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

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

 Please cite data retrieved from this page: Data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/cch_archive/).
 Records are made available under the CCH Data Use Terms.

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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  CAS-BOT-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
  CAS-BOT-BC78026  Abies concolor John Thomas Howell 1962-7-8 38279 Kern 1.5 miles se. of Summit, Greenhorn Mountains 1524 Comment
  CAS-BOT-BC383921  Abronia pogonantha John Thomas Howell; Gordon H. True 1967-5-30 42421 Inyo Ninemile Canyon 1432 Comment
  CAS-BOT-BC447792  Acaena pinnatifida var. californica John Thomas Howell 1957-5-17 s.n. San Francisco Bayview Hills Comment
  CAS-BOT-BC219670  Acanthomintha lanceolata John Thomas Howell 1957-5-19 32359 Stanislaus Del Puerto Canyon Comment
  CAS-BOT-BC330646  Acer glabrum var. diffusum John Thomas Howell 1950-7-12 26728 Inyo Sage Flat to Olancha Pass 2743 Comment
  CAS-BOT-BC331625  Acer macrophyllum John Thomas Howell 1969-9-12 46088 El Dorado Sierra Nevada. Near Bridal Veil Falls, 3 miles W of Riverton Comment
  CAS-BOT-BC21618  Achillea millefolium John Thomas Howell 1926-4-24 1942 San Francisco Lake Merced Comment
  CAS-BOT-BC21750  Achillea millefolium John Thomas Howell 1962-6-16 37581 Butte Pentz road 2 mi. s. of Magalia 609 Comment
  CAS-BOT-BC30091  Achillea millefolium John Thomas Howell 1955-8-6 30896 Sonoma Dunes at Bodega Head Comment
  CAS-BOT-BC30429  Achillea millefolium John Thomas Howell 1939-8-6 15093 Siskiyou Spirit Lake, Marble Mountains 1828 Comment
  RSA14946  Achillea millefolium var. puberula John T. Howell 1934-9-23 12573 Solano Suisun Marshes at Benecia [Benicia] Junction Comment
  CAS-BOT-BC260346  Achnatherum hymenoides John Thomas Howell 1958-5-24 33273 Inyo Whitney Portal Road 2346 Comment
  CAS-BOT-BC218025  Achnatherum latiglume John Thomas Howell 1962-7-9 38394 Kern Near Park Headquarters, Greenhorn Mountains 1798 Comment
  CAS-BOT-BC210647  Achnatherum lemmonii John Thomas Howell 1943-8-3 18979 Glenn Plaskett Meadows 1828 Comment
  CAS-BOT-BC210690  Achnatherum lemmonii John Thomas Howell 1960-7-22 35887 Plumas Lassen Volcanic National Park. Drakesbad 1828 Comment
  UCD50595  Achnatherum lemmonii John Thomas Howell 1960-7-22 35887 Plumas Lassen Volcanic National Park. Drakesbad. 1676 Comment
  CAS-BOT-BC210767  Achnatherum nelsonii John Thomas Howell 1946-7-16 22442 Inyo Box Lake, Rock Creek Lake Basin 3200 Comment
  CAS-BOT-BC210801  Achnatherum nelsonii John Thomas Howell 1940-7-30 15725 Tulare East Lake 2926 Comment
  GH361432  Achnatherum nevadense J. T. Howell 1941-7-30 16493 Unknown Near Garnet Lake 2956 Comment
  UC710575  Achnatherum nevadense John Thomas Howell 1944-8-6 20019 Tuolumne slope n of Tuoloumne Meadows Comment
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Feb 5 2015
  CAS-BOT-BC216358  Achnatherum occidentale John Thomas Howell 1944-8-14 20445 Tuolumne Glen Aulin Trail, Tuolumne Meadows Comment
  CAS-BOT-BC216979  Achnatherum occidentale John Thomas Howell 1951-7-17 27855 Tulare White Chief Trail 2895 Comment
  CAS-BOT-BC216997  Achnatherum occidentale John Thomas Howell 1948-7-26 25025 Tulare Bubbs Creek Canyon 3139 Comment
  SEINET196560  Achnatherum occidentale J. T. Howell 1947-7-25 San Bernardino Whitewater Cirque Mt. San Gorgonio San Bernardino Mts. Comment
  UCD50975  Achnatherum occidentale John Thomas Howell 1926-7-24 2100 Plumas near Prattville. 1463 Comment
  CAS-BOT-BC210849  Achnatherum occidentale subsp. californicum John Thomas Howell 1960-7-20 35787 Plumas Lassen Volcanic National Park. Between Boiling Springs Lake and Terminal Geyser 1859 Comment
  CAS-BOT-BC216494  Achnatherum occidentale subsp. californicum John Thomas Howell 1962-7-10 38475 Kern Shirley Meadows, Greenhorn Mountains 2011 Comment
  CAS-BOT-BC210939  Achnatherum occidentale subsp. pubescens John Thomas Howell 1962-5-22 37338 Tulare Johnsondale 1423 Comment
  CAS-BOT-BC210959  Achnatherum occidentale subsp. pubescens John Thomas Howell; Gordon H. True 1967-7-5 43078 Tulare 6.4 miles north of Chimney Meadow, Kern Plateau 2225 Comment
  CAS-BOT-BC218626  Achnatherum occidentale subsp. pubescens John Thomas Howell 1948-7-31 25223 Inyo East side of Kearsarge Pass 3505 Comment
  CAS-BOT-BC218064  Achnatherum pinetorum John Thomas Howell 1948-7-19 24787 Inyo Ridge between Flower and Bench Lakes Comment
  GH361497  Achnatherum pinetorum J. T. Howell 1946-7-26 22764 Unknown Mono Mesa 3657 Comment
  CAS-BOT-BC391362  Aconitum columbianum subsp. columbianum John Thomas Howell 1943-8-7 3 Glenn Plaskett Meadows 1828 Comment
  CAS-BOT-BC391455  Aconitum columbianum subsp. columbianum John Thomas Howell 1943-7-16 18435 Nevada Boreal Ridge, West side of Donner Pass near Norden 2133 Comment
  CAS-BOT-BC30919  Adenophyllum porophylloides John Thomas Howell 1927-11-26 3258 San Diego San felipe wash Comment
  CAS-BOT-BC9068  Aegilops triuncialis John Thomas Howell 1954-5-16 29582 Sacramento 4 miles southeast of Folsom on Placerville Road Comment
  CAS-BOT-BC295562  Agnorhiza elata John Thomas Howell; R. C. Barneby 1954-5-10 29344 Fresno Grade above Tollhouse 792 Comment
  JEPS28956  Agnorhiza invenusta John Thomas Howell 1962-7-9 38402 Kern Greenhorn Mountains, near park headquarters Sierra Nevada 1798 Comment
  CAS-BOT-BC295681  Agnorhiza ovata John Thomas Howell; Gordon H. True 1971-7-15 48530 Tulare On Dome Lands Trail, about 0.5 miles south of Church Dome. Kern Plateau 2316 Comment
  CAS-BOT-BC15276  Agoseris heterophylla John Thomas Howell 1934-6-12 12013 Modoc Between Davis Creek and Plum Valley Comment
  CAS-BOT-BC22947  Agoseris heterophylla John Thomas Howell 1944-6-18 s.n. Marin Fish Grade, Mt. Tamalpais Comment
  POM203659  Agoseris heterophylla John T. Howell 1933-5-14 11260 Contra Costa Hills east of St. Mary's college Comment
  CAS-BOT-BC13132  Agoseris hirsuta John Thomas Howell 1937-6-13 13050 Marin Bolinas Comment
  CAS-BOT-BC13278  Agoseris monticola J. T. Howell 1942-8-7 17783 Tulare Lost Canyon 3048 Comment
  CAS-BOT-BC13365  Agoseris retrorsa J. T. Howell 1958-7-23 33786 Fresno Simpson Meadow, Middle Fork of Kings River 1828 Comment
  CAS-BOT-BC13405  Agoseris retrorsa J. T. Howell 1962-7-10 38509 Kern Summit of Cook's Peak, Greenhorn Mountains. 2103 Comment
  CAS-BOT-BC42904  Agoseris retrorsa John Thomas Howell; T. C. Fuller; G. D. Barbe 1980-7-16 53808 Tulare Sherman Pass Road, 4.5 miles east of junction with Cherry Hill Road, Kern Plateau 2255 Comment
  SEINET10506825  Agrostis John Thomas Howell 1947-5-14 Howell 23149 Marin Drakes Estero, WNW of Mount Vision. Restricted to gravelly slope on outcrop of diatomaceous shale of Monterey Series. Type collection. Comment
  SEINET10806860  Agrostis John Thomas Howell 1947-4-23 Howell 23062 Marin Drakes Estero west of Mt. Vision, Pt. Reyes Peninsula. Comment
  SEINET3916093  Agrostis avenacea John Thomas Howell 1957-6-16 32643 San Francisco San Francisco. Third and Davidson streets.; 0 Comment
  CAS-BOT-BC127082  Agrostis exarata John Thomas Howell 1961-9-24 36918 Plumas Sierra Nevada. Feather River bed southwest of Beckwourth. 1487 Comment
  CAS-BOT-BC127094  Agrostis exarata John Thomas Howell 1959-9-25 35005 Plumas Sierra Nevada. 2 miles east of Portola. 1484 Comment
  CAS-BOT-BC127100  Agrostis exarata John Thomas Howell 1961-9-23 36867 Plumas Sierra Nevada. Indian Valley. 1082 Comment
  CAS-BOT-BC127118  Agrostis exarata John Thomas Howell 1943-7-14 18314 Nevada West side of Donner Pass near Norden. 2133 Comment
  CAS-BOT-BC127221  Agrostis exarata John Thomas Howell 1945-7-29 21345 Marin Bolinas. Comment
  CAS-BOT-BC139665  Agrostis gigantea John Thomas Howell 1943-7-3 18244 Marin Sausalito. Comment
  CAS-BOT-BC139714  Agrostis gigantea John Thomas Howell 1977-8-1 52451 Calaveras Sierra Nevada. Dorrington. 1463 Comment
  CAS-BOT-BC139172  Agrostis idahoensis John Thomas Howell 1942-8-1 17517 Tulare Sky Parlor Meadow. Chagoopa Plateau. Comment
  CAS-BOT-BC139244  Agrostis idahoensis John Thomas Howell 1927-7-10 2763 B San Bernardino San Bernardino Mountains. On Mill Creek Road at Riverside Municipal Camp. 2225 Comment
  CAS-BOT-BC139276  Agrostis idahoensis John Thomas Howell; Gordon H. True 1968-7-16 4412 Mono Sierra Nevada. Virginia Lakes basin, ca. 3.25 miles southwest of Conway Summit. 2956 Comment
  CAS-BOT-BC139298  Agrostis idahoensis John Thomas Howell; Gordon H. True 1973-8-1 50232 Lassen Sierra Nevada. Headwaters of Baxter Creek. East slope of Diamond Range south of Susanville. 2133 Comment
  CAS-BOT-BC139251  Agrostis idahoensis John Thomas Howell 1960-7-20 35734 Plumas Lassen Volcanic National Park. Between Boiling Springs Lake and Drakesbad. 1828 Comment
  CAS-BOT-BC197  Agrostis longiligula var. australis John Thomas Howell 1943-7-4 18250 Marin Ledum Swamp Comment
  CAS-BOT-BC138877  Agrostis microphylla John Thomas Howell 1954-5-18 29802 Amador Sierra Nevada. 2 miles north northeast of Buena Vista. 91 Comment
  CAS-BOT-BC138899  Agrostis pallens John Thomas Howell; Gordon H. True 1966-7-11 41652 Tulare Sierra Nevada. Kern Plateau. Poison Meadow. 2286 Comment
  CAS-BOT-BC139049  Agrostis pallens John Thomas Howell 1945-9-13 21465 Marin Point Reyes Peninsula. Near radio station. Comment
  UCD53198  Agrostis pallens John Thomas Howell; Gordon H. True 1970-7-28 47009 Tulare west side of Big Meadow just south of Pipe Spring, Kern Plateau. 2377 Comment
  UCD53335  Agrostis scabra var. geminata John Thomas Howell 1960-7-20 35774 Plumas Boiling Springs Lake. 1798 Comment
  CAS-BOT-BC138625  Agrostis stolonifera John Thomas Howell 1973-7-10 s.n. Lassen Sierra Nevada. In city park, Susanville. 1295 Comment
  CAS-BOT-BC64481  Ailanthus altissima John Thomas Howell 1944-7-23 s.n. Marin Santa Venetia. Comment
  GH341373  Aira caryophyllea J. T. Howell 1943-6-3 Unknown Bootjack, Mt. Tamalpais, Marin County Comment
  CAS-BOT-BC138193  Aira praecox John Thomas Howell 1946-5-26 21958 Marin Ocean bluff, Point Reyes Lighthouse. Comment
  CAS-BOT-BC445387  Alisma plantago-aquatica John Thomas Howell 1944-6-25 19652 Marin Santa Venetia Comment
  CAS-BOT-BC131967  Allium John Thomas Howell; R. C. Barneby 1954-5-14 29570 Tehama 9 miles east of Paynes Creek 1005 Comment
  CAS-BOT-BC459453  Allium bisceptrum John Thomas Howell 1941-7-31 16550 A Madera Agnew Pass Trail Comment
  CAS-BOT-BC466581  Allium campanulatum John Thomas Howell 1943-7-20 18618 Nevada Castle Rock Comment
  CAS-BOT-BC469115  Allium falcifolium John Thomas Howell 1941-4-6 16179 Contra Costa Ridge east of Deer Flat, Mt. Diablo Comment
  CAS-BOT-BC469131  Allium falcifolium John Thomas Howell 1945-6-20 21100 Lake Pinnacle Rock, Bartlett Mountain Comment
  CAS-BOT-BC472781  Allium neapolitanum John Thomas Howell 1969-4-20 45513 Marin 2nd and Shaver Streets, San Rafael Comment
  CAS-BOT-BC472802  Allium obtusum John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-6-28 53171 Alpine Ebbetts Pass Rd., Cape Horn, NE of Lake Alpine, Sierra Nevada 2438 Comment
  CAS-BOT-BC474076  Allium platycaule John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50684 Lassen South and southeast of Diamond Mountain, Sierra Nevada 2286 Comment
  CAS-BOT-BC132145  Allium siskiyouense Thomas Howell 1884-6-17 s.n. Siskiyou Siskiyou Mountains Comment
  CAS-BOT-BC131948  Allium tribracteatum John Thomas Howell; Gordon H. True 1967-7-11 43372 Plumas About 2 miles southeast of Mt. Hough 1828 Comment
  CAS-BOT-BC474324  Allium validum John Thomas Howell 1943-8-5 19061 Glenn Plaskett Meadows 1828 Comment
  UCD109971  Alnus incana subsp. tenuifolia John Thomas Howell 1959-9-24 34936 Plumas Butterfly Creek, near mouth. Comment
  CAS-BOT-BC170696  Alnus rhombifolia John Thomas Howell 1959-9-24 34943 Plumas Spanish Creek at mouth of Butterfly Creek. Sierra Nevada 883 Comment
  CAS-BOT-BC170989  Alnus rhombifolia John Thomas Howell 1940-5-12 s.n. Marin Lagunitas Creek Canyon Comment
  UCD110009  Alnus rhombifolia John Thomas Howell 1960-3-26 35183 Kern Kernville. Comment
  UCD55869  Alopecurus aequalis John Thomas Howell; Gordon H. True 1967-7-4 43042 Tulare Kern Plateau, Fish Creek about 3.5 miles south of Troy Meadow. 2255 Comment
  CAS-BOT-BC138072  Alopecurus aequalis var. aequalis John Thomas Howell 1949-7-31 25954 Tulare Golden Trout Creek. 2834 Comment
  CAS-BOT-BC138149  Alopecurus aequalis var. aequalis John Thomas Howell 1960-8-20 36223 Tehama Lassen Volcanic National Park. Morgan. 1463 Comment
  CAS-BOT-BC137895  Alopecurus saccatus John Thomas Howell; Gordon H. True 1967-5-31 42520 Tulare Vernal pool natural area in Valley Grassland, about 4.5 miles east-northeast of Pixley. 83 Comment
  RSA201739  Amaranthus arenicola J. T. Howell 1963-8-7 40066 Monterey Bank of San Lorenzo Creek just south of King City Comment
  UCD97195  Amaranthus blitoides John Thomas Howell 1945-9-28 21521 Mono Mono Lake. Comment
  UCD97196  Amaranthus blitoides John Thomas Howell 1959-9-25 35002 Plumas 2 miles east of Portola. 1484 Comment
  RSA223383  Amaranthus powellii J. T. Howell 1963-8-5 39943 Monterey Salinas, northern city limits Comment
  UC1176785  Amaranthus retroflexus John Thomas Howell 1945-9-16 1475 Marin near San Rafael Comment
  RSA215949  Amaranthus retroflexus J. T. Howell 1957-7-28 32836 San Francisco Third and Davidson Streets, San Francisco. Comment
  CAS-BOT-BC13679  Ambrosia artemisiifolia John Thomas Howell 1956-7-15 31680 San Francisco Waterfront Street near Mission Rock Terminal Comment
  CAS-BOT-BC45020  Ambrosia psilostachya John Thomas Howell 1926-9-9 2189 Marin San Rafael Comment
  A346839  Amelanchier utahensis J. T. Howell 1945-6-20 21083 Unknown Sawmill Flat, Bartlett Mountain 1219 Comment
  CAS-BOT-BC136873  Amelanchier utahensis John Thomas Howell; Gordon H. True 1969-6-25 45848 Sierra 3 miles north of Bassetts on road to Gold Lake 1950 Comment
  CAS-BOT-BC142511  Amelanchier utahensis John Thomas Howell 1947-4-13 23056 Marin Tiburon Peninsula Comment
  GH424813  Amsinckia J. T. Howell 1933-5-16 11296 Unknown San Francisco, Golden Gate Park Comment
  GH424644  Amsinckia J. T. Howell 1934-6-13 12085 Unknown Surprise Valley, near Fort Bidwell Comment
  GH424784  Amsinckia J. T. Howell 1933-4-22 11074 Unknown Near San Benito Comment
  GH424807  Amsinckia J. T. Howell 1931-3-19 5862 Unknown Near Coalinga Comment
  GH424840  Amsinckia J. T. Howell 1931-3-22 5972 Unknown Stone Canyon Comment
  CAS-BOT-BC54158  Amsinckia menziesii John Thomas Howell 1934-6-16 12218 Modoc 5 mi. from Adin on road to Alturas. Comment
  UCD119796  Amsinckia spectabilis John Thomas Howell 1933-8-19 11606 Monterey Cypress Point, Monterey Peninsula. Comment
  CAS-BOT-BC45123  Anaphalis margaritacea John Thomas Howell 1940-7-29 15677 Fresno Between Charlotte Creek and Junction Meadow, Bubbs Creek Comment
  RSA201432  Anchusa officinalis J. T. Howell 1955-7-17 30714 Trinity Near Hayfork. 732 Comment
  CAS-BOT-BC137800  Andropogon virginicus var. virginicus John Thomas Howell 1959-9-20 34669 Butte Sierra Nevada. Eastern outskirst of Oroville. Lower foothills. 60 Comment
  CAS-BOT-BC46928  Androsace elongata subsp. acuta John Thomas Howell 1925-3-22 844 Alameda Arroyo Mocho at ne. base of Cedar Mt. Comment
  CAS-BOT-BC128554  Androsace septentrionalis John Thomas Howell 1950-7-22 27236 Tulare Summit ridge, Olancha Peak 3698 Comment
  CAS-BOT-BC128589  Androsace septentrionalis John Thomas Howell 1949-8-9 26193 Tulare Cirque Peak 3733 Comment
  CAS-BOT-BC400388  Anemopsis californica John Thomas Howell; Gordon H. True 1967-9-18 43789 Tulare Lamont Meadow, Kern Plateau 1645 Comment
  CAS-BOT-BC271456  Anisocarpus madioides John Thomas Howell 1945-6-20 21099 Lake Near Pinnacle Rock, Bartlett Mountain Comment
  CAS-BOT-BC64034  Anisocoma acaulis John Thomas Howell 1948-4-25 24239 Kern Between Kernville and Isabella Comment
  JEPS33925  Antennaria argentea J. Thomas Howell 1925-6-14 1153 El Dorado Emerald Bay Camp; Lake Tahoe Comment
  CAS-BOT-BC69168  Antennaria dioica John Thomas Howell 1937-7-21 13177 Siskiyou South Fork of Salmon River near Big Flat 1524 Comment
  CAS-BOT-BC77346  Antennaria media John Thomas Howell 1937-7-24 13401 Siskiyou Caribou Basin, Salmon-Trinity Alps 2286 Comment
  GH414170  Antennaria pulchella J. T. Howell 1941-7-24 16440 Unknown Near Garnet Lake 2956 Comment
  UC891547  Antennaria rosea J. Thomas Howell 1937-7-21 13177 Siskiyou near Big Flat; South Fork of Salmon River 1524 Comment
  CAS-BOT-BC84759  Antennaria rosea subsp. rosea John Thomas Howell 1939-8-8 15183 Siskiyou Black Mts., Marble Mts. Comment
  CAS-BOT-BC84684  Anthemis cotula John Thomas Howell 1924-10-11 668 Alameda Berkeley Comment
  CAS-BOT-BC84619  Anthemis cotula John Thomas Howell 1956-7-1 31649 San Francisco Embarcadero and Vallejo St. Comment
  CAS-BOT-BC137757  Anthoxanthum odoratum John Thomas Howell 1945-6-18 20969 Lake Baumgartner Meadow north of Cobb Mountain. Comment
  POM203040  Anthriscus caucalis J. T. Howell 1934-5-20 11829 Santa Clara Hills west of Los Gatos Comment
  RSA88120  Antirrhinum vexillocalyculatum subsp. intermedium J. T. Howell 1951-6-26 27544 Plumas Feather River Canyon. 854 Comment
  CAS-BOT-BC457536  Aphanes occidentalis John Thomas Howell 1957-4-28 32063 Monterey Santa Lucia Mountains; roadside depression 1.6 miles N.W. of summit of Jamesburg road. 640 Comment
  CAS-BOT-BC395031  Aquilegia formosa John Thomas Howell 1944-8-12 20429 Tuolumne Gaylor Lakes 3261 Comment
  CAS-BOT-BC409154  Aquilegia pubescens John Thomas Howell 1948-7-26 25058 Tulare Center Basin 3413 Comment
  RSA88489  Arabis holboellii var. pinetorum J. T. Howell 1951-7-19 27949 Tulare Monarch Lakes Trail. Mineral King and vicinity. 2439 Comment
  UCD101909  Arceuthobium americanum John Thomas Howell; Gordon H. True 1970-7-28 47048 Tulare Kern Plateau; at s.e. end of Big Meadow. 2377 Comment
  RSA201481  Arceuthobium californicum J. T. Howell 1962-9-23 38805 Kern Near Tiger Flat. Greenhorn Mtns. 1982 Comment
  CAS-BOT-BC409948  Arceuthobium campylopodum John Thomas Howell; Gordon H. True 1969-9-30 46381 A Tulare Cherry Hill Road, 4 miles from Burton Camp, canyon of Poison Meadow Creek, Kern Plateau 2194 Comment
  CAS-BOT-BC410091  Arceuthobium occidentale John Thomas Howell 1962-7-12 38665 Kern 3 miles N of Kernville 822 Comment
  CAS-BOT-BC24157  Arctostaphylos John Thomas Howell 1931-6-18 6741 Del Norte Rocky slope, summit of road between Crescent City and Grants pass 731 Comment
  SEINET10736234 Image available Arctostaphylos acutifolia John Thomas Howell 1943-8-8 Howell 19212 Tehama Log Spring Ridge. 1.1 miles west of Ranger Station, Tehama Co. Comment
  CAS-BOT-BC25319  Arctostaphylos bakeri John Thomas Howell 1933-4-2 10958 Sonoma Serpentine ridge, 2 miles E of Occidental Comment
  POM203044  Arctostaphylos canescens subsp. canescens J. T. Howell 1934-3-3 11748 Sonoma Between Fort Ross and Stewart's Point. Comment
  CAS-BOT-BC23851  Arctostaphylos canescens subsp. sonomensis John Thomas Howell 1931-3-14 5761 Sonoma Rincon Ridge, near Santa Rosa Comment
  A350169  Arctostaphylos canescens var. sonomensis J. T. Howell 1937-4-11 12895 Unknown Rincon Ridge, ne. of Santa Rosa Comment
  CAS-BOT-BC23674  Arctostaphylos columbiana John Thomas Howell 1934-3-4 11769 Mendocino Along Navarro River, 5 miles west of Navarro. Comment
  CAS-BOT-BC23692  Arctostaphylos columbiana John Thomas Howell 1934-3-3 11753 Mendocino 6 miles south of Point Arena Comment
  CAS-BOT-BC23707  Arctostaphylos columbiana John Thomas Howell 1934-3-4 11756 Mendocino 2 miles east of Mendocino Comment
  POM202852  Arctostaphylos columbiana J. T. Howell 1934-3-4 11765 Mendocino 2 miles east of Mendocino City. Comment
  CAS-BOT-BC23559  Arctostaphylos crustacea John Thomas Howell 1952-3-2 28297 Contra Costa East end of Moraga Ridge summit Comment
  CAS-BOT-BC25136  Arctostaphylos crustacea subsp. crinita John Thomas Howell 1944-6-11 19618 Santa Cruz Sand hills 1 mile E of Felton Comment
  CAS-BOT-BC24970  Arctostaphylos edmundsii John Thomas Howell 1952-3-4 28299 Monterey Just s of Little Sur River. Topotype. Comment
  GH350328  Arctostaphylos glandulosa J. T. Howell 1930-4-6 4676 Unknown 26 miles from Livermore on road to San Antonio Valley Comment
  SEINET8347398  Arctostaphylos glandulosa T. Howell 1886-1 Unknown Gasquet. Comment
  CAS-BOT-BC23356  Arctostaphylos glandulosa subsp. cushingiana John Thomas Howell 1943-7-4 18272 Marin West of Inverness Comment
  SBBG41732  Arctostaphylos glandulosa subsp. cushingiana J. T. Howell 1970-3-31 46498 Monterey Carmel River, Carmel Valley Village Comment
  CAS-BOT-BC23207  Arctostaphylos glandulosa subsp. glandulosa John Thomas Howell 1930-5-18 5174 Los Angeles Rocky slope, Pacoima Canyon, San Gabriel Mts. Comment
  POM180779  Arctostaphylos glandulosa subsp. glandulosa J. T. Howell 1930-7-13 5351 Napa On the edge of the Crater Country' Comment
  RSA127603  Arctostaphylos glandulosa subsp. glandulosa J. T. Howell 1952-3-5 28304 Monterey 2 miles east of Carmel Valley community center. Comment
  UC1042311  Arctostaphylos glandulosa subsp. glandulosa John Thomas Howell 1954-11-3 30137 Monterey Arroyo Seco River Canyon Santa Lucia Mts. Comment
  CAS-BOT-BC24693  Arctostaphylos glandulosa subsp. mollis John Thomas Howell 1928-2-18 3347 Los Angeles On trail to Switzer's, Arroyo Seco, San Gabriel Mts. Comment
  CAS-BOT-BC39349  Arctostaphylos glauca John Thomas Howell 1928-2-11 3343 Los Angeles On trail between Haines Canyon and Mt. Lukens, San Gabriel Mts. Comment
  POM181143  Arctostaphylos hookeri subsp. hookeri J. T. Howell 1931-5-21 6493 Monterey Gibson Canyon, Carmel Highlands. Comment
  A350546  Arctostaphylos manzanita J. T. Howell 1933-4-2 10952 Unknown Serpentine Ridge, 2 miles east of Occidental Comment
  SEINET11989222  Arctostaphylos manzanita J. T. Howell 1975-1 51104 Butte about 2 mi from Paradise on Skyway to Chico 396 Comment
  CAS-BOT-BC38972  Arctostaphylos manzanita subsp. elegans John Thomas Howell 1930-8-24 5454 Lake 4 miles from Middletown on Adams Springs Road Comment
  CAS-BOT-BC38731  Arctostaphylos manzanita subsp. manzanita John Thomas Howell 1930-3-23 4555 Napa East of the Toll House near Mt. St. Helena Comment
  CAS-BOT-BC38817  Arctostaphylos manzanita subsp. manzanita John Thomas Howell 1930-3-23 4567 Lake Four miles from Middletown on road to Adams Springs Comment
  UCD52291  Arctostaphylos mewukka John Thomas Howell 1976-4-2 51577 Plumas In the Transition Life Zone; 2 miles northwest of Spring Garden. 1173 Comment
  CAS-BOT-BC45550  Arctostaphylos nevadensis John Thomas Howell 1925-6-10 1144 El Dorado Eagle Lake Trail, Lake Tahoe Region. 2042 Comment
  SD71281  Arctostaphylos pumila John Thomas Howell 1968-4-18 Monterey Near airport, about 4 mi. E of Monterey Comment
  UCD53743  Arctostaphylos pumila John Thomas Howell 1965-6-15 41358 Monterey Near the Monterey Airport on Salinas Road; about 4 miles east of Monterey. Comment
  A362314  Arctostaphylos stanfordiana subsp. hispidula J. T. Howell 1933-4-2 10953 Unknown 2 miles east of Occidental Comment
  CAS-BOT-BC43930  Arctostaphylos tomentosa subsp. tomentosa John Thomas Howell 1965-6-15 41328 Monterey near summit of road between Pacific Grove and Carmel Comment
  SEINET11989235  Arctostaphylos truei J. T. Howell 1975-1 51112 Butte Skyway & Montana Drive, Paradise 610 Comment
  UCD52615  Arctostaphylos viscida John Thomas Howell 1975-6-15 51108 Butte Skyway near Billie Road, Paradise, Butte County, Transition Zone. 609 Comment
  UCD52616  Arctostaphylos viscida John Thomas Howell 1975-6-15 51101 Butte In Upper Sonoran Zone on volcanic rock, about 2 miles from Paradise on 'Skyway' to Chico, Butte County. 396 Comment
  UCD52621  Arctostaphylos viscida John Thomas Howell 1975-6-15 51085 Butte In Upper Sonoran Zone on volcanic rock, about 2 miles from Paradise on 'Skyway' to Chico, Butte County. 396 Comment
  SEINET7268632  Arctostaphylos viscida J. T. Howell, G. H. True., Jr. 1968-5-13 44293 Tulare Kern Plateau, Cherry Hill Road, Poison Meadow Creek Canyon 1981 Comment
  CAS-BOT-BC46905  Arctostaphylos viscida subsp. mariposa John Thomas Howell 1930-5-14 5071 Kern east slope of the Greenhorn Range 1493 Comment
  CAS-BOT-BC47136  Arctostaphylos viscida subsp. mariposa John Thomas Howell 1962-7-8 38261 Kern Black Mt., s. side. Greenhorn Mountains. 1432 Comment
  CAS-BOT-BC47066  Arctostaphylos viscida subsp. viscida John Thomas Howell; Gordon H. True 1968-6-9 44506 Placer Alta. 1066 Comment
  CAS-BOT-BC47384  Arctostaphylos viscida subsp. viscida John Thomas Howell 1975-6-15 51097 Butte about 2 miles from Paradise on Skyway to Chico 396 Comment
  CAS-BOT-BC48208  Arctostaphylos viscida subsp. viscida John Thomas Howell; Gordon H. True 1970-6-27 46900 Tulare Tule River Canyon, 7 miles above Springville 1005 Comment
  CAS-BOT-BC467181  Arenaria serpyllifolia var. serpyllifolia John Thomas Howell 1963-6-5 39411 Tehama Near Paynes Creek Comment
  CAS-BOT-BC467193  Arenaria serpyllifolia var. serpyllifolia John Thomas Howell 1960-5-3 35276 Tuolumne Sierra Nevada: Stanislaus River Canyon west of Columbia Comment
  CAS-BOT-BC137603  Aristida californica var. californica John Thomas Howell 1928-3-11 3443 Unknown Six miles southeast of Garnet Station, Coachella Valley, Colorado Desert. Comment
Read comments
Aug 24 2019
  SBBG29990  Aristida oligantha J. T. Howell 1939-8-13 El Dorado 8 mi from Folsom on rd to Placerville Comment
  CAS-BOT-BC400432  Aristolochia californica John Thomas Howell 1967-6-22 42644 Butte 3 miles ne. of Pulga Bridge - Canyon of the Feather River North Fork Comment
  CAS-BOT-BC295868  Arnica dealbata John Thomas Howell 1960-8-21 36309 Shasta Lassen Volcanic National Park. Sulphur Works 2133 Comment
  CAS-BOT-BC82487  Arnica discoidea John Thomas Howell 1955-7-8 30639 Monterey Arroyo Seco Road near Escondido Camp, Santa Lucia Mts. 792 Comment
  CAS-BOT-BC82679  Arnica longifolia John Thomas Howell 1958-8-16 34480 Madera On trail to Sadler Lake, near Isberg Lake 2987 Comment
  CAS-BOT-BC82778  Arnica mollis John Thomas Howell 1977-8-2 52466 Alpine Silver Creek, about 1 mile northeast of Lake Alpine on Ebbetts Pass Road 2346 Comment
  CAS-BOT-BC90064  Arnica nevadensis John Thomas Howell 1944-8-14 s.n. Tuolumne Tuolumne Canyon above Glen Aulin Comment
  CAS-BOT-BC15217  Artemisia arbuscula subsp. arbuscula John Thomas Howell 1934-6-13 12098 A Modoc Patterson Mill Road, Warner Mountains 1676 Comment
  CAS-BOT-BC84978  Artemisia arbuscula subsp. arbuscula John Thomas Howell 1939-8-8 15167 Siskiyou Marble Mts., Black Mt. Comment
  CAS-BOT-BC84803  Artemisia douglasiana John Thomas Howell 1962-9-22 38758 Kern Sierra Nevada, Greenhorn Mountains - Kern Co. Park 1828 Comment
  CAS-BOT-BC84805  Artemisia douglasiana John Thomas Howell 1970-11-10 47561 Kern Sierra Nevada, Rancheria Road at Rattlesnake Creek 670 Comment
  CAS-BOT-BC90255  Artemisia douglasiana John Thomas Howell 1930-10-5 5541 Sacramento East bank of Sacramento River near Rio Vista Comment
  CAS-BOT-BC90290  Artemisia douglasiana John Thomas Howell 1961-9-22 36721 Butte Bank of Feather River, Oroville 53 Comment
  CAS-BOT-BC93967  Artemisia douglasiana John Thomas Howell 1936-8-24 12759 Trinity Summit of Scott Mts. n. of Carrville Comment
  CAS-BOT-BC90646  Artemisia ludoviciana subsp. incompta John Thomas Howell 1958-7-23 33809 Fresno Simpson Meadow, Middle Fork of the Kings River 1828 Comment
  CAS-BOT-BC90670  Artemisia ludoviciana subsp. incompta John Thomas Howell 1941-8-1 16663 Madera Near Garnet Lake 2956 Comment
  CAS-BOT-BC90753  Artemisia ludoviciana subsp. incompta John Thomas Howell; Gordon H. True 1970-7-28 47024 Tulare East side of Big Meadow on loop road south of North Manter Pass Trail, Kern Plateau 2377 Comment
  CAS-BOT-BC90755  Artemisia ludoviciana subsp. incompta John Thomas Howell; Gordon H. True 1967-9-19 43830 Tulare Flood-plain of Kern River South Fork, Kennedy Meadows Campground, Kern Plateau 1859 Comment
  CAS-BOT-BC93672  Artemisia pycnocephala John Thomas Howell 1927-3-18 2287 San Francisco Summit of Lone Mountain, San Francisco 121 Comment
  CAS-BOT-BC97138  Artemisia rothrockii John Thomas Howell 1945-9-24 21497 Tuolumne Soda Springs, Tuolumne Meadows Comment
  CAS-BOT-BC97283  Artemisia tridentata subsp. parishii John Thomas Howell 1950-11-9 27484 Los Angeles 3 miles S.W. of Newhall Comment
  CAS-BOT-BC97440  Artemisia tridentata subsp. tridentata John Thomas Howell 1958-5-22 33150 Tulare Kern River Canyon 6 miles south of Roads End P.O. 944 Comment
  CAS-BOT-BC97448  Artemisia tridentata subsp. tridentata John Thomas Howell 1942-8-5 17710 Tulare Between Big Arroyo and Chagoopa Plateau Comment
  CAS-BOT-BC99288  Artemisia tridentata subsp. vaseyana John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-8-10 54432 Amador Small lake on Carson Pass Road just west of Carson Spur near Kirkwood - Sierra Nevada 2407 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-BC65858  Aspidotis carlotta-halliae John Thomas Howell 1967-3-5 42037 Marin near Rattlesnake Camp, Mt. Tamalpais 335 Comment
  CAS-BOT-BC99227  Aster John Thomas Howell 1963-8-22 40279 Alpine Sierra Nevada - Monitor Pass 2529 Comment
  RSA44439  Aster ascendens J. T. Howell 1947-8-16 24144 Inyo Big Pine Lakes Trail. 2805 Comment
  RSA14945  Aster lentus J. T. Howell 1934-9-23 12571 Solano Suisun Marshes at Benecia [Benicia] Junction Comment
Read comments
Sep 26 2006
  CAS-BOT-BC180487  Astragalus bolanderi John Thomas Howell 1942-7-27 17290 Tulare Deer Creek between timber Gap and Cliff Creek Comment
  CAS-BOT-BC178662  Astragalus claranus John Thomas Howell 1931-4-19 6431 Sonoma Grassy meadow, 12.5 miles from St. Helena on Spring Mountain Road to Santa Rosa Comment
  CAS-BOT-BC182660  Astragalus douglasii John Thomas Howell 1933-4-22 11077 San Benito Near San Benito Comment
  CAS-BOT-BC182863  Astragalus douglasii John Thomas Howell 1957-4-29 32072 Monterey Sandy flood plain of Salinas River, King City Comment
  NY674272  Astragalus gibbsii J. T. Howell 1974-7-10 50515 Lassen Sagebrush flat at the cemetery, Janesville 1295 Comment
  CAS-BOT-BC187083  Astragalus lentiginosus var. antonius John Thomas Howell 1947-7-18 23406 Los Angeles Blue Ridge, San Gabriel Mts. 2590 Comment
  UC421664  Astragalus lentiginosus var. coachellae John Thomas Howell 1928-3-11 3439 Riverside 6 mi se Garnet Station (Colorado Desert); , se of Garnet Station Comment
  CAS-BOT-BC187233  Astragalus lentiginosus var. ineptus John Thomas Howell 1963-7-10 39726 Alpine 0.5 mile west of Monitor Pass 2529 Comment
  CAS-BOT-BC187242  Astragalus lentiginosus var. ineptus John Thomas Howell 1947-8-6 23829 Inyo Above Summit Lake, Big Pine Lakes 3413 Comment
  CAS-BOT-BC187301  Astragalus lentiginosus var. kernensis John Thomas Howell 1950-7-12 26756 Tulare North end of Monache Meadows 2438 Comment
  GH366327  Astragalus lentiginosus var. kernensis J. T. Howell & G. H. True 1967-7-4 42972 Unknown Troy Meadow, Kern Plateau 2377 Comment
  CAS-BOT-BC178116  Astragalus lentiginosus var. nigricalycis John Thomas Howell 1931-3-20 5889 Kern 3 miles N of Devil's Den at Kings-Kern county line. Comment
  CAS-BOT-BC27683  Astragalus monoensis John Thomas Howell 1938-8-10 14500 Mono Near Crestview Comment
  UC1177235  Astragalus nuttallii var. virgatus John Thomas Howell 1947-5-14 23159 Marin McClure Beach Comment
  UCD105253  Astragalus purshii var. tinctus John Thomas Howell 1962-5-22 37272 Tulare Kern River Canyon above Roads End, Sierra Nevada. 1097 Comment
  UCR88856  Astragalus sepultipes J. T. Howell 1958-5-24 33315 Inyo Sierra Nevada Mtns., Whitney Portal road 1982 Comment
  RSA0006889  Astragalus whitneyi J. T. Howell 1947-8-11 23998 Inyo South end of Coyote Ridge. 3659 Comment
  CAS-BOT-BC53681  Athyrium filix-femina var. californicum John Thomas Howell 1958-7-28 34041 Fresno Sierra Nevada - Between Blue Canyon and Tehipite Valley, Middle Fork of the Kings River 1341 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
  CAS-BOT-BC170194  Atriplex canescens subsp. canescens John Thomas Howell 1927-7-29 2874 Orange In hills on n. side of Santa Ana Canyon. 152 Comment
  CAS-BOT-BC168576  Atriplex cordulata John Thomas Howell; Gordon H. True 1967-7-6 43234 Tulare About 4 1/2 miles east-northeast of Pixley 83 Comment
  UC517437  Atriplex fruticulosa John Thomas Howell 1926-5-22 1988 Merced 5 mi sw Merced (Merced Plains); , sw of Merced Comment
