Search Results — 350 specimen records retrieved (281 records with coordinates)
Results for search: County=CONTRA COSTA; Source=All; Collector=Mason;   

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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/).
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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  CAS-BOT-BC116451  Delphinium patens subsp. patens H. L. Mason; Robert Ornduff 1957-4-11 10620 Contra Costa Curry Canyon 3.4 miles s. of Recreation Ground Comment
  CAS-BOT-BC116454  Delphinium patens subsp. patens H. L. Mason 1928-4-29 4440 Contra Costa Sycamore Canyon, south slope of Mount Diablo Comment
  CAS-BOT-BC116455  Delphinium patens subsp. patens H. L. Mason 1925-3-10 1301 Contra Costa Mount Diablo Comment
  CAS-BOT-BC154324  Phacelia phacelioides H. L. Mason 1938-5-3 11749 Contra Costa Trail between Juniper Camp and Deer Flat, Mount Diablo Comment
  CAS-BOT-BC167442  Hesperolinon breweri Herbert L. Mason 1936-6-14 s.n. Contra Costa Ridge running south of Mount Diablo, head of Marsh Creek Comment
  CAS-BOT-BC259523  Eriogonum luteolum var. luteolum H. L. Mason 1929-9-21 5434 Contra Costa Along Marsh Creek Road three miles above Clayton Comment
  CAS-BOT-BC269822  Eriogonum nudum var. pubiflorum H. L. Mason 1929-9-21 5433 Contra Costa Along Marsh Creek Road three miles above Clayton Comment
  CAS-BOT-BC41526  Erysimum capitatum H. L. Mason 1933-4-9 7189 Contra Costa East of Antioch along the San Joaquin River. 12 Comment
  CAS-BOT-BC67405  Tropidocarpum gracile H. L. Mason 1932-3-20 6842 Contra Costa Antioch. Comment
  CAS-BOT-BC83286  Myosurus minimus H. L. Mason 1932-3-20 6854 Contra Costa Briones road. Comment
  CAS-BOT-BC83287  Myosurus minimus Herbert L. Mason 1952-4-14 14263 Contra Costa 3.5 miles south of Byron. Comment
  CAS-BOT-BC83288  Myosurus minimus Herbert L. Mason 1952-4-14 14263 Contra Costa 3.5 miles south of Byron. Comment
  CAS-BOT-BC83289  Myosurus minimus Herbert L. Mason 1952-4-14 14264 Contra Costa 3.5 miles south of Byron. Comment
  CAS-BOT-BC83291  Myosurus minimus Herbert L. Mason 1952-4-26 14268 Contra Costa 3.5 miles south of Byron. Comment
  CAS-BOT-BC83292  Myosurus minimus Herbert L. Mason 1952-4-26 14269 Contra Costa 3.5 miles south of Byron. Comment
  CAS-BOT-BC83293  Myosurus minimus Herbert L. Mason 1952-4-26 14269 Contra Costa 3.5 miles south of Byron. Comment
  CAS-BOT-BC87335  Streptanthus hispidus H. L. Mason 1938-5-3 11751 Contra Costa Mount Diablo. Trail between Juniper Camp and Deer Flat. 990 Comment
  JEPS19479  Orobanche vallicola Herbert L. Mason 1929-9-21 5432 Contra Costa 3 mi. above Clayton (Marsh Creek Rd.) Comment
  JEPS21206  Dodecatheon clevelandii subsp. patulum Herbert L. Mason 1925-2-28 1260 Contra Costa 1/2 mi e Rodeo; e of Rodeo Comment
  JEPS40029  Layia glandulosa H. L. Mason 1932-3-20 Contra Costa Antioch Comment
  JEPS40166  Ptelea crenulata H. L. Mason 1928-3-31 Contra Costa Mt. Diablo Comment
  JEPS40167  Ptelea crenulata H. L. Mason 1928-3-31 Contra Costa Mt. Diablo Comment
  JEPS40168  Ptelea crenulata H. L. Mason 1928-3-31 Contra Costa Mt. Diablo Comment
  JEPS43337  Claytonia exigua subsp. exigua H. L. Mason 1931-4-5 Contra Costa se of Mt. Diablo (on road from Marsh Creek to Livermore); Upper Marsh Creek Comment
  JEPS43452  Parietaria hespera var. californica H. L. Mason 1929-4-18 Contra Costa Nortonville; above old Coal Mine Comment
  JEPS55365  Lathyrus vestitus var. vestitus H. L. Mason 1931-4-4 Contra Costa se of Mt. Diablo; Upper Marsh Creek Comment
  NY32658  Erysimum capitatum subsp. angustatum H. L. Mason 1933-4-9 7189 Contra Costa East of Antioch along the San Joaquin River. 12.2 Comment
  POM252665  Phacelia phacelioides H. L. Mason 1938-5-3 11749 Contra Costa Trail between Juniper Camp and Deer Flat, Mount Diablo. Comment
  POM272844  Erysimum capitatum var. angustatum H. L. Mason 1933-4-9 7189 Contra Costa East of Antioch along the San Joaquin River. 12 Comment
  SBBG29885  Streptanthus hispidus H. L. Mason 1938-5-3 11751 Contra Costa trail between Juniper Camp and Deer Flat, Mt Diablo Comment
  SBBG92005  Erysimum capitatum var. capitatum H. L. Mason 1933-4-9 7189 Contra Costa E of Antioch along the San Joaquin River 12 Comment
  SD141829  Erysimum capitatum var. capitatum H. L. Mason 1933-4-9 7189 Contra Costa East of Antioch along the San Joaquin River 14 Comment
  UC1028683  Minuartia californica Herbert L. Mason 1932-3-20 6849 Contra Costa Antioch Sand Hills Comment
  UC1039519  Galium aparine Herbert L. Mason 1932-3-20 6840 Contra Costa Antioch sand hills Comment
  UC1039525  Cephalanthus occidentalis var. californicus H. L. Mason 1929-9-21 5447 Contra Costa 1 mi from Borden Highway junction with road to Antioch Comment
  UC1039536  Dodecatheon clevelandii subsp. patulum Herbert L. Mason 1929-3-15 5044 Contra Costa Nortonville Comment
  UC1039585  Dodecatheon clevelandii subsp. patulum Herbert L. Mason 1925-2-28 1260 Contra Costa 1/2 mi e Rodeo; e of Rodeo Comment
  UC1039781  Castilleja affinis subsp. affinis H. L. Mason 1928-4-29 4438 Contra Costa Mount Diablo Comment
  UC1051468  Downingia insignis Herbert L. Mason 1952-4-14 14267 Contra Costa 3.5 mi s Byron Comment
  UC1051469  Psilocarphus brevissimus var. brevissimus Herbert L. Mason 1952-4-14 14266 Contra Costa 3.5 mi s Byron Comment
