howell 1930-3-28 4588 San Benito The Pinnacles Comment
  CAS-BOT-BC157473  Solanum umbelliferum J. T. Howell 1963-6-23 39633 Monterey On Peachtree Road along San Lorenzo Creek southeast of Lonoak Comment
  CAS-BOT-BC154707  Solanum umbelliferum J. T. Howell 1954-5-19 29911 Mariposa Mt. Bullion 640 Comment
  CAS-BOT-BC157249  Solanum umbelliferum J. T. Howell 1931-3-22 5951 Monterey Stone Canyon 8 miles east of Salinas Valley Comment
  RSA215966  Solidago californica J. T. Howell 1956-7-22 31720 San Francisco Summit ridge of Bayview Hills Comment
  SD37163  Solidago corymbosa Darley F. Howe 1941-8-8 1261 Inyo Lone Pine Creek 3140 Comment
  CAS-BOT-BC365588  Solidago elongata John Thomas Howell 1945-8-14 21401 Sonoma Perry Marsh Comment
  UC1177262  Solidago elongata John Thomas Howell 1945-8-19 21426 Marin near Ledum Swamp (Point Reyes Peninsula); Point Reyes Peninsula Comment
  SD51225  Solidago velutina subsp. californica Darley F. Howe 1960-9-20 2984 Plumas North fork of Feather River, 41 miles from Oroville. 609 Comment
  SD112524  Solidago velutina subsp. californica Darley F. Howe 1977-10-10 5009 Marin 3 miles north of Tamales. Comment
  CAS-BOT-BC374574  Sonchus oleraceus John Thomas Howell 1960-8-20 36243 Tehama Near Lassen Volcanic National Park. Morgan 1463 Comment
  SD113009 Image available Sonchus tenerrimus Darley F. Howe 1977-5-6 4937 San Diego Near corner of Melrose Drive and Melrose Way, Vista. Comment
  UCD92789  Sorghum bicolor John Thomas Howell 1967-11-3 44045 Tulare About 4.5 miles ENE of Pixley, Valley Grassland. 83 Comment
  CAS-BOT-BC235332  Sorghum halepense John Thomas Howell 1939-9-3 15344 Marin San Antonio Creek Comment
  CAS-BOT-BC236613  Spartina foliosa John Thomas Howell 1939-9-3 15331 Marin Corte Madera salt marsh Comment
  SEINET10893852  Spartina gracilis John Thomas Howell 1938-8-8 Howell 14390 Mono Long Valley. Comment
  CAS-BOT-BC390058  Spergularia John Thomas Howell 1987-10-15 s.n. Napa Vineyard of Eugene and Cody Gillette Kirkham, Silverado Trail North, St. Helena Comment
  CAS-BOT-BC390070  Spergularia atrosperma John Thomas Howell 1929-4-11 4145 Merced 7 1/2 miles sw. of Merced on Los Banos Road, San Joaquin Valley 45 Comment
  NY342700  Spergularia atrosperma J. T. Howell 1938-5-28 13826 Merced Los Banos Hills Comment
  POM248704  Spergularia macrotheca var. longistyla J. T. Howell 1938-4-10 13739 Alameda Eastern Livermore Valley. Comment
  SD112876 Image available Spergularia macrotheca var. macrotheca Darley F. Howe 1941-4-13 1074 San Diego Saline flat, Silver Strand. Comment
  CAS-BOT-BC390754  Spergularia marina John Thomas Howell 1938-4-10 13742 Alameda Eastern Livermore Valley Comment
  UCD99243  Spergularia marina John Thomas Howell 1972-6-25 48903 Solano on Carquinez Strait, western part of Benecia. Comment
  CAS-BOT-BC390622  Spergularia rubra John Thomas Howell 1940-5-20 s.n. Marin Pt. Reyes Lighthouse Comment
  RSA126199  Spergularia salina J. T. Howell 1944-6-25 19649 Marin Santa Venetia. Comment