  OBI17317  Atriplex fruticulosa John Thomas Howell 1948-6-14 24341 San Luis Obispo N end of Carrizo Plain headwater of Bitterwater crk Comment
  CAS-BOT-BC170261  Atriplex hymenelytra John Thomas Howell 1928-1-28 3289 Riverside Thousand Palms, Colorado Desert Comment
  POM203147  Atriplex leucophylla J. T. Howell 1933-10-8 11706 Marin Pt. Reyes Peninsula Comment
  CAS-BOT-BC168463  Atriplex parishii var. subtilis John Thomas Howell 1967-11-4 44075 Tulare SE. corner. About 4.5 miles east-northeast of Pixley 83 Comment
  UCD97665  Atriplex rosea John Thomas Howell; Gordon H. True 1967-8-8 43594 Tulare about 5 miles west of Chimney Meadow, Kern Plateau. 2346 Comment
  UCD97666  Atriplex rosea John Thomas Howell 1969-9-12 46087 El Dorado near Camino. 975 Comment
  CAS-BOT-BC176800  Atriplex spinifera John Thomas Howell 1931-3-19 5860 Fresno Near Coalinga Comment
  CAS-BOT-BC146163  Avena fatua John Thomas Howell 1954-5-16 s.n. El Dorado Sierra Nevada. 4 miles west of Shingle Springs. Comment
  CAS-BOT-BC98614  Baccharis pilularis John Thomas Howell; Gordon H. True 1972-6-29 48926 Contra Costa Near Byron Hot Springs (site) Comment
  CAS-BOT-BC99601  Baccharis pilularis John Thomas Howell 1981-10-14 54648 Sutter Dean Ranch, Sutter Buttes Comment
  CAS-BOT-BC98206  Baccharis salicifolia John Thomas Howell 1956-12-4 32002 Mariposa Merced River Canyon 1 mile below South Fork confluence. Comment
  CAS-BOT-BC99727  Baccharis salicifolia John Thomas Howell 1976-5-19 51771 Kern Between Isabella Dam and Keysville, Greenhorn Mountains 822 Comment
  RSA797  Baileya pleniradiata J. T. Howell 1927-8-1 538 San Bernardino Warren's Well, Mojave Desert 915 Comment
  RSA798  Baileya pleniradiata J. T. Howell 1927-7-9 299 San Bernardino Near Box S Ranch, Mojave Desert. 915 Comment
  CAS-BOT-BC106458  Balsamorhiza hookeri John Thomas Howell 1962-6-18 37788 Plumas Sierra Valley near Beckwourth - Sierra Nevada 1487 Comment
  CAS-BOT-BC106475  Balsamorhiza sagittata John Thomas Howell; Gordon H. True 1967-5-29 42332 Tulare Sierra Nevada, Kern Plateau - west side of Chimney Meadow 1889 Comment
  POM204439  Bassia hyssopifolia J. T. Howell 1933-7-20 11444 San Joaquin Bottom lands along San Joaquin River near Tracy. Comment
  RSA790  Bebbia juncea J. T. Howell 1927-6-2 13 Orange Sandstone Ridge, Botany Garden, RSA. 152 Comment
  UCD56778  Beckmannia syzigachne John Thomas Howell 1962-6-18 37747 Plumas Plants of the Sierra Nevada. Sierra Valley near Beckwourth. 1487 Comment
  CAS-BOT-BC100188  Bellis perennis John Thomas Howell 1957-5-26 32443 San Francisco North base of Lone Mt. Comment
  CAS-BOT-BC54222  Berberis aquifolium var. repens John Thomas Howell 1934-6-11 11981 Modoc Parker Creek, Warner Mts. 1584 Comment
  CAS-BOT-BC413092  Bistorta bistortoides John Thomas Howell 1943-8-5 19062 Glenn Plaskett Meadows 1828 Comment
  CAS-BOT-BC27856  Blennosperma nanum var. robustum John Thomas Howell 1947-5-14 23153 Marin Pt. Reyes Peninsula above McClure Beach Comment
  POM204103  Blepharipappus scaber J. T. Howell 1934-6-10 11894 Lassen Horse Lake Comment
  CAS-BOT-BC127887  Blepharizonia laxa John Thomas Howell 1954-11-2 30118 Kern Carneros Canyon, Temblor Range Comment
  CAS-BOT-BC16219  Boechera John Thomas Howell 1949-8-8 26157 Tulare Saddle between Rock and Crabtree Creeks. 3931 Comment
  CAS-BOT-BC15791  Boechera acutina John Thomas Howell 1937-7-23 13373 Siskiyou South Fork of Salmon River near Big Flat. 1524 Comment
  CAS-BOT-BC15854  Boechera arcuata John Thomas Howell 1930-5-13 5026 Kern Kern Canyon 7 miles above Kernville. Comment
  CAS-BOT-BC16295  Boechera howellii John Thomas Howell 1941-7-22 16386 Fresno Fresno - Inyo Counties. Mono Pass. 3657 Comment
  CAS-BOT-BC14081  Boechera pauciflora John Thomas Howell 1960-7-19 35637 Plumas Lassen Volcanic National Park. Drakesbad. 1828 Comment
  CAS-BOT-BC95735  Boechera pauciflora John Thomas Howell 1934-6-13 12102 Modoc North fork of Barber Creek, Warner Mts. 1828 Comment
  CAS-BOT-BC14129  Boechera peirsonii John Thomas Howell 1947-7-25 23656 San Bernardino San Bernardino Mountains. Whitewater Cirque. Mount San Gorgonio. 3352 Comment
  CAS-BOT-BC14144  Boechera pendulocarpa John Thomas Howell 1946-7-15 22368 Inyo Rock Creek Lake Basin. Mosquito Flat. 3139 Comment
  CAS-BOT-BC14324  Boechera platysperma John Thomas Howell 1958-7-24 33878 Fresno Sierra Nevada. Simpson Meadow. Middle Fork of the Kings River. 1828 Comment
  CAS-BOT-BC14434  Boechera platysperma John Thomas Howell 1950-7-22 27167 Tulare Olancha Peak. 2895 Comment
  CAS-BOT-BC14712  Boechera repanda John Thomas Howell; Gordon H. True 1973-8-1 50218 Lassen Sierra Nevada. Headwaters of Baxter Creek, east slope of Diamond Range, south of Susanville. 2164 Comment
  GH378865  Boechera repanda J. T. Howell & G. H. True 1966-7-13 41953 Unknown Pipe Spring on Cherry Hill Road, west side of Big Meadow, Kern Plateau 2377 Comment
  CAS-BOT-BC25384  Boechera retrofracta John Thomas Howell 1940-8-1 15785 Tulare Between Reflection Lake and Harrison Pass. Comment
  CAS-BOT-BC25516  Boechera retrofracta John Thomas Howell 1941-7-31 16582 Madera Agnew Pass. Comment
  CAS-BOT-BC25545  Boechera retrofracta John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-8-12 54514 Mono Sierra Nevada. Rock Creek road to Rock Creek Lake Basin. 2849 Comment
  CAS-BOT-BC25633  Boechera retrofracta John Thomas Howell 1960-7-21 27164 Tulare Monache Mountain. 2590 Comment
  CAS-BOT-BC25635  Boechera retrofracta John Thomas Howell 1951-7-19 27949 Tulare Mineral King and Vicinity. Monarch Lakes Trail. 2438 Comment
  CAS-BOT-BC25818  Boechera stricta John Thomas Howell 1941-7-31 16551 Madera Agnew Pass Trail. Comment
  CAS-BOT-BC25900  Boechera suffrutescens John Thomas Howell 1934-7-10 12537 Lassen Between Harvey Valley and Patterson Flats. Comment
  CAS-BOT-BC25908  Boechera suffrutescens John Thomas Howell 1961-6-20 36546 Shasta Lassen Volcanic National Park. Anklin Meadows. 1874 Comment
  CDA23855  Boerhavia coccinea J. T. Howell 1977-3-1 52319 San Diego Colorado Desert; Borrego Springs. Comment
  CAS-BOT-BC434507  Boerhavia diffusa John Thomas Howell; R. C. Barneby 1954-5-9 29311 Fresno At Piedra 170 Comment
  POM259052  Boisduvalia glabella J. T. Howell 1938-5-28 13836 Merced Between Volta and Gustine. Comment
  CAS-BOT-BC28214  Bolboschoenus fluviatilis John Thomas Howell 1961-9-25 36942 Plumas Feather River bed, Portola. 1478 Comment
  CAS-BOT-BC31011  Bolboschoenus maritimus John Thomas Howell 1927-6-30 2618 Orange Alkaline coastal plain 7 miles E of Long Beach. 15 Comment
  CAS-BOT-BC95359  Bowlesia incana John Thomas Howell 1957-4-27 32046 Monterey 11 miles SE of Carmel Valley 335 Comment
  CAS-BOT-BC417605  Boykinia major John Thomas Howell 1923-7-24 146 Mariposa bed of Merced River at the Indian Bridge, Wawona 1219 Comment
  POM196466  Boykinia occidentalis John T. Howell 1927-8-18 3014 Monterey Arroyo Seco River, Santa Lucia Camp, Santa Lucia Mtns. 610 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-BC30323  Brassica nigra John Thomas Howell 1946-6-29 s.n. San Francisco San Francisco. Golden Gate Park. Comment
  CAS-BOT-BC30325  Brassica nigra John Thomas Howell 1957-6-16 32627 San Francisco San Francisco. Embarcadero at Vallejo Street. Comment
  CAS-BOT-BC36601  Brassica nigra John Thomas Howell 1957-6-16 32646 San Francisco San Francisco. Third and Davidson Street. Comment
  CAS-BOT-BC36731  Brassica rapa John Thomas Howell 1954-5-16 29618 a El Dorado Sierra Nevada. Shingle Springs. 426 Comment
  CAS-BOT-BC36780  Brassica rapa John Thomas Howell 1956-5-12 31370 San Francisco San Francisco. Marin Street near Third Street. Comment
  CAS-BOT-BC36840  Brassica tournefortii John Thomas Howell 1977-3-10 52322 San Diego Colorado Desert. Borrego Springs. 182 Comment
  CAS-BOT-BC484157  Brodiaea elegans var. elegans John Thomas Howell 1958-8-17 34590 Madera Granite Creek Campground 2133 Comment
  CAS-BOT-BC484260  Brodiaea elegans var. elegans John Thomas Howell; Gordon H. True 1971-5-26 47638 Placer Northern limits of Lincoln 48 Comment
  CAS-BOT-BC486549  Brodiaea terrestris subsp. kernensis John Thomas Howell 1963-6-22 39572 Monterey Priest Valley 685 Comment
  CAS-BOT-BC144152  Bromus arenarius John Thomas Howell 1958-8-2 34222 Fresno Sierra Nevada. On zigzags of Copper Creek Canyon Trail. 1981 Comment
  CAS-BOT-BC144218  Bromus arenarius John Thomas Howell 1963-6-22 39593 Monterey Parkfield Summit. 1066 Comment
  CAS-BOT-BC149401  Bromus berteroanus John Thomas Howell 1957-4-29 32106 Monterey Summit of Mustang Grade. 822 Comment
  CAS-BOT-BC148934  Bromus carinatus var. carinatus John Thomas Howell 1957-5-26 32418 San Francisco North base of Lone Mountain. Comment
  CAS-BOT-BC149180  Bromus carinatus var. carinatus John Thomas Howell 1938-6-19 13912 Marin Cacade Canyon, Mill Valley. Comment
  CAS-BOT-BC149221  Bromus carinatus var. carinatus John Thomas Howell 1944-6-4 19544 Marin Inverness Ridge west of Inverness. Comment
  CAS-BOT-BC149317  Bromus carinatus var. carinatus John Thomas Howell; Gordon H. True 1967-7-11 43360 Plumas Sierra Nevada. Southeast slope of Mount Hough. 2042 Comment
  UC1177018  Bromus carinatus var. carinatus John Thomas Howell 1947-5-8 23141 Marin Sausalito Comment
  CAS-BOT-BC148822  Bromus carinatus var. marginatus John Thomas Howell; Gordon H. True 1966-7-11 41694 Tulare Sierra Nevada. Kern Plateau. Poison Meadow. 2286 Comment
  CAS-BOT-BC148898  Bromus carinatus var. marginatus John Thomas Howell 1962-7-10 38483 Kern Sierra Nevada. Greenhorn Mountains. Shirley Meadows. 2011 Comment
  UCD59081  Bromus carinatus var. marginatus John Thomas Howell; Gordon H. True 1967-5-29 42381 Tulare Kern Plateau. Sierra Nevada. Near north end of Lamont Meadow on road to Chimney Meadow. 1859 Comment
  CAS-BOT-BC156184  Bromus catharticus John Thomas Howell 1964-6-29 40783 San Luis Obispo Cambria. Comment
  CAS-BOT-BC156211  Bromus catharticus John Thomas Howell 1953-5-8 28955 Monterey Carmel. Comment
  SBBG115911  Bromus catharticus J. T. Howell 1958-5-29 33612 Inyo Bishop 1264 Comment
  CAS-BOT-BC155924  Bromus ciliatus John Thomas Howell 1944-8-11 20318 Tuolumne Tuolumne Meadows. Comment
  CAS-BOT-BC155760  Bromus diandrus John Thomas Howell 1957-5-17 32276 San Francisco San Francisco. Bayview Hills. Comment
  UCD59297  Bromus diandrus John Thomas Howell 1961-6-21 36670 Plumas Sierra Nevada. Greenville. 1097 Comment
  CAS-BOT-BC155516  Bromus hallii John Thomas Howell 1942-8-5 17675 Tulare Between Big Arroyo and Chagoopa Plateau. 3048 Comment
  CAS-BOT-BC155538  Bromus hallii John Thomas Howell; Gordon H. True 1966-7-12 41851 Kern Sierra Nevada. Kern Plateau. On road to Bartolas Country east of Little Cannell Meadow. 2194 Comment
  CAS-BOT-BC155037  Bromus hordeaceus John Thomas Howell 1963-5-18 39267 Monterey 2.5 miles south of Aromas. 60 Comment
  CAS-BOT-BC155220  Bromus hordeaceus John Thomas Howell; T. C. Fuller; G. D. Barbe 1980-5-21 53574 Siskiyou Yreka. 822 Comment
  RSA118067  Bromus hordeaceus J. T. Howell 1955-5-19 30199 Monterey Avila Ranch, Santa Lucia Mountains, west of King City. 457 Comment
  CAS-BOT-BC155346  Bromus japonicus John Thomas Howell 1977-6-24 52417 Plumas Sierra Nevada. Near confluence of Spanish and Indian Creeks. 929 Comment
  CAS-BOT-BC162428  Bromus laevipes John Thomas Howell; R. C. Barneby 1954-5-12 29461 Mariposa Sierra Nevada. Trail to Hites Cove. 609 Comment
  CAS-BOT-BC162349  Bromus madritensis John Thomas Howell 1962-7-8 38325 Kern Sierra Nevada. Greenhorn Mountains. 1.5 mile southast of Summit. 1524 Comment
  RSA223389  Bromus marginatus J. T. Howell 1963-5-18 39302 Monterey 2.5 miles south of Aromas. 61 Comment
  CAS-BOT-BC162242  Bromus maritimus John Thomas Howell 1957-9-1 32923 San Francisco San Francisco. Sutro Heights above Point Lobos. Comment
  CAS-BOT-BC162253  Bromus maritimus John Thomas Howell 1945-6-12 20958 Marin Point Reyes Peninsula. Near Radio Station. Comment
  CAS-BOT-BC161941  Bromus rubens John Thomas Howell 1960-6-6 35341 Fresno Sierra Nevada. Copper Creek Trail, Kings Canyon. 1676 Comment
  CAS-BOT-BC161584  Bromus sterilis John Thomas Howell 1949-4-6 25305 Sonoma Along road southwest of Sonoma. Comment
  CAS-BOT-BC161419  Bromus tectorum John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49199 Lassen Sierra Nevada. Elysian Valley, northwest of Janesville. 1325 Comment
  CAS-BOT-BC185382  Bromus vulgaris John Thomas Howell 1937-7-23 13364 Siskiyou South Fork of Salmon River near Big Flat. 1524 Comment
  RSA224262  Bryonia dioica J. T. Howell 1957-6-21 32691 a San Francisco Golden Gate Park, near Stow Lake, San Francisco Comment
  JEPS30760  Cakile maritima John Thomas Howell 1943-10-3 19333 Marin just above high tide line Muir Beach Comment
  UC710607  Cakile maritima John Thomas Howell 1943-10-3 19333 Marin Muir Beach Comment
  CDA62  Cakile maritima J. T. Howell 1943-10-3 19333 Marin Muir Beach. Comment
  CAS-BOT-BC185348  Calamagrostis canadensis John Thomas Howell 1960-7-20 35722 Plumas Lassen Volcanic National Park. 1828 Comment
  CAS-BOT-BC185241  Calamagrostis koelerioides John Thomas Howell 1943-8-10 19270 Glenn Black Butte. Comment
  CAS-BOT-BC185173  Calamagrostis nutkaensis John Thomas Howell 1943-5-30 18194 Marin Azalea Flat, Mount Tamalpais. Comment
  GH341578  Calamagrostis nutkaensis J. T. Howell 1943-5-30 18194 Unknown Azalea Flat, Mt. Tamalpais Comment
  CAS-BOT-BC185059  Calamagrostis purpurascens John Thomas Howell 1949-8-9 26189 Tulare Cirque Peak. 3733 Comment
  UCD57713  Calamagrostis purpurascens John Thomas Howell 1942-7-31 17472 Tulare Mt. Kaweah. Comment
  CAS-BOT-BC438439  Calandrinia ciliata John Thomas Howell 1964-4-28 40572 Mariposa Just south of Morman Bar on road to Ben Hur 548 Comment
  CAS-BOT-BC438484  Calandrinia ciliata John Thomas Howell; H. Keith Wagnon 1980-5-27 53631 Plumas About 1.5 miles northwest of Almanor (near intersection of Highway 89 and Humboldt Road) 1389 Comment
  GH356724  Calocedrus decurrens J. T. Howell 1962-9-22 38781 Unknown Cooks Peak, Greenhorn Mts. 2072 Comment
  CAS-BOT-BC132249  Calochortus John Thomas Howell; T. C. Fuller; G. D. Barbe 1980-7-1 53762 Tulare Kern Plateau, upper part of Brush Creek Canyon on Cherry Hill Road 1767 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-BC490178  Calochortus leichtlinii J. T. Howell 1965-8-24 2533 A Nevada Sand Ridge, 2 1/2 miles north east of Grouse Ridge Lookout 2255 Comment
  CAS-BOT-BC492612  Calochortus monophyllus John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-5-17 52954 Calaveras Glencoe 822 Comment
  CAS-BOT-BC494066  Calochortus venustus John Thomas Howell 1930-5-13 5055 Kern Rocky wash, Kern Canyon, 7miles above Kernville 844 Comment
  CAS-BOT-BC273445  Calycadenia mollis John Thomas Howell 1938-5-29 13854 Madera Raymond 289 Comment
  SEINET7379698 Image available Calycadenia multiglandulosa subsp. bicolor J. T. Howell 1976-8-1 52046 El Dorado Sierra Nevada, Serpentine hills, Cameron Park about 3 miles west of Shingle Springs 427 Comment
  CAS-BOT-BC106084  Calycadenia oppositifolia John Thomas Howell 1955-6-15 30509 Butte West Branch of North Fork of Feather River 182 Comment
  CAS-BOT-BC275439  Calycadenia truncata subsp. microcephala John Thomas Howell 1945-6-19 21034 Lake Sawmill Flat, Bartlett Mountain 1219 Comment
  CAS-BOT-BC32308  Calystegia collina subsp. oxyphylla John Thomas Howell 1945-6-18 20985 Lake Near Glenbrook Comment
  CAS-BOT-BC436406  Calystegia subacaulis John Thomas Howell 1946-5-25 21935 Marin Greenbrae HIlls Comment
  CAS-BOT-BC218884  Camissonia John Thomas Howell; Gordon H. True 1969-5-13 45622 Kern Open brushy slope, Spanish Needle Creek road to Lamont Meadow 1280 Comment
  RSA2595  Camissonia bistorta J. T. Howell 1928-7-9 1059 Riverside Temescal Canyon, 6 miles south of Glen Ivy 335 Comment
  RSA504  Camissonia bistorta J. T. Howell 1928-4-7 898 Orange Bee Canyon, Rancho Santa Ana 152 Comment
  RSA506  Camissonia boothii subsp. desertorum J. T. Howell 1927-6-12 122 San Bernardino Mojave Desert. Deadman s Point 915 Comment
  POM181149  Camissonia graciliflora J. T. Howell 1931-3-22 5956 Monterey Stone Canyon. Comment
  JEPS33689  Camissoniopsis bistorta John Thomas Howell 1928-3-20 3456 Los Angeles Vermont Canyon Los Angeles, Griffith Park Comment
  CAS-BOT-BC37207  Capsella bursa-pastoris John Thomas Howell; Gordon H. True 1968-5-14 44355 Tulare Sierra Nevada. Kern Plateau. Cherry Hill Road at Rincon Trail, Brush Creek Canyon. 1463 Comment
  CAS-BOT-BC37272  Cardamine breweri John Thomas Howell 1958-7-23 33798 Fresno Sierra Nevada. Middle Fork of the Kings River. Simpson Meadow. 1828 Comment
  CAS-BOT-BC37448  Cardamine californica John Thomas Howell 1960-3-26 35198 Kern Sierra Nevada. Near Delonegha Hot Springs. Kern River Canyon. Comment
  CAS-BOT-BC37980  Cardamine oligosperma John Thomas Howell 1964-6-30 40876 San Luis Obispo Cambria. Comment
  CAS-BOT-BC37834  Cardamine oligosperma John Thomas Howell; Gordon H. True 1978-4-4 52745 Amador Sierra Nevada. Near Boston House on road to Wallace. Comment
  CAS-BOT-BC384782  Cardionema ramosissimum John Thomas Howell 1964-4-18 40431 Monterey Robinson Canyon, Santa Lucia Mts. Comment
  CAS-BOT-BC281749  Carduus pycnocephalus John Thomas Howell 1956-5-19 31407 San Francisco Near Third and Army Streets, San Francisco Comment
  UC750591  Carduus pycnocephalus subsp. pycnocephalus J. Thomas Howell 1946-5-4 21754 Marin near Burdell (along Redwood Highway); Redwood Highway Comment
  POM215025  Carduus tenuiflorus J. T. Howell 1930-6-15 5298 Alameda Berkeley Hills Comment
  CAS-BOT-BC18219  Carex John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-6-25 53000 Calaveras Sierra Nevada. Dorrington. 1463 Comment
  CAS-BOT-BC18284  Carex John Thomas Howell 1962-7-10 38445 Kern Sierra Nevada. Greenhorn Mountains, 1.5 miles south of Summit. 1950 Comment
  CAS-BOT-BC18295  Carex John Thomas Howell 1972-4-25 48711 Mariposa Sierra Nevada. Yosemite Valley. Bank of Merced River opposite Bridal Veil Falls. 1219 Comment
  CAS-BOT-BC18521  Carex abrupta John Thomas Howell 1946-7-14 22329 Inyo Rock Creek Lake Basin. Mosquito Flat. 3139 Comment
  CAS-BOT-BC20330  Carex abrupta John Thomas Howell 1950-7-14 26862 Tulare Sierra Nevda. South Fork of Kern River. Bakeoven Meadows. 2468 Comment
  CAS-BOT-BC17790  Carex amplifolia John Thomas Howell 1943-8-9 19221 Glenn Plaskett Meadows. 1828 Comment
  CAS-BOT-BC17984  Carex aquatilis John Thomas Howell 1947-8-13 24055 Inyo Big Pine Creek Trail. 2895 Comment
  CAS-BOT-BC18998  Carex athrostachya John Thomas Howell 1942-7-25 17147 Tulare Mineral King. Comment
  CAS-BOT-BC19045  Carex athrostachya John Thomas Howell 1938-8-12 14552 Tuolumne Tuolumne Meadows. Comment
  CAS-BOT-BC19682  Carex athrostachya John Thomas Howell 1946-6-13 22025 Marin Chileno Valley. Comment
  SEINET7550699 Image available Carex athrostachya John Thomas Howell 1934-6-12 12030 Modoc Plum Valley, Warner Mts. Comment
  CAS-BOT-BC19140  Carex aurea John Thomas Howell 1949-7-26 25780 Tulare Sierra Nevada. Whitney Meadows. 2956 Comment
  RSA201275  Carex aurea J. T. Howell 1960-7-18 35508 Plumas Drakesbad 1677 Comment
  CAS-BOT-BC19566  Carex bolanderi John Thomas Howell 1930-7-27 5390 Sonoma 1 mile north of Fort Ross. Comment
  CAS-BOT-BC19465  Carex bolanderi John Thomas Howell; R. C. Barneby 1954-5-12 29467 Mariposa Sierra Nevada. Trail to Hite Cove. 609 Comment
  UCD140156  Carex bolanderi John Thomas Howell 1960-6-17 35491 Placer Lassen Volcanic National Park, Drakesbad. 1676 Comment
  CAS-BOT-BC19610  Carex brainerdii John Thomas Howell 1944-7-15 19799 Glenn Canyon of Snow Basin Creek. Comment
  SEINET13344652  Carex brainerdii J. T. Howell, Gordon H. True 1967-5-7 42186 Plumas Sierra Nevada, Injin Jim Campground [now James Lee Campground] at confluence of Granite Creek and North Fork of Feather River 610 Comment
  CAS-BOT-BC19675  Carex brainerdii John Thomas Howell 1954-6-5 29933 Tuolumne Sierra Nevada. Near Strawberry on old road to Sonora Pass. Comment
  CAS-BOT-BC34051  Carex brevicaulis John Thomas Howell 1952-3-4 28298 Monterey Just south of Little Sur. Comment
  CAS-BOT-BC34148  Carex breweri John Thomas Howell 1944-8-10 20288 Mono Dana Plateau. Comment
  CAS-BOT-BC34164  Carex breweri John Thomas Howell 1940-8-1 15830 Tulare Between Reflection Lake and Harrison Pass. Comment
  CAS-BOT-BC34250  Carex capitata John Thomas Howell 1947-8-15 24122 Inyo Big Pine Lakes. Fifth Lake. 3352 Comment
  CAS-BOT-BC34258  Carex capitata John Thomas Howell 1942-8-5 17724 Tulare Chagoopa Plateau. Kaweah Meadows. Comment
  CAS-BOT-BC34295  Carex congdonii John Thomas Howell 1946-7-24 22692 Fresno Mono Mesa above Gold Lake. Comment
  CAS-BOT-BC34342  Carex congdonii John Thomas Howell 1942-7-28 17334 Tulare Between Pinto Lake and Black Rock Pass. Comment
  CAS-BOT-BC34369  Carex congdonii John Thomas Howell 1944-8-13 20439 Tuolumne Between Dog Lake and Tuolumne Meadows. Comment
  RSA51983  Carex congdonii J. T. Howell 1949-8-8 26153 Tulare Above Sky Blue Lake. 3659 Comment
  RSA0000209  Carex danaensis J. T. Howell 1938-8-11 14546 Tuolumne Mt. Dana. 3811 Comment
  CAS-BOT-BC34430  Carex davyi John Thomas Howell 1946-8-31 22954 El Dorado Northeast of Gilmore Lake. 2682 Comment
  CAS-BOT-BC34463  Carex deflexa var. boottii John Thomas Howell 1940-8-9 16085 Fresno Bullfrog Lake. Comment
  CAS-BOT-BC34465  Carex deflexa var. boottii John Thomas Howell 1946-7-22 22662 Fresno Pioneer Basin. 3291 Comment
  CAS-BOT-BC34844  Carex deflexa var. boottii John Thomas Howell 1947-8-7 23878 Inyo Big Pines Lakes. West of Sixth Lake. 3413 Comment
  CAS-BOT-BC18979  Carex densa John Thomas Howell 1947-6-26 23298 Sonoma Cunningham Marsh. Comment
  CAS-BOT-BC34833  Carex densa John Thomas Howell 1945-6-20 21125 Lake Bartlett Mountain. Between Pinnacle Rock and Low Gap. Comment
  CAS-BOT-BC35007  Carex densa John Thomas Howell 1946-5-4 21729 Marin Near Dillon Beach. Comment
  CAS-BOT-BC35026  Carex densa John Thomas Howell 1946-6-2 s.n. Marin Mt. Tamalpais. Potrero Meadow. Comment
  CAS-BOT-BC34835  Carex densa John Thomas Howell 1943-5-11 18024 Lake 1 mile north of Kelseyville. Comment
  RSA216167  Carex densa J. T. Howell 1966-4-30 41523 Marin John Thomas Howell Botanical Garden, Tiburon. Comment
  CAS-BOT-BC20588  Carex douglasii John Thomas Howell 1947-8-16 24147 Inyo Big Pine Lakes Trail. 2804 Comment
  CAS-BOT-BC20071  Carex echinata John Thomas Howell 1958-8-2 34173 Fresno Sierra Nevada. Copper Creek Canyon. Tent Meadow (lower). 2316 Comment
  RSA52257  Carex echinata subsp. echinata J. T. Howell 1946-9-1 22962 El Dorado Echo Summit. 2256 Comment
  CAS-BOT-BC19955  Carex exsiccata John Thomas Howell 1946-6-13 22032 Marin Chileno Valley. Comment
  CAS-BOT-BC19979  Carex feta John Thomas Howell 1974-7-10 50557 Lassen Sierra Nevada. Elysian Valley. 1325 Comment
  GH274469  Carex feta J. T. Howell 1944-8-18 20706 Unknown Tuolumne Big Trees Comment
  CAS-BOT-BC20270  Carex filifolia var. erostrata John Thomas Howell 1944-8-10 20224 Mono North slope of Mount Dana. Comment
  CAS-BOT-BC20278  Carex filifolia var. erostrata John Thomas Howell 1940-8-1 15807 Tulare Between Reflection Lake and Harrison Pass. Comment
  CAS-BOT-BC34002  Carex filifolia var. filifolia John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49194 Lassen Sierra Nevada. Elysian Valley northwest of Janesville. 1325 Comment
  RSA98034  Carex fissuricola J. T. Howell 1951-7-18 27920 Tulare West side, Franklin Pass, Mineral King and vicinity. 3354 Comment
  CAS-BOT-BC21303  Carex fracta John Thomas Howell; Gordon H. True 1973-7-31 50047 Lassen Sierra Nevada. On road from Janesville to Thompson Peak, Diamond Range. 1783 Comment
  CAS-BOT-BC21305  Carex fracta John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49451 Lassen Sierra Nevada. Elysian Valley, west of Janesville. 1325 Comment
  SD130382  Carex fracta John Thomas Howell 1963-7-12 39864 El Dorado Sierra Nevada; Transition Zone forest; 3 miles sothwest of Twin Bridges on road to Kyburz. 1676 Comment
  CAS-BOT-BC20698  Carex fracta John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-22 54114 Plumas Sierra Nevada. 10.6 miles northeast of La Porte on road to Quincy. 1889 Comment
  CAS-BOT-BC20886  Carex globosa John Thomas Howell 1933-4-30 11193 Marin North side of Mt. Tamalpais. Comment
  SEINET7559870 Image available Carex globosa John Thomas Howell 1942-4-19 16946 Marin Carson Ridge, Mt Tamalpais. Comment
  RSA52314  Carex harfordii J. T. Howell 1949-5-25 25335 Marin Point Reyes Peninsula. Comment
  CAS-BOT-BC21795  Carex hassei John Thomas Howell 1950-7-19 27089 Tulare North end of Hessian Meadows. 2590 Comment
  CAS-BOT-BC22299  Carex hassei John Thomas Howell 1961-6-20 36577 Tehama Bluff Falls. 1981 Comment
  CAS-BOT-BC21002  Carex helleri John Thomas Howell 1949-7-20 25550 Tulare Sierra Nevada. Sky Blue Lake. 3505 Comment
  CAS-BOT-BC22215  Carex helleri John Thomas Howell 1947-8-11 24016 Inyo South end of Coyote Ridge. 3657 Comment
  CAS-BOT-BC21979  Carex heteroneura John Thomas Howell 1947-7-22 23514 San Bernardino South Fork, Santa Ana River. San Bernardino Mountains. 2377 Comment
  CAS-BOT-BC22071  Carex heteroneura John Thomas Howell 1944-8-5 19953 Tuolumne Tuolumne Meadows. Near Parsons Lodge. Comment
  CAS-BOT-BC146667  Carex hirtissima John Thomas Howell 1945-6-20 21126 Lake Between Pinnacle Rock and Low Gap, Bartlett Mountain Comment
  POM248614  Carex hirtissima J. T. Howell, Alice Eastwood 1938-5-17 5681 Lake Elk Mountain Ranger Station Comment
  CAS-BOT-BC28142  Carex hoodii John Thomas Howell 1946-7-14 22321 Inyo Mosquito Flat, Rock Creek Lake Basin. 3139 Comment
  SEINET12879853 Image available Carex illota J. T. Howell 1938-1 14577 Unknown Comment
  CAS-BOT-BC35511  Carex jonesii John Thomas Howell 1947-7-22 23501 San Bernardino South Fork, Santa Ana River, San Bernardino Mountains 2377 Comment
  CAS-BOT-BC35532  Carex jonesii John Thomas Howell 1941-7-31 16571 Madera Agnew Pass Trail Comment
  UCD140487  Carex laeviculmis John Thomas Howell; Gordon H. True 1970-5-27 46532 El Dorado Blodgett Experimental Forest. 1280 Comment
  HSC7137  Carex lanuginosa J. T. Howell, J. W. Stacey 1937-6-6 13041 Sonoma Pitkin Marsh. Comment
  CAS-BOT-BC31171  Carex lemmonii John Thomas Howell 1957-6-13 32621 Sonoma Pitkin Marsh. Comment
  CAS-BOT-BC31196  Carex lemmonii John Thomas Howell; Gordon H. True 1970-7-30 47182 Tulare SW end of Big Meadow just E of Cherry Hill Road. Kern Plateau. 2377 Comment
  CAS-BOT-BC28541  Carex lenticularis var. impressa John Thomas Howell 1942-8-1 17561 Tulare Moraine Lake. Comment
  CAS-BOT-BC28432  Carex lenticularis var. lipocarpa John Thomas Howell 1937-7-22 13255 Siskiyou South Fork of Salmon River near Big Flat. 1524 Comment
  CAS-BOT-BC31408  Carex leporinella John Thomas Howell 1941-8-5 16768 Madera Near Garnet Lake. 2956 Comment
  CAS-BOT-BC31803  Carex microptera John Thomas Howell 1949-7-26 25791 Tulare Golden Trout Creek. 2941 Comment
  CAS-BOT-BC31805  Carex microptera John Thomas Howell 1942-8-1 17545 Tulare Sky Parlor Meadow. Chagoopa Plateau. Comment
  CAS-BOT-BC31915  Carex microptera John Thomas Howell 1948-7-25 25002 Fresno Bubbs Creek Canyon in vicinity of Vidette Meadows 3048 Comment
  CAS-BOT-BC32022  Carex multicaulis John Thomas Howell; T. C. Fuller; G. D. Barbe 1980-5-20 53502 Trinity Ca 6 mi SW of Trinity Center on road to Weaverville. 883 Comment
  CAS-BOT-BC119986  Carex multicostata John Thomas Howell 1951-7-20 27992 Tulare Farewell Gap Trail. 2895 Comment
  CAS-BOT-BC23422  Carex multicostata John Thomas Howell 1937-7-21 13199 Siskiyou South Fork of Salmon River near Big Flat 1524 Comment
  CAS-BOT-BC32253  Carex multicostata John Thomas Howell 1946-7-14 22317 Inyo Mosquito Flat, Rock Creek Lake Basin. 3139 Comment
  CAS-BOT-BC32255  Carex multicostata John Thomas Howell 1947-8-9 23952 A Inyo Seventh Lake, Big Pine Lakes. 3413 Comment
  CAS-BOT-BC119699  Carex nervina John Thomas Howell 1941-7-31 16563 Madera Agnew Pass Trail. Comment
  CAS-BOT-BC119621  Carex nigricans John Thomas Howell 1949-7-20 25554 Tulare Sky Blue Lake 3505 Comment
  CAS-BOT-BC119652  Carex nigricans John Thomas Howell 1949-7-24 25716 Tulare Above Primrose Lake. 3566 Comment
  UC904989  Carex nigricans John Thomas Howell 1949-7-20 25554 Tulare Sky Blue Lake Sierra Nevada 3505 Comment
  RSA0014632  Carex orestera J. T. Howell 1949-8-5 26031 Tulare Army Pass. 3506 Comment
  CAS-BOT-BC119289  Carex ovalis John Thomas Howell 1938-7-3 13965 Sonoma Pitkin Marsh Comment
  CAS-BOT-BC118932  Carex pellita John Thomas Howell 1952-6-15 28359 Siskiyou Swamp, 2 mi W of Montague. Comment
  CAS-BOT-BC118943  Carex pellita John Thomas Howell 1945-8-14 21410 Sonoma Perry marsh. Comment
  CAS-BOT-BC119084  Carex phaeocephala John Thomas Howell 1947-8-5 23770 Inyo Fifth Lake, Big Pine Lakes. 3352 Comment
  CAS-BOT-BC119092  Carex phaeocephala John Thomas Howell 1946-7-24 22701 Inyo Mono Mesa 3657 Comment
  SEINET10713299  Carex phaeocephala John Thomas Howell 1942-8-7 Howell 17815 A Tulare Columbine Lake. Comment
  CAS-BOT-BC118853  Carex praeceptorum John Thomas Howell 1949-7-31 25961 Tulare Rock Creek 3200 Comment
  CAS-BOT-BC118582  Carex praegracilis John Thomas Howell; T. C. Fuller; G. D. Barbe 1980-7-15 53775 Tulare Pipe Spring, W side of Big Meadow, Kern Plateau 2377 Comment
  CAS-BOT-BC118741  Carex preslii John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49469 Lassen Elysian Valley, west of Janesville 1325 Comment
  CAS-BOT-BC118709  Carex proposita John Thomas Howell 1942-7-29 17403 Tulare Little Five Lakes Basin. Comment
  CAS-BOT-BC117971  Carex rossii John Thomas Howell 1944-7-14 19782 Glenn Plaskett Meadows. Comment
  CAS-BOT-BC117980  Carex rossii John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-6-28 53169 Alpine West base of Ebbetts Peak. 2743 Comment
  SEINET958236  Carex rossii John Thomas Howell 1949-1 22698 Inyo Mono Mesa. 3658 Comment
  RSA0079914  Carex rossii John Thomas Howell 1944-8-17 20682 Tuolumne Tuolumne Meadows. Comment
  SEINET8125521 Image available Carex rossii J. T. Howell 1944-1 19782 Unknown Comment
  SEINET958238  Carex rossii J. T. Howell 1946-1 22323 Inyo Mesquito Flat. Rock Creek Lake Basin. 3139 Comment
Read comments
May 28 2015
  CAS-BOT-BC117869  Carex sartwelliana John Thomas Howell 1958-7-25 33906 Fresno Simpson Meadow, Middle fork of the Kings River. 1828 Comment
  CAS-BOT-BC117918  Carex scabriuscula John Thomas Howell 1936-8-24 12725 Trinity Scott Mountain summit N of Carrville. Comment
  CAS-BOT-BC118263  Carex scopulorum var. bracteosa John Thomas Howell; Gordon H. True 1968-7-18 4441 Mono Basin at N end of Saddlebag Lake, head of Lee Vining Creek. 3048 Comment
  CAS-BOT-BC118278  Carex scopulorum var. bracteosa John Thomas Howell 1949-7-19 25490 Tulare Rock Creek 3200 Comment
  CAS-BOT-BC118296  Carex scopulorum var. bracteosa John Thomas Howell 1944-8-6 20040 Tuolumne Dog Lake Comment
  CAS-BOT-BC28317  Carex scopulorum var. bracteosa John Thomas Howell 1946-7-23 22677 Fresno Fourth Recess 3048 Comment
  CAS-BOT-BC28252  Carex scopulorum var. bracteosa John Thomas Howell 1943-7-24 18753 Nevada Horse Range Valley Comment
  CAS-BOT-BC117424  Carex senta John Thomas Howell; R. C. Barneby 1954-5-11 29401 Madera Peckimpah Creek. 914 Comment
  CAS-BOT-BC117561  Carex serratodens John Thomas Howell 1945-6-19 21019 Lake Sawmill Flat, Bartlett Mountain 1219 Comment
  CAS-BOT-BC117694  Carex simulata John Thomas Howell 1951-8-21 28252 Sierra 5 miles from Calpine on road to Blairsen. 1524 Comment
  CAS-BOT-BC117135  Carex spectabilis John Thomas Howell 1947-8-7 23874 Inyo Big Pine Lakes, West of Sixth Lake. 3413 Comment
  CAS-BOT-BC117228  Carex spectabilis John Thomas Howell 1944-8-7 20068 Tuolumne Tuolumne Meadows. Comment
  SEINET7575712 Image available Carex spectabilis John Thomas Howell 1939-8-8 15189 Siskiyou Black Mt, Marble Mts. Comment
  CAS-BOT-BC116947  Carex straminiformis John Thomas Howell 1944-8-16 20662 Mono Mono Pass Comment
  CAS-BOT-BC116968  Carex straminiformis John Thomas Howell 1942-7-28 17355 Tulare East side Black Rock Pass. Comment
  SEINET8149037 Image available Carex straminiformis J. T. Howell 1943-1 18795 Unknown Comment
  UCD140872  Carex subbracteata John Thomas Howell 1957-5-17 32269 San Francisco Bayview Hills. Comment
  RSA201415  Carex subbracteata J. T. Howell 1957-5-28 32516 Unknown Northwest side of Lone Mt. San Francisco. Comment