  UC1051490  Linanthus liniflorus Herbert L. Mason 1952-4-14 14265 Contra Costa 3.5 mi s Byron Comment
  UC1051497  Lasthenia fremontii Herbert L. Mason 1952-4-14 Contra Costa 3.5 mi s Byron Comment
  UC1055936  Pilularia americana Herbert L. Mason 1952-4-14 14261 Contra Costa 3.5 mi s Byron Comment
  UC1076228  Lupinus bicolor Herbert L. Mason 1931-4-5 5821 Contra Costa Antioch sandhills Comment
  UC1076270  Centromadia fitchii Herbert L. Mason 1929-9-21 5433 Contra Costa 3 mi above Clayton (Marsh Creek Road) Comment
  UC1076297  Orobanche vallicola Herbert L. Mason 1929-9-21 5432 Contra Costa 3 mi above Clayton (Marsh Creek Road); Marsh Creek Road Comment
  UC1076301  Orobanche fasciculata Herbert L. Mason 1926-5-7 2704 Contra Costa Near Summit of Mount Diablo. Comment
  UC1076313  Orobanche uniflora subsp. occidentalis Herbert L. Mason 1931-4-5 5828 Contra Costa Road between Marsh Creek and Livermore. Comment
  UC1076314  Monolepis nuttalliana Herbert L. Mason 1931-4-5 5891 Contra Costa Antioch sandhills Comment
  UC1076338  Dryopteris arguta Herbert L. Mason 1924-11-23 1166 Contra Costa via Cashion Creek Las Trampas Ridge Comment
  UC1076351  Pinus coulteri Herbert L. Mason 1929-10-8 5480 Contra Costa Nortonville Comment
  UC1076352  Pinus sabiniana Herbert L. Mason 1929-10-8 5481 Contra Costa Nortonville Comment
  UC1076380  Juniperus californica Herbert L. Mason 1923-11-12 850 Contra Costa middle slopes Mt. Diablo Comment
  UC1076412  Symphoricarpos mollis Herbert L. Mason 1929-5-7 5264 Contra Costa Moraga Ridge Comment
  UC1076434  Berberis pinnata Herbert L. Mason 1925-3-10 1298 Contra Costa Sycamore Canyon; Mt Diablo Comment
  UC1076516  Gutierrezia californica H. L. Mason 1929-9-21 5435 Contra Costa 3 mi above Clayton (Marsh Creek road) Comment
  UC1077124  Pilularia americana Herbert L. Mason 1932-3-20 6851 Contra Costa Deer Valley Comment
  UC1081509  Castilleja foliolosa H. L. Mason 1928-3-4 4169 Contra Costa Shell Ridge Comment
  UC1084518  Plagiobothrys nothofulvus Chas. T. Mason 1949-3-30 Contra Costa Byron Comment
  UC1093922  Alnus rhombifolia Herbert L. Mason 1924-11-23 1159 Contra Costa Las Trampas Ridge; via Cashion Comment
  UC1093927  Centromadia fitchii Herbert L. Mason 1929-9-21 5430 Contra Costa 3 mi above Clayton (Marsh Creek Road) Comment
  UC1099993  Zannichellia palustris Herbert L. Mason 1929-2-10 Contra Costa Nortonville Comment
  UC1101327  Myosurus minimus Herbert L. Mason 1952-4-14 14262 a Contra Costa 3.5 mi s of Byron Comment
  UC1101328  Myosurus minimus Herbert L. Mason 1952-4-14 14262 Contra Costa 2.5 mi s of Byron Comment
  UC1101329  Myosurus sessilis Herbert L. Mason 1952-4-26 14272 Contra Costa 3.5 mi s of Byron Comment
  UC1101330  Myosurus sessilis Herbert L. Mason 1952-4-14 14263 Contra Costa 3.5 mi s of Byron Comment
  UC1101331  Myosurus sessilis Herbert L. Mason 1952-4-26 14269 Contra Costa 3.5 mi s of Byron Comment
  UC1101332  Myosurus sessilis Herbert L. Mason 1952-4-26 14270 Contra Costa 3.5 mi s of Byron Comment
  UC1101333  Myosurus sessilis Herbert L. Mason 1952-4-14 14264 Contra Costa 3.5 mi s of Byron Comment
  UC1101334  Myosurus minimus Herbert L. Mason 1952-4-26 14268 Contra Costa 3.5 mi s of Byron Comment
  UC1101358  Myosurus Herbert L. Mason 1952-3-13 14200 A Contra Costa 3.3 mi s Byron Comment
  UC1101359  Myosurus sessilis Herbert L. Mason 1952-3-13 14200 Contra Costa 3.3 mi s Bryon Comment
  UC1101455  Lilaeopsis masonii Herbert L. Mason April, 1954 Contra Costa n. end Antioch Bridge Comment
  UC1109005  Zannichellia palustris H. L. Mason October 1929 Contra Costa Nortonville Comment
  UC1111009  Androsace elongata subsp. acuta Herbert L. Mason 1928-3-4 4166 Contra Costa Shell Ridge Comment
  UC1111016  Lilaeopsis masonii Herbert L. Mason October, 1942 12556 Contra Costa Antioch, Lower San Joaquin R. Comment
  UC1111024  Dodecatheon hendersonii Herbert L. Mason 1926-3-7 2700 Contra Costa Mt. Diablo Comment
  UC1111579  Parietaria hespera var. californica Herbert L. Mason 1929-5-5 5260 Contra Costa Nortonville Comment
  UC1178018  Lilium pardalinum Herbert L. Mason 1955-7-14 14633 Contra Costa 0.5 mi e Antioch Bridge Comment
  UC1178020  Centaurium muehlenbergii Herbert L. Mason 1955-7-14 14637 Contra Costa 0.5 mi e Antioch Bridge Comment
  UC1178021  Samolus parviflorus Herbert L. Mason 1955-7-14 14634 Contra Costa 1/2 mi e of Antioch Bridge Comment
  UC1178022  Lythrum californicum Herbert L. Mason 1955-7-14 14636 Contra Costa 1/2 mi e of Antioch Bridge Comment
  UC1178029  Centunculus minimus Herbert L. Mason 1955-7-14 14632 a Contra Costa 1/2 mi e of Antioch Bridge Comment
  UC1191771  Solanum elaeagnifolium Herbert L. Mason, Verne Grant 1946-9-3 13097 Contra Costa 2 mi w of Pittsburg Comment
  UC1199816  Chenopodium californicum Herbert L. Mason 1929-3-31 5158 Contra Costa Antioch Sacramento River Comment
  UC1713660  Scutellaria tuberosa Herbert L. Mason 1928-4-15 4342 Contra Costa top of Moraga Ridge Comment
  UC1738084  Myosurus minimus H. L. Mason 1957-3-15 14268 B-4 Contra Costa 3 mi S of Byron ( on road to Herdlyn) Comment
  UC1738085  Myosurus minimus H. L. Mason 1957-3-22 14268 B-6 Contra Costa 3 mi S of Byron ( on road to Herdlyn) Comment
