Search Results — 513 specimen records retrieved (224 records with coordinates)
Results for search: County=CONTRA COSTA; Source=All; Collector=Howell;   

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 Please cite data retrieved from this page: Data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/cch_archive/).
 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-BC104164  Quercus X morehus John Thomas Howell 1925-10-11 1503 Contra Costa Chaparral, Moraga Ridge, Oakland Hills Comment
  CAS-BOT-BC104707  Quercus wislizeni John Thomas Howell 1950-6-5 26637 Contra Costa Nortonville Comment
  CAS-BOT-BC11024  Dendromecon rigida John Thomas Howell 1925-10-11 1497 Contra Costa Moraga Ridge, Oakland Hills Comment
  CAS-BOT-BC114612  Cyperus eragrostis John Thomas Howell; Gordon H. True 1972-6-29 48936 Contra Costa Along ditches on Byron Hot Springs Road SE of Byron. Comment
  CAS-BOT-BC116456  Delphinium patens subsp. patens J. T. Howell 1933-5-14 11279 Contra Costa Hills east of St. Mary's College Comment
  CAS-BOT-BC132506  Calochortus pulchellus John Thomas Howell 1940-4-21 15397 Contra Costa Pine Canyon, Mt. Diablo Comment
  CAS-BOT-BC132534  Calochortus umbellatus John Thomas Howell 1933-5-14 11261 Contra Costa Hills east of St. Mary's College Comment
  CAS-BOT-BC137970  Alopecurus saccatus John Thomas Howell 1953-4-26 28936 Contra Costa Between Byron and Byron Hot Springs. Comment
  CAS-BOT-BC143647  Heteromeles arbutifolia John Thomas Howell 1925-10-11 1494 Contra Costa Moraga Ridge, Oakland Hills Comment
  CAS-BOT-BC147410  Rosa californica John Thomas Howell; Gordon H. True 1972-6-29 48930 Contra Costa Byron Hot Springs southeast of Byron Comment
  CAS-BOT-BC148107  Rosa gymnocarpa John Thomas Howell 1925-9-27 1485 Contra Costa San Leandro Canyon, Oakland Hills Comment
  CAS-BOT-BC154333  Phacelia phacelioides John Thomas Howell 1978-5-4 52870 Contra Costa Burned area in chaparral near summit, Mt. Diablo 1066 Comment
  CAS-BOT-BC157455  Solanum umbelliferum J. T. Howell 1933-5-14 11291 Contra Costa Hills east of St. Mary's College Comment
  CAS-BOT-BC163672  Clarkia purpurea subsp. quadrivulnera John Thomas Howell 1931-5-12 6483 Contra Costa Mt. Diablo Comment
  CAS-BOT-BC16379  Barbarea orthoceras John Thomas Howell 1976-5-20 s.n. Contra Costa Mount Diablo. Below Juniper Camp. Comment
  CAS-BOT-BC166166  Epilobium canum subsp. canum John Thomas Howell 1925-11-1 1536 Contra Costa Moraga Ridge, Oakland Hills Comment
  CAS-BOT-BC168924  Ribes malvaceum John Thomas Howell 1923-11-12 243 Contra Costa Mt. Diablo Comment
  CAS-BOT-BC168925  Ribes malvaceum John Thomas Howell 1926-3-7 1667 Contra Costa Mt. Diablo Comment
  CAS-BOT-BC169516  Corylus cornuta subsp. californica John Thomas Howell 1925-9-19 1456 Contra Costa Moraga Ridge, Oakland Hills Comment
  CAS-BOT-BC172934  Toxicodendron diversilobum John Thomas Howell 1933-5-14 11289 Contra Costa Hills east of St. Mary's College Comment
  CAS-BOT-BC17454  Athysanus pusillus John Thomas Howell 1926-3-7 1677 Contra Costa Mount Diablo. Comment
  CAS-BOT-BC17456  Athysanus pusillus John Thomas Howell 1931-3-10 5754 Contra Costa East side of Mount Diablo 7 miles from Clayton on Livermore Road. Comment
  CAS-BOT-BC17457  Athysanus pusillus John Thomas Howell 1931-3-10 5754 Contra Costa East side of Mount Diablo 7 miles from Clayton on Livermore Road. Comment
  CAS-BOT-BC183936  Vulpia microstachys var. microstachys John Thomas Howell 1942-5-24 16963 Contra Costa Near Deer Flat, Mt. Diablo Comment
  CAS-BOT-BC19203  Carex barbarae John Thomas Howell 1933-5-14 11236 Contra Costa St. Mary's College. Comment
  CAS-BOT-BC192679  Deschampsia danthonioides John Thomas Howell 1953-4-26 28937 Contra Costa Between Byron and Byron Hot Springs Comment
  CAS-BOT-BC197108  Echinochloa crus-galli John Thomas Howell; Gordon H. True 1972-6-29 48942 Contra Costa Along Byron Hot Springs Road where water has stood, southeast of Byron Comment
  CAS-BOT-BC199244  Vaccinium ovatum John Thomas Howell 1925-9-12 1435 Contra Costa Oakland Hills at head of San Leandro Canyon Comment
  CAS-BOT-BC200623  Garrya elliptica John Thomas Howell 1926-1-16 1625 Contra Costa Head of San Leandro Canyon, Oakland Hills Comment
  CAS-BOT-BC200634  Garrya elliptica John Thomas Howell 1925-9-12 1437 Contra Costa Oakland Hills at head of San Leandro Canyon Comment
  CAS-BOT-BC204098  Malacothamnus hallii John Thomas Howell; T. H. Kearney 1950-7-5 26634 Contra Costa Mt. Diablo 259 Comment
  CAS-BOT-BC206018  Ribes menziesii John Thomas Howell 1942-4-26 16951 Contra Costa Oakland Hills near Redwood Peak Comment
  CAS-BOT-BC206331  Malacothamnus fremontii John Thomas Howell; T. H. Kearney 1950-7-5 26635 Contra Costa Nortonville. Comment
  CAS-BOT-BC206332  Malacothamnus fremontii John Thomas Howell; T. H. Kearney 1950-7-5 26635 Contra Costa Hills above Nortonville. Comment
  CAS-BOT-BC206333  Malacothamnus fremontii John Thomas Howell; T. H. Kearney 1950-7-5 26635 Contra Costa Nortonville. Comment
  CAS-BOT-BC206334  Malacothamnus fremontii John Thomas Howell; T. H. Kearney 1950-7-5 26635 Contra Costa Nortonville. Comment
  CAS-BOT-BC20852  Carex globosa John Thomas Howell 1953-3-15 28923 Contra Costa Rock City, Mt. Diablo. Comment
  CAS-BOT-BC208656  Distichlis spicata John Thomas Howell; Gordon H. True 1972-6-29 48925 Contra Costa Byron Hot Springs Road southeast of Byron Comment
  CAS-BOT-BC209362  Ribes sanguineum var. glutinosum John Thomas Howell 1925-9-12 1438 Contra Costa San Leandro Canyon, Oakland Hills Comment
  CAS-BOT-BC221679  Monardella douglasii John Thomas Howell 1942-7-19 17049 Contra Costa NE. of Deer Flat, Mt. Diablo Comment
  CAS-BOT-BC224751  Calystegia malacophylla subsp. pedicellata John Thomas Howell 1942-5-24 16964 Contra Costa Near Deer Flat, Mt. Diablo Comment
  CAS-BOT-BC22970  Agoseris heterophylla John Thomas Howell 1933-5-14 11260 Contra Costa Hills east of St. Mary's College Comment
  CAS-BOT-BC22971  Agoseris heterophylla John Thomas Howell 1933-5-14 11260 Contra Costa Hills east of St. Mary's College Comment
  CAS-BOT-BC231714  Solanum umbelliferum John Thomas Howell 1926-3-7 1666 Contra Costa Mt. Diablo Comment
  CAS-BOT-BC233290  Salvia mellifera John Thomas Howell 1923-11-12 247 Contra Costa Mt. Diablo Comment
  CAS-BOT-BC23596  Arctostaphylos crustacea John Thomas Howell 1925-9-19 1446 Contra Costa Moraga Ridge, Oakland Hills Comment
  CAS-BOT-BC240009  Scribneria bolanderi John Thomas Howell 1953-3-15 28924 Contra Costa Rock City, Mt. Diablo Comment
  CAS-BOT-BC240417  Lonicera hispidula John Thomas Howell 1925-10-11 1489 Contra Costa Moraga Ridge, Oakland Hills Comment
  CAS-BOT-BC24119  Arctostaphylos auriculata John Thomas Howell 1931-5-12 6477 Contra Costa Nortonville Comment
  CAS-BOT-BC243541  Setaria parviflora John Thomas Howell; Gordon H. True 1972-6-29 48933 Contra Costa Along ditches on Byron Hot Springs Road southeast of Byron Comment
  CAS-BOT-BC24660  Arctostaphylos glauca John Thomas Howell 1926-3-7 1674 Contra Costa Mt. Diablo. Comment
  CAS-BOT-BC246644  Poa howellii John Thomas Howell 1933-5-14 11256 Contra Costa Hills east of St. Mary's College Comment
  CAS-BOT-BC250683  Phalaris paradoxa John Thomas Howell 1933-5-14 11235 Contra Costa St. Mary's College Comment
  CAS-BOT-BC259723  Paspalum distichum John Thomas Howell; Gordon H. True 1972-6-29 48941 Contra Costa Along Byron Hot Springs Road, SE of Byron 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-BC265962  Phalaris minor John Thomas Howell 1933-5-14 11234 Contra Costa St. Mary's College Comment
  CAS-BOT-BC267440  Eriogonum truncatum John Thomas Howell 1934-4-8 11816 Contra Costa 10 miles from Clayton on Marsh Creek road Comment
  CAS-BOT-BC267441  Eriogonum truncatum John Thomas Howell 1934-4-8 11816 Contra Costa 10 miles from Clayton on Marsh Creek Road 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-BC26795  Cordylanthus nidularius John Thomas Howell 1942-7-19 17044 Contra Costa NE of Deer Flat, Mt. Diablo Comment
  CAS-BOT-BC279198  Centromadia pungens subsp. pungens John Thomas Howell; Gordon H. True 1972-6-29 48920 Contra Costa On Byron Hot Springs Road southeast of Byron Comment
