Search Results — 187 specimen records retrieved (149 records with coordinates)
Results for search: County=SAN JOAQUIN; Source=All; Collector=Mason;   

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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  CAS-BOT-BC114448  Cyperus eragrostis Herbert L. Mason; Verne Grant 1946-8-21 13056 San Joaquin Between Banta and Stockton Comment
  CAS-BOT-BC182335  Astragalus didymocarpus var. didymocarpus H. L. Mason 1932-3-19 6834 San Joaquin Two miles east of Midway, near Tracy Comment
  CAS-BOT-BC243639  Setaria pumila Herbert L. Mason; Verne Grant 1946-9-12 13127 San Joaquin Borden Highway near Dagget Road, Roberts Island Comment
  CAS-BOT-BC250991  Phragmites australis Herbert L. Mason 1946-9-12 13123 San Joaquin Borden Highway halfway between Old River - Middle River Comment
  CAS-BOT-BC310167  Hesperevax caulescens H. L. Mason 1939-4-16 12081 San Joaquin About 9 miles southeast of Stockton at junction of Austin Road and Little John Creek Comment
  CAS-BOT-BC310168  Hesperevax caulescens H. L. Mason 1939-4-16 12081 San Joaquin About 9 miles southeast of Stockton at junction of Austin Road and Little John Creek Comment
  CAS-BOT-BC31037  Bolboschoenus maritimus Herbert L. Mason 1948-5-31 13574 San Joaquin three miles north of Ripon. Comment
  CAS-BOT-BC34271  Carex comosa Herbert L. Mason 1928-9-30 4957 San Joaquin San Joaquin Delta near Holt. Comment
  CAS-BOT-BC400159  Ceratophyllum demersum H. L. Mason 1929-9-9 5421 San Joaquin Holt Comment
  CAS-BOT-BC400160  Ceratophyllum demersum H. L. Mason 1938-6-12 11851 San Joaquin Trapper Slough, Robert's Island, south-west of Holt Comment
  CAS-BOT-BC400161  Ceratophyllum demersum H. L. Mason 1938-6-12 11851 San Joaquin Trapper Slough, Robert's Island, south-west of Holt Comment
  CAS-BOT-BC419065  Persicaria lapathifolia Herbert L. Mason 1928-9-30 4970 San Joaquin San Joaquin Delta near Holt Comment
  CAS-BOT-BC451538  Elodea canadensis H. L. Mason 1939-6-9 12104 a San Joaquin About 9 miles southeast of Stockton at junction of Austin Road and Little John Creek Comment
  CAS-BOT-BC46944  Androsace elongata subsp. acuta H. L. Mason 1932-3-19 6820 San Joaquin two mi. e. of Midway. Midway is e. of Patterson Pass, and s. of Mountain House on Rt. 50. Comment
  CAS-BOT-BC54448  Erysimum capitatum H. L. Mason 1932-3-19 6820 San Joaquin Two miles east of Midway between Mountain House and Tracy. Comment
  CAS-BOT-BC54449  Erysimum capitatum H. L. Mason 1932-3-19 6820 San Joaquin Two miles east of Midway between Mountain House and Tracy. Comment
  CAS-BOT-BC83364  Myosurus minimus H. L. Mason 1930-4-1 5548 San Joaquin Ten miles east of Stockton. Comment
  HSC24640  Ceratophyllum demersum H. L. Mason 1938-6-12 11851 San Joaquin Trapper Slough, Robert's Island, SW of Holt Comment
  JEPS53554  Erysimum capitatum var. capitatum H. L. Mason 1932-3-20 San Joaquin plain 2 mi e Midway (e Alameda Co) Comment
Read comments
Oct 9 2006
  POM256417  Nemophila pedunculata H. L. Mason 1932-3-19 6824 San Joaquin 2 miles east of Midway, between Mountain House and Tracy. Comment