  UC1738086  Myosurus minimus H. L. Mason 1957-3-15 14268 B-2 Contra Costa 3 mi S of Byron ( on road to Herdlyn) Comment
  UC1738087  Myosurus minimus H. L. Mason 1956-5-24 14268 B-1 Contra Costa 3 mi S of Byron ( on the road to Herdlyn) Comment
  UC534852  Erysimum capitatum var. capitatum H. L. Mason 1933-4-9 7189 Contra Costa sand hills along river e Antioch; San Joaquin River 12 Comment
  UC536676  Solanum umbelliferum Herbert L. Mason 1935-8-23 Contra Costa Cashion Canyon, Saint Mary's College Cashion Canyon; , Saint Mary's College Comment
  UC543763  Asarum caudatum Herbert L. Mason 1925-9-27 2236 Contra Costa San Leandro Canyon (Redwood Canyon); Oakland Hills Comment
  UC552339  Psilocarphus oregonus Lucile R. Mason 1935-4-9 Contra Costa Marsh Creek Comment
  UC555354  Trifolium depauperatum var. truncatum H. L. Mason 1929-4-25 5208 Contra Costa Marsh Creek Rd Comment
  UC555355  Trifolium depauperatum var. truncatum H. L. Mason 1929-3-15 5061 Contra Costa ca 5 mi from Brentwood (Marsh Creek Rd) Comment
  UC555416  Lotus micranthus H. L. Mason 1928-4-29 4428 Contra Costa Sycamore Canyon, s slope of Mount Diablo Mount Diablo Comment
  UC555418  Lotus strigosus H. L. Mason 1932-3-20 6839 Contra Costa Antioch Comment
  UC555420  Lotus wrangelianus H. L. Mason 1929-5-7 5263 Contra Costa Moraga Ridge Comment
  UC555421  Lotus wrangelianus H. L. Mason 1929-3-29 5124 Contra Costa Mt. Diablo Comment
  UC555448  Trifolium gracilentum H. L. Mason 1929-3-31 5150 Contra Costa along San Joaquin River; Antioch Comment
  UC555454  Trifolium fucatum H. L. Mason 1929-3-31 5143 Contra Costa Briones Valley Comment
  UC555456  Trifolium ciliolatum H. L. Mason 1929-4-25 5204 Contra Costa Marsh Creek Rd Comment
  UC555459  Trifolium gracilentum H. L. Mason 1932-3-20 6844 Contra Costa Antioch sand hills Comment
  UC555481  Trifolium albopurpureum var. albopurpureum H. L. Mason 1928-4-26 4384 Contra Costa Berkeley-Oakland hills Comment
  UC555482  Trifolium albopurpureum var. albopurpureum H. L. Mason 1928-4-29 4437 Contra Costa Sycamore Canyon Mt. Diablo, south slope Comment
  UC555486  Trifolium albopurpureum var. albopurpureum H. L. Mason 1929-3-29 5119 Contra Costa Mt. Diablo 762 Comment
  UC555490  Trifolium albopurpureum H. L. Mason 1928-4-29 4433 Contra Costa Sycamore Canyon Mt. Diablo, south slope Comment
  UC555497  Rosa gymnocarpa Herbert L. Mason 1924-11-23 1172 Contra Costa Cashion Creek Las Trampas Ridge Comment
  UC555542  Lotus junceus var. biolettii H. L. Mason 1929-5-7 5262 Contra Costa Moraga Ridge Comment
  UC555578  Trifolium willdenovii H. L. Mason 1929-4-25 5206 Contra Costa Marsh Creek Rd Comment
  UC555582  Trifolium willdenovii H. L. Mason 1928-4-13 4307 Contra Costa Richmond waterfront Comment
  UC555592  Trifolium gracilentum H. L. Mason 1928-4-13 4301 Contra Costa Richmond waterfront Comment
  UC555598  Trifolium ciliolatum H. L. Mason 1928-4-26 4383 Contra Costa Berkeley-Oakland HIlls Comment
  UC555601  Trifolium bifidum var. decipiens H. L. Mason 1929-4-25 5205 Contra Costa Marsh Creek Rd Comment
  UC555606  Trifolium macraei H. L. Mason 1928-4-13 4304 Contra Costa Richmond waterfront Comment
  UC555611  Trifolium microdon H. L. Mason 1928-4-13 4306 Contra Costa Richmond waterfront Comment
  UC555617  Trifolium albopurpureum var. albopurpureum H. L. Mason 1929-5-7 5261 Contra Costa Moraga Ridge Comment
  UC555619  Trifolium macraei H. L. Mason 1928-4-13 4303 Contra Costa Richmond waterfront Comment
  UC555647  Rosa gymnocarpa Herbert L. Mason 1924-11-23 1161 Contra Costa Cashion Creek Las Trampas Ridge Comment
  UC555648  Rosa californica Herbert L. Mason 1924-11-23 1167 Contra Costa Cashion Canyon Las Trampas Ridge Comment
  UC555660  Cercocarpus betuloides var. betuloides Herbert L. Mason 1926-3-7 2710 Contra Costa Mount Diablo Comment
  UC558458  Hesperolinon breweri Herbert L. Mason 1936-6-14 Contra Costa ridge running s Mount Diablo (head of Creek); Marsh Creek Comment
  UC55887  Trifolium bifidum var. decipiens H. L. Mason 1901-4-5 1735 Contra Costa Mt. Diablo 670 Comment
  UC565460  Scutellaria tuberosa Herbert L. Mason 1928-4-15 4342 Contra Costa top of Moraga Ridge Comment
  UC565476  Boechera breweri subsp. breweri Herbert L. Mason 1926-3-7 2796 Contra Costa Summit of Mt. Diablo Mt. Diablo Comment
  UC565479  Blennosperma nanum var. nanum H. L. Mason 1929-3-15 5045 Contra Costa just s of Nortonville Comment
  UC565499  Microseris douglasii subsp. douglasii H. L. Mason 1929-3-31 5142 Contra Costa Briones Valley Comment
  UC565564  Chaenactis glabriuscula var. glabriuscula H. L. Mason 1929-3-31 5157 Contra Costa Antioch, sand dikes along San Joaquin River San Joaquin River, Antioch Comment
  UC565627  Chaenactis glabriuscula var. glabriuscula H. L. Mason 1931-4-5 5817 Contra Costa Antioch sandhills Antioch Comment
  UC566668  Penstemon centranthifolius H. L. Mason 1929-3-31 5156 Contra Costa sand dike along San Joaquin River (Antioch); sand dike along San Joaquin River, Antioch Comment
  UC566690  Helenium puberulum H. L. Mason 1924-11-23 1162 Contra Costa Las Trampas Creek Comment
  UC566713  Lasthenia gracilis H. L. Mason 1929-3-31 5147 Contra Costa Briones Valley Comment
  UC566714  Lasthenia gracilis H. L. Mason 1929-3-31 5154 Contra Costa along San Joaquin River; , Antioch Comment
  UC566823  Sanicula tuberosa H. L. Mason 1929-3-15 5049 Contra Costa Nortonville Comment
