Search Results — 2000 specimen records retrieved (1542 records with coordinates)
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(For large data reqests, please contact Jason Alexander, jason_alexander@berkeley.edu.)

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

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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  UC912298  Abronia Herbert L. Mason 1924-11-16 1151 Marin Stinson Beach, Willow camp Comment
  UC912528  Abronia Herbert L. Mason 1924-11-16 1152 Marin Stinson beach, Willow Camp Comment
  UC555289  Acaena pinnatifida var. californica H. L. Mason 1925-3-1 1266 San Francisco Bernal Heights Comment
  CAS-BOT-BC219647  Acanthomintha lanceolata Herbert L. Mason 1940-5-5 12284 San Benito Panoche Pass ca. 6 miles southeast of Pacines [Paicines] and 2.4 miles east of Emmet [Emmett] School, San Carlos Range 609 Comment
  UC570747  Acanthomintha lanceolata H. L. Mason 1928-5-6 4556 Alameda Cedar Mountain; Mount Hamilton Range, Cedar Mountain 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
  CAS-BOT-BC30448  Achillea millefolium Herbert L. Mason 1945-8-16 12659 Siskiyou Grizzly Island, near Suisun Bay Comment
  POM312500  Achillea millefolium var. californica H. L. Mason 1945-8-16 12659 Solano Grizzly Island, near Suisun Bay Comment
  UC635417  Actaea rubra H. L. Mason 1927-7-31 4006 Santa Cruz Santa Cruz Mts., Mt. Herman 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
  UC555433  Adenostoma fasciculatum H. L. Mason 1927-9-25 4107 Santa Barbara hills about Pelican Bay; Santa Cruz Isl. Comment
  UC1093983  Adiantum aleuticum Herbert L. Mason 1926-2-22 2663 Marin Inverness Comment
  UC1077119  Adiantum jordanii Herbert L. Mason 1925-3-7 1278 Alameda 0.5 mi sw of Sunol (bluff above stream junction) Comment
  UC912693  Adiantum jordanii Herbert L. Mason 1936-3-14 10980 Calaveras 4 mi e Mokelumne Hill Comment
  CAS-BOT-BC202720  Aesculus californica Herbert L. Mason 1925-6-27 2129 Tuolumne Tuolumne Canyon, near Mather 1371 Comment
  UC635202  Aesculus californica Herbert L. Mason 1925-6-27 2129 Tuolumne near Mather (Tuolumne Canyon); Tuolumne Canyon Comment
  UC1077101  Ageratina occidentalis Herbert L. Mason 1938-7-25 12008 Tuolumne s base Mahan Peak; Yosemite National Park, Jack Main Canyon, Deep Lake 2438 Comment
  UC571021  Ageratina occidentalis H. L. Mason 1928-10-4 5464 El Dorado 14 mi from; w side of Lake Tahoe above Emerald Bay; Tahoe City Comment
  CAS-BOT-BC295552  Agnorhiza bolanderi H. L. Mason 1936-3-21 11029 Mariposa Four miles north of Coulterville Comment
  UC632822  Agnorhiza bolanderi H. L. Mason 1936-3-21 11029 Mariposa 4 mi n Coulterville Comment
  CAS-BOT-BC29604  Agoseris grandiflora var. grandiflora Herbert L. Mason 1924-5-14 s.n. Alameda Haywards Comment
  UC635176  Agoseris heterophylla var. cryptopleura H. L. Mason 1928-5-4 4503 El Dorado 4 mi n of Shingle Springs; Green Valley Comment
  UC565497  Agoseris heterophylla var. heterophylla Herbert L. Mason 1925-7-10 2155 Tuolumne Hog Ranch Comment
  CAS-BOT-BC13135  Agoseris hirsuta Herbert L. Mason 1917-4-28 s.n. Marin Mill Valley Comment
  UC565509  Agoseris hirsuta H. L. Mason 1929-3-2 5034 Monterey 20 mi s, along Big Sur Road Carmel; Big Sur Road Comment
  SACT000120  Agrostis alba Herbert Mason 1948-9-4 Mono Rsuh Creek. Mono Lake. Comment
  UC1110539  Agrostis exarata Herbert L. Mason 1939-8-3 12206 Placer 7 mi nw Tahoe City (Squaw Valley); Squaw Valley 1889 Comment
  UC1102969  Agrostis scabra Herbert L. Mason 1958-8-9 14892 Tuolumne w of Hetch Hetchy Dam (Swamp Lake area); Sierra Nevada, Yosemite National Park, Swamp Lake 1584 Comment
  UC1102974  Agrostis scabra Herbert L. Mason 1958-8-9 14867 Tuolumne w of Hetch Hetchy Dam (Swamp Lake area); Sierra Nevada, Yosemite National Park, Swamp Lake 1584 Comment
  UC1111015  Agrostis thurberiana Herbert L. Mason 1938-7-10 11908 Tuolumne w of Hetch Hetchy Dam (South Island); Sierra Nevada, Yosemite National Park, Swamp Lake, South Isl 1584 Comment
  SEINET3917556  Aira caryophyllea Herbert L. Mason 1932-5-4 s.n. Alameda Laundry Farm. Oakland.; 0 Comment
  RSA114061  Aliciella H. L. Mason 1952-4-11 14249 San Bernardino Black Lava Bed just east of Dagget. Comment
  SD46107  Aliciella leptomeria Herbert L. Mason 1952-4-11 14249 San Bernardino Black Lava Bed just east of Dagget. Comment
  POM264404  Aliciella monoensis H. L. Mason 1941-7-13 12485 Mono North of Mono Lake along road to Bodie. Comment
  UC985651  Alisma plantago-aquatica Herbert L. Mason 1947-8-12 13508 Modoc Alturas, junction of North and South Forks of Pit River Pit River Comment
  UC985664  Alisma plantago-aquatica Herbert L. Mason and Lawrence W. Reinecke 1937-7-22 11610 Tuolumne w Hetch-Hetchy; Yosemite National Park, Swamp Lake Comment
  POM313034  Alisma triviale H. L. Mason, Verne Grant 1946-9-5 13119 Colusa Road to Lake Co, 1.6 miles W of Williams. Comment
  UC1275785  Allium bisceptrum var. bisceptrum Herbert L. Mason 1963-6-13 15208 Mono Danburg Ranch Mono Lake, Danburg Ranch Comment
  UC635260  Allium campanulatum H. L. Mason 1926-5-30 3312 El Dorado hillslope above falls, back of Emerald Bay Lake Tahoe, Emerald Bay Comment
  UC635262  Allium campanulatum H. L. Mason 1926-5-29 3296 Nevada 3 mi w Cisco 1767 Comment
  UC635257  Allium campanulatum H. L. Mason 1924-5-29 1030 Tuolumne along trail between Mather and Tuolumne River Comment
  JROH4548  Allium falcifolium H. L. Mason 1921-5-13 s.n. San Mateo Jasper Ridge Biological Preserve, Stanford University Comment
  UC635244  Allium hyalinum H. L. Mason 1928-5-3 4486 El Dorado near bridge of Cosumnes River (at mouth of Clark Creek); Cosumnes River, Clark Creek Comment
  UC1076331  Allium lacunosum Herbert L. Mason 1926-4-26 3009 Los Angeles Little Rock Comment
  UC635210  Allium lacunosum H. L. Mason 1928-4-28 4391 Marin Tiburon Peninsula Comment
  UC1178893  Allium lacunosum var. lacunosum Herbert L. Mason 1940-5-20 12291 Marin ourcrop back of Tiburon Comment
  UC635249  Allium serra H. L. Mason 1929-3-29 5135 Contra Costa Marsh Creek Road 2 mi e Claton; Marsh Creek Road Comment
  UC1178933  Allophyllum divaricatum Herbert L. Mason 1953-6-8 14520 Lake Butts Canyon, Black Oak Villa Comment
  UC907901  Allophyllum divaricatum Herbert L. Mason 1927-6-11 3742 Los Angeles Mt. Wilson San Gabriel Mts., Mt. Wilson Comment
  UC908934  Allophyllum divaricatum Herbert L. Mason 1926-5-31 3361 Calaveras 1 1/2 mi. w. Calaveras Grove Comment
  UC1186143  Allophyllum integrifolium Herbert L. Mason 1938-7-7 11867 Tuolumne w. Hetch Hetchy (Breccia Ridge s.e. of Swamp Lake); Sierra Nevada, Yosemite Nat'l Park, Breccia Ridge 1981 Comment
  SBBG64464  Allophyllum violaceum H. L. Mason 1941-7-16 12487 El Dorado Cold Crk, S of Lake Tahoe 2286 Comment
  UC1076427  Alnus incana subsp. tenuifolia H. L. Mason 1929-10-4 5463 Placer 4 mi s Truckee (on Truckee-Tahoe Rd, along river); Truckee River Comment
  UC1076356  Alnus rhombifolia H. L. Mason 1930-10-25 5758 Monterey Headwaters of the Arroyo Seco Santa Lucia Mts. Comment
  UC1076421  Alnus rhombifolia Herbert L. Mason 1925-7-30 2187 Tuolumne Smith Peak trail from Mather 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
  UC1100228  Alopecurus aequalis Herbert L. Mason 1947-8-13 13520 Modoc n. of Canby (n.e. side of F reservoir) 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
  UC1191390  Amaranthus californicus Herbert L. Mason 1947-8-8 13461 Modoc Southwest margin of Big Sage Reservoir, northwest of Alturas. Comment
  UC1191392  Amaranthus californicus Herbert L. Mason and Verne Grant 1946-8-6 12968 Colusa 2.7 mi n Colusa (between Sacramento River and Butte Creek); Butte Sink Comment
  UC1191393  Amaranthus californicus Herbert L. Mason 1945-8-24 12676 Lake e shore of Lower Lake Lower Lake Comment
  UCD97543  Amaranthus powellii Herbert L. Mason; Verne Grant 1947-7-10 13343 Modoc Dorris Reservoir, 2 miles east of Alturas. Comment
  UC912213  Ambrosia acanthicarpa Herbert L. Mason 1928-10-2 4973 Monterey 1 mi below, (at Salinas River) Salinas; Salinas River Comment
  UC1192148  Ambrosia psilostachya Herbert L. Mason 1945-8-17 12668 Solano 1.5 mi n of Rio Vista Comment
  UCD128879  Ambrosia salsola Steve Mason 1993-5-2 33 Los Angeles Mojave Desert, just N of Saddleback Butte State Park on E. 190th St. (N5), 0.1 mi. N of Ave. J., 50-100' off East side of road. 853 Comment
  UC912204  Ambrosia salsola var. salsola Herbert L. Mason 1928-3-10 4220 Riverside Hidden Springs Canyon Coachella Mountains Comment
  UC1101419  Ammannia coccinea Herbert L. Mason and Verne Grant 1946-9-27 13141 -A Butte 3 mi. w. Biggs Comment
  UC1191561  Ammannia coccinea Herbert L. Mason 1945-9-19 12716 Colusa 1 mi. above Colusa (below causeway over Butte Sink spillway, e. bank Sacramento R.); Butte Sink, Sacramento R. Comment
  UC1191563  Ammannia coccinea Herbert L. Mason 1945-9-19 12739 Butte n.w. Pennington (Gray Lodge Game Refuge); Gray Lodge Game Refuge Comment
  UCD102897  Ammannia robusta Herbert L. Mason; S. Galen Smith 1948-8-18 8355 Kings West of Stratford. Comment
  UC573137  Amsinckia lycopsoides H. L. Mason 1932-3-19 6816 San Joaquin w of Tracy (road from Mountain House to Midway) Comment
  UC573056  Amsinckia vernicosa var. vernicosa H. L. Mason 1930-4-20 5574 Kern hills between Mohave and Lancaster; Mohave Desert Comment
  CAS-BOT-BC45277  Ancistrocarphus filagineus H. L. Mason 1934-4-28 8093 Sonoma Jensen's Ranch, Dohrmann Creek Comment
  CAS-BOT-BC64164  Ancistrocarphus filagineus H. L. Mason 1933-4-30 7227 Lake Near Aetna Springs Comment
  UC1060647  Ancistrocarphus filagineus Herbert L. Mason 1957-5-11 14697 San Benito 2-3 mi e Hernandez Comment
  UC581123  Ancistrocarphus filagineus H. L. Mason 1934-4-28 8093 Sonoma Jenson's Ranch; Dohrmann Creek Comment
  UC673627  Ancistrocarphus filagineus H. L. Mason 1932-4-19 7012 El Dorado Pilot Hill Comment
  GH424256  Androsace elongata subsp. acuta H. L. Mason 1932-3-19 6820 Unknown two miles east of Midway Comment
  UC1111009  Androsace elongata subsp. acuta Herbert L. Mason 1928-3-4 4166 Contra Costa Shell Ridge Comment
  UC635715  Androsace elongata subsp. acuta H. L. Mason 1932-3-31 6855 Kern Tehachapi Pass Comment
  UC635716  Androsace elongata subsp. acuta H. L. Mason 1932-3-19 6820 San Joaquin two mi e Midway Comment
  CAS-BOT-BC391766  Anemone deltoidea H. L. Mason 1929-5-9 5280 Mendocino Bull Creek Flat Comment
  UC1039607  Anemone tuberosa Herbert L. Mason 1940-3-22 12236 Inyo Death Valley Nat'l Monument, Grape Vine Mts., Titus Canyon Comment
  CAS-BOT-BC63958  Antennaria argentea Herbert L. Mason 1936-7-12 11240 Mariposa Peregoy Meadow, Glacier Point road 2255 Comment
  UC1076045  Antennaria dimorpha Herbert L. Mason 1947-5-17 14777 Trinity summit of, (Trinity-Siskiyou County line) Scott Mountain Grade Comment
  CAS-BOT-BC77253  Antennaria microphylla H. L. Mason 1939-7-8 12162 El Dorado Northeast end of Fallen Leaf Lake 1950 Comment
  SEINET186009 Image available Antennaria rosea H. L. Mason 1939-7-8 12162 El Dorado NE end of Fallen Leaf Lake 1951 Comment
  SEINET2030007 Image available Antennaria rosea H. L. Mason 1939-7-8 12162 El Dorado Northeast end of Fallen Leaf Lake 1951 Comment
  UC912548  Antennaria rosea Herbert L. Mason 1933-9-2 7266 Amador Silver Lake Sierra Nevada Mountains, Silver Lake Comment
  UCD123430  Antirrhinum cornutum Herbert L. Mason 1940-5-10 14804 Lake Obsidian pond, north of Lower Lake. Comment
  UC672555  Antirrhinum coulterianum H. L. Mason 1926-4-26 2949 Los Angeles Pacoima Wash; San Gabriel Mountains Comment
  UC672556  Antirrhinum coulterianum H. L. Mason 1927-6-11 3746 Los Angeles Mount Wilson; San Gabriel Mountains Comment
  UC672564  Antirrhinum nuttallianum subsp. subsessile H. L. Mason 1926-4-25 2907 Orange 5 mi s Laguna Comment
  UC672563  Antirrhinum virga H. L. Mason 1926-1-1 2586 Lake Upper Lake to Elk Mountain Comment
  UC753545  Apiastrum angustifolium Herbert L. Mason 1946-6-7 12837 Santa Barbara 0.5 mi above Cameusa Creek (on road to Oso Gate, San Rafael Range); San Rafael Range 731 Comment
  UC566935  Apocynum androsaemifolium H. L. Mason 1932-5-6 7071 Alameda Oakland Hills, Skyline Blvd. Comment
  UC623309  Apocynum androsaemifolium H. L. Mason 1939-5-18 12104 Napa Wooden Valley Comment
  UC1191809  Apocynum cannabinum Herbert L. Mason and Verne Grant 1947-6-26 13244 Solano Suisun Marsh, Cordelia Slough Comment
  UC665734  Apocynum cannabinum Herbert L. Mason 1942-7-15 12555 Solano 4 1/2 mi. n.w. Vacaville (Buctown Ranch); Buctown Ranch Comment
  RSA131269  Apocynum pumilum var. rhomboideum H. L. Mason 1931-7-14 s.n. San Mateo Pescadero Creek, La Honda Road. Comment
  UC1083127  Aquilegia formosa Herbert L. Mason 1936-7-27 11369 Tuolumne w Tioga Pass (Gaylor Lakes); Sierra Nevada, Yosemite National Park 3200 Comment
  UC634930  Aquilegia formosa H. L. Mason 1923-7-12 586 Tuolumne Mather Sierra Nevada Mtns, Yosemite National Park Comment
  UC635108  Aquilegia pubescens H. L. Mason 1923-7-31 678 Tuolumne Dana Fork Sierra Nevada Mtns Comment
  UC565472  Arabis blepharophylla Herbert L. Mason 1925-3-1 1271 San Francisco Bernal Heights San Francisco Comment
  UC559954  Arabis drummondii H. L. Mason 1936-7-31 11464 Mono e of Saddlebag Lake; Sierra Nevada, Tioga Crest 3474 Comment
  UC1178916  Arabis pulchra Herbert L. Mason 1935-4-30 8351 Kern Walker Pass Comment
  GH343975  Arbutus menziesii H. L. Mason 1930-10-25 5751 Unknown Headwaters of Arroyo Seco, Santa Lucia Mountains Comment
  CAS-BOT-BC407766  Arceuthobium abietinum Herbert L. Mason 1924-6-26 1101 Tuolumne Ridge north of Middle Fork near Mather, Yosemite National Park Comment
  UC1039599  Arceuthobium campylopodum Herbert L. Mason 1929-12-1 5515 Monterey Huckleberry Hill Carmel Comment
  UC1076468  Arceuthobium campylopodum Herbert L. Mason 1927-7-30 3987 Monterey Cypress Point Comment
  UC1076469  Arceuthobium campylopodum H. L. Mason 1928-4-8 4285 Sonoma Fort Rosa Comment
  UC1039598  Arceuthobium campylopodum Herbert L. Mason 1931-11-1 5888 Monterey rd betw MOnterey and Carmel Comment
  UC571090  Arctostaphylos canescens subsp. canescens H. L. Mason 1926-1-2 2612 Napa Toll House Canyon Mount St. Helena (near summit of mt.) Comment
  GH350222  Arctostaphylos densiflora H. L. Mason 1931-3-7 5805 Unknown Vine Hill School, twelve miles west of Santa Rosa Comment
  JEPS38650  Arctostaphylos glandulosa subsp. glandulosa Herbert L. Mason 1927-9-25 4106 Santa Barbara Pine Ridge Santa Cruz Island, Buena Vista Canyon Comment
  UC571225  Arctostaphylos glandulosa subsp. glandulosa H. L. Mason 1925-1-23 1205 a Napa Wooden Valley Grade Comment
  CAS-BOT-BC40089  Arctostaphylos myrtifolia H. L. Mason 1926-5-30 3339 Amador Hill south of Ione Comment
  RSA381123  Arctostaphylos myrtifolia George Mason, Roman Gankin 1956-10-27 192 Calaveras 1/2 mi. N of Mokolumne River behind high cliffs. Located right across the river from Comanche in Calaveras Co. Comment
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Jan 10 2014
  UC571080  Arctostaphylos myrtifolia H. L. Mason 1928-5-3 4468 Amador one mi s Ione Comment
  UCD52533  Arctostaphylos myrtifolia Geo. Mason; Roman Gankin 1956-10-27 192 Calaveras 1/2 mi. N of Mokolumne River behind high cliffs; located right across the river from Comanche in Calaveras County. Comment
  UCD52844  Arctostaphylos nevadensis G. W. Mason 1958-5-25 301 El Dorado 50 yds. north from U.S. Hwy. 50 on either side of gravel road leading down to a bog at eastern foot of Meyers Grade. Comment
  UC634746  Arctostaphylos nummularia Herbert L. Mason 1927-7-31 3997 Santa Cruz hills s Mt. Herman Comment
  A362003  Arctostaphylos pechoensis var. viridissima H. L. Mason 1938-5-8 11803 Unknown vicinity of the summit of Figueroa Mountain Comment
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Feb 19 2015
  UCD53471  Arctostaphylos pechoensis var. viridissima H. L. Mason 1934-3-31 8055 Santa Barbara La Purrissima Ridge; north of Lompoc. Comment
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Dec 9 2008
  CAS-BOT-BC44766  Arctostaphylos purissima H. L. Mason 1938-5-7 11776 Santa Barbara Burton Mesa Comment
  UC571217  Arctostaphylos purissima H. L. Mason 1923-6-15 416 a Santa Barbara Harris Grade Comment
  UC571226  Arctostaphylos stanfordiana H. L. Mason 1926-1-2 2611 Napa Toll House Canyon Mount St. Helena Comment
  UC571221  Arctostaphylos tomentosa subsp. eastwoodiana Herbert L. Mason 1934-3-31 8052 Santa Barbara n Lompoc; La Purissima Ridge Comment
  UC634745  Arctostaphylos uva-ursi H. L. Mason 1930-3-9 5520 Marin summit of promontory Point Reyes Comment
  GH362400  Arctostaphylos viscida H. L. Mason 1928-5-3 4466 Unknown one mile south of Ione Comment
  RSA381125  Arctostaphylos viscida subsp. viscida George Mason, John M. Tucker, Roman Gankin, C. T. Mason 1956-10-27 193 Calaveras 1/2 mi. N of Mokolumne River behind high cliffs. Located right across the river from Comanche in Calaveras Co. Comment
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Jan 10 2014
  SBBG83956  Arctostaphylos viscida subsp. viscida G. Mason, J. M. Tucker, R. Gankin 1956-10-27 193 Amador 0.5 mi N of Mokelumne River behind high cliffs, across the river from Comanche Comment
  UC571237  Arctostaphylos viscida subsp. viscida H. L. Mason 1928-5-3 4466 Amador one mi s Ione (type loc.) Comment
  UC712379  Arenaria kingii var. glabrescens Herbert L. Mason 1936-7-28 11420 Mono vicinity of Mount Dana Sierra Nevada, Mount Dana, Dana Plateau 335 Comment
  UC1081559  Arnica mollis Herbert L. Mason 1936-7-31 11477 Mono near Saddlebag Lake; Sierra Nevada, Yosemite National Park, Tioga Crest 3200 Comment
  UC1093881  Arnica mollis Herbert L. Mason 1938-7-30 12053 Tuolumne Tiltill Mountain (south end) Sierra Nevada, Yosemite National Park, Tiltill Mountain 2590 Comment
  UC712194  Arnica nevadensis Herbert L. Mason 1936-7-31 11469 Mono near Saddlebag Lake; Sierra Nevada, Tioga Crest 3291 Comment
  UC588138  Asarum lemmonii Herbert L. Mason May 15 - 16, 1936 11132 Mariposa East fork of the Chowchilla River, Chowchilla Mountains Comment
  UC543748  Asarum lemmonii Herbert L. Mason 1925-8-11 2213 Tuolumne Big Oak Flat Road near Tuolumne Grove 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
  UC566927  Asclepias speciosa H. L. Mason 1923-7-13 591 Tuolumne Hog.Ranch Mather 1432 Comment
  UC566931  Asclepias vestita H. L. Mason 1934-3-30 8038 Los Angeles Yucca Grove Antelope Valley Comment
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Dec 13 2011
  UC1076337  Aspidotis californica Herbert L. Mason 1924-11-15 1133 Marin Willow Camp via Pipe line Willow Camp; Bolinas Bay Comment
  UC912689  Aspidotis californica Herbert L. Mason 1936-4-12 11075 Amador Lancha Plana Comment
  UC1076342  Aspidotis densa Herbert L. Mason 1926-1-2 2609 Napa Toll House Canyon; Mt St Helena 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
  POM312507  Aster frondosus H. L. Mason 1947-8-11 13487 Modoc Reservoir, Kelley Hot Springs, on Alturas-Conby Highway Comment
  POM312494  Aster occidentalis H. L. Mason 1947-8-9 13480 Modoc East side of Fairchild Swamp, north of Alturas Comment
  CAS-BOT-BC178633  Astragalus coccineus H. L. Mason 1926-4-27 3044 Los Angeles Rock Creek, San Gabriel Mountains Comment
  UC635297  Astragalus didymocarpus H. L. Mason 1932-4-1 6884 Kern five mi s Muroc (Mojave Desert); , s of Muroc Comment
  CAS-BOT-BC177949  Astragalus didymocarpus var. didymocarpus H. L. Mason 1932-4-1 6884 Kern Five miles south of Muroc, Mojave Desert Comment
  UC635304  Astragalus gambelianus H. L. Mason 1928-4-25 4366 San Francisco Hunter's Point Comment
  UC714376  Astragalus kentrophyta var. danaus H. L. Mason 1936-7-30 11446 Tuolumne vicinity Mount Conness (Shepherds Crest); Sierra Nevada, vicin Mount Conness, Shepherds Crest Comment
  CAS-BOT-BC194268  Astragalus oxyphysus H. L. Mason 1930-3-30 5541 San Benito San Benito River Canyon, fourteen miles below Pinnacles Comment
  UC712320  Astragalus purshii var. lectulus H. L. Mason 1936-7-31 11457 Mono e Saddlebag Lake (Tioga Crest, Sierra Nevada); Sierra Nevada, Tioga Crest, e of Saddlebag Lake 3474 Comment
  UC1191184  Athyrium filix-femina var. cyclosorum Herbert L. Mason 1937-7-26 14826 Tuolumne Mahan Peak; Sierra Nevada, Yosemite Nat'l Park 2784 Comment
  UC673343  Athysanus pusillus H. L. Mason 1929-4-29 5237 Lake 2.9 mi w of Lakeport Comment
  UC1191366  Atriplex confertifolia Herbert L. Mason 1948-9-5 13677 a Mono Island in Mono Lake; Island in Mono Lake Comment
  UCD97524  Atriplex lentiformis Herbert L. Mason; S. Galen Smith 1948-8-10 8317 Merced Mendota Pool, at entrance of Firebaugh Canal, west side. Comment
  UCD97819  Atriplex serenana Herbert L. Mason 1927-11-27 4149 Santa Barbara Carpenteria. Comment
  POM312480  Atriplex serenana H. L. Mason, S. Smith 1948-7-29 8232 Merced North Mercy Springs road, about 4 miles N of Los Banos. Comment
  UC1076222  Atriplex triangularis Herbert L. Mason 1927-10-4 4137 Santa Cruz mouth Waddell Creek (Ano Nuevo Point, in marshy ground near the sea); Ano Nuevo Point, mouth of Waddell Creek Comment
  UCD136022  Azolla filiculoides Herbert L. Mason 1947-8-12 13503 Modoc Junction of North and South forks of Pit River, Alturas. Comment
  UC672308  Baccharis pilularis Herbert L. Mason 1925-12-31 2571 Lake Bartlet Mountain Road Comment
  CAS-BOT-BC106767  Baccharis salicifolia H. L. Mason 1921-5-7 s.n. Monterey Rancho del Monte, Carmel River Comment
  UC566709  Baileya pauciradiata H. L. Mason 1928-3-10 4196 Riverside Whitewater River Colorado Desert, Whitewater River Comment
  UC1191425  Bassia hyssopifolia Herbert L. Mason 1946-8-6 12958 Colusa pond on Colusa-Marysville Highway four mi s Colusa (w side of Sacramento River); w side of Sacramento River Comment
  SACT000424  Beckmannia syzigachne Herbert Mason 1953-7-7 Sierra Sierra Valley; Common Comment
  UC1100213  Beckmannia syzigachne Herbert L. Mason and Malcolm A. Nobs 1953-7-7 14558 Sierra pond 1.5 mi e Calpine; Sierra Valley Comment
  UC1192261  Bergia texana Herbert L. Mason, S. Galen Smith 1948-8-18 8347 Kings Just west of Stratford Comment
  UC1192265  Bergia texana Herbert L. Mason 1947-8-8 13462 Modoc Southwest margin of Big Sage Reservior, northwest of Alturas Comment
  UC1192267  Bergia texana Herbert L. Mason 1945-8-24 12681 Lake East Shore, Lower Lake Comment
  UC1192175  Bidens frondosa Herbert L. Mason and Verne Grant 1946-9-4 13108 Butte 833 Canal, West Gridley Road, Butte Sink Butte Sink, 833 Canal, West Gridley Road 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
  UC912219  Bidens frondosa Herbert L. Mason 1929-10-4 5452 Placer 1.5 mi from Auburn Comment
  UC1077120  Blechnum spicant Herbert L. Mason 1926-2-22 2664 Marin Inverness Comment
  UC1076190  Blepharipappus scaber Herbert L. Mason 1931-5-9 5873 Siskiyou 4 mi n of Dunsmuir Comment
  UC642720  Boechera depauperata H. L. Mason 1936-7-28 11401 a Mono vicinity Mount Dana; Sierra Nevada, Dana Plateau 3657 Comment
  CAS-BOT-BC13955  Boechera lemmonii H. L. Mason 1936-7-28 11401 a Mono Sierra Nevada. Vicinity of Mount Dana. Dana Plateau. 3657 Comment
  UC559953  Boechera lemmonii H. L. Mason 1936-7-30 11445 Tuolumne Shepherd's Crest Sierra Nevada, Mount Conness Range 3535 Comment
  UC714371  Boechera lyallii Herbert L. Mason 1936-7-24 11351 Tuolumne White Mountain Mount Conness Range 3505 Comment
  POM257255  Boisduvalia densiflora var. densiflora H. L. Mason 1925-7-16 2163 Tuolumne Hog Ranch Comment
  UC1191178  Bolandra californica Herbert L. Mason 1937-7-26 14825 Tuolumne Mahan Peak Yosemite National Park 2784 Comment
  UC570903  Bolandra californica Herbert L. Mason 1923-7-28 658 Tuolumne head of creek near Porcupine Flat; Yosemite Creek Comment
  CAS-BOT-BC31037  Bolboschoenus maritimus Herbert L. Mason 1948-5-31 13574 San Joaquin three miles north of Ripon. Comment
  UC1100921  Bolboschoenus maritimus Herbert L. Mason, Verne Grant 1946-8-13 13013 Colusa on Williams highway by bridge two mi w Colusa (Butte Sink); , w of Colusa Comment
  CAS-BOT-BC31400  Bolboschoenus robustus Herbert L. Mason 1945-8-16 12660 a Solano Grizzly Island, near Suisun Bay. Comment
  CAS-BOT-BC31351  Bolboschoenus robustus Herbert L. Mason; Verne Grant 1947-6-26 13269 Solano Cordelia Slough, Suisun Marsh. Comment
  UC1077118  Botrychium multifidum Herbert L. Mason 1926-5-30 3311 El Dorado Eagle Creek Lake Tahoe drainage Comment
  UC672624  Botrychium multifidum H. L. Mason 1925-7-30 2196 Tuolumne Smith Peak Trail from Mather Comment
  YM-YOSE67189  Botrychium simplex Harry L. Mason 1938-7-7 11865 Tuolumne MIGUEL MEADOW 1584 Comment
  UC566802  Bowlesia incana Herbert L. Mason 1929-3-24 5103 Madera 18 mi e of Madera (at junction of Yosemite Road) Comment
  UC566857  Bowlesia incana H. L. Mason 1928-4-29 4419 Contra Costa Mount Diablo, Sycamore Canyon Sycamore Canyon; Mount Diablo, Sycamore Canyon 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
  CAS-BOT-BC420226  Boykinia occidentalis H. L. Mason 1921-7-14 s.n. San Mateo Pescadero Creek on the La Honda-Pescadero Road Comment
  UC581157  Brickellia atractyloides H. L. Mason 1935-3-29 8221 San Bernardino w of Searles Lake; Poison Canyon, Mojave Desert 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
  UC635223  Brodiaea elegans subsp. elegans H. L. Mason 1923-7-12 584 Tuolumne Hog Ranch Yosemite National Park Comment
  UC1199832  Brodiaea elegans subsp. elegans Herbert L. Mason 1937-7-25 Tuolumne 1 mi s Lake Vernon (on trail from Beehive); Sierra Nevada, Yosemite National Park 1981 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
  UCD58517  Bromus diandrus Herbert L. Mason; Malcolm A. Nobs 1949-4-27 723 Solano Suisun State Game Refuge. Comment
  CHSC2136  Bromus madritensis subsp. rubens P. Mason 1937-5-23 Glenn Canal bank Ord. Roadsides. Comment
  UC1152954  Bromus tectorum Herbert L. Mason 1963-7-4 15221 Mono Paoha Island, Mono Lake Mono Lake; Paoha Island, Mono Lake Comment
  CAS-BOT-BC18168  Bulbostylis capillaris H. L. Mason 1938-7-13 11946 Mariposa Yosemite National Park. Base of El Capitan, Yosemite Valley. 1226 Comment
  CAS-BOT-BC18172  Bulbostylis capillaris H. L. Mason 1938-7-13 11946 Mariposa Yosemite National Park. Meadow, Base of El Capitan, Yosemite Valley. 1226 Comment
  GH424013  Bulbostylis capillaris H. L. Mason 1938-7-11 11934 Unknown Miguel Meadow, west of Hetch Hetchy 1584 Comment
  RSA23338  Bulbostylis capillaris H. L. Mason 1938-7-13 11946 Mariposa Yosemite National Park; Base of El Capitan, Yosemite Valley 1227 Comment
  UC673291  Cakile edentula Herbert L. Mason 1924-11-16 1145 Marin Stinson Beach, Willow Camp Stinson Beach; , Willow Camp Comment
  UC964761  Cakile maritima Herbert L. Mason 1944-3-17 San Mateo Moss Beach Comment
  UCD57206  Calamagrostis canadensis H. L. Mason 1958-8-6 14862 Tuolumne Yosemite National Park, NW of Hetch-Hetchy, Swamp Lake meadow. Comment
  UCD57543  Calamagrostis purpurascens H. L. Mason 1938-7-28 12407 Tuolumne Yosemite National Park, north of Tiltill Mtn., Macomb Ridge. 3017 Comment
  UC936143  Calendula arvensis Herbert L. Mason 1948-3-14 Amador highway to Jackson, Ione, on a hill near old mines Comment
  GH363408  California macrophylla H. L. Mason 1929-4-25 5209 Unknown Briones Road to Antioch Comment
  UC570778  Callitriche H. L. Mason 1932-3-1 6802 Marin Inverness Ridge Comment
  UC570771  Callitriche H. L. Mason 1932-3-1 6804 Marin w side Olema (to Bolinas Road) Comment
  UC1101528  Callitriche hermaphroditica Herbert L. Mason and Verne Grant 1947-7-10 13348 Modoc 2 mi e Alturas; Dorris Reservoir Comment
  UC570775  Callitriche longipedunculata H. L. Mason Apr 1930 5545 Calaveras 2 miles east of Valley Springs Comment
  UC570759  Callitriche marginata H. L. Mason 1927-4-23 3697 San Mateo Pescadero Creek near Bloomquist's Mill Comment
  UC570761  Callitriche marginata H. L. Mason 1932-3-16 6810 Contra Costa At east edge Walnut Creek, along S.P. Railroad track Comment
  UC570776  Callitriche marginata H. L. Mason Apr 1930 5544 Calaveras 6 miles west of Valley Springs 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
  UC1076512  Calocedrus decurrens H. L. Mason 1923-7-13 589 Tuolumne Hog.Ranch (Mather) Sierra Nevada Mountains, Yosemite National Park 1432 Comment
  UC672158  Calochortus albus Herbert L. Mason 1928-5-3 4480 Amador s of Clark Creek; Cosumnes River Comment
  JROH4615  Calochortus argillosus H. L. Mason 1921-6-4 s.n. San Mateo Jasper Ridge Biological Preserve, Stanford University Comment
  UC1199840  Calochortus clavatus Herbert L. Mason 1940-5-4 12263 Merced 2 mi n Ortegalita Peak; Inner South Coast Ranges, Ortegalita Canyon 396 Comment
  UC1056424  Calochortus nudus Herbert L. Mason 1936-7-12 11224 Mariposa Glacier Point road Peregoy Meadow 2255 Comment
  UC672151  Calochortus tolmiei Herbert L. Mason 1928-4-8 4283 Sonoma Fort Ross 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
  UC912590  Calycadenia multiglandulosa Herbert L. Mason 1928-4-28 4410 Marin Tiburon Peninsula Comment
  UC912615  Calycadenia truncata Herbert L. Mason 1929-10-20 5512 Alameda Mount Hamilton Range, Cedar Mountain Comment
  UC635501  Calycanthus occidentalis H. L. Mason 1927-5-10 3718 Butte near Oroville (Coal Creek, n side of Table Mountain); Table Mountain, Coal Creek Comment
  UC1076560  Calyptridium monospermum Herbert L. Mason 1938-7-22 11963 Tuolumne n of Hetch Hetchy (Vernon Lake Trail); Sierra Nevada, Yosemite National Park, Vernon Lake Trail 2072 Comment
  UC1540432  Calyptridium quadripetalum Herbert L. Mason 1936-4-26 11097 a Lake 16 mi ne of Clear Lake (Bartlett Springs); Bartlett Springs 792 Comment
  UC1191637  Calystegia sepium subsp. binghamiae Herbert L. Mason, Verne Grant 1946-8-21 13067 San Joaquin Holt Holt (in tules) Comment
  UC1191640  Calystegia sepium subsp. binghamiae Herbert L. Mason, Verne Grant 1947-6-26 13251 Solano Cordelia Slough , Cordelia Slough (Suisun Marsh) Comment