  POM257004  Hesperevax caulescens H. L. Mason 1939-4-16 s.n. San Joaquin 9 miles SE if Stockton at jct of Austin Road and Little John Creek Comment
  POM313128  Carex comosa H. L. Mason 1928-9-30 4957 San Joaquin San Joaquin Delta near Holt. Comment
  POM313148  Phragmites australis H. L. Mason, Verne Grant 1946-9-12 13123 San Joaquin Borden Highway halfway Old River- Middle River Comment
  SBBG26795  Hesperevax caulescens H. L. Mason 1939-4-16 12081 San Joaquin ca. 9 mi SE of Stockton at jct of Austin Rd and Little John Crk Comment
  SEINET5765431 Image available Egeria densa H. L. Mason 1938-1 12075 San Joaquin Trapper Slough, Roberts Island, SW of Holt Comment
  UC1028679  Ceratophyllum demersum Herbert L. Mason 1938-8-26 12076 San Joaquin Trappers Slough Roberts Island (Roberts Island); , Roberts Island Comment
  UC1039509  Galium trifidum H. L. Mason 1928-9-30 4959 San Joaquin near Holt; San Joaquin Delta Comment
  UC1039534  Dodecatheon clevelandii subsp. patulum Herbert L. Mason 1927-4-7 5201 San Joaquin 4 mi e Clements; e of Clements Comment
  UC1039794  Proboscidea lutea Herbert L. Mason 1929-9-9 5429 San Joaquin Holt; reclaimed delta lands Comment
  UC1039795  Proboscidea lutea Herbert L. Mason 1929-9-9 5429 San Joaquin Holt; reclaimed delta lands Comment
  UC1076488  Herniaria hirsuta subsp. cinerea Herbert L. Mason 1932-3-19 6825 San Joaquin 2 mi e Midway (between Mountain House and Tracy) Comment
  UC1076555  Chenopodium ambrosioides Herbert L. Mason 1928-9-30 4963 San Joaquin near Holt; San Joaquin delta Comment
  UC1083189  Lemna minuscula Herbert L. Mason 1937-6-21 11550 San Joaquin 1/2 mi sw of Holt Comment
  UC1093858  Allenrolfea occidentalis Herbert L. Mason 1928-9-20 4965 San Joaquin San Joaquin delta near Holt; San Joaquin delta Comment
  UC1093988  Marsilea vestita subsp. vestita Herbert L. Mason 1928-5-3 4443 San Joaquin 4 mi n Clements Comment
  UC1099802  Sparganium erectum subsp. stoloniferum Herbert L. Mason and Verne Grant 1946-9-12 13124 San Joaquin about 6 mi s Stockton (on Borden Highway) Comment
Read comments
Sep 25 2008
  UC1099854  Potamogeton illinoensis Herbert L. Mason, Verne Grant 1946-8-21 13069 San Joaquin sw of Holt; Trapper's Slough Comment
  UC1099870  Potamogeton foliosus Herbert L. Mason, Verne Grant 1946-8-21 13059 San Joaquin w of Stockton (on Borden Highway) Comment
  UC1099891  Potamogeton crispus Herbert L. Mason, S. Galen Smith 1948-8-5 8269 San Joaquin Trapper's Slough Robert's Island Comment
  UC1099894  Potamogeton crispus Herbert L. Mason, Verne Grant 1946-8-21 13068 San Joaquin sw of Holt; Trapper's Slough Comment
  UC1100010  Najas guadalupensis Herbert L. Mason, Verne Grant 1946-9-12 13128 San Joaquin near Dagget Road (Roberts Island, Borden Highway, s of main ditch); Roberts Island, Borden Highway Comment
  UC1100013  Najas guadalupensis Herbert L. Mason, Verne Grant 1946-8-21 13060 San Joaquin w of Stockton (on Borden Highway); Borden Highway Comment
  UC1100041  Potamogeton foliosus Herbert L. Mason, S. Galen Smith 1948-8-11 8319 San Joaquin Trapper's Slough; Robert's Island Comment