  CAS-BOT-BC390995  Spergularia villosa John Thomas Howell 1953-5-24 29018 Tuolumne Near Montezuma on road to Chinese Camp 381 Comment
  CAS-BOT-BC213205  Sphaeralcea John Thomas Howell 1958-5-28 33532 Inyo Bishop Creek, Sierra Nevada 1950 Comment
  SD50728  Sphaeralcea ambigua var. ambigua Darley F. Howe 1959-8-14 2699 Inyo 17.5 miles east of Furnace Creek Inn. 914 Comment
  CAS-BOT-BC374765  Sphaeromeria potentilloides var. potentilloides John Thomas Howell 1962-6-19 37878 Plumas Chilcoot 1524 Comment
  SD98959  Spiraea densiflora D. F. Howe 1977-7-1 Siskiyou Mountain Creek on Scott River Road 1463 Comment
  SD88345  Stachys emersonii Darley F. Howe 1972-7-6 Siskiyou 1.3 miles south of Oregon state line on road to Happy Camp. 1646 Comment
  SD61050  Stachys rigida var. rigida Darley F. Howe 1964-8-7 3943 Humboldt 8.2 miles from Highway 96 on Mill Creek Road. Hoopa Valley. 1067 Comment
  GH379865  Stanfordia californica J. T. Howell 1931-3-18 5821 Unknown Jacalitos Canyon, w. Fresno Co. Comment
  RSA165489  Stanleya elata D. F. Howe 1961-6-18 s.n. Inyo 6.3 miles from Westgard Pass on road to Big Pine, White Mts 1524 Comment
  CAS-BOT-BC374835  Stebbinsoseris heterocarpa John Thomas Howell 1963-5-6 39100 Monterey Santa Lucia Mountains. 4 miles south of King City on road to Jolon 121 Comment
  RSA95418  Stellaria longipes J. T. Howell 1951-6-27 27587 Plumas McRae Meadow. 1982 Comment
  CAS-BOT-BC393725  Stellaria media John Thomas Howell 1964-4-28 40568 Mariposa Granitic country just south of Morman Bar on road to Ben Hur 548 Comment
  CAS-BOT-BC398265  Stellaria umbellata John Thomas Howell 1949-8-10 26207 Tulare Upper Soldier Lake 3413 Comment
  CAS-BOT-BC375088  Stephanomeria John Thomas Howell 1927-11-26 3241 San Diego Central Borrego Valley, w. Colorado Desert 182 Comment
  CAS-BOT-BC375234  Stephanomeria elata John Thomas Howell 1947-7-15 23353 Monterey San Simeon Highway at Castro Canyon Comment
  CAS-BOT-BC375345  Stephanomeria exigua subsp. coronaria John Thomas Howell 1970-11-8 47508 Kern Slope 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-BC375712  Stephanomeria runcinata John Thomas Howell 1957-6-23 32707 Kern Edison Comment
  CAS-BOT-BC375772  Stephanomeria virgata John Thomas Howell 1958-7-27 34018 Fresno Tehipite Valley, Middle Fork of the Kings River 1280 Comment
  CAS-BOT-BC375824  Stephanomeria virgata John Thomas Howell 1946-9-22 23029 Marin Bald Mt. Comment
  SEINET4413877 Image available Streptanthus albidus J. T. Howell 1937-1 13097 Unknown Comment
  CAS-BOT-BC61350  Streptanthus cordatus var. piutensis John Thomas Howell; Gordon H. True 1971-6-17 48039 Kern Sierra Nevada. 1 mile east of Bodfish Gap. 1310 Comment
  SD147613  Streptanthus cordatus var. piutensis John Thomas Howell, Gordon H. True 1971-6-17 48039 Kern Sierra Nevada; 1.0 mile east of Bodfish Gap. 1310 Comment
  GH422079  Streptanthus fenestratus J. T. Howell 1960-6-6 35335 Unknown Copper Creek Trail, Kings River Canyon 1676 Comment