  UC566855  Bowlesia incana H. L. Mason 1928-4-1 4272 Contra Costa Hills n of Mount Diablo (back of Pittsburg) Comment
  UC566856  Sanicula crassicaulis H. L. Mason 1928-4-13 4305 Contra Costa Richmond Waterfront Comment
  UC566857  Bowlesia incana H. L. Mason 1928-4-29 4419 Contra Costa Mount Diablo, Sycamore Canyon Sycamore Canyon; Mount Diablo, Sycamore Canyon Comment
  UC566877  Bowlesia incana H. L. Mason 1928-3-4 4169 a Contra Costa Shell Ridge Comment
  UC566895  Tauschia hartwegii H. L. Mason 1928-4-26 4387 Contra Costa Berkeley-Oakland Hills Comment
  UC570718  Trichostema lanceolatum Herbert L. Mason 1923-11-12 854 Contra Costa Mount Diablo, middle slopes Comment
  UC570761  Callitriche marginata H. L. Mason 1932-3-16 6810 Contra Costa At east edge Walnut Creek, along S.P. Railroad track Comment
  UC570769  Callitriche marginata H. L. Mason 1932-3-20 6852 Contra Costa Deer Valley; Briones Road Comment
  UC570798  Euphorbia crenulata H. L. Mason 1926-3-7 2701 Contra Costa Mount Diablo Comment
  UC570820  Ribes malvaceum Herbert L. Mason 1926-3-7 2708 Contra Costa Summit Mt. Diablo Comment
  UC570821  Ribes malvaceum Herbert L. Mason 1924-11-23 1168 Contra Costa Las Trampas Ridge Comment
  UC570838  Ribes californicum Herbert L. Mason 1926-3-7 2709 Contra Costa Summit Mt. Diablo Comment
  UC570875  Lithophragma affine H. L. Mason 1932-3-20 6843 Contra Costa Antioch Sand Hills Comment
Read comments Oct 9 2006
  UC570944  Saxifraga californica Herbert L. Mason 1926-3-7 2702 Contra Costa Mount Diablo Comment
  UC570964  Ribes sanguineum var. glutinosum Herbert L. Mason 1925-9-12 2224 Contra Costa head San Leandro Canyon; Oakland Hills Comment
  UC571094  Arbutus menziesii H. L. Mason 1924-11-23 1160 Contra Costa Cashion Canyon Comment
  UC571100  Ptelea crenulata H. L. Mason 1928-4-1 4273 Contra Costa hills n Mount Diablo (canyon back of Pittsburg) Comment
  UC571101  Ptelea crenulata H. L. Mason 1928-4-1 4270 Contra Costa hills n Mount Diablo (canyon back of Antioch hills) Comment
  UC571102  Ptelea crenulata H. L. Mason 1928-4-1 4269 Contra Costa n of Mt. Diablo (canyon back of Antioch hills) Comment
  UC571138  Erodium macrophyllum H. L. Mason 1929-4-25 5209 Contra Costa Briones Road to Antioch Comment
  UC571139  Erodium macrophyllum H. L. Mason 1929-3-15 5060 Contra Costa about 5 mi from Brentwood (Marsh Creek Road) Comment
  UC573057  Pectocarya pusilla H. L. Mason 1931-4-5 5827 Contra Costa rd between Marsh Creek and Livermore Comment
  UC573059  Pectocarya pusilla H. L. Mason 1929-4-25 5210 Contra Costa Briones Rd to Antioch Comment
  UC573066  Plagiobothrys stipitatus var. stipitatus H. L. Mason 1929-3-31 5145 Contra Costa Briones Valley Comment
  UC573067  Plagiobothrys bracteatus H. L. Mason 1928-4-15 4343 Contra Costa top Moraga Ridge Comment
  UC573071  Plagiobothrys tenellus H. L. Mason 1932-3-20 6847 Contra Costa Antioch sand hills Comment
  UC573079  Plagiobothrys stipitatus var. micranthus H. L. Mason 1929-3-31 5144 Contra Costa Briones Valley Comment
  UC573135  Pectocarya penicillata H. L. Mason 1932-3-20 6845 Contra Costa Antioch sand hills Comment
  UC581133  Aristolochia californica H. L. Mason 1934-1-20 7995 Contra Costa <Casihon> Creek (Las Trampas Creek) Comment
  UC592124  Nemophila heterophylla H. L. Mason 1928-4-29 4430 Contra Costa Sycamore Canyon , Sycamore Canyon (s slope Mount Diablo) Comment
  UC592125  Nemophila heterophylla H. L. Mason 1929-3-29 5125 Contra Costa Mount Diablo 762 Comment
  UC592126  Nemophila pedunculata H. L. Mason 1932-3-20 6841 Contra Costa Antioch sand hills Comment
  UC592149  Streptanthus albidus subsp. peramoenus H. L. Mason 1928-4-26 4389 Contra Costa hillsides Berkeley hills Comment
  UC592151  Streptanthus hispidus H. L. Mason 1929-3-29 5120 Contra Costa Mount Diablo 762 Comment
  UC592179  Pholistoma membranaceum H. L. Mason 1929-3-15 5046 Contra Costa Nortonville Comment
  UC592184  Eucrypta chrysanthemifolia var. chrysanthemifolia H. L. Mason 1928-4-29 4424 Contra Costa Mount Diablo Comment
  UC592185  Eucrypta chrysanthemifolia var. chrysanthemifolia H. L. Mason 1925-3-10 1292 Contra Costa Mount Diablo Comment
  UC592190  Nemophila menziesii H. L. Mason 1932-3-20 6837 Contra Costa Antioch sand hills Comment
  UC592192  Nemophila heterophylla H. L. Mason 1929-3-15 5052 Contra Costa Nortonville; on grassy hillslopes Comment
  UC604428  Phacelia phacelioides H. L. Mason 1938-5-3 11749 Contra Costa trail between Juniper Camp and Deer Flat; Mount Diablo Comment
  UC604429  Phacelia breweri H. L. Mason 1938-5-3 11750 Contra Costa trail between Juniper Camp and Deer Flat; Mount Diablo 990 Comment
  UC629716  Streptanthus hispidus H. L. Mason 1938-5-3 11751 Contra Costa trail between Juniper Camp and Deer Flat; Mount Diablo 990 Comment
  UC634568  Ceanothus cuneatus var. cuneatus H. L. Mason March, 1925 Contra Costa Mount Diablo Comment
  UC634752  Epilobium canum subsp. canum Herbert L. Mason 1923-11-12 852 Contra Costa lower slopes Mt. Diablo Comment
  UC634754  Epilobium canum subsp. canum H. L. Mason 1924-11-23 1169 Contra Costa Las Trampas Ridge Comment
  UC634790  Garrya flavescens H. L. Mason 1926-3-7 2711 Contra Costa Mount Diablo Comment
