Search Results — 2000 specimen records retrieved (1534 records with coordinates)
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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
  UC912612  Abronia maritima H. L. Mason 1927-11-27 4140 Santa Barbara Along ocean bluff Carpinteria Comment
  UC912624  Abronia pogonantha Herbert L. Mason 1932-4-3 6916 Fresno 2 mi s Coalinga Comment
  UC672171  Acamptopappus sphaerocephalus var. hirtellus H. L. Mason 1926-4-26 3001 Los Angeles Little Rock Comment
  UC964730  Acanthomintha lanceolata Herbert L. Mason 1940-5-5 12284 San Benito 6 mi se of Pacines (and 2.4 mi e of Emmet School, Panoche Pass); Inner South Coast Ranges, San Carlos Range, Panoche Pass 609 Comment
  UC1179053  Acer circinatum Herbert L. Mason 1947-7-8 13284 Shasta on Highway #299 just e Hatchet Creek Summit; just e of Hatchet Creek Summit 1219 Comment
  UC635162  Acer glabrum var. glabrum H. L. Mason 1933-9-2 7260 Amador Silver Lake Sierra Nevada Mountains, Silver Lake Comment
  UC635158  Acer negundo var. arizonicum H. L. Mason 1928-10-2 4972 Monterey one mi below Salinas; Salinas River, below Salinas Comment
  UCD128336  Achillea millefolium Steve Mason; Pam Rector 1993-4-16 4 Orange Laguna Niguel, Sea View Park Trail, about 25 yards up trail on left side, on border between disturbed terrain and coastal sage scrub. Near housing development overlooking canyon and coastline. 182 Comment
  UC912570  Achyrachaena mollis Herbert L. Mason 1929-3-24 5105 Madera 18 mi e at jct with Yosemite Road Madera Comment
  UC912589  Achyrachaena mollis Herbert L. Mason 1926-4-10 2802 Alameda Cedar Mountain (via Arroyo Mocho Canyon); Arroyo Mocho Canyon, Cedar Mountain Comment
  UCD97895  Achyronychia cooperi Herbert L. Mason 1928-3-10 4177 Riverside Whitewater River. Comment
  UCD104072  Acmispon brachycarpus Herbert L. Mason 1940-5-3 12253 Merced Ortigalita Canyon, two miles northeast of Ortigalita Peak, South Coast Ranges. 304 Comment
  UCSB34887  Acmispon grandiflorus Mason, Renee 1980-3-25 Santa Barbara East end of Santa Cruz Island, 11 km. east of Research Station 243 Comment
  UC635109  Aconitum columbianum H. L. Mason 1922-7-25 329 Tuolumne Yosemite Nat'l Park, Porcupine Flat Sierra Nevada Mts., Yosemite Nat'l Park, Porcupine Flat 2133 Comment
  UCD98584  Aconogonon davisiae Herbert L. Mason 1940-7-30 12353 Alpine Sierra Nevada, north of Carson Pass. 2682 Comment
  UC571024  Acourtia microcephala Herbert L. Mason 1923-6-17 471 Ventura bluffs along coast Ventura Comment
  UCD128510  Acroptilon repens Herbert L. Mason 1942-7-8 12553 Stanislaus two miles east of Newman, at junction of Patterson-Stevinson roads. Comment
  UC1093917  Actaea rubra Herbert L. Mason 1936-7-9 11174 Mariposa s. White wolf (e. slope of hill forming boundary between Tuolumne & Mariposa Co.'s); Sierra Nevada, Yosemite Nat'l Park 2590 Comment
  POM270462  Actaea rubra subsp. arguta H. L. Mason 1927-7-31 4007 Santa Cruz Mt. Herman, Santa Cruz Mts. Comment
  UCD137209  Adiantum jordanii Herbert L. Mason 1925-3-7 1278 Alameda 0.5 mile southwest of Sunol. Comment
  UC1081560  Ageratina occidentalis Herbert L. Mason 1936-8-1 11487 Mono Leevining Canyon, Yosemite National Park, Sierra Nevada Sierra Nevada, Yosemite National Park, Leevining Canyon Comment
  CAS-BOT-BC295574  Agnorhiza elata H. L. Mason 1938-7-16 11952 Madera Four miles south of Miami Ranger Station 1219 Comment
  UC635176  Agoseris heterophylla var. cryptopleura H. L. Mason 1928-5-4 4503 El Dorado 4 mi n of Shingle Springs; Green Valley Comment
  UC565512  Agoseris heterophylla var. heterophylla H. L. Mason 1932-4-24 6980 Amador 3 mi s Ione Comment
Read comments
Oct 9 2006
  UC1275789  Agrostis Herbert L. Mason 1963-6-24 15216 Mono Paoha Island Mono Lake Comment
  UC110011  Agrostis alba Herbert L. Mason 1948-9-4 13653 Mono Rush Creek Mono Lake Comment
  UC1195920  Agrostis alba Herbert L. Mason 1958-8-9 14893 Tuolumne w Hetch Hetchy Dam; Sierra Nevada, Yosemite National Park, Swamp Lake area 1584 Comment
  UC1110539  Agrostis exarata Herbert L. Mason 1939-8-3 12206 Placer 7 mi nw Tahoe City (Squaw Valley); Squaw Valley 1889 Comment
  UC1111014  Agrostis idahoensis Herbert L. Mason 1938-7-10 11909 Tuolumne South Island Swamp Lake (w of Hetch Hetchy Dam, Yosemite National Park); Sierra Nevada, Yosemite National Park, , Hetch Het 1584 Comment
  UC965490  Agrostis idahoensis Herbert L. Mason 1952-8-16 14486 b Nevada meadow opposite University of California, Trout Laboratory; Sierra Nevada, Sage Hen Creek 1981 Comment
  UCD53002  Agrostis oregonensis H. L. Mason 1939-7-28 11971 Tuolumne Vernon Lake Trail, north and east of Hetch-Hetchy, Yosemite National Park. Comment
  UC1100123  Agrostis scabra Herbert L. Mason 1948-9-5 13678 Mono island in Mono Lake Mono Lake Comment
  UCD53396  Agrostis scabra H. L. Mason 1938-7-25 12010 Tuolumne Deep Lake, east base of Mahan Peak, Yosemite National Park. Comment
  CAS-BOT-BC138241  Aira caryophyllea var. caryophyllea H. L. Mason 1921-5-29 s.n. San Mateo Roadside near Arroyo de los Frijoles. Comment
  UC1100221  Aira praecox Herbert L. Mason 1946-5-18 12764 Mendocino pygmy forest e Fort Bragg Comment
  UC1102960  Alisma Herbert L. Mason 1958-8-9 14877 Tuolumne w Hetch Hetchy Dam; Sierra Nevada, Yosemite National Park, Swamp Lake 1584 Comment
  CAS-BOT-BC238449  Alisma gramineum Herbert L. Mason 1955-8-13 14653 C Modoc South end of Goose Lake. Comment
  UC985666  Alisma gramineum Herbert L. Mason 1947-8-15 13557 Modoc spring feeding into w side Goose Lake (11 mi from Davis Creek) Comment
  UCD137903  Alisma gramineum Herbert L. Mason 1955-8-13 14653 A Modoc southwest side of Goose Lake. Comment
  POM313035  Alisma triviale H. L. Mason 1955-8-13 14653 C Modoc S end of Goose Lake. Comment
  UC635255  Allium burlewii Herbert L. Mason 1927-6-15 3770 San Bernardino on summit of ridges about Mt. Baldy San Gabriel Mts., Baldy 2438 Comment
  UC635258  Allium campanulatum H. L. Mason 1923-7-20 619 Tuolumne near Carl Inn (Ackerson Meadows); Sierra Nevada Mountains, Yosemite National Park Comment
  UC635262  Allium campanulatum H. L. Mason 1926-5-29 3296 Nevada 3 mi w Cisco 1767 Comment
  UC635259  Allium dichlamydeum H. L. Mason 1928-4-25 4378 San Francisco Hunter's Point Comment
  POM196557  Allium peninsulare var. franciscanum H. L. Mason 1921-5-13 s.n. San Mateo Jasper Ridge near Sand Hill Caves 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
  UC1199838  Allium tribracteatum Herbert L. Mason 1938-7-25 12026 Tuolumne Bailey Ridge Sierra Nevada, Yosemite National Park, Bailey Ridge 2834 Comment
  UC908934  Allophyllum divaricatum Herbert L. Mason 1926-5-31 3361 Calaveras 1 1/2 mi. w. Calaveras Grove Comment
  UC908937  Allophyllum divaricatum Herbert L. Mason 1934-5-5 8114 Lake e. side Mt. Konocti Comment
  UC907888  Allophyllum gilioides subsp. gilioides Herbert L. Mason 1949-4-23 14003 Kern below Breckenridge Mt. rd. Kern Canyon Comment
  UC908429  Allophyllum gilioides subsp. gilioides Herbert L. Mason 1938-5-8 11806 Santa Barbara vicinity of summit Figueroa Mt. Comment
  UC908478  Allophyllum gilioides subsp. gilioides Herbert L. Mason 1928-1 4427 Contra Costa s. slope Mt. Diablo (Sycamore Canyon); , Sycamore Canyon Comment
  UC909018  Allophyllum gilioides subsp. violaceum Herbert L. Mason 1941-7-16 12487 El Dorado Lake Tahoe, Cold Creek Comment
  UCR111260  Allophyllum gilioides subsp. violaceum H. L. Mason 1941-7-16 12487 El Dorado Sierra Nevada Mtns., Cold Creek, south of Lake Tahoe. 1912 Comment
  UC908792  Allophyllum glutinosum Herbert L. Mason 1926-4-30 3131 Riverside 2 mi. s. Temecula Comment
  UC665616  Allophyllum integrifolium Herbert L. Mason 1941-7-12 12479 Tuolumne w. Hetch Hetchy Valley (Miguel Meadow); Sierra Nevada, Yosemite Nat'l Park, Miguel Meadow Comment
  UC908479  Allophyllum integrifolium Herbert L. Mason 1941-7-10 12483 Tuolumne e. North Mt. (near w. border of Yosemite Nat'l Park); Yosemite Nat'l Park Comment
  SBBG64464  Allophyllum violaceum H. L. Mason 1941-7-16 12487 El Dorado Cold Crk, S of Lake Tahoe 2286 Comment
  UC1076204  Alnus incana subsp. tenuifolia Herbert L. Mason 1926-5-30 3325 a Alpine on road to Kit Carson Pass 1889 Comment
  UC1093925  Alnus incana subsp. tenuifolia Herbert L. Mason 1929-10-4 5461 Placer on Hwy 40 1 mi n Cisco Comment
  UC629713  Alnus incana subsp. tenuifolia Herbert L. Mason 1939-7-18 12172 El Dorado 1 mi w Grass Lake Meadow (n side of pass); Luther Pass 2346 Comment
  UC1076356  Alnus rhombifolia H. L. Mason 1930-10-25 5758 Monterey Headwaters of the Arroyo Seco Santa Lucia Mts. Comment
  UC1083216  Alnus rhombifolia Herbert L. Mason and L. W. Reinecke 1937-7-22 11596 Tuolumne s Miguel Meadows (in hills just w of Hetch Hetchy); Sierra Nevada, Yosemite National Park, Swamp Lake 1584 Comment
  UC1212040  Alopecurus aequalis Herbert L. Mason 1939-8-2 12196 El Dorado s. end of Lake Tahoe (near mouth of Upper Truckee R.) 1920 Comment
  SEINET200137  Amaranthus californicus H. L. Mason, V. Grant 1947-7-10 13326 Modoc Dorris Reservoir 2 miles east of Alturas Comment
  POM312355  Amaranthus californicus H. L. Mason 1945-8-24 12676 Lake East shore, Lower Lake. Comment
  UC962126  Amaranthus deflexus Herbert L. Mason 1927-6-20 3792 Alameda Berkeley Comment
  UC912212  Ambrosia chamissonis Herbert L. Mason 1927-10-4 4119 Santa Cruz mouth of Waddell Creek; Ano Nuevo Point Comment
  UC555442  Amelanchier utahensis H. L. Mason 1930-10-25 5743 Monterey Headwaters of Arroyo Seco; Santa Lucia Mts. Comment
  UC635148  Ammannia robusta H. L. Mason August, 1930 5712 Lake Clear Lake Comment
  UC555400  Amorpha californica var. californica H. L. Mason 1923-6-18 510 Ventura Red Reef Canyon Comment
  GH424612  Amsinckia douglasiana H. L. Mason 1932-3-19 6815 Unknown Road from Mountain House to Midway, west of Tracy Comment
  UC573083  Amsinckia lycopsoides H. L. Mason 1932-3-19 6814 San Joaquin w of Tracy (road from Mountain House to Midway) Comment
  UC573130  Amsinckia tessellata var. tessellata H. L. Mason 1932-4-2 6901 Kern 3 mi w Muroc; Mojave Desert Comment
  UCD128846  Anaphalis margaritacea Herbert L. Mason 7-8 Jul 1939 12152 Nevada 3 miles west of Donner Summit. 2072 Comment
  UC581123  Ancistrocarphus filagineus H. L. Mason 1934-4-28 8093 Sonoma Jenson's Ranch; Dohrmann Creek Comment
  UC581152  Ancistrocarphus filagineus H. L. Mason 1935-3-27 8173 Fresno w of Fresno Comment
  UC581173  Ancistrocarphus filagineus H. L. Mason 1935-3-30 8257 San Luis Obispo Cholame Valley Comment
  UC632853  Ancistrocarphus filagineus H. L. Mason 1936-4-26 11096 Lake Bartlett Springs Comment
  UC673624  Ancistrocarphus filagineus H. L. Mason 1933-4-30 7230 Lake near Aetna Springs Comment
  UC581121  Androsace elongata subsp. acuta H. L. Mason 1934-3-28 8002 Kern n facing slopes Kern River Canyon; n facing slopes Kern River Canyon Comment
  UC635716  Androsace elongata subsp. acuta H. L. Mason 1932-3-19 6820 San Joaquin two mi e Midway Comment
  UC964762  Androsace elongata subsp. acuta Herbert L. Mason 1938-4-16 11729 Kern Isabella Comment
  CAS-BOT-BC391766  Anemone deltoidea H. L. Mason 1929-5-9 5280 Mendocino Bull Creek Flat Comment
  UC635126  Anisocoma acaulis H. L. Mason 1932-4-2 6897 Kern 3 mi w Muroc; Mohave Desert Comment
  UC912217  Antennaria argentea Herbert L. Mason 1925-6-27 2118 Tuolumne near, (at Hog Ranch) Mather Comment
  UC712400  Antennaria media H. L. Mason 1936-7-23 11273 Tuolumne alpine slopes of Mount conness; Sierra Nevada 3505 Comment
  CAS-BOT-BC77253  Antennaria microphylla H. L. Mason 1939-7-8 12162 El Dorado Northeast end of Fallen Leaf Lake 1950 Comment
  SEINET10920153  Antennaria rosea Herbert L. Mason 1939-7-8 Mason 12162 El Dorado Open pine forest, northeast end of Fallen Leaf Lake. 1951 Comment
  UCD56149  Anthoxanthum aristatum Herbert L. Mason 1946-5-18 12766 Mendocino east of Mendocino City. Comment
  UC566814  Anthriscus caucalis Herbert L. Mason 1926-6-6 3379 Santa Cruz Felton Comment
  UC672557  Antirrhinum coulterianum Herbert L. Mason 1926-5-2 3194 Riverside Aguanga Valley Comment
  UC672565  Antirrhinum nuttallianum subsp. nuttallianum Herbert L. Mason 1926-5-2 3203 Riverside Temecula Valley Comment
  UC1178981  Antirrhinum vexillocalyculatum subsp. vexillocalyculatum Herbert L. Mason 1946-5-30 12811 Lake e of Indian Valley (North Fork of Cache Creek); North Fork of Cache Creek 548 Comment
  UC623308  Apocynum androsaemifolium H. L. Mason 1939-5-18 12103 Napa near summit of Wooden Valley Grade Comment
  UC623309  Apocynum androsaemifolium H. L. Mason 1939-5-18 12104 Napa Wooden Valley Comment
  UC1076224  Apocynum cannabinum Herbert L. Mason 1942-7-15 12555 Solano 4.5 mi. n.w. of Vacaville; Bucktown Ranch Comment
  UC581107  Aquilegia eximia H. L. Mason 1934-9-9 8150 Monterey Santa Lucia Ranger Station Santa Lucia Mountains Comment
  POM270508  Aquilegia pubescens H. L. Mason 1923-7-31 678 Tuolumne Dana Fork, Sierra Nevada Mtns Comment
  UC635108  Aquilegia pubescens H. L. Mason 1923-7-31 678 Tuolumne Dana Fork Sierra Nevada Mtns Comment
  GH378696  Arabis blepharophylla H. L. Mason 1925-3-1 1271 Unknown San Francisco, Bernal heights Comment
  UC565469  Arabis blepharophylla H. L. Mason 1927-4-26 5216 Marin w of Alpine Lake (on road from Fairfax to crest of Bolinas Ridge); Bolinas Ridge Comment
  UC635267  Aralia californica H. L. Mason August, 1930 5735 Mendocino rd. from Willits to Fort Bragg Comment
  UC1076328  Arceuthobium americanum Herbert L. Mason 1924-6-20 1079 Plumas near lake Gold Lake Comment
  UC1039599  Arceuthobium campylopodum Herbert L. Mason 1929-12-1 5515 Monterey Huckleberry Hill Carmel Comment
  UC1076320  Arceuthobium campylopodum Herbert L. Mason 1926-6-1 2590 Lake Upper Lake to Elk Mtn Comment
  UC1076323  Arceuthobium campylopodum H. L. Mason 1932-8-27 7168 Mendocino Point Arena Comment
  UC1076327  Arceuthobium campylopodum Herbert L. Mason 1924-6-26 1101 Tuolumne Ridge n of Middle Fork near Mather Sierra Nevada, Yosemite National Park Comment
  UC571189  Arctostaphylos andersonii Herbert L. Mason 1929-12-1 5514 a Santa Cruz between Davenport and Felton; Empire grade Comment
  UC571088  Arctostaphylos canescens subsp. canescens H. L. Mason 1926-3-14 2735 Napa Toll House Canyon Mount St. Helena Comment
  UC571089  Arctostaphylos canescens subsp. canescens H. L. Mason 1926-2-28 2670 Marin West Peak Mt. Tamalpais Comment
  JEPS19873  Arctostaphylos densiflora H. L. Mason 1931-3-8 Sonoma w Santa Rosa; Vine Hill School Comment
  GH350477  Arctostaphylos hookeri H. L. Mason 1923-6-23 570 Unknown Del Monte Comment
  GH350713  Arctostaphylos myrtifolia H. L. Mason 1928-5-3 4468 Unknown One mile south of Ione Comment
  RSA381124  Arctostaphylos myrtifolia George Mason, John M. Tucker, Roman Gankin, C. T. Mason 1956-10-27 194 Calaveras 1/2 mi. N of Mokolumne River behind high cliffs. Located right across the river from Comanche in Calaveras Co. Comment
Read comments
Jan 10 2014
  CAS-BOT-BC45549  Arctostaphylos nevadensis George Mason; Roman Gankin 1958-5-25 s.n. El Dorado On either side of gravel road leading down to a bog at eastern foot of Meyer's grade, 50 yards n. of U.S. Highway 50. Comment
  UC571212  Arctostaphylos nevadensis H. L. Mason 1926-5-30 3318 El Dorado ridge between Emerald Bay and Cascade Lake Comment
  RSA64472  Arctostaphylos nissenana H. L. Mason 1945-02 s.n. El Dorado Placerville Comment
Read comments
Jun 22 2012
  UC571222  Arctostaphylos nummularia H. L. Mason 1925-2-1 1219 Marin Mount Tamalpais Comment
  UC634746  Arctostaphylos nummularia Herbert L. Mason 1927-7-31 3997 Santa Cruz hills s Mt. Herman Comment
  UC571085  Arctostaphylos pumila H. L. Mason 1923-6-23 570 Monterey Del Monte Comment
  UC571220  Arctostaphylos pungens H. L. Mason 1930-10-25 5764 Monterey hills six mi e Santa Lucia Ranger Stations Comment
  UC571217  Arctostaphylos purissima H. L. Mason 1923-6-15 416 a Santa Barbara Harris Grade Comment
  UC571224  Arctostaphylos stanfordiana H. L. Mason 1925-1-22 1202 Napa Wooden Valley Grade Comment
  UC571074  Arctostaphylos tomentosa subsp. bracteosa H. L. Mason 1931-11-1 5883 Monterey road between Monterey and Carmel Comment
  UC571227  Arctostaphylos tomentosa subsp. bracteosa H. L. Mason 1923-6-23 562 Monterey Del Monte Comment
  GH245841  Arctostaphylos virgata H. L. Mason 1926-2-21 2650 Unknown Near the summit of road from Inverness to Point Reyes Light Comment
  GH362400  Arctostaphylos viscida H. L. Mason 1928-5-3 4466 Unknown one mile south of Ione Comment
  SEINET11988273  Arctostaphylos viscida G. Mason, Tucker, J. M.; Gankin, R. 1956-1 193 Calaveras 0.5 mi N of Mokalomne River behind high cliffs, right across river from Comanche Comment
  UC571236  Arctostaphylos viscida subsp. viscida H. L. Mason 1926-5-28 3264 Placer hills near Auburn Comment
  UC1076490  Arenaria macradenia var. macradenia Herbert L. Mason 1926-4-26 2977 Los Angeles Summit of Mint Canyon Comment
  UCD95185  Argemone munita Steve Mason 1993-5-2 31 Los Angeles Mojave Desert, off W. State Rt. 138, 1 mile past W. 110th Street., S on dirt road, 0.4 mile in, 30' off west roadside. 762 Comment
  UC1081529  Arnica cordifolia Herbert L. Mason 1936-7-27 11368 Tuolumne w of, (at Gaylor Lakes) Tioga Pass; Sierra Nevada, Yosemite National Park, Gaylor Lakes 3200 Comment
  UC912236  Artemisia pycnocephala Herbert L. Mason 1924-10-19 1128 San Francisco San Francisco Comment
  UC543763  Asarum caudatum Herbert L. Mason 1925-9-27 2236 Contra Costa San Leandro Canyon (Redwood Canyon); Oakland Hills Comment
  CAS-BOT-BC400773  Asarum lemmonii H. L. Mason 1923-7-3 306 Tuolumne Sierra Nevada Mountains, Yosemite National Park. Near Carl Inn, Big Oak Flat Road 1524 Comment
  UC635030  Asarum lemmonii H. L. Mason July 1930 5705 Calaveras Near Hermit Springs, Blue Creek, a tributary of the North Rork of the Mokelumne River, Sierra Nevada Mountains Comment
  SD47976  Asclepias californica Herbert L. Mason 1935-4-30 6263 Kern Hobo Hot Springs, Kern River Canyon. Comment
  UC1191136  Asclepias californica Herbert L. Mason 1957-5-11 14743 San Benito Headwaters of Clear Creek Comment
  UC566928  Asclepias cordifolia H. L. Mason 1923-7-14 598 Tuolumne e Mather (near Hog Ranch) Comment
  UC566929  Asclepias eriocarpa Herbert L. Mason 1923-6-14 374 Monterey river bank by King City Bridge; King City Comment
  UC566931  Asclepias vestita H. L. Mason 1934-3-30 8038 Los Angeles Yucca Grove Antelope Valley Comment
Read comments
Dec 13 2011
  SEINET197565  Asclepias vestita subsp. vestita Herbert L. Mason 1940-5-5 12274 Merced Twin Peaks, Los Banos Creek, San Carlos Range. 610 Comment
  UC912689  Aspidotis californica Herbert L. Mason 1936-4-12 11075 Amador Lancha Plana Comment
  SEINET200239  Aster campestris var. bloomeri Herbert L. Mason 1938-7-22 11977 Tuolumne Yosemite National Park ; Beehive N. of Hetch Hetchy Dam 1981 Comment
  POM312494  Aster occidentalis H. L. Mason 1947-8-9 13480 Modoc East side of Fairchild Swamp, north of Alturas Comment
  UC1178868  Astragalus breweri Herbert L. Mason 1937-5-27 11552 Lake ten mi s Kelseyville; s of Kelseyville Comment
  CAS-BOT-BC178632  Astragalus coccineus H. L. Mason 1926-4-27 3044 Los Angeles Rock Creek, Mojave Desert slope of San Gabriel Mountains Comment
  CAS-BOT-BC186726  Astragalus gambelianus H. L. Mason 1929-3-23 5098 Madera Hills back of Madera 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
  UC714404  Astragalus kentrophyta var. danaus Herbert L. Mason 1936-7-31 11468 Mono Tioga Crest e Saddlebag Lake (Tioga Pass region); Sierra Nevada, Tioga Pass Region, e of Saddlebag Lake 3474 Comment
  UC712307  Astragalus lentiginosus var. ineptus H. L. Mason 1936-7-29 11410 Mono vicinity Mount Dana (Dana Plateau, Sierra Nevada); Sierra Nevada, vicin Mount Dana, Dana Plateau 3657 Comment
  UC635306  Astragalus oxyphysus H. L. Mason 1930-3-30 5541 San Benito fourteen mi below Pinnacles (San Benito River Canyon); , below Pinnacles Comment
  UC1192369  Athyrium filix-femina var. cyclosorum Herbert L. Mason 1946-7-24 12938 Marin Third lake (at Double Point) s of Bear Valley (on rd to Lake Ranch) Comment
  UC1076498  Atriplex coulteri Herbert L. Mason 1927-11-27 4149 Santa Barbara Carpenteria Carpenteria (along ocean bluff) Comment
  UCD97637  Atriplex prostrata Herbert L. Mason 1947-8-9 13477 Modoc on east side of Fairchild Swamp, north of Alturas. Comment
  UC1076209  Atriplex semibaccata Herbert L. Mason 1927-9-24 4087 Santa Barbara on hill slopes about West Ranch (Santa Cruz Island); , about West Ranch Comment
  UC1093984  Azolla filiculoides Herbert L. Mason 1937-6-17 11544 Alameda Thornhill pool Moraga Rd. Oakland Comment
  POM312949  Azolla microphylla Herbert L. Mason, Verne Grant 1946-8-14 13018 Butte Canal near big pond on Sacramento Outing Club, Butte sink. Comment
  UC672310  Baccharis glutinosa H. L. Mason 1932-8-26 7140 Mendocino Navarro River Comment
  UC672312  Baccharis glutinosa H. L. Mason 1928-9-30 4964 San Joaquin near, San Joaquin Delta Holt; San Joaquin Delta Comment
  SEINET7881864 Image available Baeria fremontii Herbert L. Mason 1952-1 14260 Contra Costa 3.5 miles south of Byron Comment
  UC642882  Barbarea orthoceras H. L. Mason 1936-7-31 11453 Mono e of Saddlebag Lake (Tioga Crest); Sierra Nevada, Tioga Crest 3413 Comment
  CAS-BOT-BC145819  Beckmannia syzigachne Herbert L. Mason 1948-9-4 13669 b Mono Mono Lake. Rush Creek. Comment
  SACT000425  Beckmannia syzigachne Herbert Mason 1953-7-7 Sierra Sierra Valley; Common. Comment
  SEINET200167  Beckmannia syzigachne H. L. Mason 1953-7-7 14558 Sierra Sierra Valley pond 1.5 mi E of Calpine Comment
  UC1100215  Beckmannia syzigachne Herbert L. Mason 1947-7-11 13367 Modoc irrigation ditch by Jones Lane (off Hwy 395, s of Alturas) Comment
  CAS-BOT-BC75894  Berberis pinnata H. L. Mason 1922-3-29 s.n. Santa Cruz Liddell Creek Road near ocean. Comment
  UC1076432  Berberis pinnata Herbert L. Mason 1926-2-21 2652 Marin rd from Inverness to Point Reyes Light Comment
  UC1076434  Berberis pinnata Herbert L. Mason 1925-3-10 1298 Contra Costa Sycamore Canyon; Mt Diablo Comment
  JEPS47764  Berberis pinnata subsp. insularis Herbert L. Mason 1927-9-25 4103 Santa Barbara along roadway through Buena Vista Canyon; Santa Cruz Isl Comment
  UC1076439  Berberis pinnata subsp. insularis Herbert L. Mason 1927-9-25 4103 Santa Barbara along roadway through Buena Vista Canyon; Santa Cruz Isl Comment
  UC1192261  Bergia texana Herbert L. Mason, S. Galen Smith 1948-8-18 8347 Kings Just west of Stratford Comment
  UC1192267  Bergia texana Herbert L. Mason 1945-8-24 12681 Lake East Shore, Lower Lake Comment
  UC912220  Bidens frondosa Herbert L. Mason 1929-9-21 5446 Contra Costa 2.6 mi ne of Byron (Borden Highway); Borden Highway Comment
  POM312324  Bidens frondosa H. L. Mason, S. Galen Smith 1948-8-12 8333 Merced About 5 miles east of Gustine Comment
  UC1178976  Bidens tripartita Herbert L. Mason 1939-7-11 12123 Tuolumne just w of Hetch Hetchy Dam (Swamp Lake, Yosemite National Park); Yosemite National Park, Swamp Lake 1584 Comment
  UC642720  Boechera depauperata H. L. Mason 1936-7-28 11401 a Mono vicinity Mount Dana; Sierra Nevada, Dana Plateau 3657 Comment
  UC559955  Boechera divaricarpa H. L. Mason 1936-7-23 11282 Tuolumne Mount Conness Sierra Nevada 3352 Comment
  GH378753  Boechera lemmonii H. L. Mason 1936-7-24 11326 Unknown White Mountains, Conness Range, Sierra Nevada 3505 Comment
  UC714371  Boechera lyallii Herbert L. Mason 1936-7-24 11351 Tuolumne White Mountain Mount Conness Range 3505 Comment
  GH378833  Boechera paupercula H. L. Mason 1936-7-28 11416 Unknown Dana Plateau, Sierra Nevada 3657 Comment
  CAS-BOT-BC14289  Boechera pinetorum H. L. Mason 1922-8-20 344 Tuolumne Sierra Nevada Mountains. Yosemite National Park. Tuolumne Meadows. Lamberts Dome. 2743 Comment
  JEPS53156  Boechera pinetorum H. L. Mason 1922-8-20 344 Tuolumne Lambert Dome Sierra Nevada Mountains, Yosemite National Park, Tuolumne Me 2743 Comment
  UC565471  Boechera pinetorum H. L. Mason 1922-8-20 344 Tuolumne Lambert Dome Sierra Nevada Mountains, Yosemite National Park, Tuolumne Me 2743 Comment
  POM310936  Boisduvalia densiflora var. densiflora H. L. Mason 1952-7-17 14380 Plumas Sierra Nevada: Along Western Pacific tracks just south of Beckwourth, Sierra Valley. 1524 Comment
  UC1077091  Bolandra californica Herbert L. Mason 1938-7-22 11969 Tuolumne Vernon Lake Trail n Hetch Hetchy; Yosemite National Park 2072 Comment
  UC1100846  Bolboschoenus fluviatilis Herbert L. Mason 1945-8-24 12673 Lake e shore Lower Lake; e shore Lower Lake Comment
  UC1100853  Bolboschoenus maritimus Herbert L. Mason 1945-9-19 12734 Butte nw Pennington (Gray Lodge Game Refuge); , nw of Pennington Comment
  UC1100857  Bolboschoenus maritimus Herbert L. Mason 1945-9-19 12731 Butte nw Pennington (Gray Lodge Game Refuge); , nw of Pennington Comment
  UC1100888  Bolboschoenus maritimus Herbert L. Mason and Verne Grant 1947-6-26 13269 Solano Cordelia Slough, Suisun Marsh. Comment
  UC1100890  Bolboschoenus maritimus Herbert L. Mason and Verne Grant 1946-8-28 13076 B Sonoma Mouth of Tolay Creek. Comment
  UC672623  Botrychium multifidum H. L. Mason 1923-8-8 724 Tuolumne Tuolumne Meadows, Morrain[sic] Flat Sierra Nevada Mountains, Yosemite National Park Comment
  UC566877  Bowlesia incana H. L. Mason 1928-3-4 4169 a Contra Costa Shell Ridge Comment
  UC1081522  Boykinia major Herbert L. Mason 1936-7-11 11207 Mariposa w Wawona (Big Creek, a tributary of the South Fork of the Merced River); Sierra Nevada, trib of South Fork Merced River, Big Creek 1584 Comment
  UC570898  Boykinia occidentalis H. L. Mason 1928-7-11 4889 Sonoma canyon two mi n Fort Ross; n of Fort Ross Comment
  UC570899  Boykinia occidentalis Herbert L. Mason 1927-7-27 3976 Santa Cruz w end Big Basin; w end of Big Basin Comment
  UC635681  Brandegea bigelovii H. L. Mason 1928-3-10 4213 Riverside Coachella Mountains, Hidden Springs Canyon Hidden Springs Canyon; Coachella Mountains, Hidden Springs Canyon Comment
  UC1101411  Brasenia schreberi Herbert L. Mason 1945-6-29 12620 Lake Boggs Lake at base Mt. Hanna; Boggs Lake at base of Mt. Hanna Comment
  UC1101413  Brasenia schreberi Herbert L. Mason 1937-7-22 11600 Tuolumne w Hetch Hetchy Dam (Swamp Lakes, just s of Miguel Meadows, Yosemite National Park); Yosemite National Park, w of Hetch Hetchy Dam, Swamp Lakes 1584 Comment
  UC581157  Brickellia atractyloides H. L. Mason 1935-3-29 8221 San Bernardino w of Searles Lake; Poison Canyon, Mojave Desert Comment
  GH386521  Brickellia californica H. L. Mason 1930-10-25 5770 Unknown Banks of San Antonio River Comment
  JEPS18575  Brickellia californica Herbert L. Mason 1957-9-23 4083 Santa Barbara Prisoners Harbor, Santa Cruz Island. Comment
  UC571017  Brickellia californica Herbert L. Mason 1927-9-23 4083 Santa Barbara canyon back of Prisoners (Santa Cruz Island); Santa Cruz Island Comment
  CAS-BOT-BC484501  Brodiaea minor H. L. Mason 1927-5-9 3709 Butte Flats of the Sacramento Valley, 12 miles west of Oroville Comment
  CAS-BOT-BC483178  Brodiaea terrestris subsp. terrestris H. L. Mason 1917-4-10 113 San Mateo Crystal Springs Lake Comment
  UC1108827  Bromus carinatus var. carinatus Herbert L. Mason 1938-7-22 11970 Tuolumne n of Hetch Hetchy Valley (Yosemite National Park, Vernon Trail Lake); Sierra Nevada, Yosemite National Park, Vernon Trail Lake 1981 Comment
  UC1100203  Bromus hordeaceus Herbert L. Mason and Malcolm A. Nobs 1949-4-27 728 Solano Suisun State Game Refuge Comment
  UC1077129  Buddleja utahensis Herbert L. Mason 1940-3-22 12230 Inyo Titus Canyon Death Valley National Monument, Grapevine Mountains (Grapevine Mountains) Comment
  SEINET7547864 Image available Bulbostylis capillaris H. L. Mason 1938-7-6 11858 Tuolumne Yosemite National Park. Dry ridge between Swamp Lake and Miguel Meadow 1646 Comment
  UC555386  Caesalpinia virgata H. L. Mason 1928-3-10 Riverside Coachella Mts., Hidden Springs Canyon Comment
  UC673339  Cakile edentula H. L. Mason 1927-10-4 4134 Santa Cruz mouth of Waddell Creek and Ano Nuevo Point Waddell Creek; Ano Nuevo Point, Waddell Creek Comment
  UCD57206  Calamagrostis canadensis H. L. Mason 1958-8-6 14862 Tuolumne Yosemite National Park, NW of Hetch-Hetchy, Swamp Lake meadow. Comment
  CAS-BOT-BC185144  Calamagrostis nutkaensis H. L. Mason 1921-5-29 s.n. San Mateo Near Arroyo de Las Frijoles. Comment
  UC769995  Calandrinia ciliata Herbert L. Mason 1934-3-25 7942 Sacramento Keithly Ranch Sacramento Valley, Rio Linda Comment
  GH48919  Callitriche autumnalis var. bicarpellaris H. L. Mason 1928-5-3 4445 Unknown four miles north of Clementes Comment
  UC570781 Image available Callitriche hermaphroditica H. L. Mason 1928-5-3 4445 San Joaquin 4 mi n Clementes; ; San Joaquin Co. Comment
  UC570758  Callitriche heterophylla var. bolanderi H. L. Mason 1929-3-24 5111 Madera 18 mi e Madera (junction of Yosemite Road) Comment
  UC570759  Callitriche marginata H. L. Mason 1927-4-23 3697 San Mateo Pescadero Creek near Bloomquist's Mill Comment
  UC570760  Callitriche marginata H. L. Mason 1932-4-17 6961 Santa Clara Pacheco Pass, near summit Comment
  UC570776  Callitriche marginata H. L. Mason Apr 1930 5544 Calaveras 6 miles west of Valley Springs Comment
  CAS-BOT-BC95095  Callitriche palustris Herbert Louis Mason; Verne Grant 1947-7-11 13366 Modoc By Jones Lane, off Highway 395, S of Alturas. Comment
  UC1101517  Callitriche verna Herbert L. Mason and Verne Grant 1947-7-12 13383 Modoc several mi s Alturas (by Jones' Lane, off Highway 395) Comment
  UC1101518  Callitriche verna Herbert L. Mason and Verne Grant 1947-7-11 13366 Modoc s of Alturas (by Jones' Lane, off Highway 395) Comment
  UC1076512  Calocedrus decurrens H. L. Mason 1923-7-13 589 Tuolumne Hog.Ranch (Mather) Sierra Nevada Mountains, Yosemite National Park 1432 Comment
  UC1077083  Calochortus albus Herbert L. Mason 1946-6-7 12835 Santa Barbara s of Little Pine Mt. (between Camuese Creek and Oso Creek) 762 Comment
  CAS-BOT-BC492159  Calochortus albus N. L. Mason 1921-5-7 s.n. Monterey Rancho del Monte, Carmel River Comment
  UC672157  Calochortus amabilis Herbert L. Mason 1934-4-28 8068 Sonoma Jensen's Ranch Dohrman Creek Comment
  UC604422  Calochortus amoenus H. L. Mason 1938-5-10 11819 Tulare sw of Badger (near Auckland Ranch on General Grant National Park road) 457 Comment
  UC672142  Calochortus uniflorus Herbert L. Mason 1928-4-13 4327 Sonoma near Petaluma Comment
  UC672140 Image available Calochortus venustus Herbert L. Mason 1923-7-12 585 Tuolumne near Mather; Yosemite National Park, Hog Ranch Comment
  UC1111591  Caltha biflora Herbert L. Mason 1941-7-7 12504 Madera Bog just south of the Givens Lake trail junction, Yosemite National Park, Sierra Nevada. 2865 Comment
  CAS-BOT-BC91004  Calycanthus occidentalis H. L. Mason 1934-4-28 8067 Sonoma Jensen Ranch, head of Dohrman Creek. Comment
  UC565517  Calycoseris parryi H. L. Mason 1932-4-1 6880 Kern 5 mi s of, on road from Roosevelt to Muroc Muroc; Mojave Desert Comment
  UC912473  Calyptridium monospermum Herbert L. Mason 1923-7-14 595 Tuolumne Mather Comment
  HSC24623  Calyptridium quadripetalum H. L. Mason 1936-4-26 11097 Lake Barlett Springs, 16 mi. NE of Clear Lake 793 Comment
  UC1191640  Calystegia sepium subsp. binghamiae Herbert L. Mason, Verne Grant 1947-6-26 13251 Solano Cordelia Slough , Cordelia Slough (Suisun Marsh) Comment
  UC672138  Camassia quamash Herbert L. Mason 1929-4-26 5225 Marin Inverness Ridge, near summit of Light House Road Inverness Ridge; , Light House Road Comment
  UC1076526  Camassia quamash subsp. breviflora Herbert L. Mason 1936-7-7 11154 Mariposa w of Dark Hole (Yosemite National Park, Research Reserve); Sierra Nevada, Yosemite National Park Comment
  UC672139  Camassia quamash subsp. breviflora Herbert L. Mason 1926-5-29 3300 Nevada Truckee River; Sierra Nevada, Truckee River Comment
  POM257265  Camissonia campestris subsp. campestris H. L. Mason 1929-3-23 5089 Tulare Three miles above Springville, Middle Tule River. Comment
  SEINET10905986  Campanula californica Mason 1946-7-4 Mason 12894 Sonoma Pitkin Marsh, between Santa Rosa and Forestville Comment
  CAS-BOT-BC266444  Campanula exigua H. L. Mason 1935-5-9 8310 Stanislaus Slopes of Red Mountains, Arroyo del Puerto, Mount Hamilton Range Comment
  GH420320  Campanula exigua H. L. Mason 1935-5-9 8310 Unknown Red Mountains, Arroyo del Puerto, Mount Hamilton Range Comment
  SEINET3557292 Image available Campanula exigua Herbert L. Mason 1940-5-5 12281 San Benito Panoche Pass, about 20 miles SE of Paicines Comment
  SEINET10463136  Campanula prenanthoides Mason 1925-8-11 Mason 2218 Tuolumne BIG OAK FLAT RD TO TUOLUMNE GROVE Comment