  CAS-BOT-BC279205  Centromadia pungens subsp. pungens John Thomas Howell 1930-9-28 5489 Contra Costa 2 miles from Concord on road to Walnut Creek Comment
  CAS-BOT-BC281257  Hordeum brachyantherum subsp. brachyantherum John Thomas Howell 1933-5-14 11229 Contra Costa St. Mary's College Comment
  CAS-BOT-BC287535  Ericameria linearifolia John Thomas Howell 1926-3-7 1673 Contra Costa Mt Diablo Comment
  CAS-BOT-BC288540  Centromadia fitchii John Thomas Howell 1930-9-28 5497 Contra Costa 6.3 miles from Byron on the Marsh Creek Rd Comment
  CAS-BOT-BC295718  Erigeron petrophilus var. petrophilus John Thomas Howell 1923-11-12 249 Contra Costa Mt. Diablo Comment
  CAS-BOT-BC300926  Eriophyllum jepsonii John Thomas Howell 1950-7-5 26636 Contra Costa Above Nortonville Comment
  CAS-BOT-BC300968  Eriophyllum lanatum var. achilleoides John Thomas Howell 1923-11-12 244 Contra Costa Mt. Diablo Comment
  CAS-BOT-BC30109  Chrysolepis chrysophylla var. minor John Thomas Howell 1925-9-19 1442 Contra Costa Moraga Ridge, Oakland Hills Comment
  CAS-BOT-BC305320  Helianthella castanea John Thomas Howell 1940-4-21 15398 Contra Costa Pine Canyon, Mt. Diablo Comment
  CAS-BOT-BC305325  Helianthella castanea John Thomas Howell 1933-5-14 11282 Contra Costa Hills east of St. Mary's College Comment
  CAS-BOT-BC305326  Helianthella castanea John Thomas Howell 1931-5-12 6475 Contra Costa Nortonville Comment
  CAS-BOT-BC305327  Helianthella castanea John Thomas Howell 1931-5-12 6475 Contra Costa Nortonville Comment
  CAS-BOT-BC305328  Helianthella castanea John Thomas Howell 1931-5-12 6475 Contra Costa Nortonville Comment
  CAS-BOT-BC310192  Hesperevax sparsiflora var. sparsiflora John Thomas Howell 1933-5-14 11259 Contra Costa Hills east of St. Mary's College Comment
  CAS-BOT-BC314864  Hemizonia congesta subsp. luzulifolia John Thomas Howell 1930-9-28 5488 Contra Costa 2 miles from Concord on road to Walnut Creek 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-BC327246  Layia hieracioides John Thomas Howell 1940-4-21 15405 Contra Costa Pine Canyon, Mt. Diablo Comment
  CAS-BOT-BC32964  Cordylanthus nidularius John Thomas Howell 1942-7-19 17044 Contra Costa NE of Deer Flat, Mt. Diablo Comment
  CAS-BOT-BC32965  Cordylanthus nidularius John Thomas Howell 1942-7-19 17044 Contra Costa NE of Deer Flat, Mt. Diablo Comment
  CAS-BOT-BC331614  Acer macrophyllum John Thomas Howell 1926-3-7 1661 Contra Costa Mt. Diablo near toll gate Comment
  CAS-BOT-BC342120  Logfia filaginoides John Thomas Howell 1940-4-21 15406 Contra Costa Pine Canyon, Mt. Diablo Comment
  CAS-BOT-BC342982  Madia gracilis John Thomas Howell 1933-5-14 11266 Contra Costa Hills east of St. Mary's College Comment
  CAS-BOT-BC352771  Lasthenia glabrata subsp. glabrata John Thomas Howell 1933-5-14 11240 Contra Costa St. Mary's College Comment
  CAS-BOT-BC361879  Psilocarphus tenellus John Thomas Howell 1933-5-14 11230 Contra Costa St. Mary's College Comment
  CAS-BOT-BC364902  Solidago velutina subsp. californica John Thomas Howell 1925-10-20 1525 Contra Costa Moraga Ridge Comment
  CAS-BOT-BC37392  Cardamine californica John Thomas Howell 1931-3-10 5757 Contra Costa East side of Mount Diablo 7 miles from Clayton. Comment
  CAS-BOT-BC37393  Cardamine californica John Thomas Howell 1931-3-10 5757 Contra Costa East side of Mount Diablo 7 miles from Clayton on Livermore road. Comment
  CAS-BOT-BC37394  Cardamine californica John Thomas Howell 1933-5-14 11255 Contra Costa Hills east of Saint Mary's College. Comment
  CAS-BOT-BC375205  Stephanomeria elata John Thomas Howell 1925-11-1 1544 Contra Costa Moraga Ridge, Oakland Hills Comment
  CAS-BOT-BC382869  Wyethia angustifolia John Thomas Howell 1933-5-14 11286 Contra Costa Hills east of St. Mary's College Comment
  CAS-BOT-BC383367  Wyethia helenioides John Thomas Howell 1933-5-14 11287 Contra Costa Hills east of St. Mary's College Comment
  CAS-BOT-BC383368  Wyethia helenioides John Thomas Howell 1933-5-14 11287 Contra Costa Hills east of St. Mary's College Comment
  CAS-BOT-BC383369  Wyethia helenioides John Thomas Howell 1933-5-14 11288 Contra Costa Hills east of St. Mary's College Comment
  CAS-BOT-BC383370  Wyethia helenioides John Thomas Howell 1933-5-14 11287 Contra Costa Hills east of St. Mary's College Comment
  CAS-BOT-BC384137  Forestiera pubescens subsp. parvifolia John Thomas Howell 1933-3-29 10905 Contra Costa Canyon below Nortonville Comment
  CAS-BOT-BC38881  Arctostaphylos manzanita subsp. laevigata J. T. Howell 1926-3-7 1665 Contra Costa Mt. Diablo 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
  CAS-BOT-BC392088  Aquilegia formosa John Thomas Howell 1933-5-14 11253 Contra Costa Hills east of St. Mary's College Comment
  CAS-BOT-BC422910  Stylomecon heterophylla John Thomas Howell 1933-5-14 11269 Contra Costa Hills east of St. Mary's College Comment
  CAS-BOT-BC428218  Dudleya cymosa subsp. paniculata John Thomas Howell 1942-5-24 16967 A Contra Costa Eagle Peak, Mt. Diablo Comment
  CAS-BOT-BC430619  Lithophragma affine John Thomas Howell 1933-5-14 11280 Contra Costa Hills east of St. Mary's College Comment
  CAS-BOT-BC435650  Lithophragma heterophyllum John Thomas Howell 1926-3-7 1660 Contra Costa Mt. Diablo near toll gate Comment
  CAS-BOT-BC436386  Calystegia subacaulis John Thomas Howell 1933-5-14 11270 Contra Costa Hills east of St. Mary's College Comment
  CAS-BOT-BC436989  Acaena pinnatifida var. californica John Thomas Howell 1933-5-14 11285 Contra Costa Hills east of St. Mary's College Comment
  CAS-BOT-BC438374  Calandrinia ciliata John Thomas Howell 1940-4-21 15407 Contra Costa Pine Canyon, Mt. Diablo Comment
  CAS-BOT-BC439167  Claytonia exigua subsp. exigua John Thomas Howell 1926-3-7 1676 Contra Costa Mt. Diablo Comment
  CAS-BOT-BC439440  Claytonia parviflora subsp. parviflora John Thomas Howell 1933-5-14 11252 Contra Costa Hills east of St. Mary's College Comment
  CAS-BOT-BC440075  Claytonia perfoliata subsp. perfoliata John Thomas Howell 1931-3-10 5755 Contra Costa East side of Mt. Diablo 7 miles from Clayton on Livermore road Comment
  CAS-BOT-BC440076  Claytonia perfoliata subsp. perfoliata John Thomas Howell 1933-5-14 11273 Contra Costa Hills east of St. Mary's College Comment
  CAS-BOT-BC440077  Claytonia perfoliata subsp. perfoliata John Thomas Howell 1931-3-10 5755 Contra Costa East side of Mt. Diablo 7 miles from Clayton on Livermore road Comment
  CAS-BOT-BC445038  Montia linearis John Thomas Howell 1933-5-14 11226 Contra Costa St. Mary's College Comment
  CAS-BOT-BC45655  Quercus agrifolia John Thomas Howell 1950-7-5 26638 Contra Costa Nortonville Comment
  CAS-BOT-BC45656  Quercus agrifolia John Thomas Howell 1950-7-5 26638 Contra Costa Nortonville Comment
  CAS-BOT-BC45657  Quercus agrifolia John Thomas Howell 1926-12-27 2274 Contra Costa Near Oakley Comment
  CAS-BOT-BC48832  Ceanothus cuneatus John Thomas Howell 1926-3-7 1664 Contra Costa Mt. Diablo on old wagon road Comment
  CAS-BOT-BC62921  Frangula californica subsp. tomentella John Thomas Howell 1930-9-28 5490 Contra Costa Marsh Creek Rd., e. of Clayton. Comment
  CAS-BOT-BC78295  Pinus attenuata John Thomas Howell 1925-9-19 1443 Contra Costa Moraga Ridge, Oakland Hills Comment
  CAS-BOT-BC80264  Sequoia sempervirens John Thomas Howell 1927-2-6 2279 Contra Costa San Leandro [Canon] Canyon at Pinehurst 152 Comment
  CAS-BOT-BC80265  Sequoia sempervirens John Thomas Howell 1925-10-11 1500 Contra Costa Moraga Ridge, Oakland Hills Comment
  CAS-BOT-BC80924  Juniperus californica John Thomas Howell 1923-11-13 239 Contra Costa Mt. Diablo 914 Comment
  CAS-BOT-BC86648  Quercus douglasii John Thomas Howell 1926-3-7 1658 Contra Costa Mt. Diablo near toll gate Comment
  CAS-BOT-BC87097  Streptanthus glandulosus subsp. glandulosus John Thomas Howell 1942-5-24 16965 Contra Costa Near Deer Flat, Mount Diablo. Comment
  CAS-BOT-BC87098  Streptanthus glandulosus subsp. glandulosus John Thomas Howell 1942-7-19 17048 Contra Costa Northeast of Deer Flat, Mount Diablo. Comment
  CAS-BOT-BC87332  Streptanthus hispidus John Thomas Howell 1941-4-6 16178 Contra Costa Ridge west of Deer Flat, Mount Diablo. Comment