Read comments
Jun 10 2012
  RSA88836  Carex subbracteata J. T. Howell 1938-5-1 13783 San Mateo Near South San Francisco. Comment
  SEINET7577065 Image available Carex subbracteata John Thomas Howell 1938-5-1 13778 San Mateo Near South San Francisco. Comment
  CAS-BOT-BC116780  Carex subbracteata var. subbracteata John Thomas Howell 1947-6-5 23238 Sonoma Cunningham Marsh. Comment
  CAS-BOT-BC114994  Carex subfusca John Thomas Howell 1962-6-18 37752 Plumas Sierra Valley near Beckwourth. 1487 Comment
  CAS-BOT-BC115746  Carex subfusca John Thomas Howell 1944-8-14 20483 Tuolumne Tuolumne Canyon above Glen Aulin Comment
  CAS-BOT-BC115769  Carex subfusca John Thomas Howell 1942-7-27 17295 Tulare Deer Creek between Timber Gap and Cliff Creek. Comment
  CAS-BOT-BC115926  Carex subfusca John Thomas Howell 1947-7-25 23676 San Bernardino San Bernardino Mountains. Mt. San Gorgonio 3505 Comment
  CAS-BOT-BC116596  Carex subfusca John Thomas Howell 1938-8-13 14576 Mariposa Snow Flat Comment
  CAS-BOT-BC116639  Carex subfusca John Thomas Howell; Gordon H. True 1991-7-15 48607 Kern Bartolas Spring on North Fork of Bartolas Creek. 2133 Comment
  RSA118057  Carex subfusca J. T. Howell 1955-7-8 30629 Monterey Santa Lucia Camp, Arroyo Seco River. 610 Comment
  UC710440  Carex subfusca John Thomas Howell 1943-7-14 18299 Nevada near Norden (w side of Donner Pass) 2133 Comment
  CAS-BOT-BC115774  Carex subfusca John Thomas Howell; Gordon H. True 1970-7-27 46921 Tulare Forest Border of Big Meadow, on the E side at Joughin Camp 2377 Comment
  RSA97965  Carex subfusca J. T. Howell 1951-6-27 27600 Plumas McRae Meadow. 1982 Comment
  CAS-BOT-BC9361  Carex subnigricans John Thomas Howell 1944-8-7 20054 Tuolumne Tuolumne Meadows Comment
  CAS-BOT-BC9375  Carex subnigricans John Thomas Howell 1949-7-19 25505 Tulare Rock Creek 3200 Comment
  CAS-BOT-BC115693  Carex tompkinsii John Thomas Howell 1960-6-6 35372 Fresno 1/2 mi E of Boyden Cave, Kings Canyon. 975 Comment
  UC1147790  Carex tumulicola John Thomas Howell 1937-5-23 13011 San Francisco Presidio San Francisco Comment
  CAS-BOT-BC115409  Carex utriculata John Thomas Howell 1951-6-27 27605 Plumas McRae Meadow. 1981 Comment
  CAS-BOT-BC115258  Carex vernacula John Thomas Howell 1944-8-15 20560 Tuolumne Mt. Conness 3657 Comment
  CAS-BOT-BC115275  Carex vernacula John Thomas Howell 1949-7-25 25728 Tulare Siberian Pass Creek. 3352 Comment
  CAS-BOT-BC115033  Carex vesicaria John Thomas Howell; Gordon H. True 1970-6-26 46886 Tulare Dry Lake on Cherry Hill Road S of Big Meadow. 2346 Comment
  SEINET4410122 Image available Carpenteria californica J. T. Howell 1954-1 11429 Unknown Comment
  RSA44183  Cassiope mertensiana subsp. californica J. T. Howell 1947-8-7 23854 Inyo West of Sixth Lake, Big Pine Lakes. 3415 Comment
  RSA128028  Castilleja applegatei subsp. martinii J. T. Howell 1957-4-29 32094 Monterey Just east of summit of Mustang Grade. Topotype. 793 Comment
  CAS-BOT-BC249579  Castilleja applegatei subsp. pinetorum John Thomas Howell; Gordon H. True 1971-7-15 48594 Kern Near end of Cherry Hill Road at Bartolas Creek, Kern Plateau 2103 Comment
  RSA88399  Castilleja applegatei subsp. pinetorum J. T. Howell 1951-6-28 27715 Plumas Eureka Peak. 2195 Comment
  CAS-BOT-BC255509  Castilleja applegatei var. pinetorum John Thomas Howell 1958-7-24 33879 Fresno Simpson Meadow, Middle Fork of the Kings River, Sierra Nevada 1828 Comment
  POM180790  Castilleja foliolosa J. T. Howell 1930-7-20 5383 Marin Mt. Tamalpais on se. side along Wheeler Trail. Comment
  CAS-BOT-BC243839  Castilleja latifolia John Thomas Howell 1933-4-9 10964 San Mateo Granada Comment
  CAS-BOT-BC243859  Castilleja latifolia John Thomas Howell 1930-7-27 5401 Sonoma 1 mile north of Fort Ross Comment
  CAS-BOT-BC32615  Castilleja latifolia subsp. insularis John Thomas Howell 1931-4-11 6251 Santa Barbara Santa Cruz Island. Valle del Medio Comment
  RSA437  Castilleja linariifolia J. T. Howell 1927-8-1 550 San Bernardino Morongo Valley. 915 Comment
  RSA46749  Castilleja linariifolia J. T. Howell 1934-6-10 11885 Lassen 12 miles N of Susanville, on road to Horse Lake. Comment
  JEPS58953  Castilleja minor subsp. spiralis John Thomas Howell 1947-6-15 23249 Marin near Bootjack cypresses; Mt. Tamalpais Comment
  POM180613  Castilleja wightii J. T. Howell 1930-6-8 5281 Sonoma 8.5 miles north of Bodega Bay. Comment
  JEPS27096  Caulanthus amplexicaulis John Thomas Howell 1927-7-10 2766 San Bernardino below Big Bear Lake; San Bernardino Mts., below Big Bear Lake 1828 Comment
  RSA66820  Caulanthus cooperi J. T. Howell 1930-5-13 4952 Kern Red Rock Canyon Comment
  CAS-BOT-BC41050  Caulanthus flavescens John Thomas Howell 1931-3-29 6023 San Benito 11 miles from Hernandez on road to San Benito. Comment
  CAS-BOT-BC40530  Caulanthus lasiophyllus John Thomas Howell 1928-4-1 3626 Inyo Black Mountain. 2 miles east of Bradbury Well. Comment
  A425727  Ceanothus J. T. Howell 1935-5-5 12621 Unknown 6 miles from Santa Rosa on road to Sonoma Comment
  RSA21914  Ceanothus confusus J. T. Howell 1935-5-5 12618 Sonoma 6 miles from Santa Rosa on road to Sonoma. Comment
  CAS-BOT-BC48708  Ceanothus cordulatus John Thomas Howell 1945-9-30 21545 El Dorado Near Echo Summit Comment
  CAS-BOT-BC49174  Ceanothus cuneatus John Thomas Howell; Gordon H. True 1969-5-14 45724 Tulare Sierra Nevada - Kern Plateau, Cherry Hill Road at start of Rincon Trail 1463 Comment
  RSA99620  Ceanothus cuneatus J. T. Howell 1954-3-18 29132 Monterey Hastings Reservation, Santa Lucia Mts. Comment
  CAS-BOT-BC49786  Ceanothus divergens John Thomas Howell 1941-4-5 16167 Napa About 1 mi. sw. of Calistoga Comment
  CAS-BOT-BC49815  Ceanothus diversifolius John Thomas Howell; Gordon H. True 1970-6-22 46597 Kern 1.5 milest west of summit on road from Kernville to Glennville 1584 Comment
  CAS-BOT-BC50948  Ceanothus foliosus var. foliosus John Thomas Howell 1930-12-28 5717 Marin Slope of Mt. Tamalpais above Mill Valley Comment
  CAS-BOT-BC64328  Ceanothus gloriosus subsp. exaltatus John Thomas Howell 1944-4-2 19361 Marin Bolinas Ridge. Comment
  A349355  Ceanothus gloriosus var. exaltatus J. T. Howell 1931-3-14 5781 Unknown Vine Hill District, 10 miles west of Santa Rosa Comment
  RSA97029  Ceanothus gloriosus var. exaltatus J. T. Howell 1954-4-24 29149 Mendocino 6 miles north of Willits Comment
  CAS-BOT-BC49987  Ceanothus gloriosus var. porrectus John Thomas Howell 1944-6-4 19535 Marin Inverness Ridge Comment
  A349677  Ceanothus jepsonii J. T. Howell 1933-4-2 10959 Unknown 2 miles east of Occidental Comment
  CAS-BOT-BC50587  Ceanothus lemmonii John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-22 54071 Yuba Sierra Nevada - 1/4 miles southwest of Bullards Bar Dam on road to Challenge 609 Comment
  CAS-BOT-BC51147  Ceanothus lemmonii John Thomas Howell 1975-6-15 51115 Butte Paradise, Skyway near Billie Road 609 Comment
  CAS-BOT-BC63519  Ceanothus oliganthus var. sorediatus John Thomas Howell 1930-4-17 4716 Alameda Strawberry Canyon, Berkeley Hills. Comment
  CAS-BOT-BC53225  Ceanothus parryi John Thomas Howell 1931-4-2 6057 Napa Wooden Valley Grade 4.5 miles east of Napa Comment
  CAS-BOT-BC126812  Ceanothus pauciflorus John Thomas Howell; Gordon H. True 1967-7-5 43162 Tulare 4.5 miles north of South Fork Kern River bridge on road to Troy Meadow, Kern Plateau 2286 Comment
  A425132  Ceanothus prostratus J. T. Howell 1937-7-25 13494 Unknown Stuarts Fork of Trinity River 1981 Comment
  CAS-BOT-BC52198  Ceanothus purpureus John Thomas Howell 1937-7-4 13062 Napa Wooden Valley Grade Comment
  RSA19010  Ceanothus purpureus J. T. Howell 1937-7-4 s.n. Napa Wooden Valley Grade Comment
  CAS-BOT-BC53036  Ceanothus sonomensis John Thomas Howell 1935-5-5 12609 Sonoma Slopes of Triniti Mt., 2 miles ne. of Glen Ellen Comment
  A425288  Ceanothus sorediatus J. T. Howell 1928-3-2 3369 Unknown Los Angeles, Canon bottom, Vermont Canon, Griffith Park Comment
  CAS-BOT-BC52406  Ceanothus velutinus var. velutinus John Thomas Howell 1964-8-10 40939 Alpine about 0.5 miles southwest of Monitor Pass 2514 Comment
  CAS-BOT-BC52454  Ceanothus velutinus var. velutinus John Thomas Howell 1969-9-14 46210 Mono Leavitt Meadow 2194 Comment
  CAS-BOT-BC281958  Centaurea benedicta John Thomas Howell 1956-3-20 31120 San Bernardino Mission Blvd at Grove St, Ontario Comment
  CAS-BOT-BC272147  Centaurea cineraria John Thomas Howell 1943-5-23 18159 Alameda Hills above Mills College Comment
  CAS-BOT-BC272084  Centaurea cyanus John Thomas Howell 1959-9-24 34978 Plumas Sierra Valley near Beckworth, Sierra Nevada 1493 Comment
  JEPS33683  Centaurium muehlenbergii John Thomas Howell 1926-6-13 2021 Stanislaus Knight's Ferry 121 Comment
  LA203698  Centromadia pungens John Thomas Howell; 1930-10-5 5533 Solano just N of Grizzly Island Comment
  CAS-BOT-BC279586  Centromadia pungens subsp. pungens John Thomas Howell; Gordon H. True 1969-5-12 45597 Kern Isabella 762 Comment
  CAS-BOT-BC279321  Centromadia pungens subsp. pungens John Thomas Howell 1956-9-19 31877 San Mateo 2.3 miles s. of Lake Merced on Skyline Blvd. Comment
  CAS-BOT-BC388194  Cerastium fontanum John Thomas Howell 1959-9-22 34841 Plumas Drakesbad 1737 Comment
  CDA3348  Cerastium glomeratum J. T. Howell 1964-6-3 40887 San Luis Obispo Cambria. 0 Comment
  RSA223599  Ceratophyllum demersum J. T. Howell 1963-8-6 40025 Monterey Abbott Lakes, Arroyo Seco Forest Service Campground. Comment
  CAS-BOT-BC135422  Cercocarpus betuloides var. betuloides John Thomas Howell 1937-7-4 13074 Sonoma Near Petrified Forest Comment
  CAS-BOT-BC136957  Cercocarpus ledifolius var. intricatus John Thomas Howell 1928-6-14 3926 Inyo S. side of Surprise [Canon] Canyon near Panamint City, Panamint Mts. 2438 Comment
  CAS-BOT-BC279433  Chaenactis John Thomas Howell; R. C. Barneby 1954-5-10 29382 Madera Between North Fork and Bass Lake 914 Comment
  CAS-BOT-BC279488  Chaenactis alpigena John Thomas Howell 1938-8-9 14460 Madera Devil's Postpile Comment
  CAS-BOT-BC279506  Chaenactis artemisiifolia John Thomas Howell 1928-4-22 3752 Ventura At. Pt. Mugu Comment
  CAS-BOT-BC276493  Chaenactis douglasii var. douglasii John Thomas Howell 1943-8-8 19192 Unknown Anthony Peak, Tehama - Mendocino Counties Comment
  CAS-BOT-BC277796  Chaenactis santolinoides John Thomas Howell 1962-7-11 38559 Kern Nevada slope of Black Mountain. Greenhorn Mountains 2133 Comment
  CAS-BOT-BC284306  Chaenactis stevioides John Thomas Howell 1958-5-25 33354 Inyo Carroll Creek, Sierra Nevada 1676 Comment
  CAS-BOT-BC279667  Chaenactis xantiana John Thomas Howell 1950-7-26 27351 Tulare Summit Meadow Comment
  CAS-BOT-BC140765  Chamaebatia foliolosa John Thomas Howell 1977-8-1 52424 Calaveras Dorrington 1463 Comment
  A345151  Chamaebatiaria millefolium J. T. Howell 1938-8-7 14338 Unknown Crooked Creek 2057 Comment
  UC473464  Chamaesyce serpillifolia subsp. hirtula John Thomas Howell 1930-10-24 5651 Monterey 5.2 mi E of The Indians; Santa Lucia Mountains Comment
  CAS-BOT-BC68254  Cheilanthes gracillima John Thomas Howell; Gordon H. True 1970-5-27 46564 El Dorado Sierra Nevada - Rubicon River Canyon, near waterfall, N-NE of Leonardi Spring 1127 Comment
  CAS-BOT-BC68129  Cheilanthes intertexta John Thomas Howell; Gordon H. True 1967-7-5 43169 Tulare Sierra Nevada, Kern Plateau - 2.8 miles north of South Fork Kern River bridge on road to Troy Meadow 2194 Comment
  CAS-BOT-BC68135  Cheilanthes intertexta John Thomas Howell 1953-5-24 29009 Tuolumne between Pinecrest and Cow Creek 1737 Comment
  RSA88305  Cheilanthes intertexta J. T. Howell 1953-5-24 29009 Tuolumne Around rocks between Pinecrest and Cow Creek 1738 Comment
  RSA201508  Chenopodium atrovirens J. T. Howell, Gordon True Jr. 1967-8-8 43504 Tulare Lamont Meadow; Kern Plateau. 1677 Comment
  CAS-BOT-BC460995  Chenopodium atrovirens John Thomas Howell 1949-7-30 25939 Tulare The Tunnel 2712 Comment
  CAS-BOT-BC133240  Chlorogalum purpureum var. purpureum John Thomas Howell 1957-6-2 32553 Monterey Jolon Comment
  CAS-BOT-BC191831  Chorizanthe clevelandii John Thomas Howell 1955-7-8 30650 Monterey Hanging Valley, Santa Lucia Mountains 838 Comment
  CAS-BOT-BC191860  Chorizanthe corrugata John Thomas Howell 1928-3-24 3497 San Diego near Palow Wash, W Colorado Desert Comment
  CAS-BOT-BC191559  Chorizanthe cuspidata var. cuspidata John Thomas Howell 1933-7-9 11430 San Francisco Lake Merced Comment
  CAS-BOT-BC191539  Chorizanthe cuspidata var. villosa John Thomas Howell 1939-6-4 14716 Marin Pt. Reyes Lighthouse Comment
  GH369847  Chorizanthe cuspidata var. villosa J. T. Howell 1946-7-4 22176 Unknown Dillons Beach Comment
  RSA127051  Chorizanthe cuspidata var. villosa J. T. Howell 1946-6-9 s.n. Marin Abbott's Lagoon Comment
  CAS-BOT-BC256993  Chorizanthe membranacea John Thomas Howell 1930-5-13 5035 Kern Kern Canyon, 7 miles above Kernville 844 Comment
  UC1176924  Chorizanthe polygonoides var. polygonoides John Thomas Howell 1941-5-25 16229 Marin between Potrero Meadow and Mount Theater (Mount Tamalpais); Mt. Tamalpais, btwn Potrero Meadow and Mt. Theater Comment
  CAS-BOT-BC32830  Chorizanthe staticoides var. staticoides J. T. Howell 1928-6-10 3876 Los Angeles San Gabriel Mts., Monrovia Canyon, near Deer Park Comment
  GH369966  Chorizanthe valida J. T. Howell, C. Best, W. Follette & G. H. True 1980-6-19 53718 Unknown near Abbotts Lagoon, Point Reyes Peninsula Comment
Read comments
Jun 20 2017
  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-BC248020  Chorizanthe watsonii John Thomas Howell; Gordon H. True 1971-6-16 47919 Kern 6 miles east of Claraville on road to Kelso Valley 1676 Comment
  UCD100054  Chorizanthe watsonii John Thomas Howell 1962-5-22 37384 Tulare 1.5 mile east of Johnsondale. 1371 Comment
  RSA65272  Chorizanthe wheeleri J. T. Howell 1931-4-12 6300 Santa Barbara Santa Cruz Island. Cochie Canyon. Comment
  CAS-BOT-BC255363  Chorizanthe xanti var. xanti John Thomas Howell 1957-6-25 32765 Kern Tehachapi Mts., 2.5 miles se. of Keene 914 Comment
  RSA54048  Chrysanthemum leucanthemum J. T. Howell 1949-7-4 25356 San Mateo Skyline Blvd., north of Millbrae Comment
  CAS-BOT-BC36362  Chrysolepis sempervirens John Thomas Howell 1958-8-13 34370 Madera Near Isberg Lake 2987 Comment
  RSA201258  Chrysothamnus parryi subsp. latior J. T. Howell 1960-8-22 36414 Shasta 1/2 mile W of park line on road Viola. Comment
  CAS-BOT-BC100817  Chrysothamnus viscidiflorus subsp. viscidiflorus John Thomas Howell 1961-9-25 36959 Plumas Portola 1478 Comment
  JEPS75246  Chrysothamnus viscidiflorus subsp. viscidiflorus John Thomas Howell 1963-8-22 40286 Alpine near Monitor Pass 2529 Comment
  UCD130466  Chrysothamnus viscidiflorus subsp. viscidiflorus John Thomas Howell; Gordon H. True 1967-9-18 43743 Tulare Kern Plateau, Chimney Meadow. 1889 Comment
  POM248719  Cicuta bolanderi J. T. Howell 1938-7-17 13975 Solano Suisun Marshes at Benecia Junction Comment
  CAS-BOT-BC190006  Cinna latifolia John Thomas Howell 1939-8-10 15252 Siskiyou Marble Mountains. Sky High Valley. 1828 Comment
  CAS-BOT-BC105806  Cirsium andrewsii John Thomas Howell 1957-10-5 32985 San Francisco Fort Point, Presidio, San Francisco Comment
  CAS-BOT-BC105830  Cirsium andrewsii John Thomas Howell 1947-6-18 23275 Marin Dillons Beach Comment
  CAS-BOT-BC105850  Cirsium andrewsii John Thomas Howell 1958-6-3 33627 San Francisco Fort Point, San Francisco Comment
  CAS-BOT-BC284386  Cirsium arvense John Thomas Howell 1946-9-20 23022 Marin Petaluma Road east of Tomales Comment
  CAS-BOT-BC279956  Cirsium douglasii var. breweri John Thomas Howell 1960-7-24 35977 Plumas Lassen Volcanic National Park. Drakesbad 1828 Comment
  CAS-BOT-BC278096  Cirsium douglasii var. breweri John Thomas Howell 1931-8-26 8018 Nevada Floristan Comment
  UC1177292  Cirsium douglasii var. douglasii J. Thomas Howell 1947-6-18 23286 Marin n of Dillons Beach Comment
  CAS-BOT-BC100970  Cirsium hydrophilum var. vaseyi John Thomas Howell 1936-6-7 12657 Marin area near Bootjack, Mt. Tamalpais Comment
  CAS-BOT-BC280026  Cirsium mohavense John Thomas Howell 1928-6-20 4043 Inyo Jail Canyon near the Burro Mine, Panamint Mts. 1066 Comment
  CAS-BOT-BC280101  Cirsium occidentale var. californicum John Thomas Howell 1958-7-23 33807 Fresno Simpson Meadow, Middle Fork of the Kings River 1828 Comment
  CAS-BOT-BC285454  Cirsium occidentale var. californicum John Thomas Howell 1948-6-15 24360 San Luis Obispo Red Hills se. of Shandon Comment
  CAS-BOT-BC288005  Cirsium occidentale var. candidissimum John Thomas Howell 1952-6-15 28362 Siskiyou Knoll just east of Montague Comment
  CAS-BOT-BC286415  Cirsium occidentale var. venustum John Thomas Howell 1930-5-13 5046 Kern Kern Canyon, 7 miles above Kernville 844 Comment
  UC1177305  Cirsium occidentale var. venustum J. Thomas Howell 1946-5-14 21845 Marin along road between Rock Spring and Summit Meadow; Mt. Tamalpais Comment
  CAS-BOT-BC288686  Cirsium quercetorum John Thomas Howell 1939-6-4 14721 Marin Point Reyes lighthouse Comment
  POM261377  Cirsium quercetorum J. T. Howell 1939-6-18 14774 Marin Near Mud Lake Comment
  CAS-BOT-BC288734  Cirsium remotifolium John Thomas Howell 1941-6-8 16249 Marin Hills NE of San Raphael Comment
  CAS-BOT-BC288754  Cirsium remotifolium John Thomas Howell 1931-6-15 6702 Mendocino At Carl Purdy's place, Mayacama Mts, near Ukiah Comment
  CAS-BOT-BC286451  Cirsium scariosum John Thomas Howell 1960-7-24 35985 Plumas Lassen Volcanic National Park. Drakesbad 1828 Comment
  CAS-BOT-BC439069  Cistanthe monosperma John Thomas Howell 1942-7-31 17441 Tulare Mt. Kaweah Comment
  CAS-BOT-BC228942  Cistanthe umbellata John Thomas Howell 1961-6-20 36551 Shasta Lassen Volcanic National Park. Anklin Meadows 1874 Comment
  CAS-BOT-BC229066  Cistanthe umbellata John Thomas Howell; Gordon H. True 1969-10-1 46464 Tulare Taylor Creek south of Church Dome, Kern Plateau 2194 Comment
  CAS-BOT-BC223889  Cistus incanus John Thomas Howell 1941-6-10 16287 Marin At Black Point Comment
  CAS-BOT-BC162572  Clarkia affinis John Thomas Howell 1937-5-20 12969 San Benito 6 miles east of Paicines Comment
  UC1422874  Clarkia gracilis John Thomas Howell 1947-5-18 23173 Marin Fairfax Hills Comment
  CAS-BOT-BC164607  Clarkia gracilis subsp. gracilis John Thomas Howell 1943-5-22 18145 Marin Fairfax hills Comment
  CAS-BOT-BC163151  Clarkia imbricata John Thomas Howell 1937-7-4 13084 Sonoma 5 miles north of Sebastopol Comment
  CAS-BOT-BC172562  Clarkia purpurea subsp. purpurea John Thomas Howell 1974-7-10 50550 Lassen Elysian Valley, Sierra Nevada 1325 Comment
  CAS-BOT-BC164915  Clarkia rhomboidea John Thomas Howell; Gordon True; Walter Knight; Irja Knight 1967-7-10 2224 Plumas Trestle Glen Comment
  RSA0059931  Clarkia rubicunda J. T. Howell 1946-6-30 22131 Marin Valley east of Rodeo Lagoon. Comment
  CAS-BOT-BC439158  Claytonia exigua subsp. exigua John Thomas Howell 1925-3-22 848 Alameda Arroyo Mocho at ne. base of Cedar Mt. Comment
  CAS-BOT-BC439225  Claytonia exigua subsp. exigua John Thomas Howell 1946-3-24 21559 Marin Fairfax Hills Comment
  CAS-BOT-BC451731  Claytonia lanceolata John Thomas Howell 1940-5-31 15552 Mariposa El Capitan Trail Comment
  CAS-BOT-BC451751  Claytonia lanceolata John Thomas Howell 1961-6-20 36568 Shasta Lassen Volcanic National Park. South slope of Diamond Peak 2255 Comment
  CAS-BOT-BC233838  Claytonia parviflora subsp. parviflora John Thomas Howell 1933-5-21 11307 A Napa Hills east of Napa Comment
  CAS-BOT-BC439501  Claytonia parviflora subsp. parviflora John Thomas Howell 1931-4-4 6158 Lake St. Helena Creek Canyon, 4 miles south of Middletown Comment
  CAS-BOT-BC439708  Claytonia parviflora subsp. viridis John Thomas Howell 1963-5-5 39065 Monterey Mustang Grade, west of Priest Valley 670 Comment
  CAS-BOT-BC439724  Claytonia parviflora subsp. viridis John Thomas Howell; Gordon H. True 1967-5-29 42386 Tulare Slopes west of Lamont Meadow, Kern Plateau 1706 Comment
  CAS-BOT-BC439889  Claytonia perfoliata John Thomas Howell 1962-5-22 37376 Tulare 1.5 miles east of Johnsondale. 1371 Comment
  CAS-BOT-BC439823  Claytonia perfoliata John Thomas Howell 1969-4-22 45542 Amador Fiddletown. 518 Comment
  POM225662  Claytonia perfoliata J. T. Howell 1931-3-10 5755 Contra Costa East side of Mt. Diablo 7 miles from Clayton on Livermore road. Comment
  CAS-BOT-BC439951  Claytonia perfoliata subsp. mexicana John Thomas Howell 1964-6-30 40877 San Luis Obispo Cambria Comment
  CAS-BOT-BC440001  Claytonia perfoliata subsp. mexicana John Thomas Howell 1931-4-13 6318 Santa Barbara Santa Cruz Island near west end. Comment
  CAS-BOT-BC440070  Claytonia perfoliata subsp. perfoliata John Thomas Howell 1933-5-28 11356 Alameda Strawberry Canyon, Berkeley Hills Comment
  CAS-BOT-BC440081  Claytonia perfoliata subsp. perfoliata John Thomas Howell 1958-7-24 33871 Fresno Simpson Meadow, Middle Fork of the Kings River. 1828 Comment
  CAS-BOT-BC443689  Claytonia perfoliata subsp. perfoliata John Thomas Howell 1962-5-22 37281 Tulare Kern River Canyon above Roads End 1097 Comment
  CAS-BOT-BC92552  Clematis ligusticifolia John Thomas Howell 1923-7-30 177 Mariposa Stella Lake, Wawona. 1219 Comment
  RSA40154  Conicosia pugioniformis J. T. Howell 1943-10-30 19337 San Francisco East of Lake Merced 15 Comment
  RSA831  Conyza bonariensis J. T. Howell 1927-9-24 755 Orange Santa Ana Botany Garden 152 Comment
  RSA835  Conyza canadensis J. T. Howell 1927-9-24 743 Orange Santa Ana Botany Garden 152 Comment
  RSA220041  Conyza canadensis J. T. Howell 1956-8-19 31777 San Francisco Waterfront St. near Mission Rock Terminal, San Francisco. Comment
  CAS-BOT-BC288977  Conyza floribunda J. T. Howell 1976-11-25 52312 San Francisco Shotwell St between 25 and 26 Sts, San Francisco Comment
  NY68296  Cordylanthus nidularius J. T. Howell 1942-7-19 17044 Contra Costa Near of Deer Flat, Mt. Diablo. Comment
Read comments
Jul 18 2011
  RSA88133  Cordylanthus pilosus subsp. trifidus J. T. Howell 1951-6-26 27515 Butte Feather River Canyon. 213 Comment
  CAS-BOT-BC237963  Cordylanthus rigidus subsp. brevibracteatus John Thomas Howell 1962-7-11 38564 Kern Nw. slope of Black Mt., Greenhorn Mountains 2133 Comment
  UCR88755  Cordylanthus rigidus subsp. brevibracteatus J. T. Howell 1962-9-22 38768 Kern Greenhorn Mtns., 1.5 mi south of Summit 1951 Comment
  RSA8476  Cordylanthus rigidus subsp. rigidus J. T. Howell 1933-8-18 11573 Monterey 14 miles east of Jamesburg. Santa Lucia Mountains. Comment
  CAS-BOT-BC289004  Coreopsis bigelovii John Thomas Howell 1960-6-6 35393 Fresno Kings Canyon Rd 6.5 miles NE of Cherry Gap 1554 Comment
  CAS-BOT-BC287936  Coreopsis calliopsidea John Thomas Howell 1935-4-11 12598 Alameda Near Tesla Comment
  CAS-BOT-BC287089  Coreopsis douglasii John Thomas Howell 1930-5-12 4891 Los Angeles 2 miles N of Palmdale, Mojave Desert Comment
  CAS-BOT-BC101581  Corethrogyne filaginifolia John Thomas Howell; Gordon H. True 1969-9-30 46346 Tulare Cherry Hill Road 1 mile east of Kern Canyon highway, Brush Creek Canyon. Kern Plateau 1219 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
  A385554  Cornus stolonifera J. T. Howell 1943-8-11 19281 Unknown Canyon of Snow Basin Creek Comment
  CAS-BOT-BC427810  Crassula connata John Thomas Howell 1956-6-17 31583 San Francisco Summit ridge of Bayview Hills, San Francisco Comment
  CAS-BOT-BC427686  Crassula connata John Thomas Howell 1931-3-29 6005 San Benito Near the Pinnacles Comment
  CAS-BOT-BC291565  Crepis intermedia John Thomas Howell; Gordon H. True; Walter Knight; Irja Knight 1969-6-24 2424 Plumas Adjacent to the mouth of Butterfly Creek, Butterfly Botanical Area and vicinity 883 Comment
  CAS-BOT-BC376536  Crepis monticola John Thomas Howell 1943-8-4 19035 Glenn Summit ridge n. of Black Butte Comment
  UC703116  Crepis nana John Thomas Howell 1942-8-8 Tulare Farewell Gap Comment
  CAS-BOT-BC290731  Crepis occidentalis subsp. conjuncta John Thomas Howell 1943-7-18 18523 Nevada Castle Peak Comment
  CAS-BOT-BC290924  Crepis vesicaria John Thomas Howell 1956-5-1 31316 San Mateo Just s. of Woodside on road to Searsville Comment
  POM225536  Cressa truxillensis J. T. Howell 1932-9-2 10791 San Joaquin Holt. Comment
  CAS-BOT-BC190121  Crypsis schoenoides John Thomas Howell 1980-9-8 53895 Marin Desiccated bottom of Alpine Lake near Bon Tempe Lake dam. Comment
  CAS-BOT-BC190143  Crypsis schoenoides John Thomas Howell 1981-10-14 54629 Sutter South side of Sutter Buttes. Oak Hill Ranch. Comment
  CAS-BOT-BC190132  Crypsis vaginiflora John Thomas Howell 1980-9-8 53894 Marin Alpine Lake near Bon Tempe Lake Dam. Comment
  CAS-BOT-BC190152  Crypsis vaginiflora John Thomas Howell 1959-9-21 34814 Plumas Sierra Nevada. Indian Creek. Just below Indian Falls. 914 Comment
  CAS-BOT-BC177805  Cryptantha John Thomas Howell; T. C. Fuller; G. D. Barbe 1980-7-16 53814 Tulare Sherman Pass Road, 4.5 miles east of junction with Cherry Hill Road, Kern Plateau 2255 Comment
  UCD119040  Cryptantha affinis John Thomas Howell 1960-7-17 35487 Plumas Lassen Volcanic National Park, Drakesbad. 1676 Comment
  GH424680  Cryptantha circumscissa J. T. Howell 1949-8-9 26200 Unknown summit of Army Pass 3657 Comment
  CAS-BOT-BC218892  Cryptantha circumscissa subsp. rosulata John Thomas Howell 1949-7-27 25830 Tulare Whitney Meadows 2956 Comment
  CAS-BOT-BC189489  Cryptantha circumscissa var. circumscissa John Thomas Howell 1949-7-17 25409 Inyo Wonoga Peak 2895 Comment
  CAS-BOT-BC218817  Cryptantha glomeriflora John Thomas Howell; Gordon H. True 1967-5-29 42411 Tulare Kern Plateau, near north end of Long Valley in metamorphic area 2103 Comment
  CAS-BOT-BC218775  Cryptantha humilis John Thomas Howell 1943-7-26 18845 Placer Mt. Lincoln Comment
  RSA128035  Cryptantha rattanii J. T. Howell 1955-5-21 s.n. Monterey Hastings Reservation, Santa Lucia Mountains Comment
  CAS-BOT-BC80698  Cupressus macnabiana John Thomas Howell 1927-3-27 2294 Lake west of Middletown 762 Comment
  CAS-BOT-BC85478  Cupressus sargentii John Thomas Howell 1927-8-22 3040 Marin On rocky slope on Rock Spring Trail west of West Point, Mt. Tamalpais 548 Comment
  CAS-BOT-BC224508  Cuscuta californica John Thomas Howell 1942-6-21 16986 Marin Carson Ridge Comment
  CAS-BOT-BC224397  Cuscuta californica John Thomas Howell 1925-5-9 1010 Merced 3 miles sw. of Merced Comment
  CAS-BOT-BC224542  Cuscuta californica John Thomas Howell 1929-10-4 4434 Placer Four miles below Colfax on road to Auburn Comment
  SBBG41367  Cuscuta californica J. T. Howell 1944-9-3 Marin head of Cascade Cyn, Mt Tamalpais Comment
  UCD127344  Cyclospermum leptophyllum John Thomas Howell 1967-5-31 42546 Fresno Belmont and Parkway, Fresno. Comment
  CAS-BOT-BC190280  Cynodon dactylon John Thomas Howell 1956-11-4 s.n. San Francisco San Francisco. Waterfront. Comment
  CAS-BOT-BC114671  Cyperus eragrostis John Thomas Howell 1963-5-18 39266 Monterey Open hills, 2.5 mi S of Aromas. 60 Comment
  CAS-BOT-BC114532  Cyperus eragrostis John Thomas Howell 1954-6-21 30004 San Francisco in garden of Dr. E P Meinecke, 3157 Jackson st. Comment
  CAS-BOT-BC113876  Cyperus niger var. capitatus John Thomas Howell 1960-8-20 36275 Plumas Wet meadow, Drakesbad 1828 Comment
  UCD141103  Cyperus squarrosus John Thomas Howell 1962-7-7 38153 Kern Kern River Canyon. 304 Comment
  CAS-BOT-BC133742  Cypripedium californicum John Thomas Howell 1937-7-28 13610 Trinity Field redacted by CAS, contact the data manager for more information Comment
  UC750512  Cystopteris fragilis John Thomas Howell 1946-7-14 22301 Inyo Mosquito Flat; Rock Creek Lake Basin 3139 Comment
  UC421594  Damasonium californicum John Thomas Howell 1929-4-20 4172 Merced 2 mi. n.w. Merced (on Oakdale Rd.) Comment
  CAS-BOT-BC186633  Danthonia californica John Thomas Howell 1957-5-17 s.n. San Francisco Bayview Hills Comment
  CAS-BOT-BC189670  Danthonia californica John Thomas Howell 1973-7-10 49753 Plumas Sierra Nevada. Near Greenville. 1097 Comment
  CAS-BOT-BC194372  Danthonia unispicata John Thomas Howell 1946-7-28 22820 Inyo Gem Lake, Rock Creek Lake Basin 3352 Comment
  GH404748  Danthonia unispicata J. T. Howell 1944-7-14 19781 Unknown Plaskett Comment
  CAS-BOT-BC141804  Dasiphora fruticosa John Thomas Howell 1946-7-14 22273 Inyo Mosquito Flat, Rock Creek Lake Basin 3139 Comment
  CAS-BOT-BC141828  Dasiphora fruticosa John Thomas Howell 1944-8-16 20671 Mono Mono Pass Comment
  CAS-BOT-BC287377  Deinandra corymbosa John Thomas Howell 1943-5-23 18171 Alameda Hills above Mills College Comment
  CAS-BOT-BC293822  Deinandra fasciculata John Thomas Howell 1930-5-10 4789 Riverside 2 miles south of Perris 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
  CAS-BOT-BC291793  Deinandra lobbii John Thomas Howell 1930-10-11 5542 Alameda Livermore Valley 4 miles West of Livermore Comment
  CAS-BOT-BC291781  Deinandra lobbii John Thomas Howell 1934-7-5 12426 Shasta 4 miles nw. of Fall River Mills Comment
  CAS-BOT-BC179651  Delphinium John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-24 54261 Plumas About 2.5 miles southeast of Mt. Hough on the road to Quincy 1798 Comment
  CAS-BOT-BC8867  Delphinium glaucum John Thomas Howell 1925-7-2 1314 El Dorado Between Fallen Leaf Camp and Glen Alpine Lodge, Lake Tahoe region Comment
  CAS-BOT-BC8604  Delphinium hansenii John Thomas Howell; Barbara Menzies; Roberta Shockey 1978-5-17 52929 Calaveras Camanche Parkway South between Burson Road and Camanche Reservoir 152 Comment
  CAS-BOT-BC10109  Delphinium hesperium subsp. pallescens John Thomas Howell 1939-4-30 14622 Napa Near Walter Springs Comment
  CAS-BOT-BC9927  Delphinium nudicaule John Thomas Howell 1945-6-19 21042 Lake Sawmill Flat, Bartlett Mountain 1219 Comment
  CAS-BOT-BC121490  Delphinium parryi subsp. parryi John Thomas Howell 1931-4-11 6246 Santa Barbara Valle del Medio, Santa Cruz Island Comment
  CAS-BOT-BC121357  Delphinium parryi subsp. purpureum J. T. Howell 1927-7-10 2748 San Bernardino North side of Big Bear Lake, San Bernardino Mountains. 2042 Comment
  CAS-BOT-BC121566  Delphinium patens subsp. montanum John Thomas Howell 1962-7-10 38487 Kern Shirley Meadows, Greenhorn Mtns 2011 Comment
  CAS-BOT-BC121742  Delphinium patens subsp. patens John Thomas Howell 1951-6-27 27579 Plumas McRae Meadow 1981 Comment
  CAS-BOT-BC16793  Delphinium polycladon John Thomas Howell 1944-8-16 20580 Tuolumne Mono Pass Trail Comment
  CAS-BOT-BC192370  Deschampsia cespitosa subsp. cespitosa John Thomas Howell 1941-8-1 16657 Madera Near Garnet Lake 2956 Comment
  POM203128  Deschampsia cespitosa subsp. cespitosa J. T. Howell 1934-7-9 12517 Lassen Bridges Creek Spring. Comment
  CAS-BOT-BC209126  Deschampsia danthonioides John Thomas Howell 1956-6-10 31505 San Francisco North slope of Bay View Hills, San Francisco Comment
  RSA299161  Deschampsia danthonioides J. T. Howell, Gordon H. True 1970-6-26 46864 Tulare True Meadow; Kern Plateau 2226 Comment
  CAS-BOT-BC201759  Deschampsia elongata John Thomas Howell 1958-7-22 33773 Fresno Simpson Meadow, Middle Fork of the Kings River 1828 Comment
  CAS-BOT-BC42956  Descurainia incana John Thomas Howell; Gordon H. True 1970-7-28 47017 Tulare Sierra Nevada. Kern Plateau. West side of Big Meadow just south of Pipe Spring. 2377 Comment
  CAS-BOT-BC43112  Descurainia pinnata subsp. brachycarpa John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-6-27 53121 Alpine Sierra Nevada. Canyon of East Fork of Carson River on road to Wolf Creek Meadows. 1767 Comment
  CAS-BOT-BC43532  Descurainia sophia John Thomas Howell 1962-5-22 34351 Tulare Sierra Nevada. Johsondale. 1423 Comment
  CAS-BOT-BC254477  Dichanthelium acuminatum subsp. acuminatum John Thomas Howell 1937-6-6 13032 Sonoma Pitkin Marsh Comment
  RSA127246  Dichanthelium acuminatum var. fasciculatum J. T. Howell 1941-5-25 16225 Marin Potrero Meadow, Mt. Tamalpais Comment
  CAS-BOT-BC500091  Dichelostemma capitatum John Thomas Howell 1944-7-17 19831 Contra Costa Canyon of Snow Basin Creek Comment
  CAS-BOT-BC292196  Dicoria canescens John Thomas Howell 1928-11-4 4087 Riverside Below Palm Canon [Canyon] on road from Indio to Palm Springs Comment
  CAS-BOT-BC292259  Dieteria canescens John Thomas Howell 1974-7-8 50470 Lassen Susanville 1295 Comment
  CAS-BOT-BC299825  Dieteria canescens var. canescens John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-8-11 54482 Mono 4 miles northeast of Highway 395 on Benton Crossing Road, Long Valley, Sierra Nevada 2148 Comment