  UC1100127  Egeria densa Herbert L. Mason and Verne Grant 1946-8-21 13061 San Joaquin w of Stockton (on Borden Highway) Comment
  UC1100153  Damasonium californicum Herbert L. Mason 1928-5-3 4449 San Joaquin 0.4 mi. n. Clements Comment
  UC1100410  Phragmites australis Herbert L. Mason and Verne Grant 1946-9-12 13123 San Joaquin Borden Highway halfway between Old River-Middle River; halfway between Old River-Middle River Comment
  UC1100423  Carex comosa Herbert L. Mason 1928-9-30 4957 San Joaquin near Holt; San Joaquin Delta Comment
  UC1100460  Setaria pumila Herbert L. Mason 1946-9-12 13127 San Joaquin slough s. of main ditch, Borden Hwy., near Dagget Rd., Roberts Isl. Roberts Isl. Comment
  UC1100531  Cyperus eragrostis Herbert L. Mason and Verne Grant 1946-8-21 13056 San Joaquin between Banta and Stockton Comment
  UC1100915  Bolboschoenus maritimus subsp. paludosus Herbert L. Mason 1948-5-31 13574 San Joaquin three mi n Ripon; n of Ripon Comment
  UC1100981  Eichhornia crassipes Herbert L. Mason, Verne Grant 1946-8-21 13063 San Joaquin w of Stockton (on Borden Highway); Borden Highway Comment
  UC1101024  Juncus effusus subsp. pacificus Herbert L. Mason and Verne Grant 1946-8-21 13062 San Joaquin w of Stockton (on Borden Highway) Comment
  UC1101163  Polygonum lapathifolium Herbert L. Mason 1929-9-21 5440 San Joaquin Holt Alkaline Grasslands of San Joaquin Valley Comment
  UC1101164  Polygonum lapathifolium Herbert L. Mason 1928-9-30 4970 San Joaquin near Holt; Alkaline Grasslands of San Joaquin Valley, San Joaquin Del Comment
  UC1101177  Polygonum hydropiperoides Herbert L. Mason 1929-9-21 5442 San Joaquin Holt Alklaline Grasslands of San Joaquin Valley Comment
  UC1101178  Polygonum hydropiperoides Herbert L. Mason 1928-9-30 4971 San Joaquin near Holt; Alkaline Grasslands of San Joaquin Valley, San Joaquin Del Comment
  UC1101503  Myriophyllum spicatum Herbert L. Mason and S. Galen Smith 1948-8-5 8270 San Joaquin Robert's Isl., Trapper's Slough Comment
  UC1101553  Elatine brachysperma Herbert L. Mason 1930-4-1 5550 a San Joaquin 10 mi e Stockton Comment
  UC1106903  Potamogeton illinoensis Herbert L. Mason 1938-8-26 12073 San Joaquin Trappers Slough; Roberts Island Comment
  UC1111555  Utricularia macrorhiza Herbert L. Mason 1937-6-21 11549 San Joaquin 0.5 mi. s.w. Holt (Trapper Slough, Roberts Isl.); Roberts Isl., Trapper Slough Comment
  UC1178886  Myriophyllum hippuroides Herbert L. Mason 1938-8-26 12074 San Joaquin Trappers Slough, Roberts Island Comment
  UC1191165  Sidalcea hirsuta Herbert L. Mason 1928-5-3 4451 San Joaquin 4 mi n Clements; n of Clements Comment
  UC1191267  Polygonum punctatum Herbert L. Mason 1928-9-30 4969 San Joaquin near Holt; Alkaline Grasslands of San Joaquin Valley, San Joaquin Del Comment
  UC1191637  Calystegia sepium subsp. binghamiae Herbert L. Mason, Verne Grant 1946-8-21 13067 San Joaquin Holt Holt (in tules) Comment
  UC1192337  Polygonum amphibium var. emersum Herbert L. Mason 1928-9-30 4968 San Joaquin near Holt; San Joaquin Delta Comment