  CAS-BOT-BC88251  Thysanocarpus curvipes John Thomas Howell 1933-5-14 11271 Contra Costa Hills east of Saint Mary's College. 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-BC89765  Lepidium latipes John Thomas Howell 1933-3-29 10907 Contra Costa Nortonville Hills. Comment
  CAS-BOT-BC91604  Platystemon californicus John Thomas Howell 1933-5-14 11278 Contra Costa Hills east of Saint Mary's College. Comment
  CAS-BOT-BC91605  Platystemon californicus John Thomas Howell 1933-5-14 11277 Contra Costa Hills east of Saint Mary's College. Comment
  CAS-BOT-BC92921  Ribes californicum var. californicum John Thomas Howell 1926-3-7 1669 Contra Costa Mount Diablo. Comment
  CAS-BOT-BC95309  Bowlesia incana John Thomas Howell 1933-3-29 10901 Contra Costa Nortonville hills Comment
  CAS-BOT-BC97700  Symphyotrichum chilense John Thomas Howell 1925-11-1 1534 Contra Costa Moraga Ridge, Oakland Hills Comment
  CAS-BOT-BC98614  Baccharis pilularis John Thomas Howell; Gordon H. True 1972-6-29 48926 Contra Costa Near Byron Hot Springs (site) Comment
  JEPS21710  Plantago major John Thomas Howell 1955-8-24 30898 Contra Costa near Diablo Country Club Comment
  JEPS21718  Cordylanthus pilosus subsp. pilosus John Thomas Howell 1955-8-24 30902 Contra Costa near Diablo Country Club; Mt. Diablo, S base of Comment
  JEPS35429  Helenium puberulum John Thomas Howell 1926-1-16 1626 Contra Costa San Leandro Canyon Oakland Hills Comment
  JEPS37916  Plantago elongata J. T. Howell 1933-3-29 10897 Contra Costa Nortonville Comment
  JEPS3931  Lactuca virosa John Thomas Howell 1943-8-22 19310 Contra Costa near head of San Leandro Creek Canyon 243 Comment
  JEPS54721  Cordylanthus nidularius J. T. Howell 1942-7-19 17044 Contra Costa NE of Deer Flat; Mt. Diablo; NE of Deer Flat, Mt. Diablo, Contra Costa Co. 609 Comment
  JEPS74307  Frankenia salina John Thomas Howell and Gordon H. True 1972-6-29 48919 Contra Costa Byron Hot Springs Road se Byron Comment
  JEPS88687  Hemizonia congesta subsp. luzulifolia John Thomas Howell 1955-8-24 30900 Contra Costa field border near Diablo Country Club; s base of Mt. Diablo Comment
  JEPS88689  Centromadia fitchii John Thomas Howell 30904 Contra Costa near Turtle Rock; Mt. Diablo 259 Comment
  LA203706  Hemizonia congesta subsp. luzulifolia John Thomas Howell; 1930-9-28 5488 Contra Costa 2 mi. from Concord on road to Walnut Creek Comment
  LA205246  Trifolium gracilentum John Thomas Howell; 1933-5-14 11264 Contra Costa E of St. Mary's College Comment
  LA206696  Navarretia mellita John Thomas Howell; 1938-6-30 13938 Contra Costa head of Siesta Valley Comment
  LA207022  Eriogonum truncatum John Thomas Howell; 1934-4-8 11816 Contra Costa 10 mi. from Clayton on Marsh Creek Road Comment
  NY68295  Cordylanthus nidularius J. T. Howell 1942-7-19 17044 Contra Costa Near of Deer Flat, Mt. Diablo. Comment
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Jul 18 2011
  NY68296  Cordylanthus nidularius J. T. Howell 1942-7-19 17044 Contra Costa Near of Deer Flat, Mt. Diablo. Comment
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Jul 18 2011
  NY68297  Cordylanthus nidularius J. T. Howell 1942-7-19 17044 Contra Costa Near of Deer Flat, Mt. Diablo. Comment
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Jul 18 2011
  POM181148  Clarkia affinis J. T. Howell 1931-5-12 6483 Contra Costa Mt. Diablo. Comment
  POM181150  Ribes californicum J. T. Howell 1931-2-21 5730 Contra Costa Mt. Diablo. Comment
  POM181154  Clarkia unguiculata J. T. Howell 1931-5-12 6481 Contra Costa Mt. Diablo. Comment
  POM193975  Arctostaphylos manzanita subsp. manzanita J. T. Howell 1926-3-7 1665 Contra Costa Mt. Diablo on old wagon road. Comment
  POM203039  Atriplex joaquinana J. T. Howell 1934-4-8 11823 Contra Costa South of Antioch, Contra Costa County Comment
  POM203448  Forestiera pubescens J. T. Howell 1933-3-29 10905 Contra Costa Canyon below Nortonville Comment
  POM203709  Helianthella castanea J. T. Howell 1931-5-12 6475 Contra Costa Nortonville Comment
  POM248733  Cirsium quercetorum J. T. Howell 1938-6-30 13940 Contra Costa Berkeley Hills on NE slope near head of Wildcat Canyon. Comment
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Nov 27 2009
  POM304529  Hesperolinon breweri J. T. Howell 1942-7-19 s.n. Contra Costa Northeast of Deer Flat, Mount Diablo Comment
  RSA118089  Eragrostis curvula J. T. Howell 1954-9-5 30026 Contra Costa Along road, Marsh Creek Springs Park Comment
  RSA15451  Mimulus aurantiacus var. aurantiacus J. T. Howell 1936-4-19 s.n. Contra Costa Nortonville Comment
  RSA244714  Frankenia salina J. T. Howell, G. H. True 1972-6-29 48919 Contra Costa On Byron Hot Springs Road SE of Byron. Comment
  RSA26397  Streptanthus hispidus J. T. Howell 1941-4-6 s.n. Contra Costa Ridge east of Deer Park, Mt. Diablo Comment
  RSA65310  Eriogonum truncatum J. T. Howell 1934-4-8 11816 Contra Costa 10 miles from Clayton on Marsh Creek Road Comment
  RSA66775  Lepidium latipes J. T. Howell 1933-3-29 10907 Contra Costa Nortonville Comment
  RSA72655  Helianthella castanea J. T. Howell 1940-4-21 15398 Contra Costa Pine Canyon, Mount Diablo Comment
  RSA8517  Calochortus umbellatus J. T. Howell 1933-5-14 11261 Contra Costa Hills east of St. Marys college Comment
  RSA8535  Helianthella castanea J. T. Howell 1933-5-14 11282 Contra Costa Hills east of St. Mary's college Comment
  SBBG27401  Galium murale J. T. Howell 1942-4-26 16953 Contra Costa Redwood Cyn, Oakland Hills Comment
  SBBG28847  Plagiobothrys bracteatus J. T. Howell 1933-5-14 11232 Contra Costa St Mary's College Comment
  SBBG29918  Hesperolinon breweri J. T. Howell 1942-7-19 Contra Costa NE of Deer Flat, Mt Diablo Comment
  SBBG29926  Nemophila heterophylla J. T. Howell 1933-5-14 12218 Contra Costa E of St. Mary's College Comment
  SBBG29985  Trifolium ciliolatum J. T. Howell 1933-5-14 11245 Contra Costa hills E of St Mary's College Comment
  SBBG29986  Trifolium bifidum var. decipiens J. T. Howell 1933-5-14 11264 Contra Costa hills E of St Mary's College Comment
  SBBG39713  Amsinckia intermedia J. T. Howell 1933-5-14 11225 Contra Costa St Mary's College Comment
  SD71393  Amsinckia lycopsoides John Thomas Howell 1933-5-14 11225 Contra Costa St. Mary's College Comment
  SD71397  Amsinckia menziesii John Thomas Howell 1933-5-14 11224 A Contra Costa St. Mary's College Comment
  SEINET3163766  Navarretia mellita J. T. Howell 1938-6-30 13938 Contra Costa head of Siesta Valley Comment
  UC1026379  Downingia insignis John Thomas Howell 1953-4-26 28935 Contra Costa between Byron and Byron Hot Springs Comment
  UC1026409  Carex globosa John Thomas Howell 1953-3-15 28923 Contra Costa Rock City Mt. Diablo Comment
  UC1042561  Quercus agrifolia John Thomas Howell 1950-7-5 26638 Contra Costa Nortonville Comment
  UC1177504  Polypodium calirhiza John Thomas Howell 1940-2-11 Contra Costa near Rock City; Mt. Diablo Comment
  UC1598596  Holocarpha heermannii John Thomas Howell 1955-8-24 30901 Contra Costa near Diablo Country Club (s base of Mt. Diablo); Mt. Diablo Comment
  UC421666  Epilobium campestre John Thomas Howell 1929-7-20 4331 Contra Costa Pittsburg Comment
  UC421693  Centromadia fitchii John Thomas Howell 1929-9-21 4388 Contra Costa 1 mi se Clayton Comment
  UC473441  Centromadia pungens subsp. pungens John Thomas Howell 1930-9-28 5489 Contra Costa 2 mi from Concord (on road to Walnut Creek) Comment
  UC473456  Holocarpha heermannii John Thomas Howell 1930-9-28 5499 Contra Costa 6.3 mi from Byron (on the Marsh Creek Rd.) Comment
  UC473563  Hemizonia congesta subsp. luzulifolia John Thomas Howell 1930-9-28 5488 Contra Costa 2 mi from Concord (on road to Walnut Creek) Comment
  UC485559  Ancistrocarphus filagineus Thomas Howell 1883-5-1 Contra Costa Antioch Comment
  UC517456  Carduus pycnocephalus subsp. pycnocephalus J. Thomas Howell 1933-5-14 11246 Contra Costa hills e of St. Mary's College Comment
  UC517457  Madia gracilis John Thomas Howell 1933-5-14 11266 Contra Costa hills e St. Mary's College Comment
  UC517459  Plagiobothrys bracteatus John Thomas Howell 1933-5-14 11232 Contra Costa St. Mary's College Comment