  CAS-BOT-BC87256  Streptanthus glandulosus subsp. pulchellus John Thomas Howell 1940-5-12 15425 Marin Between Little Carson and Carson Ridge. Comment
  CAS-BOT-BC87279  Streptanthus glandulosus subsp. secundus John Thomas Howell 1944-5-21 19488 Marin Mount Tamalpais. South side of Phoenix Lake. Comment
  CAS-BOT-BC87433  Streptanthus polygaloides John Thomas Howell; Gordon H. True 1967-6-11 42559 Butte Sierra Nevada. Northeast side of Feather River Canyon near Pulga Bridge. 417 Comment
  CAS-BOT-BC87521  Streptanthus tortuosus John Thomas Howell 1963-7-12 39845 El Dorado Sierra Nevada. Meyers. 1935 Comment
  CAS-BOT-BC87890  Streptanthus tortuosus John Thomas Howell 1937-7-31 13705 Trinity 11 miles west of Big Bar. Comment
  CAS-BOT-BC87913  Streptanthus tortuosus John Thomas Howell 1972-4-24 48689 Mariposa Sierra Nevada. 3 miles from Briceburg on road to El Portal in Merced River Canyon. 396 Comment
  GH422374  Streptanthus tortuosus J. T. Howell 1958-7-23 33821 Unknown Simpson Meadow, Middle Fork of the Kings River 1828 Comment
  JEPS54007  Streptanthus tortuosus John T. Howell 1925-7-1 1292 El Dorado on hwy above and nw Emerald Bay; Lake Tahoe 1950 Comment
  CAS-BOT-BC110452  Suaeda taxifolia John Thomas Howell 1931-4-11 6268 Santa Barbara Valley Anchorage. Santa Cruz Island. Comment
  CAS-BOT-BC237045  Symphoricarpos mollis John Thomas Howell 1957-7-28 32824 San Francisco Bayview Hills, San Francisco Comment
  CAS-BOT-BC237111  Symphoricarpos mollis John Thomas Howell 1969-8-29 46061 Tulare Mineral King, Sierra Nevada 2377 Comment
  CAS-BOT-BC97558  Symphyotrichum ascendens John Thomas Howell 1961-9-22 36814 A Plumas Greenville 1088 Comment
  JEPS58961  Symphyotrichum ascendens J. Thomas Howell 1959-9-24 34973 Plumas Beckwourth Sierra Nevada 1487 Comment
  CAS-BOT-BC99016  Symphyotrichum eatonii John Thomas Howell 1963-8-22 40296 Alpine Sierra Nevada - Woodfords 1716 Comment
  CAS-BOT-BC98555  Symphyotrichum lentum John Thomas Howell 1933-9-17 11679 Solano Just east of Suisun on road to Rio Vista Comment
  UCD86175  Taeniatherum caput-medusae John Thomas Howell 1962-6-15 37484 Butte Magalia. 731 Comment
  CAS-BOT-BC328908  Taraxacum californicum John Thomas Howell 1947-7-23 23530 San Bernardino South Fork, Santa Ana River, San Bernardino Mountains 2590 Comment
  SD67300  Taraxia ovata Darley F. Howe 1967-4-10 San Luis Obispo 1.9 miles north of Cambria. Comment
  CAS-BOT-BC85204  Taxus brevifolia John Thomas Howell; Gordon H. True 1970-5-27 46526 El Dorado Sierra Nevada - Blodgett Experimental Forest 1280 Comment
  SD113869  Tetracoccus dioicus Darley F. Howe 1953-4-12 2262 San Diego One Palm Canyon, on the road from Santa Margarita River ford to De Luz Comment
  SDSU570  Tetradymia axillaris var. longispina D. F. Howe 1948-5-3 1803 Los Angeles 1.5 miles south of Lancaster. Comment
  UC990948  Tetradymia axillaris var. longispina D. F. Howe 1948-5-3 Los Angeles 1.5 mi s Lancaster 792 Comment
  CAS-BOT-BC329015  Tetradymia canescens John Thomas Howell 1963-8-20 40186 Inyo Whitney Portal 2438 Comment