  UC1240175  Typha domingensis Herbert L. Mason 1948-6-29 13577 San Joaquin one mi n Tracy Comment
  UC1241759  Typha domingensis Herbert L. Mason 1948-6-29 13576 San Joaquin one mi n Tracy; San Joaquin Valley Comment
  UC1241767  Typha Herbert L. Mason 1948-5-31 13573 San Joaquin three mi n Ripon; n of Ripon Comment
  UC555422  Lotus wrangelianus Herbert L. Mason 1932-3-19 6821 San Joaquin 2 mi e Midway Comment
  UC555489  Trifolium albopurpureum var. dichotomum H. L. Mason 1932-3-19 6836 San Joaquin 2 mi e Midway Comment
  UC565490  Monolopia lanceolata H. L. Mason 1932-3-19 6827 San Joaquin 2 mi e Midway (between Mountain House and Tracy) Comment
  UC565492  Lasthenia glaberrima H. L. Mason 1932-4-24 6972 San Joaquin 11 mi s Clements Comment
  UC565548  Microseris douglasii subsp. douglasii H. L. Mason 1932-3-19 6832 San Joaquin 2 mi e Midway Comment
  UC566720  Lasthenia fremontii H. L. Mason 1928-5-3 4450 San Joaquin 4 mi n Clements Comment
  UC566854  Hydrocotyle ranunculoides H. L. Mason 1928-9-30 4958 San Joaquin San Joaquin Delta near Holt; San Joaquin Delta Comment
  UC570730  Pogogyne zizyphoroides Herbert L. Mason 1928-5-3 4448 San Joaquin 4 miles north of Clements Comment
  UC570740  Lycopus americanus H. L. Mason 1929-9-9 5423 San Joaquin Holt Comment
  UC570773  Callitriche longipedunculata H. L. Mason Apr 1930 5547 San Joaquin 10 miles east of Stockton Comment
  UC570780  Callitriche heterophylla var. bolanderi H. L. Mason 1929-4-7 5202 San Joaquin 4 mi e Clements Comment
  UC570781 Image available Callitriche hermaphroditica H. L. Mason 1928-5-3 4445 San Joaquin 4 mi n Clementes; ; San Joaquin Co. Comment
  UC571025  Pluchea odorata var. odorata H. L. Mason 1929-9-9 5419 San Joaquin Holt Comment
  UC573058  Plagiobothrys acanthocarpus H. L. Mason 1932-3-19 6828 San Joaquin 2 mi e Midway (Tracy highway) Comment
  UC573072  Pectocarya penicillata H. L. Mason 1932-3-19 6835 San Joaquin 2 mi e Midway (between Mountain House and Tracy) Comment
  UC573080  Amsinckia lycopsoides H. L. Mason 1932-3-19 6813 San Joaquin w of Tracy (road from Mountain House to Midway) Comment
  UC573081  Plagiobothrys infectivus H. L. Mason 1932-3-19 6829 San Joaquin Tracy Hwy 2 mi e Midway Comment
  UC573083  Amsinckia lycopsoides H. L. Mason 1932-3-19 6814 San Joaquin w of Tracy (road from Mountain House to Midway) Comment
  UC573136  Amsinckia tessellata var. gloriosa H. L. Mason 1932-3-19 6831 San Joaquin 2 mi e Midway Comment
  UC573137  Amsinckia lycopsoides H. L. Mason 1932-3-19 6816 San Joaquin w of Tracy (road from Mountain House to Midway) Comment
  UC573149  Plagiobothrys stipitatus var. micranthus Herbert L. Mason 1928-5-3 4454 San Joaquin 4 mi n Clements Comment
  UC592128  Nemophila pedunculata H. L. Mason 1932-3-19 6824 San Joaquin two mi e Midway (between Mountain House and Tracy); e of Midway, btw Mountain House and Tracy Comment
  UC592177  Sium suave H. L. Mason 1929-9-21 5444 San Joaquin Holt Comment
  UC629704  Egeria densa H. L. Mason 1938-8-26 12075 San Joaquin sw of Holt (Trapper Slough); Robert's Island Comment