  UC517466  Agoseris heterophylla var. heterophylla J. Thomas Howell 1933-5-14 11260 Contra Costa hills east of St. Mary's College Comment
  UC517484  Nemophila heterophylla John Thomas Howell 1933-5-14 11218 Contra Costa hills e St. Mary's College; hills e of St. Mary's College Comment
  UC517488  Trifolium gracilentum John Thomas Howell 1933-5-14 11249 Contra Costa e St. Mary's College (hills) Comment
  UC517489  Trifolium ciliolatum John Thomas Howell 1933-5-14 11245 Contra Costa e St. Mary's College (hills) Comment
  UC517550  Nemophila heterophylla John Thomas Howell 1926-3-7 1659 Contra Costa Mt. Diablo near toll gate Mt. Diablo Comment
  UC517947  Dodecatheon hendersonii John Thomas Howell 1931-3-10 5756 Contra Costa on Livermore Road 7 mi from Clayton; e side Mt. Diablo, 7 mi from Clayton Comment
  UC517966  Claytonia perfoliata subsp. perfoliata John Thomas Howell 1931-3-10 5755 Contra Costa 7 mi from Clayton (on Livermore road, e side of Mt. Diablo); Mt. Diablo Comment
  UC517968  Holocarpha obconica John Thomas Howell 1930-9-28 5501 Contra Costa dry hills along the Marsh Creek Road 5.4 mi from Byron Comment
  UC517970  Athysanus pusillus John Thomas Howell 1931-3-10 5754 Contra Costa 7 mi from Clayton (on Livermore Road, e side of Mount Diablo); Mount Diablo Comment
  UC517996  Cardamine californica John Thomas Howell 1931-3-10 5757 Contra Costa on Livermore Road 7 mi from Clayton (e side Mt. Diablo); e side Mt. Diablo Comment
  UC526210  Eriogonum truncatum John Thomas Howell 1934-4-8 11816 Contra Costa 10 mi on Marsh Creek Road Clayton Comment
  UC666653  Sanicula saxatilis John Thomas Howell 1942-5-24 16969 Contra Costa Mount Diablo, Eagle Peak Mount Diablo; , Eagle Peak Comment
  UC691741  Cordylanthus nidularius J. T. Howell 1942-7-19 17044 Contra Costa NE (?) of Deer Flat, Mt. Diablo, Contra Costa Co. Comment
  UC691880  Sanicula saxatilis J. T. Howell 1942-5-24 16969 Contra Costa Mount Diablo, Eagle Point Mount Diablo; , Eagle Point Comment
  UC692353  Parvisedum pentandrum J. T. Howell 16970 Contra Costa ne of Deer Flat (Mount Diablo); Mount Diablo 609 Comment
  UC703025  Navarretia mellita John Thomas Howell 1942-7-19 17045 Contra Costa ne of Deer Flat; Mt. Diablo Comment
  UC703118  Galium murale John Thomas Howell 1942-4-26 16953 Contra Costa Redwood Canyon Oakland Hills Comment
  UC710613  Lactuca virosa John Thomas Howell 1943-8-22 19310 Contra Costa San Leandro Creek Canyon 243 Comment
  UC820506  Phalaris minor John Thomas Howell 1933-5-14 11234 Contra Costa St. Mary's College Comment
  UC856837  Navarretia mellita John Thomas Howell 1938-6-30 13938 Contra Costa Head of Siesta Valley Comment
  UC961415  Malacothamnus fremontii John Thomas Howell and T. H. Kearney 1950-7-5 26635 Contra Costa Nortonville Comment
  UCD113415  Rosa californica John Thomas Howell; Gordon H. True 1972-6-29 48930 Contra Costa Byron Hot Springs Road, SE of Byron. Comment
  UCD132123  Eriophyllum jepsonii John Thomas Howell 1950-7-5 26636 Contra Costa above Nortonville. Comment
  UCD136704  Eryngium spinosepalum John Thomas Howell; Gordon H. True 1972-6-29 48927 Contra Costa Byron Hot Springs Road, SE of Byron. Comment
  UCD45129  Quercus agrifolia John Thomas Howell 1950-7-5 26638 Contra Costa Small tree, Nortonville, Contra Costa Co. Comment
  UCD64182  Distichlis spicata John Thomas Howell; Gordon H. True 1972-6-29 48925 Contra Costa On Byron Hot Springs Road southeast of Byron. Comment
  UCD92599  Setaria parviflora John Thomas Howell; Gordon H. True 1972-6-29 48933 Contra Costa Byron Hot Springs. Road southeast of Byron. Comment
  UCD99590  Frankenia salina John Thomas Howell; Gordon H. True 1972-6-29 48919 Contra Costa on Byron Hot Springs Road southeast of Byron. Comment
  UCR139461  Eriogonum truncatum J. T. Howell 1934-4-8 11816 Contra Costa San Francisco Bay Region, [Black Hills] 10 mi from Clayton [SE] on Marsh Creek Road 366 Comment
  UCR168521  Hesperolinon micranthum J. T. Howell 1931-5-12 6472 Contra Costa Central Western; San Francisco Bay area, Nortonville 488 Comment
  UCR66430  Lactuca virosa J. T. Howell 1943-8-22 19310 Contra Costa San Francisco Bay Region/Coast Range, near head of San Leandro Creek Canyon 244 Comment
Read comments
Jul 7 2009
  CAS-BOT-BC10011  Delphinium hesperium subsp. pallescens John Thomas Howell 1934-4-8 11824 Contra Costa South of Antioch Comment
  CAS-BOT-BC10013  Delphinium hesperium subsp. pallescens John Thomas Howell 1931-5-12 6482 Contra Costa North Side of Mt. Diablo Comment
  CAS-BOT-BC10015  Delphinium hesperium subsp. pallescens John Thomas Howell 1931-5-12 6482 Contra Costa North side of Mt. Diablo Comment
  CAS-BOT-BC111377  Schoenoplectus acutus var. occidentalis John Thomas Howell; Gordon H. True 1972-6-29 48937 Contra Costa Wet soil or shallow water along ditches on Bryon Hot Springs Road SE of Byron. Comment
  CAS-BOT-BC113834  Cyperus niger John Thomas Howell 1950-7-5 26633 Contra Costa Spring along North Road, Mt. Diablo. Comment
  CAS-BOT-BC116458  Delphinium patens subsp. patens J. T. Howell 1931-3-10 5758 Contra Costa 7 miles east of Clayton, Mt. Diablo region Comment
  CAS-BOT-BC116461  Delphinium patens subsp. patens J. T. Howell 1931-3-10 5758 Contra Costa 7 miles east of Clayton, Mt. Diablo region Comment
  CAS-BOT-BC123704  Grindelia camporum var. parviflora John Thomas Howell 1930-9-28 5496 Contra Costa Liberty School on Marsh Creek Road Comment
  CAS-BOT-BC137271  Piperia elegans John Thomas Howell 1925-9-12 1436 Contra Costa Field redacted by CAS, contact the data manager for more information Comment
  CAS-BOT-BC137272  Piperia elegans John Thomas Howell 1942-8-23 17862 Contra Costa Field redacted by CAS, contact the data manager for more information Comment
  CAS-BOT-BC146024  Avena barbata John Thomas Howell 1983-5-12 54745 Contra Costa Mount Diablo. Juniper Camp. 914 Comment
  CAS-BOT-BC148631  Ptelea crenulata John Thomas Howell 1934-4-8 11811 Contra Costa 7 miles from Clayton on road to Livermore Comment
  CAS-BOT-BC148632  Ptelea crenulata John Thomas Howell 1929-9-21 4390 Contra Costa Marsh Creek Road 7 miles se. of Clayton Comment
  CAS-BOT-BC151950  Diplacus douglasii John Thomas Howell 1941-4-6 16177 Contra Costa Near Deer Flat, Mt. Diablo Comment
  CAS-BOT-BC15962  Boechera breweri subsp. breweri John Thomas Howell 1926-3-7 1671 Contra Costa Mount Diablo. Comment
  CAS-BOT-BC162565  Clarkia affinis John Thomas Howell 1931-5-12 6483 Contra Costa North side of Mt. Diablo Comment
  CAS-BOT-BC165453  Clarkia unguiculata John Thomas Howell 1931-5-12 6481 Contra Costa North side of Mt. Diablo Comment
  CAS-BOT-BC167433  Hesperolinon breweri John Thomas Howell 1942-7-19 17047 Contra Costa Serpentine ne. of Deer Flat, Mt. Diablo Comment
  CAS-BOT-BC168540  Atriplex coronata John Thomas Howell 1930-9-28 5503 Contra Costa 5.4 miles from Byron on Marsh Creek Road Comment
  CAS-BOT-BC170925  Alnus rhombifolia John Thomas Howell 1925-9-19 1474 Contra Costa East side of Moraga Ridge, Oakland Hills Comment
  CAS-BOT-BC172935  Toxicodendron diversilobum John Thomas Howell 1925-11-1 1541 Contra Costa Ne. side of Moraga Ridge, Oakland Hills Comment
  CAS-BOT-BC184717  Vulpia myuros subsp. megalura John Thomas Howell 1933-5-14 11243 Contra Costa St. Mary's College Comment
  CAS-BOT-BC187856  Lupinus chamissonis John Thomas Howell 1932-9-17 10757 Contra Costa Clay Flats, San Pablo Avenue, Richmond Comment
  CAS-BOT-BC187857  Lupinus chamissonis John Thomas Howell 1926-12-27 2272 Contra Costa 1.5 miles S of Oakley Comment
  CAS-BOT-BC200635  Garrya elliptica John Thomas Howell 1930-6-15 5304 Contra Costa NE. slope of Grizzley [Grizzly] Peak, Berkeley Hills Comment
  CAS-BOT-BC202275  Pickeringia montana var. montana John Thomas Howell 1925-10-11 1506 Contra Costa NW. end of Moraga Ridge, Oakland Hills Comment
  CAS-BOT-BC204094  Malacothamnus hallii John Thomas Howell; T. H. Kearney 1950-7-5 26634 Contra Costa On North Road, Mt. Diablo 259 Comment
  CAS-BOT-BC204095  Malacothamnus hallii John Thomas Howell; T. H. Kearney 1950-7-5 26634 Contra Costa On North Road, Mt. Diablo 259 Comment