  CAS-BOT-BC76300  Canbya candida Herbert L. Mason 1935-4-30 10006 Kern Walker Pass. Comment
  UC545820  Canbya candida Herbert L. Mason 1935-4-30 10006 Kern Walker Pass Comment
  UC1081567  Cardamine californica Herbert L. Mason 1936-4-11 11061 Calaveras San Antonio Creek s Sheep Ranch; San Antonio Creek s of Sheep Ranch Comment
  UC673296  Cardamine californica H. L. Mason 1930-3-30 5528 San Benito 14 mi below Pinnacles (San Benito River Canyon); , below Pinnacles Comment
  UC635581  Cardionema ramosissimum Herbert L. Mason 1926-4-18 2862 San Francisco San Francisco Comment
  CAS-BOT-BC245194  Carex atherodes Herbert Louis Mason; Verne Grant 1947-7-12 13424 Modoc Near S end of west side road, along railroad tracks, Pit River Valley, S of Alturas. Comment
  UC1100433  Carex atherodes Herbert L. Mason, Verne Grant 1947-7-12 13424 Modoc s Alturas (irrigation ditch near s end of west side road along railroad tracks); Pit River Valley Comment
  POM313130  Carex athrostachya H. L. Mason 1947-7-9 13300 Lassen Irrigation ditch 5 miles east of Bieber. Comment
  YM-YOSE65382  Carex athrostachya H. L. Mason 1938-8-1 12071 Tuolumne MEADOW IN TILTILL VALLEY 1676 Comment
  UC1100430  Carex aurea Herbert L. Mason, Lawrence W. Reinecke 1937-7-22 11586 Tuolumne just s Miguel Meadows (w of Hetch Hetchy Dam); Yosemite National Park, Swamp Lakes 1584 Comment
  UC1100431  Carex aurea Herbert L. Mason, Lawrence W. Reinecke 1937-7-21 11558 Tuolumne just nw Hetch Hetchy Dam; Yosemite National Park, Miguel Meadows Comment
  CHSC2105  Carex barbarae P. Mason 1937-5-15 Butte Fish wheel on Butte Creek. 91 Comment
  CAS-BOT-BC110206  Carex buxbaumii H. L. Mason 1938-7-11 11942 Tuolumne Yosemite National Park. South island in Swamp Lake, west of Hetch Hetchy. 1584 Comment
  UC1102955  Carex buxbaumii Herbert L. Mason 1958-8-9 14897 Tuolumne w side of Hetch Hetchy Dam (meadow at Swamp Lake); Sierra Nevada, Yosemite National Park, Swamp Lake 1584 Comment
  UC599133  Carex buxbaumii H. L. Mason 1938-7-9 11890 Tuolumne w Hetch Hetchy; Yosemite National Park, Swamp Lake 1584 Comment
  YM-YOSE65387  Carex buxbaumii H. L. Mason 1938-7-9 11890 Tuolumne SWAMP LAKE RESEARCH RESERVE. SOUTH ISLAND 1584 Comment
  YM-YOSE65389  Carex buxbaumii H. L. Mason 1938-7-11 11942 Tuolumne SWAMP LAKE RESEARCH RESERVE. SOUTH ISLAND Comment
  UC1100425  Carex californica Herbert L. Mason 1932-8-26 7152 Mendocino Mendocino City, Pine Barrens Comment
  GH424010  Carex capillaris H. L. Mason 1938-7-13 11946 Unknown base of El Capitan, Yosemite Valley 1226 Comment
  CAS-BOT-BC34365  Carex congdonii H. L. Mason 1938-7-28 12046 Tuolumne Yosemite National Park. Macomb Ridge, east of Tilden Lake. 3048 Comment
  UC599129  Carex congdonii H. L. Mason 1938-7-28 12046 Tuolumne e Tilden Lake; Yosemite National Park, Macomb Ridge 3048 Comment
  RSA23336  Carex cusickii H. L. Mason 1938-7-10 11923 Tuolumne South island in Swamp Lake, west of Hetch Hetchy, 1585 Comment
  UC965593  Carex cusickii Herbert L. Mason 1952-7-19 14416 Nevada meadow opposite University of California Trout Laboratory; Sierra Nevada, Sage Hen Creek 1981 Comment
  UC965606  Carex douglasii Herbert L. Mason 1952-7-19 14433 Nevada meadow opposite University of California Trout Laboratory; Sierra Nevada, Sage Hen Creek 1981 Comment
  CAS-BOT-BC19875  Carex echinata subsp. echinata H. L. Mason 1938-7-10 11922 Tuolumne Yosemite National Park. South Island in Swamp Lake, west of Hetch Hetchy. 1584 Comment
  UCD140298  Carex echinata subsp. phyllomanica Herbert L. Mason 1946-5-18 12760 Mendocino east of Fort Bragg. Comment
  UC1100513  Carex feta Herbert L. Mason 1937-7-21 11561 Tuolumne just nw Hetch Hetchy; Yosemite National Park, Miguel Meadow 1524 Comment
  UCD140311  Carex feta Herbert L. Mason; Lawrence W. Reinecke 1937-7-21 11561 Tuolumne Miguel Meadows, just northwest of Hetch Hetchy Dam, Yosemite National Park. 1524 Comment
  UC599115  Carex filifolia var. erostrata H. L. Mason 1938-7-7 11875 Tuolumne ridge e Swamp Lake (between Swamp Lake and Hetch Hetchy); Yosemite National Park 1676 Comment
  UC1100438  Carex harfordii Herbert L. Mason 1946-7-24 12936 Marin Third lake (at Double Point) S of Bear Valley on road to Lake Ranch Comment
  UC599128  Carex heteroneura H. L. Mason 1938-7-28 12042 Tuolumne Yosemite National Park. Macomb Ridge east of Tilden Lake. Comment
  CAS-BOT-BC22056  Carex heteroneura H. L. Mason 1938-7-30 12056 Tuolumne Yosemite National Park. South end of Tiltill Moutain. 2590 Comment
  CAS-BOT-BC31516  Carex limosa H. L. Mason; L. Reinecke 1937-7-22 11586 Tuolumne Swamp Lakes, just S of Miguel Meadows, W of Hetch Hetchy. Yosemite National Park. 1584 Comment
  YM-YOSE65466  Carex luzulifolia H. L. Mason 1938-7-28 12041 Tuolumne MACOMB RIDGE EAST OF TILDEN LAKE 3048 Comment
  CAS-BOT-BC31853  Carex microptera Herbert L. Mason 1952-7-19 14421 Nevada Meadow opposite UC Trout Laboratory, Sage Hen Creek. 1981 Comment
  CAS-BOT-BC119824  Carex nebrascensis Herbert L. Mason 1952-7-16 14348 Nevada One mi W of Univ of CA Trout Laboratory. Sage Hen Creek. 1981 Comment
  YM-YOSE65510  Carex ormantha H. L. Mason 1938-7-10 11922 Tuolumne SWAMP LAKE RESEARCH RESERVE. SOUTH ISLAND. SWAMP LAKE Comment
  UC1100510  Carex pellita Herbert L. Mason, Verne Grant 1947-7-12 13423 Modoc s Alturas (irrigation ditch near s end of west side road, along railroad tracks); Pit River Valley Comment
  UC1100475  Carex praegracilis Herbert L. Mason, Verne Grant 1947-7-12 13439 Modoc n Likely; Corporation Ranch Headquarters Comment
  CAS-BOT-BC118800  Carex preslii H. L. Mason 1938-7-28 12043 Tuolumne Macomb Ridge E of Tilden Lake. 3048 Comment
  UC599131  Carex raynoldsii H. L. Mason 1938-7-26 12021 Tuolumne Meadows Jack Main; Yosemite National Park, Andrew Peak 2438 Comment
  CAS-BOT-BC116945  Carex subbracteata H. L. Mason 1921-5-14 s.n. Alameda Hayward Comment
  UC965625  Carex utriculata Herbert L. Mason 1952-7-19 14415 Nevada meadow opposite University of California Trout Laboratory; Sierra Nevada, Sage Hen Creek 1981 Comment
  UC965615  Carex vernacula Herbert L. Mason 1952-7-11 14324 Nevada bog at head of meadow 1 mi w University of California Trout Laboratory; Sierra Nevada, Sage Hen Creek 1981 Comment
  UC1106322  Carex vesicaria Herbert L. Mason, B. Fuller, H. Whisler 1958-7-13 19 Nevada 1 mi w Unniversity of California Trout Laboratory (peat meadow back of stream, 12 mi n of Truckee); Sierra Nevada, Sage Hen Creek 1981 Comment
  UC1178874  Castilleja affinis subsp. neglecta Herbert L. Mason 1940-5-20 12286 Marin back of Tiburon Comment
  UC1081504  Castilleja angustifolia H. L. Mason 1926-4-28 3087 San Bernardino Box S Ranch Comment
  UC673457  Castilleja exserta H. L. Mason 1940-3-23 5087 Tulare 3 mi above Springville; Middle Tule River Comment
  UC673435  Castilleja exserta subsp. exserta Herbert L. Mason 1926-4-25 2935 Orange 5 mi s Laguna 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
  UC1081509  Castilleja foliolosa H. L. Mason 1928-3-4 4169 Contra Costa Shell Ridge Comment
  UC673465  Castilleja lacera H. L. Mason 1928-5-4 4507 El Dorado 4 mi n Shingle Spring; Greene Valley Comment
  UC673468  Castilleja lacera H. L. Mason 1923-7-26 653 Tuolumne Hog Ranch Hog Ranch, Mather; Mather Comment
  UC673469  Castilleja lacera H. L. Mason 1931-5-9 5871 Siskiyou 3 mi w Weed Comment
  JEPS45660  Castilleja linariifolia H. L. Mason 1953-7-21 14563 Mono just e Campito Mountain (near road to Naval Physiological Research Station, near White Mountain Peak); White Mountains 3352 Comment
  UC1191866  Castilleja minor subsp. minor Herbert L. Mason 1948-9-4 13651 Mono Rush Creek; Mono Lake Comment
  UC1039786  Castilleja nana H. L. Mason 1923-8-2 705 Tuolumne headwaters of the Unicorn Creek Sierra Nevada, Yosemite National Park, Tuolumne River (a tributary of the Tuolumne River, low ridge w of lakes) Comment
  JEPS19684  Castilleja nana Herbert L. Mason 1938-7-22 11980 Mariposa 3 mi n and above Hetch Hetchy Valley (on the slopes of The Beehive); The Beehive 2133 Comment
  JEPS3603  Castilleja pilosa Herbert L. Mason 1953-6-16 14550 Sierra at junction of the Beckwourth to Sierraville road with the Calpine road; Sierra Valley Comment
  UC545817  Caulanthus californicus Herbert L. Mason 1935-5-2 10001 Kern one mi e Lost Hills (nw Kern County); e of Lost Hills Comment
  SD47959  Caulanthus cooperi Herbert L. Mason 1940-3-22 12233 Inyo Titus Canyon, Grapevine Mountains, Death Valley National Monument. Comment
  UC592143  Caulanthus coulteri H. L. Mason 1929-3-24 5112 Madera junction of Yosemite Road eighteen mi e Madera; e of Madera Comment
  UC634561  Ceanothus confusus H. L. Mason 1934-4-28 8072 Sonoma Jensen's Ranch, at head of Dohrmans Creek Comment
  CAS-BOT-BC48677  Ceanothus cordulatus Herbert L. Mason 1925-8-11 2211 Tuolumne Big oak Flat road near Tuolumne Grove Comment
  UC634801  Ceanothus crassifolius Herbert L. Mason 1923-6-16 434 Santa Barbara La Combre Peak Comment
  UC635526  Ceanothus foliosus Herbert L. Mason 1925-4-12 1329 Marin Pipeline Trail Mt. Tamalpais Comment
  UC912395  Ceanothus foliosus Herbert L. Mason 1929-4-29 5231 Lake just e of Hopland Mayacama Range Comment
Read comments
Jul 28 2015
  UC634803  Ceanothus griseus Herbert L. Mason Jun 1923 555 Monterey Point Lobos Comment
  UC634812  Ceanothus griseus H. L. Mason 1929-3-2 5023 Monterey 20 mi s of Carmel Big Sur Rd. Comment
  CAS-BOT-BC51002  Ceanothus integerrimus Herbert L. Mason 1923-7-9 575 Tuolumne Mather Comment
  GH349712  Ceanothus lemmonii H. L. Mason 1926-5-29 3284 Unknown Rattlesnake Creek five miles south of Grass Valley 609 Comment
  UC634625  Ceanothus lemmonii H. L. Mason 1926-5-29 3285 Placer near Alta (Donner Pass) Comment
  UC634987  Ceanothus lemmonii H. L. Mason 1927-5-19 3714 Butte ne Oroville (Cherokee Mine.); Table Mt. Comment
  CAS-BOT-BC51286  Ceanothus leucodermis Herbert L. Mason 1926-4-30 3113 Riverside Temecula Canyon, 1 mile South of Temecula, Southwestern Riverside Co. Comment
  UC634615  Ceanothus leucodermis H. L. Mason 1926-4-11 2856 Alameda Rancho Repose, Mount Hamilton Range. Comment
  UC634619  Ceanothus leucodermis Herbert L. Mason 1926-6-21 530 San Luis Obispo a few mi above on hwy San Luis Obispo (Camp Fremont) Comment
  UC634563  Ceanothus megacarpus var. megacarpus Herbert L. Mason 1923-6-16 441 Santa Barbara La Combre Peak Santa Barbara Comment
  GH349974  Ceanothus palmeri H. L. Mason 1928-5-3 4488 Unknown near bridge of Cosumnes River at mouth of Clark Creek Comment
  CAS-BOT-BC51902  Ceanothus parvifolius Herbert L. Mason 1925-5-31 3343 Calaveras 1 mile West of Calaveras Grove Comment
  UC912386  Ceanothus parvifolius Herbert L. Mason 1928-5-4 4518 El Dorado Rose Springs, Eggars. Comment
  CAS-BOT-BC53131  Ceanothus perplexans Herbert L. Mason; Peirson; Munz 1926-4-30 3173 San Diego Palomar Mt. Comment
  UC634575  Ceanothus thyrsiflorus Herbert L. Mason 1926-2-21 2651 Marin Inverness Comment
  UC634810  Ceanothus tomentosus H. L. Mason 1928-5-3 4467 Amador hills one mi s Ione; s of Ione Comment
  GH425422  Ceanothus tomentosus H. L. Mason 1932-4-24 6986 Unknown 3 miles south of Ione Comment
  UC634853  Ceanothus velutinus Herbert L. Mason 1926-3-6 2699 Marin Corte Madera Ridge , Corte Madera Ridge (Mt. Tamalpais) Comment
  RSA23385  Ceanothus velutinus subsp. velutinus H. L. Mason 1939-8-3 12200 Placer Squaw Valley 7 miles NW of Tahoe City. 1890 Comment
  UC1100196  Cenchrus longispinus Herbert L. Mason and S. Galen Smith 1948-7-30 8259 Stanislaus on Crow's Landing raod about 7 mi s Modesto Comment
  UC566946  Centaurium exaltatum H. L. Mason 1928-10-2 4978 Monterey 1 mi below Salinas; Salinas River Comment
  UC1191678  Centaurium exaltatum Herbert L. Mason 1947-8-15 13553 Modoc e side Goose Lake (on Willow Ranch); Mouth of Crane Creek Comment
  UC566918  Centaurium venustum H. L. Mason 1926-4-30 3126 Riverside Pala Grade Temescal Canyon Comment
  UC912272  Centromadia pungens subsp. pungens H. L. Mason 1929-9-21 5438 Contra Costa Marsh Creek Road 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
  UC936210  Cerastium beeringianum var. capillare H. L. Mason 1936-7-28 11428 Mono Mt. Dana Plateau Comment
  UC635509  Ceratophyllum demersum H. L. Mason 1928-10-2 4984 Monterey Salinas River one mi below Salinas; Salinas River Comment
  UC1101322  Ceratophyllum demersum Herbert L. Mason and Verne Grant 1946-8-8 12994 Butte Sanford Slough on Tule Gun Club (Butte Sink); , Sanford Slough Comment
  UCD137763  Ceratophyllum demersum Herbert L. Mason; Verne Grant 1946-8-8 12994 Butte Butte Sink. Sanford Slough on Tule Gun Club. Comment
  UC555651  Cercocarpus betuloides var. betuloides H. L. Mason 1929-6-2 5359 Kern Tejon Pass 30 mi from Bakersfield; Tehachapi Mountains, Tejon Pass Comment
  UC555653  Cercocarpus betuloides var. betuloides H. L. Mason 1928-10-31 3645 Alameda se side of Cedar Mountain Comment
  UC1081549  Chaenactis alpigena Herbert L. Mason 1936-7-6 11141 Mariposa w of Yosemite Creek (Hetch Hetchy Trail); Sierra Nevada, Yosemite National Park 2286 Comment
  UC566687  Chaenactis fremontii H. L. Mason 1928-3-11 4328 Riverside near Indio Comment
  UC565627  Chaenactis glabriuscula var. glabriuscula H. L. Mason 1931-4-5 5817 Contra Costa Antioch sandhills Antioch Comment
  CAS-BOT-BC284560  Chaenactis glabriuscula var. heterocarpha H. L. Mason 1929-4-29 5246 Lake Two and nine-tenths miles west of Lakeport Comment
  GH414782  Chaenactis glabriuscula var. orcuttiana H. L. Mason 1926-4-25 2914 Unknown Five miles south of Laguna Comment
Read comments
Feb 3 2015
  UC565566  Chaenactis glabriuscula var. orcuttiana H. L. Mason 1926-4-25 2914 Orange 5 mi s Laguna Comment
Read comments
Feb 3 2015
  UC565572  Chaenactis stevioides H. L. Mason 1926-4-27 3051 San Bernardino 30 mi w of Victorville; Mojave Desert Comment
  UC570790  Chamaesyce maculata H. L. Mason 1929-10-4 5451 Placer 1.5 mi above Auburn Comment
  RSA312310  Chamaesyce serpillifolia H. L. Mason, Verne Grant, C. T. Mason 1947-7-10 13325 Modoc Dorris Reservoir, 2 miles east of Alturas. Comment
  UC570792  Chamaesyce serpillifolia subsp. hirtula H. L. Mason 1930-10-25 5789 Monterey between Jolon and Santa Lucia Rnger Staion (along the San Antonio River); foothills of the Santa Lucia Mtns Comment
  UC672640  Cheilanthes clevelandii Herbert L. Mason 1926-5-1 3168 San Diego Palomar Mt Comment
  UC1076335  Cheilanthes gracillima Herbert L. Mason 1925-2-1 1221 Marin Mt Tamalpais Comment
  UC1076539  Cheilanthes gracillima Herbert L. Mason 1938-7-25 11986 Tuolumne n side of Jack Main Canyon (slopes of Mahan Peak); Sierra Nevada, Yosemite Nat'l Park, Jack Main Canyon 2438 Comment
  UC1191185  Cheilanthes gracillima Herbert L. Mason Tuolumne Jack Main Canyon; Sierra Nevada, Yosemite Nat'l Park 2286 Comment
  UC965591  Chenopodium atrovirens Herbert L. Mason 1952-7-16 14370 Nevada 1 mi w University of California Trout Laboratory; Sierra Nevada, Sage Hen Creek 1981 Comment
  UC1191323  Chenopodium chenopodioides Herbert L. Mason 1947-8-15 13555 Modoc Crane Creek Goose Lake, Willow Ranch (mouth, e side of lake) Comment
  SEINET5765177 Image available Chenopodium hians Herbert L. Mason 1939-1 12173 El Dorado N side of Luther Pass, 1 mi W of Grass Lake Meadow 2347 Comment
  POM312489  Chenopodium macrospermum var. farinosum H. L. Mason 1946-6-9 12865 San Luis Obispo Dune Lakes, between Oceano and mouth of Santa Maria River. Comment
  UC1191347  Chenopodium macrospermum var. halophilum Herbert L. Mason 1946-6-9 12865 San Luis Obispo between Oceano and mouth of Santa Maria River; Dune Lakes Comment
  SEINET5765059 Image available Chenopodium pumilio Herbert L. Mason 1933-1 7286 Amador Silver Lake, Sierra Nevada [Alpine County err.] Comment
  UC1191348  Chenopodium pumilio Herbert L. Mason and S. Galen Smith 1948-7-29 8250 Merced salt slough at end Turner Island Road (e of Las Banos) Comment
  UC1191335  Chenopodium strictum var. glaucophyllum Herbert L. Mason and Verne Grant 1946-8-7 12978 Colusa 8 mi n Colusa; Butte Sink Comment
  UC635149  Chimaphila umbellata H. L. Mason 1924-6-18 1054 Plumas rd. between Graeagle and Gold Lake Comment
  SACT000741  Chloris virgata Herbert Mason, S. Smith 1948-7-27 Merced Moist ground by ditch. Just south of Newman. Comment
  CAS-BOT-BC191212  Chorizanthe douglasii Herbert L. Mason 1921-5-7 s.n. Monterey Rancho del Monte Carmel River Comment
  CAS-BOT-BC191220  Chorizanthe douglasii H. L. Mason 1923-6-23 542 Monterey Carmel River, ten miles above Carmel Comment
  JEPS19625  Chorizanthe obovata Herbert L. Mason 1946-6-7 12822 Santa Barbara 0.5 mi w Camuesa (Mono Flat); Mono Flat Comment
  UC635058  Chorizanthe obovata H. L. Mason 1923-6-22 532 San Luis Obispo just above San Luis Obispo (Camp Fremont); above San Luis Obispo, Camp Fremont Comment
  CAS-BOT-BC257398  Chorizanthe pungens var. pungens H. L. Mason 1923-6-23 565 Monterey Del Monte Comment
  UC635055  Chorizanthe staticoides Herbert L. Mason 1923-6-16 443 Santa Barbara along trail to La Cumbre Peaks; trail to La Cumbre Peaks Comment
  UC635059  Chorizanthe staticoides Herbert L. Mason 1926-4-25 2913 Orange 5 mi below Laguna; below Laguna Comment
  UC635060  Chorizanthe staticoides Herbert L. Mason 1923-6-22 531 San Luis Obispo just above San Luis Obispo (Camp Fremont); just above San Luis Obispo, Camp Fremont Comment
  UC635281  Chylismia claviformis subsp. aurantiaca H. L. Mason 1928-3-10 4182 Riverside Whitewater River Comment
  UC635283  Chylismia claviformis subsp. claviformis H. L. Mason 1926-4-27 3038 Los Angeles Rock Creek Comment
  UC912498  Cirsium andersonii Herbert L. Mason 1923-8-22 761 Tuolumne Lyell Fork Comment
  UC912553  Cirsium douglasii var. douglasii Herbert L. Mason 1932-7-21 7107 Humboldt on road from Arcata to Weaverville (e slope of South Fork Mountains); North Coast Ranges Comment
  CAS-BOT-BC286356  Cirsium scariosum Herbert L. Mason 1952-7-11 14334 Nevada Sierra Nevada. One mile west of University of California Trout Laboratory. Sage Hen [Sagehen] Creek 1981 Comment
  SEINET7836837 Image available Cirsium scariosum H. L. Mason 1952-7-11 14334 Nevada Sage Hen Creek, one mile west of University of California Trout Laboratory 1981 Comment
  UC965579  Cirsium scariosum var. americanum Herbert L. Mason 1952-7-11 14334 Nevada one mi w University of California Trout Laboratory; Sierra Nevada, Sage Hen Creek 1981 Comment
  CAS-BOT-BC169777  Cistanthe quadripetala Herbert L. Mason 1936-4-26 11097 a Lake Bartlett Springs, 16 miles NE of Clear Lake 792 Comment
  GH376996  Cistanthe quadripetala H. L. Mason 1936-4-26 11097 a Unknown Bartlett Springs, sixteen miles northeast of Clear Lake 792 Comment
  POM257246  Clarkia amoena subsp. amoena H. L. Mason 1928-7-10 4881 Marin Along Tomales Bay, Millerton. Comment
  POM257250  Clarkia arcuata H. L. Mason 1932-4-25 6997 Amador Vorhees School, near Dry Creek Comment
  CAS-BOT-BC163624  Clarkia biloba subsp. biloba H. L. Mason 1925-6-27 2123 Tuolumne Hog Ranch, near Mather Comment
  POM256502  Clarkia bottae H. L. Mason, Edward Lee 1935-6-15 9339 Monterey Point Lobos State Park. Comment
  POM257280  Clarkia breweri H. L. Mason 1928-5-6 4557 Alameda Cedar Mountain, Mount Hamilton Range. Comment
  CAS-BOT-BC164286  Clarkia cylindrica subsp. cylindrica H. L. Mason 1929-6-2 5356 Kern Coloring fields on northeast slopes of Tehachapi Mountains, Tejon Pass, thirty miles from Bakersfield Comment
  UC634706  Clarkia davyi H. L. Mason June 1930 5615 Mendocino Cloverdale to Fort Bragg; Navarro River Comment
  RSA125763  Clarkia heterandra H. L. Mason 1938-5-10 11813 Tulare Near Auckland Comment
  CAS-BOT-BC165008  Clarkia rhomboidea H. L. Mason 1926-7-4 2150 Tuolumne Mather Comment
  SEINET10492526  Clarkia rhomboidea Herbert L. Mason 1925-7-4 Mason 2150 Tuolumne Mather, California Comment
  CAS-BOT-BC165171  Clarkia rubicunda H. L. Mason 1921-7-14 s.n. San Mateo La Honda - Pescadero Road near Pescadero Creek Comment
  UC634691  Clarkia speciosa subsp. polyantha H. L. Mason 1929-6-2 5355 Kern 30 mi from Bakersfield; Tehachapi Mountains, Tejon Pass Comment
  CAS-BOT-BC165545  Clarkia unguiculata H. L. Mason 1921-5-7 s.n. Monterey Rancho del Monte, Carmel River Comment
  POM257253  Clarkia williamsonii H. L. Mason 1925-7-4 2149 Tuolumne Mather. Comment
  UC1076046  Claytonia lanceolata Herbert L. Mason 1947-5-17 14775 Unknown summit of Scott Mountain Scott Mountain (Trinity-Siskiyou county line) Comment
  UC561009  Claytonia nevadensis H. L. Mason 1936-7-31 11462 Mono e of Saddlebag Lake (Tioga Crest); Sierra Nevada, Tioga Crest 3474 Comment
  UC635331  Claytonia nevadensis H. L. Mason 1923-9-15 786 Tuolumne Tioga mines; Sierra Nevada Mountains, Yosemite National Park Comment
  UC635328  Claytonia parviflora subsp. parviflora H. L. Mason 1925-7-27 2177 Tuolumne Hog Ranch, Mather; Mather Comment
  UC1111600  Claytonia parviflora subsp. parviflora Herbert L. Mason 1936-3-21 11028 Mariposa 3 mi n Coulterville Comment
  CAS-BOT-BC439818  Claytonia perfoliata H. L. Mason 1925-7-27 2177 Tuolumne Hog Ranch, Mather Comment
  UC1111598  Claytonia rubra subsp. rubra Herbert L. Mason 1936-4-26 11097 Lake 1.5 mi e Bartlett Springs Comment
  POM270596  Clematis ligusticifolia H. L. Mason 1927-7-31 4008 Santa Cruz Mt. Herman, Santa Cruz Mts. Comment
  UC1275784  Cleome sparsifolia Herbert L. Mason 1963-7-4 15222 Mono near Artesian Well (Sulphur Springs, ne shore of Mono Lake); Mono Lake, Sulphur Springs Comment
  UC555323  Coleogyne ramosissima H. L. Mason 1926-4-28 3082 San Bernardino Box S Spring Comment
  UC672485  Collinsia bartsiifolia var. bartsiifolia H. L. Mason 1929-4-29 5238 Lake 2.9 mi w Lakeport (on road to Hopland) Comment
  POM224206  Collinsia callosa H. L. Mason 1935-4-29 s.n. Kern Two mile west of Walker Pass. Comment
  SBBG27279  Collinsia callosa H. L. Mason 1935-4-29 10002 Kern 2 mi W of Walker Pass Comment
  UC1178860  Collinsia corymbosa Herbert L. Mason 1940-5-22 12299 Mendocino near Fort Bragg (headland n of Pudding Creek Slough) Comment
  UC632787  Collinsia greenei H. L. Mason 1936-4-26 11094 Lake e side Bartlett Mtn; Inner North Coast Ranges Comment
  UC1178872  Collinsia heterophylla Herbert L. Mason 1940-5-20 12288 Marin outcrop back of Tiburon Comment
  UC672474  Collinsia heterophylla H. L. Mason 1929-4-7 5182 Stanislaus about 10 mi e of Oakdale (Sierra Nevada Foothills); Sierra Nevada Foothills Comment
  UC604424  Collinsia heterophylla H. L. Mason 1938-5-10 11814 Tulare near Auckland Ranch on General Grant National Park Road sw of Badger; General Grant National Park Road 457 Comment
  UC672451  Collinsia parryi H. L. Mason 1927-6-11 3751 Los Angeles San Gabriel Mountains, Mount Wilson Mount Wilson; San Gabriel Mountains, Mount Wilson 1219 Comment
  UC672477  Collinsia sparsiflora var. arvensis H. L. Mason 1928-4-8 4298 Sonoma fields near Sebastopol Comment
  UC672470  Collinsia sparsiflora var. collina Herbert L. Mason 1929-3-15 5051 Contra Costa Nortonville Comment
  UC632827  Collinsia sparsiflora var. collina Herbert L. Mason 1936-3-21 11026 Mariposa 3 mi n Coulterville Comment
  POM247279  Collinsia torreyi H. L. Mason 1936-7-15 11258 Mariposa Tamarack Flat, old Big Oak Flat Road. Yosemite National Park. 1921 Comment
  UC1540455  Collinsia torreyi var. torreyi Herbert L. Mason 1936-7-15 11258 Mariposa Yosemite National Park, Tamarack Flat, old Big Oak Flat Road Tamarack Flat; Yosemite National Park, Tamarack Flat 1920 Comment
  UC588122  Collinsia torreyi var. torreyi Herbert L. Mason 1936-7-15 11258 Mariposa Yosemite National Park, Tamarack Flat, old Big Oak Flat Road Tamarack Flat; Yosemite National Park, Tamarack Flat 1920 Comment
  UC1076032  Collomia diversifolia Herbert L. Mason 1947-5-18 14793 Tehama w Paskenta; Paskenta Grade Comment
  UC1178932  Collomia diversifolia Herbert L. Mason 1953-4-18 14152 Lake serpentine ridge 4.5 mi n Middletown (near Anderson's Springs) Comment
  UC907801  Collomia grandiflora Herbert L. Mason 1946-6-8 12848 Santa Barbara Bluff Camp Big Pine Mountain Comment
  CAS-BOT-BC229514  Collomia rawsoniana H. L. Mason 1938-7-16 11954 Madera Cascadel Ranch on a tributary to Whisky Creek, 3 miles E of South Fork 1127 Comment
  SBBG29129  Collomia rawsoniana H. L. Mason 1938-7-16 11954 Madera Cascadel Ranch on a tributary to Whisky Crk, 3 mi E of S Fk 1127 Comment
  UC1191641  Collomia tinctoria Herbert L. Mason 1948-7-17 13596 Siskiyou hills near Grass Lake Comment
  UCD118258  Collomia tinctoria Herbert L. Mason 1948-7-18 13606 b Siskiyou Grass Lake. Comment
  UC971919  Collomia tracyi Herbert L. Mason 1950-7-15 14043 Siskiyou stream wash Scott Valley, Scott Creek Comment
  SBBG72464  Comarum palustre H. L. Mason 1940-7-25 12331 El Dorado Grass lake, Luther Pass 2377 Comment
  UC1051489  Convolvulus simulans Herbert L. Mason 1952-4-27 14282 San Benito San Carlos Canyon Comment
  UCD126183  Convolvulus simulans Herbert L. Mason 1946-6-7 12833 Santa Barbara between Camuesa Creek and Oso Creek south of Little Pine Mountain, Santa Barbara. 762 Comment
  UC1191875  Cordylanthus mollis subsp. hispidus Herbert L. Mason and S. Galen Smith 1948-8-9 8306 Merced 2 mi n Dos Palos (along old Santa Fe grade) Comment
  UC672489  Cordylanthus rigidus subsp. littoralis H. L. Mason September, 1930 5908 Monterey between Monterey and Castroville (upper end of slough); Elkhorn Slough Comment
  JEPS16345  Cordylanthus tenuis subsp. capillaris H. L. Mason 1946-7-4 12900 Sonoma 2 mi e Occidental; ; E of Occidental, Sonoma Co. Comment
  UC964790  Cordylanthus tenuis subsp. viscidus Herbert L. Mason 1950-7-16 14064 Siskiyou 5 mi s summit of road from Happy Camp CA to Waldo OR Comment
  CAS-BOT-BC287722  Coreopsis bigelovii Herbert L. Mason 1932-4-1 6882 Kern 5 miles S of Muroc, Mojave Desert Comment
  UC566775  Coreopsis californica var. californica Herbert L. Mason 1926-4-26 3003 Los Angeles Little Rock Comment
  UCD131019  Coreopsis stillmanii Herbert L. Mason 1936-3-21 11019 Tuolumne 4 miles north of Coulterville. Comment
  UC1093911  Corethrogyne filaginifolia Herbert L. Mason 1936-9-13 11529 Santa Clara w Madrone Station Comment
  UC672298  Corethrogyne filaginifolia H. L. Mason 1926-5-26 3252 Alameda Niles Canyon Comment
  UC672299  Corethrogyne filaginifolia H. L. Mason 1928-4-25 4365 San Francisco Hunter's Point Comment
  UC672301  Corethrogyne filaginifolia H. L. Mason 1927-9-24 4092 Santa Barbara slopes about West Ranch; Santa Cruz Island Comment
  UC672303  Corethrogyne filaginifolia Herbert L. Mason 1927-7-31 4000 Santa Cruz Mt. Herman Santa Cruz Mountains Comment
  UC912321  Corethrogyne filaginifolia Herbert L. Mason 1927-10-4 4129 Santa Cruz mouth Waddell Creek; Ano Nuevo Point Comment
Read comments
Jun 27 2008
  UC634827  Cornus glabrata H. L. Mason 1929-10-12 5486 San Luis Obispo 4.3 mi. w. Atascadero (along Atascadero Creek) Comment
  RSA44062  Cornus nuttallii H. L. Mason 1926-3-21 2781 Lake Near summit of road from Middletown to Mount St. Helena. Comment
  UC1192136  Cotula coronopifolia Herbert L. Mason and Verne Grant 1947-6-26 13241 Solano Cordelia Slough; Suisun Marsh Comment
  UC912224  Cotula coronopifolia Herbert L. Mason 1927-4-24 3707 San Mateo mouth of San Gregorio Creek Comment
  UC571143  Crassula connata var. subsimplex H. L. Mason 1926-3-6 2693 Marin Corte Madera Ridge Comment
  UC565498  Crepis capillaris H. L. Mason 1929-8-24 5398 Mendocino Pudding Creek Slough Fort Bragg (in bogs) Comment
  UC1191647  Cressa truxillensis Herbert L. Mason 1947-8-15 13541 Modoc e. side Goose Lake (mouth of Crane Creek on Willow Ranch); Willow Ranch, Crane Creek, Goose Lake Comment
  UC635026  Cressa truxillensis H. L. Mason 1928-9-2 4943 Alameda Bay Farm Island Comment
  UC632866  Crocanthemum scoparium var. scoparium H. L. Mason 1938-5-7 11775 Santa Barbara Burton Mesa Comment
  UC1093933  Crocanthemum scoparium var. vulgare Herbert L. Mason 1935-5-30 8324 Lake hills w Mirabel Mine Comment
  UC634906  Crocanthemum scoparium var. vulgare Herbert L. Mason 1925-10-25 2247 Santa Cruz Pine Mt. trail Big Basin Comment
  UC566631  Crocidium multicaule H. L. Mason 1929-4-29 5243 Lake about 3 mi w Lakeport (on Hopland road) Comment
  POM313218  Crypsis schoenoides H. L. Mason 1945-9-19 12729 Butte Gray Lodge Game Refuge, northwest of Pennington Comment
  GH424701  Cryptantha circumscissa H. L. Mason 1932-4-1 6868 Unknown One mile east of Lancaster, Mojave Desert Comment
  UC573097  Cryptantha flaccida H. L. Mason 1926-4-10 2804 Alameda near Cedar Mountain; Mount Hamilton Range, Arroyo Mocho Comment
  GH420039  Cryptantha holoptera H. L. Mason 1928-3-10 4232 Unknown Hidden Springs Canyon, Coachella Mts. Comment
  UC573134  Cryptantha micrantha Herbert L. Mason 1932-4-1 6867 Los Angeles 1 mi e Lancaster; Mojave Desert Comment
  UC1039609  Cryptogramma acrostichoides Herbert L. Mason Jul 7 1939-Jul 8 1939 12149 Nevada 3 mi w Donner Summit; Sierra Nevada 2072 Comment
  UC1093684  Cryptogramma acrostichoides Herbert L. Mason 1926-7-12 2894 Plumas Mt Elwell Comment
  UC1076279  Cupressus goveniana subsp. pygmaea Herbert L. Mason 1928-10-21 5009 Mendocino no of Fort Bragg; Pudding Creek Comment
  UC1179014  Cupressus goveniana subsp. pygmaea Herbert L. Mason 1928-10-21 5001 Mendocino Fort Bragg Comment
  NY16757  Cupressus macrocarpa H. L. Mason 1934-10-21 10023 Monterey Point Lobos Comment
  UC1076285  Cupressus macrocarpa H. L. Mason 1923-6-23 559 Monterey Cypress Point Comment
  CAS-BOT-BC85504  Cupressus sargentii Herbert Louis Mason 1926-4-16 s.n. Alameda Type locality: Cedar Mountain. Near the summit growing in volcanic rock Comment
  UC179019  Cupressus sargentii Herbert L. Mason 1926-10-31 3644 Alameda Cedar Mountain Comment
  UC567067  Cupressus sargentii Mason 1932-7-19 123 Sonoma 3/5 mi nw Los Alamos School; Santa Rosa Quadrangle 571 Comment
  UC1191664  Cuscuta californica Herbert L. Mason and Verne Grant 1946-9-27 13132 Butte Graylodge Game Refuge Butte Sink Comment
  UC635237  Cuscuta subinclusa H. L. Mason 1930-10-25 5766 Monterey San Antonio River Santa Lucia Mountains Comment
  CAS-BOT-BC114782  Cyperus acuminatus Herbert L. Mason; Verne Grant 1946-8-6 12969 Colusa Pond 2.7 miles N of Colusa between Sacramento River and Butte Creek. Comment
  SEINET200026  Cyperus aristatus Herbert L. Mason 1946-7-27 12949 Lake Clear Lake 2-3 miles N of Lakeport. Comment
  CAS-BOT-BC114686  Cyperus bipartitus Herbert L. Mason 1946-7-4 12884 Sonoma Pitkin Marsh, between Santa Rosa and Forestville. Comment
  UC1100545  Cyperus difformis Herbert L. Mason 1945-9-18 12705 Sutter Sutter By-pass near bridge on Yuba City - Knight's Landing Hwy. Comment
  POM313105  Cyperus difformis H. L. Mason, S. Galen Smith 1948-8-17 8341 Fresno King s River east of Burrel, San Joaquin Valley Comment
  CAS-BOT-BC114448  Cyperus eragrostis Herbert L. Mason; Verne Grant 1946-8-21 13056 San Joaquin Between Banta and Stockton Comment
  UC1100530  Cyperus eragrostis Herbert L. Mason and Verne Grant 1946-8-28 13083 San Mateo at entrance to county prison San Francisco Comment
  UC1100531  Cyperus eragrostis Herbert L. Mason and Verne Grant 1946-8-21 13056 San Joaquin between Banta and Stockton Comment
  UC1100533  Cyperus eragrostis Herbert L. Mason and Verne Grant 1946-8-15 13049 Butte near caretaker's house Greylodge Game Refuge (#833 Irrigation Ditch); Butte Sink, Greylodge Game Refuge Comment
  UC1100538  Cyperus eragrostis Herbert L. Mason and Verne Grant 1945-7-10 12634 Butte n. of Marysville (marshes along Butte Creek, Butte Sink); Butte Sink, Grey Lodge Game Refuge Comment
  UC1100537  Cyperus eragrostis Herbert L. Mason 1945-8-17 12663 Solano n. Rio Vista Comment
  UC1099935  Cyperus erythrorhizos Herbert L. Mason and Verne Grant 1946-9-5 13115 Colusa 1.6 mi. w. Williams (rd. to Lake Co.) Comment
  UC1100413  Cyperus erythrorhizos Herbert L. Mason and Verne Grant 1946-8-14 13036 Butte canal near big pond by Sacramento Outing Club; Butte Sink Comment
  UC1100518  Cyperus erythrorhizos Herbert L. Mason 1945-9-19 12738 Butte Gray Lodge Game Refuge n.w. Pennington; Gray Lodge Game Refuge Comment
  UC1100667  Cyperus erythrorhizos Herbert L. Mason and S. Galen Smith 1948-8-18 8350 Kings canal just w. Stratford; San Joaquin Valley Comment
  UC1100668  Cyperus erythrorhizos Herbert L. Mason and S. Galen Smith 1948-8-10 8315 Merced Mendota Pool at entrance of Firebaugh canal (w. side); San Joaquin Valley Comment
  UC1100672  Cyperus erythrorhizos Herbert L. Mason and S. Galen Smith 1948-9-7 622 San Diego ca. 5 mi. s. Escondido (Lake Hodges); Lake Hodges Comment
  UC1100674  Cyperus erythrorhizos Herbert L. Mason and S. Galen Smith 1948-8-24 458 Kern flats ca. 2 mi. s. Karmin (ca. 3 mi. n. of Tupman); San Joaquin Valley, Elk Hills base, Kern R. Comment