  CAS-BOT-BC209070  Digitaria sanguinalis John Thomas Howell 1963-8-5 39971 Monterey Along railroad tracks, King City. Comment
  CAS-BOT-BC150203  Diplacus John Thomas Howell 1967-6-22 42608 Butte Magalia 701 Comment
  CAS-BOT-BC150409  Diplacus aurantiacus John Thomas Howell 1956-6-10 31519 San Francisco North slope of Bay View Hills, San Francisco Comment
  CAS-BOT-BC152056  Diplacus calycinus John Thomas Howell 1960-6-6 35388 Fresno Kings Canyon Road, 4 miles west of Horseshoe Bend - Sierra Nevada 1036 Comment
  CAS-BOT-BC151878  Diplacus congdonii John Thomas Howell 1931-4-2 6071 Napa Wooden Valley Grade 5 miles east of Napa Comment
  CAS-BOT-BC151914  Diplacus douglasii John Thomas Howell 1925-3-23 868 Alameda Arroyo Mocho at ne base of Cedar Mt. Comment
  CAS-BOT-BC153410  Diplacus layneae John Thomas Howell 1940-5-19 15461 Napa Upper St. Helena Creek Comment
  CAS-BOT-BC153377  Diplacus layneae John Thomas Howell 1945-6-21 21196 Lake Bartlett Flat Comment
  CAS-BOT-BC151417  Diplacus mephiticus John Thomas Howell 1950-7-18 27067 Tulare North end of Monache Meadows - Sierra Nevada 2438 Comment
  CAS-BOT-BC151779  Diplacus mephiticus John Thomas Howell 1949-8-13 26266 Inyo Little Cottonwood Creek 2987 Comment
  CAS-BOT-BC151631  Diplacus torreyi John Thomas Howell 1943-7-28 18902 El Dorado 2 miles west of Pacific House Comment
  RSA126206  Dirca occidentalis J. T. Howell 1948-5-31 s.n. Marin Devil's Gulch, near Camp Taylor Comment
  CAS-BOT-BC195632  Distichlis spicata John Thomas Howell 1945-8-5 s.n. Marin Stinson Beach Comment
  CAS-BOT-BC208679  Distichlis spicata John Thomas Howell 1958-5-29 33617 Inyo Bishop 1264 Comment
  CAS-BOT-BC126906  Dodecatheon alpinum John Thomas Howell; Gordon H. True 1970-6-25 46807 Tulare Sirretta Meadows, Kern Plateau 2743 Comment
  CAS-BOT-BC136229  Dodecatheon alpinum John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-6-28 53165 Alpine Rocky subalpine meadowy flat, west base of Ebbetts Peak - Sierra Nevada 2743 Comment
  RSA69026  Dodecatheon clevelandii subsp. patulum J. T. Howell 1933-3-31 10917 San Francisco Bernal Heights. Comment
  CAS-BOT-BC41964  Draba albertina John Thomas Howell 1969-8-5 45877 Shasta Lassen Volcanic National Park. Dersch Meadows. Comment
  CAS-BOT-BC41991  Draba albertina John Thomas Howell 1946-7-14 22300 Inyo Rock Creek Lake Basin. Mosquito Flat. 3139 Comment
  GH379178  Draba albertina J. T. Howell & G. H. True 1970-6-23 46645 Unknown NE end of Big Meadow 2377 Comment
  CAS-BOT-BC41826  Draba breweri John Thomas Howell 1946-7-18 s.n. Fresno Mount Starr. Comment
  CAS-BOT-BC41716  Draba densifolia John Thomas Howell 1946-7-24 22696 a Inyo Mono Mesa. 3657 Comment
  CAS-BOT-BC41190  Draba lemmonii John Thomas Howell 1949-8-5 26076 Inyo Army Pass. 3657 Comment
  RSA0020557  Draba lemmonii var. lemmonii J. T. Howell 1940-8-2 15914 Tulare West of Reflection Lake. 3354 Comment
  CAS-BOT-BC41243  Draba oligosperma John Thomas Howell 1946-7-27 22797 a Fresno Northwest of Mono Pass. 3657 Comment
  CAS-BOT-BC41251  Draba oligosperma John Thomas Howell 1947-8-11 24012 Inyo South end of Coyote Ridge. 3657 Comment
  CAS-BOT-BC159690  Drymocallis glandulosa John Thomas Howell; Gordon H. True 1970-7-30 47152 Tulare Southwest end of Big Meadow just east of Cherry Hill Road, Kern Plateau - Sierra Nevada 2377 Comment
  CAS-BOT-BC159407  Drymocallis glandulosa var. glandulosa John Thomas Howell; Gordon H. True 1970-7-27 46915 Tulare Forest border of Big Meadow on the e. side at Joughin Camp - Kern Plateau, Sierra Nevada 2377 Comment
  RSA563353  Drymocallis glandulosa var. reflexa J. T. Howell 1970-6-24 46708 Tulare Kern Plateau, N Manter Creek, Big Meadow to Manter Meadow 2348 Comment
  CAS-BOT-BC536645  Drymocallis pseudorupestris John Thomas Howell 1944-7-16 19817 Glenn Black Butte Comment
  CAS-BOT-BC158422  Drymocallis rhomboidea John Thomas Howell 1937-7-21 13162 Siskiyou South Fork of Salmon River near Big Flat 1524 Comment
  CAS-BOT-BC70807  Dryopteris John Thomas Howell 1965-4-26 41173 Monterey 3 miles south of Oakhurst 914 Comment
  CAS-BOT-BC427999  Dudleya caespitosa John Thomas Howell 1933-7-23 11460 Marin Sausalito Hills Comment
  CAS-BOT-BC428321  Dudleya farinosa John Thomas Howell 1953-7-16 29114 A Mendocino 1 mile north of Elk Comment
  CAS-BOT-BC197016  Echinochloa colona John Thomas Howell 1967-11-3 44050 Tulare About 4.5 miles east-northeast of Pixley 83 Comment
  CAS-BOT-BC197146  Echinochloa crus-galli John Thomas Howell 1939-9-3 15343 Marin Near Novato Comment
  CAS-BOT-BC291131  Eclipta prostrata John Thomas Howell 1965-10-21 41420 Sacramento Levee of the Sacramento River at Miller Park, Sacramento Comment
  UCD61181  Ehrharta calycina John Thomas Howell 1968-4-24 44192 San Luis Obispo San Luis Obispo Co.: Just south of Nacimiento Dam on road to Paso Robles, Santa Lucia Mts. Comment
  CAS-BOT-BC113752  Eleocharis acicularis John Thomas Howell 1950-7-20 27121 Tulare Bakeoven Meadows, South Fork of Kern River. 2468 Comment
  CAS-BOT-BC112785  Eleocharis macrostachya John Thomas Howell 1959-9-20 34660 Butte Lower foothills, eastern outskirts of Oroville. 60 Comment
  CAS-BOT-BC112768  Eleocharis macrostachya John Thomas Howell 1960-8-23 36427 Shasta Reflection Lake Comment
  CAS-BOT-BC112846  Eleocharis macrostachya John Thomas Howell 1973-7-10 49805 Lassen Near Susanville on road to Janesville. 1295 Comment
  CAS-BOT-BC112936  Eleocharis macrostachya John Thomas Howell 1957-8-6 32876 San Francisco Pond in Strybing Aboretum, Golden Gate Park Comment
  SEINET10466724  Eleocharis macrostachya John Thomas Howell 1955-7-20 Howell 30886 Sierra Near Colpine, 4950 feet. 1510 Comment
  RSA26612  Eleocharis obtusa var. engelmannii J. T. Howell 1951-8-20 28212 Plumas Genesee 1128 Comment
  CAS-BOT-BC113182  Eleocharis palustris John Thomas Howell 1942-8-6 17761 Tulare Little Five Lakes Basin Comment
  CAS-BOT-BC112705  Eleocharis parishii John Thomas Howell 1970-9-22 47310 Tulare Fairview. 1066 Comment
  CAS-BOT-BC112054  Eleocharis quinqueflora John Thomas Howell 1943-7-19 18575 Placer Summit Valley. Comment
  RSA85  Eleocharis rostellata J. T. Howell 1927-7-21 449 Orange Santa Ana River, Rancho Santa Ana. 152 Comment
  CAS-BOT-BC112239  Eleocharis rostellata John Thomas Howell 1928-6-30 4053 Inyo Wet soil, Jail Canyon near the Burro Mine, Panamint Mts. 1066 Comment
  CAS-BOT-BC112023  Eleocharis suksdorfiana John Thomas Howell 1949-8-7 26097 Tulare Rock Creek 3169 Comment
  CAS-BOT-BC112034  Eleocharis suksdorfiana John Thomas Howell 1943-7-24 18750 Nevada Horse Range Valley Comment
  CAS-BOT-BC203823  Elymus X hansenii John Thomas Howell 1963-7-10 39714 Alpine Grover Hot Springs 1798 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-BC203854  Elymus X hansenii John Thomas Howell 1943-5-15 18090 Marin Tiburon Peninsula Comment
  CAS-BOT-BC213793  Elymus X hansenii John Thomas Howell 1969-8-28 46039 Tulare Near the pack station, Mineral King - Sierra Nevada 2377 Comment
  UCD62750  Elymus X hansenii John Thomas Howell 20-23 Jun 1977 52415 Plumas On the peninsula of Lake Almanor. 1371 Comment
  CAS-BOT-BC225718  Elymus elymoides John Thomas Howell; Gordon H. True 1970-6-26 46839 Tulare Mixed conifer forest at True Meadow, Kern Plateau, Sierra Nevada 2225 Comment
  CAS-BOT-BC227145  Elymus elymoides John Thomas Howell 1955-7-7 30539 Monterey North slope of summit of Junipero Serra Peak, Santa Lucia Mts. 1767 Comment
  CAS-BOT-BC227310  Elymus elymoides John Thomas Howell 1948-7-22 24879 Fresno Bubbs Creek Canyon in vicinity of Vidette Meadows 3048 Comment
  CAS-BOT-BC227512  Elymus elymoides John Thomas Howell 1941-8-2 16679 Madera Near Garnet Lake 2956 Comment
  CAS-BOT-BC227603  Elymus elymoides John Thomas Howell 1951-6-27 27564 Plumas Johnsville 1584 Comment
  CAS-BOT-BC228516  Elymus elymoides John Thomas Howell 1944-8-9 20177 Tuolumne Near Parsons Lodge, Tuolumne Meadows Comment
  CAS-BOT-BC227895  Elymus elymoides John Thomas Howell 1960-8-22 36364 Shasta Lassen Volcanic National Park. Manzanita Lake 1783 Comment
  UCD61648  Elymus elymoides subsp. brevifolius John Thomas Howell 1955-7-19 30780 -A Plumas Beckwourth. 1493 Comment
  GH365025  Elymus glaucus J. T. Howell 1943-7-4 18249 Unknown Ledum Swamp on road to Pt. Reyes Comment
  SEINET10864628  Elymus glaucus John Thomas Howell 1941-5-25 Howell 16215 Marin Rifle Camp, Mount Tamalpais. Comment
  CAS-BOT-BC203490  Elymus glaucus subsp. glaucus John Thomas Howell 1941-5-25 16215 Marin Rifle Camp, Mt. Tamalpais Comment
  CAS-BOT-BC203733  Elymus glaucus subsp. glaucus John Thomas Howell 1960-8-18 36083 Tehama Lassen Volcanic National Park. Sulphur Works Checking Station 2011 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-BC206514  Elymus glaucus subsp. glaucus John Thomas Howell; Walter Knight; Irja Knight 1966-7-28 1652 Plumas In area near Sweetwater Meadow - Butterfly Botanical Area and Vicinity 1127 Comment
  CAS-BOT-BC228679  Elymus multisetus John Thomas Howell 1956-6-5 31488 San Francisco North slope of Bayview Hills, San Francisco Comment
  RSA65  Elymus multisetus J. T. Howell 1927-6-8 53 Orange Botany Garden, Rancho Santa Ana. 152 Comment
  UCD62557  Elymus repens John Thomas Howell 1967-6-22 42663 Plumas Court house square, Quincy. 1036 Comment
  CAS-BOT-BC213848  Elymus sierrae John Thomas Howell 1951-7-21 28062 Tulare Marble, White Chief region, Mineral King and vicinity 2895 Comment
  CAS-BOT-BC213510  Elymus trachycaulus subsp. trachycaulus John Thomas Howell 1940-7-30 15711 Tulare East Lake Comment
  SEINET7292780 Image available Elysitanion hansenii John Thomas Howell 1977-1 52415 Plumas Sierra Nevada; Peninsula of Lake Almanor 1372 Comment
  CDA2053  Elytrigia repens J. T. Howell 1961-9-23 36826 Plumas Indian Valley. Comment
  CAS-BOT-BC81610  Ephedra californica John Thomas Howell 1977-3-11 52330 San Diego bank bordering San Felipe Wash sw. of Yaqui Pass Comment
  CAS-BOT-BC81673  Ephedra californica John Thomas Howell 1971-4-2 47595 Santa Barbara flats of Cuyama Valley in ne. corner of Santa Barbara Co. Comment
  CAS-BOT-BC81795  Ephedra nevadensis John Thomas Howell 1948-4-26 24254 Kern 2 miles north of Mojave Comment
  UC1042581  Ephedra viridis John Thomas Howell 1950-7-28 27421 Mono Leevining Canyon Sierra Nevada, Leevining Canyon 2255 Comment
  CAS-BOT-BC165930  Epilobium John Thomas Howell 1959-9-26 35076 Plumas 3.2 mi. w. of Belden Comment
  CAS-BOT-BC166329  Epilobium canum subsp. canum John Thomas Howell 1930-10-24 5636 Monterey 17.2 miles east of The Indians, Santa Lucia Mts. Comment
  CAS-BOT-BC166546  Epilobium canum subsp. latifolium John Thomas Howell; Gordon H. True 1969-9-30 46345 Tulare Cherry Hill Road 1 mile east of Kern Canyon Highway, Brish Creek Canyon. Kern Plateau 1219 Comment
  RSA88520  Epilobium canum subsp. latifolium J. T. Howell 1951-7-17 27833 Tulare White Chief Trail. Mineral King and vicinity. 2591 Comment
  JEPS33709  Epilobium ciliatum subsp. ciliatum John Thomas Howell 1926-6-13 2020 Stanislaus Knight's Ferry 121 Comment
  CAS-BOT-BC57890  Equisetum X ferrissii John Thomas Howell 1963-5-18 39355 Monterey Aromas. 30 Comment
  CAS-BOT-BC57080  Equisetum arvense John Thomas Howell; Gordon H. True 1967-7-3 42856 Tulare Rockhouse Meadow, Kern Plateau 1706 Comment
  CAS-BOT-BC57935  Equisetum arvense John Thomas Howell 1962-9-22 38759 Kern Kern Co. Park, Greenhorn Mountains. 1828 Comment
  RSA88306  Equisetum arvense J. T. Howell 1953-5-22 28984 Tuolumne Cedar Ridge Road near Twain Harte. 915 Comment
  CAS-BOT-BC57265  Equisetum laevigatum John Thomas Howell 1958-7-22 33732 Fresno Simpson Meadow 1828 Comment
  CAS-BOT-BC57238  Equisetum laevigatum John Thomas Howell 1930-4-13 4691 Calaveras North Fork of Calaveras River 2 miles west of San Andreas Comment
  CAS-BOT-BC57399  Equisetum laevigatum John Thomas Howell 1960-7-24 35994 Plumas Chester 1371 Comment
  CAS-BOT-BC204588  Eragrostis mexicana subsp. virescens John Thomas Howell 1948-8-1 25271 Mono Just north of summit of Sherwin Grade Comment
  CAS-BOT-BC204646  Eragrostis mexicana subsp. virescens John Thomas Howell 1954-9-6 30095 Tuolumne Between Tuttletown and Rawhide Comment
  SBBG115765  Eragrostis pectinacea J. T. Howell 1954-9-6 30072 Calaveras Altaville Comment
  CAS-BOT-BC284141  Eragrostis pectinacea var. pectinacea John Thomas Howell 1963-6-21 39451 Monterey King City 100 Comment
  POM303727  Erechtites minimus J. T. Howell 1944-7-30 19857 Marin Almonte. Comment
  CAS-BOT-BC174124  Eremogone aculeata John Thomas Howell 1941-8-5 16762 Madera Near Garnet Lake 2956 Comment
  CAS-BOT-BC174165  Eremogone aculeata John Thomas Howell 1944-8-14 20474 Tuolumne Tuolumne Canyon above Glen Aulin Comment
  UCR88855  Eremogone ferrisiae J. T. Howell 1958-5-28 33535 Inyo Sierra Nevada Mtns, Bishop Creek 1951 Comment
  CAS-BOT-BC512630  Eriastrum abramsii John Thomas Howell 1960-4-23 35215 Santa Clara San Antonio Valley Comment
  JEPS69021  Eriastrum densifolium subsp. austromontanum John Thomas Howell 1927-8-2 2908 Riverside between Banning and Strawberry Valley; Mt. St. Jacinto Comment
  UC518007  Eriastrum densifolium subsp. elongatum John Thomas Howell 1933-8-16 11524 San Benito 6 miles N of the Pinnacles. Comment
  CAS-BOT-BC514500  Eriastrum eremicum subsp. eremicum John Thomas Howell 1927-8-1 2890 San Bernardino Along the road in the upper part of Morongo Valley, east end, Mojave Desert Comment
  JEPS33703  Eriastrum sapphirinum John Thomas Howell 1927-6-12 2511 San Bernardino Deadman's Point Mojave Desert 914 Comment
  RSA0124859  Eriastrum wilcoxii J. T. Howell 1928-6-14 3897 Inyo Surprise Canyon, near Panamint City, Panamint Mountains. Comment
  CAS-BOT-BC131552  Ericameria arborescens John Thomas Howell 1956-12-4 31976 Mariposa 1 mile from Mariposa on road to Briceburg Comment
  CAS-BOT-BC286684  Ericameria bloomeri John Thomas Howell 1951-8-21 28260 Sierra East side of Yuba Pass 1828 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-BC291272  Ericameria bloomeri John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-8-10 54431 Amador On Carson Pass road just west of Carson Spur near Kirkwood 2407 Comment
  POM183302  Ericameria cuneata var. cuneata J. T. Howell 1931-10-11 8144 Mariposa Wawona Point Comment
  CAS-BOT-BC286857  Ericameria discoidea John Thomas Howell 1940-8-1 15799 Tulare Between Reflection Lake and Harrison Pass Comment
  CAS-BOT-BC298932  Ericameria nauseosa var. ceruminosa John Thomas Howell; Gordon H. True 1967-9-18 43759 Tulare Recreation area, N end of Lamont Meadow, Kern Plateau 1706 Comment
  CAS-BOT-BC298943  Ericameria nauseosa var. ceruminosa John Thomas Howell 1967-11-6 44179 Kern About 4.5 miles W of Wofford Heights, Greenhorn Mts 1219 Comment
  CAS-BOT-BC298073  Ericameria nauseosa var. mohavensis John Thomas Howell 1931-9-7 8085 San Benito San Benito River 2 miles SE of Hernandez Comment
  CAS-BOT-BC298104  Ericameria nauseosa var. mohavensis John Thomas Howell 1970-9-22 s.n. Tulare Kern Canyon 1.5 miles N of River Kern 853 Comment
  CAS-BOT-BC294154  Ericameria nauseosa var. speciosa John Thomas Howell 1947-8-13 24042 Inyo Black Lake Trail, Big Pine Lakes 3200 Comment
  CAS-BOT-BC294290  Ericameria nauseosa var. speciosa John Thomas Howell 1974-9-20 50902 Plumas About 2 miles from Spring Garden on road to Quincy 1158 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
  CAS-BOT-BC294313  Ericameria nauseosa var. speciosa John Thomas Howell 1960-7-24 35991 Plumas Kelly Camp, just south of Lassen Park 1615 Comment
  CAS-BOT-BC298300  Ericameria nauseosa var. speciosa John Thomas Howell 1946-9-8 22994 Marin Along Redwood Highway at St Vincent's Comment
  CAS-BOT-BC293027  Ericameria parryi var. nevadensis John Thomas Howell 1959-9-24 34960 Plumas Near Blairsden 1341 Comment
  JEPS19153  Ericameria pinifolia John Thomas Howell 1927-11-13 3204 Los Angeles near Elizabeth Lake; Liebre Mts. Comment
  CAS-BOT-BC293206  Ericameria suffruticosa John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50665 Lassen Summit ridge of Diamond Mt. 2346 Comment
  GH417498  Ericameria suffruticosa J. T. Howell 1941-8-10 16901 Unknown Summit of trail between Garnet and Shadow lakes Comment
  CAS-BOT-BC293426  Erigeron algidus John Thomas Howell 1946-7-15 22380 Inyo Between Mosquito Flat and Ruby Lake, Rock Creek Lake Basin Comment
  CAS-BOT-BC293592  Erigeron barbellulatus John Thomas Howell 1943-7-21 18666 Placer Mt. Lincoln Comment
  CAS-BOT-BC294680  Erigeron breweri var. breweri John Thomas Howell; Gordon H. True 1966-7-12 41838 Kern Rim of plateau just east of Fay Creek canyon, Kern Plateau 2194 Comment
  CAS-BOT-BC294792  Erigeron breweri var. breweri John Thomas Howell 1950-7-16 26961 Tulare Gorge north of Bakeoven Meadows, South Fork of Kern River 2499 Comment
  CAS-BOT-BC297054  Erigeron breweri var. breweri John Thomas Howell 1962-7-10 38516 Kern Summit of Cooks Peak, Greenhorn Mountains, Sierra Nevada 2103 Comment
  SD149187  Erigeron breweri var. breweri John Thomas Howell 1962-9-24 38863 Kern Summit of Cook's Peak; Greenhorn Mountains. 2100 Comment
  CAS-BOT-BC295008  Erigeron compositus John Thomas Howell 1949-8-5 26072 Inyo Army Pass 3657 Comment
  CAS-BOT-BC296727  Erigeron coulteri John Thomas Howell 1946-7-15 22387 Inyo Between Mosquito Flat and Ruby Lake, Rock Creek Lake Basin Comment
  CAS-BOT-BC296771  Erigeron coulteri John Thomas Howell 1950-7-24 27256 Tulare Monache Creek, Sierra Nevada 2560 Comment
  CAS-BOT-BC42762  Erigeron eatonii var. plantagineus John Thomas Howell 1934-7-3 12379 Modoc 5 mi S of Hackamore. Comment
  CAS-BOT-BC300419  Erigeron eatonii var. sonnei John Thomas Howell 1977-6-21 52393 Plumas Near Almanor P. O., Lake Almanor 1371 Comment
  CAS-BOT-BC42771  Erigeron filifolius John Thomas Howell 1934-6-12 12014 Modoc Between Davis Creek and Plum Valley. Comment
  CAS-BOT-BC49630  Erigeron filifolius John Thomas Howell 1934-6-12 12014 Modoc Between Davis Creek and Plum Valley. Comment
  UCD131895  Erigeron floribundus John Thomas Howell 1975-9-10 51506 San Francisco Main St, between Market and Mission streets. Comment
  CAS-BOT-BC295229  Erigeron inornatus John Thomas Howell; Gordon H. True; Walter Knight; Irja Knight 1967-7-10 2160 Plumas Butterfly Botanical Area and vicinity. Confluence of Butterfly Creek 883 Comment
  CAS-BOT-BC295331  Erigeron lonchophyllus John Thomas Howell; Gordon H. True 1970-6-26 46878 Tulare Taylor Meadow, Kern Plateau 2194 Comment
  POM303659  Erigeron miser J. T. Howell 1943-7-17 s.n. Nevada West side of Donner Pass near Norden. 2134 Comment
  CAS-BOT-BC295769  Erigeron petrophilus var. petrophilus John Thomas Howell 1933-8-13 11503 Santa Clara Summit of Mt. Hamilton Comment
  UC1177261  Erigeron petrophilus var. petrophilus John Thomas Howell 1943-5-30 Marin Northside Trail Mt. Tamalpais, Northside Trail Comment
  CAS-BOT-BC300167  Erigeron pygmaeus John Thomas Howell 1947-8-11 23986 Inyo Inconsolable Range 3810 Comment
  A402877  Eriodictyon tomentosum J. T. Howell 1933-8-18 11565 Unknown 17 miles east of Jamesburg, Santa Lucia Mts. Comment
  CAS-BOT-BC248486  Eriogonum angulosum John Thomas Howell 1930-5-8 4759 Monterey 7 miles north of San Bernardo Comment
  CAS-BOT-BC248749  Eriogonum argillosum John Thomas Howell 1938-5-28 13828 Merced Los Banos Hills Comment
  RSA206  Eriogonum baileyi var. baileyi J. T. Howell 1927-6-12 107 San Bernardino 12 miles SE of Victorville. 915 Comment
  CAS-BOT-BC241567  Eriogonum baileyi var. baileyi John Thomas Howell; G. H. True 1973-7-31 50144 Lassen Janesville 1295 Comment
  RSA22441  Eriogonum baileyi var. brachyanthum J. T. Howell 1938-8-8 14385 Mono Long Valley Comment
  LA52299  Eriogonum cinereum John Thomas Howell; 1927-8-15 2990 Ventura Comment
  RSA1006  Eriogonum cinereum J. T. Howell 1927-8-15 628 Ventura Conejo Grade. 213 Comment
  RSA137116  Eriogonum deflexum var. baratum J. T. Howell 1957-6-24 s.n. Inyo 4 miles south of Olancha. 915 Comment
  RSA128704  Eriogonum elegans J. T. Howell 1957-4-29 32074 Monterey Salinas River, King City. Comment
  CAS-BOT-BC249946  Eriogonum fasciculatum var. foliolosum John Thomas Howell 1927-6-1 2407 Orange Southern Puente Hills in the Santa Ana Canon [Canyon] 152 Comment
  UCD100027  Eriogonum fasciculatum var. polifolium John Thomas Howell 1962-5-20 37119 Kern Kernville. 807 Comment
  CAS-BOT-BC250382  Eriogonum gracile John Thomas Howell 1929-9-21 4392 Contra Costa Marsh Creek Road 8 miles se. of Clayton Comment
  UCD100124  Eriogonum gracile John Thomas Howell 1950-11-7 27478 Monterey 15 miles west of Greenfield on Jamesburg Road, Santa Lucia Mountains. Comment
  RSA766505  Eriogonum gracillimum J. T. Howell 1958-5-21 33034 Kern 7 miles east of Bakersfield. 213 Comment
  CAS-BOT-BC261226  Eriogonum hirtiflorum John Thomas Howell 1937-5-19 12947 San Benito The Pinnacles Comment
  RSA98060  Eriogonum hirtiflorum J. T. Howell 1952-10-28 28903 Tulare Eleven Range View Point, Sequoia Park 1585 Comment
  CAS-BOT-BC252867  Eriogonum incanum John Thomas Howell 1949-7-22 25622 Tulare Mt. Guyot 3657 Comment
  CAS-BOT-BC252894  Eriogonum incanum John Thomas Howell 1951-7-16 27811 Tulare Near Eagle Lake, Mineral King and Vicinity 3048 Comment
  CAS-BOT-BC252916  Eriogonum incanum John Thomas Howell 1948-7-28 25131 Tulare Juncion Pass Trail 3886 Comment
  CAS-BOT-BC257450  Eriogonum inerme var. hispidulum John Thomas Howell; Gordon H. True 1971-6-17 48066 Kern Bodfish Grove of Piute Cypress, 2 miles east of Bodfish Gap 1432 Comment
  CAS-BOT-BC257749  Eriogonum kennedyi var. alpigenum John Thomas Howell 1947-7-25 23675 San Bernardino Mt. San Gorgonio, San Bernardino Mts. 3505 Comment
  CAS-BOT-BC266052  Eriogonum latifolium John Thomas Howell 1933-10-8 11705 Marin Pt. Reyes Peninsula Comment
  RSA766132  Eriogonum latifolium J. T. Howell 1930-6-8 5257 Sonoma 1 mile east of Bodega Bay Comment
  CAS-BOT-BC259374  Eriogonum lobbii John Thomas Howell 1937-7-25 13506 Trinity Stuarts Fork of Trinity River 2225 Comment
  CAS-BOT-BC259287  Eriogonum lobbii John Thomas Howell 1946-7-21 22610 Inyo Mono Pass Trail above Ruby Lake, Rock Creek Lake Basin Comment
  CAS-BOT-BC259495  Eriogonum luteolum var. caninum John Thomas Howell 1944-7-7 19680 Marin Above Camp Handy, Mt. Tamalpais Comment
  CAS-BOT-BC263102  Eriogonum maculatum John Thomas Howell 1962-5-21 37179 Kern Northeast of Lake Isabella 792 Comment
  RSA204  Eriogonum maculatum J. T. Howell 1927-8-1 539 San Bernardino Warren's Well, Mojave Desert 915 Comment
  UC849522  Eriogonum marifolium John Thomas Howell 1937-7-26 13517 Siskiyou Caribou Basin Salmon-Trinity Alps, Caribou Basin 1981 Comment
  UCD100477  Eriogonum nidularium John Thomas Howell 1958-5-28 33595 Inyo Bishop Creek. 1524 Comment
  CAS-BOT-BC27334  Eriogonum nudum var. auriculatum John Thomas Howell 1933-8-18 11592 Monterey Carmel Valley, 9 miles E of Carmel Comment
  GH364369  Eriogonum nudum var. decurrens J. T. Howell 1933-8-19 11612 Unknown Mt. Hermon Comment
  CAS-BOT-BC261701  Eriogonum nudum var. oblongifolium John Thomas Howell 1930-8-24 5447 Lake 4 miles from Middletown on Adams Springs Road Comment
  CAS-BOT-BC269755  Eriogonum nudum var. paralinum John Thomas Howell 1931-6-17 6729 Del Norte 5 miles s. of Crescent City Comment
  CAS-BOT-BC269879  Eriogonum nudum var. pubiflorum John Thomas Howell 1950-7-26 27371 Inyo Olancha Pass to Sage Flat 2743 Comment
  CAS-BOT-BC269930  Eriogonum nudum var. pubiflorum John Thomas Howell 1929-11-29 4545 Mariposa 5 miles from Mt. Bullion on road to Cathay Valley Comment
  CAS-BOT-BC266795  Eriogonum nudum var. scapigerum John Thomas Howell 1940-8-1 15827 Tulare Between Reflection Lake and Harrison Pass Comment
  RSA218012  Eriogonum ordii J. T. Howell 1963-6-22 30509 Monterey Near summit of Mustang Grade east of San Lorenzo Creek Comment
  CAS-BOT-BC258707  Eriogonum ovalifolium var. nivale John Thomas Howell 1940-8-2 15920 Tulare West of Reflection Lake 3505 Comment
  RSA88595  Eriogonum pedunculatum J. T. Howell 1951-6-26 27541 Plumas Feather River Canyon 854 Comment
  CAS-BOT-BC258172  Eriogonum pusillum John Thomas Howell 1957-6-24 32744 Inyo Olancha 1112 Comment
  CAS-BOT-BC267694  Eriogonum roseum John Thomas Howell 1973-10-31 50278 Tulare Near Potwisha, Middle Fork of Kaweah River, Sierra Nevada 609 Comment
  CAS-BOT-BC268395  Eriogonum roseum John Thomas Howell 1933-8-13 11493 Santa Clara 3 miles from Smith Creek on road to San Jose Comment
  UCD101170  Eriogonum roseum John Thomas Howell 1967-5-30 42449 Tulare Kern Plateau, between Lamont Meadow and Long Valley. 1737 Comment
  CAS-BOT-BC253058  Eriogonum roseum John Thomas Howell 1929-7-21 4339 Merced Merced River bottom at Hopton Bridge Comment
  CAS-BOT-BC268318  Eriogonum roseum John Thomas Howell 1957-6-25 32761 Kern Tehachapi Mts., 2.5 miles se. of Keene 914 Comment
  CAS-BOT-BC267561  Eriogonum saxatile John Thomas Howell 1927-7-9 2702 San Bernardino Whiskey Spring, Cushenberry Road, desert side San Bernardino Mts. 1652 Comment
  CAS-BOT-BC267530  Eriogonum saxatile John Thomas Howell; Gordon H. True 1971-7-16 48636 Tulare Near Last Chance Creek about 2 miles northwest of Johnsondale, Sierra Nevada 2042 Comment
  CAS-BOT-BC268606  Eriogonum spergulinum var. pratense John Thomas Howell 1950-7-22 27180 Tulare Olancha Peak 3261 Comment
  CAS-BOT-BC272595  Eriogonum spergulinum var. reddingianum John Thomas Howell 1950-8-29 27440 Inyo Onion Valley road 2438 Comment
  CAS-BOT-BC272632  Eriogonum spergulinum var. reddingianum John Thomas Howell 1958-8-9 34249 Madera Miller Meadow 2103 Comment
  NY283063  Eriogonum spergulinum var. reddingianum J. T. Howell 1938-8-10 14504 Mono Near Crestview Comment
  POM203845  Eriogonum spergulinum var. reddingianum J. T. Howell 1934-7-6 12446 Lassen Harvey Valley Comment
  CAS-BOT-BC271843  Eriogonum spergulinum var. reddingianum John Thomas Howell; Gordon H. True 1970-7-27 46928 Tulare Forest border of Big Meadow, on the east side of Joughin Camp, Kern Plateau 2377 Comment
  CAS-BOT-BC271852  Eriogonum spergulinum var. reddingianum John Thomas Howell 1942-8-1 17502 Tulare Between Morane Lake and Sky Parlor Meadow 2834 Comment
  CAS-BOT-BC272652  Eriogonum spergulinum var. reddingianum John Thomas Howell 1938-8-10 14497 Mono 5 miles s. of Crestview Comment
  CAS-BOT-BC211385  Eriogonum sphaerocephalum var. halimioides John Thomas Howell 1934-6-11 11926 Modoc Parker Creek, Warner Mts. 1584 Comment
  UC849749  Eriogonum strictum var. proliferum John Thomas Howell 1937-7-29 13676 Siskiyou n slope of Scott Mountains Scott Mountains 1676 Comment
  CAS-BOT-BC267442  Eriogonum truncatum John Thomas Howell 1934-4-8 11816 Contra Costa 10 miles from Clayton on Marsh Creek Road Comment
  CAS-BOT-BC267874  Eriogonum umbellatum var. bahiiforme John Thomas Howell 1942-5-24 16967 Contra Costa Eagle Peak, Mount Diablo Comment
  CAS-BOT-BC267846  Eriogonum umbellatum var. chlorothamnus John Thomas Howell 1963-8-21 40226 Inyo Whitney Portal Road, Sierra Nevada 2255 Comment
  CAS-BOT-BC265088  Eriogonum umbellatum var. nevadense John Thomas Howell 1948-7-31 25242 Inyo Kearsarge Pass Trail 2895 Comment
  CAS-BOT-BC268263  Eriogonum umbellatum var. nevadense John Thomas Howell 1925-6-30 1263 El Dorado Armstrong's, Emerald Bay, Lake Tahoe 1889 Comment
  POM260788  Eriogonum umbellatum var. polyanthum Thomas Howell 1940-6-13 8115 Modoc [Unspecified] Comment
  CAS-BOT-BC262163  Eriogonum umbellatum var. subaridum John Thomas Howell; Gordon H. True 1969-9-30 46377 Tulare Cherry Hill Road 4 miles from Burton Camp, canyon of Poison Meadow Creek, Kern Plateau 2194 Comment
  UCD101523  Eriogonum vimineum John Thomas Howell 1955-7-19 30807 Plumas Vinton. 1508 Comment
  CAS-BOT-BC264134  Eriogonum vimineum John Thomas Howell 1959-9-26 35079 Plumas 5 mi. NE of Storrie, Sierra Nevada 609 Comment
  RSA136748  Eriogonum viridescens J. T. Howell 1955-7-8 30618 Monterey San Anonio River; 8.5 mi. from San Antonio Mission on roas to Santa Lucia Camp. 366 Comment
  CAS-BOT-BC261867  Eriogonum wrightii var. subscaposum John Thomas Howell 1942-7-27 17312 Tulare Cliff Creek between Deer Creek and Pinto Lake Comment
  CAS-BOT-BC261983  Eriogonum wrightii var. subscaposum John Thomas Howell; Gordon H. True 1967-8-7 43411 Tulare About 2 miles northwest of Beach Meadow, Kern Plateau 2499 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
  CAS-BOT-BC297869  Eriophyllum confertiflorum John Thomas Howell 1962-7-11 38625 Kern S side of Black Mt, Greenhorn Mts 1417 Comment
  CAS-BOT-BC304269  Eriophyllum confertiflorum John Thomas Howell 1931-5-29 6581 Ventura Santa Susana Pass Comment
  CAS-BOT-BC300934  Eriophyllum jepsonii John Thomas Howell 1937-5-20 12988 San Benito 10 miles east of Paicines Comment
  CAS-BOT-BC301121  Eriophyllum lanatum var. achilleoides John Thomas Howell 1937-7-29 13650 Siskiyou Scott Mt. between Trinity and Siskiyou cos. Comment
  CAS-BOT-BC301199  Eriophyllum lanatum var. arachnoideum John Thomas Howell 1927-5-8 2373 Marin North side of Mt. Tamalpais Comment
  CAS-BOT-BC308175  Eriophyllum lanatum var. grandiflorum John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-6-26 53028 Calaveras Near Dorrington, Sierra Nevada 1524 Comment
  RSA44445  Eriophyllum lanatum var. integrifolium J. T. Howell 1947-8-11 23992 Inyo Baker Lakes 3506 Comment
  CAS-BOT-BC308319  Eriophyllum lanatum var. obovatum John Thomas Howell 1927-7-10 2738 San Bernardino South side of Big Bear Lake, San Bernardino Mts. 2042 Comment
  UC905070  Erodium brachycarpum John Thomas Howell 1947-4-23 23075 Marin e side Drakes Estero; Point Reyes Peninsula Comment
  POM180619  Eryngium armatum J. T. Howell 1930-6-8 5295 Sonoma 4 miles north of Bodega Bay Comment
  CAS-BOT-BC218455  Eryngium pinnatisectum John Thomas Howell 1954-9-6 30101 Tuolumne New Montezuma Comment
  CAS-BOT-BC218463  Eryngium spinosepalum John Thomas Howell 1952-10-29 28915 Fresno Valley in low foothills, 7 miles east of Minkler Comment
  CAS-BOT-BC41542  Erysimum capitatum John Thomas Howell 1940-7-28 15666 Fresno Bubbs Creek. Near Charlotte Creek. Comment
  CAS-BOT-BC40867  Erysimum capitatum John Thomas Howell 1931-5-23 6510 Monterey Top of Jolon Grade, 13 miles west of King City, Santa Lucia Mountains. Comment
  CAS-BOT-BC54301  Erysimum capitatum John Thomas Howell 1926-3-21 1738 Napa Old toll road to Mount Saint Hellena. Comment
  CAS-BOT-BC54461  Erysimum capitatum John Thomas Howell 1948-6-15 24361 San Luis Obispo Red Hills southeast of Shandon. 762 Comment
  GH379426  Erysimum capitatum J. T. Howell & G. H. True 1969-5-12 45585 Unknown near Glennville 1036 Comment
  CAS-BOT-BC311789  Erysimum concinnum John Thomas Howell; Catherine Best; Wilma Follette; Gordon H. True 1980-6-19 53726 Marin Near Abbotts Lagoon, Point Reyes Peninsula Comment
  UC1177251  Erysimum concinnum John Thomas Howell 1939-5-28 7379 Marin Pt. Reyes lighthouse Comment
  CAS-BOT-BC55081  Erysimum perenne John Thomas Howell 1943-7-17 18454 Nevada West side of Donner Pass near Norden. 2133 Comment
  CAS-BOT-BC55133  Erysimum perenne John Thomas Howell 1951-7-18 27896 Tulare Mineral King and Vicinity. West side, Franklin Pass. 3352 Comment
  CAS-BOT-BC55135  Erysimum perenne John Thomas Howell; Gordon H. True 1967-5-29 42343 Tulare Sierra Nevada. Kern Plateau. Midway between Chimney and Lamont meadows. 1889 Comment
  RSA66153  Erysimum teretifolium J. T. Howell 1939-6-16 s.n. Santa Cruz Ben Lomond Sand Hills Comment
  CAS-BOT-BC153586  Erythranthe moniliformis John Thomas Howell 1958-8-16 34486 Madera Sadler Lake. East Fork of Granite Creek 2848 Comment
  CAS-BOT-BC504535  Erythronium multiscapideum John Thomas Howell; Gordon H. True 1969-4-9 45492 Butte Magalia 701 Comment
  UC1042408  Erythronium purpurascens John Thomas Howell 1951-6-28 27684 Plumas Eureka Peak 1981 Comment
  CAS-BOT-BC403202  Eschscholzia californica John Thomas Howell 1954-4-22 29141 Marin South end of Tiburon Peninsula Comment
  CAS-BOT-BC310425  Eucephalus breweri John Thomas Howell 1942-7-31 17428 Tulare Between Big Arroyo and Chagoopa Plateau Comment
  CAS-BOT-BC312070  Eucephalus breweri John Thomas Howell 1958-8-17 34550 Madera Between Cora Lake and The Niche, East Fork of Granite Creek, Sierra Nevada 2560 Comment
  CAS-BOT-BC202388  Euphorbia ocellata John Thomas Howell 1931-11-1 8168 Calaveras At Pardee Dam, Mokelumne River Comment
  UCD142677  Euphorbia prostrata John Thomas Howell 1969-9-15 46227 Tuolumne Sierra Nevada. Sonora. 548 Comment
  CAS-BOT-BC310577  Eurybia integrifolia John Thomas Howell 1944-8-6 19995 Tuolumne Between Dog Lake and Tuolumne Meadows Comment