  UC634816  Garrya elliptica H. L. Mason 1925-9-12 2223 Contra Costa head of San Leandro Creek Canyon; Oakland Hills Comment
  UC634868  Melissa officinalis H. L. Mason 1925-9-17 2235 Contra Costa stream in Redwood Canyon Redwood Canyon Comment
  UC634890  Dendromecon rigida H. L. Mason 1925-1-11 1177 Contra Costa Moraga Ridge Comment
  UC634921  Salvia mellifera H. L. Mason 1925-3-10 1291 Contra Costa Mount Diablo Comment
  UC634923  Salvia carduacea H. L. Mason 1929-3-31 5146 Contra Costa Briones Valley Comment
  UC634924  Salvia columbariae H. L. Mason 1929-3-29 5121 Contra Costa Mt. Diablo 762 Comment
  UC634927  Myosurus minimus H. L. Mason 1932-3-20 6854 Contra Costa Briones Road Comment
  UC634940  Claytonia exigua subsp. exigua H. L. Mason 1925-3-10 1296 Contra Costa higher slopes Mt. Diablo Comment
  UC634958  Myosurus minimus H. L. Mason 1931-4-5 5824 Contra Costa Road between Marsh Creek and Livermore Comment
  UC635005  Eriogonum nudum var. pubiflorum H. L. Mason 1929-9-21 5433 Contra Costa 3 mi above Clayton (Marsh Creek road) Comment
  UC635006  Eriogonum luteolum var. luteolum H. L. Mason 1929-9-21 5434 Contra Costa 3 mi above, along Marsh Creek road Clayton Comment
  UC635097  Ranunculus canus var. canus H. L. Mason 1929-3-15 5055 Contra Costa on summit of hill east of Nortonville Comment
  UC635248  Allium serra H. L. Mason 1928-4-29 4421 Contra Costa Sycamore Canyon, s slope of Mount Diablo Mount Diablo, Sycamore Canyon Comment
  UC635249  Allium serra H. L. Mason 1929-3-29 5135 Contra Costa Marsh Creek Road 2 mi e Claton; Marsh Creek Road Comment
  UC635287  Camissonia campestris subsp. campestris H. L. Mason 1929-3-31 5153 Contra Costa Antioch San Joaquin River (sand dike along river) Comment
  UC635291  Camissonia campestris subsp. campestris H. L. Mason 1931-4-5 5820 Contra Costa Antioch sandhills Comment
  UC635299  Astragalus gambelianus H. L. Mason 1928-4-15 4345 Contra Costa Moraga Ridge Comment
  UC635302  Astragalus gambelianus H. L. Mason 1928-4-26 4380 Contra Costa Berkeley-Oakland Hills Comment
  UC635345  Delphinium patens subsp. patens H. L. Mason 1928-4-29 4440 Contra Costa s slope of mt Mount Diablo, Sycamore Canyon Comment
  UC635349  Delphinium H. L. Mason 1925-3-10 1301 Contra Costa Mount Diablo; along lower canyon slopes Comment
  UC635385  Oenothera deltoides subsp. howellii H. L. Mason 1929-3-31 5163 Contra Costa Antioch San Joaquin River (sand dike along river) Comment
  UC635400  Camissoniopsis intermedia H. L. Mason 1928-4-29 4436 Contra Costa Sycamore Canyon Mount Diablo (s slope of mt.) Comment
  UC635405  Camissoniopsis micrantha H. L. Mason 1929-3-31 5160 Contra Costa Antioch San Joaquin River (sand dike along river) Comment
  UC635407  Camissoniopsis intermedia H. L. Mason 1929-3-15 5048 Contra Costa Nortonville Comment
  UC635408  Camissoniopsis micrantha H. L. Mason 1932-3-20 6850 Contra Costa sand hills near Antioch Comment
  UC635473  Dodecatheon clevelandii subsp. patulum H. L. Mason 1934-4-4 8058 Contra Costa Marsh Creek Road Comment
  UC635477  Stylomecon heterophylla H. L. Mason 1928-4-29 4442 Contra Costa s slope Mount Diablo; s slope of Mount Diablo, Sycamore Canyon Comment
  UC635478  Stylomecon heterophylla H. L. Mason 1928-4-1 4271 Contra Costa hills n Mount Diablo (canyon back of Pittsburg); hills n of Mount Diablo Comment
  UC635484  Meconella oregana Herbert L. Mason 1927-4-16 3666 Contra Costa Wild Cat Canyon Berkeley Hills Comment
  UC635648  Githopsis specularioides H. L. Mason 1928-4-29 4429 Contra Costa Sycamore Canyon, s slopes of Mt. Diablo Mt. Diablo Comment
  UC635732  Triteleia laxa H. L. Mason 1929-3-15 5062 Contra Costa about 5 mi from Brentwood (Marsh Creek Road) Comment
  UC672112  Fritillaria affinis Herbert L. Mason 1925-3-10 1293 Contra Costa Mount Diablo, Sycamore Canyon Sycamore Canyon; Mount Diablo, Sycamore Canyon Comment
  UC672117  Fritillaria agrestis Herbert L. Mason 1929-3-15 5057 Contra Costa about 5 mi from Brentwood (Marsh Creek Road); Marsh Creek Road Comment
  UC672145  Calochortus pulchellus Herbert L. Mason 1928-4-29 4420 Contra Costa Sycamore Canyon Mount Diablo Comment
  UC672198  Gamochaeta ustulata H. L. Mason 1928-4-12 4302 Contra Costa Richmond waterfront Comment
  UC672236  Logfia gallica H. L. Mason 1928-4-26 4386 Contra Costa Berkeley-Oakland Hills Comment
  UC672254  Ericameria linearifolia H. L. Mason 1926-3-7 2707 Contra Costa near summit Mount Diablo Comment
  UC672340  Phacelia douglasii Herbert L. Mason 1929-3-31 5161 Contra Costa dunes along river near Antioch; San Joaquin River Comment
  UC672342  Phacelia douglasii H. L. Mason 1932-3-20 6838 Contra Costa Antioch Sand Hills Comment
  UC672349  Phacelia tanacetifolia Herbert L. Mason 1929-3-31 5140 Contra Costa hills n Mt. Diablo (Briones Rd) Comment
  UC672376  Emmenanthe penduliflora Herbert L. Mason 1928-4-22 4434 Contra Costa Sycamore Canyon, south slope of Mount Diablo Comment
  UC672384  Phacelia imbricata Herbert L. Mason 1928-4-26 4388 Contra Costa slopes to n of Lake Temescal; Berkeley Hills Comment
  UC672385  Phacelia californica Herbert L. Mason 1928-4-13 4300 Contra Costa cliffs facing Bay Richmond Comment
  UC672410  Phacelia ciliata var. ciliata Herbert L. Mason 1929-3-31 5139 Contra Costa Briones Road Hills northeast of Mount Diablo Comment