  CAS-BOT-BC114270  Cyperus esculentus Herbert L. Mason; Stanley Galen [S. Galen] Smith 1948-7-28 8228 Fresno San Joaquin River at Firebaugh. Comment
  UC1100644  Cyperus niger Herbert L. Mason, Malcolm A. Nobs, and S. Galen Smith 1949-7-14 981 Fresno ca. 1 mi. s.e. Sanger (marsh n. of Kings River, on rd. to Sanger Beach) Comment
  UC1100636  Cyperus rotundus Herbert L. Mason and S. Galen Smith 1948-8-18 8349 Kings just w. of Stratford; San Joaquin Valley Comment
  UC1100552  Cyperus squarrosus Herbert L. Mason and S. Galen Smith 1948-8-17 8342 Fresno King's R. e. of Burrel; San Joaquin Valley, King's R. Comment
  UC1100559  Cyperus squarrosus Herbert L. Mason 1952-8-17 14495 Sierra 1 1/2 mi. e. Calpine (junction of Calpine and Sierraville, Beckworth Rd.); Sierra Valley Comment
  UC673566  Cypripedium montanum H. L. Mason 1925-8-11 2214 Tuolumne Bif Oak Flat road to Tuolumne Grove (along stream) Comment
  CAS-BOT-BC435170  Cypselea humifusa Herbert L. Mason 1945-8-24 12684 Lake East shore, Lower Lake Comment
  UCD96982  Cypselea humifusa Herbert L. Mason 1945-8-24 12684 Lake East shore, Lower Lake. Comment
  UC641978  Cystopteris fragilis H. L. Mason 1936-7-29 11439 Mono Conness Cirque near Saddlebag Lake (Tioga Pass region); Sierra Nevada Comment
  UC1051466  Dalea mollissima Herbert L. Mason 1952-4-9 14238 San Bernardino s. of Needles; Sawtooth Range Comment
  UC1100148  Damasonium californicum Herbert L. Mason, Malcolm A. Nobs, and S. Galen Smith 1949-5-29 755 Lassen on Great Northern R.R. <Nubeiber> (Hwy. 299) Comment
  UC1100156  Damasonium californicum Herbert L. Mason 1927-5-9 3705 Butte 15 mi. w. Oroville; Sacramento Valley Comment
  UCD138001  Damasonium californicum Herbert L. Mason 1946-5-30 12794 Lake Locomono Creek near Middletown. Comment
  UC634824  Darlingtonia californica Herbert L. Mason 1926-4-19 2887 Trinity Comment
  UC570854  Darmera peltata Herbert L. Mason 1923-7-20 626 Tuolumne near Ackerson Meadows; Middlefork Tuolumne River Comment
  UC912274  Deinandra corymbosa Herbert L. Mason 1932-4-28 7041 Monterey Pajaro Hills Comment
  UC691769  Deinandra kelloggii H. L. Mason 1929-3-29 5137 Contra Costa 2 mi above Clayton (Marsh Creek Road) Comment
  UC1179057  Delphinium Herbert L. Mason Jul 7 1939-Jul 8 1939 12147 Nevada 3 mi w Donner Summit 2072 Comment
  UC1191432  Delphinium Herbert L. Mason 1948-7-18 13626 Siskiyou Grass Lake Comment
  POM270946  Delphinium cardinale H. L. Mason 1927-6-15 3788 Los Angeles San Gabriel River. Comment
  UC912677  Delphinium hansenii H. L. Mason 1926-5-28 3256 El Dorado Rose Springs Sierra Nevada Mts. Comment
  CAS-BOT-BC10257  Delphinium hansenii Herbert L. Mason 1938-7-7 11874 Tuolumne Ridge east of Swamp Lake, between Swamp Lake and Hetch Hetchy 1676 Comment
  UC1076557  Delphinium hansenii subsp. hansenii Herbert L. Mason 1938-7-7 11874 Tuolumne ridge e Swamp Lake (between lake and Hetch Hetchy); Sierra Nevada, Yosemite National Park 1676 Comment
  UC635363  Delphinium nudicaule H. L. Mason 1931-3-13 5814 Alameda Lake Chabot Comment
  UC965556  Delphinium nuttallianum Herbert L. Mason 1952-7-11 14331 Nevada rocky margin of quaking bog at head of meadow 1 mi w University of California Trout Laboratory; Sierra Nevada, Sage Hen Creek 1981 Comment
  UC912670  Delphinium parishii Herbert L. Mason 1926-4-27 3052 Los Angeles 30 mi w Victorville Comment
  UC635346  Delphinium patens H. L. Mason 1928-4-13 4330 Napa hills between Santa Rosa and Calistoga Comment
  CAS-BOT-BC16799  Delphinium polycladon Herbert L. Mason; L. W. Reinecke 1937-7-28 14822 Tuolumne Mary Lake 2895 Comment
  CAS-BOT-BC16909  Delphinium pratense Herbert L. Mason 1936-7-6 11149 Mariposa Hetch Hetchy Trail west of Yosemite Creek 2377 Comment
  UC581135  Delphinium purpusii H. L. Mason 1934-3-28 8003 Kern n-facing hillslope Kern River Canyon Comment
  UC770002  Delphinium variegatum subsp. variegatum Herbert L. Mason 1934-3-25 7949 Sacramento Keithly Ranch Sacramento Valley, Rio Linda Comment
  UC635446  Dendromecon rigida Herbert L. Mason 1925-4-12 1339 Marin Pipe line trail Mt. Tamalpais Comment
  UC1100296  Deschampsia cespitosa subsp. cespitosa Herbert L. Mason 1946-7-4 12885 Sonoma between Santa Rosa and Forestville (Pitkin Marsh); Pitkin Marsh Comment
  UC1102968  Deschampsia danthonioides Herbert L. Mason 1958-8-9 14890 Tuolumne w. of Hetch Hetchy Dam (Swamp Lake area); Sierra Nevada, Yosemite Nat'l Park, Swamp Lake area 1584 Comment
  UC1083122  Dicentra chrysantha Herbert L. Mason 1936-5-15 11115 Mariposa between Coulterville Bagby (summit of road) Comment
  SEINET7293087 Image available Dichanthelium acuminatum subsp. fasciculatum Herbert L. Mason, S. Galen Smith 1949-1 8372 Merced San Joaquin river, bridge below Snelling Comment
  UC770000  Dichelostemma capitatum Herbert L. Mason 1934-3-25 7952 Sacramento Keithly ranch, Rio Linda Sacramento Valley, Rio Linda Comment
  UC635232  Dichelostemma capitatum H. L. Mason 1925-1-18 1182 Marin San Rafael to Forbes Comment
  UC635734  Dichelostemma ida-maia H. L. Mason 1928-7-20 4909 Humboldt South Fork Mountain Comment
  POM313166  Digitaria sanguinalis H. L. Mason 1945-9-19 12722 b Colusa Below causway over Butte Sink spillway, east bank of Sacramento River, 1 mile north of Colusa. Comment
  CAS-BOT-BC150304  Diplacus aurantiacus H. L. Mason 1921-5-14 s.n. Alameda [Haywards] Hayward Comment
  CAS-BOT-BC150525  Diplacus linearis H. L. Mason 1921-5-7 s.n. Monterey Carmel River, Rancho Del Monte Comment
  CAS-BOT-BC153937  Diplacus pulchellus C. T. Mason, Jr. 1954-6-7 1546 Tuolumne East of Carnegie Institution Camp, Hog Ranch, Mather 1371 Comment
  UC672121  Disporum hookeri Herbert L. Mason July, 1924 1100 Tuolumne Mather, Middle Fork of the Tuolumne River Middle Fork Tuolumne River; Mather, Middle Fork Tuolumne River Comment
  CAS-BOT-BC195649  Distichlis spicata Herbert L. Mason 1948-9-4 13639 Mono Rush Creek, Mono Lake Comment
  UC673300  Dithyrea californica Herbert L. Mason 1926-4-27 3065 Los Angeles 30 mi w Victorville; Mohave Desert Comment
  UC1178844  Dodecatheon alpinum H. L. Mason 1922-7-24 332 Mariposa Porcupine Flat Sierra Nevada Mountains, Yosemite National Park Comment
  UC1191155  Dodecatheon alpinum H. L. Mason 1923-7-28 667 Mariposa Snow Flat Sierra Nevada Mountains, Yosemite National Park Comment
  UC1199852  Dodecatheon alpinum Herbert L. Mason 1923-8-9 745 Tuolumne Gaylor Lakes, steam bed below second Lakes Comment
  UC673354  Dodecatheon alpinum Herbert L. Mason 1923-7-28 655 a Tuolumne White Wolf Sierra Nevada Mountains, Yosemite Natl Park, White Wolf (Yosemite National Park) Comment
  UC1039559  Dodecatheon clevelandii subsp. patulum Herbert L. Mason 1927-3-11 3651 San Francisco Bernal Heights San Francisco, Bernal Heights Comment
  UC673501  Dodecatheon clevelandii subsp. patulum Herbert L. Mason 1929-3-15 5056 Contra Costa summit of hill e Nortonville; e of Nortonville Comment
  UC1039537  Dodecatheon clevelandii subsp. sanctarum Herbert L. Mason 1929-3-1 5016 Monterey twenty-five mi up river along the Jamesburg-Arroyo Seco Road along the Jamesburg-Arroyo Seco road Comment
  UC1039589  Dodecatheon hendersonii Herbert L. Mason 1925-1-23 1206 Napa Wooden Valley grade Comment
  UC673395  Dodecatheon hendersonii Herbert L. Mason 1925-2-1 1229 Marin Lake Lagunitas Comment
  UC673398  Dodecatheon hendersonii Herbert L. Mason 1925-2-1 1215 Marin near Mount Tamalpais (above Mill Valley); near Mount Tamalpais, above Mill Valley Comment
  UC673404  Dodecatheon hendersonii Herbert L. Mason 1929-4-29 5254 Lake between Kelseyville and Lower Lake; between Kelseyville and Lower Lake Comment
  UC1039584  Dodecatheon hendersonii Herbert L. Mason 1925-3-23 1303 Alameda hills near Sunol; hills near Sunol Comment
  UC1178842  Dodecatheon hendersonii Herbert L. Mason 1926-3-14 2717 Napa sw slope Mt. St. Helena Comment
  UC673400  Dodecatheon hendersonii Herbert L. Mason 1925-3-23 1305 Alameda Sunol; Niles Canyon, Sunol Comment
  UC673402  Dodecatheon hendersonii Herbert L. Mason 1925-3-7 1283 Alameda Sunol , Sunol (Niles Canyon) Comment
  UC1014776  Dodecatheon jeffreyi H. L. Mason 1923-8-1 685 Tuolumne along trail from Tuolumne Meadows to Elizabeth Lake (Yosemite National Park); Sierra Nevada Mountains, Yosemite National Park Comment
  CAS-BOT-BC129998  Dodecatheon subalpinum H. L. Mason 1928-7-3 4867 Mariposa Yosemite Creek drainage, Tioga Road, head of Yosemite Creek grade, Yosemite National Park Comment
  UC1111590  Dodecatheon subalpinum Herbert L. Mason 1941-7-9 12516 Madera ridge w Moraine Meadows (Sierra Nevada); , Yosemite National Park 2682 Comment
  SEINET190352  Dodecatheon subalpinum H. L. Mason 1928-7-3 4867 Mariposa Yosemite National Park; Yosemite Creek drainage, Tioga Road, head of Yosmite Creek grade. Comment
  UC1039533  Dodecatheon subalpinum Herbert L. Mason 1923-7-28 657 Tuolumne Tioga Road between Yosemite Creek bridge and Porcupine Flat; Yosemite National Park, btw Yosemite Crk bridge and Porcupin Comment
  JEPS3589  Downingia bacigalupii Herbert L. Mason 1952-7-17 14384 Sierra 1.5 mi e Calpine (at junction of Calpine with Sierraville-Beckwourth road); Sierra Nevada, Sierra Valley 1524 Comment
  POM311107  Downingia bacigalupii H. L. Mason 1952-7-17 14384 Sierra 1.5 miles E of Calpine at junction of Calpine with Sierraville-Beckwourth road; Sierra Valley; Sierra Nevada. 1524 Comment
  UC965519  Downingia bacigalupii Herbert L. Mason 1952-6-17 14384 Sierra 1.5 mi e Calpine (at junction of Calpine with Sierraville-Beckwourth road); Sierra Nevada, Sierra Valley 1524 Comment
  UC1192032  Downingia bicornuta var. bicornuta Herbert L. Mason and Verne Grant 1947-7-12 13412 Modoc s of Alturas (w side of Pit River Valley); Pit River Valley 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
  UC912373  Downingia cuspidata Herbert L. Mason 1934-5-5 8120 Lake sw of Mount Konocti Comment
  UC635658  Downingia montana H. L. Mason 1922-7-19 315 Tuolumne Mather Sierra Nevada Mountains, Yosemite National Park 1432 Comment
  UC1025282  Draba breweri Herbert L. Mason 1936-7-24 11336 A Tuolumne White Mountain Sierra Nevada, Conness Range Comment
  UC1025284  Draba oligosperma var. oligosperma Herbert L. Mason 1936-7-24 11336 C Tuolumne slopes of White Mountain Sierra Nevada, Conness Range Comment
  SEINET6647416  Drosera rotundifolia H. L. Mason, L. W. Reinecke 1937-7-22 11578 Tuolumne Yosemite National Park, Swamp Lake, just south of Miguel Meadaows in the hills just west of Hetch Hetchy. 1585 Comment
  CAS-BOT-BC157757  Drymocallis glandulosa var. glandulosa H. L. Mason 1921-5-7 s.n. Monterey Rancho del Monte, Carmel River Comment
  UC673311  Drymocallis glandulosa var. reflexa Herbert L. Mason 1927-6-15 3783 San Bernardino cirque s Mount Baldy (headwaters of San Antonio River); San Gabriel Mountains, headwaters San Antonio River 2743 Comment
  UC673313  Drymocallis glandulosa var. wrangelliana Herbert L. Mason 1924-4-20 904 Alameda Berkeley Hills Berkeley Hills (w facing slopes) Comment
  SEINET11753105  Dulichium arundinaceum H. L. Mason 1958-1 14848 Tuolumne Sierra Nevada, Yosemite National Park, Swamp Lake, W of Hetch Hetchy Dam 1585 Comment
  NY31175  Eatonella congdonii H. L. Mason 1935-4-30 9315 Kern 5 miles west of Bakersfield Comment
  UC1100269  Echinochloa crus-galli Herbert L. Mason and S. Galen Smith 1948-8-19 8387 Merced 1 mi w Snelling Comment
  UC1100140  Echinodorus berteroi Herbert L. Mason and Verne Grant 1946-8-6 12971 Colusa pond 2.7 mi. n. of Colusa (between Sacramento R. and Butte Creek) Comment
  UC1192122  Eclipta prostrata Herbert L. Mason and Verne Grant 1946-8-7 12985 Colusa 8 mi n Colusa; Butte Sink Comment
  UCD131244  Eclipta prostrata H. L. Mason 1945-9-19 12725 Colusa 1 mile N of Colusa. Below causeway over Butte Sink spillway, E bank of Sacramento River. Comment
  UC629704  Egeria densa H. L. Mason 1938-8-26 12075 San Joaquin sw of Holt (Trapper Slough); Robert's Island 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
  POM257232  Egeria densa H. L. Mason 1938-8-26 12075 San Joaquin Trapper Slough, Robert s Island, southwest of Holt. Comment
  RSA366704  Egeria densa H. L. Mason 1938-8-26 12075 San Joaquin Trapper Slough, Robert s Island, southwest of Holt. Comment
  UC1100979  Eichhornia crassipes Herbert L. Mason, S. Galen Smith 1948-8-9 8300 Merced 1 mi w of Los Banos Comment
  UC1101530  Elatine brachysperma Herbert L. Mason 1936-7-15 12757 Tuolumne 0.5 mi w Mather; Sierra Nevada Comment
  POM312316  Elatine brachysperma H. L. Mason 1923-7-15 608 Tuolumne Plants growing in very wet soil, and in shallow water, salt Log Meadow, 2 miles W of Mather Comment
  UC1101537  Elatine californica Herbert L. Mason 1936-9-20 11535 Lake base of trail; sheep corral to Snow Mt. Comment
  UC1101552  Elatine heterandra Herbert L. Mason 1945-6-29 12625 Lake Boggs Lake base of Mt, Hanna Comment
  UC1111019  Elatine heterandra Herbert L. Mason 1937-5-27 11554 b Lake s side Mt. Konocti Comment
  POM312322  Elatine obovata H. L. Mason 1936-7-15 12757 Tuolumne 0.5 mile west of Mather, Sierra Nevada. Comment
  CAS-BOT-BC113609  Eleocharis acicularis Herbert L. Mason; Stanley Galen [S. Galen] Smith 1948-7-9 63 Merced Los Banos Wildlife Refuge, 1.5 mi N of Los Banos. Comment
  POM313056  Eleocharis acicularis var. acicularis H. L. Mason, S. Galen Smith 1948-8-11 8329 Merced Gustine Gun Club, 3 miles east of Gustine, San Joaquin Valley Comment
  CAS-BOT-BC113544  Eleocharis bella Herbert L. Mason 1938-7-11 11930 Tuolumne Miguel Meadows; west of Hetch Hetchy. 1584 Comment
  UC1111583  Eleocharis bella Herbert L. Mason 1940-7-6 12313 Tuolumne W of Hetch Hetchy (Miguel Meadows); Yosemite National Park 1584 Comment
  YM-YOSE65582  Eleocharis engelmannii H. L. Mason 1938-7-11 11931 Tuolumne MIGUEL MEADOWS. SWAMP LAKE RESEARCH RESERVE Comment
  UC1100602  Eleocharis engelmannii var. detonsa Herbert L. Mason 1947-8-13 13525 Modoc N of Canby, NE side of F reservoir Comment
  CAS-BOT-BC113408  Eleocharis flavescens var. flavescens Herbert L. Mason; Stanley Galen [S. Galen] Smith 1948-8-19 8376 Merced San Joaquin River, bridge below Snelling. Comment
  CAS-BOT-BC112754  Eleocharis macrostachya Herbert L. Mason; Verne Grant 1946-8-6 12956 -B Colusa Pond on Colusa/Marysville Hwy, 4 mi S of Colusa, W side of Sacramento River. Comment
  CAS-BOT-BC112807  Eleocharis macrostachya Herbert L. Mason 1946-7-27 12947 Lake Clear Lake, 2-3 miles north of Lakeport. Comment
  UC1100735  Eleocharis macrostachya Herbert L. Mason 1948-9-4 13659 Mono Mono Lake, Rush Creek Comment
  UC1100741  Eleocharis macrostachya Herbert L. Mason 1946-7-27 12947 Lake 2-3 mi N of Lakeport (Clear Lake) Comment
  UC1100743  Eleocharis macrostachya Herbert L. Mason 1947-8-15 13560 Modoc spring leading into W side of Goose Lake, 11 mi from Davis Creek Comment
  SEINET190351  Eleocharis obtusa Herbert L. Mason 1939-7-13 12142 Tuolumne Yosemite National Park ; In gravel pit Miguel Meadow west of Hetch Hetchy. 1585 Comment
  POM313071  Eleocharis palustris H. L. Mason 1946-7-27 12947 Lake Clear Lake, 2-3 miles north of Lakeport. Comment
  POM313062  Eleocharis parishii H. L. Mason 1948-9-2 13628 Kern Walker Pass Comment
  CAS-BOT-BC113224  Eleocharis parishii Herbert L. Mason 1948-9-2 13629 Kern Wet meadow, Walker Pass Comment
  UC1100128  Elodea canadensis Herbert L. Mason and S. Galen Smith 1948-8-11 8324 Merced about 5 mi w Merced (Black Rascal Creek); San Joaquin Valley Comment
  CAS-BOT-BC451524  Elodea canadensis Herbert L. Mason 1948-6-29 13589 Merced Delta road, 3 miles east of Los Banos [Banos] Comment
  UCD61430  Elymus elymoides H. L. Mason 1936-7-23 11313 Tuolumne Mt. Conness, Yosemite Natl. Park. Comment
  UC1178980  Emmenanthe penduliflora Herbert L. Mason 1946-5-30 12810 Lake East of Indian Valley, North Fork of Cache Creek 548 Comment
  UC672377  Emmenanthe penduliflora Herbert L. Mason 1926-4-26 2956 Fresno 4 miles west of Sanger Comment
  UC1083315  Ephedra viridis H. L. Mason 1926-4-26 2960 a Los Angeles 4 mi w of Sanger Comment
Read comments
Jul 31 2014
  UC1191621  Epilobium campestre Herbert L. Mason 1947-8-13 13519 Modoc n Canby (ne side of F reservoir); F reservoir Comment
  UC1191716  Epilobium ciliatum subsp. ciliatum Herbert L. Mason 1947-8-13 13522 Modoc ne side F Reservoir (n of Canby) Comment
  UC1191615  Epilobium densiflorum Herbert L. Mason 1947-8-11 13495 Modoc on Hwy 81 near boundary between Lassen and Modoc Counties (w margin of lake); Lower Lake Comment
  UC635384  Epilobium obcordatum H. L. Mason 1923-9-19 784 Tuolumne upper lake Sierra Nevada Mountains, Yosemite National Park, Gaylor Lake (near Tioga Mines) Comment
  POM256455  Epilobium obcordatum H. L. Mason 1923-9-15 784 Tuolumne Sierra Nevada, Yosemite National Park: Upper Lake, Gaylor Lakes, near Tioga Mine Comment
  CAS-BOT-BC190929  Epilobium pallidum Herbert Louis Mason; Verne Grant 1947-7-13 13441 Modoc Joseph Creek on Hwy 395. Comment
  CAS-BOT-BC190939  Epilobium pallidum Herbert Louis Mason; Verne Grant 1947-7-13 13441 Modoc Joseph Creek on Hwy 395. Comment
  CAS-BOT-BC190868  Epilobium pygmaeum Herbert Louis Mason 1947-8-15 13563 Modoc W side of Goose Lake 11 mi. from Davis Creek. Comment
  UC1076343  Equisetum X ferrissii Herbert L. Mason 1930-10-25 5744 Monterey headwaters of Arroyo Seco; Santa Lucia Mts. Comment
  UC912688  Equisetum X ferrissii Herbert L. Mason 1936-7-12 11212 Mariposa Yosemite Valley; Yosemite Valley, Merced River Comment
  UC1195928  Equisetum arvense Herbert L. Mason 1958-8-9 14864 Tuolumne w Hetch Hetchy Dam (Swamp Lake meadow); Sierra Nevada, Yosemite Nat'l Park 1584 Comment
  POM312960  Equisetum laevigatum H. L. Mason 1953-7-7 14557 Sierra N of Sattley, Sierra Valley. Comment
  UC1076465  Equisetum telmateia subsp. braunii Herbert L. Mason 1926-3-17 2741 Alameda Strawberry Canyon Berkeley Comment
  UC1100247  Eragrostis hypnoides Herbert L. Mason 1946-7-27 12951 Lake Clear Lake 2-3 mi n Lakeport; Clear Lake Comment
  UC1100248  Eragrostis hypnoides Herbert L. Mason 1945-9-19 12717 Colusa 1 mi above Colusa (below causeway over Butte Sink spillway); e bank of Sacramento River, Butte Sink spillway Comment
  CAS-BOT-BC168400  Eremogone kingii Herbert L. Mason 1938-7-26 12019 Tuolumne Andrews Peak, south of Jack Main Meadows - Yosemite National Park, Sierra Nevada 2438 Comment
  UC908537  Eriastrum abramsii Herbert L. Mason 1945-6-28 12606 Lake 2.5 mi s Kelseyville Comment
  UC908776  Eriastrum abramsii Herbert L. Mason 1935-5-9 8313 Santa Clara divide between Colorado Creek and headwaters of Arroyo Mocho 838 Comment
  CAS-BOT-BC512631  Eriastrum abramsii Herbert L. Mason; H. K. Sharsmith 1935-5-3 8302 Santa Clara Above Bayo Creek, Mount Hamilton Range 609 Comment
  UC971719 Image available Eriastrum brandegeeae H. L. Mason 1945-6-28 12604 Lake se Borax Lake; Obsidian Ridge; Obsidian Ridge, SE of Borax Lake, Lake Co. Comment
  RSA0004735  Eriastrum brandegeeae H. L. Mason 1945-6-28 12604 Lake Obsidian Ridge, southeast of Borax Lake Comment
  SEINET13094911  Eriastrum brandegeeae H. L. Mason 1945-6-28 12604 Lake Obsidian Ridge, southeast of Borax Lake. Comment
  CAS-BOT-BC512646  Eriastrum densifolium subsp. austromontanum Herbert L. Mason 1948-9-3 13631 a Inyo Onion Valley Comment
  UC665609  Eriastrum pluriflorum Herbert L. Mason 1941-7-3 12489 Santa Barbara 14 mi w Maricopa; head of Cuyama Valley 762 Comment
Read comments
Apr 29 2014
  UC908090  Eriastrum pluriflorum Herbert L. Mason 1935-4-30 8279 San Bernardino sw Trona; Mohave Desert, Poison Canyon Comment
  UC908868  Eriastrum pluriflorum Herbert L. Mason 1933-6-10 7252 Contra Costa Brentwood Comment
  SBBG29124  Eriastrum pluriflorum H. L. Mason 1941-7-3 12489 San Luis Obispo head of Cuyama Valley, 14 mi W of Maricopa 762 Comment
  CAS-BOT-BC188011  Eriastrum virgatum Herbert L. Mason 1923-6-23 541 Monterey Carmel River, 10 miles above Carmel, near schoolhouse Comment
  UC908456  Eriastrum virgatum Herbert L. Mason 1923-6-23 541 Monterey 10 mi above Carmel (steep bluffs overlooking river, near school house); Carmel River Comment
  UC908869  Eriastrum virgatum Herbert L. Mason 541 Monterey along the Carmel River Carmel Valley Comment
  UC672265  Ericameria cooperi var. cooperi H. L. Mason 1926-4-27 3045 Los Angeles Big Pine Recreation Camp Road between Big Rock Creek and Little Rock Creek Comment
  POM247242  Ericameria ericoides var. ericoides H. L. Mason 1936-9-13 11525 Monterey Prunedale, 9 miles N of Salinas Comment
  UC672254  Ericameria linearifolia H. L. Mason 1926-3-7 2707 Contra Costa near summit Mount Diablo Comment
  UCD131476  Ericameria nauseosa var. oreophila Herbert L. Mason; Verne Grant 1947-7-12 13409 Modoc west side of the South Fork of Pit River Valley, southwest of Alturas. Comment
  UC1077098  Erigeron breweri var. breweri Herbert L. Mason 1938-7-7 11869 Tuolumne between Swamp Lake Hetch-Hetchy; Sierra Nevada, Yosemite National Park, Brecca Ridge 1981 Comment
  UC912503  Erigeron breweri var. breweri Herbert L. Mason 1932-9-9 7182 Alpine near Carson Pass; Carson Meadows Comment
  UC714411  Erigeron compositus Herbert L. Mason 1936-7-26 11388 Tuolumne moraine flat near Gaylor Lakes; Sierra Nevada 3048 Comment
  UC1101510  Erigeron divergens Herbert L. Mason and Verne Grant 1947-7-10 13340 Modoc 2 mi e Alturas; Dorris Reservoir Comment
  UC912499  Erigeron elmeri H. L. Mason 1923-8-4 709 Tuolumne Lamberts Dome Yosemite Nationa Park, Lamberts Dome Comment
  UC1077080  Erigeron foliosus var. foliosus Herbert L. Mason 1946-6-7 12826 Santa Barbara 0.5 mi w Camuesa Canyon Comment
  UC482963  Erigeron foliosus var. hartwegii H. L. Mason 1932-4-24 Amador between Ione and Latrobe (Dry Creek Bridge); Dry Creek Comment
  CAS-BOT-BC300648  Erigeron foliosus var. hartwegii Herbert L. Mason 1932-4-24 s.n. El Dorado Dry Creek Bridge, between Ione and Latrobe Comment
  JEPS21924  Erigeron linearis Herbert L. Mason 1923-8-9 743 Tuolumne ridge e of 2nd Gaylor Lake (near Tioga Mines); Yosemite National Park 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
  UC712512  Erigeron pygmaeus Herbert L. Mason 1936-7-31 11467 Mono e of Saddlebag Lake; Sierra Nevada, Tioga Crest 3474 Comment
  UC672374  Eriodictyon californicum Herbert L. Mason 1925-4-12 1336 Marin Mt. Tamalpais; Pipe Line Trail Comment
  SD45359  Eriodictyon capitatum Herbert L. Mason 1947-5-2 13208 Santa Barbara Purissima Hills, Pine Canyon Comment
  UC735025  Eriodictyon capitatum Herbert L. Mason 1947-5-2 13208 Santa Barbara Purissima Hills Pine Canyon; , Pine Canyon Comment
  UC635081  Eriogonum angulosum Herbert L. Mason 1926-4-26 2996 Los Angeles 1 mi e Palmdale; Mohave Desert Comment
  CAS-BOT-BC248527  Eriogonum angulosum H. L. Mason 1930-4-20 s.n. San Benito 14 miles south of Hollister Comment
  CAS-BOT-BC248728  Eriogonum arborescens Herbert L. Mason 1927-9-24 4095 Santa Barbara Near West Willow Creek, Santa Cruz Island Comment
  SEINET3836444 Image available Eriogonum arborescens Herbert L. Mason 1927-9-23 4084 Santa Barbara Prisoners Harbor, Santa Cruz Island Comment
  CAS-BOT-BC248837  Eriogonum compositum var. compositum H. L. Mason 1931-5-9 5865 Siskiyou Shasta Creek Comment
  UC635009  Eriogonum compositum var. compositum H. L. Mason 1929-5-18 5327 Siskiyou hills along Shasta Creek Canyon Shasta Creek Canyon Comment
  UC634525  Eriogonum fasciculatum var. foliolosum H. L. Mason 1923-6-15 381 Santa Barbara Harris Grade between Harris and Lompoc; La Purisima Ridge, Harris Grade Comment
  UC634991  Eriogonum fasciculatum var. foliolosum Herbert L. Mason 1923-6-22 528 San Luis Obispo near San Luis Obispo; Camp Fremont Comment
  UC1076551  Eriogonum gracile Herbert L. Mason 1936-9-13 11530 Santa Clara w Madrone Station Comment
  UC635433  Eriogonum gracile H. L. Mason September, 1930 5910 Monterey low hills at upper end of Elkhorn Slough between Watsonville and Castroville; Elkhorn Slough Comment
  UC635083  Eriogonum inflatum var. inflatum Herbert L. Mason 1926-4-28 3093 San Bernardino Box S Springs Mohave Desert, Box S Springs Comment
  UC1093645  Eriogonum luteolum var. luteolum Herbert L. Mason 1946-7-4 12899 Sonoma 2 mi e Occidental Comment
  UC634591  Eriogonum luteolum var. pedunculatum H. L. Mason 1929-10-4 5454 Placer 2.4 mi below Weimar Comment
  CAS-BOT-BC261383  Eriogonum nudum var. deductum Herbert L. Mason 1925-7-29 2181 Tuolumne Mather Comment
  UC635076  Eriogonum nudum var. deductum Herbert L. Mason 1925-7-29 2181 Tuolumne Mather Comment
  UC641820  Eriogonum ovalifolium var. nivale H. L. Mason 1936-7-24 11327 Tuolumne White Mountain Sierra Nevada, Mount Conness Range, White Mountain Comment
  UC641822  Eriogonum ovalifolium var. nivale H. L. Mason 1936-7-31 11465 Mono e Saddlebag Lake (Tioga Crest); Sierra Nevada, Tioga Crest Comment
  UC641993  Eriogonum ovalifolium var. nivale H. L. Mason 1936-7-23 11285 Tuolumne alpine slopes of Mount Conness Sierra Nevada, Mount Conness Comment
  UC642010  Eriogonum ovalifolium var. nivale H. L. Mason 1936-7-28 11411 Mono vicinity Mount Dana (Dana Plateau); Sierra Nevada, Dana Plateau 3657 Comment
  POM256509  Eriogonum parvifolium var. parvifolium H. L. Mason, Edward Lee 1934-10 9062 Monterey Point Lobos State Park Comment
  UC635807  Eriogonum pusillum Herbert L. Mason 1926-4-26 3012 Los Angeles near Rock Creek; Mohave Desert Comment
  SEINET3405321 Image available Eriogonum roseum Herbert L. Mason 1934-9-8 Monterey 3 mi SE of "The Indians" San Antonio River 549 Comment
  UC634593  Eriogonum roseum H. L. Mason 1930-10-25 5776 Monterey along San Antonio River between Jolon and Santa Lucia Ranger Station; Santa Lucia Mountains, San Antonio River Comment
  UC635008  Eriogonum spergulinum var. spergulinum H. L. Mason 1928-7-4 4871 Tuolumne Tuolumne Meadows Comment
  CAS-BOT-BC267797  Eriogonum umbellatum var. furcosum Herbert L. Mason 1925-7-27 2179 Tuolumne Mathes Comment
  UC634993  Eriogonum umbellatum var. nevadense Herbert L. Mason 1924-6-18 1051 Plumas Graeagle Comment
  UC635516  Eriogonum ursinum Herbert L. Mason 1924-6-18 1055 Plumas near summit of road between Graeagle and Gold Lake Comment
  UC1178885  Eriophorum crinigerum Herbert L. Mason 1941-7-7 12509 Madera sphagnum bog just s. of Givens Lake trail junction Givens Lake; Sierra Nevada, Yosemite Nat'l Park 2865 Comment
  GH424386  Eriophorum gracile H. L. Mason 1938-7-10 11913 Unknown South island in Swamp Lake, west of Hetch Hetchy 1584 Comment
  UCD49878  Eriophorum gracile Herbert L. Mason; Lawrence W. Reinecke 1937-7-22 11579 Tuolumne Swamp Lakes, just south of Miguel Meadows, east of Hetch Hetchy dam. Comment
  UC1199818  Eriophyllum confertiflorum var. confertiflorum Herbert L. Mason 1940-5-20 12287 Marin back of Tiburon Comment
  UC566761  Eriophyllum confertiflorum var. confertiflorum H. L. Mason 1932-4-28 7043 Monterey Pajero Hills Pajaro Hills Comment
  UC566763  Eriophyllum confertiflorum var. confertiflorum H. L. Mason 1923-6-19 515 Ventura Horn Canyon Comment
  UC632870  Eriophyllum confertiflorum var. confertiflorum H. L. Mason 1936-7-6 11136 Mariposa Yosemite Falls Trail Yosemite National Park, Yosemite Falls Trail Comment
  GH427091  Eriophyllum jepsonii H. L. Mason 1935-5-8 10008 Unknown Patterson Road, twenty miles from mouth of Arroyo del Puerto, Mount Hamilton Range 533 Comment
  UC912251  Eriophyllum lanatum var. arachnoideum Herbert L. Mason 1934-4-28 8096 Sonoma Dohrman Creek Comment
  UC566756  Eriophyllum lanatum var. grandiflorum H. L. Mason 1932-4-24 6976 Calaveras Mokulumne River Bridge Comanche, Mokulumne River Bridge Comment
  UC566746  Eriophyllum pringlei H. L. Mason 1926-4-26 2997 Los Angeles 1 mi e Palmdale Comment
  UC769998  Erodium botrys Herbert L. Mason 1934-3-25 7954 Sacramento Rio Linda, Keithly ranch Sacramento Valley Comment
  SFV16503  Erodium moschatum S. Mason, H. M. Mason 1993-3-21 34 Los Angeles San Fernando Valley Los Angeles, Sepulveda. Backyard of 9629 Langdon Ave. 267 Comment
  UC566784  Eryngium armatum Herbert L. Mason 1927-7-30 3986 Monterey Cypress Point Comment
  UC1191956  Eryngium racemosum Herbert L. Mason and S. Galen Smith 1948-8-17 8338 Stanislaus ca. 2 mi. e. Westley (near Grayson) Comment
  UC1081568  Erysimum capitatum Herbert L. Mason 1936-4-11 11060 Calaveras s Sheep Ranch; San Antonio Creek Comment
  UCD114980  Erysimum capitatum Steve Mason 1993-5-1 26 Los Angeles on Sulfur Springs Road, 200 feet off Angeles Crest Highway on right roadcut. 1798 Comment
  UC673520  Erysimum capitatum H. L. Mason 1926-3-14 2725 Napa Mount St. Helena 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
  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
  RSA518826  Erysimum capitatum var. capitatum H. L. Mason 1932-3-20 s.n. Alameda 2 mi E of Midway. Comment
  UC1077093  Erysimum perenne Herbert L. Mason 1938-7-28 12033 Tuolumne e Tilden Lake; Sierra Nevada, Yosemite National Park, Macomb Ridge 3048 Comment
  UC1191426  Erysimum repandum Herbert L. Mason 1947-7-10 13346 Modoc 2 mi e Alturas; Dorris Reservoir Comment
  UC1077102  Erythranthe grayi Herbert L. Mason 1938-7-16 11953 Madera 4 mi s Miami Ranger Station; Sierra Nevada 1219 Comment
  CAS-BOT-BC151530  Erythranthe laciniata Herbert L. Mason 1938-7-25 12004 Tuolumne Deep Lake, south base of Mahan Peak, Jack Main Canyon - Sierra Nevada, Yosemite National Park 2438 Comment
  UC1083341  Erythronium hendersonii Herbert L. Mason 1931-5-9 5861 a Siskiyou Siskiyou Summit Comment
  UC635480  Eschscholzia californica H. L. Mason 1924-11-15 1157 Marin Willow Camp Bolinas Bay Comment
  CAS-BOT-BC402950  Eschscholzia californica H. L. Mason 1917-3-10 50 Alameda Lake Temescal Comment
  CAS-BOT-BC403545  Eschscholzia californica H. L. Mason 1922-3-26 s.n. San Mateo Mouth of Gazos Creek Comment
  CAS-BOT-BC403654  Eschscholzia californica H. L. Mason 1922-3-26 s.n. Santa Cruz Between Davenport and Scott Creek Valley Comment
  CAS-BOT-BC419524  Eschscholzia lobbii H. L. Mason 1929-3-24 5099 Madera Eighteen miles east of Madera at junction of Yosemite Road Comment
  UC635605  Eschscholzia lobbii H. L. Mason 1929-3-24 5099 Madera 18 mi e Madera (at junction of Yosemite Rd) Comment
  UC635608  Eschscholzia parishii H. L. Mason 1928-3-10 4244 a Riverside road from Indio to Palm Springs Comment
  UC635609  Eschscholzia parishii H. L. Mason 1928-3-10 4191 Riverside Whitewater River Comment
  UC592185  Eucrypta chrysanthemifolia var. chrysanthemifolia H. L. Mason 1925-3-10 1292 Contra Costa Mount Diablo Comment
  RSA114066  Eucrypta micrantha H. L. Mason 1952-4-11 14253 San Bernardino Black lavas north of Pisgah Crater. Comment
  UC635616  Euonymus occidentalis var. occidentalis H. L. Mason 1924-5-18 1016 San Mateo Jasper Ridge near Stanford (creek below sand hill caves); Jasper Ridge Comment
Read comments
Sep 19 2011
  UC570797  Euphorbia crenulata H. L. Mason 1926-3-21 2768 Lake between Middletown and Mt. St. Helena Comment
  SD46096  Euphorbia eriantha Herbert L. Mason 1952-4-9 14232 San Bernardino 10 miles south of Needles Comment
  UC570794  Euphorbia spathulata H. L. Mason 1932-4-17 6942 Santa Clara 1 mi e New Almaden (hill) Comment
  UC1110532  Festuca minutiflora Herbert L. Mason 1936-7-24 11335 Tuolumne White Mountain Sierra Nevada, Conness Range Comment
  SEINET190344  Filago gallica H. L. Mason 1932-4-28 7042 Monterey Pajaro Hills Comment
  UC566906  Forestiera pubescens H. L. Mason 1923-6-14 369 Monterey King City bridge over Salinas River; King City, Salinas River Comment
  GH425837  Frangula californica H. L. Mason 1930-10-25 5742 Unknown Headwaters of the Arroyo Seco, Santa Lucia Mountains Comment
  A378109  Frangula purshiana H. L. Mason 1924-6-19 1071 Unknown Along stream running north into Bear Lake Comment
  CAS-BOT-BC223661  Frankenia salina Herbert L. Mason 1945-8-17 12667 Solano 5 miles north of Rio Vista Comment
  GH376201  Frankenia salina H. L. Mason 1928-9-30 4967 Unknown San Joaquin Delta near Holt Comment
  GH376220  Frankenia salina H. L. Mason 1929-10-13 5503 Unknown 2-1/3 miles north of Cambria Comment
  GH401236  Fraxinus latifolia H. L. Mason 1928-5-3 4490 a Unknown Near Cosumnes River bridge at mouth of Clark Creek Comment
  A422632  Fremontodendron californicum H. L. Mason 1935-5-30 10009 Unknown Four miles north of Knoxville Mines Comment
  CAS-BOT-BC205893  Fremontodendron californicum Herbert L. Mason 1935-5-30 10009 Napa Four miles north of Knoxville Mines Comment
  UC1039636  Fremontodendron californicum Herbert L. Mason 1935-4-30 6274 Kern Onyx Comment
  UC672111  Fritillaria affinis Herbert L. Mason 1926-3-21 2776 Lake Middletown to Mount St. Helena (via Toll House Canyon) Comment
  UC672113  Fritillaria affinis Herbert L. Mason 1925-3-1 1268 San Francisco San Francisco, Bernal Heights Bernal Heights; San Francisco, Bernal Heights Comment