  CAS-BOT-BC204096  Malacothamnus hallii John Thomas Howell; T. H. Kearney 1950-7-5 26634 Contra Costa On North Road, Mt. Diablo 259 Comment
  CAS-BOT-BC204097  Malacothamnus hallii John Thomas Howell; T. H. Kearney 1950-7-5 26634 Contra Costa On North Road, Mt. Diablo 259 Comment
  CAS-BOT-BC204316  Elymus trachycaulus subsp. trachycaulus John Thomas Howell 1942-7-19 17042 Contra Costa Near Deer Flat, Mt. Diablo Comment
  CAS-BOT-BC204547  Eragrostis curvula John Thomas Howell 1954-9-5 30026 Contra Costa Marsh Creek Springs Park Comment
  CAS-BOT-BC206017  Ribes menziesii John Thomas Howell 1980-4-10 53367 Contra Costa Morgan Territory east of Mt. Diablo Comment
  CAS-BOT-BC210452  Cornus sericea subsp. occidentalis John Thomas Howell 1925-11-7 1559 Contra Costa San Leandro Canyon near Canyon Station Comment
  CAS-BOT-BC220512  Monardella villosa John Thomas Howell 1929-7-7 4324 Contra Costa On northern slope near south end of Carquinez Bridge 45 Comment
  CAS-BOT-BC222218  Amsinckia John Thomas Howell 1934-4-8 11812 Contra Costa 7 miles from Clayton on road to Livermore Comment
  CAS-BOT-BC222219  Amsinckia John Thomas Howell 1934-4-8 11826 Contra Costa South of Antioch Comment
  CAS-BOT-BC222220  Amsinckia John Thomas Howell 1934-4-8 11827 Contra Costa South of Antioch Comment
  CAS-BOT-BC222221  Amsinckia John Thomas Howell 1934-4-8 11814 Contra Costa 7 miles from Clayton on road to Livermore Comment
  CAS-BOT-BC222222  Amsinckia John Thomas Howell 1934-4-8 11813 Contra Costa 7 miles from Clayton on road to Livermore Comment
  CAS-BOT-BC222230  Amsinckia John Thomas Howell 1933-3-29 10910 Contra Costa Nortonville hills Comment
  CAS-BOT-BC222231  Amsinckia John Thomas Howell 1933-3-29 10916 Contra Costa Pittsburg Comment
  CAS-BOT-BC222232  Amsinckia John Thomas Howell 1933-3-29 10908 A Contra Costa Nortonville hills Comment
  CAS-BOT-BC222233  Amsinckia John Thomas Howell 1933-3-29 10908 Contra Costa Nortonville hills Comment
  CAS-BOT-BC222234  Amsinckia John Thomas Howell 1933-3-29 10913 Contra Costa Nortonville hills Comment
  CAS-BOT-BC222235  Amsinckia John Thomas Howell 1933-3-29 10912 Contra Costa Nortonville hills Comment
  CAS-BOT-BC222236  Amsinckia John Thomas Howell 1933-3-29 10911 Contra Costa Nortonville hills Comment
  CAS-BOT-BC223859  Frankenia salina John Thomas Howell; Gordon H. True 1972-6-29 48919 Contra Costa On Byron Hot Springs Road southeast of Byron, Contra Costa Comment
  CAS-BOT-BC233584  Navarretia pubescens John Thomas Howell 1942-7-19 17041 Contra Costa Near Deer Flat, Mount Diablo Comment
  CAS-BOT-BC23559  Arctostaphylos crustacea John Thomas Howell 1952-3-2 28297 Contra Costa East end of Moraga Ridge summit Comment
  CAS-BOT-BC23560  Arctostaphylos crustacea John Thomas Howell 1930-6-15 5311 Contra Costa Rocky north-west slope of summit of Grizzley Peak, Berkeley Hills. Comment
  CAS-BOT-BC236611  Spartina foliosa John Thomas Howell 1932-10-8 10793 Contra Costa Mouth of Rodeo Creek Comment
  CAS-BOT-BC240418  Lonicera hispidula John Thomas Howell 1925-9-12 1433 Contra Costa Oakland Hills Comment
  CAS-BOT-BC250380  Eriogonum gracile John Thomas Howell 1929-9-21 4392 Contra Costa Marsh Creek Road 8 miles se. of Clayton Comment
  CAS-BOT-BC250382  Eriogonum gracile John Thomas Howell 1929-9-21 4392 Contra Costa Marsh Creek Road 8 miles se. of Clayton Comment
  CAS-BOT-BC250383  Eriogonum gracile John Thomas Howell 1932-10-2 10789 Contra Costa Marsh Creek Road southwest of Brentwood Comment
  CAS-BOT-BC250384  Eriogonum gracile John Thomas Howell 1929-7-20 4330 Contra Costa 2 miles s. of Oakley Comment
  CAS-BOT-BC250387  Eriogonum gracile John Thomas Howell 1929-7-20 4330 Contra Costa 2 miles s. of Oakley Comment
  CAS-BOT-BC254883  Poa bulbosa John Thomas Howell 1983-5-12 54747 Contra Costa Juniper Camp, Mount Diablo 914 Comment
  CAS-BOT-BC259139  Eriogonum latifolium John Thomas Howell 1930-7-4 5336 Contra Costa In the north Berkeley Hills Comment
  CAS-BOT-BC259646  Paspalum dilatatum John Thomas Howell; Gordon H. True 1972-6-29 48940 Contra Costa Along Byron Hot Springs Road where water has stood, SE of Byron Comment
  CAS-BOT-BC259647  Paspalum dilatatum John Thomas Howell 1954-9-5 30025 Contra Costa Marsh Creek Springs Park Comment
  CAS-BOT-BC262350  Eriogonum vimineum John Thomas Howell 1955-8-24 30903 Contra Costa Near summit of South Peak, Mt. Diablo 1158 Comment
  CAS-BOT-BC262352  Eriogonum vimineum John Thomas Howell 1955-8-24 30903 Contra Costa Near summit of South Peak, Mt. Diablo Comment
  CAS-BOT-BC268909  Eriogonum nudum var. auriculatum John Thomas Howell 1930-7-4 5337 Contra Costa In the north Berkeley Hills Comment
  CAS-BOT-BC268914  Eriogonum nudum var. auriculatum John Thomas Howell 1929-9-21 4393 Contra Costa On Marsh Creek Road 8 miles se. of Clayton Comment
  CAS-BOT-BC272218  Leymus triticoides John Thomas Howell; Gordon H. True 1972-6-29 48928 Contra Costa Byron Hot Springs Road southeast of Byron Comment
  CAS-BOT-BC273931  Leptochloa fusca subsp. fascicularis John Thomas Howell; Gordon H. True 1972-6-29 48944 Contra Costa Along Byron Hot Springs Road where water has stood, southeast of Byron Comment
  CAS-BOT-BC277974  Cirsium cymosum John Thomas Howell 1942-7-19 17039 Contra Costa Near Rock City, Mt. Diablo Comment
  CAS-BOT-BC277975  Cirsium cymosum John Thomas Howell 1942-7-19 17039 Contra Costa Near Rock City, Mt. Diablo Comment
  CAS-BOT-BC277976  Cirsium cymosum John Thomas Howell 1931-5-12 6478 Contra Costa North side of Mt. Diablo Comment
  CAS-BOT-BC277977  Cirsium cymosum John Thomas Howell 1931-5-12 6479 Contra Costa North side of Mt. Diablo Comment
  CAS-BOT-BC279180  Centromadia pungens subsp. pungens John Thomas Howell 1929-9-21 4395 Contra Costa Marsh Creek Road 3.5 miles sw. of Brentwood Comment
  CAS-BOT-BC281737  Carduus pycnocephalus John Thomas Howell 1933-5-14 11246 Contra Costa Hills E of St Mary's College Comment
  CAS-BOT-BC281738  Carduus pycnocephalus John Thomas Howell 1933-5-14 11246 Contra Costa Hills E of St Mary's College Comment
  CAS-BOT-BC281805  Carduus tenuiflorus John Thomas Howell 1933-5-21 11323 Contra Costa San Pablo Comment
  CAS-BOT-BC288539  Centromadia fitchii John Thomas Howell 1929-9-21 4388 Contra Costa 1 mile SE of Clayton Comment
  CAS-BOT-BC288541  Centromadia fitchii John Thomas Howell 1955-8-24 30904 Contra Costa Mt Diablo near Turtle Rock 259 Comment
  CAS-BOT-BC288883  Centromadia parryi subsp. congdonii John Thomas Howell 1932-10-16 10820 Contra Costa Near San Ramon Comment
  CAS-BOT-BC291811  Deinandra lobbii John Thomas Howell 1933-9-17 11663 Contra Costa Hills south of Rodeo Comment
  CAS-BOT-BC294020  Deinandra kelloggii John Thomas Howell 1930-9-28 5505 Contra Costa 3.2 miles from Byron on Marsh Creek Road Comment
  CAS-BOT-BC294021  Deinandra kelloggii John Thomas Howell 1929-7-20 4329 Contra Costa 2 miles s. of Oakley Comment
  CAS-BOT-BC299742  Cynara cardunculus John Thomas Howell 1953-3-15 28922 Contra Costa Danville Comment
  CAS-BOT-BC299743  Cynara cardunculus John Thomas Howell 1953-3-15 28922 Contra Costa Danville Comment
  CAS-BOT-BC299744  Cynara cardunculus John Thomas Howell 1953-3-15 28922 Contra Costa Danville Comment
  CAS-BOT-BC299745  Cynara cardunculus John Thomas Howell 1953-3-15 28922 Contra Costa Danville Comment
  CAS-BOT-BC300969  Eriophyllum lanatum var. achilleoides John Thomas Howell 1931-5-12 6485 A Contra Costa Marsh Creek Road ne. of Mt. Diablo Comment
  CAS-BOT-BC304579  Gutierrezia californica John Thomas Howell 1929-9-21 4394 Contra Costa Marsh Creek Road 10 1/2 miles se. of Clayton Comment
  CAS-BOT-BC305221  Grindelia hirsutula J. T. Howell 1930-9-28 5496 Contra Costa Liberty School on Marsh Creek Road Comment
  CAS-BOT-BC305224  Grindelia hirsutula John Thomas Howell 1930-9-28 5495 Contra Costa Liberty School on Marsh Creek Road Comment
  CAS-BOT-BC305229  Grindelia hirsutula John Thomas Howell 1929-7-7 4322 Contra Costa 2 miles s. of Rodeo Comment
  CAS-BOT-BC305230  Grindelia hirsutula John Thomas Howell 1930-9-28 5486 Contra Costa Tunnel Road near Oak Spring Comment
  CAS-BOT-BC305231  Grindelia hirsutula John Thomas Howell 1929-7-7 4322 Contra Costa 2 miles south of Rodeo Comment