  UC672416  Phacelia distans Herbert L. Mason 1928-4-29 4422 Contra Costa Sycamore Canyon Mount Diablo Comment
  UC672426  Phacelia distans Herbert L. Mason 1929-3-29 5122 Contra Costa Mount Diablo 762 Comment
  UC672438  Anemopsis californica Herbert L. Mason 1929-9-21 5437 Contra Costa 3 mi above Clayton (Marsh Creek Road); Marsh Creek Road Comment
  UC672467  Collinsia sparsiflora var. collina H. L. Mason 1925-3-10 1295 Contra Costa Mount Diablo. Comment
  UC672470  Collinsia sparsiflora var. collina Herbert L. Mason 1929-3-15 5051 Contra Costa Nortonville Comment
  UC672473  Collinsia sparsiflora var. collina H. L. Mason 1928-4-29 4439 Contra Costa road opposite Devils Slide Mount Diablo 365 Comment
  UC672665  Mentzelia micrantha H. L. Mason 1928-4-29 4435 Contra Costa Mount Diablo, Sycamore Canyon Comment
  UC673302  Tropidocarpum gracile H. L. Mason 1932-3-20 6842 Contra Costa Antioch sand hills Comment
  UC673305  Tropidocarpum gracile H. L. Mason 1929-3-31 5152 Contra Costa sand dike along river at Antioch; San Joaquin River Comment
  UC673338  Tropidocarpum gracile H. L. Mason 1929-3-31 5148 Contra Costa in pastures Briones Valley Comment
  UC673344  Athysanus pusillus H. L. Mason 1929-3-29 5117 Contra Costa Mount Diablo 1066 Comment
  UC673358  Dodecatheon clevelandii subsp. patulum Herbert L. Mason 1925-2-28 1260 Contra Costa 1/2 mi e Rodeo; e of Rodeo Comment
  UC673394  Dodecatheon hendersonii Herbert L. Mason 1925-3-10 1294 Contra Costa Mount Diablo Mount Diablo (open slopes) Comment
  UC673401  Dodecatheon hendersonii Herbert L. Mason 1929-3-15 5047 Contra Costa s Nortonville; s of Nortonville Comment
  UC673440  Castilleja exserta subsp. exserta H. L. Mason 1929-3-15 5059 Contra Costa about 5 mi from Brentwood (along Marsh Creek Road) Comment
  UC673456  Castilleja exserta subsp. exserta H. L. Mason 1928-3-4 4168 Contra Costa Shell Ridge Comment
  UC673501  Dodecatheon clevelandii subsp. patulum Herbert L. Mason 1929-3-15 5056 Contra Costa summit of hill e Nortonville; e of Nortonville Comment
  UC673518  Erysimum capitatum var. capitatum H. L. Mason 1931-4-5 5822 Contra Costa Antioch sand hills Comment
  UC694145  Psilocarphus tenellus H. L. Mason 1932-4-24 6964 Contra Costa Marsh Creek Road Comment
  UC694150  Psilocarphus tenellus H. L. Mason 1928-4-29 4425 Contra Costa Mt. Diablo Comment
  UC694154  Psilocarphus tenellus Herbert L. Mason 1932-5-4 7056 Contra Costa Laundry Farm Oakland Hills Comment
  UC775175  Lotus denticulatus Herbert L. Mason 1945-5-31 Contra Costa nw of St. Mary's College; Cashion Canyon Comment
  UC908108  Gilia capitata subsp. staminea Herbert L. Mason 1929-3-31 5159 Contra Costa Antioch; San Joaquin River Comment
  UC908353  Gilia clivorum Herbert L. Mason 1938-5-3 11752 Contra Costa trail between Juniper Camp and Deer Flat (Mount Diablo); , btw Juniper Camp and Deer Flat 990 Comment
  UC908478  Allophyllum gilioides subsp. gilioides Herbert L. Mason 1928-1 4427 Contra Costa s. slope Mt. Diablo (Sycamore Canyon); , Sycamore Canyon Comment
  UC908576  Gilia tricolor subsp. tricolor Herbert L. Mason 1929-3-29 5118 Contra Costa Mount Diablo 762 Comment
  UC908611  Linanthus pygmaeus subsp. continentalis Herbert L. Mason 1928-4-29 4431 Contra Costa Sycamore Canyon Mount Diablo (s slope of Mount Diablo) Comment
  UC908685  Linanthus androsaceus Herbert L. Mason 1928-4-15 4349 Contra Costa e end Moraga Ridge Comment
  UC908741  Collomia heterophylla Herbert L. Mason 1928-4-15 4361 Contra Costa woods along trail Moraga Ridge Comment
  UC908864  Gilia achilleifolia subsp. achilleifolia Herbert L. Mason 1929-3-29 5123 Contra Costa Mount Diablo 762 Comment
  UC908868  Eriastrum pluriflorum Herbert L. Mason 1933-6-10 7252 Contra Costa Brentwood Comment
  UC908901  Gilia achilleifolia subsp. achilleifolia Herbert L. Mason 1938-5-3 11753 Contra Costa trail between Juniper Camp and Deer Flat (Mount Diablo); , trail bet Juniper Camp and Deer Flat 990 Comment
  UC908902  Gilia achilleifolia subsp. multicaulis Herbert L. Mason 1928-4-15 4357 Contra Costa top of Morago Ridge Morago Ridge Comment
  UC908952  Linanthus androsaceus Herbert L. Mason 1928-4-29 4441 Contra Costa Sycamore Canyon Mount Diablo (s slope of Mt. Diablo) Comment
  UC909003  Gilia clivorum Herbert L. Mason 1934-4-8 8052 Contra Costa 11 mi s Marsh Creek Road (on road from Marsh Creek to Livermore); on rd from Marsh Creek to Livermore 609 Comment
  UC909004  Gilia clivorum Herbert L. Mason 1928-4-15 4358 Contra Costa top Moraga Ridge; top of Moraga Ridge Comment
  UC909027  Gilia achilleifolia subsp. multicaulis Herbert L. Mason 1934-3-31 8053 Contra Costa 11 mi s Marsh Creek Road (on road from Marsh Creek to Livermore); 11 mi s Marsh Creek Road, rd from Marsh Creek to Livermore 609 Comment
  UC909033  Gilia clivorum Herbert L. Mason 1929-3-29 5128 Contra Costa 2 mi e Clayton (Marsh Creek Road); e of Clayton Comment
  UC912220  Bidens frondosa Herbert L. Mason 1929-9-21 5446 Contra Costa 2.6 mi ne of Byron (Borden Highway); Borden Highway Comment
  UC912261  Logfia filaginoides Lucile Mason 1934-4-8 Contra Costa Marsh Creek- Livermore Road; Curry Creek Comment
  UC912272  Centromadia pungens subsp. pungens H. L. Mason 1929-9-21 5438 Contra Costa Marsh Creek Road Comment
  UC912297  Logfia filaginoides Herbert L. Mason 1928-4-26 4385 Contra Costa Berkeley-Oakland Hills Comment