  CAS-BOT-BC340062  Tetradymia comosa John Thomas Howell 1927-8-7 2962 San Diego SE. of Dulzura Ranch on road to Campo 335 Comment
  CAS-BOT-BC399728  Thalictrum fendleri John Thomas Howell 1924-6-20 426 Mariposa Near Merced River, Wawona 1219 Comment
  CAS-BOT-BC399783  Thalictrum polycarpum John Thomas Howell 1945-6-19 21079 Lake Sawmill Flat, Bartlett Mountain 1219 Comment
  CAS-BOT-BC399920  Thalictrum sparsiflorum John Thomas Howell 1946-7-14 22279 Inyo Mosquito Flat, Rock Creek Lake Basin 3139 Comment
  CAS-BOT-BC399960  Thalictrum sparsiflorum John Thomas Howell 1940-7-30 15700 Tulare East Lake 2926 Comment
  SD29581  Thalictrum sparsiflorum Darley F. Howe none given 1154 Inyo Lone Pine Creek Comment
  CAS-BOT-BC88050  Thelypodium crispum John Thomas Howell 1955-7-19 30797 Plumas Sierra Nevada. Vinton. 1505 Comment
  CAS-BOT-BC88121  Thelypodium laciniatum John Thomas Howell 1958-5-28 33576 Inyo Sierra Nevada. Bishop Creek. 1554 Comment
  CAS-BOT-BC88127  Thelypodium laciniatum John Thomas Howell 1938-8-7 14339 Mono Crooked Creek. 2057 Comment
  RSA299169B  Thinopyrum intermedium J. T. Howell, Gordon H. True 1969-8-7 43426 Tulare about 2 miles, northwest of Beach meadow; Kern Plateau 2500 Comment
  CAS-BOT-BC197368  Thinopyrum intermedium subsp. barbulatum John Thomas Howell 1974-7-10 50520 Lassen At the cemetery along road, Janesville 1295 Comment
  CAS-BOT-BC197417  Thinopyrum intermedium subsp. intermedium John Thomas Howell; Gordon H. True 1967-8-7 43427 Tulare About 2 miles northwest of Beach Meadow, Kern Plateau 2499 Comment
  CAS-BOT-BC88236  Thysanocarpus curvipes John Thomas Howell; Gordon H. True; Barbara T. Menzies; Roberta Shockey 1978-4-5 52761 Calaveras Sierra Nevada. Camp Nine Road northeast of Vallecito. 609 Comment
  CAS-BOT-BC88252  Thysanocarpus curvipes John Thomas Howell 1933-5-14 11274 Contra Costa Hills east of Saint Mary's College. Comment
  CAS-BOT-BC88412  Thysanocarpus curvipes John Thomas Howell 1945-6-21 21149 Lake Bartlett Mountain. Sawmill Flat to Ruppert Ridge. Comment
  CAS-BOT-BC66788  Thysanocarpus curvipes John Thomas Howell 1927-4-5 2300 Shasta Near Frazier Corners, 10 miles northeast of Redding. Comment
  CAS-BOT-BC66874  Thysanocarpus curvipes John Thomas Howell; Gordon H. True 1968-5-13 44252 Tulare Sierra Nevada. Kern Plateau. North Meadow Creek. 1981 Comment
  CAS-BOT-BC88458  Thysanocarpus curvipes John Thomas Howell 1928-5-4 3767 Los Angeles San Gabriel Mountains. Morrovia Canyon above the dam. Comment
  RSA0041665  Thysanocarpus curvipes var. elegans John Thomas Howell 1947-4-27 23106 Marin Bald Mt. west of San Anselmo. Comment
  CAS-BOT-BC67225  Thysanocarpus laciniatus John Thomas Howell; Gordon H. True 1967-5-30 42481 Tulare Sierra Nevada. Kern Plateau. About midway between Lamont Meadow and Long Valley. 1554 Comment
  RSA223366  Thysanocarpus laciniatus J. T. Howell 1931-4-10 6199 Santa Barbara Santa Cruz Island. Valle del Medio. Comment