  UC629711  Wolffiella lingulata H. L. Mason 1937-6-21 11548 San Joaquin 0.5 mi sw Holt, Roberts Island (Trappers Slough); Trappers Slough Comment
  UC629714  Ceratophyllum demersum H. L. Mason 1938-6-12 11851 San Joaquin sw Holt (Robert's Island, Trapper Slough); Trapper Slough, Robert's Island Comment
  UC629721  Hesperevax caulescens H. L. Mason 1939-4-16 12081 San Joaquin Junction of Austin Road and Little John Creek; Stockton Comment
  UC632738  Elodea canadensis H. L. Mason 1939-6-9 12104 A San Joaquin about 9 mi se Stockton (at junction of Austin Road and Little John Creek) Comment
  UC632739  Elodea canadensis H. L. Mason 1939-4-16 12080 San Joaquin about 9 mi se Stockton (at junction of Austin Road and Little John Creek); Burnham Quad. Comment
  UC632813  Hippuris vulgaris H. L. Mason 1938-8-26 12077 San Joaquin s.w. Holt (Trapper Slough, Roberts Isl.); Roberts Isl., Trapper Slough Comment
  UC634672  Ludwigia peploides subsp. peploides H. L. Mason 1928-9-30 4953 San Joaquin San Joaquin Delta near Holt; San Joaquin Delta Comment
  UC634959  Myosurus minimus H. L. Mason April 1930 5548 San Joaquin 10 mi e Stockton Comment
  UC635115  Phyla lanceolata H. L. Mason 1929-9-9 5428 San Joaquin San Joaquin River delta Holt; San Joaquin River delta Comment
  UC635117  Phyla lanceolata Herbert L. Mason 1928-9-30 4954 San Joaquin near Holt (San Joaquin River Delta); San Joaquin River Delta Comment
  UC635119  Verbena hastata Herbert L. Mason 1929-9-9 5425 San Joaquin near Holt Comment
  UC635134  Wolffiella lingulata H. L. Mason 1938-8-26 12072 San Joaquin Trappers Slough San Joaquin River, Roberts Island (Roberts Island, delta of the San Joaquin River) Comment
  UC635135  Wolffiella lingulata H. L. Mason 1937-6-21 11548 San Joaquin 0.5 mi sw Holt, Roberts Island (Trappers Slough); Trappers Slough Comment
  UC635136  Wolffiella lingulata H. L. Mason 1938-6-12 11850 San Joaquin 1 mi ne Middle River bridge, Roberts Island (Trappers Slough, delta of the San Joaquin River); San Joaquin River, Trappers Slough Comment
  UC635294  Astragalus gambelianus H. L. Mason 1932-3-19 6834 San Joaquin two mi e Midway (near Tracy); e of Midway, near Tracy Comment
  UC635510  Ceratophyllum demersum H. L. Mason 1928-9-30 4955 San Joaquin San Joaquin Delta near Holt; San Joaquin Delta Comment
  UC635511  Ceratophyllum demersum H. L. Mason 1929-9-9 5421 San Joaquin Holt Comment
  UC635634  Limnanthes alba subsp. alba H. L. Mason 1928-5-3 4456 San Joaquin 6 mi n Clement Comment
  UC635659  Downingia bicornuta var. picta H. L. Mason 1928-5-3 4447 San Joaquin 4 mi n Clements Comment
  UC635660  Downingia bicornuta var. picta H. L. Mason 1932-4-24 6973 San Joaquin 11 mi s Clements Comment
  UC635662  Downingia cuspidata H. L. Mason 1928-5-3 4446 San Joaquin 4 mi n Clements Comment
  UC635676  Utricularia macrorhiza Herbert L. Mason 1929-9-9 5422 San Joaquin Holt, lower San Joaquin R. Comment
  UC635679  Utricularia gibba Herbert L. Mason 1929-9-9 5420 San Joaquin marshes of Lower San Joaquin R. Lower San Joaquin R. Comment
  UC635689  Stachys albens H. L. Mason 1929-9-9 5427 San Joaquin Holt Comment