  UC912309  Gutierrezia californica Herbert L. Mason 1929-9-21 5435 Contra Costa 3 mi above Clayton (Marsh Creek Road) Comment
  UC912326  Holocarpha virgata subsp. virgata Herbert L. Mason 1929-9-21 5431 Contra Costa 3 mi above Clayton (summit of grade, Marsh Creek Road) Comment
  UC912408  Micropus californicus var. californicus Herbert L. Mason 1929-3-29 5129 Contra Costa Marsh Creek Road 2 mi e Clayton; Marsh Creek Road Comment
  UC912409  Logfia filaginoides Herbert L. Mason 1928-4-29 4426 Contra Costa Mount Diablo Comment
  UC912566  Hemizonia congesta subsp. luzulifolia Herbert L. Mason 7058 Contra Costa Laundry Farm Oakland Hills Comment
  UC912567  Delphinium hesperium subsp. pallescens H. L. Mason 1928-4-29 4423 Contra Costa s slope of mt Mount Diablo, Sycamore Canyon Comment
  UC912574  Layia chrysanthemoides Herbert L. Mason 1929-3-31 5151 Contra Costa Sacramento River at Antioch; Sacramento River Comment
  UC912575  Layia glandulosa Herbert L. Mason 1929-3-31 5155 Contra Costa at Antioch (along Sacramento River); along Sacramento River Comment
  UC912592  Madia exigua Herbert L. Mason 1932-5-4 7053 Contra Costa Laundry Farm Oakland Hills Comment
  UC912601  Lagophylla ramosissima Herbert L. Mason 1929-9-21 5432 a Contra Costa Marsh Creek road 3 mi above Clayton (summit of grade) Comment
  UC912661  Poa howellii Herbert L. Mason 1928-4-15 4350 Contra Costa e end Moraga Ridge Comment
  UC964759  Galium murale Herbert L. Mason 1944-3-17 Contra Costa Briones Hills Comment
  UC964777  Lathyrus vestitus var. vestitus Herbert L. Mason 1931-4-5 5829 Contra Costa road between Marsh Creek and Livermore Comment
  UC971818  Limnanthes douglasii subsp. rosea Charles T. Mason Jr. 1948-3-27 1134 Contra Costa 0.1 mi s Byron Hot Springs road (along Byron-Bethany road) Comment
  CAS-BOT-BC116453  Delphinium patens subsp. patens H. L. Mason 1929-3-29 5136 Contra Costa Marsh Creek Road two miles above Clayton Comment
  CAS-BOT-BC163674  Clarkia purpurea subsp. quadrivulnera H. L. Mason 1928-4-26 4379 Contra Costa Around Berkeley and Oakland Comment
  CAS-BOT-BC178471  Astragalus gambelianus H. L. Mason 1928-4-15 4345 Contra Costa East-facing grassy slope, Moraga Ridge Comment
  CAS-BOT-BC178472  Astragalus gambelianus H. L. Mason 1928-4-26 4380 Contra Costa Berkely - Oakland Hills Comment
  CAS-BOT-BC342346  Logfia gallica H. L. Mason 1928-4-26 4386 Contra Costa Berkeley-Oakland Hills Comment
  CAS-BOT-BC361693  Psilocarphus brevissimus var. brevissimus Herbert L. Mason 1952-4-14 14266 Contra Costa Vernal Pool 3.5 miles south of Byron Comment
  CAS-BOT-BC441217  Luzula macrantha H. L. Mason 1917-3-19 59 Contra Costa Lake Temescal Comment
  CAS-BOT-BC454204  Zannichellia palustris Herbert L. Mason 1929-2-10 s.n. Contra Costa Nortonville Comment
  CAS-BOT-BC67406  Tropidocarpum gracile H. L. Mason 1929-3-31 5152 Contra Costa Along San Joaquin River at Antioch. Comment
  CAS-BOT-BC83290  Myosurus minimus Herbert L. Mason 1952-4-14 14264 Contra Costa 3.5 miles south of Byron. Comment
  LA204363  Erysimum capitatum var. capitatum Herbert L. Mason; 1933-4-9 7189 Contra Costa E of Antioch along San Joaquin River 12 Comment
  POM256513  Phacelia breweri H. L. Mason 1938-5-3 11750 Contra Costa Trail between Juniper Camp and Deer Flat, Mount Diablo. Comment
  POM257244  Clarkia purpurea subsp. purpurea H. L. Mason 1928-4-26 4379 Contra Costa Around Berkeley and Oakland. Comment
  POM257264  Camissonia campestris subsp. campestris H. L. Mason 1929-3-31 5153 Contra Costa Along San Joaquin River, Antioch. Comment
  POM257268  Camissonia campestris subsp. campestris H. L. Mason 1931-4-5 5820 Contra Costa Antioch sandhills Comment
  POM257269  Camissonia micrantha H. L. Mason 1929-3-31 5160 Contra Costa Along San Joaquin River Comment
  POM269205  Ranunculus hebecarpus H. L. Mason 1929-3-29 5126 Contra Costa Marsh Creek Road, 2 miles above Clayton Comment
  POM289510  Ranunculus sceleratus H. L. Mason 1937-6-21 11547 Contra Costa 0.5 mile from the S end of Borden Hwy and 1.5 miles W of Byron. Comment
  POM311124  Limnanthes douglasii subsp. rosea Charles T. Mason Jr. 1949-3-17 1239 Contra Costa In a field along the Byron-Bethany road, 3.3 miles south of Byron. Comment
  POM312426  Myosurus sessilis H. L. Mason 1952-4-14 14263 Contra Costa 3.5 miles S of Byron. Comment
  POM312427  Myosurus sessilis H. L. Mason 1952-4-26 14269 Contra Costa Vernal Pool, 3.5 miles S of Byron Comment
  POM312428  Myosurus sessilis H. L. Mason 1952-4-26 14270 Contra Costa Vernal Pool, 3.5 miles S of Byron Comment
  POM313443  Ranunculus sceleratus H. L. Mason 1937-6-21 11547 Contra Costa 0.5 mile from the S end of Borden Hwy and 1.5 miles W of Byron. Comment
  RSA0008584  Erysimum capitatum var. angustatum H. L. Mason 1933-4-9 7189 Contra Costa East of Antioch along the San Joaquin River. 12 Comment
  RSA101693  Penstemon centranthifolius H. L. Mason 1929-3-31 5156 Contra Costa Along San Joaquin River, Antioch. Comment
  RSA114055  Downingia insignis H. L. Mason 1952-4-14 14267 Contra Costa 3.5 miles S of Byron Comment
  RSA114056  Psilocarphus brevissimus H. L. Mason 1952-4-14 14266 Contra Costa 3.5 miles S of Byron Comment
  RSA114063  Leptosiphon liniflorus H. L. Mason 1952-4-14 14265 Contra Costa 3.5 miles S of Byron Comment