  UC672139  Camassia quamash subsp. breviflora Herbert L. Mason 1926-5-29 3300 Nevada Truckee River; Sierra Nevada, Truckee River Comment
  UC635287  Camissonia campestris subsp. campestris H. L. Mason 1929-3-31 5153 Contra Costa Antioch San Joaquin River (sand dike along river) Comment
  POM257265  Camissonia campestris subsp. campestris H. L. Mason 1929-3-23 5089 Tulare Three miles above Springville, Middle Tule River. Comment
  POM257262  Camissonia claviformis subsp. claviformis H. L. Mason 1926-4-27 3038 Los Angeles Rock Creek. Comment
  UC635395  Camissonia strigulosa H. L. Mason 1926-6-6 3372 Santa Cruz grain fields about Felton Comment
  CAS-BOT-BC191091  Camissonia tanacetifolia subsp. tanacetifolia Herbert Louis Mason 1947-8-13 13523 Modoc N side of F Reservoir, N of Canby. Comment
  UC635398  Camissoniopsis cheiranthifolia subsp. cheiranthifolia Herbert L. Mason 1927-10-4 4118 Santa Cruz mouth of Waddell Creek Ano Nuevo Pt. Comment
  UC635407  Camissoniopsis intermedia H. L. Mason 1929-3-15 5048 Contra Costa Nortonville 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
  UC1178942  Campanula exigua Herbert L. Mason 1940-5-5 12281 San Benito about 20 mi se Paicines; Panoche Pass Comment
  SEINET10463136  Campanula prenanthoides Mason 1925-8-11 Mason 2218 Tuolumne BIG OAK FLAT RD TO TUOLUMNE GROVE Comment
  UC971910  Campanula scouleri Herbert L. Mason 1950-7-15 14059 Trinity summit of grade Scott Mountain (on hillslopes) Comment
  CAS-BOT-BC76300  Canbya candida Herbert L. Mason 1935-4-30 10006 Kern Walker Pass. Comment
  UC634893  Canbya candida Herbert L. Mason 1926-4-26 3020 Los Angeles Little Rock Creek Mojave Desert Comment
  SEINET10904746  Canbya candida Mason 1935-4-30 Mason 10006 Kern Walker pass, southern sierra nevada. Comment
  POM312901  Cannabis sativa H. L. Mason, Verne Grant 1946-8-21 13058 San Joaquin West of Stockton on Borden Hwy; Marsh Plant Survey. Comment
  UC1192294  Cannabis sativa Herbert L. Mason, Verne Grant 1946-8-21 13058 San Joaquin w of Stockton (on Borden Highway) Comment
  UC673298  Cardamine californica Herbert L. Mason 1925-1-18 1180 Marin hills n San Rafael; hills n of San Rafael Comment
  UC965608  Carex angustata Herbert L. Mason 1952-7-11 14321 Nevada 1 mi w University of California Trout Laboratory; Sierra Nevada, Sage Hen Creek 1981 Comment
  CHSC2105  Carex barbarae P. Mason 1937-5-15 Butte Fish wheel on Butte Creek. 91 Comment
  UC1100429  Carex barbarae Herbert L. Mason, Verne Grant 1946-9-4 13100 Sutter Butte Sink, Colusa Gun Club Comment
  CAS-BOT-BC110208  Carex buxbaumii H. L. Mason 1938-7-11 11942 Tuolumne Yosemite National Park. South island in Swamp Lake, west of Hetch Hetchy. 1584 Comment
  UC599114  Carex buxbaumii H. L. Mason 1938-7-11 11942 Tuolumne w Hetch Hetchy (South island in Swamp Lake); Yosemite National Park, Swamp Lake, South island 1584 Comment
  UC599133  Carex buxbaumii H. L. Mason 1938-7-9 11890 Tuolumne w Hetch Hetchy; Yosemite National Park, Swamp Lake 1584 Comment
  YM-YOSE65389  Carex buxbaumii H. L. Mason 1938-7-11 11942 Tuolumne SWAMP LAKE RESEARCH RESERVE. SOUTH ISLAND Comment
  UC714228  Carex congdonii H. L. Mason 1936-7-22 11267 Tuolumne w spur of Ragged Peak Sierra Nevada, Conness Range, Ragged Peak Comment
  RSA23336  Carex cusickii H. L. Mason 1938-7-10 11923 Tuolumne South island in Swamp Lake, west of Hetch Hetchy, 1585 Comment
  YM-YOSE65410  Carex cusickii H. L. Mason 1938-7-10 11923 Tuolumne SWAMP LAKE RESEARCH RESERVE. SOUTH ISLAND 1584 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
  UC599113  Carex echinata subsp. echinata H. L. Mason 1938-7-10 11922 Tuolumne w Hetch Hetchy (south island in Swamp Lake); Yosemite National Park 1584 Comment
  UCD140298  Carex echinata subsp. phyllomanica Herbert L. Mason 1946-5-18 12760 Mendocino east of Fort Bragg. Comment
  CAS-BOT-BC20153  Carex feta H. L. Mason 1938-7-9 11893 Tuolumne Yosemite National Park. Swamp Lake, west of Hetch Hetchy. 1584 Comment
  UC1056298  Carex feta Herbert L. Mason 1939-7-11 12116 Tuolumne marsh 1/2 mi below Swamp Lake 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
  SEINET10921841  Carex helleri Herbert L. Mason 1935-7-23 Mason 11270 Tuolumne Alpine slopes east of the summit of Mount Conness, Sierra Nevada. Comment
  YM-YOSE65445  Carex heteroneura H. L. Mason 1938-7-30 12056 Tuolumne SOUTH END TILTILL MTN. 2590 Comment
  CAS-BOT-BC28404  Carex lenticularis var. lipocarpa Herbert L. Mason 1938-7-10 11919 Tuolumne South island in Swamp Lake, W of Hetch Hetchy. 1584 Comment
  CAS-BOT-BC31525  Carex limosa Herbert L. Mason 1952-8-16 14484 Nevada Meadow opposite Univ of CA Trout Laboratory. Sage Hen Creek. 1981 Comment
  UC599140  Carex limosa H. L. Mason 1938-7-10 11906 Tuolumne w Hetch Hetchy; Yosemite National Park, Swamp Lake, South Island 1584 Comment
  UC965611  Carex limosa Herbert L. Mason 1952-8-16 14484 Nevada meadow opposite University of California Trout Laboratory; Sierra Nevada, Sage Hen Creek 1981 Comment
  UC1100496  Carex nebrascensis Herbert L. Mason, Verne Grant 1947-7-10 13354 Modoc 1/4 mi w Dorris Reservoir (2 mi e of Alturas) Comment
  SEINET8055413 Image available Carex nebrascensis H. L. Mason, V. Grant 1947-7-12 13435 Modoc Corporation Ranch Headquarters, N of Likely Comment
  UC1100494  Carex nebrascensis Herbert L. Mason, Verne Grant 1947-8-8 13457 Modoc n Big Sage Reservoir (nw of Alturas); Ingalls Swamp Comment
  CAS-BOT-BC119358  Carex obnupta Herbert L. Mason 1946-5-18 12761 Mendocino Sphagnum bog E of Fort Bragg. Comment
  UC1100485  Carex obnupta Herbert L. Mason 1949-7-7 14026 Santa Clara Mouth of Gazos Creek Gazos Creek Comment
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Sep 19 2021
  POM313115  Carex praegracilis H. L. Mason, Verne Grant 1947-7-12 13439 Modoc Corporation Ranch Headquarters, north of Likely. Comment
  CAS-BOT-BC118797  Carex preslii H. L. Mason 1938-7-30 12059 Tuolumne S end of Tiltill Mountain. 2590 Comment
  YM-YOSE65519  Carex preslii H. L. Mason 1938-7-30 12059 Tuolumne SOUTH END TILTILL MTN. 2590 Comment
  UC599119  Carex raynoldsii H. L. Mason 1938-7-30 12057 Tuolumne s end Tiltill Mountain; Yosemite National Park 2590 Comment
  UC1100465  Carex simulata Herbert L. Mason 1947-8-13 13538 a Modoc n Canby (ne side of F reservoir) Comment
  UC965605  Carex simulata Herbert L. Mason 1952-8-16 14479 Nevada meadow opposite University of California Trout Laboratory; Sierra Nevada, Sage Hen Creek 1981 Comment
  UC599120  Carex specifica H. L. Mason 1938-7-30 12058 Tuolumne Tiltill Mountain, S end Yosemite Natonal Park 2590 Comment
  CAS-BOT-BC115934  Carex subfusca Herbert L. Mason 1952-8-16 14488 Nevada Meadow opposite University of CA Trout Laboratory, Sage Hen Creek. 1981 Comment
  UC1100569  Carex vesicaria Herbert L. Mason, Lawrence W. Reinecke 1937-7-22 11572 Tuolumne S. Miguel Meadows (Swamp Lakes, in the hills west of Hetch Hetchy dam.); Yosemite National Park 1584 Comment
  UC1102959  Carex vesicaria Herbert L. Mason 1958-8-9 14887 Tuolumne w Hetch Hetchy Dam (Swamp Lake); Sierra Nevada, Yosemite National Park 1584 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
  UC599134  Carex vesicaria H. L. Mason 1938-7-9 11889 Tuolumne w Hetch Hetchy (Swamp Lake); Yosemite National Park 1584 Comment
  YM-YOSE65551  Carex vesicaria H. L. Mason 1938-7-9 11889 Tuolumne SWAMP LAKE RESEARCH RESERVE. SWAMP LAKE WEST OF HETCH HETCHY 1584 Comment
  UC599122  Carex whitneyi H. L. Mason 1938-7-30 12055 Tuolumne South end of Tiltill Mountain 2590 Comment
  CAS-BOT-BC59738  Cassiope mertensiana H. L. Mason 1928-7-5 4877 Mono Tioga Mines. Comment
  CAS-BOT-BC249092  Castilleja affinis H. L. Mason 1921-5-14 s.n. Alameda Haywards [Hayward] Comment
  UC1081503  Castilleja applegatei subsp. martinii H. L. Mason 1926-5-1 3162 San Diego Palomar Mountain Comment
  UC673459  Castilleja attenuata H. L. Mason 1926-3-21 2760 Lake between Middletown and Mount St. Helena; Toll House Canyon Comment
  UC673438  Castilleja densiflora subsp. densiflora H. L. Mason 1928-4-25 4368 San Francisco Hunter's Point Comment
  UC1077125  Castilleja exserta subsp. exserta Herbert L. Mason 1938-5-7 11788 Santa Barbara Burton Mesa Comment
  UC1081507  Castilleja foliolosa H. L. Mason 1925-4-25 2904 Orange 5 mi s Laguna Comment
  JEPS23180  Castilleja lacera Herbert L. Mason 1940-7-6 12318 Tuolumne w of Hetch Hetchy Dam; Yosemite National Park, Miguel Meadows 1584 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
  UC1039789  Castilleja miniata H. L. Mason 1925-7-29 2186 Tuolumne Hog Ranch, Mather; Mather Comment
  UC1275796  Castilleja miniata Herbert L. Mason 1963-8-9 15231 Mono near Mono Lake (w Mono Marsh); Mono Marsh Comment
  RSA0010941  Castilleja minor subsp. minor H. L. Mason 1947-8-11 13493 Modoc On Highway 81, west margin of Lower Lake, near boundary between Lassen and Modoc counties. Comment
  UC1178847  Castilleja nana Herbert L. Mason 1938-7-22 11980 Tuolumne n of Hetch Hetchy (Vernon Lake Trail); Sierra Nevada, Yosemite National Park 2072 Comment
  UC712178  Castilleja nana Herbert L. Mason 1936-7-31 11454 Mono e of Saddlebag Lake (Tioga Crest); Sierra Nevada, Tioga Crest Comment
  UC712358  Castilleja nana Herbert L. Mason 1936-7-23 11287 Tuolumne Mount Conness 3505 Comment
  GH365525  Castilleja pilosa H. L. Mason 1936-7-23 11287 Unknown Mount Conness 3505 Comment
  UC673466  Castilleja rubicundula subsp. lithospermoides H. L. Mason 1928-4-28 4408 Marin Tiburon Peninsula Comment
  UC592154  Caulanthus amplexicaulis H. L. Mason 1927-6-14 3765 San Bernardino San Antonio Canyon San Gabriel Mountains, San Antonio Canyon 1889 Comment
  UC964768  Caulanthus coulteri Herbert L. Mason 1938-4-14 11702 Tulare 4 mi e Exeter (Rocky Hill); e of Exeter Comment
  GH379093  Caulanthus coulteri var. lemmonii H. L. Mason 1952-4-6 14202 Unknown Temblor Range east of Cholame Comment
  UC1051467  Caulanthus coulteri var. lemmonii Herbert L. Mason 1952-4-6 14202 San Luis Obispo Temblor Range e Cholame; Temblor Range e of Cholame Comment
  UC639098  Caulanthus inflatus H. L. Mason 1932-4-2 6896 Kern 3 mi w Muroc (Mohave Desert); , w of Muroc Comment
  CAS-BOT-BC48455  Ceanothus crassifolius Herbert L. Mason; Munz; Peirson 1926-4-30 3120 Riverside Southwestern Riverside Co. - Temecula canyon, 2 miles south of Temecula Comment
  UC634801  Ceanothus crassifolius Herbert L. Mason 1923-6-16 434 Santa Barbara La Combre Peak Comment
  UC634616  Ceanothus dentatus Herbert L. Mason 1923-6-23 557 Monterey Point Lobos--Carmel Comment
  UC634577  Ceanothus griseus Herbert L. Mason 1927-7-30 3990 Monterey Cypress Point Comment
  SEINET11191707  Ceanothus impressus H. Mason 1951-3-31 s.n. Alameda Berkeley. Comment
  UC635515  Ceanothus incanus H. L. Mason 1926-6-23 561 Monterey Cypress Point Carmel Comment
  CAS-BOT-BC51016  Ceanothus integerrimus Herbert L. Mason 1923-7-14 596 a Tuolumne Mather Comment
  UC635527  Ceanothus integerrimus Herbert L. Mason 1925-6-27 2125 Tuolumne Mather (Hog Ranch) Comment
  CAS-BOT-BC51727  Ceanothus lemmonii H. L. Mason 1927-5-19 3714 Butte Cherokee mine, Table Mountain Northeast of Oroville Comment
  GH349712  Ceanothus lemmonii H. L. Mason 1926-5-29 3284 Unknown Rattlesnake Creek five miles south of Grass Valley 609 Comment
  UC634627  Ceanothus lemmonii H. L. Mason 1925-12-31 2575 Lake Bartlett Mountain Comment
  UC634987  Ceanothus lemmonii H. L. Mason 1927-5-19 3714 Butte ne Oroville (Cherokee Mine.); Table Mt. Comment
  UC634615  Ceanothus leucodermis H. L. Mason 1926-4-11 2856 Alameda Rancho Repose, Mount Hamilton Range. Comment
  CAS-BOT-BC51478  Ceanothus oliganthus Herbert L. Mason 1926-4-30 3155 San Diego Palomar Mt. Comment
  UC912387  Ceanothus palmeri Herbert L. Mason 1928-5-3 4488 El Dorado at mouth of Clark Creek near bridge Cosumnes River; Cosumnes River at mouth of Clark Creek Comment
  UC634611  Ceanothus papillosus Herbert L. Mason 1923-6-19 519 Ventura Matileja Mt. Matileja Mt. (Ocean view trail) Comment
  CAS-BOT-BC63335  Ceanothus prostratus Herbert L. Mason 1924-6-16 1046 Plumas Graeagle. Comment
  GH425153  Ceanothus purpureus H. L. Mason 1931-3-8 Unknown Betw. Santa Rosa and Guerneville, 8 mi. w. of Santa Rosa, on ridge beyond slough, near Vine Hill School Comment
  UC525848  Ceanothus thyrsiflorus Herbert L. Mason 1934-4-1 San Luis Obispo twenty mi n Cambria; n of Cambria Comment
  CAS-BOT-BC52387  Ceanothus tomentosus var. tomentosus H. L. Mason 1928-5-3 4467 Amador hills one mile south of Ione Comment
  UC634853  Ceanothus velutinus Herbert L. Mason 1926-3-6 2699 Marin Corte Madera Ridge , Corte Madera Ridge (Mt. Tamalpais) 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
  UC566916  Centaurium venustum H. L. Mason 1923-7-15 601 Tuolumne Salt Log Meadow Sierra Nevada Mountains, Yosemite National Park Comment
  UC1101314  Ceratophyllum demersum Herbert L. Mason 1946-7-27 12955 Lake Upper Lake - Lakeport road Comment
  UC1101386  Ceratophyllum demersum Herbert L. Mason and Verne Grant 1946-8-14 13044 Butte Butte Sink Comment
  UC635511  Ceratophyllum demersum H. L. Mason 1929-9-9 5421 San Joaquin Holt 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
  UC555658  Cercocarpus betuloides var. betuloides Herbert L. Mason 1923-6-17 467 Santa Barbara Mountain Drive Comment
  UC566687  Chaenactis fremontii H. L. Mason 1928-3-11 4328 Riverside near Indio Comment
  UC565564  Chaenactis glabriuscula var. glabriuscula H. L. Mason 1929-3-31 5157 Contra Costa Antioch, sand dikes along San Joaquin River San Joaquin River, Antioch Comment
  JEPS34165  Chaenactis glabriuscula var. heterocarpha H. L. Mason 1929-4-28 Lake Hopland Grade Comment
  UC1178835  Chaenactis glabriuscula var. heterocarpha Herbert L. Mason 1940-5-3 12267 Merced nw of Ortigalita Peak; South Coast Ranges, Ortigalita Valley 426 Comment
  CAS-BOT-BC277771  Chaenactis nevadensis Herbert L. Mason 1936-7-6 11141 Mariposa Sierra Nevada, Yosemite National Park. Hetch Hetchy Trail west of Yosemite Creek 2286 Comment
  UC565573  Chaenactis stevioides H. L. Mason 1932-4-1 6875 Kern road from Roosevelt to Muroc Muroc; Mojave Desert Comment
  UC570799  Chamaesyce albomarginata H. L. Mason 1930-4-20 5562 Kern Tehachapi Mtns, Caliente Creek Comment
  UC570789  Chamaesyce polycarpa H. L. Mason 1926-4-25 2912 Orange 5 mi s Laguna Comment
  UC635594  Chamaesyce polycarpa H. L. Mason 1925-4-18 1495 San Diego hills near San Diego (Navy fuel dock) Comment
  UC1192287  Chamaesyce serpyllifolia Herbert L. Mason and S. Galen Smith 1948-8-9 8281 Merced ca 10 mi w summit of Pacheco Pass; Pacheco Creek Comment
  UC1076335  Cheilanthes gracillima Herbert L. Mason 1925-2-1 1221 Marin Mt Tamalpais Comment
  UC1076345  Cheilanthes intertexta Herbert L. Mason 1926-1-1 2583 Lake Upper Lake to Elk Mt Comment
  UC1076555  Chenopodium ambrosioides Herbert L. Mason 1928-9-30 4963 San Joaquin near Holt; San Joaquin delta Comment
  UC965592  Chenopodium atrovirens Herbert L. Mason 1952-7-19 14407 Nevada meadow opposite University of California Trout Laboratory; Sage Hen Creek 1981 Comment
  UC1093855  Chenopodium botrys Herbert L. Mason 1925-8-6 2210 Tuolumne Mather; on railroad balast Comment
  UC1199816  Chenopodium californicum Herbert L. Mason 1929-3-31 5158 Contra Costa Antioch Sacramento River Comment
  UC1191343  Chenopodium glaucum Herbert L. Mason 1947-8-15 13554 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
  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
  UC1093852  Chenopodium pumilio Herbert L. Mason 1933-9-2 7286 Amador Silver Lake Sierra Nevada Comment
  UC1191335  Chenopodium strictum var. glaucophyllum Herbert L. Mason and Verne Grant 1946-8-7 12978 Colusa 8 mi n Colusa; Butte Sink Comment
  GH362630  Chimaphila umbellata H. L. Mason 1924-6-18 1054 Unknown road between Graeagle and Gold Lake Comment
  CAS-BOT-BC191284  Chorizanthe fimbriata var. fimbriata H. L. Mason 1926-4-30 3127 San Diego Tenescal Canyon, Pala Grande (to Palomar Mountain) Comment
  UC912476  Chorizanthe membranacea H. L. Mason 1934-4-30 8104 Napa 5 mi s Monticello (tributary of Putah Creek); tributary of Putah Creek Comment
  SD47975  Chorizanthe obovata Herbert L Mason 1946-6-7 12822 Santa Barbara Mono Flat, 0.5 mile west of Camuesa Comment
  CAS-BOT-BC257216  Chorizanthe procumbens H. L. Mason 1936-4-30 3129 San Diego Tenescal [Temescal] Canyon along Pala Grade toward Palomar Mountain Comment
  UC635049  Chorizanthe pungens var. pungens Herbert L. Mason 1923-6-23 565 Monterey Del Monte Comment
  UC635062  Chorizanthe staticoides Herbert L. Mason 1926-4-26 2961 Los Angeles 4 mi w Saugas; w of Saugas 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
  UC1076086  Chrysolepis sempervirens Herbert L. Mason 1929-10-4 5474 El Dorado above Glen Alpine; Fallen Leaf Lake Comment
  CAS-BOT-BC420343  Chrysosplenium glechomifolium H. L. Mason 1929-5-10 5286 Del Norte just N of Crescent City Comment
  UC635388  Chylismia cardiophylla subsp. cardiophylla H. L. Mason 1928-3-10 4205 Riverside Hidden Springs Coachella Mountains Comment
  UC604430  Cicendia quadrangularis H. L. Mason 1938-5-7 11773 Santa Barbara nw of Lompoc (Burton Mesa); Burton Mesa Comment
  UC673484  Cicuta douglasii H. L. Mason 1940-7-7 12325 Tuolumne Tuolumne River drainage sw of Hetch Hetchy ( Yosemite National Park, Poison Meadow); Sierra Nevada, Yosemite National Park, Poison Meadow 1524 Comment
  UC1191961  Cicuta maculata var. bolanderi Herbert L. Mason, Verne Grant 1947-6-26 13270 Solano Suisun Marsh, Cordelia Slough Suisun Marsh; , Cordelia Slough Comment
  UC634668  Circaea alpina subsp. pacifica H. L. Mason 1925-7-30 2191 Tuolumne Smith Peak Trail from Mather Comment
  UC1093963  Cirsium occidentale var. californicum Herbert L. Mason 1946-6-7 12831 Santa Barbara s of Little Pine Mountain (between Camuesa Creek and Oso Creek) 762 Comment
  UC912552  Cirsium occidentale var. californicum Herbert L. Mason 1932-4-24 6975 Calaveras Mokulumne River Bridge Mokulumne River, Comanche Comment
  UC632833  Cirsium occidentale var. californicum H. L. Mason 1936-5-15 11122 Mariposa road from Coulterville to Bagby Comment
Read comments
Aug 5 2008
  CAS-BOT-BC169770  Cistanthe quadripetala Herbert L. Mason 1935-5-30 10010 Napa 4 miles N of Knoxville on the Monticello - Lower lake Road Comment
  GH376994  Cistanthe quadripetala H. L. Mason 1935-5-30 10010 Unknown Four miles north of Knoxville on the Monticello-Lower Lake Road Comment
  UC634707  Clarkia affinis H. L. Mason 1932-4-17 6947 Santa Clara Uvas-Almaden Road 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
  POM257280  Clarkia breweri H. L. Mason 1928-5-6 4557 Alameda Cedar Mountain, Mount Hamilton Range. Comment
  UC634699  Clarkia cylindrica subsp. cylindrica H. L. Mason 1929-6-2 5356 Kern 30 mi from Bakersfield; Tehachapi Mountains, Tejon Pass Comment
  POM257244  Clarkia purpurea subsp. purpurea H. L. Mason 1928-4-26 4379 Contra Costa Around Berkeley and Oakland. Comment
  CAS-BOT-BC163824  Clarkia purpurea subsp. quadrivulnera H. L. Mason 1921-5-7 s.n. Monterey Rancho del Monte, Carmel River Comment
  CAS-BOT-BC164562  Clarkia purpurea subsp. viminea H. L. Mason 1921-7-3 s.n. San Mateo Pescadero - La Honda Road Comment
  POM257281  Clarkia unguiculata H. L. Mason 1926-5-26 3250 Alameda Bluffs near Sunol, Niles Canyon. Comment
  POM257253  Clarkia williamsonii H. L. Mason 1925-7-4 2149 Tuolumne Mather. Comment
  JEPS43337  Claytonia exigua subsp. exigua H. L. Mason 1931-4-5 Contra Costa se of Mt. Diablo (on road from Marsh Creek to Livermore); Upper Marsh Creek Comment
  CAS-BOT-BC439161  Claytonia exigua subsp. exigua H. L. Mason 1925-3-7 1281 Alameda Junction 1/2 mile southwest of Sunol Comment
  CAS-BOT-BC229128  Claytonia megarhiza Herbert L. Mason 1935-7-29 s.n. Mariposa Yosemite National Park. Bernice Lake Comment
  UC1056449  Claytonia rubra subsp. rubra Herbert L. Mason 1936-7-12 11230 Mariposa Glacier Point; Sierra Nevada, Yosemite National Park, Peregoy Meadow 2255 Comment
  UC635490  Claytonia sibirica H. L. Mason 1928-10-21 5004 Mendocino n of Fort Bragg (Pudding Creek); Pudding Creek Comment
  UC635492  Claytonia sibirica H. L. Mason 1926-2-21 2655 Marin road from Inverness to Point Reyes Lighthouse (near summit of grade) Comment
  CAS-BOT-BC443947  Claytonia sibirica H. L. Mason 1926-2-21 2655 Marin Road from Inverness to Point Reyes Lighthouse Comment
  UC581160  Cleomella obtusifolia H. L. Mason 1935-3-29 8234 San Bernardino w side Searles Lake; Mojave Desert Comment
  UC545818  Collinsia callosa Herbert L. Mason 1935-4-29 10002 Kern 2 mi w Walker Pass Comment
  UC1093961  Collinsia childii Herbert L. Mason 1946-6-8 12863 Santa Barbara n side Big Pine Mtn (headwaters of the Upper Sisquoc River); , San Rafael Mtns, Upper Sisquoc River 1920 Comment
  UC632787  Collinsia greenei H. L. Mason 1936-4-26 11094 Lake e side Bartlett Mtn; Inner North Coast Ranges 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
  UC672460  Collinsia parviflora H. L. Mason 1929-5-9 5271 Mendocino 5 mi w of Laytonville 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
  UC1191142  Collomia diversifolia Herbert L. Mason 1953-6-8 14522 Lake Black Oak Villa Butts Canyon Comment
  SEINET8729290 Image available Collomia diversifolia Herbert L. Mason 1948-1 13570 Napa Near head of Butts Canyon Comment
  UC1191143  Collomia heterophylla Herbert L. Mason 1953-6-8 14521 Lake Black Oak Villa Butts Canyon Comment
  UC965590  Collomia linearis Herbert L. Mason 1952-7-18 14396 Nevada upstream from University of California Trout Laboratory; Sierra Nevada, Sage Hen Creek 1981 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
  UC629725  Collomia rawsoniana H. L. Mason 1938-7-16 11954 Madera three mi e South Fork (on a tributary to Whisky Creek); Cascadel Ranch 1127 Comment
  UC1191642  Collomia tinctoria Herbert L. Mason 1948-7-18 13606 b Siskiyou Grass Lake Comment
  UC907800  Collomia tinctoria Herbert L. Mason 1946-6-8 12862 Santa Barbara n side of mountain San Rafael Mountains, Big Pine Mountain Comment
  CAS-BOT-BC157359  Comarum palustre Herbert L. Mason 1940-7-25 12331 El Dorado Grass Lake, Luther Pass 2377 Comment
  SBBG72464  Comarum palustre H. L. Mason 1940-7-25 12331 El Dorado Grass lake, Luther Pass 2377 Comment
  UCD113216  Comarum palustre H. L. Mason 1940-7-25 12331 El Dorado Grass Lake, Luther Pass. 2377 Comment
  RSA114062  Convolvulus simulans H. L. Mason 1952-4-27 14282 San Benito About 3 miles from mouth of San Carlos Canyon Comment
  UC1093962  Convolvulus simulans Herbert L. Mason 1946-6-7 12833 Santa Barbara ridge between Camuesa Creek and Oso Creek (s of Little Pine Mt.) 762 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
  UC672179  Conyza canadensis H. L. Mason 1927-10-4 4112 a Alameda University of California Berkeley Campus Comment
  UC673552  Corallorhiza striata H. L. Mason 1926-5-31 3347 Calaveras Calaveras Big Trees Comment
  POM312576  Cordylanthus mollis subsp. hispidus H. L. Mason, S. Galen Smith 1948-8-9 8306 Merced Along old Santa Fe Grade, 2 miles north of Dos Palos Comment
  UC672487  Cordylanthus tenuis subsp. tenuis H. L. Mason 1925-7-30 2193 Tuolumne ne Mather (Smith Peak Trail) Comment
  CAS-BOT-BC287722  Coreopsis bigelovii Herbert L. Mason 1932-4-1 6882 Kern 5 miles S of Muroc, Mojave Desert Comment
  UC566769  Coreopsis bigelovii Herbert L. Mason 1932-4-1 6882 Kern 5 mi s Muroc; Mojave Desert Comment
  UC566773  Coreopsis bigelovii Herbert L. Mason 1926-4-27 3046 Los Angeles between Rock Creek and Little Rock Creek (on Big Pines Recreation Camp road) Comment
  UC566774  Coreopsis californica var. californica Herbert L. Mason 1932-4-1 6872 Los Angeles 1 mi e Lancaster; Mojave Desert Comment
  UC545811  Coreopsis stillmanii Herbert L. Mason 1936-3-21 11019 Tuolumne 4 mi n Coulterville Comment
  POM289573  Coreopsis stillmanii H. L. Mason 1936-3-21 11019 Tuolumne 4 miles north of Coulterville Comment
  CAS-BOT-BC101399  Corethrogyne filaginifolia Herbert L. Mason 1928-4-25 4365 San Francisco [Hunter's] Hunters Point Comment
  JEPS15881  Corethrogyne filaginifolia Herbert L. Mason 1927-9-24 4092 Santa Barbara about West Ranch; Santa Cruz Island Comment
  JEPS15883  Corethrogyne filaginifolia Herbert L. Mason 1927-9-24 4090 Santa Barbara about West Ranch; Santa Cruz Island Comment
  UC1093911  Corethrogyne filaginifolia Herbert L. Mason 1936-9-13 11529 Santa Clara w Madrone Station Comment
  UC672301  Corethrogyne filaginifolia H. L. Mason 1927-9-24 4092 Santa Barbara slopes about West Ranch; Santa Cruz Island Comment
  UC634827  Cornus glabrata H. L. Mason 1929-10-12 5486 San Luis Obispo 4.3 mi. w. Atascadero (along Atascadero Creek) Comment
  CAS-BOT-BC212020  Cornus nuttallii H. L. Mason 1928-7-14 4897 Humboldt East fork of Eel River near Garberville Comment
  UC634647  Cornus nuttallii H. L. Mason 1925-7-20 2200 Tuolumne Smith Peak Trail from Mather; Yosemite Nat'l Park Comment
  UC634636  Cornus sericea subsp. sericea H. L. Mason 1924-6-19 1076 Plumas margin of Bear lake Comment
  CAS-BOT-BC210523  Cornus sessilis Herbert L. Mason 1935-3-14 10984 Calaveras South fork of the Mokelumne River, about three miles northeast of Glencoe Comment
  UCD130902  Cotula coronopifolia Herbert L. Mason; Verne Grant 1947-6-26 13241 Solano Cordelia Slough, Suisun Marsh. Comment
  UC1192139  Cotula coronopifolia herbert l. mason, malcolm a. nobs 1949-4-27 724 Solano Suisun State Game Refuge Comment
  UC571142  Crassula tillaea Herbert L. Mason 1927-4-23 3690 San Mateo along roadside between La Honda and Pescadero Creek Comment
  UC602783  Crepis nana H. L. Mason 1936-7-30 11451 Mono Excelsior Peak Comment
  UC566624  Crocidium multicaule H. L. Mason 1932-3-6 6809 Alameda 20 mi s Livermore; Mount Hamilton Range, Arroyo Mocho Comment
  SACT000807  Crypsis niliacea Herbert Mason 1945-7-11 Colusa Alkali Plains 3 miles above Colusa Comment
  SEINET200145 Image available Crypsis schoenoides H. L. Mason 1945-9-18 12706 Sutter Overflow lands of Sutter By-pass near bridge on Yuba City-Knight's Landing highway. Comment
  UCD59826  Crypsis schoenoides H. L. Mason 1945-9-19 12729 Butte Gray Lodge Game Refuge, northwest of Pennington. Comment
  UC573091  Cryptantha barbigera Herbert L. Mason 1928-3-10 4228 Riverside Hidden Springs Canyon Coachella Mts. Comment
  UC573069  Cryptantha circumscissa H. L. Mason 1932-4-1 6868 Los Angeles 1 mi e Lancaster; Mojave Desert Comment
  UC573074  Cryptantha clevelandii H. L. Mason 1923-6-15 400 Santa Barbara Harris Grade La Purissima Ridge Comment
  UC573096  Cryptantha flaccida H. L. Mason 1926-4-11 2853 Alameda Cedar Mountains and Rancho Repose Mount Hamilton Range Comment
  GH420039  Cryptantha holoptera H. L. Mason 1928-3-10 4232 Unknown Hidden Springs Canyon, Coachella Mts. Comment
  UC573152  Cryptantha leiocarpa Herbert L. Mason 1926-4-18 2874 San Francisco s of Cliff House; San Francisco Comment
  UC573098  Cryptantha nevadensis H. L. Mason 1926-4-28 3107 San Bernardino Box S Ranch Comment
  UC573128  Cryptantha virginensis H. L. Mason 1934-3-28 8027 Inyo Near summit of Panamint Range, Townsend (Towne's ?) Pass. Comment
  UC1093684  Cryptogramma acrostichoides Herbert L. Mason 1926-7-12 2894 Plumas Mt Elwell Comment
  UC1093851  Cupressus arizonica subsp. nevadensis Herbert L. Mason 1956-3-29 14662 Kern slopes s Bodfish; Piute Mountains 1066 Comment
  UC1179020  Cupressus goveniana subsp. pygmaea Herbert L. Mason 1928-10-21 4995 Mendocino Fort Bragg Comment
  UC665713  Cupressus goveniana subsp. pygmaea Herbert L. Mason 1934-9-3 8147 Mendocino white plains 3 mi e of Mendocino City Comment
  UC1076384  Cupressus lawsoniana H. L. Mason 1932-7-21 7111 Humboldt on road Arcata to Weaverville (e slope of Southfork Mts.); Southfork Mts. Comment
Read comments
Jul 25 2018
  CAS-BOT-BC85533  Cupressus macrocarpa Herbert L. Mason 1934-10-21 10023 Monterey Point Lobos. Comment
  A356121  Cupressus sargentii H. L. Mason 1926-4-16 Unknown Cedar Mountain, near summit Comment
  UC1083214  Cupressus sargentii Herbert L. Mason 1926-1-2 2606 Napa Toll House Canyon Mt. St. Helena, Toll House Canyon Comment
  UC1191664  Cuscuta californica Herbert L. Mason and Verne Grant 1946-9-27 13132 Butte Graylodge Game Refuge Butte Sink Comment
  SBBG104324  Cuscuta californica var. graciliflora H. L. Mason 1925-1 2055 Unknown San Quintin Bay, Revillagigedo Islands Comment
  UC1178941  Cuscuta indecora Herbert L. Mason 1945-10-21 12743 Lake 3 mi e Middletown Comment
  UCD126351  Cuscuta subinclusa Herbert L. Mason; Verne Grant 1947-6-26 13249 Solano Cordelia Slough, Suisun Marsh. Comment
  UCD141000  Cyperus acuminatus Herbert L. Mason; Verne Grant 1946-8-6 12969 Colusa 2.7 miles north of Colusa between Sacramento River and Butte Creek. Comment
  SEINET200024  Cyperus difformis Herbert L. Mason 1945-9-18 12705 Sutter Sutter bypass near bridge on Yuba City-Knight's Landing Highway. Comment
  UCD141018  Cyperus difformis Herbert L. Mason; Verne Grant 1946-8-7 12983 Colusa 8 miles north of Colusa. Comment
  UCD141019  Cyperus difformis Herbert L. Mason; S. Galen Smith 1948-8-11 8328 Merced Crane Ranch, south of junction of Merced and San Joaquin Rivers. Comment
  UC1100520  Cyperus eragrostis Herbert L. Mason and S. Galen Smith 1948-8-11 8325 Merced ca. 5 mi. w. Merced; San Joaquin Valley, Black Rascal Creek Comment
  UC1100521  Cyperus eragrostis Herbert L. Mason and S. Galen Smith 1948-8-9 8289 Santa Clara ca. 10 mi. w. of summit Pacheco Pass (Pacheco Creek); Pacheco Creek Comment
  UC1100527  Cyperus eragrostis Herbert L. Mason and Verne Grant 1946-9-5 13117 Colusa 1.6 mi. w. Williams (rd. to Lake Co.) Comment
  UC698544  Cyperus eragrostis Herbert L. Mason 1926-5-24 3222 Alameda U.C. Campus Berkeley; , U.C. Campus Comment