  UC635690  Heterocodon rariflorum H. L. Mason 1932-4-24 6974 San Joaquin 11 mi s Clements Comment
  UC635716  Androsace elongata subsp. acuta H. L. Mason 1932-3-19 6820 San Joaquin two mi e Midway Comment
  UC672312  Baccharis glutinosa H. L. Mason 1928-9-30 4964 San Joaquin near, San Joaquin Delta Holt; San Joaquin Delta Comment
  UC672412  Phacelia ciliata var. ciliata H. L. Mason 1932-3-19 6830 San Joaquin 2 mi e Midway Comment
  UC672468  Collinsia sparsiflora var. collina H. L. Mason 1929-4-7 5166 San Joaquin 10 mi e of Escalon Comment
  UC672495  Veronica peregrina subsp. xalapensis H. L. Mason 1929-4-7 5165 San Joaquin 10 mi e of Escalon Comment
  UC672545  Gratiola ebracteata H. L. Mason 1928-5-3 4453 San Joaquin four mi n Clement Comment
  UC672598  Frankenia salina H. L. Mason 1928-9-30 4967 San Joaquin near Holt; San Joaquin Delta Comment
  UC673356  Dodecatheon clevelandii subsp. patulum H. L. Mason 1927-4-7 5201 San Joaquin 4 mi e Clements; e of Clements Comment
  UC673370  Mentzelia pectinata Herbert L. Mason 1932-3-19 6823 San Joaquin 2 m e of Midway (between Mountain House and Tracy.) Comment
Read comments
Apr 26 2018
  UC673389  Samolus parviflorus Herbert L. Mason 1929-9-9 5424 San Joaquin Holt Comment
  UC673441  Castilleja exserta H. L. Mason 1932-3-19 6822 San Joaquin 2 mi e Midway (between Mountain House and Tracy) Comment
  UC673521  Erysimum capitatum Herbert L. Mason 1932-3-19 6826 San Joaquin two mi e Midway Comment
  UC694151  Psilocarphus brevissimus var. brevissimus H. L. Mason 1932-4-24 6968 San Joaquin 11 mi s Clements Comment
  UC694158  Psilocarphus brevissimus var. brevissimus H. L. Mason 1932-4-24 6967 San Joaquin 11 mi s Clements Comment
  UC698537  Cyperus eragrostis H. L. Mason 1928-9-30 4962 San Joaquin San Joaquin Delta near Holt; San Joaquin Delta Comment
  UC702408  Wolffiella lingulata Herbert L. Mason 1945-10-10 San Joaquin Trappers Slough San Joaquin River, Roberts Island (Roberts Island, delta of the San Joaquin River) Comment
  UC907995  Linanthus liniflorus Herbert L. Mason 1928-5-3 4458 San Joaquin 6 mi n Clements Comment
  UC912221  Bidens frondosa Herbert L. Mason 1928-9-30 4956 San Joaquin near Holt (San Joaquin Delta); San Joaquin Delta Comment
  UC912246  Eclipta prostrata Herbert L. Mason 1928-9-30 4966 San Joaquin near Holt; San Joaquin Delta Comment
  UC912410  Bidens laevis Herbert L. Mason 1929-9-9 5426 San Joaquin Holt Comment
  UC912579  Leersia oryzoides Herbert L. Mason 1928-9-30 4961 San Joaquin San Joaquin Delta near Holt; San Joaquin Delta Comment
  UC912580  Deschampsia danthonioides Herbert L. Mason 1928-5-3 4444 San Joaquin 4 mi. n. Clememts Comment
  UC935735  Sagittaria montevidensis subsp. calycina Herbert L. Mason and Verne Grant 1946-9-12 13126 San Joaquin Roberts Island; Borden Highway near Dagget Road Comment
  UC935751  Sagittaria montevidensis subsp. calycina Herbert L. Mason and Verne Grant 1946-8-21 13057 San Joaquin between Banta and Stockton Comment
  UC935759  Sagittaria latifolia Herbert L. Mason 1928-9-30 4960 San Joaquin San Joaquin Delta near Holt; San Joaquin Delta near Holt Comment