  CAS-BOT-BC305240  Grindelia hirsutula John Thomas Howell 1929-9-21 4387 Contra Costa 4 miles west of Clayton Comment
  CAS-BOT-BC305241  Grindelia hirsutula John Thomas Howell 1929-9-21 4396 Contra Costa Marsh Creek Road 3.5 miles sw. of Brentwood Comment
  CAS-BOT-BC305242  Grindelia hirsutula John Thomas Howell 1929-9-21 4387 Contra Costa 4 miles west of Clayton Comment
  CAS-BOT-BC305245  Grindelia hirsutula John Thomas Howell 1954-9-5 30027 Contra Costa Marsh Creek Road 8 miles from Byron Comment
  CAS-BOT-BC305248  Grindelia hirsutula John Thomas Howell 1930-9-28 5486 Contra Costa Tunnel Road near Oak Spring Comment
  CAS-BOT-BC305250  Grindelia hirsutula John Thomas Howell 1932-10-8 10796 Contra Costa Tidal flat at mouth of Rodeo Creek Comment
  CAS-BOT-BC306337  Helenium John Thomas Howell 1926-1-16 1626 Contra Costa San Leandro Canyon, Oakland Hills Comment
  CAS-BOT-BC309407  Helenium puberulum John Thomas Howell; Gordon H. True 1972-6-29 48932 Contra Costa On Byron Hot Springs Road southeast of Byron Comment
  CAS-BOT-BC310191  Hesperevax sparsiflora var. sparsiflora John Thomas Howell 1930-4-22 4749 Contra Costa Bald Peak Comment
  CAS-BOT-BC311160  Heterotheca sessiliflora subsp. bolanderi John Thomas Howell 1930-7-31 5416 Contra Costa North Berkeley Hills Comment
  CAS-BOT-BC31330  Bolboschoenus maritimus John Thomas Howell 1978-9-5 53356 Contra Costa Pittsburg Marina. Comment
  CAS-BOT-BC31331  Bolboschoenus maritimus John Thomas Howell; Gordon H. True 1972-6-29 48943 Contra Costa Low places along Byron Hot Springs Road, SE of Byron. Comment
  CAS-BOT-BC31392  Bolboschoenus robustus John Thomas Howell 1932-10-8 10794 Contra Costa Tidal Flat at mouth of Rodeo Creek. Comment
  CAS-BOT-BC314865  Hemizonia congesta subsp. luzulifolia John Thomas Howell 1929-9-21 4386 Contra Costa 4 miles west of Clayton Comment
  CAS-BOT-BC314866  Hemizonia congesta subsp. luzulifolia John Thomas Howell 1925-12-6 1612 Contra Costa Ridge between Redwood Canyon and San Leandro Canyon, Oakland Hills Comment
  CAS-BOT-BC314867  Hemizonia congesta subsp. luzulifolia John Thomas Howell 1955-8-24 30900 Contra Costa Near Diablo Country Club Comment
  CAS-BOT-BC320201  Holocarpha heermannii John Thomas Howell 1955-8-24 30901 Contra Costa Near Diablo Country Club Comment
  CAS-BOT-BC320247  Holocarpha obconica John Thomas Howell 1930-9-28 5500 Contra Costa 6.3 miles from Byron on Marsh Creek Road Comment
  CAS-BOT-BC320248  Holocarpha obconica John Thomas Howell 1930-9-28 5501 Contra Costa On the Marsh Creek Road, 5.4 miles from Byron Comment
  CAS-BOT-BC320260  Holocarpha obconica John Thomas Howell 1930-9-28 5501 Contra Costa On the Marsh Creek Road, 5.4 miles from Byron Comment
  CAS-BOT-BC320329  Holocarpha virgata John Thomas Howell 1930-9-28 5502 Contra Costa 5.4 miles from Byron, on Marsh Creek Road Comment
  CAS-BOT-BC321748  Layia gaillardioides John Thomas Howell 1941-4-6 16176 Contra Costa Deer Flat, Mt. Diablo Comment
  CAS-BOT-BC321749  Layia gaillardioides John Thomas Howell 1941-4-6 16176 Contra Costa Deer Flat, Mt. Diablo Comment
  CAS-BOT-BC324618  Holocarpha virgata John Thomas Howell 1930-9-28 5502 Contra Costa On the Marsh Creek Road 5.4 miles from Byron Comment
  CAS-BOT-BC324619  Holocarpha virgata John Thomas Howell 1929-9-21 4389 Contra Costa 5 miles southeast of Clayton on Marsh Creek Road Comment
  CAS-BOT-BC325829  Holocarpha heermannii John Thomas Howell 1930-9-28 5487 Contra Costa 1 mile from Walnut Creek on Walnut Avenue to Concord Comment
  CAS-BOT-BC325830  Holocarpha heermannii John Thomas Howell 1930-9-28 5487 Contra Costa 1 mile from Walnut Creek on Walnut Avenue to Concord Comment
  CAS-BOT-BC325831  Holocarpha heermannii John Thomas Howell 1930-9-28 5499 Contra Costa 6.3 miles from Byron on teh Marsh Creek Road Comment
  CAS-BOT-BC325832  Holocarpha heermannii John Thomas Howell 1930-9-28 5499 Contra Costa 6.3 miles from Byron on teh Marsh Creek Road Comment
  CAS-BOT-BC325833  Holocarpha heermannii John Thomas Howell 1929-9-21 4389 Contra Costa 5 miles se. of Clayton on Marsh Creek Road Comment
  CAS-BOT-BC327382  Senecio aphanactis John Thomas Howell 1933-3-29 10900 Contra Costa Nortonville hills Comment
  CAS-BOT-BC327987  Pentachaeta alsinoides John Thomas Howell 1931-5-12 6476 Contra Costa Nortonville Comment
  CAS-BOT-BC334184  Acer negundo var. californicum John Thomas Howell 1925-11-7 1549 Contra Costa Between Pinehurst and Canyon Station, San Leandro Canyon Comment
  CAS-BOT-BC340425  Lactuca saligna John Thomas Howell 1932-10-16 10819 Contra Costa Near San Ramon Comment
  CAS-BOT-BC340540  Lactuca serriola John Thomas Howell; Gordon H. True 1972-7-29 48918 Contra Costa On Byron Hot Springs Road southeast of Byron Comment
  CAS-BOT-BC340541  Lactuca serriola John Thomas Howell; Gordon H. True 1972-7-29 s.n. Contra Costa On Byron Hot Springs Road southeast of Byron Comment
  CAS-BOT-BC340695  Lactuca virosa John Thomas Howell 1943-8-22 19310 Contra Costa Pinehurst Canyon, Oakland Hills Comment
  CAS-BOT-BC340696  Lactuca virosa John Thomas Howell 1943-8-22 19310 Contra Costa Near head of San Leandro Creek Canyon 243 Comment
  CAS-BOT-BC340697  Lactuca virosa John Thomas Howell 1942-6-28 17004 Contra Costa Oakland Hills near Redwood Peak Comment
  CAS-BOT-BC340698  Lactuca virosa John Thomas Howell 1942-7-19 17040 Contra Costa Along trail west of Deer Flat, Mt. Diablo Comment
  CAS-BOT-BC340699  Lactuca virosa John Thomas Howell 1943-8-22 19310 Contra Costa Near head of San Leandro Creek Canyon 243 Comment
  CAS-BOT-BC340700  Lactuca virosa John Thomas Howell 1943-8-22 19310 Contra Costa Near head of San Leandro Creek Canyon 243 Comment
  CAS-BOT-BC341474  Lagophylla ramosissima John Thomas Howell 1925-11-1 1550 Contra Costa Hillside near Pinehurst, San Leandro Canyon Comment
  CAS-BOT-BC341475  Lagophylla ramosissima John Thomas Howell 1930-9-28 5494 Contra Costa Marsh Creek Road, 7 miles east of Clayton Comment
  CAS-BOT-BC342983  Madia gracilis John Thomas Howell 1931-5-12 6484 Contra Costa North side of Mt. Diablo Comment
  CAS-BOT-BC344327  Madia exigua John Thomas Howell 1931-5-12 6473 Contra Costa Nortonville Comment
  CAS-BOT-BC348649  Micropus californicus var. subvestitus John Thomas Howell 1930-4-22 4746 Contra Costa Wildcat Canyon Comment
  CAS-BOT-BC356973  Pseudognaphalium luteoalbum John Thomas Howell; Gordon H. True 1972-6-29 48934 Contra Costa On Byron Hot Springs Road southeast of Byron Comment
  CAS-BOT-BC357444  Pseudognaphalium ramosissimum John Thomas Howell 1925-11-7 1558 Contra Costa San Leandro Canyon, Oakland Hills Comment
  CAS-BOT-BC357592  Pseudognaphalium stramineum John Thomas Howell 1925-11-7 1556 Contra Costa San Leandro Canyon, Oakland Hills Comment
  CAS-BOT-BC361878  Psilocarphus tenellus John Thomas Howell 1930-4-22 4748 Contra Costa Bald Peak Comment
  CAS-BOT-BC365985  Sonchus asper John Thomas Howell 1933-5-14 11248 Contra Costa Hills east of St. Mary's College Comment
  CAS-BOT-BC366306  Lasthenia minor J. T. Howell 1933-3-29 10895 Contra Costa Nortonville Comment
  CAS-BOT-BC376774  Tanacetum parthenium John Thomas Howell 1942-6-28 17006 Contra Costa Oakland Hills near Redwood Peak Comment
  CAS-BOT-BC393980  Stellaria nitens John Thomas Howell 1927-3-6 2284 Contra Costa summit of Shell Ridge 243 Comment
  CAS-BOT-BC400500  Asarum caudatum John Thomas Howell 1925-9-12 1439 Contra Costa San Leandro Canon [Canyon], Oakland Hills Comment
  CAS-BOT-BC40763  Erysimum capitatum John Thomas Howell 1926-3-7 1672 Contra Costa Mount Diablo. Near the summit on south side. Comment
  CAS-BOT-BC417826  Sedella pentandra John Thomas Howell 1941-4-6 16182 Contra Costa Near Deer Flat, Mt. Diablo Comment
  CAS-BOT-BC421738  Rumex conglomeratus John Thomas Howell; Gordon H. True 1972-6-29 48935 Contra Costa On Byron Hot Springs Road southeast of Byron Comment
  CAS-BOT-BC422911  Stylomecon heterophylla John Thomas Howell 1931-5-12 6480 Contra Costa North side of Mt. Diablo Comment
  CAS-BOT-BC439168  Claytonia exigua subsp. exigua John Thomas Howell 1926-3-7 1678 Contra Costa Mitchell Canon [Canyon], Mt. Diablo Comment