  UC1100518  Cyperus erythrorhizos Herbert L. Mason 1945-9-19 12738 Butte Gray Lodge Game Refuge n.w. Pennington; Gray Lodge Game Refuge Comment
  UC1100519  Cyperus erythrorhizos Herbert L. Mason 1945-9-19 12724 Colusa 1 mi. n. Colusa (e. bank Sacramento R., below causeway over Butte Sink spillway,); Sacramento R. Comment
  UC1100670  Cyperus erythrorhizos Herbert L. Mason and S. Galen Smith 1949-7-29 1101 Sutter rice fields in Sutter Bypass just s. Marysville 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
  UC1100673  Cyperus erythrorhizos Herbert L. Mason and S. Galen Smith 1948-9-5 549 Imperial canal above Laguna Dam (Lower Colorado); Lower Colorado Comment
  UC1100675  Cyperus erythrorhizos Herbert L. Mason and S. Galen Smith 1948-7-15 146 Merced Big Water Club e. Gustine; San Joaquin Valley Comment
  UC1100638  Cyperus niger Herbert L. Mason 1946-7-4 12884 Sonoma between Santa Rosa and Forestville (Pitkin Marsh); Pitkin Marsh Comment
  UC1100639  Cyperus niger Herbert L. Mason and S. Galen Smith 1948-8-19 8382 Merced marsh 1 mi. w. Snelling Comment
  CAS-BOT-BC114107  Cyperus squarrosus Herbert L. Mason 1945-8-24 12686 Lake East Shore, Lower Lake. 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
  UC1102958  Cyperus squarrosus Herbert L. Mason 1958-8-6 14898 a Tuolumne w. Hetch Hetchy Dam (at Swamp Lake); Sierra Nevada, Yosemite Nat'l Park, Swamp Lake 1584 Comment
  UC921147  Cyperus squarrosus Herbert L. Mason August, 1930 5710 Lake Clear Lake Comment
  SEINET7582973 Image available Cyperus squarrosus H. L. Mason 1938-7-10 11903 Tuolumne Miguel Meadow, west of Hetch-Hetchy, Yosemite National Park. 1585 Comment
  UCD141107  Cyperus squarrosus Herbert L. Mason; S. Galen Smith 1948-7-29 8247 Merced at end of Turner Island Road. East of Los Banos. Comment
  UCD141158  Cyperus strigosus H. L. Mason 1945-9-18 12702 Sutter Sutter By-pass near bridge on Yuba City. Knight's Landing Highway. Comment
  POM313067  Cyperus strigosus H. L. Mason 1945-9-18 12702 Sutter Margins of pools on overflow lands of Sutter by-pass near bridge on Yuba City-Knight's Landing highway. Comment
  UC1191379  Cypselea humifusa Herbert L. Mason, S. Galen Smith 1948-8-18 8354 Kings Canal just w of Stratford; San Joaquin Valley Comment
  UC641978  Cystopteris fragilis H. L. Mason 1936-7-29 11439 Mono Conness Cirque near Saddlebag Lake (Tioga Pass region); Sierra Nevada Comment
  POM313036  Damasonium californicum H. L. Mason 1927-5-9 3705 Butte Sacramento Valley, 15 mi W of Oroville. 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
  UC1100149  Damasonium californicum Herbert L. Mason 1953-6-16 14552 Sierra 1/4 mi. s. Beckwourth Buttes Comment
  UC1178930  Damasonium californicum Herbert L. Mason 1953-6-8 14532 Lake 1.5 mi. w. Lower Lake Comment
  UCD138001  Damasonium californicum Herbert L. Mason 1946-5-30 12794 Lake Locomono Creek near Middletown. Comment
  UC912647  Danthonia californica H. L. Mason 1928-4-28 4415 Marin Tiburon Peninsula Comment
  UC1191582  Datisca glomerata Herbert L. Mason, S. Galen Smith 1948-8-9 8283 Santa Clara about 10 mi w of summit of Pacheco Pass (Pacheco Creek); Pacheco Creek Comment
  UC912274  Deinandra corymbosa Herbert L. Mason 1932-4-28 7041 Monterey Pajaro Hills Comment
  UC912489  Delphinium Herbert L. Mason 1928-4-13 4326 Sonoma wet marsh and pools near Petaluma Comment
  UC635340  Delphinium californicum subsp. interius H. L. Mason 1928-5-6 4574 Alameda six mi from Livermore; Arroyo Mocho Comment
  UC635339  Delphinium cardinale H. L. Mason 1927-6-15 3788 Los Angeles wash of the San Gabriel River Comment
  CAS-BOT-BC8775  Delphinium gracilentum Herbert L. Mason 1926-4-11 2827 Alameda Cedar Mountain and Rancho Repose, Mount Hamilton Range Comment
  UC665672  Delphinium gypsophilum subsp. gypsophilum Herbert Mason 1940-5-4 12255 Merced 2 mi ne Ortigalita Peak; Ortigalita Canyon 304 Comment
  RSA28579  Delphinium gypsophilum subsp. gypsophilum H. L. Mason 1940-5-4 12255 Merced Ortigalita Canyon, 2 miles NE of Ortigalita Peak. 305 Comment
  UC912675  Delphinium hansenii H. L. Mason 1923-7-21 632 Tuolumne Hetch Hetchy Sierra Nevada Mountains 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
  CAS-BOT-BC10282  Delphinium hesperium Herbert L. Mason 1931-7-14 s.n. San Mateo Pescadero Creek, La Honda road Comment
  UC912567  Delphinium hesperium subsp. pallescens H. L. Mason 1928-4-29 4423 Contra Costa s slope of mt Mount Diablo, Sycamore Canyon Comment
  CAS-BOT-BC9900  Delphinium nudicaule Herbert L. Mason 1928-4-8 4287 Sonoma Two miles north of Fort Ross Comment
  UC635358  Delphinium nudicaule H. L. Mason 1926-6-6 3387 Santa Cruz Big Basin Comment
  UC635363  Delphinium nudicaule H. L. Mason 1931-3-13 5814 Alameda Lake Chabot Comment
  UC635342  Delphinium nuttallianum H. L. Mason 1929-5-9 5275 Mendocino wooded hillslopes and canyons 5 mi w Laytonville Comment
  UC912668  Delphinium parryi subsp. purpureum Herbert L. Mason 1926-4-26 2966 Los Angeles summit of 1st grade Mint Canyon Road Comment
  CAS-BOT-BC116453  Delphinium patens subsp. patens H. L. Mason 1929-3-29 5136 Contra Costa Marsh Creek Road two miles above Clayton Comment
  UC1199833  Delphinium polycladon Herbert L. Mason 1937-7-24 14834 Tuolumne n Hetch Hetchy Dam; Sierra Nevada, Yosemite National Park, Beehive 2133 Comment
  UC635450  Dendromecon harfordii Herbert L. Mason 1925-9-25 4105 Santa Barbara along roadway through Buena Vista Canyon Santa Cruz Island Comment
Read comments
Apr 29 2014
  UC1083123  Dendromecon rigida Herbert L. Mason 1936-4-10 11055 Calaveras ridge between Sheep Ranch and Murphys Comment
  UC635446  Dendromecon rigida Herbert L. Mason 1925-4-12 1339 Marin Pipe line trail Mt. Tamalpais Comment
  UC965493  Deschampsia cespitosa subsp. cespitosa Herbert L. Mason 1952-8-16 14491 Nevada meadow opposite University of CA Trout Lab. University of CA Trout Lab. (Sage Hen Creek); Sierra Nevada, Sage Hen Creek 1981 Comment
  CAS-BOT-BC192600  Deschampsia cespitosa subsp. holciformis H. L. Mason 1921-5-28 s.n. San Mateo Pebble Beach near Pescadero Comment
  CAS-BOT-BC192612  Deschampsia cespitosa subsp. holciformis Herbert L. Mason 1946-7-4 12885 Sonoma Pitkin Marsh, between Santa Rosa and Forestville 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
  UC912580  Deschampsia danthonioides Herbert L. Mason 1928-5-3 4444 San Joaquin 4 mi. n. Clememts Comment
  UC965507  Deschampsia elongata Herbert L. Mason 1952-8-16 14468 Nevada meadow opposite U.C. Trout Lab. (Sage Hen Creek); Sierra Nevada, Sage Hen Creek 1981 Comment
  UC642887  Descurainia californica H. L. Mason 1936-7-31 11459 Mono e of Saddlebag Lake (Tioga Crest); Sierra Nevada, Tioga Pass Region 3413 Comment
  CAS-BOT-BC886  Dicentra chrysantha Herbert L. Mason 1921-6-21 s.n. Santa Clara Road from Alma to Mt. Umunhum, Sierra Azule Ridge Comment
  UC635452  Dicentra chrysantha H. L. Mason 1922-6-30 302 Tuolumne between Groveland and Mather (Hetch Hetchy Railroad tracks, above Oakland Recreation Camp); Sierra Nevada Mountains, Yosemite National Park 1066 Comment
  UC634899  Dicentra formosa Herbert L. Mason 1927-5-11 3734 Yuba near Bullards Bar; Yuba River Canyon 609 Comment
  UC1083121  Dicentra uniflora Herbert L. Mason 1936-7-27 11385 Tuolumne w of Tioga Pass (Gaylor Lakes); Sierra Nevada, Yosemite National Park 3200 Comment
  UC635232  Dichelostemma capitatum H. L. Mason 1925-1-18 1182 Marin San Rafael to Forbes Comment
  UC912550  Dieteria canescens var. shastensis H. L. Mason 1932-9-9 7179 Placer Truckee Junction Comment
  UC1100287  Digitaria sanguinalis Herbert L. Mason and S. Galen Smith 1948-7-28 8229 Fresno San Joaquin River at Firebaugh; San Joaquin River Comment
  SACT000973  Digitaria sanguinalis Herbert Mason, S. Smith 1948-7-28 Fresno Rooting at nodes. Comment
  CAS-BOT-BC152433  Diplacus aurantiacus H. L. Mason 1931-5-7 s.n. Monterey Rancho del Monte, Carmel River Comment
  UC673300  Dithyrea californica Herbert L. Mason 1926-4-27 3065 Los Angeles 30 mi w Victorville; Mohave Desert Comment
  CAS-BOT-BC126860  Dodecatheon alpinum Herbert L. Mason 1923-8-2 702 Tuolumne Upper Lake, headwaters of Unicorn Creek, Yosemite National Park Comment
  UC1178843  Dodecatheon alpinum H. L. Mason 1922-8-25 349 Tuolumne Dana Fork Tuolumne River Sierra Nevada Mountains, Yosemite National Park (Tuolumne Meadows) Comment
  UC1178845  Dodecatheon alpinum Herbert L. Mason 1925-8-11 2221 Tuolumne White Wolf Comment
  UC1191156  Dodecatheon alpinum H. L. Mason 1922-8-20 343 Tuolumne Morraine Flat Sierra Nevada Mountains, Yosemite National Park (n of Lambert's Dome, Tuolumne Meadows) Comment
  UC604432  Dodecatheon clevelandii subsp. insulare H. L. Mason 1938-5-7 11785 Santa Barbara nw Lompoc (Burton Mesa); nw of Lompoc, Burton Mesa Comment
  JEPS27137  Dodecatheon clevelandii subsp. patulum Herbert L. Mason 1925-3-1 1261 San Francisco Bernal Heights San Francisco, Bernal Heights Comment
  UC571007  Dodecatheon clevelandii subsp. patulum Herbert L. Mason 1927-2-28 3651 Sacramento Folsom Comment
  UC1179001  Dodecatheon clevelandii subsp. patulum Herbert L. Mason 1925-3-7 1282 Alameda Niles Canyon , Niles Canyon (Sunol) Comment
  UC1191692  Dodecatheon hendersonii Herbert L. Mason 1936-3-14 10971 Calaveras on road between San Andreas and Mokelumne Hill; between San Andreas and Mokelumne Hill Comment
  UC1199856  Dodecatheon hendersonii Herbert L. Mason 1926-3-22 2792 Sonoma near Napa-Sonoma line (near Petrified Forest); near Petrified Forest Comment
  UC673387  Dodecatheon hendersonii Herbert L. Mason 1938-4-17 11740 Mariposa 8 mi e Hornitos; Sierra Nevada, e of Hornitos Comment
  UC673401  Dodecatheon hendersonii Herbert L. Mason 1929-3-15 5047 Contra Costa s Nortonville; s of Nortonville Comment
  UC1178842  Dodecatheon hendersonii Herbert L. Mason 1926-3-14 2717 Napa sw slope Mt. St. Helena Comment
  UC1039577  Dodecatheon jeffreyi H. L. Mason 1922-8-25 350 Tuolumne Tuolumne Meadows Sierra Nevada Mountains, Yosemite National Park (Yosemite National Park) Comment
  UC1199854  Dodecatheon jeffreyi H. L. Mason 1923-7-25 648 Tuolumne Hog Ranch Sierra Nevada Mountains, Yosemite National Park (Mather) Comment
  UC673493  Dodecatheon jeffreyi H. L. Mason 1922-7-25 327 Mariposa 1 1/2 mi w Porcupine Flat; Sierra Nevada Mountains, Yosemite National Park 2133 Comment
  GH424219  Dodecatheon subalpinum H. L. Mason 1928-7-3 4867 Unknown Yosemite Creek drainage, Tioga Road, head of Yosemite Creek grace, 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
  POM312372  Downingia bicornuta H. L. Mason, Verne Grant 1947-7-12 13412 Modoc West side of Pit River Valley S of Alturas. Comment
  UC1101474  Downingia bicornuta var. bicornuta Herbert L. Mason 1945-6-29 12619 Lake Boggs Lake at base of Mount Hanna Mount Hanna, Boggs Lake Comment
  POM312375  Downingia insignis H. L. Mason 1953-4-5 14506 Colusa 3 miles east of Maxwell Comment
  RSA114055  Downingia insignis H. L. Mason 1952-4-14 14267 Contra Costa 3.5 miles S of Byron Comment
  JEPS21908  Downingia laeta Herbert L. Mason and Verne Grant 1947-7-11 13369 Modoc s of Alturas (by Jones Lane, off Highway 395) Comment
  UC1101476  Downingia laeta Herbert L. Mason and Verne Grant 1947-7-11 13369 Modoc s of Alturas (by Jones Lane, off Highway 395) Comment
  UC635711  Downingia montana H. L. Mason 1923-7-24 641 Tuolumne Hog Ranch, Mather Sierra Nevada Mountains, Yosemite National Park, Mather 1432 Comment
  UC673418  Draba albertina Herbert L. Mason 1926-5-30 3328 Alpine Kit Carson Pass 2621 Comment
  UC1199843  Draba cuneifolia Herbert L. Mason 1935-3-29 8224 San Bernardino w Searles Lake (Poison Canyon); Mojave Desert, , w of Searles Lake Comment
  UC1025288  Draba oligosperma var. oligosperma Herbert L. Mason 1936-7-28 11406 Mono Dana Plateau Mono National Forest, Dana Plateau Comment
  UC1056992  Drosera rotundifolia Herbert L. Mason and L. W. Reinecke 1957-7-22 11578 Tuolumne just s Miguel Meadows (in hills just w of Hetch Hetchy); Sierra Nevada, Yosemite National Park, Swamp Lake 1584 Comment
  UC1106325  Drosera rotundifolia Herbert L. Mason, B. Fuller and H. Whisler 1958-7-13 23 Nevada 1 mi w University of California Trout Laboratory (12 mi n of Truckee); Sierra Nevada, Sage Hen Creek 1981 Comment
  UC1111566  Drosera rotundifolia Herbert L. Mason 1938-8-1 12065 Tuolumne Tiltill Valley Sierra Nevada, Yosemite National Park (sphagnum bog above meadow, Rancheria Mountain Trail) 1676 Comment
  UC673312  Drymocallis lactea var. lactea Herbert L. Mason 1923-8-21 752 Tuolumne n base of Lembert's Dome Sierra Nevada, Yosemite National Park, Tuolumne Meadows (Tuolumne Meadows, Yosemite National Park) Comment
  UC673475  Drymocallis lactea var. lactea Herbert L. Mason 1923-8-9 738 Tuolumne Gaylor Lakes, ridge w third lake; Sierra Nevada, Yosemite National Park, Gaylor Lakes Comment
  UC571158  Dudleya lanceolata H. L. Mason 1923-6-15 384 Santa Barbara Harris Grade Comment
  YM-YOSE65566  Dulichium arundinaceum H. L. Mason 1938-7-10 11920 Tuolumne SWAMP LAKE RESEARCH RESERVE. SOUTH ISLAND. SWAMP LAKE Comment
  GH387213  Eastwoodia elegans H. L. Mason 1941-7-3 12490 Unknown head of Cuyama Valley, fourteen miles west of Maricopa 762 Comment
Read comments
Apr 29 2014
  UC1100138  Echinodorus berteroi Herbert L. Mason and Verne Grant 1946-8-7 12989 Butte Gridley rd. n. of Butte Sink Comment
  UC1100139  Echinodorus berteroi Herbert L. Mason and Verne Grant 1946-9-4 13107 Butte 833 Canal, W. Gridley Rd. Comment
  POM312496  Eclipta alba H. L. Mason 1945-9-19 12725 Colusa Below caus[e]way over Butte Sink spillway, East bank of Sacramento River, 1 mile north of Colusa. Comment
  UC1100124  Egeria densa Herbert L. Mason and S. Galen Smith 1948-7-29 8241 Merced 5 mi e Los Banos (Turner Island Road) Comment
  CAS-BOT-BC451501  Egeria densa H. L. Mason 1938-8-26 12075 San Joaquin Trapper Slough, Robert's Island, southwest of Holt Comment
  SBBG45002  Egeria densa H. L. Mason 1938-8-26 12075 San Joaquin Trapper Slough, Robert's Island, SW of Holt Comment
  SEINET12902603 Image available Egeria densa H. L. Mason 1938-1 12075 Unknown Comment
  UC1101555  Elatine ambigua Herbert L. Mason and Verne Grant 1946-8-15 13052 Butte near caretaker's house (833 Irrigation Ditch); Butte Sink, Greylodge Game Refuge Comment
  UC1101557  Elatine ambigua Herbert L. Mason 1946-8-15 13051 Butte near caretaker's house (#833 Irrigation Ditch); Butte Sink, Greylodge Game Refuge Comment
  UC1101551  Elatine brachysperma Herbert L. Mason 1923-7-15 608 Tuolumne 2 mi w Mather (Salt Log Meadow) Comment
  UC1112286  Elatine chilensis Herbert L. Mason 1952-8-17 14494 Sierra 0.4 mi s Little Truckee River Bridge; Sierra Nevada; S of Little Truckee River Bridge, Sierra Co. 1920 Comment
  GH67222  Elatine gracilis H. L. Mason 1952-8-17 14494 Unknown 0.4 mile south of Little Truckee River bridge, 6300 feet Comment
  UC1101552  Elatine heterandra Herbert L. Mason 1945-6-29 12625 Lake Boggs Lake base of Mt, Hanna Comment
  UC1112284  Elatine heterandra Herbert L. Mason 1952-7-19 14450 Sierra pond 1.5 mi e Calpine (at junction of Calpine with Sierraville-Beckwourth rd); Sierra Valley; E of Calpine at junction of Calpine w/ Sierraville-Beckwourth road, Sierra Valley, Sierra Co. 1524 Comment
  UC985952 Image available Elatine heterandra Herbert L. Mason 1952-7-19 14450 Sierra 1.5 mi e Calpine (at junction of Calpine with Sierraville-Beckwourth road); Sierra Nevada, Sierra Valley; near Calpine, Sierra Valley 1524 Comment
  RSA312321  Elatine heterandra H. L. Mason 1953-6-8 14547 Lake Snows Lake. Comment
  JEPS45765  Elatine triandra Herbert L. Mason 1923-7-15 608 Tuolumne 2 mi w Mather (Slat Log meadow) Comment
  UC1101536  Elatine triandra Herbert L. Mason 1933-9-2 7257 Amador Silver Lake Sierra Nevada Comment
  UC1101534  Elatine triandra Herbert L. Mason 1947-8-8 13472 Modoc nw Alturas (sw margin of Big Sage Reservior) Comment
  CAS-BOT-BC113637  Eleocharis acicularis Herbert L. Mason; Verne Grant 1945-7-19 12635 Butte Marshes along Butte Creek, north of Marysville Buttes, Grey Lodge Game Refuge. Comment
  UC1100626  Eleocharis acicularis Herbert L. Mason and Verne Grant 1947-7-12 13402 Modoc irrigation ditch by Jone's Lane (off Hwy 395, several mi s of Alturas) Comment
  POM313052  Eleocharis acicularis var. acicularis H. L. Mason 1947-8-12 13512 Modoc Junction of North and South forks of Pit River, Alturas. Comment
  POM313057  Eleocharis acicularis var. acicularis H. L. Mason, Verne Grant 1945-7-19 12635 Butte Marshes along Butte Creek, north of Marysville Buttes, Grey Lodge Game Refuge, Butte Sink Comment
  CAS-BOT-BC113543  Eleocharis bella Herbert L. Mason 1940-7-6 12313 Tuolumne Miguel Meadows; west of Hetch Hetchy. 1584 Comment
  YM-YOSE65580  Eleocharis bella H. L. Mason 1938-7-11 11930 Tuolumne SWAMP LAKE RESEARCH RESERVE. MIGUEL MEADOWS Comment
  UC1100606  Eleocharis coloradoensis Herbert L. Mason 1947-8-12 13512 Modoc junction of North and South forks of Pit River, Alturas Comment
  CAS-BOT-BC113399  Eleocharis engelmannii Herbert L. Mason 1940-7-6 12314 Tuolumne Miguel Meadows, west of Hetch Hetchy, Yosemite National Park 1584 Comment
  CAS-BOT-BC113407  Eleocharis flavescens var. flavescens Herbert L. Mason; Stanley Galen [S. Galen] Smith 1948-8-19 8376 Merced San Joaquin River, bridge below Snelling. Comment
  UC1100588  Eleocharis flavescens var. flavescens Herbert L. Mason, S. Galen Smith 1948-1 8376 Merced bridge below Snelling (San Joaquin River) Comment
  POM313062  Eleocharis parishii H. L. Mason 1948-9-2 13628 Kern Walker Pass Comment
  UC1100706  Eleocharis parishii Herbert L. Mason 1948-9-2 13628 Kern Walker Pass Comment
  UC1108824  Elymus elymoides subsp. elymoides Herbert L. Mason 1938-7-22 11984 Tuolumne Moraine Ridge Sierra Nevada, Yosemite National Park (nw of Lake Vernon) 2286 Comment
  UC672376  Emmenanthe penduliflora Herbert L. Mason 1928-4-22 4434 Contra Costa Sycamore Canyon, south slope of Mount Diablo Comment
  UC1039627  Emmenanthe rosea Herbert L. Mason 1935-5-9 8309 Stanislaus Red Mountains, Arroyo del Puerto, Mount Hamilton Range Comment
  UC1093894  Ephedra californica Herbert L. Mason 1940-3-22 12245 Inyo Titus Canyon Death Valley National Monument, Grapevine Mountains, Titus C (on rocky benches along stream course) Comment
  UC1076386  Ephedra nevadensis H. L. Mason 1930-4-20 5593 Los Angeles hills in Rock Creek region Mohave Desert, Rock Creek Comment
  UC1093647  Ephedra trifurca Herbert L. Mason 1957-3-31 14682 Imperial near Yuma (desrt w of the sand hills) Comment
  UC1199841  Ephedra viridis Herbert L. Mason 1935-5-2 8383 Kern Piute Piute (s of Sequoia National Forest) Comment
  UC1191733  Epilobium brachycarpum Herbert L. Mason and Verne Grant 1947-7-10 13337 Modoc 2 mi e Alturas; Dorris Reservoir Comment
  UC1191616  Epilobium campestre Herbert L. Mason and Verne Grant 1947-7-10 13329 Modoc 2 miles e Alturas; Dorris Reservoir Comment
  UCD105939  Epilobium campestre Herbert L. Mason; S. Galen Smith 1948-8-9 8295 Santa Clara Pacheco Pass, just W of summit. Comment
  UC634654  Epilobium canum subsp. canum H. L. Mason 1927-10-4 4123 Santa Cruz mouth of Waddell Creek Ano Nuevo Point Comment
  UC634752  Epilobium canum subsp. canum Herbert L. Mason 1923-11-12 852 Contra Costa lower slopes Mt. Diablo Comment
  UC1191716  Epilobium ciliatum subsp. ciliatum Herbert L. Mason 1947-8-13 13522 Modoc ne side F Reservoir (n of Canby) Comment
  UC1191735  Epilobium ciliatum subsp. ciliatum Herbert L. Mason and Verne Grant 1947-7-12 13390 Modoc irrigation ditch by Jones' Lane (off Hwy 395, several mi s of Alturas) Comment
  UC1191745  Epilobium ciliatum subsp. ciliatum Herbert L. Mason 1948-9-4 13656 Mono Rush Creek Mono Lake Comment
  UC965552  Epilobium densiflorum Herbert L. Mason 1952-7-17 14380 Plumas along Western Pacific tracks just s Beckwourth; Sierra Valley 1524 Comment
  JEPS22801  Epilobium nivium Herbert L. Mason 1936-9-20 11533 Lake sw slope Snow Mountain 1828 Comment
  UC552450  Epilobium nivium Herbert L. Mason 1936-9-20 11533 Lake sw slopes Snow Mountain 1828 Comment
  CAS-BOT-BC190929  Epilobium pallidum Herbert Louis Mason; Verne Grant 1947-7-13 13441 Modoc Joseph Creek on Hwy 395. Comment
  UC1076343  Equisetum X ferrissii Herbert L. Mason 1930-10-25 5744 Monterey headwaters of Arroyo Seco; Santa Lucia Mts. 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
  UC1192372  Equisetum laevigatum Herbert L. Mason 1953-7-7 14557 Sierra ditch n of Sattley; Sierra Valley Comment
  UCD135508  Equisetum laevigatum Herbert L. Mason Date Unknown s.n. Sonoma Alexander Valley. Comment
  UC1076340  Equisetum telmateia subsp. braunii Herbert L. Mason 1932-4-28 7027 Santa Cruz Soquel Canyon; Santa Cruz Mts. Comment
  UC1254122  Equisetum telmateia subsp. braunii Herbert L. Mason 1962-5-5 Alameda 1190 Sterling Ave. Berkeley Comment
  CAS-BOT-BC213559  Eragrostis hypnoides Herbert L. Mason; S. Galen Smith 1948-8-18 8348 A Kings Along a canal just west of Stratford Comment
  CAS-BOT-BC213566  Eragrostis hypnoides Herbert Mason; S. Galen Smith 1948-7-29 8245 Merced Salt slough, at end of Turner Island Road, east of Los Banos. Comment
  CAS-BOT-BC213578  Eragrostis hypnoides Herbert L. Mason 1945-8-24 12678 Lake East shore, Lower Lake Comment
  UC1100244  Eragrostis hypnoides Herbert L. Mason and S. Galen Smith 1948-8-18 8348 A Kings along a canal just w Stratford Comment
  UCD63369  Eragrostis hypnoides Herbert L. Mason; S. Galen Smith 1948-8-18 8348 -A Kings Along a canal just west of Stratford. Comment
  UC634847  Eremalche exilis H. L. Mason 1932-4-2 6902 Kern 10 mi. e. Mojave Comment
  UCD116238  Eremalche parryi Stephen Mason 1995-5-8 58 San Luis Obispo San Luis Obispo County: Carrizo Plain Natural Area, N side of Panorama Rd., 0.7 mi. from Soda Lake Rd. 609 Comment
  UC634838  Eremalche parryi H. L. Mason 1930-3-30 5537 San Benito 14 mi. below Pinnacles; San Benito R. Canyon 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
  UC908776  Eriastrum abramsii Herbert L. Mason 1935-5-9 8313 Santa Clara divide between Colorado Creek and headwaters of Arroyo Mocho 838 Comment
  UC909055  Eriastrum abramsii Herbert L. Mason 1945-5-12 12585 Lake ridge between Burns Valley and Borax Lake Comment
  SEINET4407887 Image available Eriastrum brandegeeae H. L. Mason 1945-1 12604 Lake Comment
  SEINET8729305 Image available Eriastrum brandegeeae H. L. Mason 1945-1 12604 Lake Obsidian Ridge, southeast of Borax Lake. Comment
  UC1191633  Eriastrum densifolium subsp. austromontanum Herbert L. Mason 1948-9-3 13631 a Inyo Onion Valley Comment
  UC665612  Eriastrum densifolium subsp. densifolium Herbert L. Mason 1941-7-1 12466 San Luis Obispo mesa w Nipomo 106 Comment
  RSA0107372  Eriastrum densifolium subsp. densifolium H. L. Mason 1941-7-1 12466 San Luis Obispo Mesa west of Nipomo. 107 Comment
  CAS-BOT-BC514478  Eriastrum eremicum subsp. eremicum Herbert L. Mason 1926-4-27 3070 San Bernardino Near Victorville Comment
  SBBG29125  Eriastrum pluriflorum E. L. Mason 1938-7-16 11956 Madera 2 mi S of South Fork 822 Comment
  UC629726  Eriastrum pluriflorum H. L. Mason 1938-7-16 11956 Madera 2 mi s South Fork; Sierra Nevada 1127 Comment
  CAS-BOT-BC514831  Eriastrum pluriflorum subsp. pluriflorum H. L. Mason 1938-7-16 11956 Madera Sierra Nevada: 2 mi S of South Fork 1127 Comment
  CAS-BOT-BC514846  Eriastrum pluriflorum subsp. pluriflorum Herbert L. Mason 1941-7-3 12489 Santa Barbara Head of Cuyama Valley, 14 mi W of Maricopa 762 Comment
  RSA0120842  Eriastrum pluriflorum subsp. pluriflorum H. L. Mason 1938-7-16 11956 Madera Two miles south of South Fork, Sierra Nevada. 1128 Comment
  UC909058  Eriastrum sapphirinum Herbert L. Mason 1948-6-15 3787 Los Angeles cirque slide s Baldy; San Antonio Wash 2194 Comment
  UC1093967  Ericameria ericoides Herbert L. Mason 1930-9-1 5909 Monterey hills at upper end Elkhorn Slough (between Watsonville and Castroville) Comment
  UC1540464  Ericameria ericoides Herbert L. Mason 1936-9-13 11525 Monterey nine mi n Salinas; Prunedale Comment
  UC581132  Ericameria linearifolia H. L. Mason 1934-3-28 8010 Kern 4 mi e Onyx; Kern River Canyon Comment
  UC672315  Ericameria linearifolia H. L. Mason 1930-4-20 5596 Los Angeles hills in the Rock Creek region Mohave Desert, Rock Creek Comment
  UC672316  Ericameria linearifolia H. L. Mason 1926-4-27 3040 Los Angeles Rock Creek Comment
  UC912295  Erigeron biolettii Herbert L. Mason 1928-7-14 4908 Humboldt near Garberville; East Fork Eel River Comment
  CAS-BOT-BC294817  Erigeron breweri var. breweri Herbert L. Mason 1938-7-22 11977 Tuolumne Sierra Nevada, Yosemite National Park. Beehive, north of Hetch Hetchy Dam 1981 Comment
  UC1179074  Erigeron breweri var. breweri Herbert L. Mason 1938-7-22 11977 Tuolumne n of Hetch Hetchy Dam (Beehive); Sierra Nevada, Yosemite National Park, Beehive Comment
  UC712477  Erigeron breweri var. breweri Herbert L. Mason 1936-8-1 11490 Mono Leevining Canyon Sierra Nevada, Leevining Canyon Comment
  UC714412  Erigeron compositus Herbert L. Mason 1936-7-26 11382 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
  POM199571  Erigeron foliosus var. hartwegii H. L. Mason 1932-4-24 s.n. Amador Dry Creek Bridge between Ione and Latrobe 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
  UC1192213  Erigeron pumilus var. intermedius Herbert L. Mason 1948-7-18 13609 Siskiyou Grass Lake Comment
  UC712506  Erigeron pygmaeus H. L. Mason 1936-7-24 11346 Tuolumne White Mountain Sierra Nevada, Mount Conness Range, White Mountain 3505 Comment
  UC712511  Erigeron pygmaeus H. L. Mason 1936-7-23 11284 Tuolumne Mount Conness Sierra Nevada, Mount Conness 3505 Comment
  UC672375  Eriodictyon californicum Herbert L. Mason 1925-6-27 2124 Tuolumne Mather , Mather (Hog Ranch) Comment
  CAS-BOT-BC189059  Eriodictyon capitatum Herbert L. Mason 1947-5-2 13208 Santa Barbara Pine Canyon, Purissima Hills Comment
  SEINET8731330  Eriodictyon capitatum Herbert L. Mason 1947-1 Santa Barbara Comment
  CAS-BOT-BC248527  Eriogonum angulosum H. L. Mason 1930-4-20 s.n. San Benito 14 miles south of Hollister Comment
  POM204282  Eriogonum argillosum H. L. Mason 1930-3-30 5533 San Benito Canyon of the San Benito river, 14 miles south of Hollister Comment
Read comments
Jan 15 2020
  CAS-BOT-BC248837  Eriogonum compositum var. compositum H. L. Mason 1931-5-9 5865 Siskiyou Shasta Creek Comment
  UC635010  Eriogonum compositum var. compositum H. L. Mason 1931-5-9 5865 Siskiyou Shasta Creek Comment
  UC635002  Eriogonum elegans H. L. Mason 1930-10-25 5777 Monterey between Jolon and Santa Lucia Ranger Station (foothills of Santa Lucia Mountains); Santa Lucia Mountains Comment
  UC634605  Eriogonum elongatum var. elongatum H. L. Mason September 1930 5911 Monterey between Watsonville and Castroville (low hills at upper end of Elkhorn Slough); Elkhorn Slough 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
  UC1076551  Eriogonum gracile Herbert L. Mason 1936-9-13 11530 Santa Clara w Madrone Station Comment
  UC912608  Eriogonum gracillimum Herbert L. Mason 1923-1-14 373 Monterey near bridge over Salinas River; King City, Salinas River Comment
  UC1081558  Eriogonum incanum Herbert L. Mason 1936-7-29 11433 Mono cirque below Conness Glacier (w of Saddlebag Lake); Sierra Nevada, Yosemite National Park 3200 Comment
  UC635000  Eriogonum inflatum var. inflatum H. L. Mason 1928-3-10 4230 Riverside Hidden Springs Canyon Coachella Mountains, Hidden Springs Canyon Comment
  CAS-BOT-BC265985  Eriogonum latifolium H. L. Mason 1929-9-1 5414 Mendocino Three miles north of Fort Bragg Comment
  UC634997  Eriogonum latifolium Herbert L. Mason 1927-10-4 4125 Santa Cruz mouth of Waddell Creek Ano Nuevo Pt., Waddell Creek Comment
  UC635012  Eriogonum latifolium H. L. Mason 1932-8-27 7169 Mendocino Point Arena Comment
  UC1093645  Eriogonum luteolum var. luteolum Herbert L. Mason 1946-7-4 12899 Sonoma 2 mi e Occidental Comment
  CAS-BOT-BC263158  Eriogonum maculatum H. L. Mason 1926-4-28 3080 San Bernardino Box S Springs, Mohave [Mojave] Desert Comment
  UC1081576  Eriogonum nudum var. scapigerum Herbert L. Mason 1936-7-29 11431 Mono w Saddlebag Lake (cirque below Conness Glacier) 3200 Comment
  UC641993  Eriogonum ovalifolium var. nivale H. L. Mason 1936-7-23 11285 Tuolumne alpine slopes of Mount Conness Sierra Nevada, Mount Conness Comment
  UC634526  Eriogonum parvifolium H. L. Mason 1923-6-15 394 Santa Barbara Harris Grade between Harris and Lompoc; Harris Grade Comment
  UC635807  Eriogonum pusillum Herbert L. Mason 1926-4-26 3012 Los Angeles near Rock Creek; Mohave Desert Comment
  CAS-BOT-BC258294  Eriogonum reniforme H. L. Mason 1926-4-28 3097 San Bernardino Box S Ranch, Mojave Desert Comment
  POM257236  Eriogonum spergulinum H. L. Mason 1928-7-4 4871 Tuolumne Common on granite soil flats near streams; Tuolumne Meadows. Comment
  UC634528  Eriogonum spergulinum var. reddingianum Herbert L. Mason 1924-6-20 1080 Plumas between Gold Lake and Bear Lake Comment
  CAS-BOT-BC271958  Eriogonum spergulinum var. spergulinum H. L. Mason 1928-7-4 4871 Tuolumne Tuolumne Meadows Comment
  UC912475  Eriogonum umbellatum var. furcosum Herbert L. Mason 1933-9-2 7255 Amador Silver Lake Sierra Nevada, Silver Lake Comment
  UC635516  Eriogonum ursinum Herbert L. Mason 1924-6-18 1055 Plumas near summit of road between Graeagle and Gold Lake Comment
  UC965635  Eriogonum vimineum Herbert L. Mason 1952-7-17 14379 Plumas 3 mi from Loyalton (on road to Beckwourth); Sierra Nevada, Sierra Valley 1524 Comment
  UC632749  Eriophorum crinigerum H. L. Mason 1936-7-22 11263 Tuolumne w. spur Ragged Peaks (n. of Tuolumne Meadows, Yosemite Nat'l Park); Yosemite Nat'l Park 3200 Comment
  UC566764  Eriophyllum confertiflorum var. confertiflorum H. L. Mason 1923-6-15 392 Santa Barbara Harris grade Comment
  CAS-BOT-BC300928  Eriophyllum jepsonii Herbert L. Mason 1935-5-8 10008 Stanislaus Patterson Road, twenty miles from mouth of Arroyo del Puerto, Mount Hamilton Range 533 Comment