  CAS-BOT-BC67228  Thysanocarpus laciniatus John Thomas Howell; Gordon H. True 1969-5-14 45736 Tulare Sierra Nevada. Kern Plateau. Marble ridge just north of Cherry Hill Road at start of Rincon Trail, Brush Creek Canyon. 1463 Comment
  CAS-BOT-BC447596  Tiarella trifoliata subsp. unifoliata John Thomas Howell 1930-7-27 5394 Sonoma Deep shade of redwood forest, 1 mile north of Fort Ross Comment
  RSA378167  Tofieldia glutinosa subsp. occidentalis J. T. Howell 1948-7-22 24909 Fresno Bubbs Creek Canyon in vicinity of Vidette Meadows. 2896 Comment
  SD88344  Tolmiea menziesii Darley F. Howe 1972-7-6 Siskiyou 1.3 miles south of Oregon State line, on road to Happy Camp 1646 Comment
  UC905053  Torreya californica John Thomas Howell 1948-5-16 24304 Marin near top of Eldridge Grade Mt. Tamalpais, Eldridge Grade Comment
  UCD93295  Torreyochloa erecta John Thomas Howell 1962-9-23 38820 Kern Sierra Nevada. Greenhorn Mountains. North of Tiger Flat. Transition Zone Forest. 2133 Comment
  SEINET196519 Image available Torreyochloa pallida var. pauciflora J. T. Howell 1945-9-25 21506 Tuolumne Second lake east of Young Lake 3078 Comment
  SD112799  Toxicoscordion brevibracteatum Darley F. Howe 1962-4-19 3211 Kern On #14, 11.5 miles south of junction with #395. 1006 Comment
  CAS-BOT-BC377082  Tragopogon dubius John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-8-12 54548 Mono Crowley Lake Drive (old Highway 395) at Hilton Creek 2164 Comment
  CAS-BOT-BC438305  Trianthema portulacastrum John Thomas Howell; Gordon H. True 1967-9-21 43964 Tulare About 4 1/2 miles east-northeast of Pixley. Outside fence at NW corner. 83 Comment
  UC575714  Trifolium albopurpureum var. dichotomum John Thomas Howell 1935-4-11 12593 Alameda Tesla Hills Comment
  UC1177204  Trifolium depauperatum var. amplectens John Thomas Howell 1946-4-18 21646 Marin Ignacio Comment
  SD113219  Trifolium eriocephalum Darley F. Howe 1958-7-1 4858 Del Norte Sanger Peak Road, 11 miles south of the north entrance to Siskiyou National Forest 1646 Comment
  JEPS33666  Trifolium gracilentum var. gracilentum John Thomas Howell 1926-3-28 1776 Napa near Calistoga (Myrtledale Hot Springs) Comment
  RSA128935  Trifolium macraei J. T. Howell 1949-5-25 25333 Marin Point Reyes Peninsula Comment
  CAS-BOT-BC230887  Trifolium productum John Thomas Howell 1937-7-24 13402 Siskiyou Caribou Basin, Salmon-Trinity Alps 2286 Comment
  SD113235  Trifolium wormskioldii Darley F. Howe 1936-7-1 390 San Diego Laguna Mountains Comment
  SD69944  Trillium chloropetalum Darley F. Howe 1968-5-28 4537 Unknown Divide between Mendocino and Tehama Counties. 1768 Comment
  SD44180  Triphysaria pusilla Darley F. Howe 1948-5-20 Placer Placer Co. 456 Comment
  CAS-BOT-BC200121  Trisetum canescens John Thomas Howell 1950-7-19 27082 Tulare Bakeoven to Hessian Meadows 2529 Comment
  CAS-BOT-BC193573  Trisetum spicatum John Thomas Howell 1946-7-20 22538 Fresno Mono Rock 3352 Comment
  CAS-BOT-BC193577  Trisetum spicatum John Thomas Howell 1948-7-24 24988 Fresno Bullfrog Lake 3240 Comment