  CAS-BOT-BC439929  Claytonia perfoliata subsp. mexicana John Thomas Howell 1933-5-14 11251 Contra Costa Hills east of St. Mary's Comment
  CAS-BOT-BC46098  Agoseris hirsuta John Thomas Howell 1925-12-6 1611 Contra Costa Ridge between Redwood Canon and San Leandro Canon, Oakland Hills 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-BC475532  Allium serra John Thomas Howell 1933-5-14 11284 Contra Costa Hills east of St. Mary's College Comment
  CAS-BOT-BC476607  Allium unifolium John Thomas Howell 1931-5-12 6469 Contra Costa Oakland Hills Comment
  CAS-BOT-BC494047  Calochortus venustus John Thomas Howell 1931-5-12 6471 Contra Costa Nortonville Comment
  CAS-BOT-BC500091  Dichelostemma capitatum John Thomas Howell 1944-7-17 19831 Contra Costa Canyon of Snow Basin Creek Comment
  CAS-BOT-BC500251  Orobanche uniflora subsp. occidentalis John Thomas Howell 1940-4-21 15401 Contra Costa Pine Canyon, Mt. Diablo Comment
  CAS-BOT-BC502555  Dichelostemma congestum John Thomas Howell 1933-5-14 11258 Contra Costa Hills east of St. Mary's College Comment
  CAS-BOT-BC502955  Orobanche vallicola John Thomas Howell 1929-9-21 4391 Contra Costa Marsh Creek Road, 7 miles SE of Clayton Comment
  CAS-BOT-BC522175  Triteleia laxa John Thomas Howell 1931-5-12 6468 Contra Costa Oakland Hills Comment
  CAS-BOT-BC526326  Triteleia laxa John Thomas Howell 1931-5-12 6468 Contra Costa Oakland Hills Comment
  CAS-BOT-BC55300  Hirschfeldia incana John Thomas Howell; Gordon H. True 1972-6-29 48929 Contra Costa Byron Hot Springs Road southeast of Byron. Comment
  CAS-BOT-BC66352  Cheilanthes covillei John Thomas Howell 1955-3-6 30146 Contra Costa on south side of South Peak, Mt. Diablo Comment
  CAS-BOT-BC70278  Cheilanthes intertexta John Thomas Howell 1955-3-6 30145 Contra Costa between South & North peaks of Mt. Diablo Comment
  CAS-BOT-BC8186  Malvastrum howellii John Thomas Howell 1931-5-12 6470 Contra Costa Nortonville Comment
  CAS-BOT-BC88253  Thysanocarpus curvipes John Thomas Howell 1934-4-1 11821 Contra Costa Marsh Creek Road southwest of Brentwood. Comment
  CAS-BOT-BC88254  Thysanocarpus curvipes John Thomas Howell 1934-4-8 11821 Contra Costa Marsh Creek Road southwest of Brentwood. Comment
  CAS-BOT-BC88255  Thysanocarpus curvipes John Thomas Howell 1934-4-8 11822 Contra Costa Marsh Creek Road southwest of Brentwood. Comment
  CAS-BOT-BC88703  Lepidium acutidens John Thomas Howell 1933-3-29 10894 Contra Costa Nortonville. Comment
  CAS-BOT-BC90295  Artemisia douglasiana John Thomas Howell 1925-9-19 1467 Contra Costa East side of Moraga Ridge near south end, Oakland Hills Comment
  CAS-BOT-BC90299  Artemisia douglasiana John Thomas Howell; Gordon H. True 1972-6-29 48945 Contra Costa Low places along Byron Hot Springs Road where water has stood, southeast of Byron Comment
  CAS-BOT-BC92920  Ribes californicum var. californicum John Thomas Howell 1931-2-21 5730 Contra Costa North side of Mount Diablo. Comment
  CAS-BOT-BC9612  Delphinium californicum John Thomas Howell 1950-7-5 26631 Contra Costa Juniper Camp, Mt. Diablo Comment
  CAS-BOT-BC98040  Symphyotrichum lentum John Thomas Howell 1978-9-5 53357 Contra Costa Pittsburg Marina Comment
  CAS-BOT-BC98764  Baccharis douglasii John Thomas Howell 1926-1-17 1627 Contra Costa Between Cashion and las Trampas Ridge Comment
  CDA7515  Lactuca virosa J. T. Howell 1943-8-22 19310 Contra Costa Near head of San Leandro Creek Canyon. Comment
  JEPS21278  Baccharis glutinosa J. Thomas Howell 1926-1-17 1627 Contra Costa between Cashion and Las Trampas Ridge Cashion Comment
  JEPS62457  Pogogyne serpylloides John Thomas Howell 1930-4-22 4747 Contra Costa Bald Peak, Berkeley Hills. Comment
  LA203994  Holocarpha virgata John Thomas Howell; 1930-9-28 5501 Contra Costa on the Marsh Creek Road, 5.4 mi. from Byron Comment
  LA204280  Cardamine californica John Thomas Howell; 1931-3-10 5757 Contra Costa Mt. Diablo, 7 miles from Clayton on Livermore road Comment
  LA204675  Atriplex coronata John Thomas Howell; 1930-9-28 5503 Contra Costa 5.4 miles from Byron on Marsh Creek Road Comment
  POM179710  Eriogonum nudum var. auriculatum J. T. Howell 1930-7-4 5337 Contra Costa Rocky hilltop in the north Berkeley Hills. Comment
  POM179764  Holocarpha virgata subsp. virgata J. T. Howell 1930-9-28 5500 Contra Costa 6.3 miles from Byron on the Marsh Creek Road. Comment
  POM179765  Holocarpha heermannii J. T. Howell 1930-9-28 5499 Contra Costa 6.3 miles from Byron on the Marsh Creek Road. Comment
  POM179767  Holocarpha virgata subsp. virgata J. T. Howell 1930-9-28 5502 Contra Costa 5.4 miles from Byron on Marsh Creek Road. Comment
  POM180746  Heterotheca sessiliflora subsp. echioides J. T. Howell 1930-7-31 5416 Contra Costa North Berkeley Hills. Comment
  POM180792  Quercus wislizeni J. T. Howell 1930-6-15 5310 Contra Costa Summit of Grizzley Peak, Berkeley Hills 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
  POM181083  Atriplex coronata J. T. Howell 1930-9-28 5503 Contra Costa 5.4 miles from Byron on Marsh Creek Road. Comment
  POM183312  Atriplex subspicata J. T. Howell 1931-10-31 8163 Contra Costa Bay Point. Comment
  POM193965  Grindelia hirsutula var. davyi J. T. Howell 1929-7-7 4332 Contra Costa 2 miles S of Rodeo. Comment
  POM193972  Pogogyne serpylloides J. T. Howell 1930-4-22 4747 Contra Costa Bald Peak Comment
  POM194201  Boisduvalia glabella J. T. Howell 1929-7-20 4331 Contra Costa Pittsburg Comment
  POM194216  Croton californicus J. T. Howell 1926-12-27 2273 Contra Costa 1.5 miles s. of Oakley. Comment
  POM196479  Eriogonum J. T. Howell 1929-9-21 7392 Contra Costa Marsh Creek Road 8 miles southeast of Clayton Comment
  POM203034  Collinsia sparsiflora var. collina J. T. Howell 1934-4-8 11810 Contra Costa 7 miles from Clayton on road to Livermore. Comment
  POM203036  Thysanocarpus curvipes var. curvipes J. T. Howell 1934-4-8 11822 Contra Costa Marsh Creek Road, SW of Brentwood. Comment
  POM203037  Ptelea baldwinii subsp. crenulata J. T. Howell 1934-4-8 11811 Contra Costa 7 miles from Clayton on road to Livermore. Comment
  POM203038  Delphinium hesperium subsp. pallescens J. T. Howell 1934-4-8 11824 Contra Costa South of Antioch Comment
  POM203314  Dodecatheon hendersonii subsp. cruciatum J. T. Howell 1931-3-10 5756 Contra Costa East side of Mt. Diablo 7 miles from Clayton on Livermore road. Comment
  POM203316  Hesperolinon micranthum J. T. Howell 1931-5-12 6472 Contra Costa Nortonville Comment
  POM203445  Eriophyllum lanatum var. achilleoides J. T. Howell 1931-5-12 6485 A Contra Costa Marsh Creek Road NE of Mt. Diablo Comment
  POM203632  Trifolium ciliolatum J. T. Howell 11245 Contra Costa Hills east of St. Marys College. Comment
  POM203635  Trifolium bifidum var. decipiens J. T. Howell 1933-5-14 11264 Contra Costa Hills east of St. Marys college Comment
  POM203638  Platystemon californicus var. californicus J. T. Howell 1933-5-14 11277 Contra Costa Hills east of St. Mary's college Comment
  POM203648  Cardamine californica var. integrifolia J. T. Howell 1933-5-14 11255 Contra Costa Hills east of St. Mary s college Comment
  POM203649  Aquilegia formosa var. truncata J. T. Howell 1933-5-14 11253 Contra Costa Hills east of St. Mary's college Comment
  POM203654  Lithophragma affine subsp. affine John T. Howell 1933-5-14 11280 Contra Costa Hills east of St. Mary s college Comment
  POM203659  Agoseris heterophylla John T. Howell 1933-5-14 11260 Contra Costa Hills east of St. Mary's college Comment
  POM203716  Triteleia laxa J. T. Howell 1931-5-12 6468 Contra Costa Oakland Hills Comment
  POM203838  Juncus xiphioides J. T. Howell 1934-5-14 11239 Contra Costa St. Mary s College. Comment
  POM203934  Delphinium patens J. T. Howell 1931-3-10 5758 Contra Costa East side of Mt. Diablo 7 miles from Clayton on Livermore road. Comment
  POM204444  Lepidium dictyotum var. acutidens J. T. Howell 1933-3-29 10894 Contra Costa Nortonville Comment
  POM204460  Phacelia ciliata J. T. Howell 1933-3-29 10915 Contra Costa Near Pittsburg. Comment
  POM204479  Nemophila heterophylla J. T. Howell 1933-5-14 11218 Contra Costa Hills east of St. Mary s college Comment