  UC545808  Eriophyllum jepsonii Herbert L. Mason 1935-5-8 10008 Stanislaus Patterson Road twenty mi from mouth Arroyo del Puerto; Mount Hamilton Range 533 Comment
  GH427109  Eriophyllum lanatum H. L. Mason 1925-12-31 2567 Unknown Bartlet Mountain Road Comment
  CAS-BOT-BC301146  Eriophyllum lanatum var. achilleoides H. L. Mason 1934-4-28 8075 Sonoma Head of Dohrman Creek, Jensen's Ranch, four miles west of Healdsburg Comment
  UC566758  Eriophyllum lanatum var. achilleoides H. L. Mason 1925-12-31 2567 Lake Bartlet Mountain Road Comment
  UC632732  Eriophyllum lanatum var. achilleoides H. L. Mason 1934-4-28 8075 Sonoma 4 mi w Healdsburg (Jensen's Ranch); Head of Dohrman Creek Comment
  UC912251  Eriophyllum lanatum var. arachnoideum Herbert L. Mason 1934-4-28 8096 Sonoma Dohrman Creek Comment
  UC632839  Eriophyllum lanatum var. integrifolium H. L. Mason 1936-7-9 11168 Mariposa ridge forming boundary between Tuolumne County and Mariposa County (s of White Wolf); Yosemite National Park 2529 Comment
  CAS-BOT-BC301803  Eriophyllum multicaule H. L. Mason 1932-4-3 6921 San Benito Divide between Lewis Creek and San Benito River on Priest Valley Road to Hollister Comment
  UC566751  Eriophyllum wallacei H. L. Mason 1926-4-26 3019 Los Angeles Little Rock Comment
  UC571140  Erodium cicutarium Herbert L. Mason 1928-3-20 3663 Alameda Livermore Comment
  UC571139  Erodium macrophyllum H. L. Mason 1929-3-15 5060 Contra Costa about 5 mi from Brentwood (Marsh Creek Road) Comment
  UC1191957  Eryngium alismifolium Herbert L. Mason 1947-8-12 13511 Modoc Alturas, junction of N. and S. Forks of Pit River Comment
  UC985673  Eryngium aristulatum var. aristulatum Herbert L. Mason 1945-8-24 12671 Lake Boggs Lake Comment
  UCD127480  Eryngium articulatum Herbert L. Mason; Verne Grant 1946-9-4 13103 Butte Colusa Gun Club. Comment
  CAS-BOT-BC54303  Erysimum capitatum H. L. Mason 1926-3-14 2725 Napa Mount Saint Helena. Comment
  UC1081568  Erysimum capitatum Herbert L. Mason 1936-4-11 11060 Calaveras s Sheep Ranch; San Antonio Creek Comment
  UC673521  Erysimum capitatum Herbert L. Mason 1932-3-19 6826 San Joaquin two mi e Midway 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
  UC642870  Erysimum perenne H. L. Mason 1937-7-29 11437 Mono near Saddlebag Lake; Sierra Nevada, Conness Cirque 3200 Comment
  JEPS19685  Erythranthe grayi Herbert L. Mason 1938-7-14 11953 Madera 2 mi n Yosemite Forks (on Calif. Highway No. 41, 4 mi s of Miami (now Westfall) Ranger Station); Sierra National Forest Comment
  UC672119  Erythronium californicum Herbert L. Mason 1929-5-9 5269 Mendocino hill slopes and canyons five mi w Laytonville Comment
  UC635480  Eschscholzia californica H. L. Mason 1924-11-15 1157 Marin Willow Camp Bolinas Bay Comment
  CAS-BOT-BC403199  Eschscholzia californica H. L. Mason 1924-11-15 1157 Marin In vacant lots at Willow Camp, Bolinas Bay Comment
  CAS-BOT-BC403544  Eschscholzia californica H. L. Mason 1922-4-1 s.n. San Mateo At Pigeon Point Light Comment
  CAS-BOT-BC403545  Eschscholzia californica H. L. Mason 1922-3-26 s.n. San Mateo Mouth of Gazos Creek Comment
  UC1051462  Eschscholzia glyptosperma Herbert L. Mason 1952-4-9 14233 San Bernardino ten mi s Needles Comment
  CAS-BOT-BC76393  Eschscholzia hypecoides H. L. Mason 1930-3-30 5530 San Benito San Benito River Canyon, 14 miles below the Pinnacles. Comment
  UC635607  Eschscholzia lobbii H. L. Mason 1926-3-27 2799 Napa road between Gordon Valley and Wooden Valley Comment
  UC912329  Eucephalus breweri Herbert L. Mason 1933-9-2 7257 Amador Silver Lake Sierra Nevada Mountains Comment
  UC673635  Euchiton sphaericus H. L. Mason 1930-8-1 5732 Lake road to Bartlett Mountain Comment
  UC635175  Eucrypta chrysanthemifolia var. bipinnatifida H. L. Mason 1935-3-28 8186 San Bernardino near Stoddard Wells (Mohave Desert); Mohave Desert Comment
  RSA116765  Euonymus occidentalis H. L. Mason 1921-1 s.n. San Mateo San Francisquito Creek near Searsville Lake. Comment
  UCD142537  Euphorbia albomarginata Steve Mason 1993-5-2 30 Los Angeles Mojave Desert, off CA Hwy. 138, 1.0 mi. past W 110th St. on dirt road 0.4 mi. from jct. 762 Comment
  UC1051461  Euphorbia eriantha Herbert L. Mason 1952-4-9 14232 San Bernardino 10 mi S of Needles Comment
  GH347531  Euphorbia misera H. L. Mason 1925-4-18 1496 Unknown redacted by HUH Comment
  CAS-BOT-BC95712  Euphorbia serpillifolia Herbert Louis Mason; Verne Grant 1947-7-10 13325 Modoc Dorris Reservoir. Comment
  UC570794  Euphorbia spathulata H. L. Mason 1932-4-17 6942 Santa Clara 1 mi e New Almaden (hill) Comment
  UC672225  Euthamia occidentalis Herbert L. Mason 1924-10-19 1125 San Francisco in sand hills San Francisco, Merced Lake Comment
  RSA114057  Filago depressa H. L. Mason 1952-4-11 14252 San Bernardino Black Lava Bed just east of Dagget. Comment
  RSA93678  Filago gallica H. L. Mason 1928-4-26 4386 Contra Costa Berekeley-Oakland Hills Comment
  UC566905  Forestiera pubescens H. L. Mason 1926-4-28 3092 San Bernardino Box S Spring Comment
  UC566906  Forestiera pubescens H. L. Mason 1923-6-14 369 Monterey King City bridge over Salinas River; King City, Salinas River Comment
  CAS-BOT-BC456089  Fragaria vesca subsp. californica H. L. Mason 1917-4-6 82 Alameda Berkeley Hills Comment
  GH425837  Frangula californica H. L. Mason 1930-10-25 5742 Unknown Headwaters of the Arroyo Seco, Santa Lucia Mountains Comment
  GH425973  Frangula californica subsp. occidentalis H. L. Mason 1932-7-21 7109 Unknown East slope of Southfork Mountains, on road from Arcata to Weaverville Comment
  SBBG26893  Fremontodendron californicum H. L. Mason 1935-5-30 10009 Napa 4 mi N of Knoxville Mines Comment
  CAS-BOT-BC130031  Fritillaria affinis H. L. Mason 1917-4-28 s.n. Marin Mt. Tamalpais Comment
  UC672109  Fritillaria affinis Herbert L. Mason 1926-3-14 2728 Lake Mount St. Helena Comment
  UC672103  Fritillaria affinis Herbert L. Mason 1930-3-9 5519 Marin Point Reyes Comment
  UC672114  Fritillaria atropurpurea Herbert L. Mason 1928-7-5 4872 Tuolumne Yosemite National Park, Tioga Pass Tioga Pass; Sierra Nevada, Yosemite National Park, Tioga Pass Comment
  UC1179069  Fritillaria pluriflora Herbert L. Mason 1947-3-30 13165 Colusa 0.5 mi e of Lake County Line (on Williams-Lower Lake Highway, western Colusa County); Williams-Lower Lake Highway Comment
  GH357429  Fritillaria purdyi H. L. Mason 1941-3-16 12385 Unknown Serpentine ridge, three miles east of Middletown, inner North Coast Range, Lake County Comment
  UC965577  Galium bifolium Herbert L. Mason 1952-7-18 14397 Nevada upstream University of California Trout Laboratory; Sierra Nevada, Sagehen Creek 1981 Comment
  UC632797  Galium bolanderi H. L. Mason 1936-7-15 11253 Tuolumne 1/2 mi w Mather (margin of pool) 1371 Comment
  UC964759  Galium murale Herbert L. Mason 1944-3-17 Contra Costa Briones Hills Comment
  UC965567  Galium trifidum Herbert L. Mason 1952-7-16 14344 Nevada adjacent to stream which arises from large spring in meadow one mile west of UC Trout Laboratory; Sierra Nevada, Sage Hen Creek 1981 Comment
  UC1039526  Galium trifidum var. pacificum Herbert L. Mason 1938-7-10 11907 Tuolumne South Island Yosemite National Park, Swamp Lake Comment
  UC1102976  Galium trifidum var. pusillum Herbert L. Mason 1958-8-9 14879 Tuolumne w Hetch Hetchy Dam; Sierra Nevada, Yosemite National Park< Swamp Lake area 1584 Comment
  UC672198  Gamochaeta ustulata H. L. Mason 1928-4-12 4302 Contra Costa Richmond waterfront Comment
  UC634815  Garrya elliptica H. L. Mason Nov 1931 5884 Monterey road between Monterey and Carmel Comment
  UC634816  Garrya elliptica H. L. Mason 1925-9-12 2223 Contra Costa head of San Leandro Creek Canyon; Oakland Hills Comment
  CAS-BOT-BC186416  Garrya flavescens H. L. Mason 1926-5-1 3160 San Diego Palomar Mountain Comment
  UC634792  Garrya flavescens H. L. Mason 1923-6-15 428 Santa Barbara between La Cumbre Peak and Santa Barbara; Rattlesnake Canyon Comment
  UC634831  Garrya flavescens H. L. Mason 1926-1-1 2601 Lake near lower Blue Lake Comment
  CAS-BOT-BC169864  Garrya fremontii H. L. Mason 1924-6-18 1053 Plumas Road between Graeagle and Gold Lake Comment
  UC1093912  Garrya fremontii Herbert L. Mason 1943-4-16 12567 Tuolumne 4 mi above Long Barn (on Highway 108); Bald Mountain Comment
  CAS-BOT-BC56282  Gaultheria humifusa Herbert L. Mason 1936-8-30 14820 Tuolumne Tilden Lake 2926 Comment
  CAS-BOT-BC56252  Gaultheria humifusa Herbert L. Mason 1941-7-14 12520 Madera Ottoway Lake 2987 Comment
  CAS-BOT-BC59639  Gaultheria shallon Herbert L. Mason 1920-6-25 s.n. San Mateo Pescadero Cr. Comment
  POM257252  Gayophytum humile H. L. Mason 1934-5-5 8118 Lake Southwest of Mt. Konocti Comment
  UC634693  Gayophytum humile H. L. Mason 1934-5-5 8118 Lake sw Mount Konocti Comment
  UC566947  Gentianopsis holopetala H. L. Mason 1923-8-21 750 Tuolumne n. base Puppy Dome (Dana Fork near Gaylor Creek); Sierra Nevada Mts., Yosemite Nat'l Park Comment
  GH400045  Gentianopsis holopetala H. L. Mason 1923-8-21 750 Unknown Yosemite National Park, North base of Puppy Dome. Dana Fork near Gaylor Creek Comment
  UC571133  Geranium californicum Herbert L. Mason 1923-7-2 2139 Tuolumne Mather 1432 Comment
  UC555622  Geum macrophyllum H. L. Mason 1923-8-6 712 Tuolumne Island of Lyell Fork Comment
  UC909020  Gilia achilleifolia subsp. achilleifolia Herbert L. Mason 1927-4-23 3677 San Mateo summit of road between La Honda and Pescadero Creek; summit of road between La Honda and Pescadero Creek Comment
  UC908903  Gilia achilleifolia subsp. multicaulis Herbert L. Mason 1926-4-11 2860 Alameda Cedar Mountain Comment
  UC908909  Gilia achilleifolia subsp. multicaulis Herbert L. Mason 1926-4-11 2822 Alameda Rancho Repose , Rancho Repose (Cedar Mt.) Comment
  UC908986  Gilia achilleifolia subsp. multicaulis Herbert L. Mason March 1935 Monterey Point Lobos State Park Comment
  UC908988  Gilia achilleifolia subsp. multicaulis Herbert L. Mason, Edward Lee March, 1935 9437 Monterey Point Lobos State Park Comment
  UC1186141  Gilia aliquanta Herbert L. Mason 1935-3-28 8183 San Bernardino Stoddard Wells; Mojave Desert Comment
  UC962140  Gilia aliquanta subsp. breviloba H. L. Mason 1934-3-24 8190 San Bernardino s Barstow (Taylor Springs n of Lucerne Valley); near Stoddard Wells, n of Lucerne Valley Comment
  POM282929  Gilia angelensis C. T. Mason 1943-3-28 125 San Bernardino Mentone Ranch, Mentone. Comment
  UC908355  Gilia angelensis Herbert L. Mason 1928-3-11 4255 Riverside San Gorgonio Pass Comment
  UC908846  Gilia cana subsp. bernardina Herbert L. Mason 1926-4-27 3076 San Bernardino se Lucerne Post Office (Box S Ranch, Mohave Desert); Mohave Desert, Box S Ranch Comment
  UC908845  Gilia cana subsp. speciformis Herbert L. Mason 1935-3-28 8188 San Bernardino s Barstow (Taylor Springs); Mohave Desert, , s of Barstow Comment
  UC908578  Gilia capillaris Herbert L. Mason 1924-6-20 1083 Plumas Gold Lake Comment
  UC908922  Gilia capitata subsp. abrotanifolia Herbert L. Mason 1926-5-2 3196 Riverside Temecula Valley 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
  UC971912  Gilia capitata subsp. capitata Herbert L. Mason 1950-7-15 14056 Trinity summit of grade Scott Mountain Scott Mountain Comment
  UC908933  Gilia capitata subsp. capitata Herbert L. Mason 1935-5-25 8313 a San Luis Obispo Cuyama River n Santa Maria; Cuyama River n of Santa Maria 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
  UC909064  Gilia capitata subsp. pedemontana Herbert L. Mason 1925-6-27 2116 Tuolumne edge of Hog Ranch Meadow , edge of Hog Ranch Meadow (Mather) Comment
  UC908108  Gilia capitata subsp. staminea Herbert L. Mason 1929-3-31 5159 Contra Costa Antioch; San Joaquin River Comment
  UC908985  Gilia clivorum Herbert L. Mason 1930-3-30 5532 San Benito 14 mi below Pinnacles (San Benito River Canyon); , below Pinnacles Comment
  UC909003  Gilia clivorum Herbert L. Mason 1934-4-8 8052 Contra Costa 11 mi s Marsh Creek Road (on road from Marsh Creek to Livermore); on rd from Marsh Creek to Livermore 609 Comment
  UC909004  Gilia clivorum Herbert L. Mason 1928-4-15 4358 Contra Costa top Moraga Ridge; top of Moraga Ridge Comment
  UC909033  Gilia clivorum Herbert L. Mason 1929-3-29 5128 Contra Costa 2 mi e Clayton (Marsh Creek Road); e of Clayton Comment
  UC908837  Gilia diegensis Herbert L. Mason 1926-5-1 3185 San Diego n side of Palomar Mountain , Oak Grove (Oak Grove) Comment
  UC908425  Gilia interior Herbert L. Mason 1934-3-28 8000 Kern Kern River Canyon Comment
  UC908426  Gilia interior Herbert L. Mason 1938-4-17 11732 Kern three and one-half mi e Hobo Hot Springs (Kern River Canyon); , e of Hobo Hot Springs Comment
  UC909034  Gilia interior Herbert L. Mason 1935-4-30 8278 Kern six mi e Onyx (Kern River drainage); , e of Onyx Comment
  HSC16974  Gilia latiflora H. L. Mason 1935-3-29 8204 Kern 2 mi. W of Randsburg, Mojave Desert Comment
  SD45383  Gilia latiflora Herbert L. Mason 1935-3-29 8204 Kern 2.0 miles west of Randsburg, 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
  UC908490  Gilia latiflora subsp. latiflora Herbert L. Mason 1934-3-30 8031 San Bernardino two mi se Barstow; Mohave Desert, Barstow Comment
  UC908821  Gilia latiflora subsp. latiflora Herbert L. Mason 1935-3-29 8195 San Bernardino twelve mi w Barstow (Mohave Desert); Mohave Desert Comment
  UC908828  Gilia latiflora subsp. latiflora Herbert L. Mason 1926-4-26 2998 Los Angeles Little Rock Creek Mohave Desert, Little Rock Creek Comment
  UC908135  Gilia latifolia Herbert L. Mason 1935-3-29 8287 San Bernardino w Searles Lake (Poison Canyon); Mohave Desert, , w of Searles Lake Comment
  UC908136  Gilia latifolia Herbert L. Mason 1935-3-29 8227 San Bernardino w Searles Lake (Poison Canyon); Mohave Desert, w of Searles Lake, Poison Canyon Comment
  UC1275782  Gilia lottiae Herbert L. Mason 1963-6-24 15219 Mono Paoha Island Mono Lake, Paoha Island Comment
  UC1275780  Gilia lottiae Herbert L. Mason 1963-7-4 15230 Mono n end of Mono Lake Comment
  UC908973  Gilia millefoliata Herbert L. Mason 1946-5-18 12775 Mendocino sand dunes 6 mi n Fort Bragg (in edge of small lake); n of Fort Bragg Comment
  UC908417  Gilia minor Herbert L. Mason 1935-3-29 8208 Kern two mi n Mohave (Mohave Desert); , n of Mohave Comment
  RSA67335  Gilia minor H. L. Mason 1949-4-25 14014 Ventura Cuyama Valley, on Ojai-Maricopa road at Ventura - Santa Barbara cos. line. Comment
  UC962103  Gilia ochroleuca subsp. bizonata H. L. Mason 1935-5-1 8360 Tulare Kern River n Kernville; Sequoia National Forest, Kern River Comment
  UC963805  Gilia ochroleuca subsp. bizonata Herbert L. Mason 1935-5-1 8358 Tulare n Kernville (Kern River, Sequoia National Forest); Sequoia National Forest, Kern River Comment
  UC908023  Gilia ochroleuca subsp. exilis Herbert L. Mason 1926-4-30 3112 Riverside 1 mi s Temecula; Temecula Canyon, s of Temecula Comment
  CAS-BOT-BC407850  Gilia ochroleuca subsp. ochroleuca Herbert L. Mason 1926-4-27 3044 a Los Angeles San Gabriel Mountains, Rock Creek 1219 Comment
  CAS-BOT-BC407838  Gilia ochroleuca subsp. ochroleuca Herbert L. Mason 1935-3-29 8215 San Bernardino Mohave Desert, 3 miles N of Johannesburg on road to Searles Lake Comment
  SD46103  Gilia scopulorum Herbert L. Mason 1952-4-11 14257 San Bernardino Black lavas north of Pisgah Crater. Comment
  HSC17017  Gilia sinuata H. L. Mason 1935-3-29 8203 Kern 2 mi. W of Randsburg, Mojave Desert Comment
  UC908892  Gilia sinuata Herbert L. Mason 1935-5-1 8356 Tulare n Kernville (Kern River, Sequoia National Forest); Sequoia National Forest, Kern River Comment
  CAS-BOT-BC123828  Gilia splendens subsp. australis Herbert Louis Mason 1926-5-2 3195 Riverside Temecula Valley Comment
  UC1051480  Gilia subacaulis Herbert L. Mason 1952-4-11 14256 San Bernardino Black lavas n Pisgah Crater; n of Pisgah Crater Comment
  CAS-BOT-BC226458  Gilia tenuiflora subsp. tenuiflora H. L. Mason 1921-5-7 s.n. Monterey Rancho del Monte Comment
  UC908571  Gilia tricolor subsp. diffusa Herbert L. Mason 1935-5-2 8375 Kern Havilah Kern River drainage, Havilah Comment
  UC908594  Gilia tricolor subsp. diffusa Herbert L. Mason 1928-5-4 4505 El Dorado four mi n Shingle Springs; n of Shingle Springs Comment
  UC908576  Gilia tricolor subsp. tricolor Herbert L. Mason 1929-3-29 5118 Contra Costa Mount Diablo 762 Comment
  UC963782  Gilia tricolor subsp. tricolor Herbert L. Mason 1929-3-23 5097 Madera hills e Madera; e of Madera Comment
  UC635646  Githopsis specularioides H. L. Mason 1932-4-24 6984 Amador 3 mi s Ione Comment
  UC1191378  Glinus lotoides Herbert L. Mason 1945-7-11 12641 Colusa 3 mi above Colusa (near Butte Creek, Butte Lodge Outing Club); Butte Lodge Outing Club 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-BC307366  Gnaphalium palustre H. L. Mason 1932-9-9 7175 Placer Cisco Comment
  UC581124  Gnaphalium palustre H. L. Mason 1933-5-29 7245 El Dorado Shingle Springs Comment
  UC912258  Gnaphalium palustre Herbert L. Mason 1933-9-2 7278 Amador Silver Lake Sierra Nevada, Silver lake 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
  UCD132417  Gnaphalium palustre Herbert L. Mason; Verne Grant 1947-7-12 13425 Modoc near south end of west side road, along railroad tracks, Pit River Valley, south of Alturas. Comment
  JEPS23181  Gratiola ebracteata Herbert L. Mason 1940-7-7 12330 Tuolumne w Hetch Hetchy Dam (Miguel Meadow, Yosemite National Park); Yosemite National Park, w of Hetch Hetchy Dam, Miguel Meadow 1584 Comment
  UC1178866  Gratiola ebracteata Herbert L. Mason 1940-7-7 12330 Tuolumne w Hetch Hetchy Dam (Miguel Meadow, Yosemite National Park); Yosemite National Park, w of Hetch Hetchy Dam, Miguel Meadow 1584 Comment
  CAS-BOT-BC26128  Gratiola heterosepala H. L. Mason; R. C. Bacigalupi 1953-6-8 14544 Lake on southwest margin of Boggs Lake, (west base of Mount Hanna) Comment
  UC985639  Gratiola heterosepala H. L. Mason and R. C. Bacigalupi 1953-6-8 14544 Lake w base Mount Hanna (sw margin of lake); Boggs Lake; Lake Co. Comment
  RSA0006023  Gratiola heterosepala H. L. Mason, R. C. Bacigalupi 1953-6-8 14544 Lake Southwest margin of Boggs Lake, (west base of Mount Hanna). Comment
  UC1191881  Gratiola neglecta Herbert L. Mason and Verne Grant 1947-7-11 13373 Modoc off Highway 395 s Alturas (irrigation ditch by Jones' Lane) Comment
  UC1076476  Grayia spinosa Herbert L. Mason 1930-4-20 5595 Los Angeles Mohave Desert, Rock Creek region Comment
  UC1192228  Grindelia hirsutula Herbert L. Mason 1945-8-16 12654 Solano near Suisun Bay; Grizzly Island Comment
  UC912517  Grindelia hirsutula Herbert L. Mason 1929-9-1 5416 Mendocino 3 mi n Fort Bragg Comment
  JEPS54063  Guillenia flavescens H. L. Mason 1930-3-30 San Benito 20 mi. s. Hollister (2 mi. n. of Willow Creek School, 1/4 mi. n.e. of rd. along San Benito R., across a meadow and across the river bed) Comment
  UC672169  Gutierrezia sarothrae H. L. Mason 1926-5-2 3205 Riverside Temecula Valley Comment
  UC179083  Hackelia mundula Herbert L. Mason 1941-7-7 12508 Madera Moraine Meadow trail opposite junction to Givens Lake; Sierra Nevada, Yosemite National Park Comment
  SEINET10605896  Hainardia cylindrica Mason 1935-6-15 Mason 9041 Monterey Mound Meadow, Point Lobos State Park. Comment
  UCD138414  Hastingsia alba Herbert L. Mason 1950-7-15 14051 Trinity Scott Mountain. Comment
  UC1093642  Hastingsia alba Herbert L. Mason 1957-7-7 14748 Plumas in lateral stream above Feather River Canyon (along Alternate Route #40, 2 mi e of Rich Bar); above Feather River Canyon Comment
  UC912312  Hazardia squarrosa var. grindelioides Herbert L. Mason 1929-10-12 5494 San Luis Obispo 8.4 mi from Atascadero Comment
  SACT000816  Heleochloa schoenoides Herbert Mason 1945-7-11 Colusa Alkali Plains three miles above Colusa. Comment
  UC1076043  Helianthella californica subsp. nevadensis Herbert L. Mason 1947-5-17 14761 Siskiyou on Scott Mountain Road five mi s Callahan Comment
  RSA0012972  Helianthus nuttallii subsp. nuttallii H. L. Mason 1947-8-11 13492 Lassen Hwy 81, west margin of Lower Lake, north boundary of Lassen County with Modoc County Comment
  UC912616  Hemizonella minima H. L. Mason 1923-7-28 664 Mariposa Porcupine Flat Sierra Nevada Mountains, Yosemite National Park 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
  UCD98167  Herniaria hirsuta var. cinerea Herbert L. Mason 1932-3-19 6825 San Joaquin 2 miles east of Midway, between Mountain House and Tracy. Comment
  UC1179105  Hesperevax acaulis var. acaulis Herbert L. Mason 1938-4-14 11714 Tulare 4 mi e Exeter; Rocky Hill 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
  UC629721  Hesperevax caulescens H. L. Mason 1939-4-16 12081 San Joaquin Junction of Austin Road and Little John Creek; Stockton Comment
  UC672280  Hesperevax sparsiflora var. sparsiflora H. L. Mason 1928-4-28 4411 Marin Tiburon Peninsula Comment
  UC672282  Hesperevax sparsiflora var. sparsiflora H. L. Mason 1934-4-8 Alameda 10 mi from Marsh Creek. Livermore; Livermore Road Comment
  UC1076041  Hesperochiron californicus Herbert L. Mason 1947-5-17 14797 Unknown above Scott Mt. grade (Siskiyou-Trinity county line) Comment
  UC672368  Hesperochiron californicus Herbert L. Mason 1926-5-29 3298 Placer Placer Co. Public Camp Ground Comment
  UC1212347  Hesperolinon bicarpellatum Herbert L. Mason 1952-6-15 14298 Lake head Butts Creek Canyon; Inner North Coast Range Comment
  CAS-BOT-BC167442  Hesperolinon breweri Herbert L. Mason 1936-6-14 s.n. Contra Costa Ridge running south of Mount Diablo, head of Marsh Creek Comment
  CAS-BOT-BC176001  Hesperolinon californicum Herbert L. Mason 1946-5-30 12795 Lake Locomono Creek near Middletown Comment
  UC634665  Hesperolinon clevelandii H. L. Mason 1934-5-5 8112 Lake east side of mountain Mount Konocti Comment
  UC571119  Hesperolinon congestum H. L. Mason 1928-4-28 4409 Marin Tiburon Peninsula Comment
  UC1212509  Hesperolinon disjunctum Herbert L. Mason 1952-6-19 14306 Glenn Black Diamond Ridge Inner North Coast Ranges Comment
  UC1212510  Hesperolinon disjunctum Herbert L. Mason 1952-6-19 14304 Glenn Black Diamond Ridge Inner North Coast Ranges, Mendocino National Forest 822 Comment
  UC1212512  Hesperolinon disjunctum Herbert L. Mason 1946-5-31 12813 Colusa one mi e Lake County line (Bartlett Springs to Williams road); Inner North Coast Ranges 609 Comment
  UC1212513  Hesperolinon disjunctum Herbert L. Mason 1946-5-30 12806 Lake on road from Bartlett Springs to Williams where hwy crosses North Fork of Cache Creek east of Allen Springs; Inner North Coast Ranges 487 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
  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
  CAS-BOT-BC179174  Hesperolinon micranthum Herbert L. Mason 1946-7-13 13448 Modoc W end of Fandango Pass, near Goose Lake. Comment
  CAS-BOT-BC179175  Hesperolinon micranthum Herbert L. Mason 1946-7-13 13448 Modoc W end of Fandango Pass, near Goose Lake. 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
  JROH2921  Hesperolinon micranthum Herbert L. Mason 1921-5-18 s.n. San Mateo Jasper Ridge Biological Preserve, Stanford University; top of Jasper Ridge 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
  UC1212402  Hesperolinon spergulinum Herbert L. Mason 1946-7-4 12901 Sonoma 2 mi e Occidental; Inner North Coast Ranges Comment
  RSA151797  Hesperolinon spergulinum H. L. Mason 1946-7-4 12901 Sonoma 2 miles east of Occidental. Comment
  GH295008  Hesperomecon linearis H. L. Mason 1935-4-21 8268 Unknown Carmel Canyon Comment
  UC635448  Hesperomecon linearis H. L. Mason 1929-3-23 5096 Madera Hills back of Madera Comment
  CAS-BOT-BC422537  Hesperomecon linearis H. L. Mason 1935-4-21 8268 Monterey Carmel Valley Comment
  UCD139990  Heteranthera dubia Herbert L. Mason; Verne Grant 1946-8-14 13041 Butte Butte Sink. Comment
  UC635637  Heterocodon rariflorum H. L. Mason Apr 1930 5551 Stanislaus 2 mi s Knight's Ferry (8 mi e of Oakdale) Comment
  SEINET10460615  Heterocodon rariflorum Mason Mason 578 Tuolumne MATHER Comment
  UC555293  Heteromeles arbutifolia H. L. Mason 1926-1-1 2581 Mendocino Upper Lake to Elk Mt. Comment
  UC570890  Heuchera micrantha var. diversifolia Herbert L. Mason 1926-5-26 3237 Alameda Niles Canyon Comment
  CAS-BOT-BC203385  Hibiscus lasiocarpos var. occidentalis Herbert L. Mason 1945-9-19 12726 Sutter West Butte Road on the east side of Butte Creek Comment
  CAS-BOT-BC312979  Hieracium triste Herbert L. Mason 1937-8-31 14838 Tuolumne Sierra Nevada, Yosemite National Park. Grace Meadow, west of Saurian Crest 2651 Comment
  UC632813  Hippuris vulgaris H. L. Mason 1938-8-26 12077 San Joaquin s.w. Holt (Trapper Slough, Roberts Isl.); Roberts Isl., Trapper Slough Comment
  RSA0016762  Hippuris vulgaris H. L. Mason 1948-9-5 13670 Mono Junction of Highway 108 and 395. Comment
  UC1178028  Hollisteria lanata Herbert L. Mason 1950-4-21 14039 San Benito e side of Panoche Valley Panoche Valley Comment
  CHSC2153  Hordeum jubatum P. Mason 1937-5-23 Glenn On canal bank at Ord Bend. 39 Comment
  GH345612  Horkelia bolanderi H. L. Mason 1834-5-5 8127 Unknown between Kelseyville and Lower Lake Comment
Read comments
Apr 20 2012
  CAS-BOT-BC532199  Horkelia californica var. frondosa Herbert Mason; Edward Lee 1934-10-1 9359 Monterey Whaler's Knoll, Point Lobos State Park Comment
  UC555283 Image available Horkelia marinensis H. L. Mason 1929-9-1 5406 Mendocino 3 mi n Fort Bragg Comment
  GH345643  Horkelia parryi H. L. Mason 1933-5-29 7253 Unknown two miles south of Ione 152 Comment
  UC555679  Horkelia parryi H. L. Mason 1928-5-3 4464 Amador 1 mi s Ione Comment
  UC1076054  Horkelia tridentata subsp. flavescens Herbert L. Mason 1947-5-17 14763 Siskiyou on Scott Mountain raod five mi s Callahan; Scott Mountain Road Comment
  CAS-BOT-BC312530  Hulsea heterochroma H. L. Mason 1934-9-9 8152 Monterey Headwaters of Arroyo Seco, Santa Lucia Mountains Comment
  UC672327  Hydrophyllum capitatum var. alpinum H. L. Mason 1926-5-29 3302 Nevada Truckee River Comment
  UCD110341  Hypericum anagalloides Herbert L. Mason; S. Galen Smith 1948-8-19 8381 Merced 1 mile west of Snelling. Comment
  UC672591  Hypericum concinnum H. L. Mason 1926-5-29 3282 Nevada 5 mi. s. Grass Valley (Rattlesnake Creek); Rattlesnake Creek 609 Comment
  CAS-BOT-BC410235  Hypericum concinnum H. L. Mason 1930-6-1 5676 Lake St. Helena Creek, slopes of Mount St. Helena Comment
  UC566703  Hypochaeris glabra Herbert L. Mason 1926-4-18 2874 a San Francisco San Francisco Comment
  UC909040  Ipomopsis aggregata Herbert L. Mason 1924-6-15 1035 Plumas near junction of Greagle Creek and Feather River Blairsden Comment
  UC571179  Iris douglasiana H. L. Mason 1928-4-8 4282 Sonoma Fort Ross Comment
  UC571174  Iris macrosiphon H. L. Mason 1926-3-21 2762 Lake between Middletown and Mt. St. Helena Comment
  GH257750  Iris munzii H. L. Mason 1938-5-9 11810 Unknown North Fork of the Tule River, one mile below Milo Comment
  UC912684  Isoetes occidentalis Herbert L. Mason 1936-7-15 11249 Tuolumne 1/2 mi w Mather Comment
  CAS-BOT-BC69873  Isoetes orcuttii Mason 1917-4-8 1184 San Bernardino Red Hill, near Upland. Comment
  CAS-BOT-BC112554  Isolepis cernua Herbert L. Mason 1946-6-9 12866 San Luis Obispo Dune Lakes, between Ocrano and mouth of Santa Maria River. Comment
  UC634683  Isomeris arborea H. L. Mason 1926-4-28 3081 San Bernardino Box S Ranch Spring Comment
  UC1093955  Isopyrum occidentale Herbert L. Mason 1936-4-10 11049 Calaveras road between Murphys and Angels Camp Comment
  RSA85305  Isopyrum stipitatum H. L. Mason 1927-3-20 657 Alameda Arroyo Mocho, 17 miles S of Livermore Comment
  UC642662  Ivesia lycopodioides subsp. lycopodioides H. L. Mason 1936-7-29 11428 Mono Conness Glacier; Sierra Nevada 3505 Comment
  GH345719  Ivesia muirii H. L. Mason 1923-8-2 700 Unknown Johnson's Peak, near headwaters of Unicorn Creek, West-facing gravely slope Comment
  UC555633  Ivesia muirii H. L. Mason 1923-8-2 700 Tuolumne near headwaters of Unicorn Creek; Johnson's Peak Comment
  UC1093883  Ivesia santolinoides Herbert L. Mason 1938-7-28 12039 Tuolumne e of Tilden Lake (Macomb Ridge); Sierra Nevada, Yosemite National Park 3048 Comment
  CAS-BOT-BC142372  Ivesia shockleyi Herbert L. Mason 1936-7-28 11397 Mono Dana Plateau, vicinity of Mount Dana - Sierra Nevada 3657 Comment
  UC1191846  Jaumea carnosa Herbert L. Mason 1945-7-20 14801 Monterey near Moss Landing; Elkhorn Slough Comment
  UC1192236  Jaumea carnosa Herbert L. Mason 1949-7-7 14033 San Mateo marshes at mouth Pescadero Creek Comment
  UC1081518  Jepsonia heterandra Herbert L. Mason 1936-3-14 10979 Calaveras 2 mi e Mokelumne Hill Comment
  UC1100958  Juncus balticus Herbert L. Mason and Verne Grant 1947-7-9 13297 Lassen 5 mi e Bieber Comment
  UC1100959  Juncus balticus Herbert L. Mason and Verne Grant 1947-6-26 13248 Solano Cordelia Slough Suisun Marsh Comment
  POM312821  Juncus breweri H. L. Mason 1946-6-9 12873 San Luis Obispo Dune Lakes, between Oceano and mouth of Santa Maria River. Comment
  UC1101045  Juncus bufonius Herbert L. Mason 1949-7-7 14028 San Mateo Mouth of Gazos Creek Comment
  UC1101047  Juncus bufonius Herbert L. Mason and Verne Grant 1947-7-9 13287 Shasta just e Hatchet Creek summit (Highway 200) 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
  UC1101031  Juncus hesperius Herbert L. Mason 1946-7-24 12932 Marin second lake s. Bear Valley (on rd. to Lake Ranch) Comment
  UC1101032  Juncus hesperius Herbert L. Mason 1946-7-24 12931 Marin second lake s Bear Valley (on road to Lake Ranch) Comment
  POM312827  Juncus hesperius H. L. Mason 1946-7-24 12931 Marin Second lake south of Bear Valley on road to Lake Ranch. Comment
  UC965654  Juncus howellii Herbert L. Mason 1952-7-16 14349 Nevada 1 mi w University of California Trout Laboratory; Sierra Nevada, Sage Hen Creek 1981 Comment