  CAS-BOT-BC200286  Trisetum spicatum John Thomas Howell 1940-8-1 15786 Tulare Between Reflection Lake and Harrison Pass Comment
  CAS-BOT-BC200290  Trisetum spicatum John Thomas Howell 1951-7-20 28006 Tulare Southeast of Farewell Gap 3291 Comment
  CAS-BOT-BC200411  Trisetum spicatum John Thomas Howell; Gordon H. True 1970-6-23 46632 Tulare NE end of Big Meadow, Kern Plateau 2377 Comment
  CAS-BOT-BC200433  Trisetum spicatum John Thomas Howell 1944-8-15 20539 Tuolumne Mt. Conness 3505 Comment
  CAS-BOT-BC521294  Triteleia ixioides subsp. anilina John Thomas Howell 1960-5-2 35241 Mariposa Sierra Nevada, Northwest of Coulterville Comment
  CAS-BOT-BC526505  Triteleia laxa John Thomas Howell 1963-5-5 38977 Merced Mustang Grade, west of Priest Valley 670 Comment
  CAS-BOT-BC526777  Triteleia laxa John Thomas Howell 1956-6-17 31575 San Francisco Summit ridge of Bayview Hills Comment
  CAS-BOT-BC200471  Triticum aestivum John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-6-26 53073 Calaveras Near Dorrington 1524 Comment
  CAS-BOT-BC200513  Triticum aestivum John Thomas Howell 1956-4-29 31308 San Francisco Embarcadero at Berry St., San Francisco Comment
  CAS-BOT-BC67439  Tropidocarpum gracile John Thomas Howell 1960-3-25 35173 Kern Sierra Nevada. Wofford Mountains. 807 Comment
  CAS-BOT-BC67494  Tropidocarpum gracile John Thomas Howell 1930-5-12 4871 Los Angeles 1 mile north of Acton. Comment
  SD113153  Tropidocarpum gracile Darley F. Howe 1938-3-19 596 San Diego North end of Pt. Loma. Comment
  SDSU1321  Tropidocarpum gracile D. F. Howe 1962-4-15 3192 San Bernardino 3.5 miles north of junction with #91 on #395. 1097 Comment
  CAS-BOT-BC74137  Turritis glabra John Thomas Howell; Gordon H. True 1968-5-14 44381 Tulare Sierra Nevada. Kern Plateau. Cherry Hill Road at Rincon Trail, Brush Creek Canyon. 1463 Comment
  UC1177406  Typha angustifolia John Thomas Howell 1948-9-19 25288 Marin Phoenix Lake Mt. Tamalpais; , Phoenix Lake Comment
  SD112126  Typha latifolia Darley F. Howe 1937-8-22 582 San Diego Irrigation ditch, Chula Vista Comment
  CAS-BOT-BC208024  Ulex europaeus John Thomas Howell 1953-2-1 28921 Santa Cruz in hills ne. of Scott [Scott's] Valley Comment
  UCD111323  Ulmus pumila John Thomas Howell 1958-5-29 33624 Inyo Bishop. 1264 Comment
  CHSC52405  Umbellularia californica M. P. Howe 1984-4-20 14 Butte Doe Mill Summit. 579 Comment
  UCD138039  Umbellularia californica John Thomas Howell 1965-4-26 41150 Madera Sierra Nevada, 3 miles south of Oakhurst. Comment
  CAS-BOT-BC381914  Uropappus lindleyi John Thomas Howell 1967-5-24 42254 Marin Dakin Lane, just north of Old St. Hilary's Church, Tiburon Comment
  CAS-BOT-BC404002  Urtica dioica subsp. holosericea John Thomas Howell 1957-8-19 32914 San Francisco San Francisco. Near Quarry Lake, Golden Gate Park Comment
  CAS-BOT-BC193998  Vaccinium cespitosum John Thomas Howell 1958-7-20 33693 Fresno Granite Basin, Sierra Nevada 3048 Comment
  CAS-BOT-BC193889  Vaccinium ovatum John Thomas Howell 1931-4-13 6345 Santa Barbara Near west end, Santa Cruz Island Comment