  CAS-BOT-BC130026  Fritillaria affinis H. L. Mason 1917-4-4 78 Marin Tocaloma Comment
  UC673373  Fritillaria biflora Herbert L. Mason 1934-3-31 8057 San Luis Obispo 6 mi n of Cambria Comment
  UC672098  Fritillaria recurva Herbert L. Mason 1926-3-14 2732 Napa e side of Mount St. Helena, Toll House Canyon Toll House Canyon; Mount St. Helena, Toll House Canyon Comment
  CAS-BOT-BC179876  Galeopsis tetrahit Herbert Louis Mason; Verne Grant 1947-7-12 13417 Modoc S end of W side road, Pit River Valley, S of Alturas. Comment
  UC1039517  Galium andrewsii subsp. andrewsii Herbert L. Mason 1930-6-1 5678 Lake St. Helena Creek Mt. St. Helena Comment
  UC1039513  Galium bifolium Herbert L. Mason 1925-8-11 2222 b Tuolumne Morraine Flat Tuolumne Meadows 2743 Comment
  UC1039510  Galium bolanderi H. L. Mason 1928-6-28 4863 Mariposa Wawona Comment
  UC1039518  Galium californicum subsp. californicum H. L. Mason 1932-4-28 7037 Monterey Pajaro Hills Comment
  UC964759  Galium murale Herbert L. Mason 1944-3-17 Contra Costa Briones Hills Comment
  YM-YOSE66571  Galium nuttallii Harry L. Mason 1938-7-10 11921 Tuolumne SWAMP LAKE, SOUTH SHORE 1554 Comment
  UCSB44754  Galium nuttallii subsp. nuttallii Mason, Renee 1980-6-5 Santa Barbara 1 mile up San Ysidro Canyon trail along shady, right side; San Ysidro Canyon at end of Park Lane 335 Comment
  UC1111587  Galium trifidum Herbert L. Mason 1941-10-19 12530 Mendocino Fort Bragg Comment
  UC1311814  Galium trifidum var. pusillum Herbert L. Mason 1939-8-2 12194 El Dorado near mouth of Upper Truckee River (s end of lake); Lake Tahoe Comment
  UC632791  Galium trifidum var. pusillum H. L. Mason 1936-7-12 11241 Mariposa Peregoy Meadow Yosemite National Park, Glacier Point Road 2255 Comment
  UC672195  Gamochaeta ustulata H. L. Mason 1932-4-26 7045 Monterey Pajaro Hills Comment
  UC634763  Garrya elliptica H. L. Mason 1929-9-1 5403 Mendocino 3 mi n Fort Bragg Comment
  UC634814  Garrya elliptica H. L. Mason 1932-8-26 7149 Mendocino 1.5 mi n Albion Comment
  CAS-BOT-BC186383  Garrya flavescens H. L. Mason 1927-6-14 3760 San Bernardino San Antonio Canyon, San Gabriel Mountains 1219 Comment
  UC634791  Garrya flavescens H. L. Mason 1926-4-11 2855 Alameda Cedar Mountain Mount Hamilton Range (and Rancho Repose) Comment
  UC634787  Garrya veatchii H. L. Mason 1927-6-14 3760 San Bernardino San Antonio Canyon; San Gabriel Mountains 1219 Comment
  UC1093945  Gaultheria humifusa Herbert L. Mason 1941-7-14 12520 Madera Yosemite National Park, Ottoway Lake Ottoway Lake; Sierra Nevada, Yosemite National Park, Ottoway Lake 2987 Comment
  UC634693  Gayophytum humile H. L. Mason 1934-5-5 8118 Lake sw Mount Konocti Comment
  UC1191623  Gayophytum racemosum Herbert L. Mason and Verne Grant 1947-7-9 13310 Modoc Cedar Pass Warner Range (summit of range) 1920 Comment
  UC1191760  Gayophytum racemosum Herbert L. Mason 1948-7-17 13603 Siskiyou Eastern Grass Lake Comment
  UC712444  Gentiana newberryi H. L. Mason 1936-7-24 11339 Tuolumne White Mountain Sierra Nevada, Mount Conness Range 3505 Comment
  POM312857  Gentiana sceptrum H. L. Mason 1946-7-4 12891 Sonoma Pitkin Marsh, between Santa Rosa and Forestville. Comment
  UC1077090  Geranium californicum Herbert L. Mason 1938-7-8 11884 Tuolumne w of Hetch Hetchy; Yosemite National Park, Miguel Meadows 1584 Comment
  UC571127  Geranium core-core H. L. Mason 1928-4-7 4276 Sonoma mouth of Russian River, Jenner Jenner; Russian River, Jenner Comment
  UC571136  Geranium dissectum H. L. Mason 1926-5-26 3243 Alameda Niles Canyon Comment
  UC555622  Geum macrophyllum H. L. Mason 1923-8-6 712 Tuolumne Island of Lyell Fork Comment
  UC909031  Gilia achilleifolia subsp. achilleifolia Herbert L. Mason 1924-4-20 902 Alameda along higher slopes of the Berkeley Hills Berkeley Hills Comment
  UC1250318  Gilia achilleifolia subsp. multicaulis Herbert L. Mason 1957-5-11 14737 San Benito Clear Creek Canyon 4.5 mi from Hernandez; South Coast Ranges, Clear Creek Canyon Comment
  UC908811  Gilia achilleifolia subsp. multicaulis Herbert L. Mason 1928-5-6 4561 Alameda Cedar Mountain Mount Hamilton Range, Cedar Mountain Comment
  UC908909  Gilia achilleifolia subsp. multicaulis Herbert L. Mason 1926-4-11 2822 Alameda Rancho Repose , Rancho Repose (Cedar Mt.) Comment
  UC908976  Gilia achilleifolia subsp. multicaulis Herbert L. Mason 1924-5-18 1019 Santa Clara foot of Searsville Dam Comment
  UC908835  Gilia aliquanta Herbert L. Mason 1926-4-26 2973 Los Angeles four mi s Vincent; Mint Canyon Highway, Soledad Pass Comment
  POM282929  Gilia angelensis C. T. Mason 1943-3-28 125 San Bernardino Mentone Ranch, Mentone. Comment
  UC908491  Gilia brecciarum subsp. neglecta Herbert L. Mason 1938-4-15 11724 San Bernardino along road between Johannesburg and Trona; Mohave Desert, btw Johannesburg and Trona Comment
  UC908804  Gilia brecciarum subsp. neglecta Herbert L. Mason 1935-4-30 8343 Kern Walker Pass Comment
  UC908509  Gilia cana subsp. speciosa Herbert L. Mason 1935-3-29 8212 San Bernardino Red Rock Canyon; Mohave Desert Comment
  SEINET12271312  Gilia capillaris H. L. Mason 1950-1 14049 Trinity Summit of grade, Scott Mountain Comment
  SEINET200250  Gilia capillaris Herbert L. Mason 1955-7-31 14643 Lassen Near Westwood Junction (railroad station 15mi west of Susanville) Comment
  UC908981  Gilia capitata subsp. abrotanifolia Herbert L. Mason 1938-5-8 11798 Santa Barbara vicinity of the summit Figueroa Mountain; vicin summit Figueroa Mountain Comment
  CAS-BOT-BC225293  Gilia capitata subsp. chamissonis Herbert Mason; Annetta Carter 1938-5-18 11840 Marin Point Reyes Peninsula, 12.5 miles from Inverness Comment
  POM257165  Gilia capitata subsp. chamissonis H. L. Mason, Annetta Carter 1938-5-18 11840 Marin Point Reyes Peninsula, 12.5 miles from Inverness. Comment
  UC908158  Gilia capitata subsp. pedemontana Herbert L. Mason 1926-5-24 3281 Nevada 5 mi s Grass Valley (Rattlesnake Creek); , s of Grass Valley 609 Comment
  UC908108  Gilia capitata subsp. staminea Herbert L. Mason 1929-3-31 5159 Contra Costa Antioch; San Joaquin River Comment
  UC908226  Gilia clivorum Herbert L. Mason 1935-3-24 8169 Alameda summit of grade between Livermore and Tesla; summit of grade btw Livermore and Tesla Comment
  UC909028  Gilia clivorum Herbert L. Mason 1932-4-28 7040 Monterey e Watsonville (Pajaro Hills); e of Watsonville, Pajaro Hills Comment
  UC909033  Gilia clivorum Herbert L. Mason 1929-3-29 5128 Contra Costa 2 mi e Clayton (Marsh Creek Road); e of Clayton Comment
  UC909029  Gilia clivorum Herbert L. Mason 1938-4-14 11700 Fresno outskirts w South Mendota; w of South Mendota Comment
  UC908484  Gilia diegensis Herbert L. Mason 1928-3-11 4252 Riverside Palm Springs Colorado Desert, Palm Springs Comment
  CAS-BOT-BC226218  Gilia interior Herbert L. Mason 1935-4-20 6268 Kern Hobo Hot Springs, Kern River Canyon Comment
  CAS-BOT-BC226220  Gilia interior Herbert L. Mason 1938-4-17 11732 Kern Three and one-half miles east of Hobo Hot Springs, Kern River Canyon Comment
  UC908384  Gilia interior Herbert L. Mason 1935-5-2 8385 Kern Piute Kern River Canyon drainage, Piute Comment
  UC908425  Gilia interior Herbert L. Mason 1934-3-28 8000 Kern Kern River Canyon Comment
  HSC16974  Gilia latiflora H. L. Mason 1935-3-29 8204 Kern 2 mi. W of Randsburg, Mojave Desert Comment
  CAS-BOT-BC225376  Gilia latiflora subsp. davyi Herbert L. Mason 1935-3-29 8195 San Bernardino Twelve miles west of Barstow, Mohave Desert Comment
  CAS-BOT-BC226346  Gilia latiflora subsp. davyi Herbert L. Mason 1926-4-27 3060 Los Angeles Thirty miles west of Victorville, Mohave [Mojave] Desert Comment
  CAS-BOT-BC226363  Gilia latiflora subsp. elongata Herbert L. Mason 1935-3-29 8202 Kern Two miles west of Randsburg, Mohave [Mojave] Desert Comment
  CAS-BOT-BC225410  Gilia latiflora subsp. latiflora Herbert L. Mason 1926-4-28 3109 San Bernardino Cajon Pass Comment
  UC1275782  Gilia lottiae Herbert L. Mason 1963-6-24 15219 Mono Paoha Island Mono Lake, Paoha Island Comment
  UC908130  Gilia minor Herbert L. Mason 1926-4-26 3005 Los Angeles Little Rock Mohave Desert, Little Rock Comment
  UC908134  Gilia minor Herbert L. Mason 1945-3-30 8245 Kern Lost Hills w Bakersfield; Lost Hills w of Bakersfield Comment
  UC908181  Gilia minor Herbert L. Mason 1935-3-30 8244 Kern fourteen mi w Bakersfield; w of Bakersfield Comment
  UC907870  Gilia modocensis Herbert L. Mason 1934-3-30 8034 Los Angeles s Valyermo (Rock Creek, n side of San Gabriel Mountains); San Gabriel Mountains, s of Valyermo Comment
  CAS-BOT-BC402109  Gilia ochroleuca Herbert L. Mason 1938-5-8 11795 Santa Barbara Vicinity of the summit of Figueroa Mountain Comment
  UC964726  Gilia ochroleuca subsp. bizonata H. L. Mason 1926-4-26 2967 Los Angeles Summit of First Grade Mint Canyon Road (Mint Canyon Road) Comment
  UC964781  Gilia ochroleuca subsp. bizonata Herbert L. Mason 1926-4-26 2967 Los Angeles Summit of 1st Grade, Mint Canyon Road Mint Canyon Road Comment
  UC964737  Gilia ochroleuca subsp. bizonata Herbert L. Mason 1926-4-27 3048 Los Angeles between Rock Creek and Little Rock Creek (along Los Angeles Co. Park Road, Mohave Desert); Mohave Desert, along Los Angeles Co. Park Road Comment
  CAS-BOT-BC407619  Gilia ochroleuca subsp. exilis Herbert L. Mason 1926-4-30 3112 Riverside Temecula Canyon, 1 mile S of Temecula Comment
  CAS-BOT-BC401927  Gilia ochroleuca subsp. ochroleuca Herbert L. Mason 1934-3-30 8029 Inyo Summit of pass, Panamint Mountains Comment
  UC908026  Gilia ochroleuca subsp. ochroleuca Herbert L. Mason 1932-4-1 6874 Kern road from Roosevelt to Muroc; Mohave Desert Comment
  UC908480  Gilia ochroleuca subsp. ochroleuca Herbert L. Mason 1935-3-29 8215 San Bernardino three mi n Johannesburg (on road to Searles Lake, Mohave Desert); Mohave Desert, n of Johannesburg Comment
  UC908899  Gilia ochroleuca subsp. vivida Herbert L. Mason 1927-6-15 3774 San Bernardino slopes of Mount San Antonio (Old Baldy) , slopes Mount San Antonio (San Gabriel Mountains) 2438 Comment
  UC908865  Gilia scopulorum H. L. Mason 1940-3-22 12243 Inyo 4 mi e Victorville (Titus Canyon, Grapevine Mountains); Death Valley National Monument, Grapevine Mountains 883 Comment
  POM310924  Gilia sinuata H. L. Mason 1935-3-29 8203 Kern 2 miles west of Randsburg Comment
  SD45384  Gilia sinuata Herbert L. Mason 1935-3-29 8203 Kern 2.0 miles west of Randsburg. Comment
  SEINET12532322  Gilia tenuiflora subsp. arenaria Herbert L. Mason 1933-1 Monterey Comment
  UC748761 Image available Gilia tenuiflora subsp. interior Herbert L. Mason 1935-4-30 8340 Kern Walker Pass; ; Walker Pass, Kern Co. Comment
  UC908560  Gilia tricolor subsp. tricolor Herbert L. Mason 1935-3-27 8172 Fresno along road to Firebaugh w Fresno; w of Fresno along road to Firebaugh Comment
  UC908576  Gilia tricolor subsp. tricolor Herbert L. Mason 1929-3-29 5118 Contra Costa Mount Diablo 762 Comment
  UC908597  Gilia tricolor subsp. tricolor Herbert L. Mason 1925-3-23 1310 Alameda Sunol Comment
  UC963782  Gilia tricolor subsp. tricolor Herbert L. Mason 1929-3-23 5097 Madera hills e Madera; e of Madera Comment
  UC635648  Githopsis specularioides H. L. Mason 1928-4-29 4429 Contra Costa Sycamore Canyon, s slopes of Mt. Diablo Mt. Diablo Comment
  UC1100355  Glyceria borealis Herbert L. Mason 1948-7-18 13618 Siskiyou Grass Lake Comment
  UCD66783  Glyceria declinata Herbert L. Mason; Malcolm A. Nobs 1949-4-29 739 Marin Marsh at head of Tomales Bay on Bear Creek above junction with Mill Creek. Comment
  CAS-BOT-BC49534  Gnaphalium palustre Herbert Louis Mason 1947-8-13 13521 Modoc NE side of F Reservoir, N of Canby. Comment
  UC1056445  Gnaphalium palustre Herbert L. Mason 1936-7-12 11233 Mariposa Glacier Point road Sierra Nevada, Yosemite National Park, Peregoy Meadow 2255 Comment
  UC965580  Gnaphalium palustre Herbert L. Mason 1952-7-19 14451 Sierra 1.5 mi e Calpine (at junction with Sierraville-Beckwourth road); Sierra Nevada 1524 Comment
  JEPS21897  Gratiola ebracteata Herbert L. Mason 1945-6-29 12621 Lake Boggs Lake at base Mount Hanna; base of Mount Hanna, Boggs Lake Comment
  UC672547  Gratiola ebracteata H. L. Mason 1928-5-3 4473 Amador near Carbondale; hills near Carbondale Comment
  UC1191894  Gratiola neglecta Herbert L. Mason and Verne Grant 1947-7-11 13374 Modoc along Highway #395 s Alturas (near w side of road); South Fork of Pitt River Comment
  UC1051437  Gratiola neglecta Herbert L. Mason 1955-8-14 14656 Modoc n Rim Rock Reservoir (Drift Fence Reservoir); , n of Rim Rock Reservoir Comment
  CAS-BOT-BC304560  Grindelia hirsutula H. L. Mason 1921-7-3 s.n. San Mateo Pescadero - La Honda Road Comment
  CAS-BOT-BC304564  Grindelia hirsutula H. L. Mason 1921-7-3 s.n. San Mateo Pescadero - La Honda Road Comment
  RSA128842  Grindelia hirsutula H. L. Mason 1921-7-3 s.n. San Mateo Pescadero-La Honda Road. Comment
  POM273727  Guillenia flavescens H. L. Mason 1935-3-24 10005 Alameda West end of Corral Hollow. Comment
  UC672169  Gutierrezia sarothrae H. L. Mason 1926-5-2 3205 Riverside Temecula Valley Comment
  UC573076  Hackelia nervosa H. L. Mason 1922-7-26 336 Mariposa Spur of Porcupine Meadow (Tioga Pass Road); Sierra Nevada Mountains, Yosemite National Park 2438 Comment
  UC672257  Hazardia squarrosa var. squarrosa H. L. Mason 1930-10-25 5772 Monterey banks of San Antonio River San Antonio River Comment
  UCD132678  Hedypnois cretica H. L. Mason; A. Borthwick 1921-3-20 s.n. Santa Clara Guadalupe Canyon. Comment
  UC565501  Hedypnois rhagadioloides H. L. Mason 1928-4-13 4333 Sonoma hills between Santa Rosa and Calistoga (Reili School) Comment
Read comments
Mar 30 2009
  YM-YOSE65589  Hemicarpha H. L. Mason 1938-7-10 11905 Tuolumne SWAMP LAKE RESEARCH RESERVE. GRAVEL PIT LAKE. MIGUEL MEADOW Comment
  SEINET4170661 Image available Hemicarpha occidentalis H. L. Mason 1938-7-13 11945 Mariposa Base of El Capitan, Yosemite Valley; Yosemite National Park 1227 Comment
  UC912270  Hemizonia congesta Herbert L. Mason 1929-10-12 5487 San Luis Obispo 5.2 mi from Atascadero Comment
  UC912566  Hemizonia congesta subsp. luzulifolia Herbert L. Mason 7058 Contra Costa Laundry Farm Oakland Hills 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
  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
  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
  UC629721  Hesperevax caulescens H. L. Mason 1939-4-16 12081 San Joaquin Junction of Austin Road and Little John Creek; Stockton Comment
  UC672095  Hesperocallis undulata Herbert L. Mason 1928-3-10 4208 Riverside Coachella Mountains, Hidden Springs Canyon Hidden Springs Canyon; Coachella Mountains, Hidden Springs Canyon Comment
  UC571112  Hesperolinon bicarpellatum H. L. Mason June, 1930 5689 Lake four mi e Middletown Comment
  UCD110475  Hesperolinon bicarpellatum Herbert L. Mason 1945-6-28 12596 Lake 2.8 miles northeast from Middletown. Comment
  UC558458  Hesperolinon breweri Herbert L. Mason 1936-6-14 Contra Costa ridge running s Mount Diablo (head of Creek); Marsh Creek Comment
  UC1212443  Hesperolinon californicum Herbert L. Mason 1946-5-30 12795 Lake near Middletown; Inner North Coast Ranges, Locomono Creek Comment
  UC1212515  Hesperolinon disjunctum Herbert L. Mason 1952-6-19 14301 Colusa slope between Fouts Springs Red Bridge Public Camp; Inner North Coast Ranges, Mendocino National Forest Comment
  UCD110518  Hesperolinon disjunctum Herbert L. Mason 1952-6-19 14306 Glenn Black Diamond Ridge, inner North Coast Ranges. Comment
  RSA151821  Hesperolinon disjunctum H. L. Mason 1952-6-19 14301 Colusa Between Fouts Springs and Red Bridge Public Camp, Mendocino National Forest. Comment
  UC1212508  Hesperolinon disjunctum Herbert L. Mason 1946-5-30 12812 Lake Cache Creek drainage e Indian Valley (Bartlett Springs to Williams road); Inner North Coast Ranges 457 Comment
  OBI12534  Hesperolinon micranthum Herbert L. Mason 1946-7-4 12895 Sonoma Inner North coast Ranges. 2 mi E of Occidental on Harrison Grade Comment
  UC1212428  Hesperolinon micranthum Herbert L. Mason 1946-7-4 12895 Sonoma 2 mi e Occidental (on Harrison Grade); Inner North Coast Ranges Comment
  UC1212238  Hesperolinon micranthum Herbert L. Mason 1950-7-1 14046 Siskiyou on road from Callahans to summit of mountain; Scott Mountain grade Comment
  UC1212421  Hesperolinon micranthum Herbert L. Mason 1947-8-9 13486 Modoc 33.2 mi e of Alturus (Ridge n of Cedar Camp, near Cedar Pass, Warner Mountains); Warner Mountains Comment
  RSA151797  Hesperolinon spergulinum H. L. Mason 1946-7-4 12901 Sonoma 2 miles east of Occidental. Comment
  UC635456  Hesperomecon linearis H. L. Mason 1929-3-23 5092 Tulare 3 mi above Springville, Middle Tulare River Comment
  UC635637  Heterocodon rariflorum H. L. Mason Apr 1930 5551 Stanislaus 2 mi s Knight's Ferry (8 mi e of Oakdale) Comment
  SEINET10460617  Heterocodon rariflorum Mason Mason 11199 Mariposa WAWONA Comment
  UC672168  Heterotheca grandiflora Herbert L. Mason 1927-10-4 4122 Santa Cruz Ano Nueva Pt. Mouth of Waddell Creek, Ano Nueva Pt. Comment
  UC1093931  Heterotheca sessiliflora subsp. bolanderi Herbert L. Mason 1929-9-1 5405 Mendocino 3 mi n Fort Bragg Comment
  UC912313  Heterotheca sessiliflora subsp. bolanderi Herbert L. Mason 1929-9-1 5405 Mendocino sand dunes 3 mi n Fort Bragg Comment
  CAS-BOT-BC424430  Heuchera pilosissima H. L. Mason 1921-6-2 s.n. San Mateo Hill near Pebble Beach, Pescadero Comment
  CAS-BOT-BC319632  Hieracium albiflorum H. L. Mason 1921-7-14 s.n. San Mateo Pescadero Creek Comment
  UC1093878  Hieracium horridum Herbert L. Mason 1938-7-28 12036 Tuolumne e of Tilden Lake; Sierra Nevada, Yosemite National Park, Macomb Ridge 2438 Comment
  UC566693  Hieracium horridum Herbert L. Mason 1923-7-21 634 Tuolumne near Hetch Hetchy Dam site; Hetch Hetchy Ry. Comment
  RSA0016762  Hippuris vulgaris H. L. Mason 1948-9-5 13670 Mono Junction of Highway 108 and 395. Comment
  UC912636  Holcus lanatus Herbert L. Mason 1925-7-31 2205 Tuolumne Hog Ranch Mather (Mather) Comment
  CAS-BOT-BC412702  Hollisteria lanata Herbert Mason 1940-5-4 12266 Merced Ortigalita Canyon, 2 miles north east of Ortigalita Peak 304 Comment
  CAS-BOT-BC412705  Hollisteria lanata Herbert Mason 1940-5-4 12266 Merced Ortigalita Canyon, 2 miles north east of Ortigalita Peak 304 Comment
  SBBG61762  Hollisteria lanata H. L. Mason 1940-5-4 12266 Merced Ortigalita Cyn, 2 mi NE of Ortigalita Peak 304 Comment
  UC965506  Hordeum brachyantherum subsp. brachyantherum Herbert L. Mason 1952-7-19 14432 Nevada meadow opposite University of California Trout Laboratory; Sierra Nevada, Sage Hen Creek Comment
  UC1100316  Hordeum jubatum Herbert L. Mason and S. Galen Smith 1948-7-30 8257 Merced just n Ingomar Comment
  UCD85760  Hordeum jubatum Herbert L. Mason 1947-8-9 13478 Modoc E side of Fairchild Swamp, N of Alturas. Comment
  UC555296  Horkelia californica subsp. frondosa H. L. Mason 1926-5-26 3244 Alameda Niles Canyon Comment
  GH345648  Horkelia parryi H. L. Mason 1928-5-3 4464 Unknown One mile south of Ione Comment
  POM199446  Horkelia parryi H. L. Mason 1932-4-24 6978 Amador 3 miles S of Ione Comment
  CAS-BOT-BC312530  Hulsea heterochroma H. L. Mason 1934-9-9 8152 Monterey Headwaters of Arroyo Seco, Santa Lucia Mountains Comment
  UC1101445  Hydrocotyle ranunculoides Herbert L. Mason and Verne Grant 1946-7-24 12917 Marin first lake s. Bear Valley (2.8 mi. n. of Lake Ranch) Comment
  UC672327  Hydrophyllum capitatum var. alpinum H. L. Mason 1926-5-29 3302 Nevada Truckee River Comment
  UC672324  Hydrophyllum occidentale H. L. Mason 1936-5-16 11133 Madera Chowchilla Mountain Comment
  UC1178027  Hymenoxys hoopesii Herbert L. Mason and L. W. Reinecke 1937-7-31 14809 Tuolumne Upper Huckleberry Meadow Sierra Nevada, Upper Huckleberry Meadow 2621 Comment
  CAS-BOT-BC410235  Hypericum concinnum H. L. Mason 1930-6-1 5676 Lake St. Helena Creek, slopes of Mount St. Helena Comment
  UC570745  Hyptis emoryi H. L. Mason 1928-3-10 4231 Riverside Coachella Mountains Hidden Springs Canyon; , Hidden Springs Canyon Comment
  JEPS812  Ipomopsis aggregata Herbert L. Mason 1924-6-15 1035 Plumas Blairsden Feather River (near the junction of Graeagle creek and the Feather River) Comment
  UC908137  Ipomopsis aggregata H. L. Mason 1932-9-9 7181 Placer Carson Meadows Comment
  UC571174  Iris macrosiphon H. L. Mason 1926-3-21 2762 Lake between Middletown and Mt. St. Helena Comment
  UC1192315  Iris missouriensis Herbert L. Mason 1949-5-30 Lassen ne of Burney Falls 1524 Comment
  CAS-BOT-BC133687  Iris munzii H. L. Mason 1938-5-9 11810 Tulare North Fork of the Tule River one mile below Milo Comment
  JEPS19119  Isocoma menziesii var. sedoides Herbert L. Mason 1927-9-24 4086 Santa Barbara West ranch Buena Vista Creek; Santa Cruz Island Comment
  UC912311  Isocoma menziesii var. sedoides Herbert L. Mason 1929-10-13 5501 San Luis Obispo 2.5 mi n Cambria Comment
  YM-YOSE59273  Isoetes bolanderi H. L. Mason 1938-7-9 11898 Tuolumne SWAMP LAKE Comment
  CAS-BOT-BC112401  Isolepis carinata Herbert L. Mason 1946-5-19 12783 Mendocino Cleone Lake, north of Fort Bragg Comment
  UC1100839  Isolepis carinata Herbert L. Mason 1946-5-19 12783 Mendocino n Fort Bragg (Cleone Lake); n of Fort Bragg, Cleone Lake Comment
  UC1056960  Isolepis carinata Herbert L. Mason 1940-5-22 12297 Mendocino s Albion (coastal bluff); s of Albion Comment
  CAS-BOT-BC112628  Isolepis cernua H. L. Mason 1921-6-2 s.n. San Mateo Pebble Beach, near Pescadero. Comment
  UC634682  Isomeris arborea H. L. Mason 1930-4-20 5560 Kern Caliente Creek; Tehachapi Mountains Comment
  UC635318  Isopyrum stipitatum H. L. Mason 1929-3-15 5063 Alameda 18 mi s Livermore (Arroyo Mocho to Mount Hamilton); Arroyo Mocho to Mount Hamilton Comment
  UC635534  Isopyrum stipitatum H. L. Mason 1927-3-20 3657 Alameda e Cedar Mountain (Arroyo Mocho, Mount Hamilton Range); Mount Hamilton Range, e of Cedar Mountain, Arroyo Mocho Comment
  RSA85305  Isopyrum stipitatum H. L. Mason 1927-3-20 657 Alameda Arroyo Mocho, 17 miles S of Livermore Comment
  UC965561  Ivesia sericoleuca Herbert L. Mason 1952-7-19 14412 Nevada Sage Hen Creek Sierra Nevada (meadow opposite Univ. of Calif. Trout Laboratory) 1981 Comment
  CAS-BOT-BC142372  Ivesia shockleyi Herbert L. Mason 1936-7-28 11397 Mono Dana Plateau, vicinity of Mount Dana - Sierra Nevada 3657 Comment
  UC642653  Ivesia shockleyi var. shockleyi H. L. Mason 1936-7-28 11398 Mono vicinity Mount Dana (Dana Plateau); Sierra Nevada 3657 Comment
  UC642920  Ivesia shockleyi var. shockleyi H. L. Mason 1936-7-28 11397 Mono vicinity Mount Dana (Dana Plateau); Sierra Nevada 3657 Comment
  UC1100942  Juncus balticus Herbert L. Mason and Malcolm A. Nobs 1949-4-27 725 Solano Suisun State Game Refuge Comment
  POM312832  Juncus balticus subsp. ater H. L. Mason, Verne Grant 1947-6-26 13248 Solano Cordelia Slough, Suisun Marsh. Comment
  UC1179032  Juncus bolanderi Herbert L. Mason 1929-8-24 5394 Mendocino Pudding Creek Slough Fort Bragg Comment
  UC1179034  Juncus bolanderi Herbert L. Mason 1932-7-24 7117 Marin Inverness Ridge Comment
  UC1101045  Juncus bufonius Herbert L. Mason 1949-7-7 14028 San Mateo Mouth of Gazos Creek Comment
  UCD141389  Juncus bufonius Herbert L. Mason; Verne Grant 1947-7-9 13287 Shasta Highway 299, just east of Hatchet Creek Summit. 1219 Comment
  UC1101033  Juncus dubius Herbert L. Mason and S. Galen Smith 1948-8-19 8384 Merced 1 mi w Snelling Comment
  YM-YOSE65672  Juncus dubius H. L. Mason 1938-7-10 11925 Tuolumne SWAMP LAKE RESEARCH RESERVE. SOUTH ISLAND. SWAMP LAKE Comment
  POM312826  Juncus effusus subsp. pacificus H. L. Mason, Verne Grant 1946-8-21 13071 San Joaquin Middle River bridge, Victoria Island. Comment
  UC1101031  Juncus hesperius Herbert L. Mason 1946-7-24 12932 Marin second lake s. Bear Valley (on rd. to Lake Ranch) Comment
  UC1101010  Juncus lescurii Herbert L. Mason 1946-6-9 12874 San Luis Obispo between Oceano and mouth of Santa Maria River; Dune Lakes Comment
  UC1101011  Juncus lescurii Herbert L. Mason 1946-6-9 12873 San Luis Obispo between Oceano and mouth of Santa Maria River; Dune Lakes Comment
  UC1101099  Juncus longistylis Herbert L. Mason 1947-8-13 13534 Modoc n of Canby (ne side of F reservoir) Comment
  UC1056296  Juncus macrandrus Herbert L. Mason 1939-7-11 12113 Tuolumne 0.5 mi below Swamp Lake (s Tuolumne County); Yosemite National Park 1554 Comment
  UC1102963  Juncus macrandrus Herbert L. Mason 1958-8-6 Tuolumne w side Hetch Hetchy Dam (meadow at Swamp Lake); Sierra Nevada, Yosemite National Park, Swamp Lake 1584 Comment
  UC1100955  Juncus mexicanus Herbert L. Mason 1947-8-13 13536 Modoc n of Canby (ne side of F reservoir) Comment
  UC1100995  Juncus nevadensis Herbert L. Mason 1948-7-18 13612 Siskiyou Grass Lake Comment
  UC965656  Juncus orthophyllus Herbert L. Mason 1952-8-16 14467 Nevada opposite Univesity of California Trout Laboratory; Sierra Nevada, Sage Hen Creek 1981 Comment
  UC632746  Juncus triformis H. L. Mason 1938-7-11 11939 Tuolumne w of Hetch Hetchy; Yosemite National Park, Miguel Meadow 1584 Comment
  UC1101101  Juncus xiphioides Herbert L. Mason and S. Galen Smith 1948-8-19 8374 Merced bridge below Snelling; San Joaquin River Comment
  UC1101108  Juncus xiphioides Herbert L. Mason, Malcolm A. Nobs, and S. Galen Smith 1949-7-14 987 Fresno 2 mi w Clovis (on road to Cameo) Comment
  UC1083321  Juniperus californica Herbert L. Mason 1925-12-31 2570 Lake Bartlet Mt. Road Comment
  UC1051454  Justicia californica Herbert L. Mason 1952-4-7 14212 Riverside Palm Canyon Comment
  CAS-BOT-BC56382  Kalmia microphylla subsp. microphylla Herbert L. Mason; L. W. Reinecke 1937-7-22 11585 Tuolumne Swamp Lake, just south of Miguel Meadows in the hills just west of Hetch Hetchy 1584 Comment
  GH365654  Keckiella antirrhinoides H. L. Mason 1926-4-30 3142 Unknown Pala Grade Comment
  UC565601  Keckiella breviflora Herbert L. Mason 1925-6-24 2105 Tuolumne Mather 1432 Comment
  UC566678  Keckiella breviflora H. L. Mason 1928-5-4 4493 El Dorado near Latrobe (Swift Ranch) Comment
  UC1039511  Kelloggia galioides H. L. Mason 1926-5-31 3356 Calaveras 1.2 mi sw Calaveras Big Trees (on old road) Comment
  UC1111593  Kelloggia galioides Herbert L. Mason 1941-7-14 12523 Madera Ottoway Lake; Sierra Nevada, Yosemite National Park 2987 Comment
  UCD123830  Kickxia spuria Herbert L. Mason; S. Galen Smith 1948-8-19 8365 Merced about 2 miles northeast of Merced on Snelling highway. Comment
  GH360099  Koeleria cristata H. L. Mason 1932-4-28 7051 Unknown Laundry farm, Oakland Hills Comment
  CAS-BOT-BC499636  Kopsiopsis strobilacea H. L. Mason 1927-5-11 s.n. Nevada You-Bet, near Grass Valley Comment
  UC1076550  Kumlienia hystricula Herbert L. Mason 1936-3-14 10997 Calaveras s of Sheep Ranch (San Antonio Creek); San Antonio Creek 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
  UC571110  Larrea tridentata Herbert L. Mason 1926-4-26 3007 Los Angeles Little Rock Creek; Mojave Desert Comment
  SEINET10406507 Image available Larrea tridentata S. C. Mason 1908-1 Riverside Palm Springs Comment
  UC632836  Lasthenia californica subsp. californica H. L. Mason 1936-4-10 11051 Calaveras field s Angels Camp Comment
  CAS-BOT-BC352919  Lasthenia glaberrima H. L. Mason 1928-5-3 4474 Amador Hills near Carbondale Comment
  UC566715  Lasthenia gracilis Herbert L. Mason 1932-4-2 6898 Kern 3 mi w Muroc; Mojave Desert Comment
  RSA116657  Lasthenia macrantha subsp. macrantha H. L. Mason 1921-6-1 s.n . San Mateo Pebble Beach near Pescadero Comment
  SFV16517  Lathyrus hirsutus S. Mason, P. Rector 1993-4-16 s. n. Orange Santa Ana Mountains CA State Highway 74 at Lower San Juan Campground. Adjacent to campground sign on southeast side of road. 396 Comment
  CAS-BOT-BC205028  Lathyrus jepsonii var. jepsonii Herbert L. Mason 1945-7-12 12650 Solano Suisun Marshes Comment
  UC673603  Lathyrus jepsonii var. jepsonii Herbert L. Mason 1923-10-6 772 Solano Suisun Marshes Comment
  UC673610  Lathyrus littoralis Herbert L. Mason 1926-4-18 2863 San Francisco San Francisco Comment
  UC1111597  Lathyrus nevadensis var. nevadensis Herbert L. Mason 1936-4-10 11056 Calaveras ridge between Sheep Ranch and Murphys Comment
  UC673601  Lathyrus sulphureus H. L. Mason 1925-7-4 2143 Tuolumne Mather Sierra Nevada Mountains, Yosemite National Park Comment
  UC673596  Lathyrus vestitus var. alefeldii Herbert L. Mason 1926-4-30 3117 a San Diego Temecula to Pala; Temecula Canyon, Pala Grade Comment
  UC964776  Lathyrus vestitus var. vestitus Herbert L. Mason 1928-5-6 4562 Alameda Cedar Mountain Comment
  UC912574  Layia chrysanthemoides Herbert L. Mason 1929-3-31 5151 Contra Costa Sacramento River at Antioch; Sacramento River Comment
  UC912610  Layia glandulosa Herbert L. Mason 1932-4-2 6900 Kern 3 mi w Muroc; Mojave Desert Comment
  UC912277  Layia septentrionalis Herbert L. Mason 1929-4-29 5235 Lake 2.9 mi w Lakeport Comment
Read comments
Jan 3 2018
  UC571051  Ledum glandulosum H. L. Mason 1928-8-25 4924 Mendocino 1 mi e of mouth of Noyo River Comment
  UC571053  Ledum glandulosum H. L. Mason 1926-2-21 2657 Marin on road from Point Reyes Light Comment
  LA202390  Lembertia congdonii Herbert L. Mason; 1935-4-30 9315 Kern 5 mi. W of Bakersfield Comment
  UC1101273  Lemna aequinoctialis Herbert L. Mason 1946-8-15 13009 Colusa 2 mi w on Williams Highway by bridge Colusa; Williams Highway Comment
  UC936136  Lemna minuscula Herbert L. Mason 1946-7-24 12926 Marin about 2.5 mi nw of Lake Ranch (e side of Drakes Bay); Drakes Bay 60 Comment
  UC1101269  Lemna trisulca Herbert L. Mason, Verne Grant 1947-7-12 13432 Modoc n of Likely (Corportation Ranch Headquarters); Corportation Ranch Headquarters Comment
  CAS-BOT-BC245659  Lemna turionifera H. L. Mason 1955-6-8 14630 Shasta West edge of Fall River Mill Comment
  CAS-BOT-BC89135  Lepidium didymum H. L. Mason 1921-5-29 s.n. San Mateo Pebble Beach near Pescadero. Comment
  UC673522  Lepidium lasiocarpum var. lasiocarpum Herbert L. Mason 1928-3-11 4243 Riverside near Indio Comment
  UC1100304  Leptochloa fascicularis Herbert L. Mason and Verne Grant 1946-8-14 13038 Butte Sacramento Outing Club Butte Sink (canal near big pond) Comment
  POM313213  Leptochloa fusca subsp. fascicularis H. L. Mason 1945-9-19 12730 Butte Gray Lodge Game Refuge, northwest of Pennington Comment
  UCD63845  Leptochloa fusca subsp. fascicularis H. L. Mason 1945-9-19 12730 Butte Gray Lodge Game Refuge, northwest of Pennington. Comment
  UC1186146  Leptodactylon pungens Herbert L. Mason 1938-7-25 11999 Tuolumne Deep Lake at e base Mahan Peak (Yosemite National Park); , Deep lake e base Mahan Peak Comment
  UC714170  Leptodactylon pungens H. L. Mason 1936-7-28 11407 Mono vicinity Mount Dana (Dana Plateau); Sierra Nevada, vicinity of Mount Dana, Dana Plateau 3505 Comment
  UC908683  Leptodactylon pungens Herbert L. Mason 1927-6-15 3785 San Bernardino summit of Mt. Baldy San Gabriel Range, , Summit of Mt. Baldy (Mount San Antonio) 2133 Comment
  CAS-BOT-BC226560  Leptosiphon acicularis Herbert L. Mason 1929-4-29 5239 Lake East base of road from Hopland to Lakeport, 2.9 miles west of Lakeport Comment
  SD44505  Leptosiphon aureus Herbert L. Mason 1926-4-26 2945 Los Angeles Pacoima Wash, foothills of San Gabriel Mountains. Comment
  SD45379  Leptosiphon aureus Herbert L. Mason 1935-4-30 8348 Kern West side of Walker Pass near summit. Comment
  POM264403  Leptosiphon montanus H. L. Mason 1935-4-30 6262 Kern Below Hobo Hot Springs, lower Kern River Canyon Comment
  UC908592  Leptosiphon nudatus Herbert L. Mason 1929-6-2 5353 Kern 30 mi from Bakersfield; Tehachpai Mountains, Tejon Pass Comment
  RSA0103656  Leptosiphon parviflorus H. L. Mason 1935-5-21 8315 San Mateo Pebble Beach, Pescadero. Comment
  UC1093954  Lessingia micradenia var. glabrata Herbert L. Mason 1936-9-13 11528 Santa Clara w Madrone Station Comment
  UC912323  Lessingia virgata Herbert L. Mason 1929-10-4 5448 Placer on Folsom Road 3 mi s Roseville Comment
  CAS-BOT-BC56392  Leucothoe davisiae Herbert L. Mason 1941-7-19 12526 Madera Ottoway Creek northeast of Merced Pass Trail, Sierra Nevada, Yosemite National Park 2743 Comment
  UC642674  Lewisia glandulosa H. L. Mason 1936-7-23 11283 Tuolumne alpine slopes of Mount Conness Sierra Nevada, Mount Conness Comment
  UC642828  Lewisia nevadensis H. L. Mason 1926-5-30 3330 Placer Kit Carson Pass 2621 Comment
  UC642829  Lewisia pygmaea H. L. Mason 1923-8-2 687 Tuolumne e side of Unicorn Peak Sierra Nevada, Unicorn Peak Comment
  UC1056433  Lewisia pygmaea Herbert L. Mason 1936-7-7 11167 Mariposa Hetch Hetchy Trail w Dark Hole (Research Reserve); Sierra Nevada, Yosemite National Park 2438 Comment
  UC1275799  Lewisia rediviva Herbert L. Mason 1963-7-4 15226 Mono ridge w Conway Summit Comment