  UC1076561  Juncus macrandrus Herbert L. Mason 1938-7-19 11925 Tuolumne w of Hetch Hetchy (s island in Swamp Lake); Sierra Nevada, Yosemite National Park, Swamp Lake 1584 Comment
  UC1106321  Juncus nevadensis Herbert L. Mason, B. Fuller, and H. Whisler 1958-7-22 17 Nevada 1 mi w University of California Trout Laboratory (12 mi n of Truckee); Sierra Nevada, Sage Hen Creek 1981 Comment
  UC1101093  Juncus patens Herbert L. Mason and Verne Grant 1946-7-5 12913 Solano just n Vallejo (in Lake Chabot water reservoir); Lake Chabot Comment
  GH362739  Kalmia microphylla H. L. Mason 1923-8-2 698 Unknown Along headwaters of Unicorn Creek Comment
  GH362740  Kalmia microphylla H. L. Mason 1923-7-5 4874 Unknown Tioga Mines Comment
  GH365654  Keckiella antirrhinoides H. L. Mason 1926-4-30 3142 Unknown Pala Grade Comment
  UC565579  Keckiella breviflora Herbert L. Mason 1926-5-26 3272 Placer 5 mi above Auburn Comment
  UC565588  Keckiella cordifolia Herbert L. Mason 1926-6-15 421 Santa Barbara Gaviota Pass Comment
  JEPS19275  Keckiella lemmonii Herbert L. Mason 1945-6-28 12603 Lake se of Borax Lake; Obsidian Ridge Comment
  UC1178984  Keckiella lemmonii Herbert L. Mason 1945-6-28 12603 Lake se of Borax Lake; Obsidian Ridge Comment
  UC1111593  Kelloggia galioides Herbert L. Mason 1941-7-14 12523 Madera Ottoway Lake; Sierra Nevada, Yosemite National Park 2987 Comment
  UC555464  Krameria erecta H. L. Mason 1926-4-28 3083 San Bernardino Box S Spring Comment
  UC1076474  Krascheninnikovia lanata Herbert L. Mason 1930-4-20 5591 Los Angeles hills in the Rock Creek region Mohave Desert, Rock Creek region Comment
  UC1076550  Kumlienia hystricula Herbert L. Mason 1936-3-14 10997 Calaveras s of Sheep Ranch (San Antonio Creek); San Antonio Creek Comment
  CAS-BOT-BC349853  Lactuca tatarica subsp. pulchella Herbert L. Mason 1940-7-6 12316 Tuolumne Yosemite National Park. Miguel Meadows 1584 Comment
  HSC5891  Lactuca tatarica subsp. pulchella H. L. Mason 1940-7-6 12316 Tuolumne Miguel Meados 1585 Comment
  UC565540  Lactuca virosa Herbert L. Mason 1926-10-12 3642 Alameda Berkeley 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
  RSA131014  Lamium amplexicaule W. E. Mason 1917-04 s.n. Santa Clara Campus Stanford University. Comment
  UC571109  Larrea tridentata H. L. Mason 1930-4-20 5568 Kern Caliente Creek; Tehachapi Mountains Comment
  CAS-BOT-BC339059  Lasthenia californica H. L. Mason 1921-6-1 s.n. San Mateo Pebble Beach near Pescadero Comment
  UC566722  Lasthenia debilis H. L. Mason 1929-3-24 5113 Madera eighteen mi e Madera (at junction of Yosemite Road) Comment
  UC769987  Lasthenia fremontii Herbert L. Mason 1934-3-25 7970 Sacramento Keithly Ranch Sacramento Valley, Rio Linda Comment
  RSA114067  Lasthenia fremontii H. L. Mason 1952-4-14 14260 Contra Costa 3.5 miles S of Byron Comment
  UC566739  Lasthenia glaberrima H. L. Mason 1929-4-7 5168 Stanislaus 6 mi w Oakdale Comment
  UC566740  Lasthenia glaberrima H. L. Mason 1928-5-3 4474 Amador hills near Carbondale Comment
  CAS-BOT-BC352833  Lasthenia glabrata subsp. glabrata H. L. Mason 1929-4-29 5250 Lake Blue Lake Comment
  UC566714  Lasthenia gracilis H. L. Mason 1929-3-31 5154 Contra Costa along San Joaquin River; , Antioch Comment
  RSA116657  Lasthenia macrantha subsp. macrantha H. L. Mason 1921-6-1 s.n . San Mateo Pebble Beach near Pescadero Comment
  UC632856  Lasthenia minor H. L. Mason 1936-4-12 11083 Calaveras San Andreas Comment
  UC1191474  Lathyrus jepsonii var. jepsonii Herbert L. Mason 1945-7-12 12650 Solano Suisun Marshes Comment
  UC1076391  Lathyrus lanszwertii var. lanszwertii Herbert L. Mason 1925-7-4 2142 Tuolumne Mather Sierra Nevada 1432 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
  UC964775  Lathyrus vestitus var. alefeldii Herbert L. Mason 1926-5-1 3156 San Diego Palomar Mountain Comment
  UC964776  Lathyrus vestitus var. vestitus Herbert L. Mason 1928-5-6 4562 Alameda Cedar Mountain Comment
  CAS-BOT-BC321072  Layia gaillardioides H. L. Mason 1921-7-14 s.n. San Mateo La Honda-Pescadero Road, near Pescadero Creek Comment
  UC571050  Ledum glandulosum H. L. Mason 1930-6-1 5672 Marin Invernesss Ridge Comment
  UC571052  Ledum glandulosum H. L. Mason 1928-7-4 4870 Tuolumne Yosemite National Park, Tuolumne Meadows Tuolumne Meadows; Sierra Nevada Mountains, Yosemite National Park, Tuolumne Me Comment
  CAS-BOT-BC274325  Leersia oryzoides Herbert L. Mason 1945-9-19 12715 Colusa Below causway over Butte Sink spillway, east bank of Sacramento River, 1 mile above Colusa Comment
  UC965521  Lemna trisulca Herbert L. Mason 1952-7-10 14320 Nevada 1 mi w of California Trout Laboratory (Sage Hen Creek); Sierra Nevada, Sage Hen Creek 1981 Comment
  POM312465  Lemna trisulca H. L. Mason 1955-7-30 14638 Plumas Near Chester Comment
  UC1101269  Lemna trisulca Herbert L. Mason, Verne Grant 1947-7-12 13432 Modoc n of Likely (Corportation Ranch Headquarters); Corportation Ranch Headquarters Comment
  UC1101274  Lemna turionifera Herbert L. Mason, Verne Grant 1946-8-6 12966 Colusa 4 mi s of Colusa (w side of Sacramento River, on Colusa-Marysville Highway); Sacramento River Comment
  UC673528  Lepidium fremontii H. L. Mason 1926-4-27 3056 Los Angeles 30 mi w Victorville; Mohave Desert 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
  UC1100306  Leptochloa fascicularis Herbert L. Mason 1945-9-19 12720 A Colusa e bank of river 1 mi n Colusa (below causeway); Sacramento River Comment
  UC908682  Leptodactylon pungens Herbert L. Mason 1926-5-30 3308 El Dorado above Emerald Bay (Lake Tahoe); , above Emerald Bay 1828 Comment
  UC909074  Leptodactylon pungens Herbert L. Mason Jul 18 1941-Jul 31 1941 12518 Madera ridge w Moraine Meadows (Ottoway Lake); Yosemite National Park, , w of Moraine Meadows Comment
  CAS-BOT-BC226518  Leptosiphon acicularis H. L. Mason 1921-5-14 s.n. Alameda Hayward Comment
  HSC17090  Leptosiphon aureus H. L. Mason 1935-4-30 8348 Kern W side of Walker Pass near Summit Comment
  SD45367  Leptosiphon bicolor Herbert L. Mason 1935-5-1 8374 Tulare Kern River Canyon north of Kernvelle in Sequoia National Forest. Comment
  CAS-BOT-BC226620  Leptosiphon grandiflorus H. L. Mason 1940-5-5 12275 Madera Los Banos Creek Comment
  HSC17103  Leptosiphon grandiflorus H. L. Mason 1940-5-5 12275 Madera Los Banos Creek Comment
  CAS-BOT-BC226736  Leptosiphon latisectus Herbert L. Mason 1928-4-8 4289 Sonoma Coast, 2 miles north of Fort Ross Comment
  SD44506  Leptosiphon liniflorus Herbert L. Mason 1935-5-2 8386 Kern Plains east of Bakersfield. Comment
  UC964718  Leptosiphon parviflorus Herbert L. Mason 1935-5-21 8315 San Mateo Pebble Beach Pescadero Comment
  UC912330  Lessingia micradenia var. micradenia Herbert L. Mason 1925-9-17 2233 Marin near Phoenix Lake Comment
  JEPS19709  Lessingia pectinata var. tenuipes Herbert L. Mason 1930-10-25 5780 Monterey between Jolon and Santa Lucia Ranger Station (along the San Antonio River); foothills of the Santa Lucia Mountains, along the San Antoni Comment
  UC1093965  Lessingia pectinata var. tenuipes Herbert L. Mason 1930-10-25 5780 Monterey between Jolon and Santa Lucia Ranger Station; foothills of the Santa Lucia Mts., San Antonio River Comment
  CDA8201  Lessingia ramulosa M. Mason 1976-7-6 Sonoma Airport Road, Sonoma County Airport, northwest of Santa Rosa. 0 Comment
  UC912255  Lessingia ramulosa Herbert L. Mason 1928-7-20 4912 Lake s Kelseyville Comment
  CAS-BOT-BC229481  Lewisia kelloggii Herbert L. Mason 1941-7-6 12495 Mariposa Sierra Nevada, Yosemite National Park. Horse Ridge 2895 Comment
  UC1076056  Lewisia nevadensis Herbert L. Mason 1947-5-17 14795 Unknown above Scott Mountain grade (Siskiyou-Trinity counties) Comment
  UC642830  Lewisia pygmaea H. L. Mason 1923-8-1 681 Tuolumne Lyell Fork of Tuolumne River Sierra Nevada, Yosemite National Park, Lyell Fork of Tuolumn Comment
  UC1076040  Lewisia rediviva Herbert L. Mason 1947-5-17 14776 Unknown summit of Scott Mountain grade Trinity-Siskiyou County Line Comment
  UC566843  Ligusticum apiifolium Herbert L. Mason 1926-5-22 3220 Alameda Berkeley Hills Comment
  UC1100170  Lilaea scilloides Herbert L. Mason 1948-6-29 13586 Merced 2 mi n Volta Comment
  UC566870  Lilaeopsis occidentalis H. L. Mason 1929-8-24 5402 Mendocino Fort Bragg, Pudding Creek Slough Comment
  UC673397  Lilium humboldtii Herbert L. Mason 1923-6-15 417 Santa Barbara Gaviota Pass Comment
  UC673408  Lilium occidentale Herbert L. Mason 1932-7-21 7106 Humboldt Trinidad Head Comment
  SEINET8727023 Image available Limnanthes alba Charles T. Mason Jr. 1949-1 1294 Placer 4.3 miles S. W. of Placerville along U. S. Highway 50. Comment
  UC971854  Limnanthes alba subsp. versicolor Charles T. Mason Jr. 1949-5-9 1294 El Dorado along US Hwy 50 4.3 mi sw Placerville Comment
  UC971859  Limnanthes alba subsp. versicolor Charles T. Mason Jr. 1949-4-25 1261 Shasta 6.7 mi w Ingot (along US Hwy 299) 304 Comment
  UC971861  Limnanthes alba subsp. versicolor Charles T. Mason Jr. 1949-4-25 1263 Shasta along US Hwy 299 4.2 mi w Ingot 304 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
  POM311141  Limnanthes bakeri C. T. Mason 1948-5-8 1181 Mendocino 0.6 miles N of Willits High School on east side of Hwy 101 427 Comment
  UC971875  Limnanthes douglasii subsp. douglasii Charles T. Mason Jr. 1948-5-16 1197 Marin field 1/2 mi n Nicasio School (w side of Nicasio-Fairfax road) Comment
  UC971876  Limnanthes douglasii subsp. douglasii Charles T. Mason Jr. 1948-3-14 1198 Marin Petaluma-Point Reyes road 0.5 mi se junction with Fairfax-Nicasio-Point Reyes road Comment
  POM311137  Limnanthes douglasii subsp. douglasii Charles T. Mason Jr. 1948-3-15 1199 Marin Along Petaluma-Pt. Reyes road 1 mi. NE of junction with Fairfax-Nicasio-Pt. Reyes Road. Comment
  UC971868  Limnanthes douglasii subsp. douglasii Charles T. Mason Jr. 1948-3-7 1117 Sonoma along Sonoma-Glen Ellen-Santa Rosa road; ditch at crossroad Comment
  UC971871  Limnanthes douglasii subsp. douglasii Charles T. Mason Jr. 1948-3-27 1138 Napa about 5 mi s Monticello (along Monticello-Napa road) Comment
  UC971806  Limnanthes douglasii subsp. nivea Charles T. Mason Jr. 1948-5-8 1180 Mendocino along US Hwy 101 5 mi s Willits 609 Comment
  UC971838  Limnanthes douglasii subsp. nivea Herbert L. Mason 1941-4-5 Lake Borax Lake Comment
  UC635578  Limnanthes douglasii subsp. rosea H. L. Mason 1929-3-24 5106 Madera 18 mi e Madera (at junction of Yosemite Road) Comment
  UC971790  Limnanthes douglasii subsp. rosea Charles T. Mason Jr. 1949-3-31 1244 Merced 5 mi se Merced (along road to El Nido) Comment
  UC971818  Limnanthes douglasii subsp. rosea Charles T. Mason Jr. 1948-3-27 1134 Contra Costa 0.1 mi s Byron Hot Springs road (along Byron-Bethany road) Comment
  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
  SEINET6670600  Limnanthes douglasii subsp. rosea C. T. Mason 1949-3-29 1241 Sacramento Four miles east of Sloughhouse on north and south sides of State Highway 16 Comment
  CAS-BOT-BC45926  Limnanthes floccosa subsp. californica Charles T. Mason, Jr. 1949-4-24 1255 Butte 8 miles N.W. of Oroville along the Oroville-Chico road Comment
  UC971878  Limnanthes floccosa subsp. californica Charles T. Mason Jr. 1949-4-24 1255 Butte 8 mi nw Oroville (along the Oroville-Chico road, near a large asphalt area marked Bombing Range) Comment
  UC971894  Limnanthes montana Charles T. Mason Jr. 1949-5-9 1289 Mariposa 6 mi n Raymond-Le Grande-Mormon Bar corner Comment
  UC635575  Limnanthes striata H. L. Mason 1928-5-4 4513 El Dorado 4 mi above Shingle Springs (along streams) Comment
  UC971902  Limnanthes striata Charles T. Mason Jr. 1948-4-25 1155 Calaveras 3.4 mi n Altaville (on State Hwy 49) 304 Comment
  UC971900  Limnanthes striata Charles T. Mason Jr. 1948-4-24 1147 Amador State Hwy 16 0.5 mi e junction with Highway 104 (ditch in field on s side of hwy) 121 Comment
  POM311142  Limnanthes versicolor Charles T. Mason Jr. 1949-4-25 1258 Shasta Along U.S. Highway 299 between Redding and Bella Vista. Comment
  POM311145  Limnanthes versicolor Charles T. Mason Jr. 1948-5-13 1189 El Dorado 12.7 miles north of Plymouth along S.E. side of State Highway 49. 518 Comment
  UC1101422  Limosella acaulis Herbert L. Mason 1947-8-12 13504 Modoc Junction of North and South Forks of Pit River Alturas (Alturas); Junction of North and South Forks of Pit River Comment
  UC1101423  Limosella acaulis Herbert L. Mason 1947-8-13 13529 Modoc ne side F Reservoir (n of Canby); ne side of F reservoir Comment
  UC907872  Linanthus Herbert L. Mason 1932-4-25 8024 El Dorado Shingle Springs Comment
  UC907966  Linanthus acicularis Herbert L. Mason 1933-4-30 7218 Lake Middletown Comment
  UC908561  Linanthus ambiguus Herbert L. Mason 1932-4-17 6950 Santa Clara road to Sweedal, headwaters of Uvas Creek Uvas Creek Comment
  UC908568  Linanthus ambiguus Herbert L. Mason 1926-4-11 2825 Alameda Rancho Repose Cedar Mountain 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
  UC908951  Linanthus androsaceus Herbert L. Mason 1933-4-21 7194 Santa Clara road above Smith Creek (on slopes of Isabel Creek); Mount Hamilton Range, Isabel Creek Comment
  UC907843  Linanthus androsaceus Herbert L. Mason 1943-4-15 12564 Santa Clara w side Pachaco Pass (border of Santa Clara-Merced Counties) Comment
  UC723911  Linanthus arenicola Herbert L. Mason 1935-4-30 8294 San Bernardino sw of Trona; Mohave Desert, Poison Canyon; Poison Canyon, SW of Trona, Mohave Desert, San Bernardino Co. 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
  SEINET8729330 Image available Linanthus aureus Herbert L. Mason 1926-1 2945 Los Angeles Pacoima Wash, foothills of San Gabriel Mountains. 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
  UC963767  Linanthus bicolor Herbert L. Mason 1935-5-1 8374 Tulare n of Kernville Canyon; Sequoia National Forest, Kern River Canyon Comment
  SEINET10805448  Linanthus californicus Herbert L. Mason 1941-3-28 Mason 12402 San Luis Obispo North end of Nipomo Mesa. 76 Comment
  UC908356  Linanthus ciliatus H. L. Mason 1935-5-9 Stanislaus Arroyo del Puerto Mount Hamilton Range, Red Mountains Comment
  UC963790  Linanthus ciliatus Herbert L. Mason 1938-5-10 11821 Madera n of Wood Lake (on Sequoia National Park Road) Comment
  UC963808  Linanthus concinnus Herbert L. Mason 1934-3-30 8035 Los Angeles s of Valyermo (Rock Creek, n side of San Gabriel Mountains); San Gabriel Mountains, Rock Creek Comment
  UC1051463  Linanthus demissus Herbert L. Mason 1952-4-9 14234 San Bernardino s of Needles; Sawtooth Range Comment
  SEINET196202  Linanthus dichotomus Herbert L. Mason 1926-4-11 2826 Alameda Cedar Mountain, Mount Hamilton Range. Comment
  UC689684  Linanthus dichotomus Herbert L. Mason 1942-5-24 12540 Napa 3 mi s Pope Valley Store Comment
  UC971717  Linanthus dichotomus Herbert L. Mason 1942-5-24 12540 Napa 8 mi s Pope Valley Store Comment
  JEPS13930  Linanthus filipes Herbert L. Mason 1926-5-28 3259 El Dorado between Shingle Springs and Coloma; Rose Springs 396 Comment
  UC907947  Linanthus filipes Herbert L. Mason 1938-4-14 11719 Tulare 4 mi e Exeter 304 Comment
  UC909141  Linanthus filipes Herbert L. Mason 1928-5-4 4515 El Dorado 4 mi n Shingle Springs Comment
  UC907887  Linanthus grandiflorus H. L. Mason 1932-7-24 7123 Marin Point Reyes Comment
  UCR66532  Linanthus grandiflorus H. L. Mason 1940-5-5 12275 Madera Los Banos Creek Comment
  GH385227  Linanthus grandiflorus H. L. Mason 1940-5-5 12275 Unknown Los Banos Creek Comment
  UC1056990  Linanthus harknessii Herbert L. Mason 1936-8-6 11508 Mariposa Peregoy Meadow, Glacier Point road Sierra Nevada, Yosemite National Park 2255 Comment
  UC1191631  Linanthus harknessii Herbert L. Mason 1948-7-18 13606 a Siskiyou Grass Lake Comment
  UC1051457  Linanthus jonesii Herbert L. Mason 1952-4-7 14207 Riverside Palm Canyon Palm Spring Comment
  UC908956  Linanthus latisectus Herbert L. Mason 1929-5-9 5274 Mendocino 5 mi nw Laytonville Comment
  SEINET8729348 Image available Linanthus liniflorus Herbert L. Mason 1935-1 8386 Kern Plains east of Bakersfield. Comment
  UC972233  Linanthus montanus Herbert L. Mason 1936-5-15 11114 Mariposa 3 mi e Coulterville Comment
  UC907959  Linanthus parryae Herbert L. Mason 1926-4-26 2990 Los Angeles 1 mi E of Palmdale; Mohave Desert Comment
  UC754224 Image available Linanthus parviflorus Herbert L. Mason 1941-4-6 12414 Butte Cherokee; ; Cherokee, Butte Co. 304 Comment
  UC907832  Linanthus parviflorus Herbert L. Mason 1938-5-8 11805 Santa Barbara vicinity Figueroa Mountain summit; Figueroa Mountain 1371 Comment
  UC907984  Linanthus parviflorus Herbert L. Mason 1926-6-6 3380 Santa Cruz just below Woodwardia Falls; Big Basin Comment
  UC909079  Linanthus parviflorus Herbert L. Mason 1932-7-24 7124 Marin Point Reyes Comment
  UC908607  Linanthus parviflorus Herbert L. Mason 1930-4-21 5609 Monterey Priest Valley Comment
  UC908692  Linanthus parviflorus Herbert L. Mason 1926-3-22 2790 Napa along road from Calistoga to Petrified Forest (near Sonoma County line) Comment
  UC908955  Linanthus parviflorus Herbert L. Mason 1928-4-13 4332 Napa between Santa Rosa and Calistoga Comment
  UC1178837  Linanthus pygmaeus Herbert L. Mason 1940-5-3 12261 Merced 2 mi ne Ortigalita Peak; South Coast Ranges, Ortigalita Canyon 304 Comment
  UC908599  Linanthus pygmaeus Herbert L. Mason 1935-5-30 8322 Lake w of Mirabel Lake Comment
  UC908626  Linanthus pygmaeus Herbert L. Mason 1932-4-3 6918 Fresno 3 mi w Coalinga (on the Priest Valley road) Comment
  POM257229  Lipocarpha occidentalis H. L. Mason 1938-7-13 11945 Mariposa Yosemite National Park; Base of El Capitan, Yosemite Valley 1227 Comment
  UC632743  Lipocarpha occidentalis H. L. Mason 1938-7-22 11981 Tuolumne n of Hetch Hetchy (Vernon Lake Trail, Yosemite National Park); Sierra Nevada, Yosemite National Park 2072 Comment
  UC635727  Lipocarpha occidentalis Herbert L. Mason 1937-7-21 11557 a 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
  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
  UC570877  Lithophragma Herbert L. Mason 1926-5-29 3294 Nevada 3 mi w Cisco; Crystal Lake 1767 Comment
  UC573141  Lithospermum californicum Herbert L. Mason 1929-5-18 5333 Shasta 8 mi n Lamoine Comment
  UC909081  Loeseliastrum matthewsii Herbert L. Mason 1926-4-27 3058 Los Angeles 30 mi. w. Victorville; Mojave Desert Comment
  UC909086  Loeseliastrum schottii Herbert L. Mason 1926-4-28 3099 San Bernardino s. Lucerne Valley (Box S Ranch); Box S Ranch Comment
  UC1077103  Logfia depressa Herbert L. Mason 1940-3-23 12248 San Bernardino 1/2 mi s Trona; Searles Lake Comment
  UC1099791  Logfia depressa Herbert L. Mason 1952-4-9 14236 a San Bernardino 10 mi s Needles Comment
  UC1111564  Logfia depressa Herbert L. Mason 1940-3-23 12247 San Bernardino 0.5 mi s Trona; Searles Lake Comment
  UC581144  Logfia depressa H. L. Mason 1935-3-29 8209 Kern Red Rock Canyon Mojave Desert Comment
  UC581149  Logfia depressa H. L. Mason 1935-3-28 8182 San Bernardino road between Barstow and Stoddards Well Comment
  SEINET190350 Image available Logfia filaginoides H. L. Mason 1933-1 7215 Monterey Pajaro Hills Comment
  UC1051482  Logfia filaginoides Herbert L. Mason 1952-4-27 14280 San Benito San Carlos Canyon Comment
  UC632834  Logfia filaginoides H. L. Mason 1936-4-26 11093 Lake Bartlett Mountain Comment
  UC1093862  Logfia gallica Herbert L. Mason 1947-5-4 13210 Sonoma near Kenwood; Hood Mountain Comment
  UC912638  Lolium perenne Herbert L. Mason 1926-5-24 3231 Alameda Berkeley, Univ. of Calif. campus Comment
  UC634777  Lomatium caruifolium var. caruifolium H. L. Mason 1925-3-1 1262 San Francisco Bernal Heights Comment
  UC592171  Lomatium marginatum var. marginatum H. L. Mason 1928-5-3 4489 El Dorado at mouth Clark Creek (near bridge of Cosumnes River) Comment
  UC1111592  Lomatium nevadense var. parishii Herbert L. Mason 1941-7-14 12522 Madera Sierra Nevada, Yosemite Nat'l Park, Ottoway Lake 2987 Comment
  UC1077107  Lomatium torreyi Herbert L. Mason 1938-7-22 11962 Tuolumne n. Hetch Hetchy (Vernon Lake Trail, Yosemite Nat'l Park); Sierra Nevada, Yosemite Nat'l Park, Vernon Lake Trail 2072 Comment
  SEINET196252  Lomatium utriculatum Herbert L. Mason 1934-3-25 7971 Sacramento Keithly ranch Rio Linda Comment
  UC566798  Lomatium utriculatum H. L. Mason 1929-3-29 5138 Contra Costa above, Marsh Creek Road Clayton Comment
  UC632804  Lonicera cauriana Herbert L. Mason 1936-7-27 11392 Tuolumne Gaylor Lakes west of Tioga Pass 3200 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
  UC1076400  Lonicera interrupta Herbert L. Mason 1925-7-29 2184 Tuolumne Hog Ranch Mather Comment
  UC1076402  Lonicera interrupta H. L. Mason 1925-6-27 2122 Tuolumne Mather Sierra Nevada Mountains, Yosemite National Park Comment
  UC555530  Lotus formosissimus H. L. Mason 1928-4-13 4308 Marin n of San Rafael Comment
  UC555532  Lotus grandiflorus var. grandiflorus H. L. Mason 1928-5-4 4531 El Dorado near Pilot Hill; Hastings Creek Comment
  UC555404  Lotus heermannii H. L. Mason 1931-11-1 5880 Monterey road between Monterey and Carmel Comment
  UC1178840  Lotus humistratus Herbert L. Mason 1940-5-3 12253 Merced 2 mi ne Ortigalita Peak; South Coast Ranges, Ortigalita Canyon 304 Comment
  UC555544  Lotus scoparius H. L. Mason 1923-6-23 551 Monterey Carmel River Comment
  UC555524  Lotus stipularis var. ottleyi Herbert L. Mason 1927-5-10 3711 Butte ne of Oroville (Cherokee Mine); Table Mt. Comment
  UC1093957  Lotus stipularis var. ottleyi Herbert L. Mason 1936-5-15 11112 Mariposa 3 mi above Coulterville Comment
  SEINET3560015 Image available Lotus strigosus Herbert L. Mason 1938-4-14 11707 Tulare 4 miles east of Exeter Comment
  UC555413  Lotus strigosus H. L. Mason 1926-4-30 3115 Riverside 1 mi s Temecula; Temecula Canyon Comment
  UC555419  Lotus strigosus Herbert L. Mason 1926-4-19 2866 San Francisco San Francisco Comment
  UC555414  Lotus strigosus H. L. Mason 1923-7-15 602 Tuolumne Salt Log Meadow Sierra Nevada Mountains, Yosemite National Park Comment
  UC555420  Lotus wrangelianus H. L. Mason 1929-5-7 5263 Contra Costa Moraga Ridge Comment
  UC555422  Lotus wrangelianus Herbert L. Mason 1932-3-19 6821 San Joaquin 2 mi e Midway Comment
  UC1191223  Lupinus Herbert L. Mason 1937-7-22 11576 Tuolumne Swamp Lake Sierra Nevada, , Swamp Lake (w of Hetch Hetchy Dam) 1584 Comment
  UC775187  Lupinus andersonii Herbert L. Mason 1941-7-12 12481 Tuolumne w Hetch Hetchy Valley (Miguel Meadow, Yosemite National Park); Sierra Nevada, Yosemite National Park 1584 Comment
  UC1056993  Lupinus bicolor Herbert L. Mason 1938-4-17 11737 Mariposa ridge w Mormon Bar; Sierra Nevada foothills, w of Mormon Bar 548 Comment
  SEINET3823000 Image available Lupinus concinnus var. agardhianus Herbert L. Mason 1941-3-27 12396 Santa Barbara Top of Burton Mesa, above Pine Canyon, E of Lompoc Comment
  UC1178945  Lupinus covillei Herbert L. Mason 1937-8-1 14842 Tuolumne Twin Lakes Trail Sierra Nevada, Yosemite National Park (Yosemite National Park) 2743 Comment
  UC1212114  Lupinus croceus Herbert L. Mason 1947-5-17 14759 Siskiyou 5 mi S of Callahan ( on Scott Mountain Road) Comment
  UC1076563  Lupinus formosus H. L. Mason 1928-10-3 4987 Monterey Carmel Valley Comment
  YM-YOSE64610  Lupinus latifolius var. columbianus H. L. Mason 1938-7-28 12030 Tuolumne MACOMB RIDGE EAST OF TILDEN LAKE 3048 Comment
  UC1076227  Lupinus odoratus Herbert L. Mason 1926-4-26 3018 Los Angeles Little Rock Comment
  RSA104354  Lupinus peirsonii H. L. Mason 1926-4-27 3026 Los Angeles Rock Creek Canyon, lower Pinyon Pine belt 1296 Comment
  UC632760  Lupinus stiversii H. L. Mason 1938-7-6 11861 Tuolumne between Swamp Lake and Miguel Meadow (Yosemite National Park); Sierra Nevada, , btw Swamp Lake and Mi 1645 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
  UC632757  Luzula comosa var. laxa H. L. Mason 1938-7-9 11894 Tuolumne Yosemite National Park. Swamp Lake, west of Hetch Hetchy 1584 Comment
  CAS-BOT-BC436724  Luzula comosa var. laxa Herbert L. Mason 1937-7-21 11580 Tuolumne Yosemite National Park, Miguel Meadow, ca. 3 miles NW of Hetch Hetchy dam 1584 Comment
  POM312920  Luzula spicata H. L. Mason 1936-7-27 11390 Tuolumne Gaylor Lakes, Yosemite National Park. 3049 Comment
  UC1191829  Lycopus americanus Herbert L. Mason and Verne Grant 1946-8-14 13025 Butte canal near big pond on Sacramento Outing Club Comment
  UC1191828  Lycopus asper Herbert L. Mason 1947-8-11 13490 Modoc w. margin Lower Lake (on Hwy. 81, near boundary between Lassen & Modoc Co.'s) Comment
  CAS-BOT-BC215683  Lycopus uniflorus Herbert L. Mason; L. W. Reinecke 1937-7-22 11589 Tuolumne Swamp Lake, just south of Miguel Meadows, just west of Hetch Hetchy Dam, Yosemite National Park 1584 Comment
  CAS-BOT-BC215687  Lycopus uniflorus Herbert L. Mason; L. W. Reinecke 1937-7-22 11589 Tuolumne Swamp Lake, just south of Miguel Meadows, jsut west of Hetch Hetchy Dam, Yosemite National Park 1584 Comment
  GH345133  Lyonothamnus floribundus var. aspleniifolius H. L. Mason 1927-9-25 4109 Unknown Hills about Pelican Bay. Santa Cruz Island. Comment
  UC1191567  Lythrum californicum Herbert L. Mason, S. Galen Smith 1948-8-18 8345 Fresno San Joaquin, San Joaquin Valley San Joaquin Valley; San Joaquin, San Joaquin Valley Comment
  UCD102992  Lythrum californicum Herbert L. Mason; S. Galen Smith 1948-8-18 8345 Fresno San Joaquin. Comment
  UCD102995  Lythrum californicum Herbert L. Mason 1955-7-14 14636 Contra Costa 1/2 mile E of Antioch Bridge. 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
  CAS-BOT-BC179109  Lythrum tribracteatum Herbert Louis Mason; Verne Grant 1947-7-10 13324 Modoc Dorris Reservoir, 2 mi. E of Alturas. Comment
  UC1191585  Lythrum tribracteatum Herbert L. Mason, Verne Grant 1947-7-10 13324 Modoc 2 mi e of Alturas (Dorris Reservoir); Dorris Reservoir Comment
  UC912324  Madia exigua H. L. Mason 1932-4-25 6989 Amador above Ione Comment
  UC912592  Madia exigua Herbert L. Mason 1932-5-4 7053 Contra Costa Laundry Farm Oakland Hills Comment
  SEINET11601356 Image available Madia exigua H. L. Mason 1958-7-16 14371 Nevada Sage Hen Creek, peat meadow back of stream, one mile west of University of California Trout Laboratory 1981 Comment
  CAS-BOT-BC49450  Madia glomerata Herbert Louis Mason 1947-8-11 13496 Modoc On Hwy 81, W margin of Lower Lake, near boundary between Lassen and Modoc counties. Comment
  UC1191985  Madia glomerata Herbert L. Mason 1947-8-11 13496 Modoc on Hwy 81 near boundary between Lassen and Modoc Counties (w margin of lake); Lower Lake 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
  POM312519  Madia glomerata H. L. Mason 1947-8-11 13496 Modoc On Highway 81, west margin of Lower Lake, near boundary between Lassen and Modoc counties. Comment
  UC1191219  Madia radiata Herbert L. Mason 1952-4-27 14285 San Benito ca 3 mi from mouth San Carlos Canyon Comment
  UC672092  Maianthemum dilatatum Herbert L. Mason 1929-4-26 5226 Marin marsh near summit Light House Rd. Inverness Ridge Comment
  UC1191225  Malacothrix clevelandii Herbert L. Mason 1935-5-1 8372 Tulare n Kernville; Kern River, Sequoia National Forest Comment
  UC565539  Malacothrix clevelandii H. L. Mason 1927-6-11 3748 Los Angeles Mount Wilson San Gabriel Mountains, Mount Wilson 1219 Comment
  UC565551  Malacothrix coulteri H. L. Mason 1932-4-3 6910 Kern between Blackwell and Lost Hills Comment
  UC1275794  Malacothrix glabrata Herbert L. Mason 1963-6-24 15214 Mono Paoha Island Mono Lake Comment
  SEINET7881866 Image available Malacothrix obtusa Herbert L. Mason 1952-1 14283 San Benito ca. 3 miles from mouth of San Carlos Canyon 0 Comment
  UC635194  Malosma laurina H. L. Mason 1923-6-17 468 Santa Barbara Santa Barbara, Mountain Drive Comment
  UC555510  Malus fusca H. L. Mason 1932-7-21 7101 Humboldt Big Lagoon Comment
  UCD116680  Malva sylvestris Herbert L. Mason 1952-6-10 s.n. Contra Costa Waste land near Dwinelle Hall, University of California, Berkeley. Comment
  GH257618  Meconella californica H. L. Mason 1928-2-22 4162 Unknown San Bruno Mountains Comment
  UC1178935  Meconella californica Herbert L. Mason 1953-4-2 14500 Tulare near Aukland (on Hwy 65) Comment
  CAS-BOT-BC422742  Meconella denticulata H. L. Mason 1927-6-14 3754 Los Angeles San Antonio Canyon, San Gabriel Mountains 914 Comment
  SEINET12190917  Melaleuca nesophila E. Mason, Tebbett 1950-1 s.n. Los Angeles resort near Los Angeles 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
  UC912653  Melica torreyana H. L. Mason 1926-5-26 3238 Alameda Niles Canyon Comment
  UC634868  Melissa officinalis H. L. Mason 1925-9-17 2235 Contra Costa stream in Redwood Canyon Redwood 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
  UC634876  Mentha canadensis H. L. Mason 1925-7-4 2146 Tuolumne Mather Comment
  UC672670  Mentzelia affinis H. L. Mason 1930-3-30 5539 San Benito 14 m below Pinnacles; San Benito River Canyon Comment
  UC672662  Mentzelia albicaulis H. L. Mason 1932-4-1 6876 San Bernardino road from roosevelt to Muroc Mohave Desert 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
  UC1051446 Image available Mentzelia eremophila Herbert L. Mason 1952-4-6 14205 Kern South of Belridge Comment
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Apr 16 2019
  SEINET199118  Mentzelia pectinata Herbert Mason 1952-4-6 14205 Kern South of Belridge. Comment
  YM-YOSE64872  Menyanthes trifoliata Harry L. Mason 1938-7-10 11924 Tuolumne SOUTH ISLAND Comment
  CAS-BOT-BC428955  Micranthes californica H. L. Mason 1931-3-7 5807 Sonoma Vine Hill School, 12 miles west of Santa Rosa Comment
  GH414153  Micropus amphibolus H. L. Mason 1934-4-28 8081 Unknown Jensen's Ranch, head of Dohrman Creek, four miles west of Healdsburg Comment
  UC632855  Micropus amphibolus H. L. Mason 1936-5-2 11098 Lake Bartlett Mountain road four mi above Lucerne Comment