  UC936135  Wolffiella lingulata Herbert L. Mason 1945-10-10 San Joaquin Trappers Slough San Joaquin River, Roberts Island (Roberts Island, delta of the San Joaquin River) Comment
  UC936194  Alopecurus saccatus H. L. Mason 1932-4-24 6969 San Joaquin 11 mi. s. Clements Comment
  UC963752  Navarretia leucocephala subsp. leucocephala H. L. Mason 1928-5-3 4455 San Joaquin 4 mi n Clements Comment
  UC971821  Limnanthes douglasii subsp. rosea Charles T. Mason Jr. 1948-4-24 1145 San Joaquin 7 mi ne Clements (along State Hwy 88) 91 Comment
  UC971826  Limnanthes douglasii subsp. rosea Charles T. Mason Jr. 1949-3-29 1243 San Joaquin along state hwy 88 8 mi ne Clements Comment
  UC971831  Limnanthes alba subsp. alba Charles T. Mason Jr. 1948-4-24 1143 San Joaquin 3 mi n Mokelumne River Bridge (on State Hwy 88) 60 Comment
  UC971872  Limnanthes douglasii Charles T. Mason Jr. 1948-4-24 1140 San Joaquin about 10 mi ne Stockton (ditch on nw side of Hwy 88) Comment
  CAS-BOT-BC190897  Calystegia sepium subsp. limnophila Herbert L. Mason; Verne Grant 1946-8-21 13067 San Joaquin Near Holt Comment
  CAS-BOT-BC403911  Cannabis sativa Herbert L. Mason; Verne Grant 1946-8-21 13058 San Joaquin West of Stockton on Borden Highway Comment
  CAS-BOT-BC445825  Egeria densa H. L. Mason 1938-8-26 12075 San Joaquin Trapper Slough, Robert's Island, southwest of Holt Comment
  CAS-BOT-BC451501  Egeria densa H. L. Mason 1938-8-26 12075 San Joaquin Trapper Slough, Robert's Island, southwest of Holt Comment
  CAS-BOT-BC452127  Potamogeton crispus Herbert L. Mason; S. Galen Smith 1948-8-5 8269 San Joaquin Trapper's Slough, Robert's Island Comment
  CAS-BOT-BC534976  Wolffiella lingulata H. L. Mason 1945-10-10 s. n. San Joaquin Trapper Slough, Roberts Island, delta of San Joaquin River Comment
  CAS-BOT-BC535199  Wolffiella lingulata Herbert L. Mason 1945-10-10 s. n. San Joaquin Trapper Slough, Roberts Island, delta of the San Joaquin River Comment
  CAS-BOT-BC535200  Wolffiella lingulata Herbert L. Mason 1937-6-21 11548 San Joaquin Trapper Slough, 1/2 mile southwest of Holt, Robert Island Comment
  CAS-BOT-BC535225  Wolffiella lingulata H. L. Mason 1937-6-21 11548 San Joaquin Trapper Slough, 1/2 mile southwest of Holt, Roberts Island Comment
  POM257010  Ceratophyllum demersum H. L. Mason 1938-6-12 11851 San Joaquin Trapper Slough, Robert's Island, SW of Holt. Comment
  POM257227  Wolffiella lingulata H. L. Mason 1937-6-21 11548 San Joaquin Trapper Slough, 0.5 mile southwest of Holt, Roberts Island Comment
  POM257232  Egeria densa H. L. Mason 1938-8-26 12075 San Joaquin Trapper Slough, Robert s Island, southwest of Holt. Comment
  POM257274  Ludwigia peploides subsp. peploides H. L. Mason 1928-9-30 4953 San Joaquin San Joaquin Delta near Holt. Comment
  POM312826  Juncus effusus subsp. pacificus H. L. Mason, Verne Grant 1946-8-21 13071 San Joaquin Middle River bridge, Victoria Island. Comment
  POM312838  Eichhornia crassipes H. L. Mason, Verne Grant 1946-8-21 13063 San Joaquin West of Stockton on Borden Hwy; Marsh Plant Survey. Comment