  UC1056425  Lewisia triphylla Herbert L. Mason 1936-7-15 11246 Tuolumne 1/2 mi w Mather; Sierra Nevada 1371 Comment
  UC1056430  Lewisia triphylla Herbert L. Mason 1936-7-6 11039 Mariposa Yosemite Falls Trail Sierra Nevada, Yosemite National Park 2133 Comment
  UC566843  Ligusticum apiifolium Herbert L. Mason 1926-5-22 3220 Alameda Berkeley Hills Comment
  UC1100162  Lilaea scilloides Herbert L. Mason and S. Galen Smith 1948-8-9 8292 Santa Clara just w of summit Pacheco Pass (small reservoir) Comment
  UC965619  Lilaea scilloides Herbert L. Mason 1952-7-19 14445 Sierra 1.5 mi e Calpine (at junction of Calpine with Sierraville-Beckwourth road); Sierra Valley 1524 Comment
  UC1100169  Lilaea scilloides Herbert L. Mason 1948-6-10 13575 Mendocino 3 mi s Gualala (Highway 1) Comment
  UC673407  Lilium maritimum Herbert L. Mason Aug 1930 5739 Mendocino Fort Bragg Comment
  UC673399  Lilium parvum Herbert L. Mason 1925-6-29 2135 Tuolumne Lake Eleanor; Sierra Nevada, Yosemite National Park 1432 Comment
  UC635634  Limnanthes alba subsp. alba H. L. Mason 1928-5-3 4456 San Joaquin 6 mi n Clement Comment
  UC971801  Limnanthes alba subsp. alba Charles T. Mason Jr. 1948-5-13 1184 Sacramento 6 mi e Sacramento (ditch on s side of State Hwy 16) 30 Comment
  UC971851  Limnanthes alba subsp. versicolor Charles T. Mason Jr. 1948-5-13 1188 El Dorado 12 mi n Plymouth (along se side of State Hwy 49) 518 Comment
  UC971853  Limnanthes alba subsp. versicolor Charles T. Mason Jr. 1948-5-13 1189 El Dorado 12.7 mi n Plymouth (along se side of State Hwy 49) 518 Comment
  SEINET6670265  Limnanthes alba var. alba C. T. Mason 1949-4-23 1252 Butte 7 miles south of Oroville, along the east side of State Highway 24 Comment
  SEINET6670296  Limnanthes alba var. alba C. T. Mason 1948-5-13 1184 Sacramento South side of State Highway 16, six miles east of Sacroamento 30 Comment
  CAS-BOT-BC45855  Limnanthes bakeri Charles T. Mason, Jr. 1948-5-8 1181 Mendocino 0.6 mi. N. of Willits High School on east side of US Highway 101 426 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
  UC971870  Limnanthes douglasii subsp. douglasii Charles T. Mason Jr. 1948-3-14 1123 Sonoma 0.3 mi n El Verano School (open field w side of road) Comment
  UC971874  Limnanthes douglasii subsp. douglasii Charles T. Mason Jr. 1948-5-8 1182 Napa Pope Valley Comment
  RSA435677  Limnanthes douglasii subsp. douglasii H. L. Mason 1941-4-6 12415 Butte Hills west of Cherokee. Comment
  SEINET6670448  Limnanthes douglasii subsp. douglasii C. T. Mason 1948-3-14 1198 Marin 0.5 miles SE of junction of Petaluma-Point Reyes road with Fairfax-Nicasio Point Road Comment
  POM311121  Limnanthes douglasii subsp. nivea C. T. Mason 1948-5-8 1177 Mendocino Along U.S. Highway 101 about 8 miles north of Ukiah. 457 Comment
  UC971791  Limnanthes douglasii subsp. rosea Charles T. Mason Jr. 1949-3-31 1245 Merced 5 mi se Merced (along road to El Nido) Comment
  UC971793  Limnanthes douglasii subsp. rosea Charles T. Mason Jr. 1949-3-31 1248 Merced 6 mi from U.S. Highway 99 (along road from Merced to Snelling) Comment
  UC971822  Limnanthes douglasii subsp. rosea Charles T. Mason Jr. 1948-4-25 1160 Stanislaus along State Hwy 4 about 1/8 mi w cross road to Milton and Knights Ferry 60 Comment
  RSA435686  Limnanthes douglasii subsp. rosea Charles T. Mason Jr. 1949-3-31 1247 Merced 6 miles southeast of LeGrand along the road to Raymond. 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
  UC971817  Limnanthes douglasii subsp. rosea Charles T. Mason Jr. 1948-3-27 1135 Solano 200 yd nw Rio Vista Junction overpass (along state hwy 12) 27 Comment
  UC971820  Limnanthes douglasii subsp. rosea Charles T. Mason Jr. 1948-3-27 1137 Solano 3 mi s Winters (along road to Vacaville) 30 Comment
  SEINET4462872 Image available Limnanthes douglasii var. sulphurea H. L. Mason, A. M. Carter 1938-1 1413 Unknown Comment
  GH364863  Limnanthes floccosa C. T. Mason, Jr. 1949-4-24 1256 Unknown Nine miles N.W. Oroville on the north side of the Oroville-Chico road Comment
  UC971896  Limnanthes montana Charles T. Mason Jr. 1949-5-9 1291 Mariposa 2 mi s Mt. Bullion Comment
  POM311128  Limnanthes montana Charles T. Mason Jr. 1948-5-2 1173 Fresno Big Sandy Valley, east side of Black Mountain, 4.2 miles from junction of Highway 168 and road to Aubrey. 579 Comment
  UC566956  Limonium californicum H. L. Mason 1928-9-2 4948 Alameda Bay Farm Island Comment
  UC1101433  Limosella acaulis Herbert L. Mason and S. Galen Smith 1948-8-9 8293 Santa Clara just w summit Pacheco Pass; Pacheco Pass, just w of summit Comment
  UC1178836  Linanthus ambiguus Herbert L. Mason 1940-5-3 12269 Merced nw of Ortigalita Peak; South Coast Ranges, Ortigalita Valley 426 Comment
  UC907987  Linanthus androsaceus Herbert L. Mason 1924-4-20 901 Alameda Berkeley Hills Comment
  UC907991  Linanthus androsaceus Herbert L. Mason 1926-5-26 3234 Alameda Niles Canyon Comment
  UC907993  Linanthus androsaceus Herbert L. Mason 1933-4-21 7193 A Santa Clara w of Smith Creek (lower slopes of Mount Hamilton); Mount Hamilton Comment
  UC908797  Linanthus androsaceus Herbert L. Mason 1928-4-8 4289 Sonoma 2 mi n Fort Ross Comment
  JEPS58167  Linanthus androsaceus Herbert L. Mason 1924-5-4 1005 Alameda s of Claremont Canyon; Berkeley Hills Comment
  UC907843  Linanthus androsaceus Herbert L. Mason 1943-4-15 12564 Santa Clara w side Pachaco Pass (border of Santa Clara-Merced Counties) Comment
  UC908562  Linanthus androsaceus Herbert L. Mason 1930-3-30 5540 San Benito 14 mi below Pinnacles; San Benito River Canyon Comment
  SEINET8729325 Image available Linanthus androsaceus subsp. croceus Herbert L. Mason 1935-1 8315 San Mateo Pebble Beach, Pescadero Comment
  SD46101  Linanthus arenicola Herbert L. Mason 1952-4-11 14250 San Bernardino Lava bed just east of Dagget. Comment
  UC567794 Image available Linanthus arenicola Herbert L. Mason 1935-3-29 8232 San Bernardino 1 mi s Trona (w side of lake); Mohave Desert, Searles Lake; Searles Lake, Mohave Desert, San Bernardino Co. Comment
  UC754226 Image available Linanthus bakeri Herbert L. Mason 1932-4-25 7015 El Dorado Pilot Hill; ; Pilot Hill, Eldorado Co. Comment
  UC907851  Linanthus bicolor Herbert L. Mason 1934-3-28 8007 Kern 25 mi w Onyx (lower Kern River Canyon); Kern River Canyon Comment
  UC908482  Linanthus bicolor Herbert L. Mason 1935-5-1 8374 Tulare n of Kernville; Sequoia National Forest, Kern River Comment
  UC908559  Linanthus bicolor Herbert L. Mason 1926-4-11 2829 Alameda Cedar Mountain and Rancho Repose Mount Hamilton Range, Arroyo Mocho Comment
  UC908558  Linanthus bicolor Herbert L. Mason 1943-4-15 12562 Santa Clara w side Pacheco Pass (border of Santa Clara and Merced Counties) Comment
  UC908802  Linanthus bigelovii Herbert L. Mason 1935-4-30 8352 Kern Walker Pass Comment
  UC971715  Linanthus bolanderi Herbert L. Mason 1941-4-5 12404 Colusa 3 mi s Stonyford Comment
  POM264397  Linanthus californicus subsp. tomentosus H. L. Mason 1941-3-28 12402 San Luis Obispo North end of Nipomo mesa. 76 Comment
  UC907827  Linanthus ciliatus Herbert L. Mason 1941-7-7 12497 Madera Buck Camp Comment
  UC908356  Linanthus ciliatus H. L. Mason 1935-5-9 Stanislaus Arroyo del Puerto Mount Hamilton Range, Red Mountains Comment
  UC963791  Linanthus ciliatus Herbert L. Mason Jul 7 1937-Jul 8 1937 12144 Nevada 3 mi w Donner Summit; Sierra Nevada 2072 Comment
  SD45369  Linanthus concinnus Herbert L. Mason 1927-6-15 3786 San Bernardino Trail to summit of Mount Baldy (Mt. San Antonio), San Gabriel Mountains 2133 Comment
  UC963793  Linanthus dianthiflorus Herbert L. Mason 1926-5-1 3176 San Diego n side Palomar Mountain; Oak Grove Comment
  UC908292  Linanthus dichotomus Herbert L. Mason 1935-3-30 8253 San Luis Obispo Cholame Valley Comment
  SEINET8729335 Image available Linanthus dichotomus subsp. meridianus Herbert L. Mason 1942-1 12540 Napa Eight miles south of Pope Valley Store Comment
  UC907874  Linanthus filipes Herbert L. Mason 1928-5-3 4469 Amador near Carbondale Comment
  UC963761  Linanthus harknessii Herbert L. Mason 1924-6-20 1084 Plumas between Gold Lake and Bear Lake Comment
  UC908664  Linanthus jepsonii Herbert L. Mason 1940-5-21 12293 Sonoma Head of Maycama Creek Knights Valley Comment
  UC908781  Linanthus jepsonii Herbert L. Mason 1928-4-13 4334 Sonoma Reibli School, near springs Comment
  UC908783  Linanthus jepsonii Herbert L. Mason 1928-4-13 4337 Sonoma Reibli School Comment
  UC907889  Linanthus liniflorus Herbert L. Mason 1949-4-23 14001 Kern e of Bakersfield Comment
  UC908709  Linanthus liniflorus Herbert L. Mason 1938-5-6 11765 Monterey outside Jolon (at the junction of Indians Road) Comment
  UC908749  Linanthus montanus Herbert L. Mason 1938-5-10 11817 Tulare near Auckland Ranch (road sw of Badger); General Grant National Park Comment
  UC1191149  Linanthus parviflorus Herbert L. Mason 1928-5-4 4482 El Dorado 4 mi n Shingle Springs; Green Valley Comment
  UC908616  Linanthus parviflorus Herbert L. Mason 1926-4-26 2965 Los Angeles Mint Canyon Road, summit of 1st grade Comment
  UC908800  Linanthus parviflorus Herbert L. Mason 1932-4-28 7036 Monterey Pajaro Hills Comment
  UC909079  Linanthus parviflorus Herbert L. Mason 1932-7-24 7124 Marin Point Reyes Comment
  UC908692  Linanthus parviflorus Herbert L. Mason 1926-3-22 2790 Napa along road from Calistoga to Petrified Forest (near Sonoma County line) Comment
  UC908626  Linanthus pygmaeus Herbert L. Mason 1932-4-3 6918 Fresno 3 mi w Coalinga (on the Priest Valley road) Comment
  UC1101437  Lindernia dubia var. anagallidea Herbert L. Mason and S. Galen Smith 1948-8-18 8351 Kings canal just w Stratford; San Joaquin Valley Comment
  UC964732  Lindernia dubia var. anagallidea Herbert L. Mason 1925-7-16 2175 Tuolumne Mather Comment
  CAS-BOT-BC111997  Lipocarpha occidentalis H. L. Mason 1937-7-21 11557 Tuolumne Miguel Meadows 1645 Comment
  UC632775  Lipocarpha occidentalis H. L. Mason 1936-7-12 11216 Mariposa along Merced River, Yosemite National Park, Yosemite Valley Merced River; Yosemite National Park, Yosemite Valley, Merced River Comment
  UC635726  Lipocarpha occidentalis Herbert L. Mason 1937-7-21 11557 Tuolumne Yosemite National Park, Miguel Meadows Miguel Meadows; Yosemite National Park, Miguel Meadows 1645 Comment
  CAS-BOT-BC111983  Lipocarpha occidentalis H. L. Mason 1938-7-10 11904 Tuolumne Margin of lake at gravel pit, Miguel Meadow, west of Hetch-Hetchy. 1584 Comment
  CAS-BOT-BC111994  Lipocarpha occidentalis H. L. Mason 1938-7-13 11945 Mariposa Meadow at base of El Capitan, Yosemite Valley 1226 Comment
  SEINET10916076  Lipocarpha occidentalis Herbert L. Mason 1938-7-13 Mason 11945 Mariposa Meadow, base of El Capitan, Yosemite Valley. Yosemite National Park. 1227 Comment
  UC673589  Listera convallarioides H. L. Mason July, 1930 5709 Calaveras near Hermit Springs; Blue Creek, tributary of North Fork of Mokelumne River Comment
  UC1076088  Lithocarpus densiflorus Herbert L. Mason 1928-7-14 4899 Humboldt East Fork of Eel River East Fork of Eel River, Gaberville; Gaberville Comment
  UC1076090  Lithocarpus densiflorus Herbert L. Mason 1927-7-31 4002 Santa Cruz Mt. Herman Comment
  UC1076091  Lithocarpus densiflorus Herbert L. Mason 1928-4-8 4296 Sonoma 2 mi n Ft. Ross (coast) Comment
  UC1076093  Lithocarpus densiflorus Herbert L. Mason 1926-2-28 2673 Marin Mt. Tamalpais Comment
  UC1083185  Lithocarpus densiflorus H. L. Mason 1928-10-21 5000 Mendocino Fort Bragg Comment
  UC1093905  Lithocarpus densiflorus Herbert L. Mason 1932-8-26 7160 Mendocino Pine Barrens at Mendocino City; Mendocino City Comment
  UC1056431  Lithophragma glabrum H. L. Mason 1936-7-27 11394 Tuolumne Gaylor Lakes w Tioga Pass; Sierra Nevada, Yosemite National Park, Gaylor Lakes 3200 Comment
  UC570873  Lithophragma glabrum Herbert L. Mason 1926-5-30 3307 El Dorado hills above Emerald Bay (Lake Tahoe); , hills above Emerald Bay 1981 Comment
  UC909131  Loeseliastrum matthewsii Herbert L. Mason 1926-4-27 3071 San Bernardino n. Victorville Comment
  SD46099  Logfia depressa Herbert L. Mason 1952-4-11 14252 San Bernardino Black lava bed just east of Dagget. Comment
  UC581144  Logfia depressa H. L. Mason 1935-3-29 8209 Kern Red Rock Canyon Mojave Desert Comment
  CAS-BOT-BC342113  Logfia filaginoides H. L. Mason 1932-5-4 7055 Alameda Laundry Farm, Oakland Hills Comment
  UC1093864  Logfia filaginoides Herbert L. Mason 1947-4-26 13206 Santa Cruz near Felton; Mission Springs Comment
  UC1111576  Logfia filaginoides Herbert L. Mason 1938-5-7 11782 Santa Barbara Burton Mesa Comment
  UC673622  Logfia filaginoides H. L. Mason 1933-4-30 7232 Lake near Aetna Springs; Serpentine Ridge Comment
  UC672271  Logfia gallica H. L. Mason 1932-5-4 7054 Alameda Laundry Farm Oakland Hills, Laundry Farm Comment
  UC672273  Logfia gallica H. L. Mason 1933-5-29 7246 El Dorado Shingle Springs Comment
  UC672320  Logfia gallica H. L. Mason 1932-5-25 Shasta Hill above Redding Comment
  UC769968  Lomatium caruifolium var. denticulatum Herbert L. Mason 1934-3-25 7944 Sacramento Rio Linda, Keithly ranch Sacramento Valley, Rio Linda, Keithly ranch Comment
  UC985672  Lomatium dissectum var. multifidum Herbert L. Mason and Verne Grant 1947-7-9 13311 Modoc summit of Warner Range, Cedar Pass Warner Range, Cedar Pass 1920 Comment
  UC1178993  Lomatium hooveri Herbert L. Mason 1947-3-30 13164 a Colusa 0.5 mi E of Lake Co. line on Williams-Lower Lake Highway western Colusa Co. Comment
  SEINET190370  Lomatium macrocarpum Herbert L. Mason 1940-5-4 286 Merced Piedra Azul Creek norhtwest of Ortigalita Peak Inner South Coast Ranges 305 Comment
  RSA256499  Lomatium parvifolium H. L. Mason, E. Lee 1935-2-9 9230 Monterey Point Lobos State Park Comment
  UC566817  Lomatium utriculatum H. L. Mason 1926-3-22 2786 Napa from Calistoga to Petrified Forest Comment
  UC912447  Lonicera conjugialis Herbert L. Mason 1923-7-20 623 Tuolumne Ackerson Meadow Mather, Ackerson Creek Comment
  UC632803  Lonicera conjugialis H. L. Mason 1936-7-6 11160 Mariposa w Dark Hole (Hetch Hetchy Trail, Research Reserve); Yosemite National Park 2438 Comment
  UC912444  Lonicera hispidula var. vacillans Herbert L. Mason 1934-4-28 8080 Sonoma Jensen's Ranch Comment
  UC555411  Lotus benthamii H. L. Mason 1923-6-23 558 Monterey Point Lobos Comment
  GH366505  Lotus formosissimus H. L. Mason 1928-4-13 4308 Unknown north of San Rafael Comment
  UC555404  Lotus heermannii H. L. Mason 1931-11-1 5880 Monterey road between Monterey and Carmel Comment
  UC632761  Lotus oblongifolius var. oblongifolius H. L. Mason 1938-7-7 11864 Tuolumne w of Hetch Hetchy; Sierra Nevada, Yosemite National Park, Miguel Meadow 1584 Comment
  UC1191607  Lotus purshianus var. purshianus Herbert L. Mason 1946-9-4 13106 Sutter Colusa Gun Club Butte Sink Comment
  UC555536  Lotus purshianus var. purshianus H. L. Mason 1925-7-2 2140 Tuolumne Mather Sierra Nevada Mountains, Yosemite National Park Comment
  UC555524  Lotus stipularis var. ottleyi Herbert L. Mason 1927-5-10 3711 Butte ne of Oroville (Cherokee Mine); Table Mt. Comment
  UC1179050  Lotus strigosus Herbert L. Mason 1938-4-14 11707 Tulare 4 mi e Exeter Comment
  UC555413  Lotus strigosus H. L. Mason 1926-4-30 3115 Riverside 1 mi s Temecula; Temecula Canyon Comment
  UC1191767  Ludwigia peploides subsp. peploides Herbert L. Mason and Verne Grant 1946-8-14 13019 Butte canal near big pond on Sacramento Outing Club; Butte Sink, Sacramento Outing Club Comment
  CAS-BOT-BC201436  Lupinus albifrons var. albifrons H. L. Mason 1917-3-10 54 Marin Lake Temescal Comment
  UC1076229  Lupinus covillei Herbert L. Mason 1923-8-2 706 Tuolumne w Unicorn Creek (Yosemite National Park); Sierra Nevada, , w of Unicorn Creek Comment
  UC1039995  Lupinus lepidus var. confertus Herbert L. Mason 1936-7-12 11223 Mariposa Glacier Point road Peregoy Meadow (Yosemite National Park); Sierra Nevada, , Peregoy Meadow 2255 Comment
  UC1076242  Lupinus microcarpus var. microcarpus H. L. Mason 1928-5-6 4552 Alameda Cedar Mt Comment
  JEPS65414  Lupinus peirsonii Herbert L. Mason 1926-4-27 3026 Los Angeles Rock Creek; San Gabriel Mts.; Rock Creek, San Gabriel Mts., Los Angeles Co. Comment
  UC965563  Lupinus polyphyllus var. burkei Herbert L. Mason 1952-7-11 14326 Nevada 1 mi w University of California Trout Laboratory; Sierra Nevada, Sage Hen Creek 1981 Comment
  UC632763  Lupinus rivularis H. L. Mason 1938-7-28 12030 Tuolumne Macomb Ridge e Tilden Lake; Yosemite National Park, Macomb Ridge e of Tilden Lake 3048 Comment
Read comments
Jul 19 2018
  UC1081563  Lupinus truncatus Herbert L. Mason 1936-3-7 10994 San Luis Obispo 2 mi w of Nipomo; Nipomo Mesa Comment
  CAS-BOT-BC436725  Luzula comosa var. laxa Herbert L. Mason; Lawrence W. Reinecke 1937-7-22 11608 Tuolumne Yosemite National Park, Swamp Lakes, just W of Hetch Hetchy Dam and S of Miguel Meadow 1584 Comment
  UC1083104  Lycium andersonii Herbert L. Mason 1932-4-2 6893 Kern 3 mi w Muroc; Mojave Desert Comment
  UC1083109  Lycium cooperi Herbert L. Mason 1926-4-26 2969 Los Angeles Mint Canyon Road, summit of 1st grade San Gabriel Mts. Comment
  UC1191830  Lycopus americanus Herbert L. Mason 1945-9-18 12709 Sutter near bridge on Yuba City-Knight's Landing Hwy. Sutter By-pass Comment
  UC1111565  Lycopus uniflorus Herbert L. Mason 1938-8-1 12062 Tuolumne Yosemite National Park, in Tiltill Valley, Rancheria Mountain Trail Tiltill Valley; Sierra Nevada, Yosemite National Park, Tiltill Valley 1828 Comment
  UC555520  Lyonothamnus floribundus subsp. aspleniifolius Herbert L. Mason 1937-9-25 4109 Santa Barbara hills about Pelican Bay; Santa Cruz Island Comment
  UC1191565  Lythrum californicum Herbert L. Mason, S. Galen Smith 1948-7-29 8234 Merced about 4 mi n of Los Banos (just n of Delta Road, North Mercy Springs Road); North Mercy Springs Road Comment
  RSA0014830  Lythrum californicum H. L. Mason, Verne Grant 1946-8-7 12977 Colusa 8 miles north of Colusa; Butte Sink. Comment
  UC1191546  Lythrum hyssopifolia Herbert L. Mason, Verne Grant 1946-8-6 12973 Butte 2.7 mi n of colusa (between Sacramento River and Butte Creek, Butte Sink); Butte Sink Comment
  UC635145  Lythrum hyssopifolia H. L. Mason 1926-5-28 3257 El Dorado between Shingle Springs and Coloma (Sierra Nevada Foothills, Rose Springs (now known locally as Allan's)); Sierra Nevada Foothills, Rose Springs 396 Comment
  UCD102948  Lythrum tribracteatum H. L. Mason 1945-7-11 12645 Colusa Butte Lodge Outing Club, 3 miles above Colusa, near Butte Creek. Comment
  SEINET11601415 Image available Madia glomerata H. L. Mason 1952-7-19 14413 Nevada Sierra Nevada, Sage Hen Creek, meadow opposite University of California Trout Laboratory 1981 Comment
  UC1076267  Madia glomerata Herbert L. Mason 1932-9-9 7176 Placer Cisco Comment
  UC1191986  Madia glomerata Herbert L. Mason 1947-8-9 13483 Modoc n Alturas (e side of swamp); Fairchild Swamp Comment
  UC965582  Madia glomerata Herbert L. Mason 1952-7-19 14413 Nevada meadow opposite University of California Trout Laboratory; Sierra Nevada, Sage Hen Creek 1981 Comment
  UC1191163  Malacothamnus fremontii Herbert L. Mason November 1931 5893 Monterey s mi above Mission; Carmel River Comment
  UC565543  Malacothrix clevelandii Herbert L. Mason 1926-5-1 3171 San Diego Palomar Mt. Comment
  UC565510  Malacothrix floccifera H. L. Mason 1928-7-14 4906 Humboldt near Garberville; East Fork of Eel River Comment
  SEINET7881717 Image available Malacothrix floccifera H. L. Mason 1950-1 3355 Siskiyou Scott River, Scott Valley between Fort Jones and Etna 914 Comment
  UC1275794  Malacothrix glabrata Herbert L. Mason 1963-6-24 15214 Mono Paoha Island Mono Lake Comment
  JEPS36639  Malacothrix saxatilis var. arachnoidea Herbert L. Mason 1928-10-3 4986 Monterey 4 mi above Mission; Carmel River Comment
  UC555510  Malus fusca H. L. Mason 1932-7-21 7101 Humboldt Big Lagoon Comment
  UC635683  Marah watsonii H. L. Mason 1932-4-25 7004 Amador road from Ione to Latrobe Cosumnes River Bridge Comment
  CAS-BOT-BC422686  Meconella californica H. L. Mason 1928-2-22 4162 San Mateo San Bruno Mountains Comment
  UC1056972  Meconella californica Herbert L. Mason 1936-3-21 11038 Tuolumne head of Moccasin Creek Comment
  UC635484  Meconella oregana Herbert L. Mason 1927-4-16 3666 Contra Costa Wild Cat Canyon Berkeley Hills Comment
  SEINET12190917  Melaleuca nesophila E. Mason, Tebbett 1950-1 s.n. Los Angeles resort near Los Angeles Comment
  UC1110526  Melica aristata Herbert L. Mason 1939-7-12 12130 Tuolumne vicinity Swamp Lake (w of Hetch Hetchy Valley); Sierra Nevada Mtns, Yosemite National Park 1645 Comment
  UC936196  Melica californica H. L. Mason 1932-4-24 6983 Amador 3 mi s Ione Comment
  UCD87153  Melica californica Herbert L. Mason 1940-5-3 12265 Merced South Coast Ranges. Ortigalita Canyon, 2 miles NE of Ortigalita Peak. 304 Comment
  UCD88314  Melica stricta H. L. Mason 1939-7-26 14827 Tuolumne Mahan Peak, Yosemite National Park. 2438 Comment
  UC912653  Melica torreyana H. L. Mason 1926-5-26 3238 Alameda Niles Canyon Comment
  UC1191908  Mentha canadensis Herbert L. Mason 1947-8-12 13505 Modoc junction of North and South Forks of Pit River Alturas; jct of North and South Forks of Pit River Comment
  UC1714384  Mentha canadensis H. L. Mason 1929-8-24 5399 Mendocino Pudding Creek Slough near Fort Bragg; Pudding Creek Slough near Fort Bragg Comment
  UC1714389  Mentha canadensis H. L. Mason 1925-9-17 2226 Marin in stream bed at e end Lake Lagunitas; e end of Lake Lagunitas Comment
  UC634874  Mentha canadensis H. L. Mason 1929-8-24 5399 Mendocino Pudding Creek Slough near Fort Bragg; near Fort Bragg, Pudding Creek Slough Comment
  UC634877  Mentha canadensis H. L. Mason 1925-9-17 2226 Marin in stream bed at e end Lake Lagunitas; e end of Lake Lagunitas Comment
  UC672668  Mentzelia affinis H. L. Mason 1928-3-11 4241 Riverside near Indio (desert flats) Comment
  UC1077088  Mentzelia dispersa Herbert L. Mason 1938-7-11 11936 Tuolumne w Hetch Hetchy (Margin of lake at gravel pit, Miguel Meadow); Yosemite National Park 1584 Comment
  UC1191590  Mentzelia dispersa Herbert L. Mason, Verne Grant 1947-7-9 13317 Modoc Summit of Warner Range, Cedar Pass 1920 Comment
  UC672669  Mentzelia jonesii H. L. Mason 1932-4-1 6871 Los Angeles 1 m e Lancaster; Mohave Desert Comment
  UC672665  Mentzelia micrantha H. L. Mason 1928-4-29 4435 Contra Costa Mount Diablo, Sycamore Canyon Comment
  UC673369  Mentzelia veatchiana H. L. Mason 1930-4-20 5572 Kern between Mohave Lancaster (Hills) Comment
  UC1191160  Menyanthes trifoliata Herbert L. Mason 1937-7-24 14807 Tuolumne n of Hetch Hetchy Valley (Yosemite National Park, Vernon Lake); Sierra Nevada, Yosemite National Park, Vernon Lake 2011 Comment
  UC1191673  Menyanthes trifoliata Herbert L. Mason 1938-7-10 11924 Tuolumne w of Hetch Hetchy (south island in Swamp Lake, Yosemite National Park); Sierra Nevada, Yosemite National Park, Swamp Lake 1584 Comment
  CAS-BOT-BC428955  Micranthes californica H. L. Mason 1931-3-7 5807 Sonoma Vine Hill School, 12 miles west of Santa Rosa Comment
  CAS-BOT-BC322611  Micropus amphibolus H. L. Mason 1936-5-2 11098 Lake Barlett Mountain Road, four miles above Lucerne Comment
  UC673617  Micropus amphibolus H. L. Mason 1929-4-29 5247 Lake 2.9 mi w Lakeport (e base of road from Hopland to Lakeport) Comment
  CAS-BOT-BC348645  Micropus californicus var. californicus H. L. Mason 1936-4-13 11090 Tuolumne Italian Bar Comment
  UC581140  Micropus californicus var. californicus H. L. Mason 1933-5-29 7247 El Dorado Shingle Springs Comment
  UC672239  Micropus californicus var. californicus Herbert L. Mason 1933-4-30 7229 Lake near Aetna Springs Comment
  UC672244  Micropus californicus var. californicus Herbert L. Mason 1932-4-17 6957 Santa Clara near summit Pacheco Pass Comment
  UC672250  Micropus californicus var. californicus Herbert L. Mason 1932-4-25 7016 El Dorado Pilot Hill Sierra Nevada foothills Comment
  UC673614  Micropus californicus var. californicus Herbert L. Mason 1932-4-17 6936 Santa Clara hill 1 mi e New Almaden Comment
  UC964767  Micropus californicus var. californicus Herbert L. Mason 1938-4-14 11705 Tulare Rocky Hill 4 mi e Exeter; Rocky Hill, e of Exeter Comment
  CAS-BOT-BC348410  Micropus californicus var. californicus H. L. Mason 1932-4-17 6936 Santa Clara Hill, one mile east of New Almaden Comment
  UC672238  Micropus californicus var. californicus H. L. Mason 1933-4-21 7189 Santa Clara Hendrick's Road Comment
  UC672252  Micropus californicus var. californicus H. L. Mason 1933-5-28 7236 Placer Tahoe-Colfax road three to four mi Colfax Comment
  UC565499  Microseris douglasii subsp. douglasii H. L. Mason 1929-3-31 5142 Contra Costa Briones Valley Comment
  SEINET196201  Microsteris gracilis H. L. Mason 1926-5-29 3292 Nevada Crystal Lake 3 mi W of Cisco 1768 Comment
  UCD122219  Mimulus aurantiacus Steve Mason; Pam Rector 1993-4-16 1 Orange Laguna Niguel, Sea View Park Trail, end of trail behind blue rails and Ceanothus sp. Coastal sage scrub on bluff near housing development overlooking canyon and coastline. 182 Comment
  UC673541  Mimulus aurantiacus var. grandiflorus H. L. Mason 1930-10-25 5767 Monterey San Antonio River Comment
  UC672542  Mimulus bicolor H. L. Mason 1926-6-1 3364 Calaveras near Angels Camp Comment
  UC1056979  Mimulus breweri Herbert L. Mason 1936-7-25 11376 Tuolumne w Tioga Pass; Sierra Nevada, Yosemite National Park, Gaylor Lakes 3200 Comment
  UC1040000  Mimulus layneae Herbert L. Mason 1937-7-21 11559 Tuolumne n Hetch Hetchy; Sierra Nevada, Yosemite National Park, Miguel Meadows Comment
  UC1039602  Mimulus moniliformis Herbert L. Mason 1940-7-25 12336 Alpine hills n Kit Carson Pass 2682 Comment
  UC1275792  Mimulus nanus var. mephiticus Herbert L. Mason 1963-6-24 15209 Mono Paoha Island Mono Lake Comment
  UC632782  Mimulus tilingii H. L. Mason 1936-7-7 11159 Mariposa Hetch-Hetchy Trail w Dark Hole; Yosemite National Park, Research Reserve 2438 Comment
  UC1178809  Mimulus torreyi Herbert L. Mason 1939-7-8 12165 El Dorado Fallen Leaf Lake; ne end 1950 Comment
  UC632793  Mimulus torreyi H. L. Mason 1936-5-16 11127 Madera Chowchilla Mountain Comment
  UC1076480  Minuartia douglasii Herbert L. Mason 1927-6-11 3741 Los Angeles Mount Wilson San Gabriel Mountains 1524 Comment
  UC936172  Minuartia obtusiloba Herbert L. Mason 1936-7-24 11320 Tuolumne White Mountain Yosemite National Park, Conness Range. Comment
  UC936166  Minuartia rubella H. L. Mason 1936-7-23 11299 Tuolumne Alpine Slopes Mount Conness Comment
  JEPS22418  Mitella diversifolia Herbert L. Mason 1948-7-17 13593 Shasta along US Highway 299 just e Hatchet Mtn summit; just e of Hatchet Mtn summit Comment
  UC634841  Modiola caroliniana Herbert L. Mason 1926-5-15 3211 Alameda U. C. Campus, Berkeley Comment
  UC673536  Mohavea confertiflora H. L. Mason 1928-3-10 4246 Riverside Road from Indio to Palm Springs Comment
  UC2035859  Monardella odoratissima subsp. glauca H. L. Mason 1924-6-16 1043 Plumas South banks of Feather River, near Graeagle. Comment
  SEINET4173657 Image available Monardella undulata Herbert L. Mason, Annetta M. Carter 1938-5-18 1417 Marin Point Reyes Peninsula, 12 miles from Inverness Comment
  UC634925  Monardella undulata subsp. crispa H. L. Mason 1923-6-15 426 Santa Barbara Near Surf Comment
  UC1191419  Monolepis nuttalliana Herbert L. Mason and Verne Grant 1947-7-10 13339 Modoc 2 mi. e. Alturas (Dorris Reservoir); Dorris Reservoir Comment
  CAS-BOT-BC327817  Monolopia congdonii Herbert L. Mason 1935-4-30 9315 Kern 5 mi W of Bakersfield Comment
  SEINET10669043  Monolopia congdonii Herbert L. Mason 1935-1 Kern Comment
  JEPS35213  Monolopia major H. L. Mason 1932-3-20 Alameda plain e Mountain House (about 13 mi ne of Livermore) Comment
  CAS-BOT-BC349652  Monolopia stricta Herbert Mason 1940-3-24 12252 Fresno Four miles south of Firebaugh Comment
  UCR64592  Monolopia stricta H. L. Mason 1940-3-24 12252 Fresno 4 mi south of Firebaugh 51 Comment
  SBBG61103  Monolopia stricta H. L. Mason 1940-3-24 12252 Fresno ca. 4 mi S of Firebaugh Comment
  SEINET10801702  Monolopia stricta Herbert L. Mason 1940-3-24 Mason 12252 Fresno Four miles south of Firebaugh. Comment
  SEINET7545198  Monolopia stricta H. L. Mason 1935-1 9314 Kern 2 mi. West of Lost Hills, northwestern Kern County Comment
  UC672207  Monoptilon bellioides H. L. Mason 1928-3-10 4245 Riverside road from Indio to Palm Springs Comment
  UC1056974  Montia chamissoi Herbert L. Mason 1936-7-27 11384 Tuolumne Gaylor Lakes w of Tioga Pass (Yosemite National Park); Sierra Nevada, , Gaylor Lakes 3200 Comment
  UC635329  Montia chamissoi H. L. Mason 1923-8-7 721 Tuolumne Dana Fork of Tuolumne River, Yosemite National Park Tuolumne River; Sierra Nevada Mountains, Yosemite National Park, Tuolumne Ri Comment
  CAS-BOT-BC445198  Montia parvifolia H. L. Mason 1921-7-1 s.n. San Mateo Pescadero Creek Comment
  CAS-BOT-BC109004  Mucronea californica H. L. Mason 1923-6-23 553 Monterey Carmel River, ten miles above Carmel. Comment
  CAS-BOT-BC247571  Muhlenbergia asperifolia Herbert Louis Mason 1947-8-15 13542 Modoc Mouth of Crane Creek on Willow Ranch. Comment
  SACT001578  Muhlenbergia asperifolia Herbert Mason 1947-8-15 Modoc Mouth of creek on Willow Ranch, east of Goose Lake. Comment
Read comments
Aug 21 2013
  UC1105286  Muhlenbergia filiformis Herbert L. Mason 1938-7-10 11911 Tuolumne w Hetch Hetchy; Sierra Nevada, Yosemite National Park, Swamp Lake, South Isl 1645 Comment
  UC965497  Muhlenbergia filiformis Herbert L. Mason 1952-7-10 14312 Nevada old drained spagnum bog in meadow one mi w University of California Trout Laboratory; Sage Hen Creek 1981 Comment
  YM-YOSE66978  Muhlenbergia filiformis H. L. Mason 1938-7-10 11911 Tuolumne SWAMP LAKE RESEARCH RESERVE. SOUTH ISLAND. SWAMP LAKE Comment
  UC1108828  Muhlenbergia montana Herbert L. Mason 1938-7-22 11972 Tuolumne Vernon Lake Trail n Hetch Hetchy Valley; Sierra Nevada, Yosemite National Park 1981 Comment
  UC1101592  Muhlenbergia richardsonis Herbert L. Mason 1947-8-8 13467 Modoc sw margin of reservoir nw Alturas; Big Sage Reservoir Comment
  UC1111012  Muhlenbergia rigens Herbert L. Mason 1930-10-25 5746 Monterey Headwaters of the Arroyo Seco Santa Lucia Mountains Comment
  UC1093652  Muilla coronata Herbert L. Mason 1952-4-11 14259 San Bernardino flats 1/4 mi n Kramer Comment
  UC1083343  Muilla maritima Herbert L. Mason 1926-4-26 2946 Los Angeles Pocoima Wash foothills of San Gabriel Mountains Comment
  UC1083347  Muilla maritima Herbert L. Mason 1931-3-1 5795 Alameda Cow Hollow Comment
  UC1101360  Myosurus apetalus Herbert L. Mason 1953-6-16 14551 Sierra 1 mi s Beckwourth Buttes Comment
  UC1112279  Myosurus apetalus Herbert L. Mason 1952-7-11 14339 Nevada Sage Hen Creek, 1 mi w of University of California Trout Laboratory Sage Hen Creek; Sierra Nevada 1981 Comment
  CAS-BOT-BC392264  Myosurus apetalus Herbert L. Mason 1953-6-16 14554 Plumas Two miles east of Beckwourth Comment
  CAS-BOT-BC392267  Myosurus apetalus Herbert L. Mason 1952-7-17 14382 Plumas Sierra Nevada. Along Western Pacific tracks just south of Beckwourth. Sierra Valley 1524 Comment
  CAS-BOT-BC83287  Myosurus minimus Herbert L. Mason 1952-4-14 14263 Contra Costa 3.5 miles south of Byron. Comment
  CAS-BOT-BC83382  Myosurus minimus Herbert L. Mason 1952-4-26 14275 Stanislaus 3 miles east of the San Joaquin River, Hilmar Road near Crows Landing Road. Comment
  UC1101336  Myosurus minimus Herbert L. Mason 1952-4-26 14275 a Stanislaus 3 mi e of San Joaquin River (Hilmar Road near Crows Landing Road); Hilmar Road Comment
  UC1101342  Myosurus minimus Herbert L. Mason 1952-5-18 14294 Merced Santa Fe Grade e of Los Banos; Santa Fe Grade Comment
  UC1101344  Myosurus minimus Herbert L. Mason 1953-4-4 14504 Lake playa n of Lower Lake (Mannings Flat); Mannings Flat Comment
  UC1738079  Myosurus minimus H. L. Mason 1956-4-30 14274 A-3 Stanislaus 5 mi NE of Crows Landing ( on Crows Landing Rd.) 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
  CAS-BOT-BC83383  Myosurus minimus Herbert L. Mason 1952-5-18 14288 Stanislaus On Hilmar Road, east of the San Joaquin River about 1 mile from the junction with the Crows Landing Road. Comment
  POM312425  Myosurus minimus H. L. Mason 1953-4-2 14502 Fresno 5 miles Sof Kerman, Fresno County Comment
  POM312433  Myosurus minimus H. L. Mason 1952-5-18 14288 Stanislaus Near abandoned gas well,Hilmar Road east of the San Joaquin River about 1 mile from the jct. with the Crows Landing Road Comment
  UC634963  Myosurus minimus H. L. Mason 1933-5-28 7240 Placer Tahoe Meadows Comment
  UCD96309  Myosurus minimus Herbet L. Mason 1952-5-18 14290 Stanislaus on Hilmar road, east of the San Joaquin River about 1 mile from the junction with the Crows Landing road, near abandoned gas well. Comment