  CAS-BOT-BC310521  Eurybia integrifolia John Thomas Howell 1945-9-29 21529 El Dorado Near Tamrack [Tamarack] Lake Comment
  RSA944  Euthamia occidentalis J. T. Howell 1927-10-29 777 Orange Bryant Ranch near Long Beach. 15 Comment
  UC1106096  Festuca californica John Thomas Howell 1945-6-12 20952 Marin Point Reyes Peninsula, near radio station Point Reyes Peninsula Comment
  CAS-BOT-BC278306  Festuca californica subsp. californica John Thomas Howell 1945-6-19 21071 Lake Sawmill Flat, Bartlett Mountain 1219 Comment
  CAS-BOT-BC283194  Festuca californica subsp. californica John Thomas Howell; Catherine Best; Wilma Follette; Mary P. Wells; Gordon H. True 1981-5-14 54013 Sonoma Fairfield Osborn Preserve of the Nature Conservancy, 4.5 miles northeast of Penngrove on teh west slope of Sonoma Mountain 457 Comment
  CAS-BOT-BC282506  Festuca elmeri John Thomas Howell 1947-5-4 23121 Marin San Rafael Hills Comment
  CAS-BOT-BC282513  Festuca elmeri John Thomas Howell 1944-7-7 19674 Marin Fish Grade between Phoenix and Lagunitas Lakes Comment
  POM203058  Festuca idahoensis J. T. Howell 1934-6-30 12293 Modoc Duncan Horse Camp. Comment
  CAS-BOT-BC278902  Festuca occidentalis John Thomas Howell 1951-7-15 27778 Tulare Mineral King road 1828 Comment
  RSA127202  Festuca occidentalis J. T. Howell 1943-6-6 18216 Marin Tenderfoot Trail above Mill Valley. Comment
  CAS-BOT-BC278994  Festuca rubra John Thomas Howell 1966-4-18 41489 Marin John Thomas Howell Botanical Garden, Tiburon Comment
  CAS-BOT-BC279023  Festuca rubra John Thomas Howell 1951-6-28 27659 Plumas Johnsonville 1584 Comment
  CAS-BOT-BC278599  Festuca saximontana John Thomas Howell 1951-7-17 27853 Tulare Mineral King and vicinity. White Chief Trail 2895 Comment
  CAS-BOT-BC278618  Festuca subulata John Thomas Howell 1958-7-23 33839 Fresno Simpson Meadow, Middle Fork of the Kings River 1828 Comment
  CAS-BOT-BC217644  Fraxinus dipetala John Thomas Howell 1927-7-26 2844 Orange Claymine Canyon, n. Santa Ana Mts. 243 Comment
  CAS-BOT-BC218551  Fraxinus latifolia John Thomas Howell; Gordon H. True 1966-7-10 41598 Tulare Kern River at Roads End, Sierra Nevada 1066 Comment
  CAS-BOT-BC223501  Fraxinus latifolia John Thomas Howell 1956-12-4 31991 Mariposa Merced River Canyon 2.6 miles above Briceburg Comment
  CAS-BOT-BC212381  Fremontodendron californicum John Thomas Howell; Alice Eastwood 1938-5-15 5533 Lake Mirabel Mine Comment
  CAS-BOT-BC136065  Fritillaria affinis John Thomas Howell 1926-4-11 1849 Alameda Cedar Mt. above Rancho Repose Comment
  CAS-BOT-BC505272  Fritillaria atropurpurea John Thomas Howell 1939-8-2 14896 Siskiyou Spirit Lake, Marble Mts. 1828 Comment
  LA50688  Galium angustifolium John Thomas Howell; 1930-5-19 5176 Ventura Monica Mountains, Pt. Mugu Comment
  RSA66720  Galium bolanderi J. T. Howell 1930-5-15 5166 Kern Hills near Glenville, Greenhorn Range. 976 Comment
  CAS-BOT-BC217439  Galium californicum subsp. luciense John Thomas Howell 1965-5-11 41316 Monterey East slope of Cone Peak, Santa Lucia Range 1298 Comment
  RSA118024  Galium clementis J. T. Howell 1955-5-17 s.n. Monterey East end of summit ridge of Juniper Serra Peak. 1768 Comment
  JEPS62620  Galium divaricatum John Thomas Howell and Gordon H. True 1967-6-13 3572 Yuba river e Wheatland; Bear River, Camp Far West Reservoir 60 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
  GH385969  Galium hallii J. T. Howell & G. H. True 1967-7-3 42883 Unknown about 1.5 miles northeast of Long Valley, on road to Chimney Meadow. Kern Plateau 2103 Comment
  CAS-BOT-BC217572  Galium hypotrichium subsp. subalpinum John Thomas Howell 1947-8-11 24011 Inyo South end of Coyote Ridge 3657 Comment
  CAS-BOT-BC217615  Galium stellatum subsp. stellatum John Thomas Howell; Alice Eastwood 1940-3-28 7784 Inyo Titus Canyon Comment
  JEPS29538  Galium trifidum var. pusillum John Thomas Howell 1959-9-23 34886 Lassen n end of lake Lassen Volcanic National Park, Juniper Lake 2057 Comment
  CAS-BOT-BC188515  Garrya elliptica John Thomas Howell 1930-9-14 5472 Mendocino 4.5 miles n. Ft. Bragg Comment
  CAS-BOT-BC199065  Garrya elliptica John Thomas Howell 1968-5-23 s.n. San Benito On road from San Juan Bautista to Fremont Peak Comment
  CAS-BOT-BC200613  Garrya elliptica John Thomas Howell 1930-6-15 5304 Alameda NE. slope of Grizzley [Grizzly] Peak, Berkeley Hills Comment
  CAS-BOT-BC144445  Garrya fremontii John Thomas Howell 1940-6-1 15567 Mariposa Snow Creek Trail 1676 Comment
  CAS-BOT-BC282586  Gastridium phleoides John Thomas Howell 1956-12-3 31974 Mariposa Aqua Fria, Sierra Nevada Comment
  CAS-BOT-BC283923  Gastridium ventricosum John Thomas Howell 1964-6-29 40741 San Luis Obispo Adjacent to the Protestant Cemetary, about 1 mile N of Cambria Comment
  CAS-BOT-BC56244  Gaultheria humifusa John Thomas Howell 1946-7-28 22824 Inyo Gem Lake, Rock Creek Lake Basin 3352 Comment
  RSA54096  Gaultheria humifusa J. T. Howell 1945-9-25 21500 Tuolumne Young Lake Comment
  CAS-BOT-BC58884  Gaultheria shallon John Thomas Howell 1949-5-15 25318 Marin Inverness Ridge west of Inverness Comment
  RSA39993  Gayophytum diffusum subsp. parviflorum J. T. Howell 1944-8-14 20469 Tuolumne Tuolumne Canyon above Glen Aulin. Comment
  RSA44284  Gayophytum diffusum subsp. parviflorum J. T. Howell 1947-8-8 23903 Inyo Third to fifth Lake, Big Pine Lakes. 3201 Comment
  CAS-BOT-BC208057  Genista monspessulana John Thomas Howell 1959-9-20 34676 Butte Lower foothills, eastern outskirts of Oroville 60 Comment
  CAS-BOT-BC211851  Genista monspessulana John Thomas Howell 1947-7-14 23344 Monterey Big Sur Comment
  CAS-BOT-BC211860  Genista monspessulana John Thomas Howell 1947-7-14 23344 Monterey Big Sur Comment
  RSA118020  Gilia achilleifolia subsp. multicaulis J. T. Howell 1955-5-21 30241 Monterey Hastings Reservation, Santa Lucia Mountains Comment
  UCR74666  Gilia capitata subsp. abrotanifolia J. T. Howell, G. H. True 1968-5-13 44318 Tulare Sierra Nevada Mtns., Kern Plateau, Cherry Hill Rd., Brush Creek Canyon 1585 Comment
  POM179726  Gilia capitata subsp. tomentosa J. T. Howell 1930-6-8 5365 Sonoma 1 mile east of Bodega Bay Comment
  CAS-BOT-BC226203  Gilia interior John Thomas Howell; Gordon H. True 1969-5-13 45683 Kern Spanish Needle Creek road to Lamont Meadow 1463 Comment
  UCR88756  Gilia inyoensis J. T. Howell, G. H. True 1967-7-5 43064 Tulare Kern Plateau, 6.4 mi north of Chimney Meadow 2226 Comment
  RSA469396  Gilia latiflora subsp. davyi J. T. Howell 1948-4-26 s.n. Kern 2 miles north of Mohave. Comment
  CAS-BOT-BC226376  Gilia latiflora subsp. elongata John Thomas Howell 1928-4-4 3703 San Bernardino 11 miles ne. of Johannesburg on road to Trona, Mojave Desert Comment
  CAS-BOT-BC303715  Glebionis segetum John Thomas Howell 1943-7-4 18277 Marin Inverness Comment
  RSA121031  Glinus lotoides J. T. Howell 1956-9-13 31875 Marin Strand of Bon Tempe Reservoir. Comment
  CAS-BOT-BC181027  Glossopetalon spinescens John Thomas Howell; Alice Eastwood 1940-3-28 7798 Inyo Titus Canyon Comment
  CAS-BOT-BC303821  Gnaphalium John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-23 54119 Plumas Quincy 1036 Comment
  RSA856  Gnaphalium chilense J. T. Howell 1927-7-21 453 Orange Santa Ana River bottom, Rancho Santa Ana. 152 Comment
  CAS-BOT-BC302507  Gnaphalium palustre John Thomas Howell 1958-7-23 33820 Fresno Simpson Meadow, Middle Fork of the Kings River 1828 Comment
  CAS-BOT-BC302666  Gnaphalium palustre John Thomas Howell 1939-8-10 15254 Siskiyou Sky High Valley, Marble Mts. 1828 Comment
  CAS-BOT-BC303193  Gnaphalium palustre John Thomas Howell 1940-8-2 15902 Tulare Slope north of Reflection Lake 3352 Comment
  CAS-BOT-BC307376  Gnaphalium palustre John Thomas Howell 1966-7-29 42016 Plumas Quincy, Sierra Nevada 1036 Comment
  RSA44446  Gnaphalium palustre J. T. Howell 1947-8-16 24145 Inyo Big Pine Lakes Trail. 2805 Comment
  CAS-BOT-BC304463  Grindelia hirsutula John Thomas Howell 1939-7-16 14854 Marin Between Mt. Theater and Bootjack, Mt. Tamalpais Comment
  CAS-BOT-BC304859  Grindelia hirsutula John Thomas Howell 1932-10-19 10862 Santa Cruz Mouth of Waddell Creek, 1.5 miles s. of San Mateo County line Comment
  CAS-BOT-BC304892  Grindelia hirsutula John Thomas Howell 1929-6-30 4313 Napa 5 mile s. of Calistoga on highway to St. Helena, Napa Valley Comment
  CAS-BOT-BC304901  Grindelia hirsutula J. T. Howell 1932-10-8 10804 Napa Napa River Comment
  CAS-BOT-BC305009  Grindelia hirsutula J. T. Howell 1929-12-5 4550 Stanislaus 1 1/2 miles se. of Modesto Comment
  CAS-BOT-BC314456  Grindelia hirsutula John Thomas Howell 1945-7-1 21265 Marin Tiburon Comment
  CAS-BOT-BC314583  Grindelia hirsutula John Thomas Howell 1933-9-17 11692 Solano Collinsville Comment
  UC526216  Grindelia hirsutula John Thomas Howell 1933-8-11 11489 San Francisco San Francisco , Presidio (Presidio) Comment
  UC897043  Grindelia hirsutula John Thomas Howell 1937-7-31 13720 Humboldt salt marsh bordering Humboldt Bay at Arcata; Humboldt Bay Comment
  CAS-BOT-BC304791  Grindelia hirsutula John Thomas Howell 1930-5-8 4752 Monterey Summit of San Juan Grade at San Benito-Monterey Co. line Comment
  CAS-BOT-BC305023  Grindelia hirsutula John Thomas Howell 1929-7-21 4347 Merced On Dry Creek at Merced River bottom Comment
  CAS-BOT-BC314436  Grindelia hirsutula John Thomas Howell 1946-6-20 22097 Marin Between Marin Beach and Stinson Beach Comment
  CAS-BOT-BC314625  Grindelia hirsutula John Thomas Howell 1934-6-16 12224 Shasta 3.5 miles NE of McArthur Comment
  GH417645  Grindelia hirsutula var. davyi J. T. Howell 1946-11-3 23033 Unknown Hamilton Field Comment
  GH417698  Grindelia stricta var. platyphylla J. T. Howell 1932-10-19 10862 Unknown mouth of Waddell Creek Comment
  UCR244688  Hackelia nervosa J. T. Howell, T. C. Fuller, G. D. Barbe 1981-6-24 54263 Plumas Sierra Nevada Mtns., C. 1.4 miles southeast [presumably on Mt. Hough Crystal Lake Rd.] of Mt. Hough on road to Quincy 1951 Comment
  GH8710  Haplopappus whitneyi subsp. discoideus J. T. Howell 1939-8-9 15236 Unknown Shackleford Creek Trail south of Sky High Valley, ca. 6000 feet., Marble Mts. Comment
  CAS-BOT-BC302203  Harmonia hallii John Thomas Howell 1943-5-11 18050 Lake 2.9 miles north of Middletown Comment
  CAS-BOT-BC306658  Helenium bigelovii John Thomas Howell 1924-6-13 405 Mariposa Bed of Merced River, Wawona 1219 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
  CAS-BOT-BC305399  Helianthus annuus John Thomas Howell 1950-11-9 27488 Kern Tejon Pass 1066 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
  CAS-BOT-BC313435  Hemizonella minima John Thomas Howell 1961-6-20 36543 Shasta Lassen Highway 1 mi. nw. of Lost Creek Bridge, Lassen Volcanic National Park 1798 Comment
  RSA608263  Hemizonia congesta J. T. Howell, J. W. Stacey 1936-7-26 12672 Sonoma Pitkin Marsh, 5 miles north of Sebastopol. Comment
  CAS-BOT-BC306031  Hemizonia congesta subsp. clevelandii John Thomas Howell 1961-9-23 36825 Plumas Indian Valley 1082 Comment
  CAS-BOT-BC306249  Hemizonia congesta subsp. lutescens John Thomas Howell 1944-9-24 20746 Marin Stinson Beach Comment
  CAS-BOT-BC309660  Hemizonia congesta subsp. lutescens John Thomas Howell 1930-9-14 5482 Mendocino 1 mile e. of Boonville Comment
  CAS-BOT-BC309835  Hemizonia congesta subsp. luzulifolia John Thomas Howell 1930-10-19 5612 Napa 1 mile east of Aetna Springs, Pope Valley Comment
  GH414568  Hemizonia plumosa J. T. Howell 1933-8-18 11572 Unknown 16 miles east of Jamesburg, Santa Lucia Mts. Comment
  POM181072  Hemizonia pungens subsp. pungens J. T. Howell 1930-9-28 5489 Contra Costa 2 miles from Concord on road to Walnut Creek. Comment
  POM194219  Hemizonia pungens subsp. pungens J. T. Howell 1929-10-26 4542 Napa 9 miles N of Vallejo. Comment
  CAS-BOT-BC388517  Herniaria hirsuta var. cinerea John Thomas Howell 1965-4-25 41066 Madera 5 miles northeast of Madera Comment
  CAS-BOT-BC388528  Herniaria hirsuta var. cinerea John Thomas Howell 1970-11-8 47512 Kern Bed of Lake Isabella, 6 miles from South Fork Kern River bridge on road from Weldon to Kernville 792 Comment
  CAS-BOT-BC55288  Hesperis matronalis John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-23 54124 Plumas Sierra Nevada. Quincy. On bank of Spanish Creek. 1036 Comment
  CAS-BOT-BC1195  Hesperolinon adenophyllum John Thomas Howell 1945-6-18 20980 Lake Near Glenbrook Comment
  RSA600936  Hesperomecon affine J. T. Howell 1936-3-29 12629 Alameda Tesla Hills Comment
  RSA35295  Hesperomecon linearis J. T. Howell 1944-6-11 19619 Santa Cruz 1 mile east of Felton. Comment
  SEINET10460727  Heterocodon rariflorum Howell 1940-5-12 Howell 15421 Marin Lagunitas Creek Comment
  CAS-BOT-BC310273  Heterotheca grandiflora John Thomas Howell; Gordon H. True 1978-4-4 52728 Solano Airport, Rio Vista Comment
  CAS-BOT-BC318882  Heterotheca grandiflora John Thomas Howell 1926-5-9 1976 Merced Miliken Bridge, Merced River Comment
  CAS-BOT-BC311068  Heterotheca oregona var. rudis John Thomas Howell 1937-7-18 13114 Lake 7 miles n. of Lower Lake Comment
  CAS-BOT-BC311117  Heterotheca oregona var. scaberrima John Thomas Howell 1931-9-6 8034 San Benito Bed of Tres Pinos River, 3 miles north of Paicines Comment
  CAS-BOT-BC311159  Heterotheca sessiliflora subsp. bolanderi John Thomas Howell 1925-9-12 1432 Alameda Oakland Hills Comment
  CAS-BOT-BC311211  Heterotheca sessiliflora subsp. echioides John Thomas Howell 1932-10-16 10837 Alameda 8 miles from Livermore on Tesla Road Comment
  CAS-BOT-BC310829  Heterotheca sessiliflora subsp. fastigiata John Thomas Howell 1962-9-25 38872 Kern Kernville 807 Comment
  CAS-BOT-BC318975  Heterotheca sessiliflora var. echioides John Thomas Howell 1927-8-18 3013 Monterey Arroyo Seco River, Santa Lucia Camp, Santa Lucia Mountains 609 Comment
  CAS-BOT-BC312316  Hieracium John Thomas Howell 1958-7-30 34104 Fresno West of Simpson Meadow, Middle Fork of the Kings River, Sierra Nevada 1813 Comment
  POM259365  Hieracium albiflorum J. T. Howell 1939-8-2 14895 Siskiyou Spirit Lake, Marble Mountains. 1829 Comment
  CAS-BOT-BC318669  Hieracium horridum John Thomas Howell 1946-7-22 22676 Fresno Mono Creek Canyon 3048 Comment
  CAS-BOT-BC49517  Hieracium scouleri John Thomas Howell 1934-6-11 11955 Modoc Parker Creek. 1584 Comment
  CAS-BOT-BC55349  Hirschfeldia incana John Thomas Howell 1962-5-21 37196 Kern Sierra Nevada. Northeast of Lake Isabella. 792 Comment
  CAS-BOT-BC55416  Hirschfeldia incana John Thomas Howell 1957-5-17 32248 San Francisco San Francisco. Bayview Hills. Comment
  CDA2184  Holcus lanatus J. T. Howell 1945-7-29 21355 Marin Bolinas. 0 Comment
  UCD98923  Hollisteria lanata John Thomas Howell 1958-5-21 33032 Kern 7 miles east of Bakerfield. 213 Comment
  UCR66555  Hollisteria lanata J. T. Howell 1948-6-14 24347 Kern Inner Coast Range, Cedar Canyon 610 Comment
  CAS-BOT-BC325869  Holocarpha heermannii John Thomas Howell 1957-6-23 32704 Kern Edison Comment
  CAS-BOT-BC320261  Holocarpha obconica John Thomas Howell 1930-9-28 5500 Contra Costa 6.3 miles from Byron on the Marsh Creek Road Comment
  CAS-BOT-BC320305  Holocarpha virgata John Thomas Howell 1956-9-13 31876 Marin Lagunitas Meadows near Lake Lagunitas Comment
  CAS-BOT-BC320368  Holocarpha virgata John Thomas Howell 1927-8-6 2957 San Diego On the mesa north of Old Town and San Diego 91 Comment
  CAS-BOT-BC320347  Holocarpha virgata John Thomas Howell 1930-10-5 5536 Solano 4 miles east of Rio Vista Junction on road to Suisun Comment
  RSA44228  Holodiscus microphyllus J. T. Howell 1947-8-3 23702 Inyo Fifth Lake, Big PIne Lakes. 3354 Comment
  CAS-BOT-BC147756  Holodiscus microphyllus var. microphyllus John Thomas Howell; Gordon H. True 1970-6-24 46691 Tulare Summit of North Manter Pass, Big Meadow to Manter Meadow, Kern Plateau 2499 Comment
  CAS-BOT-BC152752  Holodiscus microphyllus var. microphyllus John Thomas Howell 1949-7-30 25921 Tulare Volcanic cone at Tunnel 2926 Comment
  CAS-BOT-BC311888  Holozonia filipes John Thomas Howell 1930-10-12 5583 El Dorado Bed of North Fork of Cosumnes River, 6.5 miles n. of Plymouth Comment
  RSA92239  Holozonia filipes J. T. Howell 1945-8-12 21372 Marin Rock Spring, Mt Tamalpais Comment
  CAS-BOT-BC281257  Hordeum brachyantherum subsp. brachyantherum John Thomas Howell 1933-5-14 11229 Contra Costa St. Mary's College Comment
  CAS-BOT-BC284599  Hordeum brachyantherum subsp. brachyantherum John Thomas Howell 1941-7-31 16557 Madera Agnew Pass Trail Comment
  CAS-BOT-BC289302  Hordeum brachyantherum subsp. brachyantherum John Thomas Howell; Gordon H. True 1967-9-19 43847 Tulare Kern River South Fork, Kennedy Meadows Campground, Kern Plateau, Sierra Nevada 1859 Comment
  CAS-BOT-BC284948  Hordeum brachyantherum subsp. californicum John Thomas Howell 1957-5-19 32365 Stanislaus Del Puerto Canyon Comment
  CAS-BOT-BC289500  Hordeum brachyantherum subsp. californicum John Thomas Howell 1943-5-15 18068 Marin Tiburon Peninsula Comment
  CAS-BOT-BC284704  Hordeum jubatum John Thomas Howell 1960-8-20 36246 Tehama Near Lassen Volcanic National Park. Morgan 1463 Comment
  CAS-BOT-BC284728  Hordeum jubatum John Thomas Howell 1977-8-11 52697 Plumas At north end of Frenchmans Reservoir 1706 Comment
  CAS-BOT-BC285125  Hordeum marinum subsp. gussoneanum John Thomas Howell 1957-5-26 32474 San Francisco San Francisco. North base of Lone Mt. Comment
  CAS-BOT-BC289580  Hordeum marinum subsp. gussoneanum John Thomas Howell 1948-4-26 24287 Merced Near Los Banos Comment
  CAS-BOT-BC284829  Hordeum murinum subsp. glaucum John Thomas Howell; Gordon H. True 1969-5-13 45721 Kern Onyx 883 Comment
  CAS-BOT-BC289348  Hordeum murinum subsp. glaucum John Thomas Howell 1949-4-6 25294 Marin Hamilton Field Comment
  RSA51281  Hordeum murinum subsp. glaucum J. T. Howell 1949-4-24 25307 Marin Fort McDowell, Angel Island Comment
  UC905068  Hordeum murinum subsp. glaucum John Thomas Howell 1949-4-24 25307 Marin Fort McDowell Angel Island, Fort McDowell Comment
  CAS-BOT-BC289382  Hordeum murinum subsp. glaucum John Thomas Howell 1957-6-16 32657 San Francisco Third and Davidson Streets, San Francisco Comment
  RSA223640  Hordeum murinum subsp. glaucum J. T. Howell 1956-8-4 31744 San Francisco S. Van Ness Ave. at Market St. Comment
  CAS-BOT-BC289416  Hordeum murinum subsp. leporinum John Thomas Howell 1946-5-12 21764 Marin Between Fairfax and Meadows Club Comment
  CAS-BOT-BC289438  Hordeum murinum subsp. leporinum John Thomas Howell 1961-6-21 36620 Plumas Greenville, Sierra Nevada 1097 Comment
  RSA88555  Horkelia fusca subsp. parviflora J. T. Howell 1951-6-27 27594 Plumas McRae Meadow. 1982 Comment
  CAS-BOT-BC536225  Horkelia fusca var. parviflora John Thomas Howell 1939-8-8 15140 Siskiyou Between Marble Valley and Sky High Valley, Marble Mts. Comment
  CAS-BOT-BC144050  Horkelia rydbergii John Thomas Howell 1947-7-25 23642 San Bernardino East of Dry Lake, San Bernardino Mts. 2804 Comment
  CAS-BOT-BC143356  Horkelia tridentata John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-6-26 53061 Calaveras Near Dorrington 1524 Comment
  CAS-BOT-BC137353  Horkeliella purpurascens John Thomas Howell 1949-7-29 25872 Tulare Tunnel to Groundhog Meadow 2682 Comment
  UC1042549  Horkeliella purpurascens John Thomas Howell 1950-7-14 26819 Tulare Bakeoven Meadows; Sierra Nevada, South Fork of Kern River 2468 Comment
  CAS-BOT-BC315911  Hulsea algida John Thomas Howell 1949-8-9 26182 Tulare Cirque Peak 3733 Comment
  CAS-BOT-BC401244  Hypericum perforatum John Thomas Howell 1945-7-15 s.n. Marin Ridgecrest Rd., Fairfax Comment
  CAS-BOT-BC401391  Hypericum scouleri John Thomas Howell 1962-7-10 38499 Kern Shirley Meadows, Greenhorn Mountains 2011 Comment
  CAS-BOT-BC311567  Isocoma acradenia var. bracteosa John Thomas Howell 1970-11-7 47499 Kern Mouth of Kern River Canyon 213 Comment
  CAS-BOT-BC315713  Isocoma menziesii var. diabolica John Thomas Howell 1931-9-7 8075 San Benito San Benito River Canyon 8 miles nw. of Hernandez Comment
  CAS-BOT-BC57686  Isoetes bolanderi John Thomas Howell 1949-8-6 26080 Tulare Rock Creek 3200 Comment
  CAS-BOT-BC57709  Isoetes bolanderi John Thomas Howell 1944-8-17 20679 Tuolumne Near Parsons Lodge, Tuolumne Meadows Comment
  CAS-BOT-BC69994  Isoetes bolanderi John Thomas Howell 1946-7-16 22477 Inyo Between gem and long lakes. Rock Creek Lake Basin. Comment
  CAS-BOT-BC57738  Isoetes howellii John Thomas Howell 1937-6-6 13015 Sonoma Sebastopol Comment
  CAS-BOT-BC69876  Isoetes nuttallii John Thomas Howell 1940-3-17 15390 Marin Lagunitas Meadows. Comment
  RSA216124  Isolepis carinata J. T. Howell 1963-5-18 39322 Monterey 2.5 miles south of Aromas. 61 Comment
  CAS-BOT-BC112424  Isolepis cernua John Thomas Howell 1927-7-19 2799 Orange Moist shady situation, Santa Ana River bottom, Santa Ana Canyon. 152 Comment
  CAS-BOT-BC112530  Isolepis cernua John Thomas Howell 1956-8-26 31793 San Francisco Damp strand of Pine Lake. Comment
  RSA94  Isolepis cernua J. T. Howell 1927-7-6 278 Orange Santa Ana River bottom, Rancho Santa Ana 152 Comment
  CAS-BOT-BC324775  Iva axillaris John Thomas Howell 1970-9-26 47487 Kern Piute Springs 6 miles north of Loraine, Sierra Nevada 1158 Comment
  CAS-BOT-BC324817  Iva axillaris John Thomas Howell 1959-9-24 34972 Plumas Beckwourth, Sierra Nevada 1487 Comment
  CAS-BOT-BC158985  Ivesia saxosa John Thomas Howell 1963-8-20 40195 Inyo Whitney Portal Road - Sierra Nevada 2346 Comment
  SD147520  Ivesia unguiculata John Howell 1958-8-9 34252 Madera Miller Meadow 2103 Comment
  CAS-BOT-BC48200  Jamesia americana var. rosea John Thomas Howell 1951-7-17 27866 Tulare White Chief Trail 2895 Comment
  RSA84406  Jepsonia heterandra John T. Howell 1931-10-12 8151 Mariposa Merced River Canyon near Bagby Comment
  UCD141383  Juncus bufonius John Thomas Howell 1960-7-19 35705 Plumas Drakesbad, Lassen Volcanic National Park. 1676 Comment
  RSA54108  Juncus chlorocephalus J. T. Howell 1946-8-30 22908 El Dorado Upper Angora Lake Comment
  UC618438  Juncus covillei John Thomas Howell 1937-7-20 13147 Shasta near French Gulch Comment
  RSA40208  Juncus ensifolius J. T. Howell 1943-8-3 18954 Glenn Plaskett Meadows. 1829 Comment
  POM304570  Juncus orthophyllus J. T. Howell 1941-7-25 16457 Madera Agnew Meadows Comment
  RSA136750  Juncus patens J. T. Howell 1955-7-8 30628 Monterey Santa Lucia Camp, Arroyo Seco River. 610 Comment
  CAS-BOT-BC312665  Juncus tiehmii John Thomas Howell; T. C. Fuller; G. D. Barbe 1980-7-15 53801 Kern Kern Plateau, Pine Flat 2194 Comment
  CAS-BOT-BC80973  Juniperus californica John Thomas Howell 1970-9-24 47382 Kern 0.5 mile s. of summit of Bodfish-Havilah road 1097 Comment
  CAS-BOT-BC81016  Juniperus californica John Thomas Howell 1931-2-23 5748 Mariposa 6 miles from Coulterville on road to Bogby Comment
  RSA30  Juniperus occidentalis var. australis J. T. Howell 1927-7-10 370 A San Bernardino Big Bear Lake 2042 Comment
  A424476  Justicia californica J. T. Howell 1928-1-30 3306 Unknown two miles east of Shaver's Well, Colorado Desert Comment
  CAS-BOT-BC236825  Keckiella breviflora var. breviflora John Thomas Howell 1955-7-7 30561 Monterey Ridge southeast of Bear Mt., Santa Lucia Mountains 1371 Comment
  CAS-BOT-BC235688  Keckiella breviflora var. glabrisepala John Thomas Howell 1960-6-6 35389 Fresno Kings Canyon road, 4 mi. w. of Horseshoe Bend 1036 Comment
  RSA1321  Keckiella cordifolia J. T. Howell 1928-7-8 1055 Riverside Santa Ana Mountains above Glen Ivy 1067 Comment
  CAS-BOT-BC236906  Keckiella corymbosa John Thomas Howell 1937-7-31 13704 Trinity 11 miles west of Big Bar Comment
  CAS-BOT-BC238280  Keckiella rothrockii John Thomas Howell 1950-7-24 27316 Tulare Ridge s. of Monache Creek 3352 Comment
  NY790402  Keckiella rothrockii var. rothrockii J. T. Howell 1980-7-16 53880 Tulare Sherman Pass Road 2.5 miles northeast of the pass, in Trout Creek drainage, Kern Plateau. 2560.3 Comment
  JEPS12486  Kelloggia galioides John Thomas Howell 1925-6-29 1258 El Dorado Emerald Bay Lake Tahoe (Armstrong's) 1889 Comment
  UC1106120  Koeleria macrantha John Thomas Howell 1941-5-25 16212 Marin Rifle Camp Mt. Tamalpais (Mt. Tamalpais); , Rifle Camp Comment
  CAS-BOT-BC273782  Koeleria pyramidata John Thomas Howell; Catherine Best; Wilma Follette; Gordon True; Mary P. Wells 1981-5-14 53998 Sonoma Fairfield Osborn Preserve of the Nature Conservancy, 4.5 miles northeast of Penngrove on the west slope of Sonoma Mountain 457 Comment
  CAS-BOT-BC61425  Krameria bicolor John Thomas Howell; Martha Hilend 1928-4-15 171 Riverside Coachella Valley near Thousand Palms Comment
  JEPS40362  Kyhosia bolanderi John Thomas Howell 1926-7-31 Plumas near Prattville 1463 Comment
  CAS-BOT-BC340414  Lactuca biennis John Thomas Howell 1973-7-9 49705 Plumas Near Indian Falls, Indian Creek 914 Comment
  RSA219999  Lactuca saligna J. T. Howell 1963-9-4 40343 Monterey Along highway near P. G. and E. Co. generator, Moss Landing. Comment
  CAS-BOT-BC340509  Lactuca serriola John Thomas Howell 1960-8-20 36244 Tehama Near Lassen Volcanic National Park. Morgan 1463 Comment
  UC710613  Lactuca virosa John Thomas Howell 1943-8-22 19310 Contra Costa San Leandro Creek Canyon 243 Comment
  CAS-BOT-BC340702  Lactuca virosa John Thomas Howell 1954-9-8 30108 San Mateo Skyline Blvd. at San Andreas Lake, 2 miles west of San Bruno Comment
  CAS-BOT-BC341635  Lagophylla ramosissima John Thomas Howell 1926-10-9 2215 San Mateo Lake San Andreas Comment
  CAS-BOT-BC272438  Lamarckia aurea John Thomas Howell 1964-4-29 40687 Tuolumne At Tuolumne River Bridge, 2.5 miles east of Jacksonville, Sierra Nevada 198 Comment
  CAS-BOT-BC338268  Lasthenia californica John Thomas Howell 1926-3-27 1749 Napa Soscol Comment
  POM361516  Lasthenia californica J. T. Howell 1931-4-2 6051 Napa Wooden Valley Grade 4 miles E of Napa. Comment
  CAS-BOT-BC324949  Lasthenia californica subsp. bakeri John Thomas Howell 1947-4-30 23114 Marin Dillons Beach Comment
  UC1176888  Lasthenia californica subsp. macrantha John Thomas Howell 1939-6-4 Marin Point Reyes lighthouse Point Reyes Comment
  CAS-BOT-BC353482  Lasthenia fremontii John Thomas Howell 1954-5-16 29605 El Dorado Sierra Nevada, 4 miles W of Shingle Springs Comment
  CAS-BOT-BC353338  Lasthenia fremontii John Thomas Howell 1929-4-18 4164 Merced Dried bed of winter-pool, Merced. 51 Comment
  CAS-BOT-BC352791  Lasthenia glabrata subsp. glabrata John Thomas Howell 1933-4-1 10925 Sonoma Petaluma Comment
  CAS-BOT-BC366321  Lasthenia minor J. T. Howell 1936-5-21 2628 Mendocino Cleone Comment
  CAS-BOT-BC321782  Layia fremontii John Thomas Howell 1976-4-2 51557 Butte About 2 miles SE of Chico 60 Comment
  CAS-BOT-BC321794  Layia gaillardioides John Thomas Howell 1943-5-22 18141 Marin Fairfax hills Comment
  CAS-BOT-BC321086  Layia glandulosa John Thomas Howell 1958-5-23 33237 Inyo Alabama Hills 1463 Comment
  CAS-BOT-BC321462  Layia glandulosa John Thomas Howell 1962-5-21 37247 Kern West of Walker Pass summit 1584 Comment
  GH414645  Layia heterotricha J. T. Howell 1933-4-23 11156 Unknown 11 miles from Hernandez on road to San Benito Co. 609 Comment
  CAS-BOT-BC327238  Layia hieracioides John Thomas Howell 1944-4-30 19419 Alameda Oakland Hills above Mills College Comment
  CAS-BOT-BC372299  Layia platyglossa John Thomas Howell 1944-6-4 19553 Marin Inverness Ridge west of Inverness Comment
  CAS-BOT-BC379639  Layia platyglossa John Thomas Howell 1950-4-16 1605 San Francisco Sunset Beach State Park. Bluffs behind beach. Santa Cruz County Comment
  POM260852  Layia platyglossa subsp. campestris J. T. Howell 1940-5-19 15458 Napa Upper St. Helena Creek Comment
  CAS-BOT-BC534338  Lemna gibba John Thomas Howell 1926-6-11 2001 Merced Pool, 10 miles sw. of Merced Comment
  CAS-BOT-BC221479  Lepechinia calycina John Thomas Howell 1955-7-8 30640 Monterey On Arroyo Seco road near Escondido Camp, Santa Lucia Mts. 792 Comment
  RSA1076  Lepechinia cardiophylla J. T. Howell 1927-6-26 225 Orange Claymine Canyon, near Sierra Peak 610 Comment
  CAS-BOT-BC88937  Lepidium dictyotum John Thomas Howell 1931-3-17 5790 Kings 6 miles southwest of Stratford. Tulare Lake bottom. Comment
  CAS-BOT-BC89105  Lepidium didymum John Thomas Howell 1926-7-13 2067 San Francisco San Francisco. Lone Mountain. Comment
  CAS-BOT-BC89086  Lepidium didymum John Thomas Howell 1940-5-20 s.n. Marin Point Reyes Lighthouse. Comment
  CAS-BOT-BC12559  Lepidium nitidum John Thomas Howell 1933-3-26 10892 San Joaquin Corral Hollow. Comment
  CAS-BOT-BC12761  Lepidium oxycarpum John Thomas Howell 1930-4-4 4652 Alameda Bordering San Francisco Bay, 4 miles west of Decoto. Comment
  CAS-BOT-BC12794  Lepidium perfoliatum John Thomas Howell 1944-5-28 19512 Marin Between Manzanita and Almonte. Comment
  PGM899  Lepidium strictum J. T. Howell 1971-4-15 Monterey Monterey Peninsula, Pacific Grove, 19th & Laurel Sts (in pathway) Comment
  CAS-BOT-BC272394  Leptochloa fusca subsp. uninervia John Thomas Howell; Gordon H. True 1967-7-6 43201 Tulare Across Road 160 at SW corner near vernal pool natural area in Valley Grassland about 4 1/2 miles east-northeast of Pixley 83 Comment
  CAS-BOT-BC272416  Leptochloa fusca subsp. uninervia John Thomas Howell 1927-9-30 3127 Los Angeles In bed of Los Angeles River east of Griffith Park Comment
  GH414061  Lessingia germanorum J. T. Howell 1937-5-20 12958 Unknown 5 miles north of the Pinnacles Comment
  POM197776  Lessingia germanorum John T. Howell 1926-11-7 2233 San Francisco Lake Merced Comment
  UC473579  Lessingia germanorum John Thomas Howell 1931-9-26 8126 San Francisco Presidio San Francisco Comment
  CAS-BOT-BC339410  Lessingia glandulifera var. glandulifera John Thomas Howell 1927-7-9 2673 San Bernardino Between Deadmans Point and Box S Ranch, Mojave Desert Comment
  JEPS20566  Lessingia glandulifera var. glandulifera John Thomas Howell 1928-10-14 4080 San Bernardino near Fontana Comment
  JEPS20573  Lessingia glandulifera var. glandulifera John Thomas Howell 1927-8-2 2909 Riverside at Idyllwild (Strawberry Valley, Mt. San Jacinto); Mt. San Jacinto, Strawberry Valley Comment
  CAS-BOT-BC339648  Lessingia leptoclada John Thomas Howell 1971-7-12 48333 Kern West slope of Greenhorn Range 3 miles east of Glennville 1219 Comment
  UCR88022  Lessingia leptoclada J. T. Howell 1962-9-26 38933 Kern Sierra Nevada Mtns., 5.5 mi west of Summit on rd to Glennville 1463 Comment
  CAS-BOT-BC339667  Lessingia leptoclada John Thomas Howell 1931-10-10 8127 Mariposa 7 miles from Mariposa on road to Cathay Valley Comment
  RSA91159  Lessingia nemaclada John T. Howell 1931-10-11 8134 Mariposa Mormon Bar Hill Comment
  CAS-BOT-BC341954  Lessingia pectinata var. pectinata John Thomas Howell 1927-8-18 3020 Monterey About 4 miles east of Monterey on road to Salinas Comment
  JEPS20556  Lessingia pectinata var. pectinata John Thomas Howell 1927-8-18 3020 Monterey about 4 mi e Monterey (on road to Salinas) Comment
  CAS-BOT-BC342029  Lessingia ramulosa John Thomas Howell 1927-8-24 3052 Lake On Pope Valley-Middleton road, 8 miles ese. of Middleton Comment
  CAS-BOT-BC330397  Lessingia tenuis John Thomas Howell 1928-5-27 3859 Kern Near Cuddy's Ranch, Mt. Pinos region Comment
  CAS-BOT-BC342083  Leucanthemum vulgare John Thomas Howell 1961-6-21 36653 Plumas Greenville 1097 Comment
  CAS-BOT-BC444054  Lewisia cotyledon var. cotyledon John Thomas Howell 1937-7-24 13438 Siskiyou Caribou Basin, Salmon-Trinity Alps 2286 Comment
  GH376984  Lewisia disepala J. T. Howell 1940-6-1 15573 Unknown Between Snow Creek and Mt. Watkins ridge Comment
Read comments
Apr 9 2019
  CAS-BOT-BC444292  Lewisia pygmaea John Thomas Howell 1941-7-24 16439 Madera Near Garnet Lake 2956 Comment
  CAS-BOT-BC444561  Lewisia triphylla John Thomas Howell 1960-7-21 35815 Plumas Lassen Volcanic National Park. Near Terminal Geyser 1828 Comment
  CAS-BOT-BC444586  Lewisia triphylla John Thomas Howell 1942-8-3 17616 Tulare Between Little Five Lakes and Kaweah Gap Comment
  CAS-BOT-BC436553  Ligusticum californicum John Thomas Howell 1936-8-26 12800 Trinity Tanble Blue Creek, Scott Mts. Comment
  CAS-BOT-BC436062  Ligusticum grayi John Thomas Howell 1944-8-8 20109 Tuolumne Bank of Clavey River, near Forest Service Road 3N21, Stanislaus National Forest 1804 Comment
  GH404463  Ligusticum grayi J. T. Howell 1937-7-25 13461 Unknown Caribou Basin, Salmon-Trinity Alps 1981 Comment
  CAS-BOT-BC451679  Lilaea scilloides John Thomas Howell 1930-5-21 5194 Santa Clara 1 mile south of Morgan Hill Comment