  RSA114067  Lasthenia fremontii H. L. Mason 1952-4-14 14260 Contra Costa 3.5 miles S of Byron Comment
  RSA93107  Erigeron petrophilus var. petrophilus H. L. Mason 1923-11-12 853 Contra Costa Low rocky slopes of Mt. Diablo Comment
Read comments Feb 4 2013
  RSA93678  Filago gallica H. L. Mason 1928-4-26 4386 Contra Costa Berekeley-Oakland Hills Comment
  SEINET10840136  Githopsis specularioides Mason 1928-4-29 Mason 4429 Contra Costa Sycamore Canyon, south slope of Mount Diablo Comment
  SEINET196200  Navarretia mellita Herbert L. Mason 1945-6-12 Contra Costa Ridge SE fo Mount.Diablo near summit of road up Marsh Creek. Comment
  SEINET3696754 Image available Lotus denticulatus Herbert L. Mason 1945-5-31 Contra Costa Cashion Canyon, NW of St. Mary's College Comment
  SEINET7881864 Image available Baeria fremontii Herbert L. Mason 1952-1 14260 Contra Costa 3.5 miles south of Byron Comment
  SEINET8729347 Image available Linanthus liniflorus Herbert L. Mason 1952-1 14265 Contra Costa 3.5 miles south of Eyron Comment
  UC1076414  Symphoricarpos albus var. laevigatus Herbert L. Mason 1924-11-23 1158 Contra Costa Cashion Comment
  UC1093860  Ranunculus sceleratus Herbert L. Mason 1937-6-21 11547 Contra Costa 0.5 mi from south end of Borden Highway (about 1.5 mi w of Byron) Comment
  UC1099987  Zannichellia palustris Herbert L. Mason 1932-4-24 6965 Contra Costa Borden Hwy. near Marsh Creek Rd. Comment
  UC555403  Trifolium oliganthum H. L. Mason 1929-3-29 5131 Contra Costa 2 mi above Clayton (Marsh Creek Rd) Comment
  UC555573  Trifolium willdenovii H. L. Mason 1929-3-29 5132 Contra Costa 2 mi above Clayton (Marsh Creek Rd) Comment
  UC555621  Trifolium albopurpureum H. L. Mason 1929-3-29 5130 Contra Costa 2 mi above Clyton Rd (Marsh Creek Rd) Comment
  UC566798  Lomatium utriculatum H. L. Mason 1929-3-29 5138 Contra Costa above, Marsh Creek Road Clayton Comment
  UC570693  Solanum americanum H. L. Mason 1929-9-21 5445 Contra Costa 1 mi e of junction with road to Antioch (Bordon Highway); Bordon Highway Comment
  UC570734  Pogogyne serpylloides Herbert L. Mason 1924-5-13 1014 Contra Costa Ridge south of Claremont Canyon, Berkeley Hills Comment
  UC573064  Pectocarya penicillata H. L. Mason 5133 Contra Costa 2 mi above Clayton (Marsh Creek Rd) Comment
  UC634710  Clarkia purpurea subsp. quadrivulnera H. L. Mason 1928-4-26 4379 Contra Costa hills around Berkeley and Oakland Comment
  UC634972  Ranunculus hebecarpus H. L. Mason 1929-3-29 5126 Contra Costa two mi above Clayton (Marsh Creek Road) Comment
  UC635344  Delphinium patens H. L. Mason 1929-3-29 5136 Contra Costa Marsh Creek Rd 2 mi above Clayton Comment
  UC635677  Utricularia gibba H. L. Mason 1929-9-21 5441 Contra Costa 1 mi. n. from junction of Borden Hwy. and rd. to Antioch Comment
  UC635720  Dirca occidentalis H. L. Mason 1926-3-28 2800 Contra Costa Glory Hole Redwood Canyon Comment
  UC672242  Pentachaeta alsinoides Herbert L. Mason 1932-4-15 6925 Contra Costa summit road from Moraga to Lafayette Comment
  UC672425  Phacelia distans Herbert L. Mason 1929-3-15 5053 Contra Costa canyon back of Nortonville Comment
  UC691769  Deinandra kelloggii H. L. Mason 1929-3-29 5137 Contra Costa 2 mi above Clayton (Marsh Creek Road) Comment
  UC694157  Psilocarphus tenellus Herbert L. Mason 1932-4-15 6926 Contra Costa summit of Road Moraga to Lafayette Comment
Read comments Oct 6 2006
  UC908171  Navarretia mellita Herbert L. Mason 1945-6-12 12588 Contra Costa se of Mount Diablo (near summit of road up Marsh Creek) Comment
  UC912318  Laennecia coulteri Herbert L. Mason 1929-9-21 5443 Contra Costa one mile e of junction of Bordon Highway and road to Antioch; Antioch, Borden Highway Comment
  UC912542  Symphyotrichum subulatum Herbert L. Mason 1929-9-21 5439 Contra Costa 1 mi from junction of Borden Highway and road to Antioch Comment
  UC963765  Phlox gracilis Herbert L. Mason 1926-3-7 2703 Contra Costa via Walnut Creek to summit to Danville to Niles Canyon; Mt. Diablo Comment
  UCD102995  Lythrum californicum Herbert L. Mason 1955-7-14 14636 Contra Costa 1/2 mile E of Antioch Bridge. Comment
  UCD116680  Malva sylvestris Herbert L. Mason 1952-6-10 s.n. Contra Costa Waste land near Dwinelle Hall, University of California, Berkeley. Comment
  UCD136461  Dryopteris arguta Herbert L. Mason 1924-11-23 1166 Contra Costa Las Trampas Ridge. Comment
  UCD137006  Polypodium calirhiza Herbert L. Mason 1928-3-4 41696 Contra Costa Shell Ridge. Comment
  UCD137784  Pentagramma triangularis Herbert L. Mason 1924-11-23 1163 Contra Costa Las Trampas Ridge via Cashion. Comment
  UCD48584  Navarretia mellita H. L. Mason 1945-6-12 12588 Contra Costa Ridge south east of Mount Diablo near summit of road up Marsh Creek, Contra Costa County, California. Comment
  UCD96287  Myosurus sessilis H. L. Mason 1952-4-14 14264 Contra Costa 3.5 miles south of Byron. Comment
  UCD96288  Myosurus sessilis H. L. Mason 1952-4-26 14269 Contra Costa 3.5 miles south of Byron. Comment
  UCD96307  Myosurus minimus H. L. Mason 1952-4-14 14263 Contra Costa 3.5 miles south of Byron. Comment
  UCD97100  Ranunculus sceleratus H. L. Mason 1937-6-12 11547 Contra Costa 0.5 mile from the south end of Borden Highway and about 1.5 miles west of Byron. Comment



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