  UCD96580  Myosurus minimus Herbet L. Mason 1952-5-18 14288 Stanislaus near abandoned gas well, on Hilmar road, east of the San Joaquin River about 1 mile from the junction with the Crows Landing road. Comment
  UC1101349  Myosurus minimus subsp. apus Herbert L. Mason 1953-4-5 14510 a Colusa 3 mi e of Maxwell Comment
  POM312431  Myosurus minimus subsp. apus H. L. Mason 1952-5-18 14290 Stanislaus Near abandoned gas well,Hilmar Road east of the San Joaquin River about 1 mile from the jct. with the Crows Landing Road Comment
  POM312430  Myosurus minimus var. filiformis H. L. Mason 1952-4-26 14274 Stanislaus 3 miles east of the San Joaquin River; Hilmar Road near Crows Landing Road Comment
  POM312437  Myosurus sessilis H. L. Mason 1953-4-5 14510 Colusa 3 miles east of Maxwell Comment
  POM312445  Myosurus sessilis H. L. Mason 1953-4-5 14508 Colusa 3 miles east of Maxwell Comment
  UCD96287  Myosurus sessilis H. L. Mason 1952-4-14 14264 Contra Costa 3.5 miles south of Byron. Comment
  UC672604  Myrica californica Herbert L. Mason 1924-10-12 1113 Marin s.e. slope Mt. Tamalpais Comment
  UC672611  Myrica californica Herbert L. Mason 1928-7-11 4893 Sonoma canyon 2 mi. n. Fort Ross Comment
  LA205964  Myrica hartwegii Herbert L. Mason; 1936-7-11 11209 Mariposa Big Creek, a tributary of the South Fork of the Merced River, near Wawona 1402 Comment
  UCR139437  Myrica hartwegii H. L. Mason 1936-7-11 11209 Mariposa Sierra Nevada Mtns., Big Creek, a tributary of the South Fork of the Merced River, near Wawona 1402 Comment
  UC1191973  Myriophyllum aquaticum Herbert L. Mason and S. Galen Smith 1948-7-28 8231 Merced Dos Palos Comment
  UC1101492  Myriophyllum hippuroides Herbert L. Mason and S. Galen Smith 1948-7-27 8225 Merced W of salt slough, N of Los Banos, on Delta Road. Comment
  UC1101489  Myriophyllum hippuroides Herbert L. Mason and S. Galen Smith 1948-8-10 8314 Merced Mendota Pool, at entrance of Firebaugh canal, W side. Comment
  POM312985  Najas graminea H. L. Mason, Verne Grant 1946-8-15 13047 Butte #833 Irrigation Ditch, near caretaker s house, Greylodge Game Refuge, Butte Sink. 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
  CAS-BOT-BC456162  Najas guadalupensis Herbert L. Mason; Verne Grant 1946-8-15 13008 Colusa Two miles west of Colusa on Williams highway by bridge Comment
  UCD138159  Najas guadalupensis subsp. guadalupensis Herbert L. Mason; S. Galen Smith 1948-7-30 8254 Merced about 7 miles northeast of junction of Merced and San Joaquin Rivers. Comment
  UC672366  Nama demissa var. demissa Herbert L. Mason 1926-4-28 3077 San Bernardino Box S Ranch San Bernardino Mountains, Box S Ranch ((Box S Ranch), San Bernardino Mountains) Comment
  UC1051494  Nama depressa Herbert L. Mason 1952-4-11 14251 San Bernardino Black Lava Bed just e of Daggett; Black Lava Bed Comment
  UC1051484  Nama pusilla Herbert L. Mason 1952-4-11 14255 San Bernardino Black lavas n of Pisgah Crater; Black lavas Comment
  UC1101059  Narthecium californicum Herbert L. Mason 1950-7-15 14053 Trinity summit of grade Scott Mt. Comment
  UC769986  Nassella pulchra Herbert L. Mason 1934-3-25 7969 Sacramento Keithly Ranch Sacramento Valley, Rio Linda Comment
  CAS-BOT-BC60413  Nasturtium officinale Herbert L. Mason 1941-5-24 12424 Marin Tomales Point, one mile west of Indian Beach. 91 Comment
  SEINET8159127 Image available Nasturtium officinale H. L. Mason 1941-1 12424 Unknown Comment
  UC1199830  Navarretia atractyloides Herbert L. Mason 1946-6-8 12844 Santa Barbara s side Big Pine Mountain (Bluff Camp) Comment
  UC907793  Navarretia atractyloides Herbert L. Mason 1945-6-28 12591 Lake e of Middletown (just below the bridge) Comment
  UC909056  Navarretia atractyloides Herbert L. Mason 1927-7-31 3998 Santa Cruz hills s Mt. Herman Comment
  UC963801  Navarretia capillaris Herbert L. Mason Jul 7 1939-Jul 8 1939 12156 Nevada three mi w Donner Summit; w of Donner Summit 2072 Comment
  UC907877  Navarretia capillaris Herbert L. Mason 1932-9-9 7184 Calaveras w Ebbett's Pass (Sierra Nevada); , w of Ebbett's Pass Comment
  CAS-BOT-BC230276  Navarretia cotulifolia Herbert L. Mason 1945-5-12 12578 Lake E of Middletown, Locomono Creek Comment
  UC963810  Navarretia cotulifolia H. L. Mason 1933-4-30 7223 Napa n of Aetna Springs (near Napa-Lake county line); Inner North Coast Range Comment
  UCD48351  Navarretia cotulifolia H. L. Mason 1945-5-12 12578 Lake Meadow east of Middletown, Locomono Creek, Lake County, California. Comment
  UC963763  Navarretia divaricata Herbert L. Mason 1925-6-25 2112 Tuolumne Hog Ranch Mather 1432 Comment
  UC9637755  Navarretia divaricata Herbert L. Mason Jul 7 1939-Jul 8 1939 12150 Nevada 3 mi w Donner Summit 2072 Comment
  UC965531  Navarretia divaricata Herbert L. Mason 1952-8-16 14463 Nevada opposite Univ. of Calif. Trout Laboratory; Sierra Nevada, Sage Hen Creek 1981 Comment
  YM-YOSE65334  Navarretia divaricata Harry L. Mason 1938-7-6 11860 Tuolumne RIDGE BETWEEN SWAMP LAKE AND MIGUEL MEADOW 1676 Comment
  UCD39812  Navarretia divaricata Herbert L. Mason 1924-6-20 1087 Plumas Near Gold Lake on trail from Gold Lake to Graeagle camp. Comment
  SBBG58271  Navarretia hamata H. L. Mason 1941-7-21 12471 Santa Barbara mesa S of Casmalia Comment
  SEINET200255  Navarretia heterandra Herbert L. Mason 1953-6-8 14526 Lake Locomono Meadow, north of Middletown Comment
  UC908145  Navarretia intertexta H. L. Mason 1933-5-29 8243 El Dorado Shingle Springs, Sierra Nevada foothills Sierra Nevada Comment
  UC909093  Navarretia intertexta Herbert L. Mason 1940-5-21 12295 Sonoma Head of Mayacama Creek Knights Valley Comment
  UC908428  Navarretia intertexta Herbert L. Mason 1945-6-29 12613 Lake wash of Kelsey Creek Kelsey Creek Comment
  UCD48477  Navarretia intertexta H. L. Mason 1926-5-28 3260 El Dorado Rose Springs (Eggers), between Shingle Springs and Coloma, Sierra Nevada foothills, El Dorado County. 396 Comment
  UC965528  Navarretia intertexta subsp. propinqua Herbert L. Mason 1952-7-19 14444 Sierra 1.5 mi e Calpine (at junction of Calpine with Sierraville-Beckwourth road); Sierra Nevada, Sierra Valley 1524 Comment
  UC965533  Navarretia intertexta subsp. propinqua Herbert L. Mason 1952-8-16 14476 Nevada opposite University of California Trout Laboratory; Sierra Nevada, Sage Hen Creek 1981 Comment
  UC1199837  Navarretia intertexta subsp. propinqua Herbert L. Mason 1946-7-13 13445 Modoc s of Goose Lake (near Highway 395); Joseph Creek Comment
  UC965525  Navarretia intertexta subsp. propinqua Herbert L. Mason 1952-7-17 14377 Sierra between Sierraville and Loyalton; Sierra Nevada, Sierra Valley 1524 Comment
  UCD48414  Navarretia jaredii Herbert L. Mason 1946-6-7 12834 Santa Barbara Serpentine ridge between Camuesa Creek and Oso Creek, south of Little Pine Mountain. Santa Barbara County, California. 762 Comment
  HSC17139  Navarretia jepsonii H. L. Mason 1945-6-28 12595 Lake Just below bridge E of Middletown Comment
  SEINET197559  Navarretia jepsonii Herbert L. Mason 1952-6-19 14307 Colusa Mendocino National Forest; Black Diamond Ridge. 610 Comment
  UC908634  Navarretia jepsonii Herbert L. Mason 1946-5-30 12792 Lake near Middletown; Locomono Creek Comment
  UC971993  Navarretia jepsonii Herbert L. Mason 1952-6-19 14307 Colusa Black Diamond Ridge Mendocino National Forest 609 Comment
  UCD48317  Navarretia leucocephala subsp. bakeri Herbert L. Mason 1934-4-28 8094 Sonoma In fields; highway between Healdsburg and Santa Rosa, Sonoma County, California. Comment
  UC963803  Navarretia leucocephala subsp. minima Herbert L. Mason 1945-6-28 12599 Lake Excelsior Valley Comment
  UC965529  Navarretia leucocephala subsp. minima Herbert L. Mason 1952-7-19 14442 Sierra 1.5 mi e Calpine (at junction of Calpine with Sierra Beckwourth road); Sierra Nevada, Sierra Valley 1524 Comment
  UC700271 Image available Navarretia leucocephala subsp. pauciflora H. L. Mason 1945-5-12 12583 Lake 5 mi n Lower Lake; ; 5 mi. N of Lower Lake, Lake Co. Comment
  UCD48598  Navarretia leucocephala subsp. pauciflora H. L. Mason 1945-5-12 12584 Lake In beds of vernal pools, 3 miles north of Lower Lake, Lake County, California. Comment
  UC700273 Image available Navarretia leucocephala subsp. plieantha H. L. Mason 1945-6-29 12628 Lake Boggs Lake Mt. Hannah (nw slope of mt.); Boggs Lake, NW slope of Mt. Hannah, Lake Co. Comment
  UC1191635  Navarretia linearifolia subsp. linearifolia Herbert L. Mason 1947-8-8 13455 Modoc nw Alturas (Ingalls Swamp); n of Big Sage Reservoir, Ingalls Swamp Comment
  UC908262  Navarretia linearifolia subsp. pinnatisecta Herbert L. Mason 1945-6-29 12612 Lake near Kelseyville; wash of Kelsey Creek, near Kelseyville Comment
  SEINET197696  Navarretia minima Herbert L. Mason 1952-7-19 14442 Sierra 1.5 miles of Calpine at junction of Calpine with Sierraville-Beckworth road. 1524 Comment
  GH91333  Navarretia pauciflora H. L. Mason 1945-5-13 12583 Unknown Playa strewn with obsidion rubble and surrounded by chaparral, Lakeport highway 5 miles north of Lower Lake Comment
  SEINET200246  Navarretia pauciflora Herbert L. Mason 1953-6-8 14534 Lake Meadow west of Boggs Lake. Comment
  SEINET200248  Navarretia propinqua Herbert L. Mason 1946-7-13 13449 Modoc West end of Fandango Pass near Goose Lake on road to Fort Bidwell. Comment
  SEINET8729372 Image available Navarretia propinqua Herbert L. Mason 1952-1 14443 Sierra 1.5 miles east of Calpine at junction of Calpine with Sierraville-Beckwourth road. Sierra Valley 1524 Comment
  CAS-BOT-BC232653  Navarretia pubescens Herbert L. Mason 1945-5-12 12579 Lake Locomono Creek, E of Middletown Comment
  SEINET190450  Navarretia pubescens Herbert L. Mason 1940-5-3 12271 Merced Piedra Azul Creek, MW of Ortigalita Peak. 305 Comment
  UC908164  Navarretia pubescens Herbert L. Mason 1935-5-30 8330 Lake between Knoxville mine and Lower Lake Comment
  UCD59448  Navarretia pubescens Herbert L. Mason 1935-5-30 8330 Lake Between Lower Lake and Knoxville mine. Comment
  UC1178926  Navarretia tagetina Herbert L. Mason 1953-6-8 14528 Lake n of Middletown; Locomono Meadow Comment
  UC908083  Navarretia tagetina Herbert L. Mason 1934-4-30 8110 Napa tributary of Putah Creek Pope Valley, Putah Creek Comment
  UCD48635  Navarretia tagetina Herbert L. Mason 1934-4-30 8110 Napa Talus soil along road, tributary of Putah Creek, Pope Valley, Napa County, California. Comment
  UC1111588  Navarretia viscidula Herbert L. Mason 1947-5-18 14791 Tehama w of Paskenta (base of Paskenta Grade); Paskenta Grade Comment
  UCD39810  Navarretia vividior Herbert L. Mason 1941-7-12 12480 a Tuolumne Yosemite National Park, Miguel Meadows. 1889 Comment
Read comments
Aug 18 2015
  UC632801  Nemacladus interior H. L. Mason 1936-7-11 11198 Mariposa Wawona 1249 Comment
  UC635583  Nemacladus interior H. L. Mason 1923-7-12 577 Tuolumne Mather; Sierra Nevada Mountains, Yosemite National Park Comment
  SEINET10458402  Nemacladus longiflorus Mason 1926-4-30 Mason 3145 San Diego Oak Grove 853 Comment
  UC635592  Nemacladus longiflorus var. longiflorus H. L. Mason April 1926 3177 a San Diego Oak Grove Comment
  UCD126389  Nemacladus montanus Herbert L. Mason 1935-5-30 s.n. Napa 4 miles north of Knoxville Mines. Comment
  SEINET3815125 Image available Nemacladus ramosissimus Herbert L. Mason 1935-4-30 8281 b San Bernardino Poison Canyon Comment
  SEINET10461043  Nemacladus ramosissimus Mason 1935-4-30 Mason 8281 b San Bernardino Poison Canyon Comment
  UC1179026  Nemacladus rubescens Herbert L. Mason 1935-4-30 8281 c San Bernardino Head of Poison Canyon Comment
  UC595052  Nemophila parviflora H. L. Mason 1938-5-1 11746 Lake Bartlett Springs Comment
  UC592127  Nemophila pedunculata H. L. Mason 1929-3-15 5070 Santa Clara San Antonio Valley Mount Hamilton Range, San Antonio Valley Comment
  UC595054  Nemophila pedunculata H. L. Mason 1938-5-1 11744 Lake Barlett Springs Bartlett Springs Comment
  UC632810  Nemophila pedunculata H. L. Mason 1936-3-20 11010 Tuolumne three mi above Tuolumne; above Tuolumne Comment
  UC595050  Nemophila spatulata H. L. Mason 1938-7-15 11959 Tuolumne Tamarack Flat , Tamarack Flat (Yosemite National Park) 1950 Comment
  YM-YOSE65374  Nemophila spatulata Harry L. Mason 1938-7-11 11941 Tuolumne MIGUEL MEADOW 1584 Comment
  UC965518  Neoholmgrenia andina Herbert L. Mason 1952-7-11 14333 Nevada one mi w University of California Trout Laboratory; Sierra Nevada, Sage Hen Creek 1981 Comment
  UC570708  Nicotiana quadrivalvis Herbert L. Mason 1926-4-30 3147 San Diego Oak Grove Palomar Mt. (base of Palomar Mt) Comment
  UC570709  Nicotiana quadrivalvis H. L. Mason 1928-10-2 4974 Monterey 1 mi below Salinas (Salinas River); Salinas River Comment
  A356882  Notholithocarpus densiflorus H. L. Mason 1934-9-3 Unknown White plains, three miles east of Mendocino City Comment
  UC635508  Nuphar lutea subsp. polysepala H. L. Mason 1924-6-20 1089 Plumas in a lily pond near Greagle Lodge Comment
  UC672086  Odontostomum hartwegii Herbert L. Mason 1934-4-30 8102 Napa w. side near summit Wooden Valley Grade Comment
  UC673620  Odontostomum hartwegii Herbert L. Mason 1928-5-4 4517 El Dorado between Green Valley and Eggars Comment
  UC555685  Oemleria cerasiformis H. L. Mason 1923-6-22 533 San Luis Obispo Summit Cuesta Grade Comment
  UC1191943  Oenanthe sarmentosa Herbert L. Mason 1945-8-16 12657 Solano Grizzly Island near Suisun Bay; Grizzly Island Comment
  UC635276  Oenothera californica subsp. californica H. L. Mason 1926-5-1 3180 San Diego Oak Grove Comment
  UC634687  Oenothera primiveris subsp. primiveris H. L. Mason 1926-4-27 3074 San Bernardino near Victorville Comment
  UC1178895  Olsynium douglasii var. douglasii Herbert L. Mason 1949-4-16 13993 Modoc mesa e Alturas Comment
  CAS-BOT-BC349971  Oreostemma alpigenum var. andersonii Herbert L. Mason 1941-7-7 12510 Madera Sierra Nevada, Yosemite National Park. Just south of the Givens Lake trail junction 2865 Comment
  UC672295  Oreostemma alpigenum var. andersonii H. L. Mason 1923-7-28 654 Tuolumne White Wolf, Mather to Tuolumne Meadows (Tioga Pass Rd) Sierra Nevada Mts, Yosemite National Park 2438 Comment
  UC912304  Oreostemma alpigenum var. andersonii Herbert L. Mason 1933-9-2 7269 Amador Silver Lake Sierra Nevada Mountains Comment
  UC965584  Oreostemma alpigenum var. andersonii Herbert L. Mason 1952-7-11 14322 Nevada 1 mi w University of California Trout Laboratory; Sage Hen Creek 1981 Comment
  UC1076295  Orobanche bulbosa Herbert L. Mason 1923-6-19 518 Ventura above Ojai (Topatopa Mountains, Horn Canyon); Topatopa Mountains, Horn Canyon Comment
  SEINET199760  Orobanche californica subsp. californica Herbert L. Mason 1927-7-28 3983 San Mateo Pigeon Point Comment
  UC1199810  Orobanche corymbosa subsp. corymbosa Herbert L. Mason 1957-7-5 14715 Lassen Madeline Plains (town south of Madeline) Comment
  UC1076301  Orobanche fasciculata Herbert L. Mason 1926-5-7 2704 Contra Costa Near Summit of Mount Diablo. Comment
  UC1076307  Orobanche fasciculata Herbert L. Mason 1934-5-5 8115 Lake Plain southwest of Mount Konocti. Comment
  UC723026  Orobanche fasciculata Herbert L. Mason 1935-5-9 Stanislaus Red Mountains, Arroyo del Puerto, Mount Hamilton. Comment
  RSA0087777  Orobanche fasciculata Herbert L. Mason 1936-5-2 11099 Lake Four miles above Lucerne. Comment
  UC1076303  Orobanche fasciculata Herbert L. Mason 1926-5-28 1029 Tuolumne Near bottom of Tuolumne Canyon, Mather. Comment
  JEPS19479  Orobanche vallicola Herbert L. Mason 1929-9-21 5432 Contra Costa 3 mi. above Clayton (Marsh Creek Rd.) Comment
  JEPS38558  Osmadenia tenella H. L. Mason 1926-4-25 Orange Laguna Comment
  UC571124  Oxalis albicans subsp. pilosa Herbert L. Mason 1927-4-23 3677 a San Mateo between La Honda and Pescadero Summit of rd Comment
  UC634782  Oxypolis occidentalis H. L. Mason 1925-8-6 2208 Tuolumne near Mather (in bogs) Comment
  UC1081561  Packera cana Herbert L. Mason 1936-8-1 11478 Mono Leevining Canyon Sierra Nevada, Yosemite National Park, Leevining Canyon (Yosemite National Park, Sierra Nevada) Comment
  UC635429  Paeonia brownii H. L. Mason 1926-5-30 3327 a El Dorado Kit Carson Pass; e side, just below pass 2621 Comment
  UC635428  Paeonia californica H. L. Mason 1926-4-30 3149 San Diego Oak Grove 853 Comment
  UC565486  Palafoxia arida var. arida H. L. Mason 1928-3-10 4189 Riverside Whitewater River Comment
  UC1102972  Panicum acuminatum var. acuminatum Herbert L. Mason 1958-8-9 14871 Tuolumne w side Hetch Hetchy Dam (Swamp Lake Area); Sierra Nevada, Yosemite National Park, w side Hetch Hetchy d 1584 Comment
  UCD88711  Panicum acuminatum var. fasciculatum H. L. Mason 1958-8-6 14870 Tuolumne Yosemite National Park, NW of Hetch-Hetchy, Swamp Lake meadow. Comment
  UC1101582  Panicum dichotomiflorum subsp. dichotomiflorum Herbert L. Mason 1945-9-19 12720 Colusa 1 mi n Colusa (below causeway over Butte Sink spillway, e bank Sacramento River); e bank Sacramento River Comment
  UCD89966  Panicum rigidulum H. L. Mason 1958-8-6 14855 Tuolumne Yosemite National Park, NW of Hetch-Hetchy, Swamp Lake meadow. Comment
  SEINET11810400  Parthenium argentatum R. E. Mason 1944-1 s.n. Unknown Fort Banning Comment
  UC1085298  Parvisedum pumilum Herbert L. Mason 1957-5-1 El Dorado near Garden Valley (Georgetown); Georgetown Comment
  UC571153  Parvisedum pumilum H. L. Mason 1928-5-4 4506 El Dorado Greene Valley 4 mi n of Shingle Springs; Greene Valley Comment
  JEPS50028  Parvisedum pumilum H. L. Mason 1931-4-12 Napa Napa State Hospital Comment
  UC665655  Parvisedum pumilum Herbert L. Mason 1941-4-6 12409 Butte 3 mi s of Chico (near junction of road to Paradise, Sierra Nevada Foothills); Sierra Nevada Foothills 91 Comment
  SEINET4178439 Image available Paspalum dilatatum Herbert L. Mason 1948-7-30 8260 Stanislaus About 7 Miles South of Modesto on Crow's Landing road. Comment
  UC912651  Paspalum distichum H. L. Mason 1928-10-2 4975 Monterey Salinas River 1 mi below Salinas; Salinas River Comment
  POM313199  Paspalum distichum H. L. Mason 1945-9-18 12701 Sutter Margins of pools on overflow lands of Sutter By-pass near bridge on Yuba City-Knight's Landing highway. Comment
  UC1178983  Paxistima myrsinites Herbert L. Mason 1945-9-9 12697 Sierra s. of Downieville; Yuba R. Canyon Comment
  UC573064  Pectocarya penicillata H. L. Mason 5133 Contra Costa 2 mi above Clayton (Marsh Creek Rd) Comment
  UC573059  Pectocarya pusilla H. L. Mason 1929-4-25 5210 Contra Costa Briones Rd to Antioch Comment
  UC573062  Pectocarya pusilla H. L. Mason 1929-4-7 5180 Stanislaus bluffs ca 10 mi above Oakdale; Sierra Foothills Comment
  UC1191209  Pectocarya setosa Herbert L. Mason 1952-4-27 14279 San Benito San Carlos Canyon Comment
  UC573132  Pectocarya setosa Herbert L. Mason 1932-4-1 6889 Kern 5 mi s Muroc; Mojave Desert Comment
  JEPS23105  Pedicularis attollens H. L. Mason 1924-6-26 Plumas Blairsden Comment
  UC672550  Pedicularis groenlandica H. L. Mason 1922-7-25 328 Mariposa Porcupine Flat, Tioga Pass Road Porcupine Flat 2133 Comment
  UC672554  Pedicularis semibarbata H. L. Mason 1922-7-25 323 Mariposa Porcupine Flat, Tioga Pass Road Porcupine Flat 2133 Comment
  CAS-BOT-BC69293  Pellaea andromedifolia H. L. Mason; H. A. Borthwick 1921-3-20 s.n. Santa Clara Guadalupe Canyon Comment
  CAS-BOT-BC71395  Pellaea mucronata Miss. Mason 1892-1-1 s.n. Orange Orange Comment
  UC565585  Penstemon centranthifolius H. L. Mason 1926-4-27 3032 Los Angeles Rock Creek San Gabriel Mountains, Rock Creek Comment
  UC566684  Penstemon centranthifolius Herbert L. Mason 1923-6-23 540 Monterey 10 mi above Carmel (Carmel River); , above Carmel Comment
  UC565603  Penstemon deustus var. pedicellatus H. L. Mason 1931-5-9 5862 Siskiyou Shasta Creek Comment
  NY600734  Penstemon gracilentus H. L. Mason 1952-7-18 14394 Nevada Sage Hen Creek 2133.6 Comment
  NY601785  Penstemon heterophyllus var. purdyi H. L. Mason 1934-4-28 8071 Sonoma Head of Dohrman Creek, Jensen's Ranch Comment
  UC565577  Penstemon heterophyllus var. purdyi Herbert L. Mason 1926-5-28 3271 Placer 5 mi above Auburn; above Auburn Comment
  UC565596  Penstemon laetus var. laetus H. L. Mason 1923-7-14 599 Tuolumne Mather Sierra Nevada Mountains, , Mather (Yosemite National Park) Comment
  UC1083136  Penstemon rostriflorus Herbert L. Mason 1936-8-1 11485 Mono Leevining Canyon Sierra Nevada, Yosemite National Park Comment
  JEPS11384  Penstemon speciosus H. L. Mason 1924-6-26 1045 Plumas Blairsden Comment
  UC1028677  Pentachaeta alsinoides Herbert L. Mason 1933-4-21 7195 Santa Clara road above Smith's Creek (on slopes of Isabel Creek); Isabel Creek Comment
  UC1060666  Pentachaeta exilis Herbert L. Mason 1957-4-28 14693 El Dorado about 5 mi s Georgetown; Garden Valley 579 Comment
  UC1028678  Pentachaeta exilis Herbert L. Mason 1931-4-5 5826 Alameda road between Marsh Creek and Livermore Comment
  UC1076451  Pentagramma pallida Herbert L. Mason 1929-3-23 5093 Tulare 3 mi above Springville (Middle Tule River) Comment
  UC1179104  Peraphyllum ramosissimum Herbert L. Mason 13359 Modoc s of Alturas (on Highway 395) Comment
  UC1039642  Perityle emoryi Herbert L. Mason 1935-4-30 8293 San Bernardino sw Trona (Poison Canyon); Poison Canyon Comment
  UCD99380  Persicaria amphibia Herbert L. Mason 1946-7-27 12950 Lake Clear Lake, 2-3 miles north of Lakeport. Comment
  UCD99378  Persicaria amphibia Herbert L. Mason 1945-8-17 12665 Solano North of Rio Vista. Comment
  UCD99319  Persicaria hydropiperoides Herbert L. Mason; Verne Grant 1946-8-14 13027 Butte Sacramento Outing Club. Comment
  CAS-BOT-BC419350  Persicaria punctata Herbert L. Mason; S. Galen Smith 1948-8-9 8301 Merced 1 mile west of Los Banos Comment
  CAS-BOT-BC419413  Persicaria punctata Herbert L. Mason 1945-8-17 12664 Solano North of Rio Vista Comment
  UC566779  Petunia parviflora H. L. Mason 1929-10-13 5507 Monterey Bradley Salinas River (bridge over Salinas River) Comment
  UC570697  Petunia parviflora H. L. Mason 1928-10-2 4976 Monterey 1 mi below Salinas; Salinas River Comment
  UC672336  Phacelia breweri Herbert L. Mason 1926-4-11 2842 Alameda Rancho Repose Cedar Mountain Comment
  UC672427  Phacelia campanularia subsp. campanularia Herbert L. Mason 1928-3-10 4183 Riverside Snow Creek Colorado Desert, Whitewater River Valley Comment
  UC672412  Phacelia ciliata var. ciliata H. L. Mason 1932-3-19 6830 San Joaquin 2 mi e Midway Comment
  UC1093886  Phacelia crenulata var. ambigua Herbert L. Mason 1940-3-22 12241 Inyo Titus Canyon Death Valley National Monument, Grapevine Mountains (in washes) Comment
  UC672420  Phacelia distans Herbert L. Mason 1933-4-21 7202 Santa Clara n Mount Hamilton; Packard Ridge Comment
  UC672422  Phacelia distans Herbert L. Mason 1926-4-11 2844 Alameda Rancho Repose Cedar Mountain Comment
  RSA26548  Phacelia distans H. L. Mason 1930-4-20 1 Fresno Six miles from Coalinga on road to Priest Valley. Comment
  UC672424  Phacelia distans Herbert L. Mason 1926-3-14 2724 Napa sw slope Mt. St. Helena Comment
  UC672343  Phacelia douglasii Herbert L. Mason 1932-4-3 6917 Fresno on Priest Valley Rd 3 mi w Coalinga Comment
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Apr 13 2016
  UC672341  Phacelia douglasii Herbert L. Mason 1930-4-21 5606 Monterey Priest Valley Comment
  GH402987  Phacelia mohavensis H. L. Mason 1927-6-14 3767 Unknown Higher slopes of Mount San Antonio (Baldy) 2133 Comment
  UC672389  Phacelia parryi Herbert L. Mason 1926-4-25 2911 Orange 5 mi s Laguna 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
  GH401012  Phacelia phacelioides H. L. Mason 1938-5-3 11749 Unknown Trail between Juniper Camp and Deer Flat, Mount Diablo Comment
  UC1178991  Phacelia purpusii Herbert L. Mason 1947-7-8 13289 Shasta about 1.5 mi w Burney Comment
  CAS-BOT-BC154398  Phacelia ramosissima var. eremophila H. L. Mason 1939-7-18 12174 El Dorado north side of Luther Pass, one mile west of Grass Lake Meadow 2346 Comment
  UC753518  Phacelia ramosissima var. latifolia Herbert L. Mason 1946-6-7 12821 Santa Barbara Agua Caliente silt dam San Rafael Range 609 Comment
  CAS-BOT-BC159227  Phacelia ramosissima var. subglabra H. L. Mason 1939-7-18 12174 El Dorado north side of Luther Pass, one mile west of Grass Lake Meadow 2346 Comment
  UC581165  Phacelia rotundifolia H. L. Mason 1935-3-29 8223 San Bernardino w Searles Lake; Mojave Desert, Poison Canyon Comment
  UCD120692  Phacelia suaveolens Herbert L. Mason 1940-5-10 14805 Lake Obsidian pond, north of Lower Lake. Comment
  UC672351  Phacelia tanacetifolia Herbert L. Mason 1926-4-10 2807 Alameda Arroyo Mocho Canyon Cedar Mt. Comment
  UC753519  Phacelia viscida Herbert L. Mason 1946-6-7 12840 Santa Barbara road between Camuesa Creek and Hidden Potrero; San Rafael Range 914 Comment
  UC672388  Phacelia viscida Herbert L. Mason 1923-6-19 520 a Ventura in stream wash near Ojai Comment
  UC632824  Phalacroseris bolanderi H. L. Mason 1936-7-12 11244 Mariposa Peregoy Meadow Yosemite National Park, Glacier Point road 2255 Comment
  POM311162  Phalaris paradoxa H. L. Mason 1940-5-3 12252 Fresno Lyon & Hoag Ranch, 9 mi SE of South Dos Palos 30 Comment
  SEINET11671688  Phalaris paradoxa H. L. Mason 1940-1 12252 Fresno San Joaquin Valley, Lyon and Hoag Ranch, 9 mi SE of South Dos Palos 30 Comment
  SEINET4691194  Phalaris paradoxa H. L. Mason 1940-5-3 12252 Fresno San Joaquin Valley, Lyon and Hoag Ranch, 9 miles southeast of South Dos Palos 30 Comment
  UC964734  Phalaris paradoxa Herbert L. Mason 1940-5-3 12252 Fresno Lyon and Hoag Ranch, nine miles southeast of South Dos Palos Comment
  UC570852  Philadelphus lewisii Herbert L. Mason 1925-6-27 2127 Tuolumne Mather Comment
  UC1056437  Phleum alpinum Herbert L. Mason 1936-8-6 11506 Mariposa Yosemite National Park Glacier Point road Peregoy Meadow; Yosemite National Park, Glacier Point road, Peregoy Meadow 2255 Comment
  UC912643  Phleum pratense Herbert L. Mason 1925-7-11 2204 Tuolumne Mather Comment
  UC714201  Phlox caespitosa H. L. Mason 1936-7-31 11456 A Mono e of Saddlebag Lake; Sierra Nevada, Tioga Crest 3474 Comment
  UC909118  Phlox gracilis Herbert L. Mason 1928-4-13 4320 Marin n of San Rafael Comment
  UC909129  Phlox gracilis Herbert L. Mason 1925-3-23 1307 Alameda Sunol Comment
  UC1191161  Phlox gracilis Herbert L. Mason 1949-4-16 13995 Modoc e of Alturas Comment
  UC908608  Phlox gracilis Herbert L. Mason 1943-4-15 12563 Santa Clara w side Pacheco Pass (border of Santa Clara-Merced counties) Comment
  GH379816  Phoenicaulis cheiranthoides subsp. glabra H. L. Mason 1957-7-6 14720 Unknown Mill Creek, Warner Mountains Comment
  UC1039594  Phoradendron libocedri Herbert L. Mason 1925-7-12 2156 Tuolumne Yosemite Nat'l Park, Mather, Hog Ranch Sierra Nevada, Yosemite Nat'l Park, Mather, Hog Ranch 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
  CAS-BOT-BC452068  Phyllospadix torreyi Herbert L. Mason 1927-11-27 4145 Santa Barbara Carpinteria Comment
  UC566780  Physalis crassifolia H. L. Mason 1928-3-10 4185 Riverside Whitewater River Comment
  UC566778  Physalis pubescens var. integrifolia H. L. Mason Aug 1930 5713 Lake Clear Lake Comment
  UC555703  Physocarpus capitatus H. L. Mason 1925-9-17 2232 Marin Ross Valley to Lake Lagunitas Comment
  UC971915  Picea breweriana Herbert L. Mason 1950-7-16 14061 Siskiyou Road from Happy Camp <California> to Waldo, Oregon Comment
  UC1055936  Pilularia americana Herbert L. Mason 1952-4-14 14261 Contra Costa 3.5 mi s Byron Comment
  UC1077124  Pilularia americana Herbert L. Mason 1932-3-20 6851 Contra Costa Deer Valley Comment
  UC1083386  Pinus Herbert L. Mason 1941-3-27 12391 Santa Barbara Burton Mesa Pine Canyon, Burton Mesa (Pine Canyon, w Santa Barbara County) Comment
  UC1081572  Pinus albicaulis Herbert L. Mason 1936-7-27 11381 Tuolumne w Tioga Pass; Yosemite National Park, Gaylor Lakes 3200 Comment
  SEINET4457228 Image available Pinus albicaulis H. L. Mason 1936-1 11519 Unknown Comment
  UC1191116  Pinus attenuata Herbert L. Mason 1931-11-1 5894 Santa Cruz canyon above Greyhound Rock; Ano Nueva Point Comment
  NY34548  Pinus balfouriana H. L. Mason 1936-8-6 11519 Mono This specimen represents an endangered or threatened species. The specific locality has been removed from this record to protect this species from over-collection. These data may be supplied to researchers on request. Comment
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Sep 6 2011
  UC1061666  Pinus contorta Herbert L. Mason 1928-8-3 Del Norte Crescent City Comment
  NY49515  Pinus contorta H. L. Mason 1934-9-3 8146 Mendocino This specimen represents an endangered or threatened species. The specific locality has been removed from this record to protect this species from over-collection. These data may be supplied to researchers on request. Comment
  UC1083307  Pinus contorta subsp. bolanderi Herbert L. Mason 1928-8-25 4918 Mendocino Noyo Comment
  UC1061645  Pinus contorta subsp. murrayana Herbert L. Mason October 1932 El Dorado Lake Tahoe Comment
  UC1076347  Pinus contorta subsp. murrayana Herbert L. Mason 1929-10-4 5476 Placer Placerville road summit Johnson Pass Comment
  NY49718  Pinus contorta var. contorta H. L. Mason 1934-9-3 8148 Mendocino Just north of the town of Point Arena Comment
  UC1083327  Pinus lambertiana H. L. Mason 1923-6-18 495 Ventura Topa Topa Comment
  UC1061637  Pinus muricata Herbert L. Mason 1928-10-21 Mendocino Coastal Islets Little River Comment
  UC1083335  Pinus muricata Herbert L. Mason 1923-6-15 393 Santa Barbara road between Harris and Lompoc (summit of Harris Grade); Harris Grade Comment
  UC1083378  Pinus muricata Herbert L. Mason 1941-3-27 12387 Santa Barbara summit Harris Grade; sw Santa Barbara County, Purisima Ridge, Harris Grade Comment
  A246891  Pinus ponderosa H. L. Mason 1936-8-6 11519 Unknown hills between Saddlebag Lake and Conness Glacier, Sierra Nevada 3200 Comment
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Aug 12 2016
  UC699599  Pinus ponderosa H. L. Mason 1944-11-21 Alameda Codornices Park Berkeley Comment
  UC494900  Pinus remorata Herbert L. Mason 1927-9-25 4096 Santa Barbara summit of pass over ridge from West Ranch to Prisoner's Harbor; Santa Cruz Island; near Prisoner's Harbor, Santa Cruz Island. Comment
  UC673585  Piperia elongata H. L. Mason 1932-8-26 7163 Mendocino Pine Barrens Mendocino Comment
  CAS-BOT-BC136605  Piperia michaelii H. L. Mason 1921-6-20 s.n. Santa Clara Field redacted by CAS, contact the data manager for more information Comment
  UC573058  Plagiobothrys acanthocarpus H. L. Mason 1932-3-19 6828 San Joaquin 2 mi e Midway (Tracy highway) Comment
  UC1076514  Plagiobothrys canescens Herbert L. Mason 1938-4-14 11720 Tulare 4 mi w Exeter (Rocky Hill) Comment
  UC573060  Plagiobothrys chorisianus H. L. Mason 1927-4-23 3692 San Mateo between Pescadero Creek and La Honda Comment
  UCD120787  Plagiobothrys cognatus Herbert L. Mason; Verne Grant 1947-7-12 13408 Modoc Vernal pool; west side of the South Fork of Pit River Valley, southwest of Alturas. Comment
  UC1191845  Plagiobothrys cusickii Herbert L. Mason and Verne Grant 1947-7-12 13419 Modoc s of Alturas (along railroad track); Pit River Valley Comment
  UCD120801  Plagiobothrys cusickii Herbert L. Mason; Verne Grant 1947-7-12 13415 Modoc Near south end of west side road, Pit River Valley, south of Alturas. Comment
  UC965575  Plagiobothrys hispidulus Herbert L. Mason 1952-7-16 14364 Nevada one mi w University of California Trout Laboratory (peat meadow back of stream); Sierra Nevada, Sage Hen Creek 1981 Comment
  UC573081  Plagiobothrys infectivus H. L. Mason 1932-3-19 6829 San Joaquin Tracy Hwy 2 mi e Midway Comment
  POM312624  Plagiobothrys mollis H. L. Mason 1947-8-9 13475 Modoc East side of Fairchild Swamp, north of Alturas Comment
  CAS-BOT-BC58758  Plagiobothrys scouleri Herbert Louis Mason; Verne Grant 1947-7-12 13415 Modoc Pit River Valley, S of Alturas. Comment
  UC634851  Plagiobothrys stipitatus H. L. Mason 1927-5-9 3704 a Butte 12 mi w Oroville Comment
  CAS-BOT-BC58764  Plagiobothrys stipitatus var. micranthus Herbert Louis Mason; Verne Grant 1947-7-12 13410 Modoc W side of Pit River Valley, S of Alturas. Comment
  CAS-BOT-BC58766  Plagiobothrys stipitatus var. micranthus Herbert Louis Mason; Verne Grant 1947-7-12 13410 Modoc W side of Pit River Valley, S of Alturas. Comment
  UCD121009  Plagiobothrys stipitatus var. micranthus Herbert L. Mason; Verne Grant 1947-7-12 13410 Modoc West side of Pit River Valley, south of Alturas. Comment
  UC573155  Plagiobothrys tenellus Herbert L. Mason 1926-3-14 2737 Napa near summit Mount St. Helena Comment
  UC1111006  Plantago erecta Herbert L. Mason 1932-4-28 7038 Monterey Pajaro Hills Comment