  UC1051485  Micropus californicus var. californicus Herbert L. Mason 1952-4-27 14281 San Benito San Carlos Canyon Comment
  UC581112  Micropus californicus var. californicus H. L. Mason 1934-4-28 8077 Sonoma head Dohrmann Creek; Jensen's Ranch Comment
  UC672237  Micropus californicus var. californicus Herbert L. Mason 1928-4-13 4317 Marin hill n San Rafael Comment
  UC672250  Micropus californicus var. californicus Herbert L. Mason 1932-4-25 7016 El Dorado Pilot Hill Sierra Nevada foothills Comment
  UC912263  Micropus californicus var. californicus Lucile Mason 1932-5-25 Shasta hill above Redding Comment
  UC912408  Micropus californicus var. californicus Herbert L. Mason 1929-3-29 5129 Contra Costa Marsh Creek Road 2 mi e Clayton; Marsh Creek Road Comment
  CAS-BOT-BC348389  Micropus californicus var. californicus H. L. Mason 1933-5-28 7236 Placer Tahoe-Colfax road, three to four miles north of Colfax Comment
  CAS-BOT-BC348621  Micropus californicus var. californicus H. L. Mason 1934-4-28 8077 Sonoma Jensen's Ranch, head of Dohrmann Creek Comment
  UC672252  Micropus californicus var. californicus H. L. Mason 1933-5-28 7236 Placer Tahoe-Colfax road three to four mi Colfax Comment
  UC673615  Micropus californicus var. californicus Herbert L. Mason 1933-4-21 7188 Santa Clara junction of Mount Hamilton and Hendrick's Road Comment
  UC673616  Micropus californicus var. subvestitus H. L. Mason 1933-4-21 7187 Santa Clara Mount Hamilton Road 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
  UC1039776  Mimulus aurantiacus var. pubescens Herbert L. Mason 1926-5-2 3190 Riverside Aguanga Valley 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
  UC672579  Mimulus fremontii var. fremontii H. L. Mason 1926-4-30 3183 San Diego Oak Grove Comment
  UC672457  Mimulus grandis H. L. Mason June 1930 5651 Sonoma mouth Gualala River Comment
  UC1191909  Mimulus guttatus Herbert L. Mason, Verne Grant 1947-7-12 13391 Modoc several mi s Alturas (irrigation ditch by Jones' Lane, off Highway 395) Comment
  UC1040000  Mimulus layneae Herbert L. Mason 1937-7-21 11559 Tuolumne n Hetch Hetchy; Sierra Nevada, Yosemite National Park, Miguel Meadows Comment
  JEPS19313  Mimulus leptaleus Herbert L. Mason Jul 7 1939-Jul 8 1958 12157 Nevada 3 mi w Donner Summit 2072 Comment
  UC1191131  Mimulus microphyllus Herbert L. Mason 1953-5-5 14519 Colusa 0.25 above junction of Little Stoney Creek and Trout Creek (at sharp bend in road); Little Stoney Creek drainage Comment
  UC672534  Mimulus microphyllus H. L. Mason 1923-7-13 593 Tuolumne Hog Ranch Mather Comment
  UC1039602  Mimulus moniliformis Herbert L. Mason 1940-7-25 12336 Alpine hills n Kit Carson Pass 2682 Comment
  UC1111595  Mimulus moniliformis Herbert L. Mason 1941-7-7 12507 Madera just s Givens Lake trail junction; Sierra Nevada, Yosemite National Park Comment
  UC581162  Mimulus palmeri H. L. Mason 1935-3-29 8210 Kern Red Rock Canyon Mojave Desert Comment
  UC1106319  Mimulus primuloides Herbert L. Mason, B. Fuller, and H. Whisler 1958-6-29 12 Nevada one mi w University of California Trout Laboratory (12 mi n of Truckee, peat meadow back of stream); Sierra Nevada, Sage Hen Creek 1981 Comment
  UC672581  Mimulus pulchellus H. L. Mason 1925-6-27 2114 Tuolumne Hog Ranch Mather Comment
  UC1138207  Mimulus rupicola Herbert L. Mason 1940-3-22 12235 Inyo Titus Canyon Death Valley National Monument, Grapevine Mountains Comment
  JEPS19554  Mimulus suksdorfii Herbert L. Mason 1941-7-14 12524 Madera nw Merced Peak (slopes about Ottoway Lake. headwters of Illilouette Creek); Yosemite National Park, Ottoway Creek drainage 2971 Comment
  UC1039603  Mimulus tilingii Herbert L. Mason 1940-7-25 12332 El Dorado 10.5 mi s Lake Tahoe (e El Dorado Co.); Grass Lake 2377 Comment
  UC1039619  Mimulus tilingii Herbert L. Mason 1940-7-25 12337 Alpine hills n Kit Carson Peak 2682 Comment
  JEPS121  Mimulus torreyi H. L. Mason 1923-7-14 594 Tuolumne Mather Comment
  UC672533  Mimulus torreyi H. L. Mason 1923-7-14 594 Tuolumne Mather Comment
  UC769970  Mimulus tricolor Herbert L. Mason 1934-3-25 7943 Sacramento Keithly Ranch Sacramento Valley, Rio Linda Comment
  UC936205  Minuartia nuttallii subsp. gracilis H. L. Mason 1936-7-23 11304 Tuolumne Mount Conness Yosemite National Park Comment
  UC936172  Minuartia obtusiloba Herbert L. Mason 1936-7-24 11320 Tuolumne White Mountain Yosemite National Park, Conness Range. Comment
  UC936206  Minuartia obtusiloba H. L. Mason 1936-7-28 11424 a Mono Mount Dana Plateau. Comment
  UC1081520  Mitella breweri Herbert L. Mason 1936-7-7 11163 Mariposa Hetch Hetchy Trail w Dark Hole; Sierra Nevada, Yosemite National Park, Research Reserve 2438 Comment
  CAS-BOT-BC435102  Mollugo verticillata Herbert L. Mason 1946-7-27 12953 Lake Clear Lake, 2-3 miles north of Lakeport Comment
  UCD125244  Monardella sinuata subsp. nigrescens Herbert Mason; Annetta Carter 1938-5-18 1417 Marin Point Reyes Peninsula, 12.5 miles from Inverness. Comment
  UC634871  Monardella undulata H. L. Mason 1923-6-15 408 Santa Barbara Harris Grade La Purisima Ridge Comment
  UC965638  Monolepis nuttalliana Herbert L. Mason 1952-7-19 14406 Nevada meadow opposite U.C. Trout Lab. (Sage Hen Creek); Sierra Nevada, Sage Hen Creek 1981 Comment
  JEPS35215  Monolopia stricta H. L. Mason 1932-4-3 b Kern 5 mi e Lost Hills Comment
  UC672207  Monoptilon bellioides H. L. Mason 1928-3-10 4245 Riverside road from Indio to Palm Springs Comment
  UC581110  Monoptilon bellioides H. L. Mason 1934-3-28 8020 Inyo above Panamint Valley (w slope of Panamints); Panamint Mts. Comment
  CAS-BOT-BC444617  Montia chamissoi Herbert L. Mason 1936-7-12 11219 Mariposa Sierra Nevada, Yosemite National Park. Peregoy Meadow, Glacier Point road 2255 Comment
  CAS-BOT-BC445030  Montia fontana Herbert L. Mason 1940-7-6 12320 Tuolumne Sierra Nevada, Yosemite National Park. Miguel Meadow, west of Hetch Hetchy Dam 1584 Comment
  UC1076529  Montia linearis Herbert L. Mason 1936-4-11 11059 Calaveras Creek s of Sheep Ranch (San Antonio Creek); San Antonio Creek Comment
  UC635320  Montia linearis H. L. Mason 1924-6-18 1052 Plumas n of Graeagle Comment
  A343901  Morella californica H. L. Mason 1928-7-11 4893 Unknown along coast; canyon two miles north of Fort Ross Comment
  CAS-BOT-BC109004  Mucronea californica H. L. Mason 1923-6-23 553 Monterey Carmel River, ten miles above Carmel. Comment
  CAS-BOT-BC109005  Mucronea californica H. L. Mason 1923-6-23 553 Monterey Carmel River, ten miles above Carmel. Comment
  GH364715  Mucronea californica H. L. Mason 1923-6-23 544 Unknown Carmel River, ten miles above Carmel Comment
  UC635072  Mucronea californica Herbert L. Mason 1923-6-23 544 Monterey 10 mi above Carmel; Carmel River Comment
  UCD86551  Muhlenbergia asperifolia H. L. Mason 1936-8-1 11493 Mono Mono Lake. Comment
  CAS-BOT-BC247569  Muhlenbergia asperifolia Herbert Louis Mason 1947-8-15 13542 Modoc Mouth of Crane Creek on Willow Ranch. Comment
  UC1111013  Muhlenbergia richardsonis Herbert L. Mason 1933-9-2 7268 Amador Silver Lake Comment
  UC1111012  Muhlenbergia rigens Herbert L. Mason 1930-10-25 5746 Monterey Headwaters of the Arroyo Seco Santa Lucia Mountains Comment
  UC1076195  Muilla coronata Herbert L. Mason 1938-4-15 11727 San Bernardino two mi n Kramer; Mohave Desert Comment
  UC1076544  Myosotis discolor Herbert L. Mason 1946-5-19 12777 Mendocino Cleone Lake n. of Fort Bragg; Cleone Lake Comment
  SEINET5535989 Image available Myosotis micrantha Herbert L. Mason 1946-1 12777 Mendocino Cleone Lake; N of Fort Bragg Comment
  CAS-BOT-BC392263  Myosurus apetalus Herbert L. Mason 1953-7-8 14559 Plumas Six miles southeast of Beckwourth on road from Beckwourth to Loyalton across valley 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
  UCD96285  Myosurus apetalus Herbert L. Mason 1953-6-16 14551 Sierra Sierra County. One mile south of Beckwourth Buttes. Comment
  CAS-BOT-BC83277  Myosurus minimus Herbert L. Mason 1953-4-5 14509 Colusa Three miles east of Maxwell. Comment
  CAS-BOT-BC83286  Myosurus minimus H. L. Mason 1932-3-20 6854 Contra Costa Briones road. Comment
  CAS-BOT-BC83291  Myosurus minimus Herbert L. Mason 1952-4-26 14268 Contra Costa 3.5 miles south of Byron. Comment
  CAS-BOT-BC83292  Myosurus minimus Herbert L. Mason 1952-4-26 14269 Contra Costa 3.5 miles south of Byron. Comment
  CAS-BOT-BC83293  Myosurus minimus Herbert L. Mason 1952-4-26 14269 Contra Costa 3.5 miles south of Byron. Comment
  UC1101337  Myosurus minimus Herbert L. Mason 1952-4-26 14274 Stanislaus 3 mi e of the San Joaquin River (Hilmar Road near Crows Landing Road); Hilmar Road Comment
  UC1101341  Myosurus minimus Herbert L. Mason 1952-5-18 14288 Stanislaus on Hilmar Road e of San Joaquin River (about 1 mi from junction with 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
  UC1101345  Myosurus minimus Herbert L. Mason 1953-4-4 14505 Lake playa n of Lower Lake (Mannings Flat); Mannings Flat Comment
  UC1738078  Myosurus minimus H. L. Mason 1956-5-24 14289 A-2 Stanislaus 6 mi NE of Crows Landing ( at intersection of Hilmar and Morgan Ave., near abandoned gas well.) Comment
  UC1738084  Myosurus minimus H. L. Mason 1957-3-15 14268 B-4 Contra Costa 3 mi S of Byron ( on road to Herdlyn) Comment
  UC1738086  Myosurus minimus H. L. Mason 1957-3-15 14268 B-2 Contra Costa 3 mi S of Byron ( on road to Herdlyn) Comment
  UC634957  Myosurus minimus H. L. Mason 1931-4-26 5861 Monterey Pajaro Hills Comment
  UC634962  Myosurus minimus H. L. Mason 1931-3-26 Alameda s en of Grizzly Peak; Berkeley Hills Comment
  CAS-BOT-BC83290  Myosurus minimus Herbert L. Mason 1952-4-14 14264 Contra Costa 3.5 miles south of Byron. Comment
  JEPS9750  Myosurus minimus H. L. Mason 1931-3-26 Alameda n of Fish Ranch (a mile in soft chaparrral on the s end of Grizzly Peak ridge); Berkelley Hills Comment
  POM312434  Myosurus minimus H. L. Mason 1953-4-4 14504 Lake Stalked, spike tapering. On obsidian rubble, Playa north of Little Lake, Mannings Flat 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
  POM312436  Myosurus minimus subsp. apus H. L. Mason 1953-4-5 14510 -a Colusa 3 miles east of Maxwell Comment
  UC1101335  Myosurus minimus subsp. apus Herbert L. Mason 1952-4-26 14275 b Stanislaus 3 mi e of San Joaquin River (Hilmar Road near Crows Landing Road); Hilmar Road Comment
  UC1101330  Myosurus sessilis Herbert L. Mason 1952-4-14 14263 Contra Costa 3.5 mi s of Byron Comment
  UC1101331  Myosurus sessilis Herbert L. Mason 1952-4-26 14269 Contra Costa 3.5 mi s of Byron Comment
  UC1101332  Myosurus sessilis Herbert L. Mason 1952-4-26 14270 Contra Costa 3.5 mi s of Byron Comment
  UC1101333  Myosurus sessilis Herbert L. Mason 1952-4-14 14264 Contra Costa 3.5 mi s of Byron Comment
  POM312428  Myosurus sessilis H. L. Mason 1952-4-26 14270 Contra Costa Vernal Pool, 3.5 miles S of Byron Comment
  UC672612  Myrica californica Herbert L. Mason 1928-10-21 4997 Mendocino Fort Bragg 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
  UC1178886  Myriophyllum hippuroides Herbert L. Mason 1938-8-26 12074 San Joaquin Trappers Slough, Roberts Island 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
  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
  CAS-BOT-BC456183  Najas 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
  UCD138158  Najas guadalupensis subsp. guadalupensis Herbert L. Mason; Verne Grant 1946-8-15 13053 Butte #833 Irrigation Ditch, near caretaker's house, Greylodge Game Refuge, Butte Sink. Comment
  UC1220405  Najas marina Herbert L. Mason 1963-4-10 15204 Inyo Death Valley National Monument, Furnace Creek Ranch Furnace Creek Ranch Furnace Creek Ranch; Death Valley National Monument, Furnace Creek Ranch Comment
  UC672365  Nama demissa var. demissa Herbert L. Mason 1926-4-26 3002 Los Angeles Little Rock 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
  UC791045  Nama rothrockii Herbert L. Mason 1948-9-3 13632 Inyo Onion Valley road 2651 Comment
  UCD139966  Narthecium californicum Herbert L. Mason 1950-7-15 14053 Trinity Scott Mountain. Comment
  CAS-BOT-BC516033  Narthecium californicum Herbert L. Mason 1950-7-15 14053 Trinity Summit of grade, Scott Mountain Comment
  UC912631  Nassella lepida Herbert L. Mason 1932-4-28 7052 Alameda Laundry farm Oakland Hills Comment
  SEINET190361  Navarretia atractyloides Herbert L. Mason 1941-7-21 12471 Santa Barbara Mesa south of Casmalia Comment
  UC1178931  Navarretia atractyloides Herbert L. Mason 1953-6-8 14530 Lake 1 mi n Lower Lake Comment
  UC1199830  Navarretia atractyloides Herbert L. Mason 1946-6-8 12844 Santa Barbara s side Big Pine Mountain (Bluff Camp) Comment
  UC907795  Navarretia atractyloides Herbert L. Mason 1926-6-6 3374 Santa Cruz near Felton Comment
  UC909051  Navarretia atractyloides Herbert L. Mason 1927-7-27 3978 Santa Cruz n w end Big Basin (Boulder Creek road) Comment
  UC909056  Navarretia atractyloides Herbert L. Mason 1927-7-31 3998 Santa Cruz hills s Mt. Herman Comment
  UC700272 Image available Navarretia bakeri H. L. Mason 1945-6-28 12599 Lake 1.5 mi sw Lower Lake (in vernal pool); ; 1.5 mi. SW of Lower Lake, Lake Co. Comment
  UC1178897  Navarretia breweri Herbert L. Mason 1947-7-8 13306 Modoc Cedar Pass, summit of Warner Range Warner Range 1920 Comment
  UC1186140  Navarretia capillaris Herbert L. Mason 1938-7-29 12049 Tuolumne Saurian Crest northern Yosemite National Park, Saurian Crest (northern part of Yosemite National Park) Comment
  CAS-BOT-BC230260  Navarretia cotulifolia Herbert L. Mason 1934-4-30 8111 Napa Tributary of Putah Creek, Pope Valley Comment
  SEINET196212  Navarretia cotulifolia Herbert L. Mason 1934-4-30 8111 Napa Tributary of Putah Creek, Pope Valley Comment
  UC963811  Navarretia cotulifolia H. L. Mason 1932-4-17 6954 Santa Clara se of Gilroy (Miller and Lux ranch) Comment
  SEINET196215  Navarretia divaricata Herbert L. Mason 1941-7-12 12480 a Tuolumne Yosemite National Park; Miguel Meadows, Yosemite National Park 1890 Comment
  UC1186142  Navarretia divaricata Herbert L. Mason 1938-7-6 11860 Tuolumne e of Miguel Meadow (dry ridge between Swamp Lake Miguel Meadow); Sierra Nevada, Yosemite National Park, Swamp Lake 1584 Comment
  UC908395  Navarretia divaricata Herbert L. Mason 1946-6-8 12852 Santa Barbara Big Pine Mountain, summit of road San Rafael Mountains Comment
  UC9637755  Navarretia divaricata Herbert L. Mason Jul 7 1939-Jul 8 1939 12150 Nevada 3 mi w Donner Summit 2072 Comment
  UCD39813  Navarretia divaricata Herbert L. Mason 1946-6-8 12852 Santa Barbara San Rafael Mountains, Big Pine Mountain, summit of road. Comment
  SEINET197695  Navarretia divaricata Herbert L. Mason 1952-7-16 14360 Nevada One mile west of the University of California Trout Laboratory, Sage Hen Creek 1981 Comment
  SEINET8729361 Image available Navarretia divaricata Herbert L. Mason 1941-1 12480 a Tuolumne Miguel Meadows, Yosemite National Park. 1890 Comment
  UC963777  Navarretia divaricata Herbert L. Mason 1926-5-31 3353 Calaveras 1.2 mi sw Calaveras Big Trees (on Road) Comment
  UC1056978  Navarretia divaricata subsp. divaricata Herbert L. Mason 1936-7-12 11231 Mariposa Peregoy Meadow, Glacier Point road Sierra Nevada, Yosemite National Park 2255 Comment
  UC665600  Navarretia hamata subsp. parviloba Herbert L. Mason 1941-7-1 12468 San Luis Obispo n end Nipomo mesa; Nipomo 76 Comment
  CAS-BOT-BC230308  Navarretia heterandra Herbert L. Mason 1946-5-30 12791 Lake Locomono Creek near Middletown Comment
  UC908127  Navarretia heterandra Herbert L. Mason 1946-5-30 12791 Lake near Middletown; Locomono Creek Comment
  UC908165  Navarretia intertexta Herbert L. Mason 1946-5-30 12798 Lake 3 mi e Middletown Comment
  UC908178  Navarretia intertexta Herbert L. Mason 1923-7-15 603 Tuolumne 3 mi w Mather; Salt Log 1371 Comment
  UC908880  Navarretia intertexta Herbert L. Mason 1946-6-8 12856 Santa Barbara Big Pine Mountain, summit of road San Rafael Mountains Comment
  UCD48474  Navarretia intertexta H. L. Mason 1945-6-28 12594 Lake 3 miles east of Middletown, Lake County, California. Comment
  UC908428  Navarretia intertexta Herbert L. Mason 1945-6-29 12613 Lake wash of Kelsey Creek Kelsey Creek Comment
  UCD48473  Navarretia intertexta Herbert L. Mason 1940-5-21 12295 Sonoma Head of Maacama Creek, Knights Valley, Sonoma County. Comment
  UCD48479  Navarretia intertexta H. L. Mason 1945-5-12 12580 Lake 3 miles north of Lower Lake, beds of vernal pools, Lake County, California. Comment
  UC1106906  Navarretia intertexta subsp. propinqua Herbert L. Mason 1946-7-13 13449 Modoc w end Fandango Pass (near Goose Lake, on road to Fort Bidwell) Comment
  UC965517  Navarretia intertexta subsp. propinqua Herbert L. Mason 1952-7-16 14362 Nevada 1 mi w University of California Trout Laboratory; Sierra Nevada, Sage Hen Creek 1981 Comment
  UC965525  Navarretia intertexta subsp. propinqua Herbert L. Mason 1952-7-17 14377 Sierra between Sierraville and Loyalton; Sierra Nevada, Sierra Valley 1524 Comment
  UC965526  Navarretia intertexta subsp. propinqua Herbert L. Mason 1952-7-17 14376 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
  SEINET197686  Navarretia jepsonii Herbert L. Mason 1945-6-28 12595 Lake Just below bridges east of Middletown. Comment
  UC908621  Navarretia jepsonii Herbert L. Mason 1946-5-30 12814 Colusa about 1 mi e Lake County line (w Colusa County); Leesville Grade 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
  GH403744  Navarretia linearifolia H. L. Mason 1950-7-15 14049 Unknown In wet bog: Summit of grade, Scott Mountain Comment
  UC908262  Navarretia linearifolia subsp. pinnatisecta Herbert L. Mason 1945-6-29 12612 Lake near Kelseyville; wash of Kelsey Creek, near Kelseyville Comment
  UC908641  Navarretia mellita Herbert L. Mason 1945-6-28 12609 Lake 2.5 mi s Kelseyville Comment
  CAS-BOT-BC213907  Navarretia pauciflora H. L. Mason 1945-5-12 12583 Lake 5 miles north of Lower Lake 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
  UCD48614  Navarretia prostrata Herbert L. Mason 1952-5-18 14292 Merced Santa Fe grade east of Los Banos, San Joaquin Valley, Merced County. Comment
  CAS-BOT-BC232652  Navarretia pubescens Herbert L. Mason 1935-5-30 8330 Lake Between Lower Lake and Knoxville Mine Comment
  SEINET196697  Navarretia pubescens Herbert L. Mason 1935-5-30 8330 Lake Between Lower Lake and Knoxville Mine. Comment
  SEINET196694  Navarretia tagetina Herbert L. Mason 1934-4-30 8110 Napa Tributary of Putah Creek, Pope Valley. Comment
  UC908385  Navarretia tagetina Herbert L. Mason 1945-6-28 12597 Lake 3 mi e Middletown Comment
  UC1191853  Navarretia viscidula Herbert L. Mason 1950-6-9 14803 Lake Highland Spring Road Comment
  UC908101  Navarretia viscidula H. L. Mason 1926-5-30 3340 Amador hills s of Ione; Sierra Nevada Comment
  UC635583  Nemacladus interior H. L. Mason 1923-7-12 577 Tuolumne Mather; Sierra Nevada Mountains, Yosemite National Park Comment
  SEINET10461179  Nemacladus interior Mason 1936-7-11 Mason 11198 Mariposa Wawona 1250 Comment
  SEINET10461220  Nemacladus interior Mason 1928-6-28 Mason 4866 Mariposa Wawona Comment
  SEINET10461225  Nemacladus interior Mason 1938-7-6 Mason 11859 Tuolumne Dry ridge between Swamp Lake and Miguel Meadow 1646 Comment
  SEINET10458402  Nemacladus longiflorus Mason 1926-4-30 Mason 3145 San Diego Oak Grove 853 Comment
  SEINET10972607  Nemacladus longiflorus Mason 1926-4-30 Mason 3177 a San Diego Oak Grove Comment
  UC1051455  Nemacladus orientalis Herbert L. Mason 1952-4-7 14211 Riverside Palm Canyon; Palms Springs Comment
  UC635593  Nemacladus pinnatifidus H. L. Mason April 1926 3177 San Diego Oak Grove Comment
  SEINET10461043  Nemacladus ramosissimus Mason 1935-4-30 Mason 8281 b San Bernardino Poison Canyon Comment
  SEINET3815165 Image available Nemacladus rigidus Herbert L. Mason 1935-5-30 10000 Napa Four miles N of Knoxville Mines Comment
  UC635589  Nemacladus secundiflorus var. secundiflorus H. L. Mason 1927-5-16 3736 San Luis Obispo Atascadero Comment
  POM247272  Nemophila maculata H. L. Mason 1936-4-10 11053 Calaveras Road from Altaville to Murphy s, 0.25 miles east of Angel s Camp. Comment
  UC1540447  Nemophila maculata H. L. Mason 1936-4-10 11053 Calaveras one-fourth mi e Angel's Camp (road from Altaville to Murphy's); e of Angel's Camp Comment
  UC588131  Nemophila maculata H. L. Mason 1936-4-10 11053 Calaveras one-fourth mi e Angel's Camp (road from Altaville to Murphy's); e of Angel's Camp Comment
  UC592189  Nemophila menziesii H. L. Mason 1925-3-7 1287 Alameda bluff above stream junction one-half mi sw Sunol; sw of Sunol Comment
  UC595053  Nemophila pedunculata H. L. Mason 1938-5-1 11745 Lake Barlett Springs Bartlett Springs Comment
  UC595054  Nemophila pedunculata H. L. Mason 1938-5-1 11744 Lake Barlett Springs Bartlett Springs Comment
  UC672359  Nemophila pedunculata Herbert L. Mason 1926-3-21 2773 Lake St. Helena Creek St. Helena Creek (along streams) Comment
  UC592136  Nemophila pulchella var. gracilis H. L. Mason 1929-3-24 5102 Madera at junction of Yosemite Road e Madera (between Bates Station and O'Neals); e of Madera at jct of Yosemite Road Comment
  UC632809  Nemophila spatulata H. L. Mason 1936-7-12 11225 Mariposa Peregoy Meadow Yosemite National Park, Glacier Point Road, Peregoy Meadow (Glacier Point road, Yosemite National Park) 2255 Comment
  YM-YOSE65374  Nemophila spatulata Harry L. Mason 1938-7-11 11941 Tuolumne MIGUEL MEADOW 1584 Comment
  UC570705  Nicotiana clevelandii H. L. Mason 1928-3-10 4211 Riverside Hidden Springs; Coachella Mountains Comment
  UC570708  Nicotiana quadrivalvis Herbert L. Mason 1926-4-30 3147 San Diego Oak Grove Palomar Mt. (base of Palomar Mt) Comment
  UC570711  Nicotiana quadrivalvis H. L. Mason 1926-1-1 2582 Lake grade between Elk Mountain and Upper Lake Comment
  UC1179022  Nolina parryi Herbert L. Mason 1935-4-30 8349 Kern Walker Pass 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
  YM-YOSE65037  Nuphar polysepala H. L. Mason 1938-7-10 11927 Tuolumne SWAMP LAKE RESEARCH RESERVE. SOUTH ISLAND Comment
  CAS-BOT-BC140429  Oemleria cerasiformis H. L. Mason 1921-7-14 s.n. San Mateo Pescadero Creek Comment
  UC1093960  Oemleria cerasiformis Herbert L. Mason 1936-3-6 10987 San Luis Obispo 11 mi w San Luis Obispo (Pecho hills) Comment
  UC555685  Oemleria cerasiformis H. L. Mason 1923-6-22 533 San Luis Obispo Summit Cuesta Grade Comment
  UC1191953  Oenanthe sarmentosa Herbert L. Mason 1946-6-9 12870 San Luis Obispo between mouth of Santa Maria R. and Oceano (Dune Lakes); Dune Lakes Comment
  CAS-BOT-BC427455  Oligomeris linifolia H. L. Mason 1926-4-25 2905 Orange Five miles south of Laguna Beach Comment
  UC1076288  Orobanche fasciculata Herbert L. Mason 1927-6-15 3784 San Bernardino San Gabriel Mountains. Mount San Antonio. Comment
  UC634780  Orogenia fusiformis H. L. Mason 1933-5-28 7237 Placer Lower Truckee R. Meadows Comment
  CAS-BOT-BC355779  Osmadenia tenella Herbert L. Mason 1925-4-25 2903 Orange 5 miles south of Laguna Comment
  UC965548  Osmorhiza occidentalis Herbert L. Mason 1952-7-19 14427 Nevada meadow opposite University of California Trout Laboratory; Sage Hen Creek 1981 Comment
  UC592175  Oxypolis occidentalis H. L. Mason 1923-7-25 645 Tuolumne Lodge Meadow Sierra Nevada Mountains, Yosemite National Park, Mather Comment
  UC641798  Oxyria digyna H. L. Mason 1936-7-23 11292 Tuolumne alpine slopes Mount Conness; Sierra Nevada, slopes of Mount Conness Comment
  UC912545  Packera eurycephala var. eurycephala Herbert L. Mason 1934-4-30 8107 Napa 7 mi above Monticello; Pope Canyon Comment
  UC912546  Packera eurycephala var. eurycephala Herbert L. Mason 1934-4-30 8108 Napa Pope Canyon Comment
  UC912483  Packera greenei Herbert L. Mason 1930-6-1 5682 Lake St. Helena Creek, slopes of Mount St. Helena Mount St. Helena Comment
  UC635426  Paeonia californica H. L. Mason 1923-6-15 403 Santa Barbara Harris Grade La Purisma Range Comment
  UC635428  Paeonia californica H. L. Mason 1926-4-30 3149 San Diego Oak Grove 853 Comment
  UC1108826  Panicum acuminatum var. acuminatum Herbert L. Mason 1938-7-22 11968 Tuolumne n Hetch Hetchy Valley (Vernon Trail Lake); Sierra Nevada, Yosemite National Park 1981 Comment
  UC1101587  Panicum capillare Herbert L. Mason 1946-7-27 12952 Lake 2-3 mi n Lakeport (Clear Lake); Clear Lake Comment
  SACT001636  Panicum huachucae Herbert Mason 1949-8-19 Merced Sandy river bottom. Comment
  UC1111579  Parietaria hespera var. californica Herbert L. Mason 1929-5-5 5260 Contra Costa Nortonville Comment
  UC1027193  Parvisedum pentandrum Herbert L. Mason 1953-5-4 Colusa Little Stony Creek Road 0.25 mi above junction of Little Stony Creek and Trout Creek (Inner North Coast Ranges); , Little Stony Creek Road 609 Comment
  UC571849  Parvisedum pumilum H. L. Mason 1935-5-5 3645 Napa 3 mi s of Napa City Comment
  GH378519  Paxistima myrsinites H. L. Mason 1929-5-18 5329 Unknown hills along Shasta Creek Canyon Comment
  UC635621  Paxistima myrsinites H. L. Mason 1929-5-18 5329 Siskiyou hills along Shasta Creek Canyon Shasta Creek Canyon Comment
  UC573064  Pectocarya penicillata H. L. Mason 5133 Contra Costa 2 mi above Clayton (Marsh Creek Rd) Comment
  CAS-BOT-BC69293  Pellaea andromedifolia H. L. Mason; H. A. Borthwick 1921-3-20 s.n. Santa Clara Guadalupe Canyon Comment
  UC672629  Pellaea mucronata var. californica Herbert L. Mason 1927-6-15 3778 San Bernardino Mt Baldy; San Gabriel Mts 2590 Comment
  UC565585  Penstemon centranthifolius H. L. Mason 1926-4-27 3032 Los Angeles Rock Creek San Gabriel Mountains, Rock Creek Comment
  UC565586  Penstemon heterophyllus H. L. Mason 1929-10-12 5482 San Luis Obispo four and three-tenths mi w Atascadero; Atascadero Creek, w of Atascadero Comment
  UC565591  Penstemon newberryi var. newberryi Herbert L. Mason 1923-7-21 631 Tuolumne Hetch Hetchy Valley - Canyon Ranch Comment
  UC565598  Penstemon newberryi var. newberryi Herbert L. Mason 1924-6-18 1065 Plumas road between Graeagle and Gold Lake; road between Graeagle and Gold Lake Comment
  JEPS11384  Penstemon speciosus H. L. Mason 1924-6-26 1045 Plumas Blairsden Comment
  JEPS17274  Pentachaeta aeolica H. L. Mason and J. R. Sweeney 1957-4-19 San Benito slope near mouth mouth of Clear Creek; upper end of Hernandez Valley 762 Comment
  UC672241  Pentachaeta alsinoides Herbert L. Mason 1931-4-25 5825 Alameda road between Marsh Creek and Livermore Comment
  UC912264  Pentachaeta exilis Herbert L. Mason 1933-4-21 7192 Santa Clara lower slopes Mount Hamilton Comment
  UC566849  Perideridia californica Herbert L. Mason 1932-4-17 6963 Santa Clara Pacheco Pass Road; e base Comment
  CAS-BOT-BC413675  Persicaria amphibia Herbert L. Mason 1937-7-22 11616 Tuolumne Swamp Lakes, just west of Hetch Hetchy Dam and south of MIguel Meadows, Yosemite National Park 1584 Comment
  CAS-BOT-BC418861  Persicaria hydropiperoides Herbert L. Mason; Verne Grant 1946-8-14 13027 Butte Butte Sink. On Sacramento Outing Club Comment
  CAS-BOT-BC419003  Persicaria lapathifolia Herbert L. Mason 1930-8-1 5718 Lake Clear Lake Comment
  CAS-BOT-BC419350  Persicaria punctata Herbert L. Mason; S. Galen Smith 1948-8-9 8301 Merced 1 mile west of Los Banos Comment
  UC566779  Petunia parviflora H. L. Mason 1929-10-13 5507 Monterey Bradley Salinas River (bridge over Salinas River) Comment
  UC672429  Phacelia bolanderi Herbert L. Mason 1928-8-26 4935 Mendocino 1 mi above Fort Bragg; Pudding Creek Comment
  UC1111530  Phacelia breweri Herbert L. Mason 1957-5-11 14736 San Benito 4-5 mi e Hernandez (entrance to canyon); Clear Creek Canyon Comment
  UC604429  Phacelia breweri H. L. Mason 1938-5-3 11750 Contra Costa trail between Juniper Camp and Deer Flat; Mount Diablo 990 Comment
  UC672338  Phacelia breweri Herbert L. Mason 1933-4-21 7205 Santa Clara n Packard Ridge (headwaters of creek); Alameda Creek Comment
  UC672400  Phacelia cicutaria var. cicutaria Herbert L. Mason 1930-4-1 5555 Calaveras hills w San Andreas Comment
  UC672399  Phacelia cicutaria var. hispida Herbert L. Mason 1926-4-30 3136 Riverside 2 mi s Temecula Comment
  SFV16119  Phacelia ciliata S. Mason, J. Artero 1995-4-1 49 San Luis Obispo Carrizo Plain Carrizo Plain Natural Area. Off Simler Road, 0.7 miles from Soda Lake Road. Saline, alkaline area near Soda Lake. 610 Comment
  UC672410  Phacelia ciliata var. ciliata Herbert L. Mason 1929-3-31 5139 Contra Costa Briones Road Hills northeast of Mount Diablo Comment
  UC672412  Phacelia ciliata var. ciliata H. L. Mason 1932-3-19 6830 San Joaquin 2 mi e Midway Comment
  UC672402  Phacelia crenulata var. ambigua Herbert L. Mason 1928-3-10 4226 Riverside Hidden Spring Canyon Colorado Desert, Coachella Mountains Comment
  UC1178992  Phacelia curvipes Herbert L. Mason 1935-4-30 8354 Kern Walker Pass. Comment
  UC1076047  Phacelia dalesiana Herbert L. Mason 1947-5-17 14773 Siskiyou Trinity-Siskiyou county line Scott Mountain divide Comment
Read comments
Jul 5 2017
  UC672423  Phacelia distans Herbert L. Mason 1928-3-11 4239 Riverside Desert Flats near Indio; Colorado Desert Comment
  UC672424  Phacelia distans Herbert L. Mason 1926-3-14 2724 Napa sw slope Mt. St. Helena Comment
  UC672331  Phacelia divaricata Herbert L. Mason 1925-4-12 1328 Marin Pipe line trail Mt. Tamalpais Comment
  SFV16104  Phacelia fremontii S. Mason, et al. 1995-4-23 51 Los Angeles Mojave Desert Little Rock. Mount Emma Road, 0.8 miles above Fort Tejon Road on northern foothills of Transverse Range. 915 Comment
  UCSB70475  Phacelia fremontii Mason, Herbert; Mason, Renee; Robbins, G. 1956-3-29 Kern Near Schneider Piute Ranch, along road between Loraine and Walker Basin, 6 mi. n. of Sand Canon Store and 5 mi. s. of Piute Mtn. Lookout junction 1097 Comment
  UC1191850  Phacelia humilis Herbert L. Mason 1948-7-18 13620 Modoc Cedar Pass Warner Mountains Comment