  POM203931  Vaccinium parvifolium J. T. Howell 1927-8-25 3057 Mendocino 3 miles east of Ft. Bragg. Comment
  RSA70260  Vaccinium scoparium J. T. Howell 1939-8-6 s.n. Siskiyou Marble Mountains Comment
  CAS-BOT-BC391330  Velezia rigida John Thomas Howell 1953-5-24 29029 Tuolumne At Jacksonville 274 Comment
  SD81275  Viola adunca Darley F. Howe 1969-5-31 Del Norte Rowdy Creek Road 609 Comment
  SD114512  Viola douglasii Darley F. Howe 1939-4-11 799 San Diego Julian Comment
  SEINET11991645  Viola douglasii M. P. Howe 1984-1 16 Butte Paradise West Quadrangle, Salmon Hole, upper Bidwell Park 183 Comment
  SDSU11424  Viola lobata D. F. Howe 1965-5-21 4068 Placer Canyon on south side of north fork of American River between Forest hill and Yankee Jims. 914 Comment
  CAS-BOT-BC530099  Viola lobata subsp. lobata John Thomas Howell 1962-6-15 37464 Butte near Magalia 731 Comment
  SD60944  Viola macloskeyi Darley F. Howe 1964-7-19 Fresno Badger Flat east of Huntington Lake, Sierra Nat. Forest 2438 Comment
  CAS-BOT-BC270136  Viola pinetorum var. grisea John Thomas Howell 1962-7-11 38572 Kern N slope of Black Mountain, Greenhorn Mountains 2255 Comment
  SD69975  Viola sempervirens Darley F. Howe 1968-5-22 Unknown 8 miles north of Jenner, California on route 1. Comment
  CAS-BOT-BC203024  Vitis californica John Thomas Howell 1961-9-22 36751 Butte Feather River Highway 3 miles from Oroville Comment
  CAS-BOT-BC385041  Vitis californica John Thomas Howell; H. Keith Wagnon 1980-5-28 53689 Plumas Sierra Nevada: Indian Falls, near Indian Creek 975 Comment
  CAS-BOT-BC193599  Vulpia bromoides John Thomas Howell 1964-4-26 40445 Mariposa Southeast of Mariposa on the road to Morman Bar - Sierra Nevada 594 Comment
  CAS-BOT-BC198786  Vulpia bromoides John Thomas Howell 1941-5-25 16198 Marin West Point to West Peak, Mt. Tamalpais Comment
  CAS-BOT-BC198790  Vulpia bromoides John Thomas Howell 1939-4-23 14617 Marin Upper Throckmorton Trail, Mt. Tamalpais Comment
  CAS-BOT-BC199900  Vulpia bromoides John Thomas Howell 1947-6-26 23314 Sonoma Cunningham Marsh Comment
  RSA114301  Vulpia eastwoodiae J. T. Howell 1957-4-13 32022 San Joaquin Corral Hollow. Comment
  UCD94552  Vulpia microstachys John Thomas Howell 1965-4-26 41165 Madera 3 miles south of Oakhurst. 914 Comment
  CAS-BOT-BC183207  Vulpia microstachys var. ciliata John Thomas Howell; Walter Knight; Irja Knight; Gordon True 1967-6-12 1984 Plumas Near barn in valley proper. Butterfly Botanical Area and Vicinity 1036 Comment
  CAS-BOT-BC183682  Vulpia microstachys var. ciliata John Thomas Howell 1957-4-13 32022 San Joaquin Corral Hollow Comment
  CAS-BOT-BC199974  Vulpia microstachys var. ciliata John Thomas Howell; R. C. Barneby 1954-5-14 29574 Tehama 9 miles east of Paynes Creek 1005 Comment
  UC817987  Vulpia microstachys var. ciliata John Thomas Howell 1938-6-9 13909 Marin Laurel Dell; Mt. Tamalpais Comment
  RSA99653  Vulpia microstachys var. ciliata J. T. Howell 1953-5-24 29026 Tuolumne Near Chinese Camp. 381 Comment