  UC769969  Plantago erecta Herbert L. Mason 1934-3-25 7947 Sacramento Rio Linda, Keithly ranch Sacramento Valley 30 Comment
  RSA130694  Plantago lanceolata H. L. Mason 1917-04 s.n. Santa Clara Stanford Unversity. Comment
  UCD124519  Plantago major Herbert L. Mason 1945-8-24 12682 Lake East shore, Lower Lake. Comment
  UC571166  Platanus racemosa Herbert L. Mason with R. W. Chaney and F. W. Knowlton 1926-9-4 3637 Alameda 1 mi above Niles; Niles Canyon Comment
  CAS-BOT-BC91768  Platystemon californicus H. L. Mason 1929-3-24 5110 Madera Between Bates Station and O'Neal's at junction of Yosemite road, 18 miles east of Madera. Comment
  CAS-BOT-BC91874  Platystemon californicus H. L. Mason 1926-3-22 2793 Napa Between Calistoga and Petrified Forest. Comment
  UC912454  Plectritis ciliosa subsp. ciliosa Herbert L. Mason 1927-5-11 3731 Yuba near Dobbins 457 Comment
  UC964758  Plectritis ciliosa subsp. ciliosa Herbert L. Mason 1938-4-17 11738 Mariposa Hills near Cathay Comment
  UC912465  Plectritis macrocera H. L. Mason 1932-4-25 7006 Amador road Ione to Latrobe (Cosumnes River Bridge); Cosumnes River Bridge Comment
  UC1192102  Pluchea sericea Herbert L. Mason and S. Galen Smith 1948-8-18 8353 Kings canal just w Stratford; San Joaquin Valley Comment
  UCD90365  Poa annua H. L. Mason 1917-1-25 s.n. Santa Clara Stanford University. Comment
  UC1110534  Poa glauca subsp. rupicola Herbert L. Mason 1936-7-23 11312 Mono se of summit Mt Conness 3505 Comment
  CAS-BOT-BC255205  Poa pratensis Herbert L. Mason 1936-7-24 11331 Tuolumne White Mountain, Conness Range, Sierra Nevada Comment
  UC1108820  Poa secunda subsp. secunda Herbert L. Mason 1938-7-25 12005 Tuolumne deep lake at e base Mahan Peak; Sierra Nevada, Yosemite Nat'l Park Comment
  UC1190034  Poa unilateralis H. L. Mason 1921-5-28 San Mateo Pebble Beach near Pescadero Comment
  UC714386  Podistera nevadensis H. L. Mason 1936-7-28 11409 Mono Vicinity of Mount Dana Sierra Nevada, Dana Plateau 3505 Comment
  UC1988918  Pogogyne douglasii H. L. Mason Jun 1930 5683 Lake four miles east of Middletown Comment
  UC1191805  Pogogyne floribunda Herbert L. Mason 1947-8-9 13474 Modoc east side of Fairchild Swamp north of Alturas. Comment
  JEPS16753  Pogogyne serpylloides Herbert L. Mason 1934-5-5 8117 Lake Plain Southwest of Mount Konocti. Comment
  UC1988931  Pogogyne serpylloides H. L. Mason Apr 1930 5554 Calaveras Hills west of San Andreas Comment
  UC1988930  Pogogyne serpylloides H. L. Mason 1924-5-13 1014 Alameda Ridge south of Claremont Canyon, Berkeley Hills Comment
  UC570732  Pogogyne serpylloides H. L. Mason 1929-4-7 5167 Stanislaus six miles west of Oakdale Comment
  UC570734  Pogogyne serpylloides Herbert L. Mason 1924-5-13 1014 Contra Costa Ridge south of Claremont Canyon, Berkeley Hills Comment
  UC1988945  Pogogyne zizyphoroides H. L. Mason 1928-5-3 4476 Amador Hills near Carbondale Comment
  UC570730  Pogogyne zizyphoroides Herbert L. Mason 1928-5-3 4448 San Joaquin 4 miles north of Clements Comment
  UC908997  Polemonium carneum Herbert L. Mason 1929-5-10 5287 Del Norte on banks 2 mi n Smith River; n of Smith River Comment
  UC909080  Polemonium carneum Herbert L. Mason 1932-4-16 6932 Alameda summit <of road> Stonybrook Creek Comment
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May 31 2011
  UC714189  Polemonium eximium Herbert L. Mason 1936-7-24 11340 Tuolumne White Mountain Sierra Nevada, , White Mountain (Mount Conness Range) 3505 Comment
  UC909006  Polemonium occidentale Herbert L. Mason 1923-7-30 671 Tuolumne Tuolumne Meadows Dana Fork Tuolumne River, Tuolumne Meadows Comment
  CAS-BOT-BC231294  Polemonium pulcherrimum H. L. Mason 1936-7-24 11328 Tuolumne White Mountain, Mount Conness Range 3505 Comment
  UC714188  Polemonium pulcherrimum Herbert L. Mason 1936-7-24 11328 Tuolumne White Mountain Sierra Nevada, Mount Conness Range, White Mountain 3505 Comment
  CAS-BOT-BC167814  Polygala cornuta var. cornuta H. L. Mason 1926-5-29 3288 Nevada Donner Pass Road near Alta Comment
  UC1192335  Polygonum amphibium var. emersum Herbert L. Mason 1945-8-17 12665 Solano n Rio Vista Comment
  UC1101135  Polygonum amphibium var. stipulaceum Herbert L. Mason 1948-7-18 13613 Siskiyou Grass Lake Comment
  CAS-BOT-BC218107  Polygonum aviculare Herbert Louis Mason; Verne Grant 1947-7-18 8043 Modoc Eastside Canal, 5 mi N of Bayley's bridge, S of Alturas. Comment
  POM312904  Polygonum coccineum H. L. Mason 1928-9-30 4968 San Joaquin San Joaquin Delta near Holt. Comment
  CAS-BOT-BC414504  Polygonum douglasii Herbert L. Mason 1936-7-12 11229 a Mariposa Sierra Nevada, Yosemite National Park. Peregoy Meadow, Glacier Point road Comment
  SEINET3405793 Image available Polygonum douglasii Herbert L. Mason 1936-8-6 11509 Mariposa Yosemite National Park; Peregoy Meadow, Glacier Point road 2256 Comment
  YM-YOSE66373  Polygonum douglasii H. L. Mason 1938-7-11 11935 Tuolumne SWAMP LAKE RESEARCH RESERVE. GRAVEL PIT LAKE. MIGUEL MEADOW Comment
  UC1056967  Polygonum douglasii subsp. douglasii Herbert L. Mason 1936-7-29 11442 Mono cirque below Conness Glacier (w of Saddlebag Lake) 3200 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
  POM312533  Polygonum kelloggii H. L. Mason 1948-7-17 13599 Siskiyou Eastern Grass Lake. Comment
  UC1101143  Polygonum lapathifolium Herbert L. Mason and Verne Grant 1947-7-11 13372 Modoc irrigation ditch by Jones' Lane (off Hwy 395, s of Alturas) 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
  UC1178957  Polygonum minimum Herbert L. Mason 1932-9-9 7185 Alpine w Ebbett's Pass Comment
  UC1191122  Polygonum paronychia Herbert L. Mason 1924-10-19 1118 San Francisco Country Club Gate San Francisco, Merced Lake (in sand hills) Comment
  SEINET3399386 Image available Polygonum parryi Herbert L. Mason 1957-6-21 14709 Sierra Sierra Valley, 3 mi N of Satley Comment
  UC1101127  Polygonum persicaria Herbert L. Mason 1926-6-6 3376 Santa Cruz Felton San Lorenzo River Comment
  CAS-BOT-BC419873  Polygonum polygaloides subsp. confertiflorum Herbert L. Mason 1948-7-17 13595 Siskiyou Eastern Grass Lake Comment
  UC1191244  Polygonum polygaloides subsp. confertiflorum Herbert L. Mason 1948-7-17 13595 Siskiyou Eastern Grass Lake Comment
  UC1056968  Polygonum polygaloides subsp. kelloggii Herbert L. Mason 1936-7-29 11441 Mono cirque below Conness Glacier (w of Saddlebag Lake) 3200 Comment
  UC1060645  Polygonum polygaloides subsp. kelloggii Herbert L. Mason 1957-7-7 14729 Nevada sw Hobart Mills; Prosser Meadow Comment
  UC1191242  Polygonum polygaloides subsp. kelloggii Herbert L. Mason 1948-7-17 13599 Siskiyou Eastern Grass Lake Comment
  CAS-BOT-BC420026  Polygonum polygaloides subsp. kelloggii Herbert L. Mason 1952-7-10 14311 Nevada Sierra Nevada. One mile west of University of California Trout Laboratory (12 miles north of Truckee). Sage Hen [Sagehen] 1981 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
  CAS-BOT-BC420171  Polygonum sawatchense subsp. sawatchense Herbert L. Mason; Verne Grant 1947-7-9 13288 Shasta Highway 299, just east of Hatchet Creek summit 1219 Comment
  UC641803  Polygonum sawatchense subsp. sawatchense H. L. Mason 1936-7-31 11472 Mono near Saddlebag Lake; Sierra Nevada, Tioga Crest Comment
  UCD136935  Polypodium californicum Herbert L. Mason 1925-3-7 1279 Alameda Sunol. Comment
  UCD137006  Polypodium calirhiza Herbert L. Mason 1928-3-4 41696 Contra Costa Shell Ridge. Comment
  UCD136866  Polypodium glycyrrhiza Herbert L. Mason 1925-11-26 2498 Sonoma Monte Rio. Comment
  UC1093989  Polypodium scouleri Herbert L. Mason 1930-3-9 5522 Marin Pt. Reyes Comment
  UC672638  Polystichum imbricans subsp. imbricans H. L. Mason 1923-7-21 629 Tuolumne near summit of grade Hetch Hetchy R.R. Tracks; Sierra Nevada Mts., Yosemite Nat'l Park Comment
  SEINET3812422 Image available Porterella carnosula Herbert L. Mason 1953-7-19 14439 Sierra Margins of marshy pond 1.5 miles E os Calpine near junction of Sierraville-Beckwith road and Calpine road, Sierra Valley Comment
  UC1099894  Potamogeton crispus Herbert L. Mason, Verne Grant 1946-8-21 13068 San Joaquin sw of Holt; Trapper's Slough Comment
  CAS-BOT-BC452104  Potamogeton crispus Herbert L. Mason 1946-6-28 12877 Alameda San Leandro Creek 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
  POM313021  Potamogeton crispus H. L. Mason 1946-6-28 12877 Alameda San Leandro Creek. Comment
  UC1099884  Potamogeton diversifolius Herbert L. Mason, S. Galen Smith 1949-7-14 989 Fresno 2 mi w of Clovis (on road to Cameo) Comment
  UC1099889  Potamogeton diversifolius Herbert L. Mason 1945-6-29 12624 Lake Boggs Lake at base of Mount Hanna Comment
  UCD138275  Potamogeton diversifolius Herbert L. Mason 1948-6-10 13591 Merced Delta road, 3 miles east of Los Banos. Comment
  CAS-BOT-BC242249  Potamogeton epihydrus Herbert Louis Mason; Verne Grant 1947-7-12 13397 Modoc Jones' Lane, off Hwy 395, several mi. S of Alturas. Comment
  POM313023  Potamogeton foliosus H. L. Mason 1948-9-4 13636 Mono Rush Creek, Mono Lake. Comment
  UC1100038  Potamogeton foliosus Herbert L. Mason 1946-6-28 12878 Alameda San Leandro Creek Comment
  CAS-BOT-BC267167  Potamogeton foliosus H. L. Mason 1921-5-28 s.n. San Mateo Lagoon back of Near Years Pl Comment
  UC1099859  Potamogeton gramineus Herbert L. Mason 1937-7-22 11624 Tuolumne Swamp Lakes just s of Miguel Meadows (and w of Hetch Hetchy Dam); Yosemite National Park 1584 Comment
  UC1099907  Potamogeton gramineus Herbert L. Mason 1929-10-4 5467 El Dorado 14 mi from Tahoe City (w side of Lake Tahoe above Emerald Bay); Lake Tahoe Comment
  UC965618  Potamogeton gramineus Herbert L. Mason 1952-7-19 14456 Sierra 1.5 mi e of Calpine (at junction of Calpine with Sierraville-Beckwourth Road); Sierra Nevada, Sierra Valley 1524 Comment
  UC1099852  Potamogeton illinoensis Herbert L. Mason, S. Galen Smith 1948-8-19 8370 Merced bridge below Snelling; San Joaquin River Comment
  UC1099854  Potamogeton illinoensis Herbert L. Mason, Verne Grant 1946-8-21 13069 San Joaquin sw of Holt; Trapper's Slough Comment
  UC1195927  Potamogeton natans Herbert L. Mason 1958-8-9 14861 Tuolumne w side of Hetch Hetchy Dam (Swamp Lake); Sierra Nevada, Yosemite National Park 1584 Comment
  UC1178023  Potamogeton natans Herbert L. Mason 1946-7-24 12942 Marin Lakes Ranch Comment
  POM313007  Potamogeton nodosus H. L. Mason 1947-7-10 12640 Butte Sanford Slough, Butte Sink, southwest corner of Butte county. Comment
  UC1099837  Potamogeton pectinatus Herbert L. Mason, Verne Grant 1946-8-8 13000 Butte Reclamation Ditch 833 on West Gridley Road near Pennington Road Comment
  CAS-BOT-BC453930  Potamogeton pectinatus Herbert L. Mason; Verne Grant 1946-7-5 12903 Solano In Lake Chabot water reservoir just north of Vallejo Comment
  UC1099833  Potamogeton pectinatus Herbert L. Mason 1948-9-4 13672 Mono Junction of Highway 178 and Highway 395 Comment
  UC1102961  Potamogeton pusillus var. pusillus Herbert L. Mason 1958-8-9 14860 Tuolumne Swamp Lake w of Hetch Hetchy Dam; Sierra Nevada, Yosemite National Park 1584 Comment
  UC1100037  Potamogeton pusillus var. pusillus Herbert L. Mason 1947-8-8 13468 Modoc nw of Alturas (sw margin of Big Sage Reservoir); Big Sage Reservoir Comment
  UC1111026  Potamogeton robbinsii Herbert L. Mason 1958-8-9 14847 Tuolumne Swamp Lake w of Hetch Hetchy Dam; Sierra Nevada, Yosemite National Park 1584 Comment
  CAS-BOT-BC242269  Potamogeton zosteriformis Herbert Louis Mason; Verne Grant 1947-7-12 13384 Modoc Jones Lane, off Hwy 395, several miles S of Alturas. Comment
  UC555624  Potentilla anserina subsp. pacifica Herbert L. Mason 1927-4-24 3701 San Mateo mouth of San Gregorio Creek Comment
  CAS-BOT-BC143274  Potentilla flabellifolia H. L. Mason 1923-8-7 720 Tuolumne Dana Fork of Tuolumne River Comment
  UC555701  Potentilla gracilis var. fastigiata H. L. Mason 1923-8-21 753 Tuolumne n base Puppy Dome (Tuolumne Meadows); , n base of Puppy Dome Comment
  UC673335  Potentilla gracilis var. fastigiata Herbert L. Mason 1923-8-8 725 Tuolumne 0.5 mi from mouth, Dana Fork Tuolumne River, Yosemite National Park Moraine Creek; Sierra Nevada, Yosemite Natl Park, Dana Fork Tuolumne R Comment
  SEINET10542304  Potentilla palustris Herbert L. Mason 1940-7-25 Mason 12331 El Dorado Sphagnum bog in pinus jeffreyi and abies magnifica forest, grass lake, luther Pass 2377 Comment
  CAS-BOT-BC214802  Potentilla rivalis Herbert Louis Mason 1947-8-13 13518 Modoc NE side of F reservoir, N of Canby. Comment
  UC1191491  Potentilla rivalis Herbert L. Mason 1947-8-9 13476 Modoc n Alturas (e side of Fairchild Swamp); , n of Alturas Comment
  CAS-BOT-BC516334  Prosartes hookeri H. L. Mason 1917-4-4 75 Marin Tocaloma Comment
  POM275680  Prunus fasciculata var. fasciculata H. L. Mason 1935-5-1 10007 Kern Ridge south of Isabella. Comment
  A346505  Prunus fasciculata var. punctata H. L. Mason 1941-5-28 12403 Unknown north end of Nipomo mesa 76 Comment
  UC1093959  Prunus fasciculata var. punctata Herbert L. Mason 1936-3-7 10992 San Luis Obispo 2 mi w of Nipomo; Nipomo Mesa Comment
  UC665649  Prunus fasciculata var. punctata Herbert L. Mason 1941-3-28 12403 San Luis Obispo north end of Nipoma mesa Nipoma mesa 76 Comment
  GH346738  Prunus virginiana var. demissa H. L. Mason 1927-6-15 3777 Unknown San Gabriel Mountains 2590 Comment
  UC566663  Psathyrotes ramosissima H. L. Mason 1928-3-10 4224 Riverside Hidden Springs Canyon Coachella Mountains, Hidden Springs Canyon Comment
  UC632877  Pseudobahia heermannii H. L. Mason 1936-3-20 11012 Tuolumne 3 mi above Tuolumne Comment
  UC581138  Pseudognaphalium californicum H. L. Mason 1932-8-28 7170 Mendocino Point Arena Comment
  UC672202  Pseudognaphalium californicum H. L. Mason 1934-3-31 9708 Santa Barbara La Purisima Ridge Comment
  UC632820  Pseudognaphalium luteoalbum H. L. Mason 1936-4-12 11072 Amador near Lancha Plana; Mokelumne River Comment
  UC1083308  Pseudotsuga menziesii var. menziesii Herbert L. Mason 1926-1-1 2589 Mendocino Upper Lake to Elk Mt. Comment
  CAS-BOT-BC361773  Psilocarphus brevissimus var. brevissimus Herbert L. Mason 1952-7-19 14429 Nevada Sierra Nevada. Meadow opposite University of California Trout Laboratory. Sage Hen Creek 1981 Comment
  CAS-BOT-BC361776  Psilocarphus brevissimus var. brevissimus Herbert L. Mason 1952-7-17 14390 Plumas Sierra Nevada. Beckwourth. Sierra Valley 1524 Comment
  UC604417  Psilocarphus brevissimus var. brevissimus H. L. Mason 1934-5-5 8122 Lake e of Kelseyville (sw of the base of Mount Konocti) Comment
  UC912588  Psilocarphus brevissimus var. brevissimus Lucile Mason 1934-3-25 Sacramento Rio Linda Comment
  UC965546  Psilocarphus brevissimus var. brevissimus Herbert L. Mason 1952-7-19 14429 Nevada opposite University of California Trout Laboratory; Sierra Nevada, Sage Hen Creek 1981 Comment
  UC1111581  Psilocarphus brevissimus var. brevissimus Herbert L. Mason 1935-5-30 2837 Napa just s Napa State Hospital Comment
  UC1111607  Psilocarphus brevissimus var. brevissimus Herbert L. Mason 1938-5-6 11766 Monterey outside Jolon (at the junction to Indian Road, Santa Lucia Park) Comment
  POM312513  Psilocarphus oregonus H. L. Mason, Verne Grant 1947-7-13 13450 Modoc West end of Fandango Pass, near Goose Lake on road to Fort Bidwell. Comment
  UC604420  Psilocarphus oregonus H. L. Mason 1934-5-5 8133 Lake se of Kelseyville (near Hildebrand Ranch) Comment
  UC694145  Psilocarphus tenellus H. L. Mason 1932-4-24 6964 Contra Costa Marsh Creek Road Comment
  UC694148  Psilocarphus tenellus Lucile Mason 1934-3-25 Sacramento Rio Linda Comment
  UC694149  Psilocarphus tenellus H. L. Mason 1934-3-31 8045 Santa Barbara La Purisima Ridge Comment
  UC694160  Psilocarphus tenellus H. L. Mason 1933-4-17 7166 Alameda Stony Brook Comment
  UC694162  Psilocarphus tenellus Lucile Mason 1934-3-31 8040 Santa Barbara Lompoc Comment
  UC694155  Psilocarphus tenellus Lucile Mason 1934-4-1 Monterey Lucia Comment
  UC555339  Psorothamnus arborescens var. arborescens Herbert L. Mason 1926-4-27 3066 San Bernardino near Victorville; near Victorville Comment
  UC555342  Psorothamnus schottii Herbert L. Mason 1928-3-10 4218 Riverside Hidden Springs Canyon , Hidden Springs Canyon (Coachella Mts.) Comment
  UC571101  Ptelea crenulata H. L. Mason 1928-4-1 4270 Contra Costa hills n Mount Diablo (canyon back of Antioch hills) Comment
  UC635045  Pterostegia drymarioides H. L. Mason 1926-4-18 2864 San Francisco along coast San Francisco Comment
  UC1199845  Pyrola asarifolia Herbert L. Mason and L. W. Reinecke 1937-7-22 11613 Tuolumne Swamp Lakes, south of Miguel Meadows in the hills just west of Hetch Hetchy dam, Yosemite National Park 1584 Comment
  UC1083179  Quercus X morehus H. L. Mason 1924-11-15 1132 Marin Willow Creek Comment
  UC1076083  Quercus agrifolia Herbert L. Mason 1926-9-12 3638 Marin Lake Lagunitas Comment
  UCD45055  Quercus agrifolia Herbert L. Mason 1938-5-8 11809 Santa Barbara Vicinity of the summit of Figueroa Mountain, Santa Barbara County. Comment
  UC1083142  Quercus chrysolepis Herbert L. Mason 1928-10-3 4990 Monterey 10 mi from the Mission; Carmel River Comment
  UC1083195  Quercus chrysolepis Herbert L. Mason 1928-10-3 4990 Monterey 10 mi from the Mission; Carmel River Comment
  UC1083144  Quercus douglasii Herbert L. Mason 1928-5-4 4495 El Dorado near Latrobe (Swift Ranch) Comment
  UCD54402  Quercus lobata Herbert L. Mason 1929-10-12 5489 San Luis Obispo San Luis Obispo Co: 5.2 miles from Atascadero. Comment
  UCD47141  Quercus parvula var. shrevei Herbert L. Mason 1929-12-1 5513 Santa Cruz Swanton, Santa Cruz County. 304 Comment
  UCD47350  Quercus tomentella Herbert L. Mason 1927-9-25 4102 Santa Barbara Occasional in forests end canyons. Pass from West Ranch to Prisoner's Harbor, Santa Cruz Island, Santa Barbara County. Comment
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Apr 29 2014
  UC1083222  Quercus vacciniifolia Herbert L. Mason 1932-7-21 7108 Humboldt on road from Arcata to Weaverville (e slope of Southfork Mountains); Southfork Mountains Comment
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Oct 6 2006
  UC1199514  Quercus vacciniifolia Herbert L. Mason 1929-10-4 6573 El Dorado hills above Glen Alpine; Fallen Leaf Lake Comment
  UC1076081  Quercus wislizeni H. L. Mason 1924-10-12 1111 Marin s slope Mt. Tamalpais Comment
  UC1083224  Quercus wislizeni Herbert L. Mason Nov 1931 5895 Santa Cruz canyon above Greyhound Rock; Ano Nuevo Point Comment
  UCD47622  Quercus wislizeni Herbert L. Mason 1923-6-15 402 Santa Barbara Harris Grade, Santa Barbara County. 1828 Comment
  CAS-BOT-BC362884  Raillardella scaposa Herbert L. Mason 1938-7-28 12028 Tuolumne Sierra Nevada, Yosemite National Park. Macomb Ridge east of Tilden Lake 3048 Comment
  CAS-BOT-BC379448  Ranunculus alismifolius var. hartwegii H. L. Mason 1926-5-30 3327 El Dorado Kit Carson Pass 2621 Comment
  UC1101368  Ranunculus aquatilis var. capillaceus Herbert L. Mason and Verne Grant 1947-7-9 13290 Lassen 5 mi e Bieber (irrigation ditch) Comment
  UC1101372  Ranunculus aquatilis var. capillaceus Herbert L. Mason 1946-7-24 12940 Marin near Double Point; Lake Ranch Comment
  CAS-BOT-BC378901  Ranunculus californicus var. californicus H. L. Mason 1917-2-9 25 Alameda Berkeley Hills Comment
  UC635097  Ranunculus canus var. canus H. L. Mason 1929-3-15 5055 Contra Costa on summit of hill east of Nortonville Comment
  UC1101379  Ranunculus cymbalaria var. saximontanus Herbert L. Mason 1948-9-4 13647 Mono Rush Creek Mono Lake Comment
  POM312417  Ranunculus cymbalaria var. saximontanus H. L. Mason 1947-8-15 13552 Modoc Mouth of Crane Creek on Willow Ranch, east side of Goose Lake. Comment
  UC1101374  Ranunculus flammula Herbert L. Mason 1945-8-24 12669 Lake Boggs Lake Comment
  POM268684  Ranunculus flammula var. ovalis H. L. Mason 1945-8-24 12669 Lake Boggs Lake, NW base of Mt. Hanna Comment
  POM269513  Ranunculus orthorhynchus var. bloomeri H. L. Mason 1928-3-24 4266 Marin Millerton, Tomales Bay, Marin County Comment
  UCR139438  Ranunculus orthorhynchus var. orthorhynchus H. L. Mason 1923-7-13 588 Tuolumne Sierra Nevada Mtns., Hog Ranch (Mather) 1400 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
  POM285054  Ranunculus uncinatus var. parviflorus H. L. Mason 1952-7-16 14354 Nevada Sage Hen Creek, 1 mile W of University of California Trout Laboratory. 1982 Comment
  A378180  Rhamnus alnifolia H. L. Mason 1939-8-3 12200 Unknown Squaw Valley 7 miles northeast of Tahoe City 1889 Comment
  CAS-BOT-BC59530  Rhamnus alnifolia H. L. Mason 1939-8-3 12200 Placer Squaw Valley 7 miles northwest of Tahoe City 1889 Comment
  UC672654  Rhamnus californica Herbert L. Mason Nov 1931 5886 Monterey road between Monterey and Carmel Comment
  UC570983  Rhamnus californica subsp. californica Herbert L. Mason 1923-7-14 423 Santa Barbara Gaviota Pass Comment
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Apr 2 2007
  UC570994  Rhamnus crocea Herbert L. Mason 1923-6-14 416 Santa Barbara Gaviota Pass Comment
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Apr 2 2007
  GH378340  Rhamnus crocea var. ilicifolia H. L. Mason 1929-10-12 5493 Unknown Morro Creek drainage, 8.4 miles west of Atascadero Comment
  UC570990  Rhamnus ilicifolia Herbert L. Mason 1926-5-28 3265 Placer near Auburn Comment
  UC570992  Rhamnus ilicifolia Herbert L. Mason 1929-3-23 5085 Tulare 3 mi above Springville; Middle Tule River Comment
  UC1093873  Rhamnus rubra Herbert L. Mason 1938-7-25 12003 Tuolumne s base Mahan Peak (Deep Lake, Jack Main Canyon, Yosemite National Park, Sierra Nevada); Sierra Nevada, Yosemite National Park, Deep Lake 2438 Comment
  UC571001  Rhamnus rubra Herbert L. Mason 1925-7-16 2172 Tuolumne Mather 1432 Comment
  UC570981  Rhamnus tomentella subsp. tomentella Herbert L. Mason 1923-6-16 439 Santa Barbara La Cumbre Peak Comment
  GH363065  Rhododendron macrophyllum H. L. Mason 1930-06-01 - 1930-07-01 5632 Unknown Fort Bragg Comment
  UC571072  Rhododendron occidentale H. L. Mason 1925-6-29 2137 Tuolumne Lake Eleanor 1432 Comment
  CAS-BOT-BC170443  Rhus integrifolia H. L. Mason 1926-4-26 2943 Los Angeles Pacoima Wash, foothills of San Gabriel Mountains Comment
  UC635197  Rhus integrifolia H. L. Mason 1926-4-26 2943 Los Angeles Pacoima Wash, foothills of San Gabriel Mountains Comment
  UC635192  Rhus ovata H. L. Mason 1923-6-16 430 Santa Barbara Rattlesnake Canyon between Santa Barbara and La Combre Peak; Rattlesnake Canyon Comment
  UC1100685  Rhynchospora californica Herbert L. Mason 1946-7-4 12881 Sonoma between Santa Rosa and Forestville; Pitkin Marsh Comment
  UCD141234  Rhynchospora capitellata Herbert L. Mason 1946-7-4 12881 Sonoma Pitkin Marsh, between Santa Rosa and Forestville. Comment
  UC1093896  Ribes amarum Herbert L. Mason 1938-5-8 11796 Santa Barbara vicinity of summit Figueroa Mountain Comment
  UC570838  Ribes californicum Herbert L. Mason 1926-3-7 2709 Contra Costa Summit Mt. Diablo Comment
  UC570839  Ribes californicum Herbert L. Mason 1925-12-31 2566 Lake Bartlett Mountain Road Comment
  UC570835  Ribes cereum Herbert L. Mason 1926-5-30 3324 Alpine Kit Carson Pass road 1889 Comment
  UC1191512  Ribes divaricatum var. pubiflorum Herbert L. Mason 1946-7-24 12927 Marin second lake s Bear Valley (on road to Lake Ranch) Comment
  UC570821  Ribes malvaceum Herbert L. Mason 1924-11-23 1168 Contra Costa Las Trampas Ridge Comment
  UC1191514  Ribes menziesii Herbert L. Mason 1946-7-24 12920 Marin 2.8 mi n Lake Ranch (first lake s of Bear Valley) Comment
  UC570976  Ribes nevadense Herbert L. Mason 1926-5-1 3164 San Diego Sourdough Spring Palomar Mt. Comment
  UC570967  Ribes sanguineum Herbert L. Mason 1929-9-1 5407 Mendocino 3 mi n Fort Bragg Comment
  CAS-BOT-BC209379  Ribes sanguineum var. glutinosum H. L. Mason 1917-2-2 19 Alameda Berkeley Hills Comment
  UC570964  Ribes sanguineum var. glutinosum Herbert L. Mason 1925-9-12 2224 Contra Costa head San Leandro Canyon; Oakland Hills Comment
  CAS-BOT-BC168679  Ribes speciosum Herbert L. Mason 1921-5-7 s.n. Monterey Rancho del Monte, Carmel River Comment
  UC570959  Ribes speciosum H. L. Mason 1934-3-31 8056 San Luis Obispo See Canyon Pecho Hills Comment
  UC570960  Ribes speciosum Herbert L. Mason 1929-10-12 5485 San Luis Obispo 4.3 mi w Atascadero; Atascadero Creek Comment
  UCD102512  Ribes speciosum H. L. Mason 1920-5-1 s.n. Unknown County and location unknown. Comment
  UC632843  Rigiopappus leptocladus H. L. Mason 1936-5-15 11113 Mariposa three mi above Coulterville Comment
  CAS-BOT-BC92205  Romneya trichocalyx H. L. Mason 1923-6-18 514 Ventura Red Reef Canyon, Topatopa Mountains. Comment
  JEPS19652  Rorippa subumbellata H. L. Mason 1939-8-2 12197 El Dorado near the mouth Upper Truckee River; s end Lake Tahoe, nr mouth Upper Truckee River 1898 Comment
  UC1077122  Rorippa subumbellata Herbert L. Mason 1939-8-2 12197 El Dorado near mouth Upper Truckee River (s end Lake Tahoe); , near mouth Upper Truckee River 1920 Comment
  UC555666  Rosa californica H. L. Mason 1930-10-25 5771 Monterey banks of river between Jolon and Santa Lucia Ranger Station; San Antonio River Comment
  UCD113421  Rosa californica Herbert L. Mason; Verne Grant 1947-6-26 13261 Solano Cordelia Slough, Suisun Marsh. Comment
  UC555674  Rosa californica H. L. Mason 1929-10-12 5498 San Luis Obispo 10 mi w Atascadero Comment
  RSA0016981  Rotala ramosior H. L. Mason 1936-7-15 11256 Tuolumne Margin of pool, 1/2 mile W of Mather 1372 Comment
  UC555499  Rubus spectabilis H. L. Mason June 1930 5627 Mendocino Fort Bragg Comment
  RSA112365  Rubus spectabilis var. franciscanus H. L. Mason 1922-3-29 s.n. Santa Cruz Liddell Creek near mouth of canyon. Comment
  UC1101200  Rumex conglomeratus Herbert L. Mason 1946-7-24 12930 Marin second lake s on road to Lake Ranch Bear Valley Comment
  CAS-BOT-BC433491  Rumex fueginus Herbert L. Mason; Verne Grant 1947-7-11 13362 Modoc On Highway 395, 5 miles south of Alturas. Comment
  CAS-BOT-BC211302  Rumex lacustris Herbert Louis Mason; Verne Grant 1947-7-10 13336 Modoc Dorris Reservoir, 2 mi E of Alturas. Comment
  CAS-BOT-BC211350  Rumex lacustris Herbert Louis Mason; Verne Grant 1947-8-27 8309 Modoc South end of Clear Lake. Comment
  UC1191274  Rumex maritimus H. L. Mason 4981 Monterey 1 mi below Salinas; Salinas River Comment
  UC1191272  Rumex maritimus Herbert L. Mason and Verne Grant 1947-7-11 13362 Modoc 5 mi s Alturas (on Highway 395) Comment
  UC1083116  Rumex paucifolius Herbert L. Mason 1936-7-29 11430 Mono w of Saddlebag Lake (cirque below Conness Glacer) 3200 Comment
  UC1101221  Rumex salicifolius var. lacustris Herbert L. Mason 1947-8-9 13482 Modoc n of Alturas (e side of Fairchild Swamp); Fairchild Swamp Comment
  UC1101220  Rumex salicifolius var. lacustris Herbert L. Mason 1947-8-15 13556 Modoc e of Goose Lake (on Willow Ranch); Mouth of Crane Creek Comment
  UC1191315  Rumex violascens Herbert L. Mason 1947-6-26 13255 Solano Suisun Marshes Comment
  UC555350  Rupertia physodes H. L. Mason 1926-5-26 3241 Alameda Niles Canyon Comment
  UC1100030  Ruppia maritima Herbert L. Mason 1923-10-6 770 Solano Suisun Marsh Comment
  CAS-BOT-BC445666  Sagittaria cuneata Herbert L. Mason 1945-6-29 12623 Lake Boggs Lake at base of Mount Hanna Comment
  UC1051438  Sagittaria cuneata Herbert L. Mason 1955-8-13 14647 a Lassen Willow Creek Valley Comment
  UCD138008  Sagittaria cuneata Herbert L. Mason 1947-8-12 13506 Modoc Junction of North and South forks of Pit River, Alturas. Comment
  CAS-BOT-BC445727  Sagittaria latifolia Herbert L. Mason; Verne Grant 1946-8-14 13040 Butte Butte Sink Comment
  UC935728  Sagittaria latifolia Herbert L. Mason and S. Galen Smith 1948-8-18 8357 Merced just w Dos Palos; San Joaquin Valley Comment
  UC935746  Sagittaria latifolia Herbert L. Mason and Verne Grant 1946-8-14 13020 Butte Butte Sink; canal near big pond on Sacramento Outing Club Comment
  UCD138041  Sagittaria latifolia Herbert L. Mason 1945-9-19 12713 Colusa Sacramento river, 1 mile north of Colusa on east side, below causeway. Comment
  UC935715  Sagittaria longiloba Herbert L. Mason and S. Galen Smith 1948-8-10 8313 Fresno ditch adjacent to Mendota Canal (sw of Firebaugh); San Joaquin Valley, adjacent to Mendota Canal Comment
  UC935729  Sagittaria montevidensis subsp. calycina Herbert L. Mason and Verne Grant 1946-8-15 13007 Sacramento irrigation ditch w Rio Linda; w of Rio Linda Comment
  UC935731  Sagittaria montevidensis subsp. calycina Herbert L. Mason 1948-6-29 13579 Merced 5 mi n Volta; San Joaquin Valley Comment
  UC935733  Sagittaria montevidensis subsp. calycina Herbert L. Mason and S. Galen Smith 1948-8-11 8322 Merced s of junction of Merced and San Joaquin Rivers (Crane Ranch); San Joaquin Valley, s of jct of Merced and San Joaquin River Comment
  UC935778  Sagittaria sanfordii Herbert L. Mason and S. Galen Smith 1948-8-10 8318 Fresno at entrance of Firebaugh canal w side Mendota Pool; San Joaquin Valley, Mendota Pool Comment
  UCD138071  Sagittaria sanfordii Herbert L. Mason; Verne Grant 1946-8-8 13001 Butte West Gridley road one mile west of Gridley - Pennington Highway. Comment
  UC672595  Salazaria mexicana H. L. Mason 1926-4-26 2981 Los Angeles Vincent to Palmdale; Vincent to Palmdale Comment
  UC1191412  Salicornia europaea Herbert L. Mason 1946-7-29 12956 -A Sonoma 0.5 mi n Sears Point Comment
  SEINET200131  Salicornia pacifica H. L. Mason, GL Smith 1948-8-9 8277 Santa Clara About 8 mi W of Gilroy Comment
  UCD99148  Salicornia pacifica H. L. Mason; Malcolm A. Nobs 1948-12-11 714 Santa Clara at north base of Pacheco Pass. Comment
  CAS-BOT-BC103714  Salix eastwoodiae H. L. Mason 1923-7-29 668 Tuolumne Dana Fork, Tuolumne Meadows Comment
  UC1179058  Salix exigua var. hindsiana Herbert L. Mason 1947-3-29 13159 Colusa ca. 3 mi n.e. Colusa (Butte Sink, along Butte Creek) Comment
  CAS-BOT-BC125921  Salix planifolia H. L. Mason 1922-7-31 337 Tuolumne Lyell Fork of Tuolumne River 2438 Comment
  CAS-BOT-BC125952  Salix scouleriana H. L. Mason 1926-1-1 2588 Lake Near summit of Elk Mountain Comment
  UC748763 Image available Saltugilia australis Herbert L. Mason 1926-5-2 3195 Riverside Temecula Valley; ; Temecula Valey, Riverside Co. Comment
  UC909119  Saltugilia splendens subsp. splendens Herbert L. Mason 1926-4-27 3037 Los Angeles Rock Creek San Gabriel Mts., Rock Creek Comment
  UC634918  Salvia leucophylla H. L. Mason 1923-6-16 432 Santa Barbara between La Cumbre Peak and Santa Barbara (Rattlesnake Canyon); Rattlesnake Canyon Comment
  CAS-BOT-BC221117  Salvia sonomensis H. L. Mason 1928-5-4 4497 El Dorado Dugars, 3 miles north of Latrobe Comment
  POM199581  Salvia sonomensis H. L. Mason 1932-4-24 s.n. Amador 3 miles S of Ione Comment
  UC634915  Salvia sonomensis H. L. Mason 1928-5-4 4497 El Dorado 3 mi n Latrobe (Dugars) Comment
  UC634919  Salvia spathacea H. L. Mason 1923-6-15 389 Santa Barbara Harris Grade; La Purisima Ridge Comment
  UC525883  Sambucus mexicana H. L. Mason 1925-6-27 2128 Tuolumne Mather Comment
  UC1076263  Sambucus mexicana Herbert L. Mason 1929-10-12 5491 San Luis Obispo 8.4 mi from Atascadero Comment
  UC912452  Sambucus racemosa var. racemosa Herbert L. Mason 1924-11-16 1156 Marin lowlands back of dunes; Willow Camp Comment
  UC1178021  Samolus parviflorus Herbert L. Mason 1955-7-14 14634 Contra Costa 1/2 mi e of Antioch Bridge Comment
  UC635705  Samolus parviflorus H. L. Mason September 1930 5904 Monterey Elkhorn Slough between Watsonville and Castroville; Elkhorn Slough Comment
  UC1191144  Sanicula bipinnatifida Herbert L. Mason 1953-4-18 14511 Lake 4.5 mi n of Middletown (near Anderson's Springs) Comment
  UC566885  Sanicula crassicaulis H. L. Mason 1926-3-17 2743 Alameda Berkeley Hills, Strawberry Canyon Strawberry Canyon; Berkeley Hills, Strawberry Canyon Comment
  UC566827  Sanicula graveolens H. L. Mason 1926-5-31 3360 Calaveras 1.5 mi w of Calaveres Big Tree Grove (junction of old road and new) Comment
  UC1178998  Sanicula laciniata Herbert L. Mason 1938-5-7 11768 Santa Barbara Burton Mesa Comment
  SEINET3815688 Image available Sanicula tuberosa Herbert L. Mason 1939-7-8 12153 Nevada 3 miles west of Donner Summit 2073 Comment
  UC1178946  Sanicula tuberosa Herbert L. Mason 1939-7-8 12153 Nevada 3 mi w of Donner Summit 2072 Comment
  GH381136  Saxifraga californica H. L. Mason 1926-3-7 2702 Unknown Mt. Diablo Comment
  UC1081516  Saxifraga californica Herbert L. Mason 1936-3-14 10994 Calaveras s of Sheep Ranch (San Antonio Creek); San Antonio Creek Comment
  UC1081524  Saxifraga californica Herbert L. Mason 1936-3-20 11015 Tuolumne 3 mi above Tuolumne; Sierra Nevada Comment
  UC570945  Saxifraga californica Herbert L. Mason 1926-3-6 2688 Marin Mount Tamalpais Comment