  POM312901  Cannabis sativa H. L. Mason, Verne Grant 1946-8-21 13058 San Joaquin West of Stockton on Borden Hwy; Marsh Plant Survey. Comment
  POM312904  Polygonum coccineum H. L. Mason 1928-9-30 4968 San Joaquin San Joaquin Delta near Holt. Comment
  POM312910  Polygonum hydropiperoides H. L. Mason 1928-9-30 4971 San Joaquin San Joaquin Delta near Holt. Comment
  POM313020  Potamogeton crispus H. L. Mason, Verne Grant 1946-8-21 13068 San Joaquin Trapper s Slough, SW of Holt, San Joaquin County Comment
  POM313088  Schoenoplectus acutus var. occidentalis H. L. Mason, Verne Grant 1946-8-21 13070 San Joaquin Middle River bridge, Victoria Island. Comment
  RSA312538  Polygonum punctatum H. L. Mason 1928-9-30 4969 San Joaquin San Joaquin Delta near Holt. Comment
  RSA366704  Egeria densa H. L. Mason 1938-8-26 12075 San Joaquin Trapper Slough, Robert s Island, southwest of Holt. Comment
  SBBG45002  Egeria densa H. L. Mason 1938-8-26 12075 San Joaquin Trapper Slough, Robert's Island, SW of Holt Comment
  SEINET10501601  Egeria densa Herbert L. Mason 1938-8-26 Mason 12075 San Joaquin Trapper Slough, Robert's Island, SW of Holt. Comment
  SEINET10939141  Heterocodon rariflorum Mason Mason 6974 San Joaquin CLEMENTS Comment
  SEINET10939142  Heterocodon rariflorum Mason Mason 5551 San Joaquin KNIGHT'S FERRY Comment
  SEINET6670595  Limnanthes douglasii subsp. rosea C. T. Mason 1948-4-25 1160 San Joaquin Along state highway 4 about 1.8 mile west of cross-road to Milton and Knights Ferry 61 Comment
  SEINET6670606  Limnanthes douglasii subsp. rosea C. T. Mason 1948-4-24 1145 San Joaquin 7 miles northeast of Clements along State Highway 88 91 Comment
  SEINET8727025 Image available Limnanthes douglasii Charles T. Mason Jr. 1948-1 1160 San Joaquin Along state Highway 4 about 1/8 mile west of cross-road to Milton and Knights Ferry, Elevation 200 feet. 61 Comment
  UC1192294  Cannabis sativa Herbert L. Mason, Verne Grant 1946-8-21 13058 San Joaquin w of Stockton (on Borden Highway) Comment
  UC634760  Brodiaea nana Herbert L. Mason 1928-5-3 4452 San Joaquin 4 mi N of Clements, vernal pools Comment
  UCD110444  Elatine brachysperma Herbert L. Mason 1930-4-1 5550 a San Joaquin Ten miles east of Stockton. Comment
  UCD138273  Potamogeton illinoensis Herbert L. Mason; Verne Grant 1946-8-21 13069 San Joaquin Trapper's Slough, southwest of Holt. Comment
  UCD139988  Eichhornia crassipes Herbert L. Mason; Verne Grant 1946-8-21 13063 San Joaquin west of Stockton on Borden Highway. Comment
  UCD140032  Bolboschoenus maritimus subsp. paludosus Herbert L. Mason 1948-5-31 13574 San Joaquin 3 miles north of Ripon. Comment
  UCD141079  Cyperus eragrostis Herbert L. Mason; Verne Grant 1946-8-21 13056 San Joaquin between Banta and Stockton. Comment
  UCD98167  Herniaria hirsuta var. cinerea Herbert L. Mason 1932-3-19 6825 San Joaquin 2 miles east of Midway, between Mountain House and Tracy. Comment
  UCD99494  Persicaria lapathifolia Herbert L. Mason 1928-9-30 4970 San Joaquin San Joaquin Delta near Holt. Comment



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