  CAS-BOT-BC183944  Vulpia microstachys var. microstachys John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49202 Lassen Elysian Valley northwest of Janesville 1325 Comment
  CAS-BOT-BC184256  Vulpia microstachys var. pauciflora John Thomas Howell; Gordon H. True 1971-6-15 47809 Kern Flying Dutchman Creek canyon on Havilah-Mt. Breckenridge road 1249 Comment
  CAS-BOT-BC184320  Vulpia microstachys var. pauciflora John Thomas Howell 1943-5-11 18020 Lake 1 mile south of Lakeport Comment
  CAS-BOT-BC184331  Vulpia microstachys var. pauciflora John Thomas Howell 1945-6-19 21055 Lake Sawmill Flat, Bartlett Mountain 1219 Comment
  CAS-BOT-BC184351  Vulpia microstachys var. pauciflora John Thomas Howell 1946-5-14 21839 Marin Between Barths Retreat and Potrero Meadow, Mt. Tamalpais Comment
  CAS-BOT-BC184619  Vulpia microstachys var. pauciflora John Thomas Howell; Gordon H. True 1971-7-15 48558 Tulare Northeast of Taylor Meadow between Church Dome and Black Mt., Kern Plateau 2316 Comment
  UCD94542  Vulpia microstachys var. pauciflora John Thomas Howell 1958-7-30 34100 Fresno Simpson Meadow, Middle Fork of the Kings River. 1813 Comment
  UCD94548  Vulpia microstachys var. pauciflora John Thomas Howell 1962-7-9 38338 Kern Isabella. 762 Comment
  GH361292  Vulpia myuros J. T. Howell 1943-5-22 18115 Unknown Mulholland Drive 1.3 miles west of Laurel Canyon Boulevard 350 Comment
Read comments
May 25 2012
  UCD94779  Vulpia myuros John Thomas Howell 1960-6-7 35416 Fresno Kings Canyon Road, 6.5 miles NE of Cherry Gap. 1554 Comment
  SEINET199933 Image available Vulpia myuros f. megalura John Thomas Howell 1943-5-22 18137 Marin Fairfax Hills Comment
  CAS-BOT-BC185680  Vulpia myuros subsp. megalura John Thomas Howell 1962-6-17 37684 Plumas Butterfly Valley 1036 Comment
  CAS-BOT-BC184679  Vulpia myuros subsp. megalura John Thomas Howell 1954-5-16 s.n. Sacramento 5 miles sw. of Folsom Comment
  CAS-BOT-BC185737  Vulpia myuros subsp. megalura John Thomas Howell 1957-5-5 32164 San Francisco East end of 22nd St. Comment
  SEINET10604546  Vulpia myuros var. hirsuta John Thomas Howell 1948-5-16 Howell 24299 Marin Upper part of Cascade Canyon, Mt. Tamalpais. Comment
  CAS-BOT-BC185863  Vulpia octoflora var. hirtella John Thomas Howell 1960-5-2 35253 Mariposa Near Coulterville 548 Comment
  CAS-BOT-BC185870  Vulpia octoflora var. hirtella John Thomas Howell 1958-5-24 33318 Inyo Whitney Portal road 1981 Comment
  CAS-BOT-BC383699  Xanthium strumarium John Thomas Howell 1970-11-8 47518 Kern Lake Isabella. 4 miles from South Fork Kern River bridge on road from Weldon to Kernville 792 Comment
  CAS-BOT-BC383788  Xanthium strumarium John Thomas Howell 1952-10-19 28855 Santa Clara Near Sargent Comment
  CAS-BOT-BC530475  Zigadenus fontanus John Thomas Howell 1942-6-21 17000 Marin Warm Spring, Big Carson Comment
  HSC15777  Zigadenus fremontii J. Wendell Howe 1930-3-30 78 Humboldt Diamond Canyon, presumed Humboldt Co. but not stated Comment



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