  UC1093946  Phacelia hydrophylloides Herbert L. Mason 1941-7-14 12517 Madera Ottoway Park Sierra Nevada, Yosemite National Park 2987 Comment
  UC672384  Phacelia imbricata Herbert L. Mason 1928-4-26 4388 Contra Costa slopes to n of Lake Temescal; Berkeley Hills Comment
  UC753517  Phacelia imbricata Herbert L. Mason 1946-6-7 12820 Santa Barbara Escondido Spring Santa Ynez Range 609 Comment
  UC936144  Phacelia longipes Herbert L. Mason 1949-4-25 14013 Ventura 7 mi ne Wheelers Hot Springs Comment
  UC672347  Phacelia malvifolia Herbert L. Mason 1927-7-30 3984 Monterey Cypress Point Comment
  UC672393  Phacelia minor Herbert L. Mason 1926-4-28 3102 San Bernardino Box S Ranch Mohave Desert Comment
  UC1051496  Phacelia pachyphylla Herbert L. Mason 1952-4-11 14248 San Bernardino just e Daggett; Black Lava Bed Comment
  UC1076418  Phacelia pachyphylla Herbert L. Mason 1955-4-30 8280 Inyo Poison Canyon Comment
  UC672389  Phacelia parryi Herbert L. Mason 1926-4-25 2911 Orange 5 mi s Laguna Comment
  GH401012  Phacelia phacelioides H. L. Mason 1938-5-3 11749 Unknown Trail between Juniper Camp and Deer Flat, Mount Diablo Comment
  UC1077100  Phacelia racemosa Herbert L. Mason 1938-7-17 11958 Mariposa Big Oak Flat Rd Sierra Nevada, Yosemite National Park, Tamarack Flat 1950 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
  UC1178995  Phacelia ramosissima var. subglabra Herbert L. Mason 1937-7-26 14828 Tuolumne n Hetch Hetchy Dam; Yosemite National Park, Mahan Peak 2438 Comment
  SD46100  Phacelia rotundifolia Herbert L. Mason 1954-4-11 14254 San Bernardino Black Lavas north of Pisgah Crater, in crevices of lava. Comment
  UCD120692  Phacelia suaveolens Herbert L. Mason 1940-5-10 14805 Lake Obsidian pond, north of Lower Lake. Comment
  UCD120733  Phacelia tanacetifolia Steve Mason; Joey Artero 1993-4-24 15 San Luis Obispo San Luis Obispo County: Carrizo Plain Natural Area, NE side road off Elkhorn Rd., 1.2 mi. S of Elkhorn and Simmler Roads' junction, up road on left roadside past washing machine. 640 Comment
  UC764435  Phacelia thermalis Herbert L. Mason 1947-8-9 13481 Modoc Porcupine Valley, on road to Antelope Reservoir Comment
  CAS-BOT-BC250709  Phalaris paradoxa Herbert L. Mason 1940-5-3 12252 Fresno San Joaquin Valley. Lyon and Hoag Ranch, nine miles southeast 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
  SEINET197653 Image available Phalaris paradoxa H. L. Mason 1940-5-3 12252 Fresno San Joaquin Valley Lyon & Hoag Ranch 9 mi SE of S 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
  UC1100412  Phleum pratense Herbert L. Mason 1947-8-13 13537 Modoc n Canby (ne side of F reservoir); ne side of F reservoir Comment
  UC1100415  Phleum pratense Herbert L. Mason and Verne Grant 1947-7-9 13303 Lassen 5 mi e Bieber (irrigation ditch) Comment
  UC1186147  Phlox diffusa Herbert L. Mason 1938-7-25 12000 Tuolumne e base Mahan Peak; Sierra Nevada, Yosemite National Park, Deep Lake Comment
  UC1186132  Phlox douglasii subsp. rigida Herbert L. Mason 1926-5-30 3309 El Dorado hillslope back of Emerald Bay; Lake Tahoe Comment
  UC908029  Phlox gracilis Herbert L. Mason 1928-7-4 4869 Tuolumne Tuolumne Meadows Comment
  UC908391  Phlox gracilis Herbert L. Mason 1929-3-1 5013 Monterey 10 mi e Carmel Mission; Carmel River Comment
  UC1111010  Phlox gracilis Herbert L. Mason 1936-7-7 11165 Mariposa w of Dark Hole (n of Yosemite Valley, Research Reserve); Sierra Nevada, Yosemite National Park 2438 Comment
  UC908224  Phlox gracilis Herbert L. Mason 1926-3-22 2791 Napa between Calistoga and Petrified Forest Comment
  UC1186135  Phlox speciosa subsp. occidentalis Herbert L. Mason 1927-5-10 3729 Yuba near Dobbins Comment
  UC1039625  Pholisma arenarium Herbert L. Mason 1941-7-1 12469 San Luis Obispo sand hills s Oceano Comment
  UC592183  Pholistoma membranaceum H. L. Mason 1929-3-23 5080 Tulare 3 mi. above Springville (Middle Tule R.); Middle Tule R. Comment
  UC1039600  Phoradendron Herbert L. Mason 1923-6-17 474 Ventura Ojai Comment
  UC1039601  Phoradendron densum Herbert L. Mason 1926-1-2 2607 Napa Mt. St. Helena, Toll House Canyon Comment
  UC639128  Phoradendron densum H. L. Mason and L. Constance 1939-12-21 Napa on shoulder of Mt. St. Helena (on Middletown-Calistoga rd. at Lake Co. line) Comment
  UC1081525  Phoradendron pauciflorum Herbert L. Mason 1936-4-10 11046 Calaveras Calaveras Big Trees Comment
  CAS-BOT-BC250991  Phragmites australis Herbert L. Mason 1946-9-12 13123 San Joaquin Borden Highway halfway between Old River - Middle River Comment
  UC1191813  Phyla lanceolata Herbert L. Mason and Verne Grant 1946-8-14 13033 Butte Sacramento Outing Club Butte Sink (canal near big pond) Comment
  UC571045  Phyllodoce breweri H. L. Mason 1928-7-5 4876 Mono Tioga Mines Comment
  UC571046  Phyllodoce breweri H. L. Mason 1924-6-19 1074 Plumas Bear Lake Comment
  CAS-BOT-BC452067  Phyllospadix torreyi Herbert L. Mason 1927-11-27 4145 Santa Barbara Carpinteria Comment
  UC985937  Physalis lancifolia Herbert L. Mason 1945-9-19 12727 Sutter e side Butte Creek (West Butte Road) Comment
  UCD126761  Physalis lancifolia Herbert L. Mason 1945-9-19 12727 Sutter West Butte Road on the east side of Butte Creek. Comment
  UC555512  Physocarpus capitatus H. L. Mason Jun 1930 5642 Sonoma Gualala River, mouth Comment
  UC1061648  Picea sitchensis Herbert L. Mason Sept. 1930 Mendocino Fort Bragg Comment
  UC1083376  Pinus Herbert L. Mason 1941-3-27 12388 Santa Barbara summit of Harris Grade Purisima Ridge (Purisima Ridge, sw Santa Barbara County) Comment
  UC1191140  Pinus Herbert L. Mason 1953-7-21 14565 Mono e of Campito Mountains; White Mountains 2895 Comment
  POM264591  Pinus albicaulis H. L. Mason 1936-8-6 11519 Mono Hills between Saddlebag Lake and Conness Glacier. 3201 Comment
  RSA31091  Pinus albicaulis H. L. Mason 1936-8-6 11519 Mono Hills between Saddlebag Lake and Conness Glacier. 3201 Comment
  UC665719  Pinus albicaulis Herbert L. Mason 1936-8-6 11519 Mono hills between Saddlebag Lake and Conness Glacier; Sierra Nevada 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
  A357743  Pinus contorta H. L. Mason 1934-9-3 8148 Unknown Just north of the town of Point Arena, Mendocino County Comment
  GH357764  Pinus contorta H. L. Mason, N. T. Mirov & W. P. Stockwell 1948-6-9 2017 Unknown Two miles east of Mendocino City, Mendocino County 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
  UC1093915  Pinus contorta subsp. bolanderi Herbert L. Mason 1932-8-26 7166 Mendocino at Mendocino City; Pine Barrens Comment
  UC665720  Pinus contorta subsp. bolanderi Herbert L. Mason 1934-9-3 8146 Mendocino 3 mi e Mendocino City; White Plains Comment
  UC1076347  Pinus contorta subsp. murrayana Herbert L. Mason 1929-10-4 5476 Placer Placerville road summit Johnson Pass Comment
  POM264566  Pinus contorta var. contorta H. L. Mason 1934-9-3 8146 Mendocino White Plains, 3 miles east of Mendocino City Comment
  UC1061639  Pinus muricata Herbert L. Mason Marin Inverness Comment
  UC1083158  Pinus muricata Herbert L. Mason 1927-9-25 4097 Santa Barbara Buena Vista Canyon along roadway Santa Cruz Island, Buena Vista Canyon, Buena Vista Creek (in the forest of Buena Vista Creek) Comment
  UC1083374  Pinus muricata Herbert L. Mason 1941-3-27 12389 Santa Barbara summit Harris Grade; sw Santa Barbara County, Purisima Ridge, Harris Grade Comment
  UC573058  Plagiobothrys acanthocarpus H. L. Mason 1932-3-19 6828 San Joaquin 2 mi e Midway (Tracy highway) Comment
  UC573063  Plagiobothrys canescens H. L. Mason 1929-3-23 5084 Tulare 3 mi above Springville; Middle Tule River 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
  UC1191836  Plagiobothrys mollis Herbert L. Mason, Verne Grant 1947-7-10 13333 Modoc 2 mi e Alturas; Dorris Reservoir Comment
  CAS-BOT-BC58728  Plagiobothrys mollis var. mollis Herbert Louis Mason; Verne Grant 1947-7-12 13395 Modoc By Jones' Lane, off Hwy 395, several miles S of Alturas. Comment
  CAS-BOT-BC58796  Plagiobothrys mollis var. mollis Herbert Louis Mason; Verne Grant 1947-7-12 13407 Modoc W side of South Fork of Pit River Valley, SW of Alturas. Comment
  CAS-BOT-BC58753  Plagiobothrys scouleri Herbert Louis Mason; Verne Grant 1947-7-12 13408 Modoc W side of South Fork of Pit River Valley, SW of Alturas. Comment
  POM312568  Plagiobothrys scouleri var. hispidulus H. L. Mason, Verne Grant 1947-7-12 13408 Modoc West side of the South Fork of Pit River Valley, southwest of Alturas. Comment
  UC573079  Plagiobothrys stipitatus var. micranthus H. L. Mason 1929-3-31 5144 Contra Costa Briones Valley 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
  UC1191844  Plagiobothrys stipitatus var. micranthus Herbert L. Mason and Verne Grant 1947-7-12 13410 Modoc s of Alturas (w side of Pit River Valley); Pit River Valley Comment
  POM312370  Plantago halophila H. L. Mason 1945-8-24 12682 Lake East shore, Lower Lake. Comment
  UC1111008  Plantago patagonica Herbert L. Mason 1928-3-10 4175 Riverside Snow Creek Colorado Desert, Whitewater River Valley Comment
  UC1056426  Platanthera sparsiflora Herbert L. Mason 1936-7-7 11166 Mariposa w of Dark Hole (Research Reserve, Hetch Hetchy Trail); Sierra Nevada, Yosemite National Prk 2438 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-BC91875  Platystemon californicus H. L. Mason 1926-4-30 3134 Riverside Two miles south of Temecula. Comment
  UC912454  Plectritis ciliosa subsp. ciliosa Herbert L. Mason 1927-5-11 3731 Yuba near Dobbins 457 Comment
  UC912465  Plectritis macrocera H. L. Mason 1932-4-25 7006 Amador road Ione to Latrobe (Cosumnes River Bridge); Cosumnes River Bridge Comment
  UC635154  Pleuricospora fimbriolata H. L. Mason Jul 1930 5704 Calaveras Blue Creek, Sierra Nevada Mountains, near Hermit Springs Comment
  UC571025  Pluchea odorata var. odorata H. L. Mason 1929-9-9 5419 San Joaquin Holt Comment
  UC581130  Pluchea sericea H. L. Mason 1934-3-27 8030 Inyo Death Valley Comment
  UC1100399  Poa bulbosa Herbert L. Mason, Malcolm A. Nobs, and S. Galen Smith 1949-5-29 758 Lassen on Great Northern RR, Hwy 299 <Nubeiber> Comment
  UC912659  Poa douglasii Herbert L. Mason 1929-9-1 5404 Mendocino 4 mi n Fort Bragg Comment
  UCD91931  Poa pratensis H. L. Mason 1938-7-11 11932 Tuolumne Miguel Meadow, near Swamp Lake, northwest of Hetch-Hetchy. Yosemite National Park. Comment
  UC1106327  Poa pratensis subsp. pratensis Herbert L. Mason, B. Fuller, and H. Whisler 1958-7-13 25 Nevada 12 mi n Truckee (U.C. Trout Lab, Sage Hen Creek); Sierra Nevada 1981 Comment
  UC936197  Poa secunda subsp. juncifolia H. L. Mason 1932-4-1 6862 Los Angeles 1 mi e Lancaster; Mojave Desert Comment
  UC965499  Poa secunda subsp. secunda Herbert L. Mason 1952-7-19 14435 Nevada meadow opposite University of CA Trout Laboratory (Sage Hen Creek); Sierra Nevada 1981 Comment
  CAS-BOT-BC244250  Poa unilateralis H. L. Mason 1921-5-28 s.n. San Mateo Pebble Peach, near Pescadero Comment
  UC570736  Pogogyne douglasii H. L. Mason Jun 1930 5683 Lake four miles east of Middletown 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
  UC1988932  Pogogyne serpylloides Herbert L. Mason 1926-4-10 2803 Alameda Arroyo Mocho, 6 miles of Livermore Comment
  UC1988945  Pogogyne zizyphoroides H. L. Mason 1928-5-3 4476 Amador Hills near Carbondale Comment
  UC714181  Polemonium eximium Herbert L. Mason 1936-7-23 11294 Tuolumne alpine slopes Mount Conness; Sierra Nevada, alpine slopes Mount Conness 3505 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
  UC635628  Polygala californica H. L. Mason 1934-4-28 8087 Sonoma Jensen's Ranch Comment
  GH347765  Polygala cornuta H. L. Mason 1926-5-29 3288 Unknown Donner Pass Road near Alta Comment
  CAS-BOT-BC167814  Polygala cornuta var. cornuta H. L. Mason 1926-5-29 3288 Nevada Donner Pass Road near Alta Comment
  CAS-BOT-BC167835  Polygala cornuta var. fishiae H. L. Mason 1923-6-20 524 Ventura Camp Comfort, San Antonio Canyon, Ojai Comment
  UC1060642  Polygonum Herbert L. Mason 1955-8-14 14655 Modoc n of Rim Rock Valley Reservoir (Frift Fence Reservoir); Frift Fence Reservoir Comment
  UC1101135  Polygonum amphibium var. stipulaceum Herbert L. Mason 1948-7-18 13613 Siskiyou Grass Lake Comment
  UC1101137  Polygonum amphibium var. stipulaceum Herbert L. Mason 1946-7-27 12950 Lake 2-3 mi n Lakeport; Clear Lake Comment
  UC1195913  Polygonum amphibium var. stipulaceum Herbert L. Mason 1958-8-9 14866 Tuolumne w Hetch-Hetchy Dam (meadow at lake); Sierra Nevada, Yosemite National Park, Swamp Lake 1584 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
  UC1177520  Polygonum bistortoides Herbert L. Mason, B. Fuller and H. Whisler 1958-6-29 3 Nevada 1 mi w University of California Trout Laboratory (peat meadow back of stream, 12 mi n of Truckee); Sierra Nevada, Sage Hen Creek 1981 Comment
  SEINET11938910  Polygonum douglasii H. L. Mason 1936-1 11509 Mariposa Yosemite National Park, Peregoy Meadow, Glacier Point road 2256 Comment
  UCD100248  Polygonum douglasii Herbert L. Mason 1948-7-17 13598 Siskiyou Eastern Grass Lake. Comment
  UC1056966  Polygonum douglasii subsp. douglasii Herbert L. Mason 1936-7-27 11391 Tuolumne w Tioga Pass; Sierra Nevada, Yosemite National Park, Gaylor Lakes 3200 Comment
  UC1093950  Polygonum douglasii subsp. douglasii Herbert L. Mason 1938-7-11 11935 Tuolumne Miguel Meadow Sierra Nevada, Yosemite National Park (margin of lake at gravel pit, w of Hetch Hetchy) 1584 Comment
  UC1179023  Polygonum douglasii subsp. spergulariiforme Herbert L. Mason 1936-9-20 11539 Lake St. Helena Creek Snow Mountain Comment
  UC971923  Polygonum douglasii subsp. spergulariiforme Herbert L. Mason 1950-7-15 14044 Siskiyou Scott Creek Scott Valley Comment
  UC1101166  Polygonum hydropiperoides Herbert L. Mason and S. Galen Smith 1948-8-9 8302 Merced 1 mi w Los Banos Comment
  SEINET11939041  Polygonum kelloggii H. L. Mason 1957-1 14706 Modoc W side of Said Valley 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
  UC1101142  Polygonum lapathifolium Herbert L. Mason 1947-8-8 13466 Modoc nw Alturas (sw margin of reservoir); Big Sage Reservoir Comment
  UC1101145  Polygonum lapathifolium Herbert L. Mason August 1930 5718 Lake Clear Lake; along shores Comment
  UC1093951  Polygonum minimum Herbert L. Mason 1938-7-22 11966 Tuolumne Vernon Lake trail n Hetch Hetchy; Yosemite National Park 2072 Comment
  SEINET3399391 Image available Polygonum paronychia Herbert L. Mason 1926-4-18 2872 San Francisco Dunes, San Francisco Comment
  JEPS22874  Polygonum polygaloides subsp. confertiflorum Herbert L. Mason Jul 29 1955-Jul 31 1955 14639 Lassen Pine Creek Flat Comment
  UC965537  Polygonum polygaloides subsp. confertiflorum Herbert L. Mason 1952-7-17 14389 Plumas Beckwourth Sierra Valley Comment
  UC1093678  Polygonum polygaloides subsp. confertiflorum H. L. Mason 1955-8-14 14657 Modoc n Everly Reservoir Comment
  UC1111532  Polygonum polygaloides subsp. confertiflorum Herbert L. Mason 1957-6-21 14700 Plumas vernal pool e Beckwourth Butte; Sierra Valley Comment
  UC1111535  Polygonum polygaloides subsp. confertiflorum H. L. Mason 1957-6-21 14706 Modoc Said Valley; w side Comment
  CAS-BOT-BC419906  Polygonum polygaloides subsp. kelloggii Herbert L. Mason 1936-8-6 11516 Mariposa Sierra Nevada, Yosemite National Park. Peregoy Meadow, Glacier Point road 2255 Comment
  CAS-BOT-BC420065  Polygonum polygaloides subsp. kelloggii Herbert L. Mason 1948-7-17 13599 Siskiyou Eastern Grass Lake Comment
  UC1060645  Polygonum polygaloides subsp. kelloggii Herbert L. Mason 1957-7-7 14729 Nevada sw Hobart Mills; Prosser Meadow Comment
  CAS-BOT-BC420064  Polygonum polygaloides subsp. kelloggii Herbert L. Mason 1948-7-18 13621 Siskiyou Grass Lake Comment
  RSA312538  Polygonum punctatum H. L. Mason 1928-9-30 4969 San Joaquin San Joaquin Delta near Holt. Comment
  UC1083118  Polygonum shastense Herbert L. Mason 1936-7-29 11438 Mono cirque below Conness Glacier (w of Saddlebag Lake) 3200 Comment
  UC912478  Polygonum shastense Herbert L. Mason 1933-9-2 7259 Amador Silver Lake Sierra Nevada Comment
  CAS-BOT-BC76945  Polypodium californicum H. L. Mason 1921-6-1 s.n. San Mateo Pebble Beach near Pescadero Comment
  SACT002059  Polypogon monspeliensis Herbert Mason, Verne Grant 1946-8-28 Unknown Pond on Highway 5 about 3 miles south of Daly City Road. Comment
  UC672630  Polystichum dudleyi Herbert L. Mason 1927-7-31 4004 Santa Cruz Bean Creek Mt. Herman; Santa Cruz Mts. Comment
  JEPS60084  Polystichum imbricans subsp. imbricans H. L. Mason 1923-7-21 629 Tuolumne tracks near summit of grade Hetch Hetchy R.R.; Sierra Nevada Mts., Yosemite Nat'l Park Comment
  SEINET10460780  Porterella carnosula Mason 1952-7-19 Mason 14439 Sierra Margins of marshy pond 1.5 miles east of Calpine near junction of Sierraville-Beckwith road and Calpine road, Sierra Valley 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-BC452153  Potamogeton diversifolius Herbert L. Mason 1948-6-10 13591 Merced Delta road, 3 miles east of Los Banos [Banos] Comment
  UC1099882  Potamogeton epihydrus subsp. nuttallii Herbert L. Mason, Verne Grant 1947-6-12 13397 Modoc several mi s of Alturas (by Jones' Lane, off Hwy 395) Comment
  UC1099862  Potamogeton foliosus Herbert L. Mason, S. Galen Smith 1948-8-9 8287 Merced about 10 mi w of summit of Pacheco Pass; Pacheco Creek Comment
  UC1100038  Potamogeton foliosus Herbert L. Mason 1946-6-28 12878 Alameda San Leandro Creek 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
  POM312989  Potamogeton natans H. L. Mason 1946-5-18 12770 Mendocino Sand dune, six miles north of Fort Bragg. Comment
  UC1100070  Potamogeton nodosus Herbert L. Mason, Verne Grant 1946-7-5 12907 Solano just n of Vallejo (in Lake Chabot water reservoir); Lake Chabot Comment
  CAS-BOT-BC453812  Potamogeton nodosus Herbert L. Mason 1945-7-10 12640 Butte Sanford slough, Butte Sink, southwest corner of Butte County. Comment
  UC1100071  Potamogeton nodosus Herbert L. Mason 1947-7-10 12640 Butte Sanford Slough, sw corner of Butte County Sanford Slough; , Butte Sink Comment
  UC1099815  Potamogeton pectinatus Herbert L. Mason, S. Galen Smith 1948-7-27 8220 Merced 1/4 mi s of Ingomar Comment
  UCD138286  Potamogeton pusillus Herbert L. Mason 1948-6-29 13581 Merced 5 miles north of Volta. Comment
  UC1099896  Potamogeton pusillus var. pusillus Herbert L. Mason, S. Galen Smith 1948-8-10 8309 Merced just w of South Dos Palos Comment
  UC1100039  Potamogeton pusillus var. pusillus Herbert L. Mason, S. Galen Smith 1948-8-19 8363 Merced about 2 mi ne of Merced (on Snelling highway) Comment
  CAS-BOT-BC242275  Potamogeton richardsonii Herbert Louis Mason; Verne Grant 1947-7-11 13380 Modoc Road from Likely to Jess Valley, ca. 1 mi. E of Likely. Comment
  POM313013  Potamogeton richardsonii H. L. Mason, Verne Grant 1947-7-11 13380 Modoc Irrigation ditch on road from Likely to Jess Valley, ca. 1 mile east of Likely. Comment
  UC1056964  Potamogeton robbinsii Herbert L. Mason 1938-7-6 11857 Tuolumne Swamp Lake w of Hetch Hetchy; Sierra Nevada, Yosemite National Park 1584 Comment
  UC1099850  Potamogeton striatus Herbert L. Mason 1947-8-15 13540 Modoc e. side Goose Lake (mouth of Crane Creek on Willow Ranch) 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
  UC642630  Potentilla amicarum H. L. Mason 1936-7-23 11302 Tuolumne Mount Conness Sierra Nevada, Mount Conness 3505 Comment
  CAS-BOT-BC143210  Potentilla breweri Herbert L. Mason 1923-8-7 723 Tuolumne Dana Fork of the Tuolumne River, Yosemite National Park, Sierra Nevada Comment
  UC673324  Potentilla breweri Herbert L. Mason 1923-8-7 723 Tuolumne 0.5 mi from mouth, Dana Fork Tuolumne River Moraine Creek; Sierra Nevada, Yosemite Natl Park, Dana Fork Tuolumne R Comment
  UC673310  Potentilla drummondii Herbert L. Mason 1923-8-6 717 Tuolumne near Lyell Fork Tuolumne River (Yosemite National Park); Sierra Nevada, Yosemite Natl Park, Lyell Fork Tuolumne R Comment
  UC673330  Potentilla drummondii Herbert L. Mason 1923-8-8 732 Tuolumne 0.5 mi from mouth Moraine Creek (Dana Fork Tuolumne River); Sierra Nevada, Yosemite Natl Park, Dana Fork Tuolumne R Comment
  UC673332  Potentilla drummondii Herbert L. Mason 1923-8-8 729 Tuolumne 0.5 mi from mouth Moraine Creek (Dana Fork Tuolumne River); Sierra Nevada, Yosemite National Park, Dana Fork Tuolumne River Comment
  UC673329  Potentilla flabellifolia Herbert L. Mason 1923-8-8 731 Tuolumne 0.5 mi from mouth, Dana Fork Tuolumne River Moraine Creek; Sierra Nevada, Yosemite Natl Park, Dana Fork Tuolumne R Comment
  UC1083119  Potentilla fruticosa Herbert L. Mason 1936-7-25 11375 Tuolumne w of Tioga Pass; Sierra Nevada, Yosemite National Park, Gaylor Lakes 3200 Comment
  UC1039605  Potentilla palustris Herbert L. Mason 1940-7-25 12331 El Dorado Luther Pass Grass Lake (Grass Lake, eastern El Dorado County); , Luther Pass 2377 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
  UC1083120  Prunus andersonii Herbert L. Mason 1936-8-1 11501 Mono 3 mi. n. Mono Lake; Sierra Nevada, Yosemite Nat'l Park Comment
  A346446  Prunus emarginata H. L. Mason 1933-9-2 7263 Unknown Silver Lake, Sierra Nevada Mountains Comment
  SBBG28167  Prunus fasciculata var. fasciculata H. L. Mason 1935-5-1 Kern ridge S of Isabella Comment
  CAS-BOT-BC163000  Prunus fasciculata var. fasciculata Herbert L. Mason 1941-3-28 12403 San Luis Obispo North end of Nipomo Mesa 76 Comment
  GH346503  Prunus fasciculata var. punctata H. L. Mason 1941-5-28 12403 Unknown north end of Nipomo mesa 76 Comment
  UC555691  Prunus ilicifolia Herbert L. Mason 1927-6-14 3758 Los Angeles San Antonio Canyon, San Gabriel Mountians San Antonio Canyon; San Gabriel Mountians, San Antonio Canyon 914 Comment
  UC632864  Pseudobahia heermannii H. L. Mason 1936-3-20 11002 Tuolumne 3 mi above Tuolumne Comment
  CAS-BOT-BC356425  Pseudognaphalium beneolens H. L. Mason 1934-9-9 8151 Monterey Santa Lucia Mountains, near the Indians Comment
  UC632842  Pseudognaphalium biolettii H. L. Mason 1936-3-6 10989 San Luis Obispo 11 mi w San Luis Obispo; Pecho Hills Comment
  UC632820  Pseudognaphalium luteoalbum H. L. Mason 1936-4-12 11072 Amador near Lancha Plana; Mokelumne River Comment
  UC672217  Pseudognaphalium stramineum H. L. Mason 1932-5-4 7057 Alameda Laundry Farm Oakland Hills (Oakland Hills) Comment
  UC1076354  Pseudotsuga macrocarpa H. L. Mason 1927-6-15 3763 San Bernardino slopes of Mt. Baldy; San Gabriel Mts., Mt. Baldy 1889 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
  UC1099790  Psilocarphus brevissimus var. brevissimus Herbert L. Mason 1947-3-30 13162 Sutter 1 mi n West Butte Comment
  UC694158  Psilocarphus brevissimus var. brevissimus H. L. Mason 1932-4-24 6967 San Joaquin 11 mi s Clements Comment
  UC581170  Psilocarphus chilensis H. L. Mason 1935-3-30 8329 Kern plains w Bakersfield Comment
  UC1178978  Psilocarphus oregonus Herbert L. Mason 1946-5-31 12801 Lake 1.5 mi w Lower Lake Comment
  UC552339  Psilocarphus oregonus Lucile R. Mason 1935-4-9 Contra Costa Marsh Creek Comment
  UC694156  Psilocarphus tenellus H. L. Mason 1932-4-25 6990 Amador hill above Ione Comment
  UC694155  Psilocarphus tenellus Lucile Mason 1934-4-1 Monterey Lucia Comment
  UC558488  Psilotum nudum Herbert L. Mason 1936-11-16 San Francisco In pot with cycad, Conservatory, Golden Gate Park, San Francisco Comment
  GH347958  Ptelea crenulata H. L. Mason 1928-4-1 4270 Unknown Canyon back of Antioch hills north of Mount Diablo Comment
  JEPS40168  Ptelea crenulata H. L. Mason 1928-3-31 Contra Costa Mt. Diablo Comment
  SEINET951713  Pteridaceae Charles T. Mason Jr. 1948-1 1111 Santa Clara 0.5 miles west of 'Buckeye Ranch,' along Quimby road to Mount Hamilton 518 Comment
  CAS-BOT-BC421182  Pterostegia drymarioides H. L. Mason; H. A. Borthwick 1921-3-20 s.n. Santa Clara Guadalupe Canon [Canyon] Comment
  UC555698  Purshia tridentata var. glandulosa H. L. Mason 1926-4-27 3024 Los Angeles Rock Creek Comment
  JEPS58854  Pyrola asarifolia H. L. Mason 1924-6-26 Plumas Blairsden Comment
  UC1076079  Quercus X macdonaldii Herbert L. Mason 1927-9-24 4091 Santa Barbara near West Ranch; Santa Cruz Island Comment
  UCD45068  Quercus agrifolia Herbert L. Mason 1946-6-8 12843 Santa Barbara Bluff Camp, south side of Big Pine Mountain, altitude 4500 feeet, Santa Barbara County. 1371 Comment
  UCD45205  Quercus berberidifolia H. L. Mason 1926-1-1 2597 Lake Blue Lakes. Comment
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Jun 2 2008
  UC1083188  Quercus chrysolepis H. L. Mason 1930-10-25 5750 Monterey Headwaters of the Arroyo Seco Santa Lucia Mts. Comment
  UC1076207  Quercus douglasii Herbert L. Mason 1929-6-2 5350 Kern 30 mi from Bakersfield; Tehachapi Mountains, Tejon Pass Comment
  UCD45925  Quercus durata var. durata H. L. Mason 1925-12-30 2557 Mendocino Hopland-Cloverdale Grade, Mendocino Co. Comment
  UC1076205  Quercus garryana H. L. Mason 1925-10-4 2237 Marin near Phoenix Lake (n side of Mt. Tamalpais); Mt. Tamalpais Comment
  UCD45307  Quercus pacifica Herbert L. Mason 1927-9-24 4091 Santa Barbara Santa Cruz Island, Santa Barbara Co. Comment
  UCD47141  Quercus parvula var. shrevei Herbert L. Mason 1929-12-1 5513 Santa Cruz Swanton, Santa Cruz County. 304 Comment
  UCD47349  Quercus tomentella Herbert L. Mason 1927-9-25 4102 Santa Barbara Occasional in forests and canyons. Pass from West Ranch to Prisoner's harbor, Santa Cruz Island, Santa Barbara Co. Comment
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Apr 29 2014
  UC1199514  Quercus vacciniifolia Herbert L. Mason 1929-10-4 6573 El Dorado hills above Glen Alpine; Fallen Leaf Lake Comment
  UCD47406  Quercus vacciniifolia H. L. Mason 1932-7-21 7018 Humboldt East slope of Southfork Mts. On road Arcata to Weaverville, Humboldt County. Comment
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Oct 6 2006
  UC565542  Rafinesquia californica Herbert L. Mason 1926-5-26 3253 Alameda Sunol Niles Canyon Comment
  UC635421  Ranunculus aquatilis var. hispidulus H. L. Mason 1925-6-27 2120 Tuolumne Hog Ranch Mather Comment
  UC635097  Ranunculus canus var. canus H. L. Mason 1929-3-15 5055 Contra Costa on summit of hill east of Nortonville 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
  UC642908  Ranunculus eschscholtzii var. oxynotus H. L. Mason 1936-7-31 11473 Mono e Saddlebag Lake; Sierra Nevada, Tioga Crest 3474 Comment
  UC634972  Ranunculus hebecarpus H. L. Mason 1929-3-29 5126 Contra Costa two mi above Clayton (Marsh Creek Road) Comment
  SEINET5338819  Ranunculus occidentalis E. W. Mason 1976-3-13 s.n. Placer North Fork American River, about 2 miles south of Auburn. 274 Comment
  UC1195912  Ranunculus orthorhynchus var. orthorhynchus Herbert L. Mason 1958-8-9 14885 Tuolumne Swamp Lake Sierra Nevada, Yosemite National Park, Hetch Hetchy Dam (w side of dam) 1584 Comment
  UC634929  Ranunculus orthorhynchus var. orthorhynchus H. L. Mason 1923-7-13 588 Tuolumne Hog Ranch Mather Comment
  UCD97100  Ranunculus sceleratus H. L. Mason 1937-6-12 11547 Contra Costa 0.5 mile from the south end of Borden Highway and about 1.5 miles west of Byron. Comment
  UC1178884  Reseda luteola Herbert L. Mason 1942-9-29 12558 Napa 2 mi n of Calistoga (Napa River); Napa River Comment
  UC629707  Rhamnus alnifolia H. L. Mason 1939-8-3 12200 Placer 7 mi nw Tahoe City; Squaw Valley 1889 Comment
  UC570985  Rhamnus californica subsp. californica Herbert L. Mason 1927-7-30 3988 Monterey Cypress Point Comment
  UC570986  Rhamnus californica subsp. californica Herbert L. Mason 1928-4-8 4293 Sonoma 2 mi n Fort Ross Comment
  CAS-BOT-BC59912  Rhamnus crocea H. L. Mason 1921-5-7 s.n. Monterey Rancho del Monte, Carmel River. Comment
  UC570995  Rhamnus crocea Herbert L. Mason 1934-6-23 539 Monterey Carmel River Comment
  UC570991  Rhamnus ilicifolia H. L. Mason 1928-5-3 4465 Amador 1 mi s Ione Comment
  UC570996  Rhamnus purshiana Herbert L. Mason 1924-6-19 1071 Plumas along stream running n into Bear Lake Bear Lake Comment
  UC570981  Rhamnus tomentella subsp. tomentella Herbert L. Mason 1923-6-16 439 Santa Barbara La Cumbre Peak Comment
  UC571037  Rhododendron macrophyllum H. L. Mason 1932-8-26 7157 Mendocino Mendocino City, [Pine Barrens] Mendocino City Comment
  UC634737  Rhododendron macrophyllum H. L. Mason 1928-8-25 4922 Mendocino 1 mi from Noyo River (near Noyo) Comment
  GH363055  Rhododendron macrophyllum H. L. Mason 1928-7-11 4896 Unknown Fort Ross to Willits Comment
  UC634741  Rhododendron occidentale H. L. Mason 1923-7-20 625 Tuolumne Hog Ranch, Middle Fork Hog Ranch; , Middle Fork Comment
  CAS-BOT-BC170443  Rhus integrifolia H. L. Mason 1926-4-26 2943 Los Angeles Pacoima Wash, foothills of San Gabriel Mountains Comment
  UC635200  Rhus integrifolia H. L. Mason 1925-4-18 1499 San Diego Hills back of Navy Fuel Dock Comment
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Feb 27 2017
  RSA650223  Rhus ovata G. W. Mason 1949-1-23 s.n. Riverside Found in Batista Canyon 7-10 miles east of Hemet 518 Comment
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Apr 29 2011
  UC635189  Rhus trilobata H. L. Mason 1926-3-21 2763 Lake Toll House Canyon between Middletown and Mount St. Helena; Toll House Canyon Comment
  CAS-BOT-BC111865  Rhynchospora alba Herbert L. Mason 1946-7-4 12880 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
  UC570848  Ribes amarum Herbert L. Mason 1923-6-16 457 Santa Barbara vicinity Santa Barbara (La Combre Peak by way of La Combre Trail and Rattlesnake Canyon); La Combre Peak Comment
  UC570841  Ribes aureum var. gracillimum H. L. Mason 1932-4-3 6924 San Benito nw Priest Valley (near summit of grade); Lewis Creek Grade 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
  UC1081574  Ribes lasianthum Herbert L. Mason 1936-7-10 11186 Tuolumne se White Wolf (Lukens Lake); Sierra Nevada, Yosemite National Park 2560 Comment