  POM204480  Mimulus guttatus J. T. Howell 1933-5-14 11242 Contra Costa St. Mary's College Comment
  POM204481  Solanum umbelliferum J. T. Howell 1933-5-14 11291 Contra Costa Hills east of St. Mary's college Comment
  POM215114  Stachys ajugoides J. T. Howell 1932-10-16 10818 Contra Costa Near San Ramon. Comment
  POM225347  Delphinium hesperium J. T. Howell 1931-5-12 6482 Contra Costa N side of Mt Diablo Comment
  POM225551  Cardamine californica var. integrifolia J. T. Howell 1931-3-10 5757 Contra Costa East side of Mt. Diablo 7 miles from Clayton on Livermore road. Comment
  POM225552  Athysanus pusillus J. T. Howell 1931-3-10 5754 Contra Costa East side of Mt. Diablo 7 miles from Clayton on Livermore road. 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
  POM225873  Wyethia helenioides J. T. Howell 1933-5-14 11287 Contra Costa Hills east of St. Mary's college Comment
  POM226096  Marah fabacea J. T. Howell 1933-3-29 10902 Contra Costa Nortonville hills. Comment
  POM226098  Plagiobothrys bracteatus J. T. Howell 1933-5-14 11232 Contra Costa St. Mary s College Comment
  POM226232  Carduus tenuiflorus J. T. Howell 1933-5-21 11323 Contra Costa San Pablo Comment
  POM261437  Mimulus guttatus J. T. Howell 1940-4-21 15402 Contra Costa Pine Canyon, Mount Diablo Comment
  POM303721  Lactuca virosa J. T. Howell 1943-8-22 19310 Contra Costa Near head of San Leandro Creek Canyon. 244 Comment
  RSA0004205  Malvastrum howellii J. T. Howell 1931-5-12 6470 Contra Costa Nortonville Comment
  RSA0006003  Cordylanthus nidularius J. T. Howell 1942-7-19 17044 Contra Costa Northeast of Deer Flat, Mount Diablo Comment
  RSA0006004  Cordylanthus nidularius J. T. Howell 1942-7-19 17044 Contra Costa Northeast of Deer Flat, Mount Diablo Comment
  RSA0021635  Ribes malvaceum J. T. Howell 1926-3-7 1667 Contra Costa Mt. Diablo. Comment
  RSA0022137  Pogogyne serpylloides J. T. Howell 1930-4-22 4747 Contra Costa Bald Peak Comment
  RSA0039373  Thysanocarpus curvipes var. curvipes John Thomas Howell 1934-4-8 11821 Contra Costa Marsh Creek Road SW of Brentwood. Comment
  RSA0070867  Cirsium quercetorum J. T. Howell 1938-6-30 13940 Contra Costa Berkeley Hills on NE slope near head of Wildcat Canyon. Comment
  RSA118092  Paspalum dilatatum J. T. Howell 1954-9-5 30025 Contra Costa Along road, Marsh Creek Springs Park Comment
  RSA136731  Cordylanthus pilosus subsp. pilosus J. T. Howell 1955-8-24 30902 Contra Costa Near Diablo County Club, south base of Mt. Diablo. Comment
  RSA136732  Eriogonum J. T. Howell 1955-8-24 30903 Contra Costa Near summit of south peak, Mt. Diablo Comment
  RSA136734  Eryngium aristulatum var. aristulatum J. T. Howell 1955-8-24 30899 Contra Costa Near Diablo Country Club Comment
  RSA136762  Holocarpha heermannii J. T. Howell 1955-8-24 30901 Contra Costa Near Diablo County Club, south base of Mt. Diablo. Comment
  RSA137090  Hemizonia fitchii J. T. Howell 1955-8-24 30904 Contra Costa Mt. Diablo near Turtle Rock. 259 Comment
  RSA137096  Hemizonia luzulifolia J. T. Howell 1955-8-24 30900 Contra Costa Near Diablo County Club, south base of Mt. Diablo. Comment
  RSA201409  Amsinckia intermedia J. T. Howell 1933-5-14 11225 Contra Costa St. Mary s College Comment
  RSA203627  Lupinus bicolor subsp. tridentatus J. T. Howell 1933-5-14 11250 Contra Costa Hills east of St. Marys college Comment
  RSA22143  Navarretia mellita J. T. Howell 1938-6-30 13938 Contra Costa Head of Siesta Valley Comment
  RSA244713  Atriplex fruticulosa J. T. Howell, G. True 1972-6-29 48917 Contra Costa On Byron Hot Springs Road SE of Byron. Comment
  RSA26408  Allium falcifolium J. T. Howell 1941-4-6 16179 Contra Costa Ridge east of Deer Park, Mt. Diablo Comment
  RSA40156  Lactuca virosa J. T. Howell 1943-8-22 19310 Contra Costa Near head of San Leandro Creek Canyon. 244 Comment
  RSA461371  Dodecatheon hendersonii J. T. Howell 1931-3-10 5756 Contra Costa East side of Mt. Diablo 7 miles from Clayton on Livermore road. Comment
  RSA61570  Trifolium gracilentum J. T. Howell 1933-5-14 11249 Contra Costa Hills east of St. Marys college Comment
  RSA66572  Lepidium dictyotum var. acutidens J. T. Howell 1933-3-29 10894 Contra Costa Nortonville Comment
  RSA77636  Marah fabacea J. T. Howell 1933-3-29 10903 Contra Costa Nortonville hills. Comment
  RSA83391  Monardella douglasii J. T. Howell 1942-7-19 17049 Contra Costa Northeast of Deer Flat, Mount Diablo Comment
  RSA8522  Lasthenia minor J. T. Howell 1933-3-29 10895 Contra Costa Nortonville Comment
  RSA8523  Agoseris heterophylla J. T. Howell 1933-5-14 11260 Contra Costa Hills east of St. Mary's college Comment
  RSA8534  Carduus pycnocephalus J. T. Howell 1933-5-14 11246 Contra Costa Hills east of St. Mary's college Comment
  RSA90931  Trifolium microdon J. T. Howell 1933-5-14 11244 Contra Costa St. Mary's College. Comment
  RSA90947  Trifolium fucatum var. fucatum J. T. Howell 1933-5-14 11237 Contra Costa St. Mary's College. Comment
  RSA91445  Hesperolinon breweri J. T. Howell 1942-7-19 s.n. Contra Costa Northeast of Deer Flat, Mount Diablo Comment
  RSA91555  Trifolium willdenovii J. T. Howell 1933-5-14 11231 Contra Costa St. Mary's College. Comment
  RSA94065  Holocarpha virgata subsp. virgata J. T. Howell 1930-9-28 5501 Contra Costa 5.4 miles from Byron on Marsh Creek Road. Comment
  RSA97189  Downingia insignis J. T. Howell 1953-4-26 28935 Contra Costa Between Byron and Byron Hot Springs. Comment
  RSA97649  Eriophyllum lanatum var. achilleoides J. T. Howell 1950-7-5 26636 Contra Costa Brushy slope above Nortonville Comment
  SEINET10593167  Phalaris minor John Thomas Howell 1933-5-14 Howell 11234 Contra Costa St. Mary's College Comment
  SEINET10853324 Image available Malacothamnus hallii John Thomas Howell 1931-5-12 Howell 6470 Contra Costa Nortonville. Comment
  SEINET10925203 Image available Grindelia camporum var. parviflora John Thomas Howell 1930-9-28 Howell 5496 Contra Costa Liberty School on Marsh Creek Road, Contra Costa Co. Comment
  SEINET12044746  Triteleia laxa J. T. Howell 1931-1 6468 Contra Costa Oakland Hills Comment
  SEINET12044784  Allium serratum J. T. Howell 1933-1 11284 Contra Costa E of St. Mary's College Comment
  SEINET12086747  Delphinium hesperium J. T. Howell 1931-1 6482 Contra Costa North Side of Mt. Diablo Comment
  SEINET12087144  Delphinium decorum J. T. Howell 1933-1 11279 Contra Costa Hills E of St. Mary's College Comment
  SEINET12087146  Delphinium decorum J. T. Howell 1931-1 5758 Contra Costa Shaley slope in chaparral, 7 mi E of Clayton, Mt. Diablo region Comment
  SEINET12271290  Navarretia mellita J. T. Howell 1938-1 13938 Contra Costa head of Siesta Valley Comment
  SEINET183957  Navarretia mellita John Thomas Howell 1938-6-30 13938 Contra Costa Head od Seista Valley. Comment
  SEINET3889041  Triteleia laxa John Thomas Howell 1931-5-12 6468 Contra Costa Oakland Hills.; 0 Comment
  SEINET7262189 Image available Solanum umbelliferum J. T. Howell 1933-5-14 11291 Contra Costa E of St. Mary's College Comment
  UC1988933  Pogogyne serpylloides John Thomas Howell 1930-4-22 4747 Contra Costa Bald Peak Comment
  UC421583  Pogogyne serpylloides John Thomas Howell 1930-4-22 4747 Contra Costa Bald Peak Comment
  UC473576  Atriplex triangularis John Thomas Howell 1931-10-31 8163 Contra Costa Bay Point Comment
  UC691444  Lactuca virosa J. T. Howell 1942-7-1 17040 Contra Costa Comment
  UCD116644  Malva parviflora John Thomas Howell; Gordon H, True 1972-6-29 48923 Contra Costa Byron Hot Springs Road southeast of Byron. Comment
  UCD119619  Amsinckia intermedia John Thomas Howell 1933-5-14 11224 Contra Costa St. Mary's College. Comment
  UCD133508  Lactuca virosa John Thomas Howell 1943-8-22 19310 Contra Costa near head of San Leandro Creek Canyon. 243 Comment
  UCD63839  Leptochloa fusca subsp. fascicularis John Thomas Howell 1972-6-29 48944 Contra Costa along Byron Hot Springs Road, southeast of Byron. Comment
  UCD97408  Atriplex fruticulosa John Thomas Howell 1972-6-29 48917 Contra Costa on Bron Hot Springs Road southeast of Byron. Comment



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