  UC635130  Saxifraga integrifolia H. L. Mason 1931-3-7 5808 Sonoma 12 mi w of Santa Rosa (Vine Hill School); Vine Hill School Comment
  UC570932  Saxifraga nidifica var. nidifica Herbert L. Mason 1926-5-30 3306 El Dorado hills above Lake Tahoe; Emerald Bay, Lake Tahoe 1981 Comment
  UC1056438  Saxifraga odontoloma Herbert L. Mason 1937-7-30 Mono above Lake Mary Comment
  UC642736  Saxifraga odontoloma H. L. Mason 1936-7-31 11475 Mono Tioga Crest near Saddlebag Lake (Tioga Pass region); Sierra Nevada, , Tioga Crest 3200 Comment
  CAS-BOT-BC111372  Schoenoplectus acutus var. occidentalis Herbert L. Mason; Verne Grant 1946-8-14 13031 Butte Canal near big pond on Sacramento Outing Club, Butte Sink Comment
  CAS-BOT-BC111375  Schoenoplectus acutus var. occidentalis Herbert L. Mason; Verne Grant 1946-8-7 12993 Butte Big pond near river, Grey Lodge Game Refuge; Gridley Road north of Butte Sink. Comment
  UC1100773  Schoenoplectus acutus var. occidentalis Herbert L. Mason, Verne Grant 1947-6-26 13265 Solano Suisun Marsh Cordelia Slough, Suisun Marsh Comment
  UC632851  Schoenoplectus acutus var. occidentalis H. L. Mason 1938-8-1 12064 Tuolumne Rancheria Mountain Trail Yosemite National Park, Tiltill Valley (Tiltill Valley, Yosemite National Park) 1676 Comment
  UCD50073  Schoenoplectus acutus var. occidentalis Herbert L. Mason; Verne Grant 1946-8-7 12993 Butte Big pond near river, Grey Lodge Game Refuge; Gridley Road north of Butte Sink, Butte County. Comment
  POM312846  Schoenoplectus maritimus H. L. Mason 1945-8-16 12660 -a Solano Grizzly Island, near Suisun Bay Comment
  POM312850  Schoenoplectus mucronatus H. L. Mason 1946-9-27 13135 Butte 3 miles west of Biggs. Comment
  SEINET199876  Scirpus acutus H. L. Mason, V Grant 1947-7-11 13379 Modoc Along S. fork of Pit River downstream from Jess Valley by Forest Service camp site Comment
  YM-YOSE65594  Scirpus acutus H. L. Mason 1938-7-8 11883 Tuolumne SWAMP LAKE RESEARCH RESERVE. WEST END OF SWAMP (LAKE?) Comment
  UC1100679  Scirpus acutus var. occidentalis Herbert L. Mason, Verne Grant 1946-7-5 12906 Solano in water in Lake Chabot water reservoir just n Vallejo; Lake Chabot water reservoir, n of Vallejo Comment
  UC1100764  Scirpus acutus var. occidentalis Herbert L. Mason 1948-9-4 13648 Mono Rush Creek Mono Lake, Rush Creek Comment
  UC1100770  Scirpus acutus var. occidentalis Herbert L. Mason, Verne Grant 1947-7-9 13298 Lassen irrigation ditch 5 mi e Bieber; e of Bieber Comment
  UC1100771  Scirpus acutus var. occidentalis Herbert L. Mason, Verne Grant 1947-6-26 13271 Solano Suisun Marsh Cordelia Slough, Suisun Marsh Comment
  UC1100769  Scirpus acutus var. occidentalis Herbert L. Mason, Verne Grant 1947-7-11 13365 Modoc on Highway 395 5 mi s Alturas; on Highway 395 5 mi s of Alturas Comment
  UC1100876  Scirpus americanus Herbert L. Mason 1947-8-11 13499 Modoc on Highway 81 w margin Lower Lake (near boundary between Lassen and Modoc counties); w margin Lower Lake Comment
  UC1100796  Scirpus californicus Herbert L. Mason 1946-8-28 13092 San Mateo Pond Highway 5 about 3 mi s Daly City Road; s of Daly City Road, pond Comment
  UC1100924  Scirpus maritimus Herbert L. Mason, Verne Grant 1946-8-6 12964 Colusa four mi s Colusa (w side Sacramento River, pond on Colusa-Marysville Highway); w side Sacramento River, s of Colusa Comment
  UC965494  Scirpus microcarpus Herbert L. Mason 1952-8-16 14471 Nevada meadow opposite University of California Trout Laboratory (Sage Hen Creek); Sierra Nevada, Sage Hen Creek 1981 Comment
  UC1100883  Scirpus nevadensis Herbert L. Mason 1948-9-4 13664 Mono Rush Creek Mono Lake, Rush Creek Comment
  UC1100887  Scirpus nevadensis Herbert L. Mason, Verne Grant 1947-7-12 13436 Modoc n Likely (Corporation Ranch Headquarters); , n of Likely Comment
  UC1100806  Scirpus pungens Herbert L. Mason 1948-9-4 13663 Mono Rush Creek , Rush Creek (Mono Lake) Comment
  UC634870  Scutellaria californica H. L. Mason 1934-4-30 8106 Napa 5 mi s of Putah Creek (tributary of Putah Creek, Napa) Comment
  GH402093  Scutellaria siphocampyloides H. L. Mason 1940-5-5 12280 Unknown north slope of Twin Peaks, North Fork of Los Banos Creek, Inner South Coast Ranges 457 Comment
  CAS-BOT-BC417034  Sedella pumila H. L. Mason 1938-4-14 11703 Tulare Rocky Hill, east of Exeter. 304 Comment
  CAS-BOT-BC417037  Sedella pumila H. L. Mason 1938-4-14 11703 Tulare Rocky Hill, east of Exeter. 304 Comment
  CAS-BOT-BC416976  Sedella pumila Herbert L. Mason 1941-4-6 12409 Butte Three miles S of Chico near junction of road to Paradise 91 Comment
  POM264334  Sedella pumila H. L. Mason 1941-4-4 12409 Butte 3 miles S of Chico near junction of road to Paradise. 91 Comment
  UC912627  Sedum radiatum Herbert L. Mason 1925-12-30 2550 Mendocino Hopland to Cloverdale grade Comment
  CAS-BOT-BC59062  Sedum spathulifolium H. L. Mason 1921-7-1 s.n. San Mateo Pescadero Creek Comment
  UC1076450  Selaginella bigelovii Herbert L. Mason 1926-4-26 2941 Los Angeles upper rd. Pacoima Wash; San Gabriel Mts. Comment
  UC1076341  Selaginella wallacei Herbert L. Mason 1925-2-1 1224 Marin Mt. Tamalpais Comment
  UC1093682  Selaginella wallacei Herbert L. Mason 1926-1-1 2585 Lake Upper Lake to Elk Mt. Comment
  UC641693  Selaginella watsonii H. L. Mason 1936-7-24 11354 Tuolumne White Mt.; Sierra Nevada, Mt. Conness Range Comment
  UC566656  Senecio californicus H. L. Mason 1926-4-25 2908 Orange five mi s Laguna Comment
  UC566661  Senecio flaccidus var. monoensis H. L. Mason 1925-4-25 3068 San Bernardino Box S Springs Comment
  CAS-BOT-BC363599  Senecio fremontii var. occidentalis Herbert L. Mason 1940-7-30 12352 Alpine Sierra Nevada. Hills north of Carson Pass Comment
  UC566633  Senecio glomeratus H. L. Mason 1928-7-10 4884 Sonoma Jenner Comment
  UC714440  Senecio integerrimus var. exaltatus H. L. Mason 1936-7-23 11279 Tuolumne Mount Conness Sierra Nevada Comment
  UC1039616  Senna armata Herbert L. Mason 1935-4-30 8299 Kern 23 mi. w. Trona Comment
  UC672602  Sequoia sempervirens H. L. Mason 1928-8-26 4941 Mendocino slough of Pudding Creek Pudding Creek Comment
  CAS-BOT-BC364779  Sericocarpus oregonensis subsp. californicus Herbert L. Mason 1937-7-21 11556 Tuolumne Sierra Nevada, Yosemite National Park. Miguel Meadow, west of Hetch Hetchy 1584 Comment
  UC1076532  Sericocarpus oregonensis subsp. californicus Herbert L. Mason 1937-7-21 11556 Tuolumne west of, Miguel Meadow Hetch Hetchy; Yosemite National Park, Miguel Meadow 1584 Comment
  UCD92613  Setaria parviflora Herbet L. Mason; S. Galen Smith 1948-7-30 8262 Stanislaus about 7 miles south of Modesto, on Crow's Landing Road. 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-BC243648  Setaria pumila Herbert L. Mason 1945-9-18 12712 Sutter Pennington Road between Live Oak and Pennington Comment
  UC1100459  Setaria pumila Herbert L. Mason and Verne Grant 1946-9-27 13131 Butte Pennington-Gridley Rd. Butte Sink Comment
  UCD92862  Setaria viridis Herbert L. Mason; Malcolm A. Nobs 1948-9-3 491 Riverside 2 miles north of Indio. Comment
  UC1191168  Sidalcea glaucescens Herbert L. Mason 1926-5-31 3355 Calaveras 1.2 mi sw Big Trees (on old road) Comment
  GH420707  Sidalcea hartwegii H. L. Mason 1932-4-24 Unknown Near base of Pilot Hill about 11 mi. E. of Folsom Comment
  POM199432  Sidalcea hartwegii H. L. Mason 1932-4-24 s.n. Sacramento Near base of Pilot Hill about 11 miles E of Folsom Comment
  UC1083209  Sidalcea hartwegii Herbert L. Mason 1936-5-16 11124 A Mariposa Summit of road between Coulterville and Bagby Comment
  CAS-BOT-BC384566  Silene bridgesii Herbert L. Mason 1925-7-10 2154 Tuolumne Hog Range, Mather, Sierra Nevada 1432 Comment
  UC769971  Silene gallica Herbert L. Mason 1934-3-25 7945 Sacramento Keithly Ranch Sacramento Valley, Rio Linda, Keithly ranch Comment
  CAS-BOT-BC389539  Silene nuda Herbert L. Mason 1952-7-19 14452 Sierra Sierra Nevada. 1.5 miles east of Calpine at junction of Calpine with Sierraville-Beckwourth road. Sierra Valley 1524 Comment
  UC672673  Sisyrinchium bellum H. L. Mason 1923-7-23 642 Tuolumne Hog Ranch; Sierra Nevada Mountains, Yosemite National Park Comment
  UC672671  Sisyrinchium idahoense var. idahoense H. L. Mason 1923-7-30 674 Tuolumne the [Lytell] fork of the Tuolumne River (Tuolumne Meadows); Sierra Nevada Mountains, Yosemite National Park Comment
  UC592177  Sium suave H. L. Mason 1929-9-21 5444 San Joaquin Holt Comment
  UC570694  Solanum americanum H. L. Mason 1929-11-27 4150 Santa Barbara Carpenteria Comment
  UCD126821  Solanum americanum Herbert L. Mason; Verne Grant 1947-6-26 13261 Solano Cordelia Slough, Suisun Marsh. Comment
  UCSB44752  Solanum lanceolatum Mason, Renee 1980-4-14 Santa Barbara Gibralter Road, 1/4 mile before Rattlesnake Canyon parking area Comment
  UC570690  Solanum umbelliferum Herbert L. Mason 1926-5-28 3269 Placer 5 mi above Auburn Comment
  UC570683  Solanum umbelliferum H. L. Mason 1928-5-3 4485 Amador opposite of Clark Creek (s bank of Cosumnes River); Cosumnes River Comment
  UC570692  Solanum umbelliferum Herbert L. Mason 1924-6-19 1066 Plumas slide just west of Gold Lake Comment
  UCD127061  Solanum xanti Steve Mason; Pam Rector 1993-4-16 8 Orange Laguna Niguel, Sea View Park Trail. Approximately 150 yards from trailhead on left side. 182 Comment
  UC672221  Solidago elongata H. L. Mason 1924-10-19 1124 San Francisco Merced Lake , Merced Lake (San Francisco) Comment
  UC769973  Soliva sessilis Herbert L. Mason 1934-3-25 7957 Sacramento Keithly Ranch Sacramento Valley, Rio Linda, Keithly Ranch (Rio LInda, Sacramento Valley) Comment
  UC555566  Sorbus californica H. L. Mason 1923-8-9 739 Tuolumne w of Third Lake; Gaylor Lakes Comment
  UC555551  Sorbus californica H. L. Mason 1923-9-15 Tuolumne hill w of Tioga Pass Comment
  UC1100454  Sorghum halepense Herbert L. Mason 1945-9-10 12723 Colusa 1 mi. n. Colusa (below causeway over Butte Sink spillway, e. bank Sacramento R.); Sacramento R. Comment
  UCD92752  Sorghum halepense H. L. Mason 1945-9-19 12723 Colusa 1 mile N of Colusa. Below causeway over Butte Sink spillway, E bank of Sacramento River. Comment
  UC1099810  Sparganium angustifolium Herbert L. Mason 1945-9-7 12689 Mono pond below Tioga Lake Comment
  UCD94832  Sparganium emersum Herbert L. Mason 1929-8-21 5401 Mendocino Fort Bragg, Pudding Creek Slough. Comment
  UC1099923  Sparganium emersum var. emersum Herbert L. Mason 1929-8-24 5401 Mendocino Pudding Creek Slough; Fort Bragg Comment
  UC1099920  Sparganium emersum var. emersum Herbert L. Mason 1953-7-8 14560 Plumas 4 mi nw Loyalton Comment
  UC1099921  Sparganium emersum var. emersum Herbert L. Mason 1947-8-15 13562 Modoc 11 mi from Davis Creek (spring leading to w side of Goose Lake) Comment
  POM312967  Sparganium erectum subsp. stoloniferum H. L. Mason 1946-7-27 12943 Lake Margin of Clear Lake about one mile south of Lakeport. Comment
  UC1099805  Sparganium erectum subsp. stoloniferum Herbert L. Mason 1945-8-17 12662 Solano near Rio Vista (bank of Sacramento River); Sacramento River Comment
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Sep 25 2008
  UC1099811  Sparganium natans Herbert L. Mason 1937-7-22 11603 Tuolumne just s Miguel Meadows (Swamp Lakes, n of Hetch Hetchy Dam); Sierra Nevada, Yosemite National Park, Swamp Lakes; Marsh Plant Survey 1584 Comment
  UCSB44117  Spartium junceum Mason, Renee 1980-4-14 Santa Barbara Gibraltar Road, 1 mile after Rattlesnake Canyon parking area, on right side of road Comment
  SD49861  Sphaeralcea ambigua var. ambigua Herbert L. Mason 1952-4-9 14230 San Bernardino 10 miles south of Needles. Comment
  UC555285  Spiraea densiflora H. L. Mason 1929-10-4 5470 El Dorado Glen Alpine Comment
  UC1076534  Spiranthes stellata Herbert L. Mason and L. W. Reinecke 1937-7-22 11626 Tuolumne w Hetch Hetchy; Sierra Nevada, Yosemite National Park, Swamp Lake 1584 Comment
  UC673572  Spiranthes stellata Herbert L. Mason 1923-7-21 639 Tuolumne Poopenaut Valley Sierra Nevada, Yosemite National Park, vicinity of Hetch Het Comment
  UC673574  Spiranthes stellata H. L. Mason 1923-7-25 649 Tuolumne Mather Spring Sierra Nevada Mountains, Yosemite National Park, Hog Ranch Comment
  CAS-BOT-BC534890  Spirodela polyrhiza Herbert L. Mason 1953-7-8 14561 Plumas Four miles northwest of Loyalton Comment
  UC635137  Stachys ajugoides var. rigida H. L. Mason 1932-7-21 7103 Humboldt Big Lagoon Comment
  UCLA71370  Stachys bullata Herbert L. Mason 1927-4-24 3700 San Mateo mouth San Gregorio Creek Comment
  UC635697  Stachys chamissonis H. L. Mason 1928-10-21 5005 Mendocino near Fort Bragg; Pudding Creek Comment
  GH379858  Stanfordia californica H. L. Mason 1935-5-2 10001 Unknown One mile east of Lost Hills, northwest Kern County Comment
  CAS-BOT-BC202913  Staphylea bolanderi H. L. Mason 1931-5-9 5875 Shasta Pitt River Comment
  UC936170  Stellaria calycantha Herbert L. Mason 1936-7-28 11419 Mono Mount Dana Plateau Comment
  UC965631  Stellaria longipes var. longipes Herbert L. Mason 1952-7-16 14366 Nevada 1 mi w Univ. of Calif. Trout Laboratory (Sage Hen Creek); Sierra Nevada, Sage Hen Creek 1981 Comment
  UC965633  Stellaria longipes var. longipes Herbert L. Mason 1952-7-16 14367 Nevada 1 mi w Univ. of Calif. Trout Laboratory (Sage Hen Creek); Sierra Nevada, Sage Hen Creek 1981 Comment
  UC1076558  Stellaria longipes var. longipes Herbert L. Mason 1938-7-7 11863 Tuolumne nw of Hetch Hetchy; Sierra Nevada, Yosemite National Park 1584 Comment
  UC565503  Stephanomeria cichoriacea H. L. Mason 1929-10-12 5500 San Luis Obispo 9 mi e Morro Comment
  UC565522  Stephanomeria virgata subsp. pleurocarpa Herbert L. Mason 1926-7-27 2176 Tuolumne Mather Comment
  UC1292653  Streptanthus Herbert L. Mason 1947-7-8 13275 Unknown State Hwy 20; Clear Lake to Williams Rd, Lake-Colusa co. line Comment
  OBI14932  Streptanthus breweri Herbert L. Mason 1940-5-22 12308 a Lake 3 mi E of Middletown Comment
  UC971991  Streptanthus breweri var. breweri Herbert L. Mason 1952-6-19 14300 Colusa area between Fouts Springs and Red Bridge Public Camp; Mendocino National Forest Comment
  CAS-BOT-BC87111  Streptanthus glandulosus subsp. glandulosus H. L. Mason 1938-5-1 11747 Lake Bartlett Mountain. 4 miles from Lucerne. Comment
  UC1178879  Streptanthus glandulosus subsp. glandulosus Herbert L. Mason 1941-4-5 12408 Colusa on road between Maxwell and Stonyford just w summit of grade 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
  UC1093675  Streptanthus insignis Herbert L. Mason 1957-5-11 14734 San Benito canyon entrance 4-5 mi e Hernandez; Clear Creek Canyon Comment
  GH422241  Streptanthus polygaloides H. L. Mason 1936-05-15 - 1936-05-16 11118 Unknown Summit of road between Coulterville and Bagby 701 Comment
  GH422251  Streptanthus polygaloides H. L. Mason 1959-5-24 14899 Unknown in canyon of north fork of the Yuba River, exactly opposite Goodyears Bar (above north bank of river) 853 Comment
  RSA0036091  Streptanthus polygaloides Herbert L. Mason 1936-5-15 111118 Mariposa Summit of road between Coulterville and Bagby. 701 Comment
  UC673307  Streptanthus tortuosus H. L. Mason 1933-9-2 7275 Amador Silver Lake Sierra Nevada Mountains Comment
  CAS-BOT-BC242264  Stuckenia striata Herbert Louis Mason 1955-8-14 14648 Modoc S end of Goose Lake. Comment
  SEINET949758 Image available Stuckenia striata Herbert L. Mason, S. Galen Smith 1948-1 8327 Merced Crane Ranch, south of junction of Merced and San Joaquin Rivers. Comment
  CAS-BOT-BC376019  Stylocline gnaphaloides H. L. Mason 1933-4-22 7214 Monterey Pajaro Hills Comment
  UC1077076  Stylocline gnaphaloides Herbert L. Mason 1938-5-7 11783 Santa Barbara Burton Mesa Comment
  UC581147  Stylocline gnaphaloides H. L. Mason 1935-3-31 8255 Fresno near Kett Station (e of Fresno) Comment
  UC581171  Stylocline masonii H. L. Mason 1935-3-30 8252 San Luis Obispo Cholame Valley Comment
  CAS-BOT-BC423007  Stylomecon heterophylla H. L. Mason 1921-5-14 s.n. Alameda Haywards [Hayward] 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
  UC635479  Stylomecon heterophylla H. L. Mason 1930-10-25 5775 Monterey between Jolon and Santa Lucia Ranger Station (along the San Antonio River, in the foothills of the Santa Lucia Mountains); Santa Lucia Mountains, San Antonio River Comment
  GH384820  Styrax redivivus H. L. Mason 1923-6-16 456 Unknown La Combre Peak, Santa Barbara, by way of Rattlesnake Canyon and La Combre Trail Comment
  UC1076414  Symphoricarpos albus var. laevigatus Herbert L. Mason 1924-11-23 1158 Contra Costa Cashion Comment
  RSA55143  Symphoricarpos mollis S. C. Mason 1910-8-29 s.n. Santa Barbara San Marcoss Pass. Comment
  UC1076412  Symphoricarpos mollis Herbert L. Mason 1929-5-7 5264 Contra Costa Moraga Ridge Comment
  SEINET8061689  Symphoricarpos mollis S. C. Mason 1910-8-29 s.n. Santa Barbara San Marcos Pass. Comment
  UC1191852  Symphoricarpos rotundifolius var. rotundifolius Herbert L. Mason 1948-7-18 13619 Modoc Cedar Pass; Warner Mountains Comment
  UC1093913  Symphyotrichum chilense Herbert L. Mason 1932-8-26 7151 Mendocino 1.5 mi n Albion Comment
  UC1093937  Symphyotrichum chilense Herbert L. Mason 1932-8-26 7139 Mendocino Navarro River Comment
  UC1192080  Symphyotrichum frondosum Herbert L. Mason 1947-8-11 13487 Modoc Kelley Hot Springs, on Alturas-Conby highway Comment
  CAS-BOT-BC98052  Symphyotrichum lentum Herbert L. Mason 1945-9-18 12708 Sutter on overflow lands of Sutter [By-pass] Bypass near bridge on Yuba City - Knight's Landing Highway Comment
  CAS-BOT-BC98506  Symphyotrichum spathulatum Herbert L. Mason 1952-8-16 14489 Nevada Meadow opposite University of California Trout Laboratory - Sage Hen Creek - Sierra Nevada 1981 Comment
  UC1192088  Symphyotrichum spathulatum Herbert L. Mason 1945-9-18 12708 Sutter Sutter By-pass near bridge on Yuba City-Knight's Landing Highway Comment
  UC965578  Symphyotrichum spathulatum Herbert L. Mason 1952-8-16 14489 Nevada meadow opposite of University of California Trout Laboratory; Sierra Nevada, Sage Hen Creek 1981 Comment
  CAS-BOT-BC15171  Symphyotrichum spathulatum var. spathulatum Herbert Louis Mason 1947-8-9 13480 Modoc East side of Fairchild Swamp, N of Alturas. Comment
  UC1192081  Symphyotrichum subulatum Herbert L. Mason 1945-9-18 12703 Sutter Sutter By-pass near bridge on Yuba City-Knight's Landing Highway Comment
  UC566896  Tauschia hartwegii H. L. Mason 1926-5-28 3266 Placer hills near Auburn (Auburn) Comment
  UC501344  Taxus brevifolia Herbert L. Mason 1929-10-4 5479 El Dorado 15 mi above Placerville Comment
  UC1081555  Tetradymia canescens Herbert L. Mason 1936-8-1 11480 Mono Leevining Canyon Sierra Nevada, Yosemite National Park Comment
  UC1081544  Thalictrum fendleri Herbert L. Mason 1936-7-12 11221 Mariposa Peregoy Meadow Sierra Nevada, Yosemite National Park, Glacier Point 2255 Comment
  CAS-BOT-BC180989  Thamnosma montana H. L. Mason 1935-3-28 8178 San Bernardino Three miles south of Barstow, Mojave Desert Comment
  GH347985  Thamnosma montana H. L. Mason 1935-3-28 8173 Unknown Three miles south of Barstow, Mojave Desert Comment
  UC581150  Thamnosma montana H. L. Mason 1935-3-28 8173 San Bernardino 3 mi s of Barstow (Mojave Desert); Mojave Desert Comment
  UC555347  Thermopsis californica var. californica Herbert L. Mason 1928-4-13 4318 Marin hills n San Rafael Comment
  UC1056454  Thysanocarpus curvipes Herbert L. Mason 1936-3-20 11011 Tuolumne three mi above Tuolumne Comment
  UC570909  Tiarella trifoliata var. unifoliata H. L. Mason June 1930 5667 Sonoma mouth of Gualala River Comment
  UC570916  Tiarella trifoliata var. unifoliata Herbert L. Mason 1925-10-25 2243 a Santa Cruz edge Woodwardia Creek (Big Basin); , edge of Woodwardia Creek Comment
  GH381227  Tiarella unifoliata H. L. Mason 1928-7-11 4888 Unknown Canyon 2 miles north of Fort Ross Comment
  POM312566  Tiquilia nuttallii H. L. Mason 1948-9-5 13680 Mono Mono craters. Comment
  UC1101052  Tofieldia occidentalis subsp. occidentalis Herbert L. Mason 1946-7-4 12887 Sonoma Pitkin Marsh, between Santa Rosa and Forestville Comment
  UC965629  Tofieldia occidentalis subsp. occidentalis Herbert L. Mason 1952-7-16 14341 Sierra 1 mi W of University of California Trout Laboratory; Sierra Nevada Comment
  UC672568  Tonella tenella H. L. Mason 1926-3-21 2769 Lake Middletown to Mt. St. Helena (via Toll House Canyon); Toll House Canyon Comment
  CAS-BOT-BC519588  Triantha occidentalis subsp. occidentalis Herbert L. Mason 1950-7-15 14052 Trinity Summit of grade, Scott Mountain Comment
  UC566728  Trichoptilium incisum H. L. Mason 1928-3-10 4210 Riverside Hidden Springs Canyon Coachella Mts. Comment
  UC570716  Trichostema lanceolatum Herbert L. Mason 1926-10-16 3643 Los Angeles Pasadena Comment
  GH402483  Trichostema oblongum H. L. Mason 1925-7-27 2178 Unknown Hog Ranch, Mather Comment
  UC566679  Trichostema oblongum H. L. Mason 1925-7-27 2178 Tuolumne Hog Ranch, Mather Comment
  RSA116718  Trientalis latifolia H. L. Mason 1917-4-21 s.n. San Mateo Permental Creek Comment
  UC555620  Trifolium albopurpureum H. L. Mason 1929-4-7 5181 Stanislaus ca 10 mi above Oakdale; Sierra foothills Comment
  UC555617  Trifolium albopurpureum var. albopurpureum H. L. Mason 1929-5-7 5261 Contra Costa Moraga Ridge Comment
  UC555603  Trifolium barbigerum H. L. Mason 1928-4-28 4392 Marin Tiburon Peninsula Comment
  UC555601  Trifolium bifidum var. decipiens H. L. Mason 1929-4-25 5205 Contra Costa Marsh Creek Rd Comment
  UC555369  Trifolium ciliolatum H. L. Mason 1929-4-7 5184 Stanislaus ca 10 mi above Oakdale; Sierra foothills Comment
  UC555352  Trifolium depauperatum var. amplectens H. L. Mason 1928-5-4 4501 El Dorado Shingle Springs Comment
  UC555371  Trifolium depauperatum var. amplectens H. L. Mason 1929-4-7 5173 Stanislaus 6 mi w Oakdale Comment
  UC555373  Trifolium depauperatum var. amplectens H. L. Mason 1929-4-7 5169 Stanislaus 6 mi w Oakdale Comment
  UC555402  Trifolium depauperatum var. depauperatum H. L. Mason 1928-4-13 4336 Napa near spring (Reili School) Comment
  UC555354  Trifolium depauperatum var. truncatum H. L. Mason 1929-4-25 5208 Contra Costa Marsh Creek Rd Comment
  UC1191487  Trifolium eriocephalum var. eriocephalum Herbert L. Mason 1948-7-17 13601 Siskiyou Eastern Grass Lake Comment
  UC555452  Trifolium fucatum H. L. Mason 1928-4-25 4371 San Francisco Hunter's Point Comment
  UC555588  Trifolium kingii var. productum H. L. Mason 1924-6-19 1060 Plumas betw Graeagle and Gold Lake; rd Comment
  UC1111534  Trifolium longipes var. hansenii Herbert L. Mason 1936-8-6 11503 Mariposa Glacier Point Rd Sierra Nevada, Yosemite National Park, Paragoy Meadow 2255 Comment
  UC555610  Trifolium microdon H. L. Mason 1929-4-7 5175 Stanislaus ca 10 mi above Oakdale; Sierra Nevada foothills Comment
  UC1056452  Trifolium monanthum subsp. parvum Herbert Mason 1936-8-6 11502 Mariposa Peregoy Meadow, Glacier Point Sierra Nevada, Yosemite National Park 2255 Comment
  UC555614  Trifolium oliganthum H. L. Mason 1928-5-6 4560 Alameda Cedar Mtn Comment
  UC1179051  Trifolium variegatum Herbert L. Mason 1939-7-11 12118 Tuolumne 1/2 mi below Swamp Lake (w of Hetch Hetchy); Sierra Nevada, Yosemite National Park 1554 Comment
  UC555368  Trifolium variegatum Herbert L. Mason 1927-7-31 4011 Santa Cruz Zayante Creek Santa Cruz Mtns Comment
  UC555572  Trifolium willdenovii H. L. Mason 1928-5-6 4568 Alameda Cedar Mtn Comment
  UC555574  Trifolium willdenovii H. L. Mason 1929-4-7 5185 Stanislaus ca 10 mi above Oakdale; Sierra foothills Comment
  UC555570  Trifolium wormskioldii H. L. Mason 1925-7-4 2145 Tuolumne Mather Sierra Nevada, Yosemite National Park Comment
  CAS-BOT-BC245033  Triglochin concinna var. debilis Herbert Louis Mason; Verne Grant 1947-7-12 13438 Modoc Corporation Ranch Headquarters, N of Likely. Comment
  CAS-BOT-BC451790  Triglochin maritima Herbert L. Mason 1946-6-28 12879 Alameda Oakland Airport, mouth of San Leandro Creek Comment
  UC1099947  Triglochin maritima Herbert L. Mason, Malcolm A. Nobs, and S. Galen Smith 1949-5-29 767 Modoc e Kelly Hot Springs Comment
  UC1039622  Trillium angustipetalum Herbert L. Mason 1940-7-7 12327 Tuolumne s. of Miguel Meadow and Swamp Lake (Poison Meadow); Poison Meadow Comment
  UC672068  Trillium chloropetalum Herbert L. Mason 1926-6-6 3377 Santa Cruz Felton, San Lorenzo R. Comment
  UC672071  Trillium chloropetalum Herbert L. Mason 1926-3-21 2779 Lake Middletown to Mt. St. Helena via Toll House Canyon Comment
  UC635649  Triodanis biflora H. L. Mason 1932-5-4 7061 Alameda Laundry Farm Oakland Hills Comment
  UC1178990  Triphysaria micrantha Herbert L. Mason 1938-4-14 11708 Tulare 4 mi e Exeter Comment
  UC1199899  Triteleia hyacinthina Herbert L. Mason 1958-4-3 14899 a Tehama on Paynes Creek Road ca 4 mi e Red Bluff; Paynes Creek Comment
  CAS-BOT-BC522046  Triteleia ixioides subsp. anilina H. L. Mason 1923-7-16 611 Tuolumne Hog Ranch, Yosembite National Park, Sierra Nevada Mountains Comment
  CAS-BOT-BC67355  Tropidocarpum capparideum H. L. Mason 1932-3-19 6818 Alameda Road from Mountain House to Midway, west of Tracy. Comment
  JEPS54271  Tropidocarpum capparideum Herbert L. Mason 1920-3-27 5115 Alameda fields behind Mountain House (Altamont Pass); Altamont Pass Comment
  CAS-BOT-BC67397  Tropidocarpum gracile H. L. Mason 1921-5-14 s.n. Alameda Haywards. Comment
  CAS-BOT-BC67405  Tropidocarpum gracile H. L. Mason 1932-3-20 6842 Contra Costa Antioch. Comment
  UC673304  Tropidocarpum gracile H. L. Mason 1932-3-19 6817 Alameda w Tracy (road from Mountain House to Midway) Comment
  UC673338  Tropidocarpum gracile H. L. Mason 1929-3-31 5148 Contra Costa in pastures Briones Valley Comment
  UC1191109  Tsuga heterophylla Herbert L. Mason 1928-8-25 4927 Mendocino mesa 1 mi e of mouth of Noyo River; Noyo Comment
  UC1241767  Typha Herbert L. Mason 1948-5-31 13573 San Joaquin three mi n Ripon; n of Ripon Comment
  UC240192  Typha latifolia Herbert L. Mason 1958-8-6 Tuolumne w Hetch Hetchy (Swamp Lake, Yosemite National Park); Sierra Nevada, Yosemite National Park, w of Hetch Hetchy 1584 Comment
  UC241806  Typha latifolia Herbert L. Mason 1949-7-7 14032 San Mateo mouth of Pescadero Creek Comment
  UC1241805  Typha latifolia Herbert L. Mason 1947-7-8 13302 Lassen Irrigation ditch 5 mi e of Bieber (Highway 299, e of Hatchet Creek Summit); Highway 299 1219 Comment
  UC632874  Uropappus lindleyi H. L. Mason 1936-3-21 11032 Mariposa four mi n Coulterville Comment
  UC635676  Utricularia macrorhiza Herbert L. Mason 1929-9-9 5422 San Joaquin Holt, lower San Joaquin R. Comment
  YM-YOSE66550  Utricularia vulgaris Harry L. Mason 1938-7-10 11916 Tuolumne SWAMP LAKE RESEARCH RESERVE, SOUTH ISLAND OF LAKE Comment
  JEPS58742  Vaccinium ovatum Herbert L. Mason 1923-6-15 398 Santa Barbara Summit of Harris Grade Comment
  UC634719  Vaccinium ovatum H. L. Mason 1927-9-25 4101 Santa Barbara Pine Ridge, slopes toward West Ranch Santa Cruz Island Comment
  UC634725  Vaccinium ovatum H. L. Mason 1928-2-18 4165 Marin Inverness Ridge Point Reyes Comment
  UC571036  Vaccinium uliginosum subsp. occidentale Herbert L. Mason 1923-7-31 677 Tuolumne Lyell Fork of the Tuolumne River Yosemite National Park, Tuolumne River Comment
  UC1081536  Valeriana californica Herbert L. Mason 1936-7-23 11281 Tuolumne Alpine slopes se of summit of Mt. Conness; Sierra Nevada, Yosemite National Park 3505 Comment
  UC912421  Valeriana californica Herbert L. Mason 1926-5-30 3323 Alpine along road from Tahoe to Kit Carson Pass 1889 Comment
  JEPS5114  Valerianella locusta H. L. Mason 1932-4-28 El Dorado betw Latrobe and Shingle Sprs.; betw. Latrobe and Shingle Sprs. Comment
  UC545812  Valerianella locusta H. L. Mason 1932-4-25 7005 Amador Ione to Latrobe Road bank of Cosumnes River Comment
  UC1191451  Velezia rigida Herbert L. Mason 1948-5-31 13571 Stanislaus near Knight's Ferry; Stanislaus River, near Knight's Ferry Comment
  CAS-BOT-BC391324  Velezia rigida Herbert L. Mason 1948-5-31 13571 Stanislaus Stanislaus River, near Knight's Ferry Comment
  UC635116  Verbena lasiostachys Herbert L. Mason 1926-6-6 3365 a Santa Cruz Felton Comment
  UC1192057  Verbena litoralis Herbert L. Mason, Verne Grant 1946-8-14 13039 Sutter between Live Oak and Pennington Comment
  UCD124894  Veronica Herbert L. Mason; S. Galen Smith 1948-8-9 8274 Santa Clara small reservoir, Pacheco Pass, just west of summit. Comment
  UC1178867  Veronica scutellata Herbert L. Mason 1939-7-11 12124 Tuolumne 1/2 mi below Swamp Lake (w of Hetch Hetchy, Yosemite National Park); Sierra Nevada, Yosemite National Park 1584 Comment
  UC672513  Veronica serpyllifolia subsp. humifusa H. L. Mason 1925-7-30 2194 Tuolumne ne of Mather (Smith Peak trail); Smith Peak trail Comment
  UC1191598  Vicia americana var. americana Herbert L. Mason and Verne Grant 1947-7-21 8121 Modoc n of Alturas (North Fork of Pit River, by bridge on Highway 395); North Fork of Pit River Comment
  SFV16520  Vicia benghalensis S. Mason, P. Rector 1993-4-16 9 Orange Santa Ana Mountains CA State Highway 74 at Lower San Juan Campground. Adjacent to campground sign on southeast side of road. 396 Comment
  UC1076057  Viola adunca Herbert L. Mason 1947-5-17 14769 Unknown Scott Mountain divide Comment
  UC581489  Viola adunca H. L. Mason 1928-2-18 4163 Marin Inverness Ridge; Point Reyes Comment
  UC581488  Viola beckwithii H. L. Mason 1933-5-28 7239 Placer Lower Truckee River Comment
  UC581521  Viola douglasii H. L. Mason 1926-3-21 2772 Lake between Middletown and Mount St. Helena Comment
  UC1076058  Viola glabella Herbert L. Mason 1947-5-17 14768 Unknown Scott Mountain divide Comment
  UC1076026  Viola hallii Herbert L. Mason 1947-5-17 14781 Unknown Summit of Scott Mountain grade Comment
  CAS-BOT-BC537088  Viola lobata H. L. Mason 1926-5-29 3290 Placer 2 miles W of Emigrant Gap Comment
  UC581539  Viola lobata subsp. lobata Herbert L. Mason 1926-5-31 3351 Calaveras Calaveras Big Trees Comment
  UC581502  Viola macloskeyi H. L. Mason 1923-7-25 326 Mariposa Creek 1 1/2 mi below Porcupine Flat (on Tioga Pass Road); Tioga Pass Road 2133 Comment
Read comments
Sep 27 2009
  UC581538  Viola ocellata Herbert L. Mason 1927-4-23 3696 San Mateo Pescadero Creek near Bloomquists Mill; Pescadero Creek Comment
  UC1101417  Viola palustris Herbert L. Mason 1946-5-19 12778 Mendocino n of Fort Bragg (Cleone Lake); Cleone Lake Comment
  UC1093975  Viola purpurea subsp. quercetorum Herbert L. Mason 1938-5-8 11801 Santa Barbara vicinity of the summit of Figueroa Mountain Comment
  UC1076050  Viola sheltonii Herbert L. Mason 1947-5-18 14784 Mendocino lower slopes of Anthony Peak (w of Government Camp) Comment
  UC634820  Vitis californica Herbert L. Mason 1925-6-29 2138 Tuolumne Lake Eleanor 1219 Comment
  UC912577  Vulpia bromoides Herbert L. Mason 1931-4-24 5857 Alameda Berkeley Hills; above Claremont Hotel Comment
  UCD94569  Vulpia microstachys var. pauciflora Herbert L. Mason 1938-4-14 11715 Tulare 4 miles east of Exeter. Comment
  UC1100360  Vulpia myuros var. hirsuta Herbert L. Mason and Malcolm A. Nobs 1949-4-27 722 Solano Suisun State Game Refuge Comment
  UC1056302  Vulpia octoflora var. hirtella Herbert L. Mason 1935-4-30 6276 Kern Onyx Comment
  SD48055  Wolffia borealis H. L. Mason 1955-6-8 14629 Shasta In a marsh at the bridge, west edge of Fall River Mill. Comment
  UC702407  Wolffia columbiana Herbert L. Mason 1946-6-9 12864 San Luis Obispo Dune Lakes Comment
  UC1101235  Wolffiella lingulata Herbert L. Mason and S. Galen Smith 1948-7-28 8227 Merced 2 mi n Los Banos; San Joaquin Valley, Los Banos Wildlife Refuge 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
  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
  POM256992  Wyethia elata H. L. Mason 1938-7-16 11952 Madera 4 miles south of Miami Ranger Station 1220 Comment
  UC912510  Wyethia mollis Herbert L. Mason 1923-8-7 719 Tuolumne s-facing slope Dana Fork Comment
  UC566872  Yabea microcarpa H. L. Mason June 1930 5656 Sonoma Mouth of Gualala River Comment
  UC1099978  Zannichellia palustris Herbert L. Mason and Verne Grant 1947-7-12 13427 Modoc n. Likely (s. loop of w. side rd.) Comment
  UC1109005  Zannichellia palustris H. L. Mason October 1929 Contra Costa Nortonville Comment
  CAS-BOT-BC454204  Zannichellia palustris Herbert L. Mason 1929-2-10 s.n. Contra Costa Nortonville Comment
  POM312979  Zannichellia palustris H. L. Mason, Verne Grant 1947-7-8 13281 Lake Bear Creek near Jct of Williams Hwy and Upper Lake Hwy. Lake County Comment
  UC1099977  Zannichellia palustris Herbert L. Mason 1947-8-8 13471 Modoc n.w. Alturas (s.w. edge of Big Sage Reservoir); Big Sage Reservoir Comment
  UC673368  Zigadenus venenosus var. venenosus H. L. Mason 1928-5-6 4554 Alameda Cedar Mountain Mount Hamilton Range Comment



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