  CAS-BOT-BC130582  Lilium humboldtii John Thomas Howell 1927-7-26 2841 Orange SE. fork of Claymine [Canon] Canyon, n. Santa Ana Mts. 304 Comment
Read comments
Mar 27 2018
  CAS-BOT-BC509305  Lilium kelleyanum John Thomas Howell 1941-8-3 16740 Madera Near Garnet Lake 2956 Comment
  CAS-BOT-BC509390  Lilium kelleyanum John Thomas Howell 1937-7-20 13148 Trinity Van Ness Creek Comment
  CAS-BOT-BC509426  Lilium kelleyanum John Thomas Howell 1958-7-22 33758 Fresno Simpson Meadow, Middle Fork of the Kings River 1828 Comment
  CAS-BOT-BC509457  Lilium kelleyanum John Thomas Howell 1940-8-5 16007 Tulare Between East Lake and Reflection Lake Comment
  UC1106309  Limnanthes douglasii John Thomas Howell 1946-4-18 21677 Marin Novato Comment
  CAS-BOT-BC246058  Limosella aquatica John Thomas Howell 1930-5-21 5196 Santa Clara 1 mile south of Morgan Hill Comment
  CAS-BOT-BC198040  Linanthus harknessii John Thomas Howell 1934-6-12 12031 Modoc Plum Valley. Comment
  CAS-BOT-BC425337  Lithophragma affine John Thomas Howell 1935-4-11 12595 Alameda Brushy Canyon near Tesla Comment
  CAS-BOT-BC430955  Lithophragma bolanderi John Thomas Howell 1954-5-16 29595 El Dorado 4 miles west of Shingle Springs Comment
  CAS-BOT-BC431106  Lithophragma bolanderi John Thomas Howell 1951-7-19 27971 Tulare Monarch Lakes Trail 2590 Comment
  CAS-BOT-BC432307  Lithophragma campanulatum John Thomas Howell 1944-7-13 19729 Glenn Plaskett Meadows Comment
  CAS-BOT-BC174455  Loeflingia squarrosa John Thomas Howell 1931-3-18 5814 Fresno Jocalitos Canyon, 4 miles s. of Coalinga Comment
  CAS-BOT-BC174515  Loeflingia squarrosa John Thomas Howell 1958-4-27 33017 San Benito 5 miles n. of Pinnacles Comment
  SD71340  Loeflingia squarrosa John Thomas Howell 1958-4-27 33017 San Benito 5.0 miles north of Pinnacles. Comment
  CAS-BOT-BC342210  Logfia filaginoides John Thomas Howell 1943-4-11 17899 Marin Black Canyon, San Rafael hills Comment
  CAS-BOT-BC342208  Logfia filaginoides John Thomas Howell 1965-4-26 41228 Madera 4.7 miles south of Northfork 609 Comment
  CAS-BOT-BC342393  Logfia gallica John Thomas Howell 1965-4-25 41048 Madera 1.5 mile north-west of Madera 82 Comment
  CAS-BOT-BC283305  Lolium multiflorum John Thomas Howell; Gordon H. True 1967-5-31 42535 Tulare About 4.5 miles ENE of Pixley, from SW corner of area 83 Comment
  CAS-BOT-BC283390  Lolium multiflorum John Thomas Howell 1961-9-22 36714 A Butte On bank of Feather River, Oroville 53 Comment
  CAS-BOT-BC283472  Lolium multiflorum John Thomas Howell 1963-5-18 39325 Monterey 2.5 miles S of Aromas 60 Comment
  UC640624  Lomatium engelmannii John Thomas Howell 1937-7-29 13656 Siskiyou between Trinity & Siskiyou co.'s Scott Mt. Comment
  SD130534  Lonicera conjugialis John Thomas Howell 1958-8-14 34433 Madera East Fork of Granite Creek; north of Sadler Lake. 3050 Comment
  CAS-BOT-BC240695  Lonicera interrupta John Thomas Howell 1961-9-22 36780 Butte Jarbo Gap, Feather River Highway Comment
  GH422935  Lonicera interrupta J. T. Howell & G. H. True 1966-7-13 41880 Unknown Canyon of Poison Meadow Creek on Cherry Hill Road. Kern Plateau 2011 Comment
  CAS-BOT-BC234815  Lonicera subspicata John Thomas Howell 1927-10-16 3157 Los Angeles On trail from Santa Anita Canon [Canyon] to Sierra Madre, San Gabriel Mts. Comment
  CAS-BOT-BC448348  Lorandersonia peirsonii John Thomas Howell 1946-7-28 22814 Inyo Rock Creek Lake Basin, Long Lake 3230 Comment
  CAS-BOT-BC198560  Lotus John Thomas Howell 1928-3-11 s.n. San Bernardino At eastern end of Morongo Valley. 914 Comment
  RSA118041  Lotus grandiflorus var. grandiflorus J. T. Howell 1955-7-7 30432 Monterey Granitic summit of Junipero Serra Peak., Santa Lucia Mts. 1768 Comment
  UC1177191  Lotus humistratus John Thomas Howell 1944-5-28 19513 Marin between Manzanita and Almonte Comment
  UC517492  Lotus procumbens var. procumbens John Thomas Howell 1933-6-29 11407 San Bernardino Summit of Cajon Pass Comment
  CAS-BOT-BC181941  Lotus purshianus var. purshianus John Thomas Howell 1934-6-30 12295 Modoc Duncan Horse Camp. 1355 Comment
  UCD106704  Lotus uliginosus John Thomas Howell 1944-7-30 19856 Marin Between Mill Valley and head of salt marshes. 3 Comment
  UC1177185  Lotus wrangelianus John Thomas Howell 1940-5-12 Marin San Anselmo Canyon Comment
  GH404271  Lupinus J. T. Howell 1976-4-1 51520 Unknown Table Mountain, 4-5 miles north of Oroville 152 Comment
  CAS-BOT-BC208751  Lupinus argenteus var. heteranthus John Thomas Howell 1934-7-10 12560 Lassen Black's Mt. Comment
  CAS-BOT-BC215092  Lupinus chamissonis John Thomas Howell 1957-5-28 32479 San Francisco W side of Lone Mountain Comment
  CAS-BOT-BC205431  Lupinus excubitus var. austromontanus John Thomas Howell; Gordon H. True 1968-5-14 44445 Tulare Cherry Hill Road, Brush Creek Canyon, Kern Plateau 1310 Comment
  UC1177228  Lupinus formosus John Thomas Howell 1939-5-21 14703 Marin e side Tiburon Peninsula; e side of Tiburon Peninsula Comment
  UC517560  Lupinus formosus John Thomas Howell 1928-3-20 3473 Los Angeles Griffith Park Los Angeles, , Vermont Canyon (Vermont Canyon, Los Angeles) Comment
  RSA595066  Lupinus fulcratus var. fulcratus J. T. Howell 1958-8-16 34484 Madera On trail to Sadler Lake, near Isberg Lake. 2866 Comment
  GH369029  Lupinus gracilentus J. T. Howell 1944-8-14 20453 Unknown Tuolumne Canyon above Glen Aulin Comment
  RSA410  Lupinus latifolius subsp. parishii J. T. Howell 1927-7-10 375 San Bernardino Big Bear, San Bernardino Mountains. 1829 Comment
  UCD108579  Lupinus lepidus var. sellulus John Thomas Howell 1961-6-19 36547 Shasta Lassen Volcanic National Park. Anklin Meadows. 1874 Comment
  SEINET8128161 Image available Lupinus lyallii var. danaus J. T. Howell 1941-1 16421 Unknown Comment
  CAS-BOT-BC8365  Lupinus marinensis John Thomas Howell 1938-5-22 13787 Marin San Anselmo Canyon Comment
  CAS-BOT-BC8216  Lupinus oreocharis John Thomas Howell 1942-7-29 17392 Tulare Little Five Lakes Basin Comment
  RSA414238  Lupinus pratensis J. T. Howell 1948-7-30 25195 Tulare John Muir Trail west of Center Peak 3201 Comment
  SEINET10488906  Lupinus sellulus John Thomas Howell 1963-7-11 Howell 39830 Nevada In gravelly soil near truckee. Comment
  SD147556  Lupinus spectabilis John Thomas Howell 1954-5-19 29888 Mariposa Serpentine 5 miles northwest of Bagby Comment
  SD147555  Lupinus stiversii John Thomas Howell 1960-6-6 35331 Fresno Kings Canyon, Copper Creek Trail 1676 Comment
  CAS-BOT-BC7533  Lupinus tegeticulatus John Thomas Howell 1928-5-26 3850 Ventura Mt. Pinos 2682 Comment
  CAS-BOT-BC436565  Luzula cascadensis John Thomas Howell 1948-7-22 24858 Fresno Bubbs Creek Canyon in vicinity of Vidette Meadows 3048 Comment
  RSA40227  Luzula comosa J. T. Howell 1943-8-3 18983 Glenn Plaskett Meadows. 1829 Comment
  CAS-BOT-BC436674  Luzula comosa var. laxa John Thomas Howell 1960-7-20 35739 Plumas Lassen Volcanic National Park: Boiling Springs Lake to Drakesbad 1828 Comment
  CAS-BOT-BC236930  Luzula orestera John Thomas Howell 1940-8-1 15839 Tulare Between Reflection Lake and Harrison Pass 3505 Comment
  CAS-BOT-BC231490  Lycium brevipes var. hassei John Thomas Howell 1927-11-25 3210 San Diego Central part of Borrego Valley, w. Colorado Desert 182 Comment
  RSA656  Lycopus americanus J. T. Howell 1927-9-24 753 Orange Santa Ana River Bottom, Rancho Santa Ana 152 Comment
  CAS-BOT-BC342631  Madia anomala John Thomas Howell 1943-5-22 18136 Marin Fairfax hills Comment
  UC750717  Madia anomala John Thomas Howell 1946-5-25 21932 Marin Greenbrae Hills Comment
  CAS-BOT-BC344116  Madia elegans John Thomas Howell 1950-7-13 26762 Tulare Bakeoven Meadows, South Fork of Kern River 2468 Comment
  CAS-BOT-BC344175  Madia elegans John Thomas Howell; Gordon H. True 1967-7-4 42999 Tulare 3.4 miles south of Troy Meadow, Kern Plateau 2286 Comment
  CAS-BOT-BC343766  Madia elegans John Thomas Howell 1930-9-14 5481 Mendocino 9 miles west of Boonville Comment
  CAS-BOT-BC344158  Madia elegans John Thomas Howell; R. C. Barneby 1954-5-8 29225 Tulare Tule River Canyon, 11.5 miles above Springville 792 Comment
  RSA40194  Madia elegans subsp. elegans J. T. Howell 1943-8-7 s.n. Glenn Plaskett Meadows. 1829 Comment
  CAS-BOT-BC343176  Madia gracilis John Thomas Howell 1963-5-6 39086 Monterey Santa Lucia Mountains. 4 miles south of King City on road to Jolon 121 Comment
  CAS-BOT-BC343237  Madia gracilis John Thomas Howell 1943-7-15 18362 Nevada Boreal Ridge, West side of Donner Pass near Norden 2133 Comment
  CAS-BOT-BC334723  Madia gracilis John Thomas Howell 1930-5-21 5188 San Benito North slope of San Juan Grade Comment
  CAS-BOT-BC324522  Madia radiata John Thomas Howell 1938-4-10 13753 San Joaquin Hospital Canyon Comment
  CAS-BOT-BC324496  Madia radiata John Thomas Howell 1931-3-18 5855 Fresno Head of Oil Canyon Comment
  CAS-BOT-BC345092  Madia sativa John Thomas Howell 1964-6-29 40839 San Luis Obispo Near St. Paul's Episcopal Church, Cambria Comment
  CAS-BOT-BC511338  Maianthemum racemosum subsp. amplexicaule John Thomas Howell 1956-3-27 31242 A Monterey Santa Lucia Mountains, Bixby Creek Canyon Comment
  CAS-BOT-BC514209  Maianthemum stellatum John Thomas Howell 1942-7-26 17235 Tulare Mineral King Comment
  CAS-BOT-BC203998  Malacothamnus fremontii John Thomas Howell; Thos. H. Kearney 1950-8-29 27434 a Inyo Along road from Independence to Onion Valley 2590 Comment
  CAS-BOT-BC204045  Malacothamnus fremontii John Thomas Howell 1957-5-19 32355 Stanislaus Del Puerto Canyon Comment
  CAS-BOT-BC206331  Malacothamnus fremontii John Thomas Howell; T. H. Kearney 1950-7-5 26635 Contra Costa Nortonville. Comment
  UC1177002  Malacothamnus fremontii John Thomas Howell 1953-4-26 28932 San Joaquin Corral Hollow Comment
  UC961415  Malacothamnus fremontii John Thomas Howell and T. H. Kearney 1950-7-5 26635 Contra Costa Nortonville Comment
  UC961416  Malacothamnus marrubioides John Thomas Howell 1950-11-9 27485 Los Angeles 12 mi n Castaic 609 Comment
  CAS-BOT-BC323287  Malacothrix John Thomas Howell 1928-5-19 3795 Ventura Anacapa Island Comment
  CAS-BOT-BC345302  Malacothrix californica John Thomas Howell 1962-5-20 37101 Kern Kernville 807 Comment
  CAS-BOT-BC345403  Malacothrix clevelandii John Thomas Howell 1962-7-8 s.n. Kern Black Mt. south side, Greenhorn Mountains 1417 Comment
  CAS-BOT-BC345438  Malacothrix clevelandii John Thomas Howell 1953-6-14 29071 Monterey Hastings Reservation, Santa Lucia Mts. Comment
  CAS-BOT-BC347526  Malacothrix floccifera John Thomas Howell; Walter Knight; Irja Knight; Gordon True 1967-6-12 1977 Plumas Butterfly Botanical Area and Vicinity. In valley proper 1036 Comment
  CAS-BOT-BC347835  Malacothrix saxatilis var. commutata John Thomas Howell 1930-10-24 5640 Monterey 17.2 miles east of The Indians, Santa Lucia Mts. Comment
  CAS-BOT-BC347914  Malacothrix saxatilis var. tenuifolia John Thomas Howell 1931-6-6 6667 A Los Angeles 17 miles s. of Sandberg's Summit, Ridge Route Comment
  CAS-BOT-BC540140  Malus pumila John Thomas Howell 1950-11-4 35106 Marin Single roadside seedling, Frank Valley Comment
  CAS-BOT-BC348188  Matricaria discoidea John Thomas Howell 1957-5-17 32246 San Francisco San Francisco. Bayview Hills Comment
  RSA96894  Medicago praecox J. T. Howell 29188 Tehama Dibble Creek, 1.5 miles north of Red Bluff. Comment
  RSA398  Medicago sativa J. T. Howell 1927-7-27 498 Orange Near ranch, Rancho Santa Ana 152 Comment
  CAS-BOT-BC269223  Melica aristata John Thomas Howell 1960-7-17 35486 Plumas Lassen Volcanic National Park. Drakesbad 1828 Comment
  CAS-BOT-BC271170  Melica aristata John Thomas Howell 1943-8-5 19094 Glenn Canyon of Snow Basin Creek Comment
  CAS-BOT-BC271731  Melica californica John Thomas Howell; Gordon H. True 1969-5-14 45768 Tulare On wall of Kern River Canyon east of Limestone Forest Service camp, Kern Plateau, Sierra Nevada 1127 Comment
  CAS-BOT-BC282089  Melica fugax John Thomas Howell; et al. 1967-6-12 1953 Plumas Butterfly Botanical Botanical Area and Vicinity. Fern Glen 1097 Comment
  CAS-BOT-BC282163  Melica geyeri John Thomas Howell 1940-5-19 15448 Napa Upper St Helena Creek Comment
  UC1106141  Melica geyeri John Thomas Howell 1941-5-25 16227 Marin Potrero Meadow; 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-BC280942  Melica imperfecta John Thomas Howell 1962-5-22 37267 Tulare Kern River Canyon, above Roads End 1097 Comment
  CAS-BOT-BC281542  Melica imperfecta John Thomas Howell 1972-4-24 48694 Mariposa El Portal 640 Comment
  CAS-BOT-BC281062  Melica stricta John Thomas Howell 1958-5-24 33296 Inyo Whitney Portal Rd 2255 Comment
  GH360402  Melica stricta J. T. Howell 1943-7-18 18527 Unknown Castle Peak Comment
  CAS-BOT-BC262506  Melica torreyana John Thomas Howell 1933-5-14 11257 Contra Costa Hills east of St. Mary's College Comment
  CAS-BOT-BC262513  Melica torreyana John Thomas Howell 1943-5-11 18053 Lake 2.9 miles north of Middletown Comment
  CAS-BOT-BC262550  Melica torreyana John Thomas Howell; Catherine Best; Gordon H. True 1982-5-6 54695 Sonoma Bouverie Audubon Preserve, about 1.5 miles east of Glen Ellen near Stuart Creek 137 Comment
  RSA0121878  Mentzelia dispersa J. T. Howell 1934-6-12 12042 Modoc North side of Fandango Valley. Comment
  CAS-BOT-BC167676  Mentzelia veatchiana John Thomas Howell; Gordon H. True 1967-5-30 42466 Tulare About 1.5 miles from Lamont Meadow on road to Long Valley, Kern Plateau 1737 Comment
  CAS-BOT-BC170876  Mentzelia veatchiana John Thomas Howell 1962-5-20 37109 Kern Kernville - Sierra Nevada 807 Comment
  CAS-BOT-BC428773  Micranthes californica John Thomas Howell; Gordon H. True; Barbara T. Menzies; Roberta Shockey 1978-4-5 52770 Calaveras Camp Nine Road northeast of Vallecito. 609 Comment
  CAS-BOT-BC428995  Micranthes fragosa John Thomas Howell 1944-7-13 19748 Glenn Summit ridge north of Black Butte Comment
  CAS-BOT-BC429063  Micranthes nidifica John Thomas Howell 1942-8-5 17726 Tulare Kaweah Meadows, Chagoopa Plateau Comment
  CAS-BOT-BC429096  Micranthes odontoloma John Thomas Howell 1960-8-19 36128 Tehama Lassen Volcanic National Park. Brokeoff Mt. Trail 2346 Comment
  CAS-BOT-BC429189  Micranthes oregana John Thomas Howell 1934-6-14 12141 Modoc Near Lost Lake, Warner Mts. 2438 Comment
  CAS-BOT-BC322601  Micropus amphibolus John Thomas Howell 1946-5-16 21871 Marin S. side, Angel Island Comment
  CAS-BOT-BC348703  Microseris acuminata John Thomas Howell; Gordon H. True 1967-5-7 42172 Butte Northwest outskirts of Oroville north of the Feather River Comment
  CAS-BOT-BC348775  Microseris bigelovii John Thomas Howell 1957-5-28 32511 San Francisco San Francisco. Nw. side of Lone Mt. Comment
  CAS-BOT-BC348758  Microseris bigelovii John Thomas Howell 1929-5-26 4243 Mendocino Open flats of Mendocino coastal plain, Fort Bragg 15 Comment
  CAS-BOT-BC348839  Microseris douglasii subsp. douglasii John Thomas Howell 1943-5-11 18014 Lake 1 mile south of Lakeport Comment
  CAS-BOT-BC349203  Microseris elegans John Thomas Howell 1966-3-29 41456 Tulare About 4 1/2 miles east-northeast of Pixley 83 Comment
  CAS-BOT-BC9736  Mimulus deflexus John Thomas Howell 1949-7-18 25465 Inyo Cottonwood Lakes 3352 Comment
  POM204109  Mimulus layneae J. T. Howell 1934-7-4 12398 Siskiyou SE corner of Siskiyou County Comment
  JEPS48078  Mimulus leptaleus John Thomas Howell 1963-7-12 39841 El Dorado Myers 1935 Comment
  RSA88391  Mimulus nanus var. mephiticus J. T. Howell 1951-6-29 27753 Plumas Feather River Canyon 549 Comment
  CAS-BOT-BC10851  Mimulus suksdorfii John Thomas Howell 1949-7-18 25468 Inyo Cottonwood Lakes 3383 Comment
  CAS-BOT-BC174544  Minuartia californica John Thomas Howell 1960-6-7 35418 Fresno Kings Canyon road 6.5 mi. ne. of Cherry Gap 1554 Comment
  RSA54056  Minuartia californica J. T. Howell 1948-4-18 24207 Sonoma Hills east of Agua Caliente. Comment
  CAS-BOT-BC384006  Mirabilis jalapa John Thomas Howell 1973-11-4 50322 Monterey King City 100 Comment
  CAS-BOT-BC432966  Mitella breweri John Thomas Howell 1924-7-28 527 Mariposa Johnson Lake, Yosemite Park Comment
  UCD99640  Mollugo verticillata John Thomas Howell 1970-9-22 47459 Kern bed of Lake Isabella (east side of north arm), about 5 miles south of Kernville. 792 Comment
  CAS-BOT-BC213929  Monardella odoratissima subsp. pallida John Thomas Howell 1970-9-23 47344 Kern Near Tiger Flat, east side of Sunday Peak, Greenhorn Mountains, Sierra Nevada 1981 Comment
  CAS-BOT-BC222145  Monardella odoratissima subsp. pallida John Thomas Howell 1946-7-14 22291 Inyo Mosquito Flat, Rock Creek Lake Basin 3139 Comment
  RSA401649B  Monardella odoratissima subsp. pallida J. T. Howell 1948-7-31 25244 Inyo Kearsarge Pass Trail. 2896 Comment
  CAS-BOT-BC220395  Monardella purpurea John Thomas Howell 1939-7-16 s.n. Marin Fern Canyon, Mt. Tamalpais Comment
  CAS-BOT-BC444773  Montia chamissoi John Thomas Howell 1942-8-5 17744 A Tulare Kaweah Meadows Comment
  CAS-BOT-BC444918  Montia fontana John Thomas Howell 1924-5-13 317 Mariposa Wawona Meadow 1219 Comment
  CAS-BOT-BC415958  Mucronea perfoliata John Thomas Howell 1927-11-12 3195 Kern badlands north of Red Rock Canon 762 Comment
  CAS-BOT-BC263347  Muhlenbergia andina John Thomas Howell; Gordon H. True 1966-7-13 41942 Tulare Pipe Spring on Cherry Hill Road, west side of Big Meadow, Kern Plateau, Sierra Nevada 2377 Comment
  CAS-BOT-BC260591  Muhlenbergia filiformis John Thomas Howell 1970-9-22 47241 Kern Along Kern River between Kernville and River Kern 822 Comment
  CAS-BOT-BC264552  Muhlenbergia filiformis John Thomas Howell 1949-8-3 25978 Tulare Sky Blue Lake 3505 Comment
  CAS-BOT-BC275301  Muhlenbergia mexicana John Thomas Howell 1959-9-21 34746 Plumas Sand bars of Feather River, N Fork near Belden 701 Comment
  CAS-BOT-BC274952  Muhlenbergia richardsonis John Thomas Howell 1940-7-31 15758 Tulare East Lake 2926 Comment
  CAS-BOT-BC274977  Muhlenbergia richardsonis John Thomas Howell 1949-7-27 25817 Tulare Whitney Meadows 2956 Comment
  CAS-BOT-BC275003  Muhlenbergia richardsonis John Thomas Howell 1949-7-29 25890 Tulare Little Whitney Meadow 2590 Comment
  CAS-BOT-BC275083  Muhlenbergia richardsonis John Thomas Howell 1934-7-6 12449 Lassen Harvey Valley Comment
  CAS-BOT-BC275091  Muhlenbergia richardsonis John Thomas Howell 1941-8-1 16647 Madera Near Garnet Lake 2956 Comment
  CAS-BOT-BC392248  Myosurus John Thomas Howell 1978-4-17 s.n. Butte Table Mountain 381 Comment
  CAS-BOT-BC83226  Myosurus minimus John Thomas Howell; Gordon H. True 1972-5-12 7130 Nevada Boca-Stampede Dam Road, 5.2 miles north of Boca. 1767 Comment
  UC1026499  Myosurus sessilis John Thomas Howell 1931-3-29 66014 San Benito 1.5 mi se San Benito Comment
  UCD87432  Nassella cernua John Thomas Howell 1930-5-11 4827 San Diego Henshaw Dam. Comment
  CAS-BOT-BC259933  Nassella lepida John Thomas Howell 1945-5-27 20881 Marin E of Mountain Theater, Mount Tamalpais Comment
  CAS-BOT-BC259942  Nassella lepida John Thomas Howell 1946-5-16 21896 Marin N side of Angel Island Comment
  RSA70  Nassella lepida J. T. Howell 1927-6-9 65 Orange Botany Garden, Rancho Santa Ana. 152 Comment
  CAS-BOT-BC260149  Nassella pulchra John Thomas Howell 1941-5-25 16211 Marin Rifle Camp, Mount Tamalpais Comment
  CAS-BOT-BC260166  Nassella pulchra John Thomas Howell 1938-5-22 13794 Marin San Anselmo Canyon Comment
  POM203918  Nassella pulchra J. T. Howell 1933-5-28 11378 Alameda Little Grizzley, Berkeley Hills Comment
  CAS-BOT-BC60339  Nasturtium officinale John Thomas Howell 1924-6-14 408 Mariposa Stream in Wawona Meadow. Comment
  GH385263  Navarretia cotulifolia J. T. Howell 1937-7-18 13107 Unknown near Middletown Comment
  RSA73730  Navarretia cotulifolia J. T. Howell 1939-4-30 14626 Napa Walter Springs. Comment
  RSA99648  Navarretia eriocephala J. T. Howell 1953-5-24 s.n. Tuolumne Near Chinese Camp. 381 Comment
  CAS-BOT-BC230320  Navarretia jepsonii John Thomas Howell 1937-7-18 13106 Lake Near Middletown Comment
  SEINET12271290  Navarretia mellita J. T. Howell 1938-1 13938 Contra Costa head of Siesta Valley Comment
  RSA73126  Navarretia nigelliformis subsp. radians J. T. Howell 1937-5-20 12962 San Benito 12 miles south of Paicines Comment
  CAS-BOT-BC232654  Navarretia pubescens John Thomas Howell 1930-8-24 5440 Lake 4 miles from Middletown on Adams Spring Road Comment
  RSA26221  Navarretia subuligera J. T. Howell 1940-5-19 15462 Napa Upper St. Helena Creek. Comment
  SEINET10906128  Nemacladus interior John Thomas Howell, Rupert C. Barneby 1954-5-11 Howell 29415 Madera Burn, 2 miles west of Oakhurst 671 Comment
  RSA615  Nemophila menziesii J. T. Howell 1928-3-18 881 San Bernardino Aliso Canyon, Rancho Santa Ana. 244 Comment
  CAS-BOT-BC219398  Nemophila parviflora John Thomas Howell 1944-7-13 19733 Glenn Plaskett Meadows Comment
  CAS-BOT-BC140357  Oemleria cerasiformis John Thomas Howell 1925-2-8 745 Alameda Strawberry [Canon] Canyon, Berkeley Hills Comment
  CAS-BOT-BC56884  Opuntia polyacantha John Thomas Howell 1947-8-16 24162 Inyo Field redacted by CAS, contact the data manager for more information 2743 Comment
  CAS-BOT-BC349972  Oreostemma alpigenum var. andersonii John Thomas Howell 1958-8-13 34390 Madera Near Isberg Lake 2987 Comment
  CAS-BOT-BC355618  Oreostemma alpigenum var. andersonii John Thomas Howell; Gordon H. True 1970-7-28 47001 Tulare West side of Big Meadow just south of Pipe Spring. Kern Plateau 2377 Comment
  CAS-BOT-BC355636  Oreostemma alpigenum var. andersonii John Thomas Howell 1951-7-21 28075 Tulare Mineral King and Vicinity. White Chief region 3048 Comment
  CAS-BOT-BC499867  Orobanche fasciculata John Thomas Howell 1958-5-28 33569 Inyo Sierra Nevada: Bishop Creek 1828 Comment
  CAS-BOT-BC500208  Orobanche fasciculata John Thomas Howell 1950-7-13 26759 Tulare Sierra Nevada: Bakeover Meadows, South Fork of Kern River 2468 Comment
  CAS-BOT-BC355695  Orochaenactis thysanocarpha John Thomas Howell 1950-7-21 27145 Tulare Monache Meadows near Soda Creek 2438 Comment
  CAS-BOT-BC355728  Orochaenactis thysanocarpha John Thomas Howell; T. C. Fuller; G. D. Barbe 1980-7-16 53835 Tulare Sherman Pass Road 2.5 miles northeast of the pass, in Trout Creek drainage, Kern Plateau 2560 Comment
  RSA78603  Orthocarpus cuspidatus subsp. copelandii J. T. Howell 1944-7-13 19752 Glenn Summit ridge north of Black Butte Comment
  RSA80296  Orthocarpus faucibarbatus J. T. Howell 1930-4-20 4719 Marin 1 mile east of Lagunitas. Comment
  RSA88374  Oxalis laxa J. T. Howell 1953-5-22 28972 Stanislaus Knight's Ferry, Sierra Nevada 61 Comment
  CAS-BOT-BC413190  Oxyria digyna John Thomas Howell 1946-7-26 22762 Inyo Mono Mesa 3657 Comment
  CAS-BOT-BC413348  Oxytheca perfoliata John Thomas Howell 1927-6-12 2531 San Bernardino Half way between Victorville and Hesperia, Mojave Desert 822 Comment
  RSA192  Oxytheca trilobata J. T. Howell 1927-8-2 563 Riverside Idyllwild, near Strawberry Valley. San Jacinto Mts. Comment
  CAS-BOT-BC202201  Oxytropis oreophila John Thomas Howell 1947-7-25 23668 San Bernardino Mt. San Gorgonio, San Bernardino Mts. 3505 Comment
  CAS-BOT-BC50277  Packera eurycephala var. eurycephala John Thomas Howell 1934-6-11 11915 A Modoc Parker Creek. 1584 Comment
  CAS-BOT-BC317119  Packera pseudaurea var. pseudaurea John Thomas Howell 1940-7-31 15763 Tulare East Lake. 2895 Comment
  CAS-BOT-BC253740  Panicum capillare John Thomas Howell 1966-7-29 42013 Plumas Quincy 1036 Comment
  RSA201355  Panicum capillare J. T. Howell 1960-7-20 35728 Plumas Drakesbad; Lasses Volcanic National Park 1677 Comment
  CAS-BOT-BC274090  Pappostipa speciosa John Thomas Howell 1960-6-6 35343 Fresno Copper Creek Trail, Kings Canyon 1676 Comment
  CAS-BOT-BC253945  Parapholis incurva John Thomas Howell 1945-5-6 20816 Marin Just above high tide, San Rafael Comment
  CAS-BOT-BC413403  Parietaria hespera var. hespera John Thomas Howell 1932-3-13 8228 Ventura San Nicolas Island Comment
  CAS-BOT-BC413416  Parietaria hespera var. hespera John Thomas Howell 1928-4-18 3728 Los Angeles N. side of Griffith Park, Los Angeles Comment
  GH37783  Paronychia ahartii J. T. Howell 1955-6-12 30307 Unknown 8.5 miles south of Corning Comment
  UC692353  Parvisedum pentandrum J. T. Howell 16970 Contra Costa ne of Deer Flat (Mount Diablo); Mount Diablo 609 Comment
  CAS-BOT-BC259664  Paspalum dilatatum John Thomas Howell 1945-8-5 21364 Marin McKinnon's Landing near Stinson Beach Comment
  CAS-BOT-BC259715  Paspalum distichum John Thomas Howell 1973-7-25 49997 Merced Just N of Ingomar on Cottonwood Road to Gustine 30 Comment
  CAS-BOT-BC71331  Pellaea mucronata John Thomas Howell 1945-6-21 21162 Lake Sawmill Flat to Ruppert Ridge, Bartlett Mountain Comment
  CAS-BOT-BC67575  Pellaea mucronata var. californica John Thomas Howell 1967-6-22 42660 Plumas Sierra Nevada - Canyon of the Feather River North Fork, granite near mouth of Chambers Creek. 609 Comment
  NY571180  Penstemon azureus var. azureus J. T. Howell 1958-8-17 34568 Madera Sierra Nevada; The Niche, East Fork of Granite Creek 2438.4 Comment
  JEPS28120  Penstemon caesius John Thomas Howell 1962-7-11 38581 Kern n slope of Black Mt. Sierra Nevada, Greenhorn Mountains, Black Mt. 2133 Comment
  NY593763  Penstemon filiformis J. T. Howell 1937-7-28 13597 Trinity Trinity River Canyon near Eagle Creek Comment
  CAS-BOT-BC265507  Penstemon heterodoxus John Thomas Howell; Gordon H. True 1971-7-14 48501 Tulare Round Meadow, about 3 miles NW of Sirretta Peak, Kern Plateau 2621 Comment
  CAS-BOT-BC239113  Penstemon incertus John Thomas Howell; Gordon H. True 1967-7-3 42744 Inyo Near head of Nine Mile [Ninemile] Canyon 1828 Comment
  CAS-BOT-BC245654  Penstemon incertus John Thomas Howell; Gordon H. True 1971-6-16 47904 Kern Along Kelso Creek, 15 miles south of Weldon on road to Kelso Valley, Sierra Nevada 1219 Comment
  CAS-BOT-BC239498  Penstemon rydbergii var. oreocharis John Thomas Howell 1976-7-20 s.n. Lassen Bottom flats along Willard Creek near its confluence with Susan River, about 5 miles west of Fredonyer Pass 1432 Comment
  RSA0076303  Pentagramma glanduloviscida J. T. Howell 1927-8-7 608 San Diego Between Cottonwood Creek and Potrero. 457 Comment
  CAS-BOT-BC77080  Pentagramma triangularis subsp. triangularis John Thomas Howell 1959-9-26 35091 Butte Sierra Nevada - Pulga Bridge, N. Fk. Feather River 411 Comment
  CAS-BOT-BC222726  Perideridia gairdneri subsp. gairdneri John Thomas Howell 1947-6-18 23272 Marin 3 miles east of Tomales Comment
  UC421623  Perityle emoryi John Thomas Howell 1928-3-24 3515 San Diego near Palm Wash; w Colorado Desert Comment
  CAS-BOT-BC419148  Persicaria maculosa John Thomas Howell 1963-5-18 39357 Monterey Near Aromas Comment
  CAS-BOT-BC419182  Persicaria maculosa John Thomas Howell 1959-9-20 34617 Butte Eastern outskirts of Oroville 60 Comment
  CAS-BOT-BC419206  Persicaria maculosa John Thomas Howell 1970-9-25 47412 Kern Kernville 807 Comment
  CAS-BOT-BC167797  Petalonyx thurberi John Thomas Howell 1927-8-1 2896 San Bernardino Between Morongo Valley and Warren's Well, s. Mojave Desert 914 Comment
  RSA689  Petunia parviflora J. T. Howell 1927-7-18 426 Orange Santa Ana River bottom, Rancho Santa Ana. 152 Comment
  CAS-BOT-BC326772  Peucephyllum schottii John Thomas Howell 1928-3-24 3532 Riverside Painted Canyon, Colorado Desert Comment
  CAS-BOT-BC6691  Phacelia affinis var. patens John Thomas Howell 1928-6-19 4037 Inyo Panamint Mts., near summit of ridge dividing Surprise and Hall Canyons 2590 Comment
  RSA26586  Phacelia ambigua J. T. Howell 1928-3-24 3504 Riverside Near Palm Wash, 35 miles S of Indio and 5 miles W of Hwy Crumbly clay soil. Comment
  RSA112680  Phacelia cicutaria var. cicutaria J. T. Howell 1929-4-14 4158 Mariposa Hills east of Merced Falls. Comment
  RSA112684  Phacelia distans J. T. Howell 1928-5-19 3801 Ventura Anacapa Islands. Comment
  UC702990  Phacelia distans John Thomas Howell 1928-6-10 3888 Los Angeles Fish Canyon San Gabriel Mts. Comment
  SEINET3121758 Image available Phacelia distans John Thomas Howell, Alice Eastwood 1938-6-14 5939 San Luis Obispo Serrano Canyon Comment
  SBBG41433  Phacelia egena J. T. Howell 1929-4-21 4187 Mariposa 5 mi from Mt Bullion on rd to Cathay Valley Comment
  CDA40377  Phacelia egena J. T. Howell 1929-4-21 4190 Mariposa 4 miles from Mt. Bullion on road to Cathay Valley. 0 Comment
  UCD120498  Phacelia hastata subsp. compacta John Thomas Howell 1948-8-1 25279 Mono 3 miles south of Crestview, Sierra Nevada. Comment
  CAS-BOT-BC180013  Phacelia heterophylla subsp. virgata John Thomas Howell 1934-6-11 11911 Modoc Parker Creek. 1584 Comment
  SBBG64997  Phacelia insularis var. continentis J. T. Howell 1930-4-20 4732 Marin Point Reyes Comment
  CAS-BOT-BC145044  Phacelia keckii John Thomas Howell 1931-5-30 6611 Riverside Santiago Peak, Santa Ana Mts. 1219 Comment
  CAS-BOT-BC145107  Phacelia mohavensis John Thomas Howell; Gordon H. True 1969-10-1 46456 Tulare South of Taylor Meadow on road to Raylor Creek crossing 2225 Comment
  CAS-BOT-BC140998  Phacelia novenmillensis John Thomas Howell; Gordon H. True 1967-5-29 42335 Tulare Kern Plateau. Midway between Chimney and Lamont Meadows 1889 Comment
  CAS-BOT-BC140951  Phacelia orogenes John Thomas Howell; Gordon H. True 1967-7-5 43184 Tulare 2.8 milesnorth of South Fork Kern River bridge on road to Troy Meadow. Kern Plateau. 2194 Comment
  RSA597  Phacelia parryi J. T. Howell 1928-6-29 1000 Los Angeles Seminole Hot Springs Road, Santa Monica Mountains 457 Comment
  RSA26561  Phacelia ramosissima var. austrolitoralis J. T. Howell 1927-8-16 2991 Santa Barbara Gaviota Pass 46 Comment
  RSA201495  Phacelia suaveolens subsp. suaveolens J. T. Howell 1946-5-14 21842 Marin Potrero Meadow, Mt. Tamalpais. Comment
  UC699662  Phacelia suaveolens var. keckii John Thomas Howell 1931-5-30 6611 Riverside Santiago Peak Santa Ana Mts. (type locality) 1219 Comment
  CAS-BOT-BC265774  Phalaris aquatica John Thomas Howell 1939-7-18 s.n. Marin East side Bolinas Bay Comment
  CAS-BOT-BC258964  Phalaris californica John Thomas Howell 1937-7-31 13718 Humboldt Between Redwood Creek and Korbel Comment
  CAS-BOT-BC265873  Phalaris canariensis John Thomas Howell 1956-7-15 31691 San Francisco Waterfront Street near Mission Rock Terminal, San Francisco Comment
  CAS-BOT-BC265919  Phalaris lemmonii John Thomas Howell; Gordon H. True 1967-5-31 42516 Tulare About 4 1/2 miles east-northweast of Pixley 83 Comment
  CAS-BOT-BC250632  Phalaris minor John Thomas Howell 1957-8-19 32907 San Francisco San Francisco. Near Quarry Lake, Golden Gate Park Comment
  CAS-BOT-BC253526  Phalaris paradoxa John Thomas Howell 1954-5-8 s.n. Tulare Tulare River Valley, 4.5 miles below Springville, Sierra Nevada 243 Comment
  CAS-BOT-BC134916  Phoradendron bolleanum John Thomas Howell 1962-6-15 37435 Butte Magalia. Sierra Nevada 731 Comment
  CAS-BOT-BC134929  Phoradendron bolleanum John Thomas Howell 1948-4-26 24270 Kern Tehachapi Mts. 7 miles from Mohave Comment
  CAS-BOT-BC135043  Phoradendron bolleanum John Thomas Howell 1960-5-1 35229 Tuolumne Near Pinecrest. Sierra Nevada 1584 Comment
  CAS-BOT-BC135161  Phoradendron juniperinum John Thomas Howell; Gordon H. True 1970-5-28 5365 Nevada Bear Valley on Highway 20, ca. 20 mi E of Nevada City. Sierra Nevada 1402 Comment
  CDA22380  Phoradendron pauciflorum J. T. Howell 1970-9-23 47325 Kern Sierra Nevada; Near Tiger Flat, east side of Sunday Peak, Greenhorn Mountains. Comment
  CAS-BOT-BC141165  Phoradendron serotinum subsp. macrophyllum John Thomas Howell 1926-12-26 2271 Merced Near Hopeton Bridge, Merced River bottom Comment
  CAS-BOT-BC141274  Phoradendron serotinum subsp. tomentosum John Thomas Howell; Gordon H. True 1971-6-15 47872 Kern Lightners Flat on road from Mt. Breckenridge to Havilah, Sierra Nevada 1828 Comment
  CAS-BOT-BC141320  Phoradendron serotinum subsp. tomentosum John Thomas Howell 1945-6-24 21243 Marin Hidden Lake Fien Trail, Mt.Tamalpais Comment
  UCD89831  Phragmites australis John Thomas Howell 1963-8-21 40207 Inyo Alabama Hills, west of Lone Pine. Along Lone Pine Creek. 1371 Comment
  CAS-BOT-BC73473  Picea breweriana John Thomas Howell 1937-7-24 13413 Siskiyou Caribou Basin, Salmon-Trinity Alps 2286 Comment
  RSA0059699  Picea breweriana J. T. Howell 1937-7-24 13413 Siskiyou Caribou Basin, Salmon-Trinity Alps. 1982 Comment
  RSA0059701  Picea breweriana J. T. Howell 1937-7-24 13413 Siskiyou Caribou Basin, Salmon-Trinity Alps. 1982 Comment
  CAS-BOT-BC78260  Pinus albicaulis John Thomas Howell 1944-8-11 s.n. Tuolumne Lambert Dome, Tuolumne Meadows 2865 Comment
  CAS-BOT-BC78504  Pinus contorta subsp. murrayana John Thomas Howell 1950-7-22 27207 Tulare Timberline, Olancha Peak Comment
  CAS-BOT-BC73001  Pinus monophylla John Thomas Howell 1958-5-22 33187 Tulare Sierra Nevada - Kern River Canyon near Roads End P.O. 1066 Comment
  CAS-BOT-BC78895  Pinus monophylla John Thomas Howell 1960-3-24 35150 A Riverside Pinyon Flat, [Palms-to-Pines] Palms to Pines Highway, San Jacinto Mts. Comment
  CAS-BOT-BC72826  Pinus ponderosa John Thomas Howell 1960-8-20 36206 Tehama Near Lassen Volcanic National Park, Morgan 1463 Comment
  CAS-BOT-BC72745  Pinus sabiniana John Thomas Howell; Gordon H. True 1967-5-29 42358 Tulare Sierra Nevada, Kern Plateau - midway between Chimney and Lamont Meadows. 1889 Comment
  CAS-BOT-BC80024  Pinus sabiniana John Thomas Howell 1960-3-25 35162 Kern West side of Walker Pass 1432 Comment
  CAS-BOT-BC254432  Piptatherum miliaceum John Thomas Howell 1943-8-16 19309 San Francisco SE corner Filbert and Van Ness Avenue, San Francisco, in vacant lot Comment
  POM226101  Plagiobothrys bracteatus J. T. Howell 1933-5-21 11321 Napa Napa Comment
  RSA88343  Plagiobothrys chorisianus var. hickmanii J. T. Howell 1953-5-7 s.n. San Benito Roadside hollow, 3 miles northwest of San Juan Comment
  CAS-BOT-BC230966  Plagiobothrys hispidulus John Thomas Howell; Gordon H. True 1973-7-31 50093 Plumas Summit ridge of Thompson Peak, Diamond Range 2194 Comment
  CAS-BOT-BC231046  Plagiobothrys hispidulus John Thomas Howell; Gordon H. True 1969-9-30 46388 Tulare Kern Plateau. Poison Meadow 2316 Comment
  SD149176  Plagiobothrys hispidus John Thomas Howell 1963-8-22 40274 Mono 2.5 miles south of Crestview. Comment
  SD149175  Plagiobothrys kingii var. harknessii John Thomas Howell 1958-5-27 33517 Inyo Bishop Creek. 2040 Comment
  GH403983  Plagiobothrys reticulatus var. rossianorum J. T. Howell 1937-6-6 13016 Unknown Sebastopol Comment
  CAS-BOT-BC58735  Plagiobothrys scouleri John Thomas Howell 1934-6-15 12193 Modoc Dorris Reservoir, 2 mi. E of Alturas. Comment
  CAS-BOT-BC58744  Plagiobothrys scouleri John Thomas Howell 1934-6-15 12186 Modoc Alturas. Comment
  CAS-BOT-BC58760  Plagiobothrys scouleri John Thomas Howell 1934-7-2 12360 Modoc Near mouth of Willow Creek, NE side of Clear Lake. Comment
  RSA39949  Plagiobothrys scouleri var. hispidulus J. T. Howell 1943-7-19 18581 Placer Summit Valley Comment
  SEINET8252054  Plagiobothrys tenellus Thomas Howell 1889-1 1384 Unknown Hornbrook. Comment
  JEPS37918  Plantago elongata John Thomas Howell 1934-3-25 11780 Napa Cuttings Wharf Napa River Comment
  SD71271  Plantago elongata John Howell 1965-4-27 41256 Merced Low alkaline flats and rainpools, 5 miles east of Los Banos, 29 Comment
  JEPS39466  Plantago erecta John Thomas Howell 1956-5-6 31349 San Francisco Sierra Street and 22nd Street (San Francisco); San Francisco Comment
  RSA424277  Plantago truncata subsp. firma J. T. Howell 1944-5-21 19500 Marin Lagunitas Meadows north side of Mount Tamalpais. 244 Comment
  RSA43362  Plectritis ciliosa subsp. ciliosa J. T. Howell 1948-4-26 24289 Santa Clara West side of Pacheco Pass near summit. Comment
  CAS-BOT-BC326579  Pleurocoronis pluriseta John Thomas Howell 1928-1-29 3299 Riverside Painted Canyon, Colorado Desert Comment
  SEINET195361 Image available Pleuropogon californicus J. T. Howell 1945-5-9 20828 Marin Between Hamilton Field and Ignacio. Comment
  CAS-BOT-BC260933  Pleuropogon californicus var. californicus John Thomas Howell 1941-6-10 16280 Marin Near Black Point Comment
  CAS-BOT-BC260953  Pleuropogon californicus var. californicus John Thomas Howell 1945-5-9 20828 Marin Between Hamilton Field and Ignacio Comment
  CAS-BOT-BC260988  Pleuropogon californicus var. californicus John Thomas Howell 1947-6-26 23316 Sonoma Cunningham Marsh Comment
  CAS-BOT-BC261007  Pleuropogon californicus var. davyi John Thomas Howell 1954-4-24 29143 Mendocino 5 miles north of Hopland Comment
  GH360621  Pleuropogon hooverianus J. T. Howell 1943-5-22 18155 Unknown Lagunitas Meadows, Mt. Tamalpais Comment
  UC421657  Pluchea odorata var. odorata John Thomas Howell 1927-9-24 3117 Orange Santa Ana Canyon 152 Comment
  CAS-BOT-BC326616  Pluchea sericea John Thomas Howell 1927-7-24 2823 Orange Santa Ana River bottom, Santa Ana Canyon 152 Comment
  RSA40179  Poa J. T. Howell 1944-7-16 19813 Glenn Black Butte Comment
  CAS-BOT-BC254757  Poa bolanderi John Thomas Howell 1943-7-21 18643 Placer Donner Pass to Mount Lincoln Comment
  CAS-BOT-BC254827  Poa bolanderi John Thomas Howell; Gordon H. True 1966-7-11 41707 Tulare Horse Meadow, Kern Plateau 2255 Comment
  CAS-BOT-BC254969  Poa bulbosa John Thomas Howell; Gordon H. True 1967-5-7 42184 Plumas Injin Jim Campground at confluence of Granite Creek and North Fork of Feather RIver 609 Comment
  SEINET7293871 Image available Poa bulbosa subsp. bulbosa John Thomas Howell, Gordon H. True 1969-1 45723 Tulare Roadside flat, mouth of Brush Creek, Kern River Canyon 1189 Comment
  CAS-BOT-BC254638  Poa cusickii subsp. epilis John Thomas Howell 1944-8-15 20538 Tuolumne Mount Conness 3505 Comment
  CAS-BOT-BC255143  Poa cusickii subsp. epilis John Thomas Howell 1943-7-22 18713 Placer Summit Valley Comment
  CAS-BOT-BC246676  Poa howellii John Thomas Howell 1956-3-27 31243 Monterey Santa Lucia Mountains. Bixby Creek Canyon Comment
  POM304497  Poa keckii J. T. Howell 1942-7-31 17488 Tulare Above timberline, Mt. Kaweah Comment
  RSA24108  Poa keckii J. T. Howell 1947-8-14 24108 Inyo Inconsolable Range above Thunder and Lightning Lake. 3659 Comment
  UC905083  Poa keckii John Thomas Howell 1949-7-19 25507 Tulare Rock Creek; Sierra Nevada 3200 Comment
  CAS-BOT-BC246797  Poa leibergii John Thomas Howell 1942-7-31 17470 Tulare Mt. Kaweah Comment
  CAS-BOT-BC246811  Poa leibergii John Thomas Howell 1949-8-9 26199 Tulare Cirque Peak 3733 Comment
  CAS-BOT-BC255870  Poa leibergii John Thomas Howell 1963-7-10 39734 Alpine 0.5 mile west of Monitor Pass, Sierra Nevada 2529 Comment
  SEINET10893572  Poa nevadensis John Thomas Howell 1943-8-3 Howell 18976 Glenn Plaskett Meadows. 1829 Comment
  CAS-BOT-BC247329  Poa pratensis John Thomas Howell 1944-6-4 19545 Marin Inverness Ridge west of Inverness Comment
  CAS-BOT-BC255200  Poa pratensis John Thomas Howell 1949-7-19 25492 Tulare Rock Creek 3200 Comment
  CAS-BOT-BC247049  Poa secunda subsp. juncifolia John Thomas Howell 1958-5-29 33618 Inyo Bishop 1264 Comment
  CAS-BOT-BC247070  Poa secunda subsp. juncifolia John Thomas Howell 1963-7-10 39696 Alpine Grover Hot Springs 1798 Comment
  CAS-BOT-BC247081  Poa secunda subsp. juncifolia John Thomas Howell 1955-7-19 30800 Plumas Vinton 1505 Comment
  SEINET7294035 Image available Poa secunda subsp. juncifolia John Thomas Howell, Gordon H. True 1970-1 47007 Tulare West side od Big Meadow just south of Pipe Spring. 2377 Comment
  SEINET7294047 Image available Poa secunda subsp. juncifolia John Thomas Howell 1978-1 53355 Nevada 5 miles north of Truckee on road to Sierraville 1768 Comment
  CAS-BOT-BC235940  Poa secunda subsp. secunda John Thomas Howell 1948-7-23 24929 Fresno Bubbs Creek Canyon in vicinity of Vidette Meadows 3048 Comment
  CAS-BOT-BC236173  Poa secunda subsp. secunda John Thomas Howell 1943-5-11 18019 Lake 1 miles S of Lakeport Comment
  CAS-BOT-BC242940  Poa secunda subsp. secunda John Thomas Howell 1943-7-16 18397 Nevada W side of Donner Pass near Norden, Boreal Ridge 2133 Comment
  CAS-BOT-BC243246  Poa secunda subsp. secunda John Thomas Howell; et al. 1981-5-14 53950 Sonoma Fairfield Osborn Preserve of the Nature Conservancy, 4.5 miles NE of Penngrove on the W slope of Sonoma Mountain 457 Comment
  CAS-BOT-BC244516  Poa secunda subsp. secunda John Thomas Howell 1943-8-8 19182 Mendocino Anthony Peak, Tehoma-Mendocino County Comment
  CAS-BOT-BC244529  Poa secunda subsp. secunda John Thomas Howell 1941-4-17 s.n. Marin Tiburon Peninsula Comment
  CAS-BOT-BC236348  Poa secunda subsp. secunda John Thomas Howell 1953-4-26 28929 Alameda Hills at W end of Corral Hollow Comment
  CAS-BOT-BC243012  Poa secunda subsp. secunda John Thomas Howell 1933-4-22 11057 San Benito Between Paicines and Pinnacles Post Office Comment
  SEINET7294131 Image available Poa secunda subsp. secunda John Thomas Howell 1955-1 30268 Tuolumne Meadowy place between Long Barn and Pinecrest 1707 Comment
  CAS-BOT-BC244149  Poa sierrae John Thomas Howell; Gordon H. True 1969-6-23 45801 Plumas Lewisia Rock, Feather River Canyon 609 Comment
  UC710576  Poa stebbinsii John Thomas Howell 1944-8-8 20153 Mariposa high gap s of Elizabeth Lake Comment
  CAS-BOT-BC244166  Poa trivialis John Thomas Howell; Gordon H. True 1968-6-10 44551 Plumas Quincy 1036 Comment
  CAS-BOT-BC244214  Poa unilateralis John Thomas Howell 1933-4-12 10995 Marin Sausalito hills Comment
  CAS-BOT-BC170347  Polygala cornuta var. cornuta John Thomas Howell 1936-8-25 12783 Trinity Near Trinity Center Comment
  CAS-BOT-BC419777  Polygonum argyrocoleon John Thomas Howell 1948-7-2 24770 Los Angeles Palos Verdes Hills Comment
  RSA215896  Polygonum argyrocoleon J. T. Howell 1957-6-16 32640 San Francisco Third and Davidson streets. Comment
  CAS-BOT-BC414161  Polygonum aviculare subsp. aviculare John Thomas Howell; Gordon H. True 1967-6-11 42550 Yolo NW. of Woodland Comment
  CAS-BOT-BC414282  Polygonum aviculare subsp. depressum John Thomas Howell; Catherine Best; Wilma Follette; Gordon True; Mary P. Wells 1981-5-14 53939 Sonoma Fairfield Osborn Preserve of the Nature Conservancy, 4.5 miles northeast of Penngrove on the west slope of Sonoma Mountain 457 Comment
  CAS-BOT-BC414334  Polygonum aviculare subsp. rurivagum John Thomas Howell 1963-6-22 39579 Monterey Priest Valley 685 Comment
  UC473457  Polygonum californicum John Thomas Howell 1930-10-12 5568 El Dorado 4 mi n Placerville Comment
  CAS-BOT-BC218142  Polygonum douglasii John Thomas Howell 1934-6-12 12002 Modoc Davis Creek. Comment
  CAS-BOT-BC414617  Polygonum douglasii John Thomas Howell 1950-7-13 26798 Tulare Bakeoven Meadows, South Fork of Kern River 2468 Comment
  POM203796  Polygonum douglasii J. T. Howell 1934-6-12 12002 Modoc Davis Creek Comment
  UCD100239  Polygonum douglasii John Thomas Howell 1960-7-18 35569 Plumas Lassen Volcanic National Park. Drakesbad. 1676 Comment
  RSA22223  Polygonum douglasii subsp. johnstonii J. T. Howell 1938-8-7 14322 Mono Crooked Creek. 2058 Comment
Read comments
Jul 2 2012
  SEINET12884070 Image available Polygonum minimum J. T. Howell 1944-1 20308 Unknown Comment
  CAS-BOT-BC419822  Polygonum parryi John Thomas Howell 1943-8-4 19054 Glenn Summit ridge n. of Black Butte Comment
  CAS-BOT-BC419831  Polygonum parryi John Thomas Howell 1940-5-19 15466 Napa Upper St. Helena Creek Comment
  CAS-BOT-BC419844  Polygonum parryi John Thomas Howell 1954-6-4 29920 Tuolumne Between Twain Harte and Stanislaus River bridge Comment
  SEINET12884039 Image available Polygonum parryi J. T. Howell 1945-1 21062 Unknown Comment
  CAS-BOT-BC420120  Polygonum polygaloides subsp. kelloggii John Thomas Howell; Gordon H. True 1966-7-11 41735 Tulare Horse Meadow, Kern Plateau 2255 Comment
  CAS-BOT-BC419923  Polygonum polygaloides subsp. kelloggii John Thomas Howell 1977-8-3 52569 Alpine At summit of Ebbetts Pass 2651 Comment
  CAS-BOT-BC420031  Polygonum polygaloides subsp. kelloggii John Thomas Howell 1925-6-30 1268 Placer Near Eagle Falls, Emerald Bay, Lake Tahoe. Comment
  CAS-BOT-BC420060  Polygonum polygaloides subsp. kelloggii John Thomas Howell; H. Keith Wagnon 1980-5-27 53615 Plumas 1 mile west of Almanor 1386 Comment
  CAS-BOT-BC420145  Polygonum ramosissimum subsp. ramosissimum John Thomas Howell 1934-7-8 12501 Lassen Spalding's, Eagle Lake Comment
  RSA127092  Polygonum spergulariiforme J. T. Howell 1947-9-6 24182 Marin E of Dillons Beach Comment
  CAS-BOT-BC71889  Polypodium californicum John Thomas Howell 1928-2-9 3331 Los Angeles Santa Anita Canyon, San Gabriel Mts. Comment
  CAS-BOT-BC72095  Polypodium scouleri John Thomas Howell 1957-5-17 32314 San Francisco Bayview Hills Comment
  CAS-BOT-BC232466  Polypogon monspeliensis John Thomas Howell 1963-5-18 39326 Monterey 2.5 miles S of Aromas 60 Comment
  CAS-BOT-BC237304  Polypogon monspeliensis John Thomas Howell 1956-9-9 31859 San Francisco San Francisco. Near stand at SE end of Lake Merced Comment
  CAS-BOT-BC237623  Polypogon viridis John Thomas Howell; Gordon H. True 1967-9-18 43780 Tulare Kern Plateau. Recreation area, N end of Lamont Meadow 1706 Comment
  CAS-BOT-BC72190  Polystichum dudleyi John Thomas Howell 1948-5-22 24308 Marin Camp Tucker, Mt. Tamalpais Comment
  CAS-BOT-BC102568  Populus fremontii John Thomas Howell 1956-3-24 31181 Monterey San Antonio River near the mission Comment
  CAS-BOT-BC102713  Populus tremuloides John Thomas Howell 1944-8-14 s.n. Tuolumne Glen Aulin Comment
  CAS-BOT-BC102996  Populus trichocarpa John Thomas Howell 1950-7-16 26947 Tulare Bakeoven Meadows, South Fork of Kern River 2468 Comment
  CAS-BOT-BC105608  Populus trichocarpa John Thomas Howell 1927-7-21 2809 Orange On edge of marshy place but above water, Santa Ana River bottom, Santa Ana Canyon [Canon] 152 Comment
  CAS-BOT-BC356151  Porophyllum gracile John Thomas Howell 1929-3-2 4097 Orange In hills on n. side of Santa Ana Canon [Canyon], 1/2 mile east of Horseshoe Bend 152 Comment
  SEINET10460777  Porterella carnosula Howell 1969-9-29 Howell 46282 Tulare Upper Dry lake, east of north end of Long Meadow 2393 Comment
  CAS-BOT-BC445274  Portulaca oleracea John Thomas Howell 1959-9-21 34749 Plumas Sand bars of N. Fk. Feather River, near Belden 701 Comment
  RSA216120  Potamogeton foliosus J. T. Howell 1957-8-15 32894 a San Francisco Ponds in strybing Arboretum, Golden Gate Park, San Francisco County Comment
  CAS-BOT-BC267228  Potamogeton robbinsii John Thomas Howell 1947-8-15 24127 Inyo Big Pine Lakes, Fourth Lakes 3291 Comment
  CAS-BOT-BC143159  Potentilla breweri John Thomas Howell 1941-7-31 16586 Madera Agnew Pass Comment
  CAS-BOT-BC143255  Potentilla flabellifolia John Thomas Howell 1937-7-24 13398 Siskiyou Caribou Basin, Salmon-Trinity Alps 2286 Comment
  CAS-BOT-BC143278  Potentilla flabellifolia John Thomas Howell 1944-8-8 20105 Tuolumne Between Elizabeth Lake and Tuolumne Meadows Comment
  RSA442244  Potentilla glandulosa subsp. pseudorupestris J. T. Howell 1947-8-9 23963 Inyo Seventh Lake. Big Pine Lakes. 3415 Comment
  CAS-BOT-BC158444  Potentilla glaucophylla var. glaucophylla John Thomas Howell 1946-7-14 22306 Inyo Mosquito Flat, Rock Creek Lake Basin 3139 Comment
  CAS-BOT-BC540409  Potentilla gracilis var. fastigiata John Thomas Howell 1955-7-20 30832 Plumas Sierra Nevada, Mohawk 1371 Comment
  CAS-BOT-BC145249  Potentilla wheeleri John Thomas Howell; Gordon H. True 1967-7-4 42942 Tulare Troy Meadow. Kern Plateau. 2377 Comment
  CAS-BOT-BC47633  Primula suffrutescens John Thomas Howell 1949-8-9 26187 Tulare Cirque Peak 3733 Comment
  CAS-BOT-BC47635  Primula suffrutescens John Thomas Howell 1951-7-18 27924 Tulare Franklin Pass 3535 Comment
  CAS-BOT-BC158596  Prunus John Thomas Howell 1959-9-21 34782 Plumas N. Fk. Feather River near Belden 701 Comment
  CAS-BOT-BC159748  Prunus andersonii John Thomas Howell 1958-5-27 33490 Inyo North Fork of Bishop Creek 2438 Comment
  CAS-BOT-BC162987  Prunus emarginata John Thomas Howell 1927-8-29 3077 Tulare NE end of Cahoon Meadow, Sequoia Park 2499 Comment
  UCD113217  Prunus emarginata John Thomas Howell 1960-8-18 36044 Tehama Bluff Falls. 1981 Comment
  CAS-BOT-BC158309  Prunus fasciculata var. fasciculata John Thomas Howell 1927-6-11 2494 San Bernardino Old road between Cajon Pass and Hesperia, Mojave Desert 1036 Comment
  CAS-BOT-BC154585  Prunus ilicifolia John Thomas Howell 1931-4-10 6227 Santa Barbara Ravenswood, Santa Cruz Island Comment
  CAS-BOT-BC356510  Pseudognaphalium beneolens John Thomas Howell 1970-9-22 47292 Tulare Kern River Canyon, 3 miles south of Hospital Flat 853 Comment
  UCSB7181  Pseudognaphalium luteoalbum Howell, John 1943-6-29 San Francisco Concert Valley, Golden State Park, San Francisco Comment
  CAS-BOT-BC357274  Pseudognaphalium microcephalum John Thomas Howell 1962-9-25 38883 Kern Kern River Bed, 3 miles north of Kernville 822 Comment
  CAS-BOT-BC357619  Pseudognaphalium stramineum John Thomas Howell 1962-7-9 38384 Kern Near Park headquarters. Greenhorn Mountains 1798 Comment
  CAS-BOT-BC361626  Pseudognaphalium stramineum John Thomas Howell 1970-9-22 47316 Tulare Fairview 1066 Comment
  JEPS29571  Pseudognaphalium thermale John Thomas Howell 1960-7-20 35756 Plumas Boiling Springs Lake Lassen Volcanic Park, Boiling Springs Lake 1798 Comment
  CAS-BOT-BC252508  Pseudoroegneria spicata subsp. spicata John Thomas Howell 1934-6-30 12278 Modoc Duncan Horse Camp. 1355 Comment
  CAS-BOT-BC174804  Pseudostellaria jamesiana John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-24 54232 Plumas About 4 miles southeast of Mt. Hough on the road to Quincy 1645 Comment
  RSA1136  Pseudotsuga macrocarpa J. T. Howell 1928-7-8 1054 Riverside Santa Ana Mountains above Glen Ivy 1524 Comment
  RSA983  Pseudotsuga menziesii J. T. Howell 1927-8-25 694 Mendocino Near Wandling. Comment
  SEINET4456821  Pseudotsuga menziesii T. J. Howell 1881-1 s.n. Unknown Pacific Coast Comment
  CAS-BOT-BC72520  Pteridium aquilinum John Thomas Howell 1943-8-12 19285 Glenn Plaskett Meadows 1828 Comment
  CAS-BOT-BC421215  Pterostegia drymarioides John Thomas Howell 1945-5-6 20806 Marin San Rafael Hills Comment
  CAS-BOT-BC239771  Ptilagrostis kingii John Thomas Howell 1940-8-1 15838 Tulare Between Reflection Lake and Harrison Pass Comment
  UCD92940  Ptilagrostis kingii John Thomas Howell 1942-7-29 17378 Tulare Little Five Lakes Basin. Comment
  RSA1360  Purshia tridentata var. glandulosa J. T. Howell 1929-2-21 1242 San Bernardino Cactus Flats. Comment
  CAS-BOT-BC462899  Pyrola asarifolia John Thomas Howell 1963-6-3 39398 Plumas Sierra Nevada, Butterfly Valley Comment
  CAS-BOT-BC462625  Pyrola dentata John Thomas Howell 1958-8-2 34193 Fresno Sierra Nevada: Copper Creek Canyo Trail 2286 Comment
  CAS-BOT-BC462910  Pyrola dentata John Thomas Howell 1949-7-30 25912 A Tulare Between Tunnel and Ramshaw Meadows 2712 Comment
  CAS-BOT-BC362267  Pyrrocoma carthamoides var. cusickii John Thomas Howell 1962-6-17 37716 Plumas Portola 1463 Comment
  CAS-BOT-BC362282  Pyrrocoma lanceolata var. lanceolata John Thomas Howell 1978-7-26 53194 Nevada Boca Flats on Little Truckee River, 5 miles north of Hirschdale on road to Stampede Reservoir 1767 Comment
  CAS-BOT-BC328158  Pyrrocoma lucida John Thomas Howell 1959-9-25 35007 Plumas Sierra Valley near Beckwourth, Sierra Nevada 1493 Comment
  CAS-BOT-BC104419  Quercus X subconvexa John Thomas Howell; John Tucker 1947-8-31 24175 Marin Ridgecrest Road N of Alpine Lake Comment
  RSA127061  Quercus X subconvexa J. T. Howell, J. M. Tucker 1947-8-31 24175 Marin Ridgecrest road north of AlpineLake. Comment
  UCD47295  Quercus X subconvexa John Thomas Howell 1952-5-15 28314 Marin Serpentine at south end of Tiburon Peninsula, Marin Co. Comment
  CAS-BOT-BC62779  Quercus berberidifolia John Thomas Howell 1945-7-15 21302 Marin Fairfax Hills near Camp Lilienthal Comment
  RSA164  Quercus berberidifolia J. T. Howell 1927-6-16 143 Orange Botany Garden, Rancho Santa Ana. 152 Comment
  CAS-BOT-BC86862  Quercus douglasii John Thomas Howell 1970-9-24 47355 Kern S of Bodfish 853 Comment
  CAS-BOT-BC86103  Quercus dumosa John Thomas Howell 1955-6-15 30497 A Butte 6 miles from paradise on road to Pentz 426 Comment
  CAS-BOT-BC86432  Quercus dumosa John Thomas Howell 1930-10-25 5671 Monterey Canyon of the Arroyo Seco River, Santa Lucia Mts. Comment
  CAS-BOT-BC62798  Quercus garryana John Thomas Howell 1955-6-15 30500 Butte 6 miles form Paradise on road to Pentz 426 Comment
  CAS-BOT-BC94305  Quercus garryana John Thomas Howell 1943-8-6 19139 Glenn Meadow SE of Black Butte Comment
  CAS-BOT-BC94682  Quercus garryana var. breweri John Thomas Howell 1962-5-22 37372 Tulare 1.5 mi E of Johnsondale 1371 Comment
  CAS-BOT-BC105126  Quercus kelloggii John Thomas Howell 1925-11-27 1574 Solano Green Valley Comment
  CAS-BOT-BC105231  Quercus kelloggii John Thomas Howell 1967-11-6 44183 Kern Greenhorn Mountains. 6.5 miles from Glennville on road to Kernville 1371 Comment
  CAS-BOT-BC105260  Quercus kelloggii John Thomas Howell 1940-9-22 s.n. Marin Phoenix lake, Mt. Tamalpais Comment
  CAS-BOT-BC105494  Quercus kelloggii John Thomas Howell 1936-8-28 12869 Trinity 12 miles from Douglas City on road to Peanut Comment
  CAS-BOT-BC62881  Quercus lobata John Thomas Howell 1933-8-27 11630 Napa Sage canyon, Napa Range Comment
  CAS-BOT-BC134867  Quercus wislizeni John Thomas Howell 1926-6-13 2013 Stanislaus Knight's Ferry 76 Comment
  CAS-BOT-BC362736  Raillardella argentea John Thomas Howell 1944-8-8 20155 Mariposa High gap south of Elizabeth Lake Comment
  CAS-BOT-BC362780  Raillardella argentea John Thomas Howell 1949-7-24 25697 Tulare Primrose Lake 3505 Comment
  CAS-BOT-BC379282  Ranunculus alismifolius var. alismellus John Thomas Howell; Gordon H. True 1970-6-23 46631 Tulare Kern Plateau, forest border, NE end of Big Meadow 2377 Comment
  CAS-BOT-BC379309  Ranunculus alismifolius var. alismellus John Thomas Howell 1950-7-14 26805 Tulare south Fork of Kern River, at Bakeoven Meadow 2469 Comment
  CAS-BOT-BC378928  Ranunculus bulbosus John Thomas Howell 1975-6-15 51128 Plumas Sierra Nevada, Quincy 488 Comment
  UC827725  Ranunculus eschscholtzii var. suksdorfii John Thomas Howell 1937-7-25 13439 Siskiyou Caribou Basin Salmon-Trinity Alps 1981 Comment
  RSA95438  Ranunculus occidentalis var. ultramontanus J. T. Howell 1951-6-27 27621 Plumas Jamison Creek 1829 Comment
  UC1176752  Ranunculus repens John Thomas Howell 1946-6-9 22014 Marin Pierce Ranch Point Reyes Peninsula Comment
  RSA1043  Rhamnus crocea J. T. Howell 1927-8-16 s.n. Santa Barbara Near Buelton Comment
  RSA518952  Rhamnus rubra J. T. Howell 1958-7-23 33782 Fresno Simpson Meadow, Middle Fork of the Kings River 1829 Comment
  CAS-BOT-BC58106  Rhododendron columbianum John Thomas Howell 1942-7-29 17363 Tulare Little Five Lakes Basin. Comment
  CAS-BOT-BC58112  Rhododendron columbianum John Thomas Howell 1949-7-20 25546 Tulare Rock Creek. 3444 Comment
  CAS-BOT-BC56642  Rhododendron occidentale John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-6-29 53175 Calaveras Snowshoe Spring near Dorrington 1463 Comment
  A347072  Rhus integrifolia J. T. Howell 1927-6-16 2545 Unknown Santa Ana Canyon Comment
  CAS-BOT-BC167878  Rhus integrifolia John Thomas Howell 1927-7-29 2870 Orange North side of Santa Ana [Canon] Canyon 243 Comment
  CAS-BOT-BC170437  Rhus integrifolia John Thomas Howell 1927-6-18 2556 San Bernardino Aliso Canyon, southern Puente Hills near Santa Ana Canyon Comment
  CAS-BOT-BC111894  Rhynchospora californica John Thomas Howell 1945-8-14 21382 Sonoma Perry Marsh 182 Comment
  CAS-BOT-BC111929  Rhynchospora recognita John Thomas Howell 1945-7-18 21324 Sonoma Pitkin Marsh Comment
  JEPS85661  Ribes John Thomas Howell 1925-6-10 1143 El Dorado Eagle Lake Trail Lake Tahoe region Comment
  CAS-BOT-BC92279  Ribes amarum John Thomas Howell 1928-2-18 3351 Los Angeles Trail to Switzer's, Arroyo Seco, San Gabriel Mountains. Comment
  CAS-BOT-BC92429  Ribes aureum var. gracillimum John Thomas Howell 1930-4-6 4667 Santa Clara 9 miles from summit of Mount Hamilton on road to San Antonio Valley. Comment
  CAS-BOT-BC168884  Ribes lobbii John Thomas Howell 1943-8-8 19205 Tehama Log Spring Ridge Comment
  CAS-BOT-BC209276  Ribes menziesii John Thomas Howell 1944-3-26 19352 Marin Pines of Inverness Ridge n. of Mt. Vision Comment
  UC1176762  Ribes menziesii John Thomas Howell 1944-7-9 19695 Marin Inverness Comment
  A380639  Ribes nevadense J. T. Howell 1937-7-26 13528 Unknown Caribou Basin, Salmon-Trinity Alps 1981 Comment
  CAS-BOT-BC219197  Ribes nevadense John Thomas Howell 1924-5-11 308 A Mariposa Near Wawona, Wawona Valley 1219 Comment
  CAS-BOT-BC186231  Ribes roezlii var. roezlii John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-24 54239 Plumas About 3 miles southeast of Mt. Hough on road to Quincy 1737 Comment
  CAS-BOT-BC198970  Ribes roezlii var. roezlii John Thomas Howell 1925-6-10 1146 El Dorado Eagle Lake, Lake Tahoe Region Comment
  CAS-BOT-BC173877  Ribes velutinum John Thomas Howell 1958-5-27 33480 Inyo North Fork of Bishop Creek 2438 Comment
  CAS-BOT-BC173924  Ribes velutinum John Thomas Howell; Gordon H. True 1967-7-5 43054 Tulare 4.7 miles north of Chimney Meadow, Kern Plateau 2255 Comment
  CAS-BOT-BC173965  Ribes viscosissimum John Thomas Howell 1925-6-10 1143 El Dorado Eagle Lake Trail, Lake Tahoe region 2042 Comment
  CAS-BOT-BC363047  Rigiopappus leptocladus John Thomas Howell 1931-4-3 6130 Napa Pope Creek Canyon, 8 miles from Monticello, Napa Range Comment
  CAS-BOT-BC74586  Rorippa curvisiliqua John Thomas Howell 1963-8-5 39915 Monterey Along Watsonville-San Juan Road, about 2 miles south of Aromas. Comment
  CAS-BOT-BC74748  Rorippa curvisiliqua John Thomas Howell 1948-7-30 25191 Tulare John Muir Trail west of Center Peak. 3200 Comment
  CAS-BOT-BC74791  Rorippa palustris var. palustris John Thomas Howell 1925-7-4 1377 El Dorado Emerald Bay, Lake Tahoe. 1889 Comment
  CAS-BOT-BC147498  Rosa californica John Thomas Howell 1946-6-30 22162 Marin Rodeo Lagoon Comment
  CAS-BOT-BC152655  Rosa californica John Thomas Howell 1932-9-18 10773 Sonoma Bank of slough draining Kenwood Marsh Comment
  RSA88310  Rosa eglanteria J. T. Howell 1953-5-23 28992 Tuolumne Inwaste ground, Columbia. 640 Comment
  CAS-BOT-BC148167  Rosa gymnocarpa John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-23 54191 Plumas 4 miles north of Grays Flat, on road to Long Valley - Sierra Nevada 1447 Comment
  CAS-BOT-BC146995  Rosa woodsii subsp. ultramontana John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-8-12 54497 Mono Iris Meadow, Rock Creek Canyon 2560 Comment
  CAS-BOT-BC149750  Rosa woodsii subsp. ultramontana John Thomas Howell; Gordon H. True 1966-7-13 41973 Tulare Dry Lake on Cherry Hill Road south of Big Meadow, Kern Plateau 2377 Comment
  CAS-BOT-BC149761  Rosa woodsii subsp. ultramontana John Thomas Howell 1950-7-23 27247 Tulare Bakeoven Meadows, South Fork of Kern River 2468 Comment
  SEINET208524 Image available Rostraria cristata John T. Howell 1956-4-16 31248 Alameda Alameda; street weed at Paru and Dayton Streets Comment
  CDA3945  Rubus armeniacus J. T. Howell 1943-8-29 19311 Marin Summit (Avenue) Ridge, Mill Valley. 0 Comment
  CAS-BOT-BC148000  Rubus leucodermis John Thomas Howell 1937-7-27 13585 Trinity Coffee Creek Canyon near Union Creek Comment
  CAS-BOT-BC148027  Rubus leucodermis John Thomas Howell; Alice Eastwood 1938-7-7 6128 Mendocino Cummins P.O. Comment
  CAS-BOT-BC148390  Rubus leucodermis John Thomas Howell 1974-7-9 50482 Lassen Coniferous forest between Susanville and SW end of Eagle Lake 1828 Comment
  A346283  Rubus ursinus J. T. Howell 1938-6-4 13888 Unknown Burlingame Comment
  CAS-BOT-BC156921  Rubus ursinus John Thomas Howell 1967-6-23 42679 Plumas Canyon of Butterfly Creek 1036 Comment
  CAS-BOT-BC156952  Rubus ursinus John Thomas Howell 1957-5-22 32381 San Francisco Bayview Hills, San Francisco Comment
  CAS-BOT-BC158771  Rubus ursinus John Thomas Howell 1962-6-15 37455 Butte Magalia - Sierra Nevada 731 Comment
  UC1177247  Rubus ursinus John Thomas Howell 1943-4-11 17894 Marin Black Canyon San Rafael Hills, Black Canyon Comment
  RSA220067  Rubus ursinus var. sirbenus J. T. Howell 1956-8-26 31815 San Francisco Near Pine Lake. Comment
  POM261516  Rubus vitifolius J. T. Howell 1938-5-22 13799 Marin San Anselmo Canyon. Comment
  CAS-BOT-BC363184  Rudbeckia californica John Thomas Howell 1969-8-26 45925 Tulare Monarch Creek Trail near Mineral King 2590 Comment
  CAS-BOT-BC421964  Rumex acetosella John Thomas Howell 1966-4-18 41483 Marin John Thomas Howell Botanical Garden, Tiburon Comment
  CAS-BOT-BC422068  Rumex acetosella John Thomas Howell 1964-6-29 40818 San Luis Obispo Near St. Paul's Episcopal Church, Cambria Comment
  CAS-BOT-BC416361  Rumex californicus John Thomas Howell 1956-6-10 31530 San Francisco North slope of Bay View Hills, San Francisco Comment
  CAS-BOT-BC422192  Rumex californicus John Thomas Howell; Gordon H. True 1970-7-27 46923 Tulare Forest border of Big Meadow, on the east side at Joughin Camp. Kern Plateau 2377 Comment
  CAS-BOT-BC421745  Rumex conglomeratus John Thomas Howell 1976-10-29 52286 El Dorado Along the course of Sweetwater Creek below the high-water line of Folsom Lake 121 Comment
  CAS-BOT-BC433402  Rumex crispus John Thomas Howell 1960-8-22 36361 Shasta Lassen Volcanic National Park. Manzanita Lake 1783 Comment
  CAS-BOT-BC433665  Rumex obtusifolius John Thomas Howell 1941-6-29 16346 Marin Cascade Canyon, Mill Valley Comment
  CAS-BOT-BC433762  Rumex pulcher John Thomas Howell 1954-5-16 29583 Sacramento 4 miles southeast of Folsom on Placerville road 121 Comment
  CAS-BOT-BC433813  Rumex pulcher John Thomas Howell 1964-6-29 40781 San Luis Obispo Cambria Comment
  CAS-BOT-BC434088  Rumex transitorius John Thomas Howell 1937-7-30 13695 Trinity Dan Rice Creek, Scott Mts. Comment
  CAS-BOT-BC434291  Rumex triangulivalvis John Thomas Howell 1943-7-21 18686 Nevada West side of Donner Pass near Norden 2133 Comment
  CAS-BOT-BC434322  Rumex triangulivalvis John Thomas Howell 1955-7-20 30878 Sierra Near Calpine 1508 Comment
  CAS-BOT-BC434275  Rumex triangulivalvis John Thomas Howell 1938-8-8 14412 Mono Mammouth [Mammoth] Lakes Basin Comment
  GH364824  Rumex venosus J. T. Howell & G. H. True 1973-5-12 49231 Unknown Northwest of Doyle on road to Milford 1280 Comment
  CAS-BOT-BC103055  Salix bonplandiana John Thomas Howell; Catherine Best 1983-4-19 54720 Kern Kern River Preserve of The Nature Conservancy, South Fork Valley near Weldon Comment
  CAS-BOT-BC129639  Salix bonplandiana John Thomas Howell; Gordon H. True 1966-7-10 41594 Tulare On bank of Kern River at Roads End - Sierra Nevada 1066 Comment
  CAS-BOT-BC129756  Salix bonplandiana John Thomas Howell 1970-9-22 47236 Kern Along Kern River between Kernville and River Kern - Sierra Nevada 822 Comment
  CAS-BOT-BC129905  Salix bonplandiana John Thomas Howell; Gordon H. True; Lewis S. Rose 1968-6-12 4294 Butte Feather River Canyon near Pulga Bridge 609 Comment
  CAS-BOT-BC103290  Salix bonplandiana John Thomas Howell 1931-3-21 5921 Santa Barbara Flood plain of Cuyama River 30 miles from Maricopa Comment
  CAS-BOT-BC102862  Salix breweri John Thomas Howell 1963-6-21 39504 Monterey Mustang Grade east of San Lorenzo Creek Comment
  A382493  Salix eastwoodiae J. T. Howell 1940-8-4 15961 Unknown East Lake 2926 Comment
  A382570  Salix eastwoodiae J. T. Howell 1946-7-12 22227 Unknown Dingley Creek at Dog Lake Trail Comment
  CAS-BOT-BC103656  Salix eastwoodiae John Thomas Howell 1969-9-13 46120 Sierra Little Truckee River near outlet of Webber Lake 2042 Comment
  CAS-BOT-BC103883  Salix exigua John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-6-23 54187 Plumas Rush Creek 1402 Comment
  CAS-BOT-BC107978  Salix exigua John Thomas Howell 1970-9-22 47286 Tulare 3 miles south of Hospital Flat, Kern River Canyon, Sierra Nevada 853 Comment
  CAS-BOT-BC108378  Salix exigua John Thomas Howell 33513 Inyo Bishop Creek - Sierra Nevada 2042 Comment
  GH382681  Salix exigua J. T. Howell & G. H. True 1974-5-31 7694 Unknown Highway 49, at South Wolf Creek bridge, 3.6 miles north of Bear River 400 Comment
  CAS-BOT-BC103967  Salix geyeriana John Thomas Howell; T. C. Fuller; G. D. Barbe 1981-8-12 54503 Mono Rock Creek Road to Rock Creek Lake Basin 2849 Comment
  CAS-BOT-BC106961  Salix lasiolepis John Thomas Howell 1960-3-25 35160 Kern Headwaters of Cane Brake Creek west of Walker Pass summit 1463 Comment
  CAS-BOT-BC107232  Salix lasiolepis var. bigelovii John Thomas Howell 1958-2-20 33013 San Francisco North side of Lone Mt. - San Francisco Comment
  CAS-BOT-BC128256  Salix lasiolepis var. lasiolepis John Thomas Howell; Gordon H. True 1967-9-19 43826 Tulare Flood-plain of Kern River South Fork, Kennedy Meadows Campground - Kern Plateau, Sierra Nevada 1859 Comment
  CAS-BOT-BC124941  Salix lemmonii John Thomas Howell 1960-8-18 36096 Tehama Sulphur Works Entrance Station 2011 Comment
  RSA503349  Salix lucida subsp. lasiandra J. T. Howell 1975-6-4 51025 Tuolumne S Fork Tuolumne River S of Mather. Comment
  CAS-BOT-BC125574  Salix lutea John Thomas Howell 1969-9-5 46215 Mono Leavitt Meadow 2194 Comment
  CAS-BOT-BC125653  Salix melanopsis John Thomas Howell 1945-6-21 21208 Lake Near Barlett Springs 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-BC125806  Salix orestera John Thomas Howell 1938-8-8 14417 Mono Mammoth Lakes Basin Comment
  RSA44403  Salix orestera J. T. Howell 1947-8-8 23926 Inyo Second to Third Lake, Big Pine Lakes. 3049 Comment
  CAS-BOT-BC125925  Salix planifolia John Thomas Howell 1944-8-12 20426 Tuolumne Gaylor Lakes 3261 Comment
  CAS-BOT-BC125964  Salix scouleriana John Thomas Howell 1927-2-13 2280 Alameda Strawberry [Canon] Canyon above Britton Grove, south wall 304 Comment
  CAS-BOT-BC126254  Salix scouleriana John Thomas Howell 1960-5-1 35230 Tuolumne Near Pinecrest 1584 Comment
  CAS-BOT-BC129032  Salix scouleriana John Thomas Howell 1961-6-20 36576 Tehama Sulphur Works entrance - Lassen Volcanic National Park 2011 Comment
  SD130419  Salix scouleriana John Thomas Howell 1958-5-24 33268 Inyo Whitney Portal 2530 Comment
  CAS-BOT-BC129099  Salix scouleriana John Thomas Howell 1960-7-20 35730 Plumas Between meadow and forest, Drakesbad - Lassen Volcanic National Park 1828 Comment
  CAS-BOT-BC126429  Salix sitchensis John Thomas Howell 1944-3-26 19346 Marin Point Reyes road beyond Ledum Swamp Comment
  RSA126189  Salix sitchensis J. T. Howell 1947-3-23 23047 Marin Cataract Gulch. Mt. Tamalpais. Comment
  RSA79908  Salpichroa origanifolia J. T. Howell 1945-7-23 21332 San Francisco Golden Gate Park, San Francisco Comment
  SBBG44568  Salsola tragus J. T. Howell 1950-7-11 Kern Mojave Comment
  CAS-BOT-BC180685  Salsola tragus John Thomas Howell 1956-7-29 31742 San Francisco Filled land south of Bayview Hills, San Francisco Comment
  CAS-BOT-BC180702  Salsola tragus John Thomas Howell 1950-11-9 27480 Los Angeles Devil's Gate Dam, Pasadena Comment
  CAS-BOT-BC229979  Salvia mellifera John Thomas Howell 1927-6-8 2460 Orange Southern Puente Hills, in the Santa Ana Canon [Canyon] 213 Comment
  CAS-BOT-BC233290  Salvia mellifera John Thomas Howell 1923-11-12 247 Contra Costa Mt. Diablo Comment
  CAS-BOT-BC233412  Salvia mellifera John Thomas Howell 1928-4-21 3734 Ventura Northern slopes of hills above lagoon at Pt. Mugu 60 Comment
  CAS-BOT-BC238849  Sambucus nigra subsp. caerulea John Thomas Howell 1924-8-10 612 Plumas Crescent Mills 1219 Comment
  CAS-BOT-BC246091  Sambucus nigra subsp. caerulea John Thomas Howell 1927-6-12 2536 San Bernardino Near Cajon Pass on old road to Hesperia, Mojave Desert 1097 Comment
  RSA126183  Sanguisorba minor J. T. Howell 1949-6-7 25341 Marin Aurora School, NW Marin. Comment
  CAS-BOT-BC328138  Santolina chamaecyparissus John Thomas Howell 1956-6-24 31611 San Francisco North side of Bayview Hills, San Francisco Comment
  CAS-BOT-BC466337  Sarcodes sanguinea John Thomas Howell; Gordon H. True 1970-7-14 5561 Sierra Verdi Peak Road ca 3 miles from intersection with Dog Valley--Stampede Dam Road 2346 Comment
  CAS-BOT-BC239872  Schismus arabicus John Thomas Howell 1977-3-11 52348 San Diego Southeast of Agua Caliente, Anza Borrego Deset State Park Comment
  CAS-BOT-BC239905  Schismus arabicus John Thomas Howell 1976-5-18 51702 Kern Kernville 807 Comment
  UCD92913  Schismus arabicus John Thomas Howell; Gordon H. True 1966-3-29 41426 Tulare South of Tulare. Comment
  CAS-BOT-BC111226  Schoenoplectus californicus John Thomas Howell 1927-6-30 2624 Los Angeles In swamp on coastal plain one mile east of Long Beach. 15 Comment
  RSA32524  Schoenoplectus fluviatilis J. T. Howell 1945-6-22 21220 Lake Clear Lake Oaks Comment
  RSA97  Schoenoplectus maritimus J. T. Howell 1927-6-30 237 Orange Bryant Ranch near Long Beach. 15 Comment
  SD134072  Scirpus congdonii John Thomas Howell 1977-8-2 52484 Alpine Mosquito Lake on Ebbetts Pass Road, Canadian Zone. 2438 Comment
  UC1176791  Scirpus microcarpus John Thomas Howell 1946-7-7 Marin Potrero Meadow Mt. Tamalpais, Potrero Meadow Comment
  CAS-BOT-BC111045  Scirpus microcarpus John Thomas Howell 1956-10-28 31940 San Francisco Among willows, Mountain Lake, Presidio. Comment
  CAS-BOT-BC111131  Scirpus microcarpus John Thomas Howell; Gordon H. True 1971-6-16 47979 Tulare <eadpw om Jeffrey pine forest, Claraville. 1920 Comment
  SEINET7592504 Image available Scirpus microcarpus John Thomas Howell 1936-1 12768 Trinity Scott Mts. Comment
  CAS-BOT-BC519011  Scoliopus bigelovii John Thomas Howell 1924-2-23 265 San Mateo King Mountain Comment
  CAS-BOT-BC239968  Scribneria bolanderi John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-5-17 52897 Calaveras Near Wallace 66 Comment
  CAS-BOT-BC240035  Scribneria bolanderi John Thomas Howell 1948-4-18 24209 Sonoma Hills east of Agua Caliente Comment
  CAS-BOT-BC243496  Scribneria bolanderi John Thomas Howell 1954-5-18 29800 Amador 2 miles NNE of Buena Vista, Sierra Nevada 91 Comment
  RSA99655  Scribneria bolanderi J. T. Howell 1953-5-23 29005 Tuolumne Between Long Barn and Pinecrest. 1707 Comment
  SEINET10959759  Scribneria bolanderi John Thomas Howell 1945-5-27 Howell 20879 Marin Serpentine area above Bootjack, Mt. Tamalpais, . Comment
  UCD124822  Scrophularia californica John Thomas Howell 1957-5-6 32206 A San Francisco Hunters Point; San Francisco, California. Comment
  RSA51478  Scrophularia californica var. desertorum J. T. Howell 1949-7-30 25922 Tulare Volcanic cone at Tunnel. 2927 Comment
  CAS-BOT-BC415014  Sedella pumila John Thomas Howell 1976-4-1 51535 Butte Table Mountain, 4 to 5 miles N of Oroville 304 Comment
  RSA98991  Sedella pumila J. T. Howell 1953-5-25 29046 Tuolumne Twain Harte. 1128 Comment
  SD77923  Sedum album John Thomas Howell 1957-8-6 32878 San Francisco Golden Gate Park Comment
  CAS-BOT-BC64191  Sedum obtusatum John Thomas Howell 1944-7-27 16471 Madera Canyon of Middle Fork San Joaquin River, 2743 Comment
  CAS-BOT-BC69065  Sedum radiatum subsp. radiatum John Thomas Howell 1960-6-6 35317 Fresno Kings Canyon road, 8 mi W of Horseshoe Bend/ 1463 Comment
  RSA16  Selaginella bigelovii John Thomas Howell 1927-7-28 506 Orange Nolina Canyon, Rancho Santa Ana 152 Comment
  CAS-BOT-BC496372  Selaginella scopulorum John Thomas Howell 1937-7-26 13521 Siskiyou Salmon-Trinity Alps, Caribou Basin 2286 Comment
  RSA26406  Selaginella wallacei John Thomas Howell 1941-4-5 16163 Napa Franz Valley Comment
  CAS-BOT-BC69030  Selaginella watsonii John Thomas Howell 1946-7-26 22728 Fresno Mono Mesa 3657 Comment
  CAS-BOT-BC340794  Senecio flaccidus var. monoensis John Thomas Howell 1928-4-3 3697 Inyo Wild Rose Canon [Wildrose Canyon] below Wild Rose [Wildrose] Spring, Panamint Mts. Comment
  CAS-BOT-BC363709  Senecio hydrophilus John Thomas Howell 1946-6-13 22029 Marin Chileno Valley Comment
  CAS-BOT-BC363810  Senecio integerrimus var. exaltatus John Thomas Howell 1934-6-14 12158 Lassen Near Lost Lake, Warner Mts. 2438 Comment
  CAS-BOT-BC363932  Senecio integerrimus var. exaltatus John Thomas Howell 1937-7-22 13309 Siskiyou South Fork of Salmon River near Big Flat 1524 Comment
  CAS-BOT-BC363999  Senecio integerrimus var. major John Thomas Howell 1925-6-27 1192 Placer Tahoe Tavern, Lake Tahoe 1889 Comment
  UCD135596  Senecio minimus John Thomas Howell 1944-7-30 19857 Marin Almonte. Comment
  CAS-BOT-BC364132  Senecio mohavensis John Thomas Howell 1928-3-24 3527 Riverside Painted Canon [Canyon], Colorado Desert Comment
  CAS-BOT-BC333013  Senecio scorzonella John Thomas Howell 1942-8-4 17659 Tulare Little Five Lakes Basin Comment
  CAS-BOT-BC333030  Senecio scorzonella John Thomas Howell 1947-8-15 24133 Inyo Fourth Lake, Big Pine Lakes 3291 Comment
  CAS-BOT-BC332930  Senecio spartioides John Thomas Howell 1949-7-30 25910 Tulare Tunnel to Ramshaw Meadow 2712 Comment
  CAS-BOT-BC364335  Senecio triangularis John Thomas Howell 1946-7-15 22390 Inyo Between Mosquito Flat and Ruby Lake, Rock Creek Lake Basin Comment
  CAS-BOT-BC364355  Senecio triangularis John Thomas Howell 1924-6-7 382 Mariposa Along the Merced River, Wawona 1219 Comment
  CAS-BOT-BC364396  Senecio triangularis John Thomas Howell; Gordon H. True 1967-7-11 43365 Plumas Southeast slope of Mt. Hough 2042 Comment
  CAS-BOT-BC364487  Senecio triangularis John Thomas Howell 1949-8-6 26084 Tulare Rock Creek 3200 Comment
  CAS-BOT-BC364378  Senecio triangularis John Thomas Howell 1934-7-17 18453 Nevada West side of Donner Pass near Norden 2133 Comment
  RSA51462  Senecio werneriifolius J. T. Howell 1949-8-5 26067 Inyo Army Pass 3659 Comment
  SEINET208612  Sequoia sempervirens John Thomas Howell 1957-2-3 32020 Marin Fern Canyon Mt.Tamalpais. Comment
  CAS-BOT-BC243544  Setaria parviflora John Thomas Howell 1946-9-8 22997 Marin Phoenix Lake, Mt. Tamalpais Comment
  RSA99633  Setaria pumila J. T. Howell 1954-10-21 30112 Marin Roadside hollow near Bootjack, Mt. Tamalpais Comment
  CAS-BOT-BC240273  Setaria viridis John Thomas Howell; Walter Knight; Irja Knight 1987-5-21 6237 Sonoma Todd Road Preserve 24 Comment
  CAS-BOT-BC216260  Shepherdia argentea John Thomas Howell 1944-8-4 19913 Mono Mono Lake, w. shore Comment
  CAS-BOT-BC213115  Sidalcea John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-5-17 52871 Calaveras Near Fourth Crossing on Hwy. 49, SE of San Andreas Comment
  POM304545  Sidalcea hickmanii subsp. viridis J. T. Howell 1942-6-21 s.n. Marin Carson Ridge Comment
  RSA7439  Sidalcea malviflora subsp. malviflora J. T. Howell 1933-4-9 10974 San Mateo 2 miles N. of Pigeon Pt. Comment
  CAS-BOT-BC179083  Sidalcea oregana subsp. oregana John Thomas Howell 1934-6-30 12286 Modoc Duncan Horse Camp. 1355 Comment
  SEINET3228072  Sidalcea oregana subsp. valida John Thomas Howell 1932-1 Sonoma Comment
  CAS-BOT-BC384487  Silene antirrhina John Thomas Howell 1946-5-12 21795 Marin Carson Ridge Comment
  GH376655  Silene aperta J. T. Howell 1950-7-17 27003 Unknown Trail from Bakeoven to Templeton Meadows 2682 Comment
  CAS-BOT-BC384335  Silene bernardina John Thomas Howell 1946-7-15 22392 Inyo Between Mosquito Flat & Ruby Lake, Rock Creek Lake Basin Comment
  CAS-BOT-BC384554  Silene bridgesii John Thomas Howell 1923-7-9 111 Mariposa Near Stella Lake, Wawona 1219 Comment
  CAS-BOT-BC392460  Silene gallica John Thomas Howell 1964-6-29 40835 San Luis Obispo Near St. Paul's Episcopal Church, Cambria Comment
  UCD98659  Silene gallica John Thomas Howell 1953-6-15 29080 Monterey Santa Lucia Mountains. Hastings reservation. Comment
  CAS-BOT-BC389299  Silene lemmonii John Thomas Howell 1925-7-2 1352 A El Dorado Between Fallen Leaf Camp and Lake Tahoe Comment
  CAS-BOT-BC389384  Silene lemmonii John Thomas Howell 1960-7-20 35715 Plumas Lassen Volcanic National Park. Drakesbad 1828 Comment
  CAS-BOT-BC389609  Silene sargentii John Thomas Howell 1946-8-31 22952 A El Dorado Mt. Tallac 2956 Comment
  CAS-BOT-BC389786  Silene sargentii John Thomas Howell 1947-8-5 23748 Inyo Fifth Lake, Big Pine Lakes 3352 Comment
  CAS-BOT-BC389887  Silene scouleri subsp. scouleri John Thomas Howell 1957-6-30 32799 San Francisco San Francisco. Summit ridge, Bayview Hills Comment
  CAS-BOT-BC75434  Sisymbrium orientale John Thomas Howell 1956-4-22 31264 San Francisco San Francisco. Embarcadero at Powell Street. Comment
  CAS-BOT-BC135354  Sisyrinchium John Thomas Howell 1958-7-30 34140 Fresno Simpson Meadow, Middle Fork of the Kings River - Sierra Nevada 1828 Comment
  SEINET7262148 Image available Solanum umbelliferum J. T. Howell 1931-1 5951 Monterey Stone Canyon Comment
  RSA473646  Solidago californica J. T. Howell 1931-5-25 6541 Santa Barbara Mission Ridge Comment
  CAS-BOT-BC364959  Solidago elongata John Thomas Howell 1958-7-23 33849 Fresno Simpson Meadow, Middle Fork of the Kings River 1828 Comment
  CAS-BOT-BC365603  Solidago elongata John Thomas Howell 1942-7-26 17211 Tulare Mineral King Comment
  CAS-BOT-BC339874  Solidago multiradiata John Thomas Howell 1950-7-21 27143 Tulare Monache Meadows near Soda Creek 2438 Comment
  CAS-BOT-BC365726  Solidago spathulata John Thomas Howell 1956-8-26 31819 San Francisco San Francisco. Near Pine Lake Comment
  CAS-BOT-BC365658  Solidago spathulata John Thomas Howell 1946-8-17 22866 Sonoma Cunningham Marsh Comment
  CAS-BOT-BC365281  Solidago velutina subsp. californica John Thomas Howell 1970-9-21 47230 Tulare Along Hwy. US 99 just northwest of Tagus 79 Comment
  CAS-BOT-BC157286  Sorbus californica John Thomas Howell 1958-8-17 34563 Madera The Niche, East Fork of Granite Creek 2438 Comment
  CAS-BOT-BC390183  Spergularia bocconi John Thomas Howell 1933-5-24 11339 San Francisco Point Lobos, San Francisco Comment
  CAS-BOT-BC390742  Spergularia marina John Thomas Howell; Gordon H. True 1972-6-29 48914 Contra Costa On Byron Hot Springs Road southeast of Byron Comment
  NY482346  Spergularia marina J. T. Howell 1978-4-4 52720 Solano Subsaline flats Bordering Denverton Slough Comment
  CAS-BOT-BC390809  Spergularia marina John Thomas Howell 1930-5-12 4896 Los Angeles 5.5 miles north of Lancaster, Mojave Desert Comment
  CAS-BOT-BC390620  Spergularia rubra John Thomas Howell 1962-7-11 38590 Kern Shirley Meadows, Greenhorn Mountains 2011 Comment
  RSA0098541  Spergularia salina J. T. Howell 1927-6-30 236 Orange Bryant Ranch near Long Beach. 15 Comment
  CAS-BOT-BC149706  Spiraea splendens John Thomas Howell 1977-8-2 52498 Alpine Mosquito Lake on Ebbetts Pass Road 2438 Comment
  CAS-BOT-BC152559  Spiraea splendens John Thomas Howell 1937-7-29 13671 Siskiyou North side of Scott Mt. Comment
  CAS-BOT-BC152777  Spiraea splendens John Thomas Howell 1946-7-15 s.n. Inyo Ruby Lake, Rock Creek Lake Basin Comment
  CAS-BOT-BC235467  Sporobolus indicus John Thomas Howell 1957-8-5 32859 San Francisco San Francisco. Strybing Arboretum, Golden Gate Park Comment
  UC1176920  Stebbinsoseris heterocarpa John Thomas Howell 1946-5-12 Marin Fairfax Country Club Comment
  CAS-BOT-BC391110  Stellaria longipes subsp. longipes John Thomas Howell 1958-7-23 33797 Fresno Simpson Meadow, Middle Fork of the Kings River 1828 Comment
  CAS-BOT-BC391124  Stellaria longipes subsp. longipes John Thomas Howell 1946-7-14 22278 Inyo Mosquito Flat, Rock Creek Lake Basin 3139 Comment
  CAS-BOT-BC393723  Stellaria media John Thomas Howell 1924-5-13 313 Mariposa Wawona 1219 Comment
  CAS-BOT-BC397718  Stellaria nitens John Thomas Howell 1964-4-28 40544 Mariposa just S of Morman Bar on road to Ben Hur 548 Comment
  CAS-BOT-BC181457  Stellaria obtusa John Thomas Howell; Gordon H. True 1965-7-14 2252 Nevada Fall Creek about 5 miles north of Yuba Gap and just east of Lake Bowman Road 1706 Comment
  RSA39941  Stenotus acaulis J. T. Howell 1943-7-17 18465 Nevada Signal Hill, west side of Donner Pass near Norden. 2134 Comment
  CAS-BOT-BC375222  Stephanomeria elata John Thomas Howell 1945-9-2 21456 Marin San Rafael Hills Comment
  CAS-BOT-BC375215  Stephanomeria elata John Thomas Howell 1951-8-21 28285 Yuba Near Camptonville 762 Comment
  JEPS53967  Stephanomeria exigua subsp. coronaria John Thomas Howell 1967-11-6 44187 Kern 3.3 mi from Woody (on road to Glennville); Sierra Nevada, Greenhorn Mountains Comment
  CAS-BOT-BC322972  Stephanomeria tenuifolia John Thomas Howell 1942-7-25 17191 Tulare Eagle Lake Trail near Mineral King Comment
  JEPS74314  Stephanomeria virgata subsp. pleurocarpa John Thomas Howell 1973-11-2 50319 Ventura 7.5 mi from Pine Mt. (summit on road to Ventura, roadside in Sespe Creek Canyon); Sespe Creek Canyon Comment
  RSA438  Stillingia paucidentata J. T. Howell 1927-6-12 128 San Bernardino Near Victorville. 823 Comment
  SEINET10610764  Stipa occidentalis John Thomas Howell 1944-8-6 Howell 20018 Tuolumne Slope north of Tuolumne County. Comment
  CAS-BOT-BC61171  Streptanthus batrachopus John Thomas Howell 1946-6-23 22122 Marin Carson Ridge. Comment
  POM259268  Streptanthus batrachopus J. T. Howell 1939-5-14 s.n. Marin East of Collier Spring, Mount Tamalpais Comment
  GH422180  Streptanthus glandulosus subsp. albidus J. T. Howell 1937-7-5 13097 Unknown Metcalf Road in hills east of Coyote Comment
  UC710413  Streptanthus glandulosus subsp. secundus John Thomas Howell 1943-5-9 17976 Marin San Rafael Hills Comment
  CAS-BOT-BC87774  Streptanthus tortuosus John Thomas Howell 1943-7-21 18659 Placer Donner Pass to Mount Lincoln. Comment
  CAS-BOT-BC519055  Streptopus amplexifolius John Thomas Howell 1943-8-11 19273 Glenn Canyon of Snow Basin Creek Comment
  RSA220057  Stylocline gnaphaloides J. T. Howell 1963-5-7 39246 Monterey San Lorenzo Creek, 6 miles northeast of King City. 183 Comment
  POM261436  Styrax redivivus J. T. Howell 1940-6-30 15589 Lake Soda Bay. Comment
  POM193911  Suaeda moquinii J. T. Howell 1926-6-11 2000 Merced Merced plains, 9 miles sw. of Merced Comment
  RSA54055  Suaeda taxifolia J. T. Howell 1948-7-2 24764 Los Angeles Redondo Beach. Comment
  CAS-BOT-BC88000  Subularia aquatica subsp. americana John Thomas Howell 1940-8-3 15940 Tulare East Lake. Comment
  CAS-BOT-BC271697  Symphoricarpos albus var. laevigatus John Thomas Howell 1924-8-10 607 Plumas Near Greenville 1371 Comment
  CAS-BOT-BC239032  Symphoricarpos rotundifolius John Thomas Howell 1943-7-15 18340 Nevada West side of Donner Pass near Norden 2133 Comment
  CAS-BOT-BC239043  Symphoricarpos rotundifolius John Thomas Howell; Gordon H. True 1969-10-1 46438 Tulare Snake Spring, about 2.5 miles north of Poison Meadow. Kern Plateau 2499 Comment
  JEPS58963  Symphyotrichum ascendens J. Thomas Howell 1963-8-22 40267 Inyo Bishop Comment
  UC517562  Symphyotrichum bracteolatum J. Thomas Howell 1926-7-27 2143 Plumas near Prattville 1463 Comment
  CAS-BOT-BC99129  Symphyotrichum chilense John Thomas Howell 1962-9-26 38935 Kern Sierra Nevada, Greenhorn Mountains - 6.5 miles east of Glennville 1371 Comment
  CAS-BOT-BC99133  Symphyotrichum chilense John Thomas Howell 1933-10-8 11700 Marin 1 mile east of Forest Knolls Comment
  CAS-BOT-BC99135  Symphyotrichum chilense John Thomas Howell 1957-9-15 32956 Marin Slope just above salt marsh bordering Richardson Bay Comment
  CAS-BOT-BC97954  Symphyotrichum frondosum John Thomas Howell; Gordon H. True 1967-9-19 43843 Tulare Flood-plain of Kern River South Fork, Kennedy Meadows Campground. Kern Plateau 1859 Comment
  CAS-BOT-BC99324  Symphyotrichum spathulatum John Thomas Howell 1940-8-2 15888 Tulare Slope north of Reflection Lake 3352 Comment
  JEPS58959  Symphyotrichum spathulatum J. Thomas Howell 1961-9-25 36958 Plumas Portola Sierra Nevada 1478 Comment
  CAS-BOT-BC98891  Symphyotrichum spathulatum var. intermedium John Thomas Howell 1938-8-7 14327 Mono Crooked Creek 2057 Comment
  CAS-BOT-BC98254  Symphyotrichum subulatum var. parviflorum John Thomas Howell 1981-10-13 54624 Sutter Bobelaine Audubon Sanctuary, Feather River at mouth of Bear River 9 Comment
  RSA136754  Systenotheca vortriedei J. T. Howell 1955-7-8 s.n. Monterey Santa Lucia Mountains; Hanging Valley 838 Comment
  CAS-BOT-BC211539  Tamarix parviflora John Thomas Howell 1928-4-3 3680 Inyo Furnace Creek Wash at Death Valley Comment
  RSA244731  Tanacetum camphoratum J. T. Howell 1972-9-6 s.n. San Francisco Just S of the Cliff House. San Francisco. Comment
  CAS-BOT-BC377002  Taraxacum officinale John Thomas Howell; Gordon H. True 1967-8-7 43472 Tulare On Beach Creek just north of Beach Meadow, Kern Plateau 2377 Comment
  CAS-BOT-BC323026  Tetradymia stenolepis John Thomas Howell 1927-7-9 2666 San Bernardino 1 mile west of Deadman's Point, Mojave Desert 914 Comment
  CAS-BOT-BC438242  Tetragonia tetragonoides John Thomas Howell 1963-9-4 40318 Monterey Moss Landing Comment
  CAS-BOT-BC392334  Thalictrum fendleri John Thomas Howell 1948-7-22 24838 Fresno Bubbs Creek Canyon in vicinity of Vidette Meadows 3048 Comment
  CAS-BOT-BC176281  Thamnosma montana John Thomas Howell 1928-1-31 3322 Riverside Rocky soil of Mission Creek Wash, n. Coachella Valley, Colorado Desert 304 Comment
  CAS-BOT-BC197370  Thinopyrum intermedium subsp. barbulatum John Thomas Howell 1978-7-29 53353 Nevada 5 miles north of Truckee on road to Sierraville 1767 Comment
  CAS-BOT-BC197393  Thinopyrum intermedium subsp. barbulatum John Thomas Howell; Gordon H. True 1971-7-16 48628 Tulare Near Redwood Meadow Creek, about 2 miles west of Johnsondale 2072 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-BC207187  Thinopyrum intermedium subsp. intermedium John Thomas Howell 1978-7-29 53354 Nevada 5 miles north of Truckee on road to Sierraville - Sierra Nevada 1767 Comment
  UCD93342  Thinopyrum ponticum John Thomas Howell 1973-7-25 50016 Merced Ingomar. 30 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-BC88411  Thysanocarpus curvipes John Thomas Howell 1945-6-18 21006 Lake Bartlett Mountain. Sawmill Flat. 1219 Comment
  CAS-BOT-BC67109  Thysanocarpus laciniatus John Thomas Howell 1933-4-23 11124 San Benito The Pinnacles. Comment
  CAS-BOT-BC67060  Thysanocarpus laciniatus John Thomas Howell 1957-4-28 32055 Monterey Near Hastings Reservation. 594 Comment
  CAS-BOT-BC67226  Thysanocarpus laciniatus John Thomas Howell; Gordon H. True 1968-5-13 44332 Tulare Sierra Nevada. Kern Plateau. Cherry Hill Road at Rincon Trail, Brush Creek Canyon. 1463 Comment
  CAS-BOT-BC447618  Tolmiea menziesii John Thomas Howell 1943-8-9 19223 Glenn Plaskett Meadows 1828 Comment
  GH355421  Torreya californica J. T. Howell 1972-4-25 48715 Unknown Merced River canyon, 1 mile from Arch Rock on road to Cascade Falls 914 Comment
  RSA384710  Torreya californica J. T. Howell 1948-5-16 24304 Marin Near top of Eldridge Grade, Mount Tamalpais Comment
  UCR143029  Torreya californica J. T. Howell 1948-5-16 24303 Marin Mt. Tamalpais, near top of Eldridge Grade Comment
  NY20768  Torreya californica J. T. Howell 1948-5-16 24303 Marin 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
  UCD93197  Torreyochloa pallida var. pauciflora John Thomas Howell 1958-8-17 34540 Madera Cora Lake. 2560 Comment
  SEINET10793102  Torreyochloa pallida var. pauciflora John Thomas Howell 1946-6-13 Howell 22027 Marin Chileno Valley Comment
  CAS-BOT-BC169197  Toxicodendron diversilobum John Thomas Howell; Alice Eastwood 1938-5-17 5651 Lake Near Upper Lake Comment
  CAS-BOT-BC172926  Toxicodendron diversilobum John Thomas Howell 1962-6-15 37445 Butte Magalia 731 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-BC111160  Trichophorum clementis John Thomas Howell 1944-8-8 20108 Tuolumne Elizabeth Lake Comment
  UC710587  Trichophorum clementis John Thomas Howell 1944-8-12 20351 Tuolumne Gaylor Lakes 3200 Comment
  CAS-BOT-BC221035  Trichostema austromontanum subsp. austromontanum John Thomas Howell; Gordon H. True 1967-9-19 43864 Tulare Flood-plain of Kern River South Fork. Kennedy Meadows Campground. Kern Plateau 1859 Comment
  UC1177208  Trifolium albopurpureum var. dichotomum John Thomas Howell 1943-5-2 17932 Marin Big Carson Canyon Comment
  UCD111197  Trifolium hirtum John Thomas Howell 1966-5-8 41530 San Mateo At junction of Millbrae Ave. and Bayshore Freeway, Millbrae. Comment
  UC866961  Trifolium kingii var. productum John Thomas Howell 1938-8-2 13995 Placer 5 mi n Brockway Comment
  UC1106239  Trifolium microdon John Thomas Howell 1940-5-20 15506 Marin Point Reyes Comment
  RSA223621  Trifolium microdon J. T. Howell 32532 San Francisco North side of Lone Mountain Comment
  JEPS33667  Trifolium oliganthum John Thomas Howell 1926-4-18 1907 Santa Clara Uvas Canyon Comment
  UC1106242  Trifolium oliganthum John Thomas Howell 1947-4-27 23080 Marin w San Anselmo; Bald Mtn Comment
  RSA91574  Trifolium productum J. T. Howell 13402 Siskiyou Caribou Basin, Salmon-Trinity Alps 1982 Comment
  CAS-BOT-BC451832  Triglochin maritima John Thomas Howell 1944-4-23 19393 Marin Escalle salt marsh Comment
  CAS-BOT-BC451953  Triglochin maritima John Thomas Howell 1950-7-18 27048 Tulare Bakeoven Meadows, South Fork of Kern River 2468 Comment
  CAS-BOT-BC451852  Triglochin maritima John Thomas Howell 1945-6-30 21256 Marin Marsh bordering Bolinas Lagoon, Stinson Beach Comment
  CAS-BOT-BC451965  Triglochin striata John Thomas Howell 1946-7-4 22178 Marin Dillons Beach Comment
  CAS-BOT-BC133468  Trillium ovatum John Thomas Howell 1939-8-3 15020 Siskiyou Spirit Lake, Marble Mts. 1828 Comment
  CAS-BOT-BC238534  Triphysaria floribunda John Thomas Howell 1957-5-6 32222 San Francisco San Francisco. Hunters Point Comment
  CAS-BOT-BC200117  Trisetum canescens John Thomas Howell; Gordon H. True 1971-7-13 48380 Tulare At south-west end of Big Meadow, Kern Plateau 2438 Comment
  GH361171  Trisetum canescens J. T. Howell 1940-5-12 Unknown Chianti Country Comment
  CAS-BOT-BC193533  Trisetum spicatum John Thomas Howell 1951-6-28 27725 Plumas Eureka Peak 2255 Comment
  CAS-BOT-BC200278  Trisetum spicatum John Thomas Howell 1942-7-26 17232 Tulare Mineral King Comment
  CAS-BOT-BC519134  Triteleia hyacinthina John Thomas Howell 1925-7-2 1360 El Dorado Between Fallen Leaf Camp and Lake Tahoe Comment
  CAS-BOT-BC521545  Triteleia hyacinthina John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-5-17 52921 Calaveras Upper Sonoran foothills, Camanche Parkway South between Burson Road and Camanche Reservoir 152 Comment
  CAS-BOT-BC525749  Triteleia ixioides subsp. scabra John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-6-26 53041 Calaveras Sierra Nevada, near Dorrington 1524 Comment
  POM203716  Triteleia laxa J. T. Howell 1931-5-12 6468 Contra Costa Oakland Hills Comment
  CAS-BOT-BC527554  Triteleia montana John Thomas Howell; Gordon H. True No date on label 43374 Plumas About 2 miles southeast of Mt. Hough 1828 Comment
  UC1106124  Triticum aestivum John Thomas Howell 1944-6-25 Marin San Rafael; along railroad Comment
  CAS-BOT-BC67440  Tropidocarpum gracile John Thomas Howell 1983-4-21 s.n. Kern Sierra Nevada. Kernville. Comment
  CAS-BOT-BC91157  Umbellularia californica John Thomas Howell 1947-3-2 23043 Marin Mount Tamalpais. Above Phoenix Lake. Comment
  SBBG50221  Umbellularia californica var. californica J. T. Howell 1954-5-10 Fresno between Mountain Lake and Auberry 1097 Comment
  CAS-BOT-BC381817  Uropappus lindleyi John Thomas Howell 1978-4-17 52825 Butte Skyway near Neal Road, Paradise 609 Comment
  CAS-BOT-BC403947  Urtica dioica subsp. gracilis John Thomas Howell 1943-10-3 19335 Marin Canyon just below Muir Woods Comment
  CAS-BOT-BC404084  Urtica dioica subsp. holosericea John Thomas Howell 1948-7-29 25175 Fresno Bubbs Creek Canyon 2834 Comment
  CAS-BOT-BC404105  Urtica dioica subsp. holosericea John Thomas Howell 1960-3-25 35165 Kern Cane Brake Creek, w. side Walker Pass 1341 Comment
  CAS-BOT-BC404168  Urtica dioica subsp. holosericea John Thomas Howell 1965-9-15 41397 Mono Coleville 1755 Comment
  CAS-BOT-BC240361  Utricularia minor John Thomas Howell; Gordon H. True 1970-6-26 46894 Tulare Salmon Creek, west side of Big Meadow, Kern Plateau 2377 Comment
  A363154  Vaccinium cespitosum J. T. Howell 1946-7-15 22414 Unknown Ruby Lake, Rock Creek Lake Basin 3383 Comment
  CAS-BOT-BC199164  Vaccinium cespitosum John Thomas Howell; Gordon True; Walter Knight; Irja Knight 1968-6-11 2406 Plumas Butterfly Botanical Area. Southeast end of Pond reservoir Comment
  UC750731  Vaccinium cespitosum John Thomas Howell 1946-7-15 22414 Inyo Ruby Lake Rock Creek Lake Basin 3383 Comment
  CAS-BOT-BC193406  Vaccinium shastense subsp. nevadense John Thomas Howell 1955-6-5 30278 Tuolumne South Fork Stanislaus River - Sierra Nevada 914 Comment
  CAS-BOT-BC199507  Vaccinium uliginosum John Thomas Howell 1943-7-24 18773 Nevada Frog Lake Comment
  CAS-BOT-BC5108  Velaea glauca var. purpurascens John Thomas Howell 1937-7-30 13697 A Trinity About 7 miles from Trinity Center on road to Minersville Comment
  RSA654  Verbena lasiostachys J. T. Howell 1927-7-19 448 Orange Santa Ana River bottom, Rancho Santa Ana. 152 Comment
  CAS-BOT-BC327024  Verbesina encelioides John Thomas Howell 1928-5-20 3818 Ventura Camarillo Comment
  RSA218008  Vicia angustifolia J. T. Howell 1956-4-22 31263 San Francisco San Francisco. Waste ground near Fishermans Wharf. Comment
  UC750599  Vicia benghalensis John Thomas Howell 1945-5-20 Marin Tiburon Comment
  RSA88312  Vicia villosa J. T. Howell 1953-5-23 29002 Tuolumne Roadside between Sonora and Tuolumne. Comment
  CAS-BOT-BC263844  Viola John Thomas Howell 1967-6-23 42705 Plumas Butterfly Valley 1066 Comment
  CAS-BOT-BC263934  Viola adunca John Thomas Howell 1943-8-4 19040 Glenn Summit ridge N of Black Butte Comment
  CAS-BOT-BC270160  Viola pinetorum var. grisea John Thomas Howell 1963-7-12 39850 El Dorado Meyers 1935 Comment
  CAS-BOT-BC270131  Viola pinetorum var. grisea John Thomas Howell 1928-5-26 3845 Ventura Chula Vista Camp, Mount Pinos Comment
  CAS-BOT-BC175694  Viola purpurea var. purpurea John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-6-27 53096 Alpine Between Pacific and Hermit Valleys on Ebbetts Pass road 2133 Comment
  RSA469  Vitis girdiana J. T. Howell 1927-7-6 282 Orange Santa Ana River bottom, Rancho Santa Ana 152 Comment
  UCD93679  Vulpia microstachys John Thomas Howell; Gordon H. True 1973-5-12 49202 Lassen Elysian Valley NW of Janesville. 1325 Comment
  CAS-BOT-BC183160  Vulpia microstachys var. ciliata John Thomas Howell 1943-5-2 17930 Marin Big Carson Canyon Comment
  CAS-BOT-BC199937  Vulpia microstachys var. ciliata John Thomas Howell 1952-4-22 28307 Alameda Tesla Hills w. of Corral Hollow Comment
  CAS-BOT-BC183781  Vulpia microstachys var. confusa John Thomas Howell 1943-5-11 18022 Lake 1 mile south of Lakeport Comment
  CAS-BOT-BC184264  Vulpia microstachys var. pauciflora John Thomas Howell 1948-4-26 24264 Kern 2 miles north of Mohave [Mojave] Comment
  CAS-BOT-BC184357  Vulpia microstachys var. pauciflora John Thomas Howell 1967-5-5 42170 Marin John Thomas Howell Botanical Garden, Tiburon Comment
  CAS-BOT-BC184490  Vulpia microstachys var. pauciflora John Thomas Howell 1956-5-6 31347 San Francisco Sierra & 22nd Sts., San Francisco Comment
  CAS-BOT-BC184581  Vulpia microstachys var. pauciflora John Thomas Howell 1960-8-22 36348 Shasta Manzanita Lake 1783 Comment
  CAS-BOT-BC184620  Vulpia microstachys var. pauciflora John Thomas Howell; Gordon H. True 1968-5-12 44205 Tulare Brush Creek Canyon, Kern Plateau 1402 Comment
  GH341894  Vulpia microstachys var. pauciflora J. T. Howell 1938-4-10 13751 Unknown Hospital Canyon Comment
  SEINET199931 Image available Vulpia microstachys var. pauciflora John Thomas Howell 20801 Marin San Rafael Hills. Comment
  UCD94548  Vulpia microstachys var. pauciflora John Thomas Howell 1962-7-9 38338 Kern Isabella. 762 Comment
  CAS-BOT-BC184710  Vulpia myuros subsp. megalura John Thomas Howell; Barbara T. Menzies; Roberta Shockey 1978-5-17 52878 Calaveras Near Wallace 66 Comment
  CAS-BOT-BC185677  Vulpia myuros subsp. megalura John Thomas Howell; Gordon H. True; Walter Knight; Irja Knight 1967-6-12 2007 Plumas Butterfly Botanical Area and Vicinity 1127 Comment
  CAS-BOT-BC178593  Vulpia myuros var. myuros John Thomas Howell 1967-3-14 42039 Monterey On San Simeon Hwy. at Pt. Sur Comment
  CAS-BOT-BC73638  Woodsia oregana John Thomas Howell 1964-5-11 40707 Shasta Lava flow just north of Hot Creek P.O. Comment
  CAS-BOT-BC77765  Woodsia scopulina John Thomas Howell 1949-7-24 25699 Tulare Primrose Lake 3505 Comment
  CAS-BOT-BC77898  Woodwardia fimbriata John Thomas Howell 1956-9-9 31871 San Francisco West end of Lake Merced Comment
  CAS-BOT-BC383184  Wyethia angustifolia John Thomas Howell 1957-5-17 32284 San Francisco San Francisco. Bayview Hills Comment
  CAS-BOT-BC383567  Wyethia mollis John Thomas Howell; Gordon H. True 1969-6-23 45815 Plumas 2 miles north of Nelson Point on road to Quincy 1310 Comment
  CAS-BOT-BC383808  Xanthium strumarium John Thomas Howell 1974-9-19 50882 Sutter 1.7 miles south of Robbins on road to Knights Landing 7 Comment
  CAS-BOT-BC196886  Xylococcus bicolor John Thomas Howell 1977-3-9 52317 San Diego North of Escondido on highway to Temecula Comment
  CAS-BOT-BC527199  Zigadenus micranthus John Thomas Howell 1955-6-13 30360 Trinity Peanut 762 Comment
  CAS-BOT-BC534276  Zigadenus venenosus John Thomas Howell 1958-8-13 34385 Madera Near Isberg Lake 2987 Comment
  CAS-BOT-BC59373  Ziziphus parryi var. parryi John Thomas Howell 1928-3-9 3390 San Bernardino West end of Morongo Valley, s. Mojave Desert 914 Comment
  CAS-BOT-BC454192  Zostera pacifica John Thomas Howell 1947-6-18 23274 Marin Dillons Beach Comment



  Copyright © 2019 Regents of the University of California — Updated 11 January 2019
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