  UC570817  Ribes malvaceum H. L. Mason 1931-3-22 5796 Lake Mount Konocti Comment
  UC1191513  Ribes menziesii Herbert L. Mason 1946-7-24 12924 Marin second lake s Bear Valley (on road to Lake Ranch) Comment
  UC570979  Ribes montigenum H. L. Mason 1922-7-26 333 Tuolumne Porcupine Flat Sierra Nevada Mountains, Yosemite National Park 2133 Comment
  UC570974  Ribes quercetorum Herbert L. Mason 1926-4-10 2821 Alameda Arroyo Mocho Canyon Comment
  UC570963  Ribes sanguineum var. glutinosum Herbert L. Mason 1926-2-21 2645 Marin Inverness 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
  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
  UC555673  Rosa californica H. L. Mason 1930-10-25 5774 Monterey banks of river between Jolon and Santa Lucia Ranger Station (in foothills); San Antonio River Comment
  UC555674  Rosa californica H. L. Mason 1929-10-12 5498 San Luis Obispo 10 mi w Atascadero Comment
  UC555639  Rosa pinetorum H. L. Mason 1932-7-31 7133 Santa Cruz near mouth of Waddell Creek Comment
  UC1191581  Rotala ramosior Herbert L. Mason, Verne Grant 1946-9-27 13134 Butte 3 mi w of Biggs Comment
  UC1039998  Rubus parviflorus Herbert L. Mason 1936-7-9 11178 Mariposa s White Wolf (hill forming boundary between Tuolumne and Mariposa Counties); Sierra Nevada, Yosemite National Park, s of White Wolf 2590 Comment
  CAS-BOT-BC158701  Rubus spectabilis H. L. Mason 1922-3-29 s.n. Santa Cruz Liddell Creek near mouth of canyon. Comment
  UC555294  Rubus spectabilis H. L. Mason 1926-2-21 2644 Marin Inverness Comment
  UC1101201  Rumex conglomeratus Herbert L. Mason and Verne Grant 1946-7-5 12912 Solano just n Vallejo (in Lake Chabot water reservoir); Lake Chabot Comment
  UC1101190  Rumex crispus Herbert L. Mason and Verne Grant 1947-6-26 13240 Solano Cordelia Slough Suisun Marsh Comment
  UC1101191  Rumex crispus Herbert L. Mason 1927-10-4 4136 Santa Cruz Ano Nuevo Point Mouth of Waddell Creek Comment
  CAS-BOT-BC211349  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
  CAS-BOT-BC433866  Rumex salicifolius Herbert L. Mason 1945-8-16 12652 Solano Grizzly Island, near Suisun Bay Comment
  UC1101193  Rumex salicifolius var. crassus Herbert L. Mason 1927-10-4 4131 Santa Cruz Mouth of Waddell Creek Ano Nuevo Point 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
  UC965636  Rumex salicifolius var. salicifolius Herbert L. Mason 1952-7-18 14395 Nevada upstream Univ. of Calif Trout Laboratory; Sierra Nevada, Sage Hen Creek 1981 Comment
  UC555350  Rupertia physodes H. L. Mason 1926-5-26 3241 Alameda Niles Canyon Comment
  CAS-BOT-BC454144  Ruppia maritima Herbert L. Mason 1945-7-20 s.n. Monterey Elkhorn Slough Comment
  CAS-BOT-BC454176  Ruppia maritima H. L. Mason 1921-6-2 s.n. San Mateo Pebble Beach near Pescadero Comment
  UC935723  Sagittaria cuneata Herbert L. Mason and Verne Grant 1947-7-11 13381 Modoc irrigation ditch on road from Likely to Jess Valley ca 1 mi e Likely; Irrigation ditch on road from Likely to Jess Valley Comment
  UC935797  Sagittaria cuneata Herbert L. Mason 1948-7-18 13607 Siskiyou Grass Lake Comment
  UC1178890  Sagittaria latifolia Herbert L. Mason 1945-9-19 12713 Colusa 1 mi n Colusa (on e side, Marshy bank of the Sacramento River); bank of the Sacramento River Comment
  UC935757  Sagittaria latifolia Herbert L. Mason and Verne Grant 1946-8-14 13030 Butte Butte Sink; near big pond on Sacramento Outing Club Comment
  CAS-BOT-BC445794  Sagittaria montevidensis Herbert L. Mason; Verne Grant 1946-8-7 12981 Colusa Eight miles north of Colusa 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
  UC935749  Sagittaria montevidensis subsp. calycina Herbert L. Mason and Verne Grant 1946-8-7 12981 Colusa Butte Sink; eight mi n of Colusa Comment
  UC935724  Sagittaria sanfordii Herbert L. Mason and S. Galen Smith 1948-8-11 8320 Merced s of junction of Merced and San Joaquin Rivers (Crane Ranch); San Joaquin Valley, jct of Merced and San Joaquin Rivers Comment
  UC935743  Sagittaria sanfordii Herbert L. Mason and S. Galen Smith 1948-8-19 8366 Merced on Snelling Highway about 2 mi ne Merced Comment
  UCD138069  Sagittaria sanfordii Herbert L. Mason; S. Galen Smith 1948-8-11 8320 Merced Crane Ranch, south of junction of Merced and San Joaquin Rivers. Comment
  UC672595  Salazaria mexicana H. L. Mason 1926-4-26 2981 Los Angeles Vincent to Palmdale; Vincent to Palmdale Comment
  UC1076552  Salicornia virginica Herbert L. Mason 1929-10-13 5504 San Luis Obispo 2.5 mi n Cambria 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
  UC1179059  Salix exigua var. hindsiana Herbert L. Mason 1947-3-29 13157 Colusa ca. 3 mi n.e. Colusa (along Butte Creek, Butte Sink) Comment
  UC634548  Salix exigua var. hindsiana H. L. Mason 1926-3-14 2719 Napa along stream in grove Mt. St. Helena Comment
  UC634550  Salix melanopsis H. L. Mason 1923-6-23 552 Monterey Carmel R. Comment
  UC634541  Salix planifolia subsp. planifolia H. L. Mason 1923-7-30 672 Tuolumne Lyell Fork - branch of Tuolumne R. Comment
  UC634910  Salvia carduacea H. L. Mason 1932-4-3 6912 a Kern 5 mi e Lost Hills Comment
  UC634923  Salvia carduacea H. L. Mason 1929-3-31 5146 Contra Costa Briones Valley Comment
  UC634924  Salvia columbariae H. L. Mason 1929-3-29 5121 Contra Costa Mt. Diablo 762 Comment
  UC634912  Salvia dorrii var. pilosa H. L. Mason 1926-4-26 2974 Los Angeles 4 mi s Vincent (Mint Canyon Highway); Soledad Pass Comment
  CAS-BOT-BC221117  Salvia sonomensis H. L. Mason 1928-5-4 4497 El Dorado Dugars, 3 miles north of Latrobe Comment
  GH400938  Salvia sonomensis H. L. Mason 1929-4-29 5252 Unknown between Kelseyville and Lower Lake Comment
  UC635705  Samolus parviflorus H. L. Mason September 1930 5904 Monterey Elkhorn Slough between Watsonville and Castroville; Elkhorn Slough Comment
  UC555549  Sanguisorba annua H. L. Mason 1924-6-16 1042 Plumas near Graeagle (South banks of Feather River); s banks of Feather River Comment
  UC566860  Sanicula arctopoides H. L. Mason 1927-3-11 3653 San Francisco San Francisco, Bernal Heights Bernal Heights; San Francisco, Bernal Heights Comment
  UC1178947  Sanicula tuberosa Herbert L. Mason 1939-7-13 12136 Tuolumne w of Hetch Hetchy Valley (vicinity of Miguel Meadow, Sierra Nevada, Yosemite National Park); Sierra Nevada, Yosemite National Park 1584 Comment
  UC566823  Sanicula tuberosa H. L. Mason 1929-3-15 5049 Contra Costa Nortonville Comment
  UC566791  Sanicula tuberosa Herbert L. Mason 1927-5-11 3727 Butte vicinity of Dobbins 457 Comment
  UC1191401  Sarcobatus vermiculatus Herbert L. Mason 1948-9-5 13676 Mono island in Mono Lake Comment
  UC1039999  Saxifraga aprica H. L. Mason 1936-7-27 11393 Tuolumne Gaylor Lakes w of Tioga Pass; Sierra Nevada, Yosemite National Park, Gaylor Lakes 3200 Comment
  GH381136  Saxifraga californica H. L. Mason 1926-3-7 2702 Unknown Mt. Diablo Comment
  UC1081519  Saxifraga californica Herbert L. Mason 1936-3-14 10969 Calaveras 5 mi s of San Andreas Comment
  JEPS26621  Saxifraga ferruginea Herbert L. Mason Jul 18 1961-Jul 22 1961 15125 Siskiyou 1 mi over ridge and se of Castle Lake (Little Castle Lake); Little Castle Lake 1691 Comment
  UC570933  Saxifraga mertensiana H. L. Mason 1929-5-9 5268 Mendocino 5 mi w of Laytonville Comment
  UC1056438  Saxifraga odontoloma Herbert L. Mason 1937-7-30 Mono above Lake Mary Comment
  UC965550  Saxifraga odontoloma Herbert L. Mason 1952-7-18 14401 Nevada upstream from University of California Trout Laboratory ( Sage Hen Creek); Sierra Nevada, Sage Hen Creek 1981 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
  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
  CAS-BOT-BC111440  Schoenoplectus acutus var. occidentalis Herbert L. Mason 1945-9-18 12700 Sutter Margins of pools on overflow lands of Sutter by-pass near bridge on Yuba City-Knight's Landing Hwy. 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
  UC1100771  Scirpus acutus var. occidentalis Herbert L. Mason, Verne Grant 1947-6-26 13271 Solano Suisun Marsh Cordelia Slough, Suisun Marsh Comment
  UC1100772  Scirpus acutus var. occidentalis Herbert L. Mason, Verne Grant 1947-6-26 13256 Solano Suisun Marsh Cordelia Slough, Suisun Marsh 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
  UC1100874  Scirpus americanus Herbert L. Mason, Verne Grant 1947-7-11 13364 Modoc 5 mi s Alturas (irrigation ditch on Highway 395); s of Alturas Comment
  UC1100798  Scirpus californicus Herbert L. Mason 1946-7-24 12918 Marin 2.8 mi n Lake Ranch (margin of first lake s of Bear Valley); margin of first lake s of Bear Valley Comment
  UC1100799  Scirpus californicus Herbert L. Mason, Verne Grant 1946-7-5 12904 Solano in Lake Chabot water reservoir just n Vallejo; n of Vallejo Comment
  POM313083  Scirpus congdonii H. L. Mason, Lawrence W. Reinecke 1937-7-22 11573 Tuolumne Yosemite Nat l Park: Swamp Lake, just south of Miguel Meadows, just west of Hetch Hetchy Dam 1585 Comment
  UC1100858  Scirpus maritimus Herbert L. Mason 1945-9-18 12711 Sutter Pennington Road between Live Oak and Pennington; between Live Oak and Pennington Comment
  UC1100859  Scirpus maritimus Herbert L. Mason 1945-8-16 12660 a Solano near Suisun Bay; Grizzly Island, near Suisun Bay Comment
  UC1100900  Scirpus maritimus Herbert L. Mason and S. Galen Smith 1948-8-12 8334 Merced about 5 mi e Gustine (San Joaquin Valley); , e of Gustine Comment
  UC1100918  Scirpus maritimus Herbert L. Mason, Verne Grant 1947-5-14 13231 Solano Suisun Marsh Cordelia Creek, Suisun Marsh Comment
  UC1100919  Scirpus maritimus Herbert L. Mason, Verne Grant 1946-8-15 13046 Butte Greylodge Game Refuge near caretaker's house; Butte Sink, Greylodge Game Refuge Comment
  UC1100920  Scirpus maritimus Herbert L. Mason, Verne Grant 1946-8-15 13046 Butte Greylodge Game Refuge near caretaker's house (Butte Sink); , Greylodge Game Refuge Comment
  UC1100923  Scirpus maritimus Herbert L. Mason, Verne Grant 1946-8-6 12965 -A 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
  UC1100803  Scirpus pungens Herbert L. Mason 1948-9-4 13668 Mono Rush Creek , Rush Creek (Mono Lake) Comment
  UC1100807  Scirpus pungens Herbert L. Mason 1948-9-2 13630 Kern Walker Pass Comment
  CAS-BOT-BC519009  Scoliopus bigelovii W. E. Mason 1917-4-1 s. n. San Mateo La Honda Grade Comment
  UC673545  Scrophularia californica H. L. Mason 1923-8-6 710 Tuolumne s side of dome on <gore> between Lyell and Dana forks of Tuolumne River; Sierra Nevada Mts Comment
  UC673546  Scrophularia californica subsp. floribunda H. L. Mason 1929-6-2 5352 Kern 30 mi from Bakersfield (Tejon Pass); Tehachapi Mts Comment
  UC565457  Scutellaria californica Herbert L. Mason 1929-10-4 5458 Placer 1 mi above Cisco Comment
  UC1713664  Scutellaria tuberosa Herbert L. Mason 1925-2-16 1251 Alameda ridge n of Mills College Comment
  UC565460  Scutellaria tuberosa Herbert L. Mason 1928-4-15 4342 Contra Costa top of Moraga Ridge Comment
  RSA114112  Sedella pentandra H. L. Mason 1953-5-4 s.n. Colusa Little Stony Creek Road 0.25 miles above junction of Little Stony Creek and Trout Creek, Inner North Coast Ranges. 610 Comment
  CAS-BOT-BC417037  Sedella pumila H. L. Mason 1938-4-14 11703 Tulare Rocky Hill, east of Exeter. 304 Comment
  CAS-BOT-BC417033  Sedella pumila H. L. Mason 1938-5-10 11820 Tulare Near Auckland Ranch on General Grant National Park road southwest of Badger. 457 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
  UC1178841  Sedum radiatum Herbert L. Mason 1938-7-21 11880 Tuolumne just n Hetch Hetchy Valley (at junction of Frog Creek and Vernon Lake trail); Sierra Nevada, n of Hetch Hetchy Valley 1798 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
  UC1093641  Sedum stenopetalum Herbert L. Mason 1957-7-6 14719 a Modoc Mill Creek , Mill Creek (Warner Mountains) Comment
  UC1191515  Sedum stenopetalum Herbert L. Mason 1948-7-18 13627 Siskiyou Grass Lake Comment
  UC1076341  Selaginella wallacei Herbert L. Mason 1925-2-1 1224 Marin Mt. Tamalpais Comment
  UC566657  Senecio aronicoides Herbert L. Mason 1932-4-25 7013 El Dorado Pilot Hill Comment
  UC566660  Senecio flaccidus var. douglasii H. L. Mason 1930-10-25 5765 Monterey San Antonio River , San Antonio River (Santa Lucia Mountains) Comment
  GH427714  Senecio flaccidus var. monoensis H. L. Mason 1925-4-25 3088 Unknown Box S. Springs Comment
  POM264329  Senecio fremontii H. L. Mason 1940-7-30 12352 Alpine Hills north of Carson Pass; Sierra Nevada. 2683 Comment
  UC566632  Senecio minimus H. L. Mason 1928-10-21 5002 Mendocino Pudding Creek Fort Bragg, Pudding Creek Comment
  UC1178986  Sericocarpus oregonensis subsp. californicus Herbert L. Mason 1945-9-9 12694 Sierra s of Downieville; Yuba River Canyon Comment
  UC1100460  Setaria pumila Herbert L. Mason 1946-9-12 13127 San Joaquin slough s. of main ditch, Borden Hwy., near Dagget Rd., Roberts Isl. Roberts Isl. Comment
  UC1100461  Setaria pumila Herbert L. Mason 1945-9-18 12712 Sutter Pennington Rd. between Live Oak and Pennington Comment
  UC1100451  Setaria viridis Herbert L. Mason and Malcolm A. Nobs 1948-9-3 491 Riverside 2 mi. n. Indio Comment
  UCD92862  Setaria viridis Herbert L. Mason; Malcolm A. Nobs 1948-9-3 491 Riverside 2 miles north of Indio. Comment
  GH420707  Sidalcea hartwegii H. L. Mason 1932-4-24 Unknown Near base of Pilot Hill about 11 mi. E. of Folsom Comment
  UC1191166  Sidalcea hartwegii Herbert L. Mason 1932-4-25 El Dorado w Pilot Hill; w of Pilot Hill Comment
  UC965541  Sidalcea oregana subsp. spicata Herbert L. Mason 1952-7-11 14336 Nevada in meadow one mi w University of California Trout Laboratory (Sage Hen Creek); Sierra Nevada, w of University of California Trout Laborator 1981 Comment
  UC604423  Silene californica H. L. Mason 1938-5-10 11816 Tulare on General Grant National Park sw Badger (near Auckland Ranch); General Grant National Park sw of Badger 457 Comment
  UC640584  Silene douglasii H. L. Mason 1924-6-20 1088 Plumas above Graeagle Lodge; above Graeagle Lodge Comment
  UC640583  Silene laciniata subsp. major H. L. Mason 1923-6-15 414 Santa Barbara La Purisima Ridge La Purisima Ridge (Harris Grade) 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
  UCD115502  Sisymbrium altissimum Herbert L. Mason 1947-7-10 13346 Modoc Dorris Reservoir, 2 miles east of Alturas. Comment
  UC672082  Smilacina stellata Herbert L. Mason 1926-5-30 3308 a El Dorado hill slope back of Emerald Bay (above falls); Lake Tahoe Comment
  UC570680  Solanum douglasii Herbert L. Mason 1923-6-19 520 Ventura near Ojai Comment
  UC1191778  Solanum triflorum Herbert L. Mason, Verne Grant 1947-7-10 13341 Modoc 2 mi e of Alturas (Dorris Reservoir); Dorris Reservoir Comment
  GH244848  Solanum umbelliferum H. L. Mason 1940-5-5 12276 Unknown North slope of Twin Peaks, North Fork of Los Banos Creek, Inner South Coast Ranges Comment
  UC570682  Solanum umbelliferum Herbert L. Mason 1923-6-18 500 Ventura Topa Topa Mountain, Timber Canyon Timber Canyon; Topa Topa Mountain, Timber Canyon Comment
  UC570690  Solanum umbelliferum Herbert L. Mason 1926-5-28 3269 Placer 5 mi above Auburn Comment
  GH244920  Solanum umbelliferum H. L. Mason 1928-5-3 4485 Unknown South bank of Cosumnes River opposite Clark Creek Comment
  UC1093953  Solanum umbelliferum Herbert L. Mason 1936-3-6 10986 San Luis Obispo 11 mi w of San Luis Obispo (Pecho Hills); Pecho Hills Comment
  UC570692  Solanum umbelliferum Herbert L. Mason 1924-6-19 1066 Plumas slide just west of Gold Lake Comment
  UC672221  Solidago elongata H. L. Mason 1924-10-19 1124 San Francisco Merced Lake , Merced Lake (San Francisco) Comment
  UC1192251  Solidago spectabilis Herbert L. Mason 1947-8-11 13497 Modoc On Highway 81, west margin of Lower Lake, near boundary, between Lassen and Modoc counties. Comment
  UC672191  Solidago velutina subsp. californica H. L. Mason 1925-7-31 2201 Tuolumne Mather , Mather (Sierra Nevada Mountains) Comment
  UC635706  Soliva sessilis H. L. Mason 1928-4-13 4315 Marin hills n San Rafael Comment
  CAS-BOT-BC235306  Sorghum halepense Herbert L. Mason 1945-9-19 12723 Colusa Below causway over Butte Sink spillway, east bank of Sacramento River, 1 mile north of Colusa Comment
  UC1099812  Sparganium angustifolium Herbert L. Mason 1922-8-19 359 Tuolumne Dog Lake; Yosemite National Park, Tuolumne Meadows 2743 Comment
  UC1099793  Sparganium erectum subsp. stoloniferum Herbert L. Mason 1946-6-9 12876 San Luis Obispo between Oceano and mouth of Santa Maria River (Dune Lakes); Dune Lakes Comment
  POM312969  Sparganium erectum subsp. stoloniferum H. L. Mason 1946-7-24 12925 Marin Second lake south of Bear Valley on road to Lake Ranch. Comment
  SEINET3825672  Sparganium eurycarpum Herbert L. Mason, Verne Grant 1946-8-14 13016 Butte Canal near big pond on Sacramento Outing Club Butte Sink Comment
  JEPS19916  Sparganium natans Herbert L. Mason 1957-7-16 14799 El Dorado just n Luther Pass (on Highway 89); Grass Lake 2346 Comment
  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
  SD49861  Sphaeralcea ambigua var. ambigua Herbert L. Mason 1952-4-9 14230 San Bernardino 10 miles south of Needles. Comment
  UC1093908  Spiranthes stellata Herbert L. Mason 1938-7-7 11877 Tuolumne w Hetch Hetchy; Sierra Nevada, Yosemite National Park, Swamp Lake 1584 Comment
  CAS-BOT-BC534890  Spirodela polyrhiza Herbert L. Mason 1953-7-8 14561 Plumas Four miles northwest of Loyalton Comment
  CAS-BOT-BC534892  Spirodela polyrhiza Herbert L. Mason 1953-7-8 14561 Plumas Four miles northwest of Loyalton Comment
  UC635178  Stachys ajugoides var. rigida H. L. Mason 1925-7-16 2168 Tuolumne near Mather (Hog Ranch) Comment
  UC1191910  Stachys albens Herbert L. Mason, Verne Grant 1947-6-26 13266 Solano Cordelia Slough Suisan Marsh Comment
  UCLA71460  Stachys albens H. L. Mason 1925-7-16 2169 Tuolumne near Mather (Hog Ranch) Comment
  UC936170  Stellaria calycantha Herbert L. Mason 1936-7-28 11419 Mono Mount Dana Plateau Comment
  UC1076562  Stellaria obtusa Herbert L. Mason 1938-7-22 11960 Tuolumne n of Hetch Hetchy (Beehive); Sierra Nevada, Yosemite National Park, Beehive 1996 Comment
  SEINET4152199  Stenophyllus capillaris H. L. Mason 1938-7-13 11946 Mariposa Base of El Capitan, Yosemite Valley 1227 Comment
  YM-YOSE65592  Stenophyllus capillaris H. L. Mason 1938-7-6 11858 Tuolumne BETWEEN SWAMP LAKE AND MIGUEL MEADOWS 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
  UC1178914  Streptanthus barbiger Herbert L. Mason 1946-7-4 12896 Sonoma ridge 2 mi e Occidental Comment
  UC1076042  Streptanthus drepanoides Herbert L. Mason 1947-5-18 14794 Tehama w Paskenta; Paskenta Grade, Barrett Springs Comment
  POM257209  Streptanthus glandulosus H. L. Mason 1938-5-1 11747 Lake Bartlett Mountain, about 4 miles from Lucerne 1159 Comment
  UC1081569  Streptanthus glandulosus subsp. glandulosus Herbert L. Mason 1936-4-26 11091 Lake e side Bartlett Mountain 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
  UC592147  Streptanthus glandulosus subsp. glandulosus H. L. Mason 1929-4-29 5244 Lake 3 mi w Lakeport (on road to Hopland) Comment
  UC629717  Streptanthus polygaloides H. L. Mason May 15 1936-May 16 1936 11118 Mariposa summit of road between Coulterville and Bagby 701 Comment
  UC1292652  Streptanthus tortuosus Charles T. Mason Jr. 1949-5-10 Mariposa between Coulterville and Bagby Comment
  UC592159  Streptanthus tortuosus var. orbiculatus Herbert L. Mason 1926-5-30 3322 El Dorado near road to Fallen Leaf Lake; Lake Tahoe Comment
  UCD138321  Stuckenia striata Herbert L. Mason 1947-8-15 13540 Modoc Mouth of Crane Creek on Willow Ranch, east side of Goose Lake. Comment
  UCD138322  Stuckenia striata Herbert L. Mason; S. Galen Smith 1948-8-11 8327 Merced Crane Ranch, south of junction of Merced and San Joaquin Rivers. Comment
  UC1051483  Stylocline gnaphaloides Herbert L. Mason 1952-4-7 14208 Riverside Palm Canyon Palm Springs Comment
  UC1077076  Stylocline gnaphaloides Herbert L. Mason 1938-5-7 11783 Santa Barbara Burton Mesa Comment
  UC1111556  Stylocline gnaphaloides Herbert L. Mason 1947-4-25 13207 Santa Cruz near Felton; Mission Springs Comment
  UC1111578  Stylocline gnaphaloides Herbert L. Mason 1938-5-7 11771 Santa Barbara Burton Mesa Comment
  CAS-BOT-BC323010  Stylocline masonii H. L. Mason 1935-3-30 8252 San Luis Obispo Cholame Valley Comment
  CAS-BOT-BC5535  Stylocline masonii Herbert L. Mason 1935-3-30 8241 Kern Plains west of Bakersfield Comment
  CAS-BOT-BC422985  Stylomecon heterophylla H. L. Mason 1930-10-25 5775 Monterey Along the San Antonio River, between Jolon and Santa Lucia Range station in the foothills of the Santa Lucia Mountains Comment
  UC566954  Styrax officinalis var. redivivus H. L. Mason 1931-5-9 5876 Shasta Pitt River Comment
  UC1199814  Suaeda californica Herbert L. Mason 1928-9-2 4944 Alameda Bay Farm Island Comment
  UC1093857  Suaeda taxifolia Herbert L. Mason 1927-11-27 4144 Santa Barbara Carpenteria Comment
  UC1076035  Swertia albicaulis var. nitida Herbert L. Mason 1947-5-15 14751 Shasta 1 mi s Boulder Creek (between La Moine and Dunsmuir) Comment
  UC1191852  Symphoricarpos rotundifolius var. rotundifolius Herbert L. Mason 1948-7-18 13619 Modoc Cedar Pass; Warner Mountains Comment
  UC1192075  Symphyotrichum frondosum Herbert L. Mason 1948-9-4 13643 Mono Rush Creek Mono Lake Comment
  UC1195915  Symphyotrichum spathulatum Herbert L. Mason 1958-8-9 14896 Tuolumne w of, (meadow at Swamp Lake) Hetch Hetchy Dam; Sierra Nevada, Yosemite National Park, Swamp Lake 1584 Comment
  UC912291  Symphyotrichum spathulatum H. L. Mason 1923-8-22 760 a Tuolumne ridge w of Third Lake; Sierra Nevada Mountains, Yosemite National Park, Lyell Fork Comment
  UC672248  Symphyotrichum subulatum Herbert L. Mason 1923-10-6 768 Napa Suisun Marsh, along railroad Suisun Marsh Comment
  CAS-BOT-BC98367  Symphyotrichum subulatum var. parviflorum Herbert L. Mason 1955-8-12 14646 Yolo Between Winters and Madison Comment
  UC1179025  Tamarix ramosissima Herbert L. Mason 1952-4-9 14226 San Bernardino 25 mi s Needles (on road from Blythe to Needles) Comment
  UCD101705  Tamarix ramosissima Herbert L. Mason 1952-4-9 14226 San Bernardino Twenty-five miles south of Needles on road from Blythe to Needles. Comment
  UC1177525  Taraxia subacaulis Herbert L. Mason, B. Fuller, and H. Whisler 1958-6-29 11 Nevada 1 mi w University of California Trout Laboratory (12 mi n of Truckee); Sierra Nevada, Sage Hen Creek 1981 Comment
  UC1191747  Taraxia tanacetifolia Herbert L. Mason 1947-8-13 13523 Modoc n Canby (ne side of reservoir); F Reservoir Comment
  UC566897  Tauschia parishii H. L. Mason 1926-4-27 3025 Los Angeles Rock Creek Comment
Read comments
Jan 29 2016
  UC566901  Tauschia parishii H. L. Mason 1927-6-14 3764 Los Angeles camp mouth of Icehouse Canyon mouth of Icehouse Canyon; San Gabriel Mountains, mouth of Icehouse Canyon 1889 Comment
  UC570922  Tellima grandiflora H. L. Mason Jun 1930 5666 Sonoma mouth of Gualala River Comment
  CAS-BOT-BC399916  Thalictrum sparsiflorum H. L. Mason 1923-8-1 680 Tuolumne Lyell Fork, Sierra Nevada Mountains Comment
  UC570913  Tiarella trifoliata var. unifoliata Herbert L. Mason 1927-7-31 4003 Santa Cruz Bean Creek Mt. Herman; Santa Cruz Mts., , Bean Creek Comment
  GH381229  Tiarella unifoliata H. L. Mason 1925-10-25 2243 a Unknown Big Basin Comment
  UC1275783  Tiquilia nuttallii Herbert L. Mason 1963-7-4 15223 Mono Sulphur Springs near Artesian Well (n.e. shore of Mono Lake); Mono Lake Comment
  UC1083322  Torreya californica Herbert L. Mason 1925-12-30 2559 Mendocino Hopland, Cloverdale Cloverdale, Hopland Comment
  UC672449  Torreya californica H. L. Mason 1927-7-28 3981 Santa Clara Stevens Creek Comment
Read comments
Sep 21 2011
  CAS-BOT-BC519588  Triantha occidentalis subsp. occidentalis Herbert L. Mason 1950-7-15 14052 Trinity Summit of grade, Scott Mountain Comment
  UC632772  Trichophorum clementis Herbert L. Mason 1936-7-26 11387 Tuolumne w Gaylor Lakes (Moraine Flat); Yosemite National Park, w of Gaylor Lakes, Moraine Flat 2987 Comment
  UC570718  Trichostema lanceolatum Herbert L. Mason 1923-11-12 854 Contra Costa Mount Diablo, middle slopes Comment
  UC672596  Trichostema lanceolatum Herbert L. Mason 1930-10-25 5786 Monterey along San Antonio River, between Jolon and Santa Lucia Ranger Station foothills of the Santa Lucia Mountains Comment
  UC1191154  Trichostema laxum Herbert L. Mason 1936-9-19 11540 Napa St. Helena Creek Comment
  UC555481  Trifolium albopurpureum var. albopurpureum H. L. Mason 1928-4-26 4384 Contra Costa Berkeley-Oakland hills Comment
  UC555485  Trifolium albopurpureum var. albopurpureum H. L. Mason 1929-3-24 5109 Madera 18 mi e Madera (junction of Yosemite Rd) Comment
  UC555486  Trifolium albopurpureum var. albopurpureum H. L. Mason 1929-3-29 5119 Contra Costa Mt. Diablo 762 Comment
  UC555491  Trifolium albopurpureum var. albopurpureum H. L. Mason 1929-4-29 5236 Lake 2.9 mi w Lakeport (e base of rd from Hopland to Lakeport) Comment
  UC555479  Trifolium albopurpureum var. dichotomum H. L. Mason 1928-5-6 4569 Alameda Cedar Mountain Comment
  UC555603  Trifolium barbigerum H. L. Mason 1928-4-28 4392 Marin Tiburon Peninsula Comment
  UC1076192  Trifolium barbigerum Herbert L. Mason 1934-4-28 8095 Sonoma Hwy betw Healdsburg and Santa Rosa Comment
  UC555495  Trifolium barbigerum H. L. Mason 1927-4-26 5220 Marin w Bolinas Ridge (in bog at base of rd where stream empties into Bay) Comment
  JEPS65919  Trifolium barbigerum var. andrewsii H. L. Mason 1931-4-12 Sonoma Fulton Comment
  UC555456  Trifolium ciliolatum H. L. Mason 1929-4-25 5204 Contra Costa Marsh Creek Rd Comment
  UC555458  Trifolium ciliolatum H. L. Mason 1928-4-15 4352 Alameda e end Moraga Ridge Comment
  UC1101403  Trifolium cyathiferum Herbert L. Mason 1948-7-17 13604 Siskiyou eastern Grass Lake Comment
  UC555455  Trifolium eriocephalum var. eriocephalum H. L. Mason 1931-5-9 5868 Siskiyou 5 mi n Yreka Comment
  UC555597  Trifolium eriocephalum var. eriocephalum H. L. Mason 1929-5-18 5332 Siskiyou s Yreka Comment
  UC555451  Trifolium fucatum Herbert L. Mason 1926-3-20 2749 Sonoma s Calistoga (along rr right-of-way) Comment
  UC1111533  Trifolium longipes var. nevadense Herbert L. Mason 1936-8-6 11504 Mariposa Peregoy Meadow, Glacier Point Rd Sierra Nevada, Yosemite National Park 2255 Comment
  UC555619  Trifolium macraei H. L. Mason 1928-4-13 4303 Contra Costa Richmond waterfront Comment
  UC555609  Trifolium microdon H. L. Mason 1928-4-28 4406 Marin Tiburon peninsula Comment
  UC555614  Trifolium oliganthum H. L. Mason 1928-5-6 4560 Alameda Cedar Mtn Comment
  UC555403  Trifolium oliganthum H. L. Mason 1929-3-29 5131 Contra Costa 2 mi above Clayton (Marsh Creek Rd) Comment
  UC632762  Trifolium variegatum H. L. Mason 1938-7-22 11975 Tuolumne n Hetch Hetchy (Vernon Lake Trail); Sierra Nevada, Yosemite National Park 2072 Comment
  UC555377  Trifolium variegatum var. melananthum H. L. Mason 1928-4-13 4311 Marin n San Rafael Comment
  UC555587  Trifolium variegatum var. variegatum H. L. Mason 1928-5-4 4492 El Dorado near Latrobe (Swift Ranch) Comment
  UC555570  Trifolium wormskioldii H. L. Mason 1925-7-4 2145 Tuolumne Mather Sierra Nevada, Yosemite National Park Comment
  UC1099957  Triglochin maritima Herbert L. Mason, Verne Grant 1947-7-12 13438 Modoc n Likely (Corporation Ranch Headquarters); , n of Likely Comment
  UC1039622  Trillium angustipetalum Herbert L. Mason 1940-7-7 12327 Tuolumne s. of Miguel Meadow and Swamp Lake (Poison Meadow); Poison Meadow Comment
  UC672067  Trillium angustipetalum Herbert L. Mason 1925-7-30 2188 Tuolumne n.e. Mather (Smith Peak Trail) Comment
  CAS-BOT-BC519107  Trillium chloropetalum var. chloropetalum H. L. Mason 1917-4-4 80 Marin Tocaloma Comment
  SEINET10840595  Triodanis biflora Mason Mason 3199 Riverside TEMECULA Comment
  UC673427  Triphysaria eriantha subsp. eriantha H. L. Mason 1926-3-21 2759 Lake Toll House Canyon between Middletown and Mount St. Helena; Toll House Canyon btw Middletown and Mount St. Helena Comment
  UC673431  Triphysaria eriantha subsp. eriantha H. L. Mason 1925-3-23 1309 Alameda Sunol Comment
  UC1191179  Triphysaria eriantha subsp. rosea Herbert L. Mason 1940-5-22 12305 Mendocino headland n of Pudding Creek Slough; (near Fort Bragg) Comment
  UC1178990  Triphysaria micrantha Herbert L. Mason 1938-4-14 11708 Tulare 4 mi e Exeter Comment
  UC673447  Triphysaria pusilla H. L. Mason 1924-5-13 1013 Alameda Berkeley Hills Comment
  UC673453  Triphysaria versicolor subsp. faucibarbata H. L. Mason 1928-3-24 4267 Marin Millerton Tomales Bay (Tomales Bay) Comment
  UC1178864  Triphysaria versicolor subsp. versicolor Herbert L. Mason 1940-5-22 12304 Mendocino headland n Pudding Creek Slough ((near Fort Bragg)); headland n of Pudding Creek Slough Comment
  UC635224  Triteleia ixioides subsp. anilina H. L. Mason 1923-7-16 611 Tuolumne Hog Ranch Sierra Nevada Mountains, Yosemite National Park 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-BC524333  Triteleia ixioides subsp. ixioides H. L. Mason 1921-5-1 s.n. Monterey Rancho del Monte, Carmel River Comment
  UC1077074  Triteleia ixioides subsp. scabra Herbert L. Mason 1938-5-10 11818 Tulare near Auckland 457 Comment
  UC1178891  Triteleia laxa Herbert L. Mason 1940-5-5 12273 Merced w of Ortegalita; Inner South Coast Range, Piedra Azul Creek Comment
  JEPS54271  Tropidocarpum capparideum Herbert L. Mason 1920-3-27 5115 Alameda fields behind Mountain House (Altamont Pass); Altamont Pass Comment
  UC673302  Tropidocarpum gracile H. L. Mason 1932-3-20 6842 Contra Costa Antioch sand hills Comment
  UC1056991  Tuberaria guttata Herbert L. Mason 1936-4-11 11078 Calaveras Comanche Comment
  UC1240187  Typha Herbert L. Mason 1947-6-26 13257 Solano Cordelia Slough Suisun Marsh; , Cordelia Slough Comment
  UC1093861  Typha angustifolia Herbert L. Mason 1937-6-17 11543 Alameda Thornhill Pool Oakland Comment
  UCD94646  Typha angustifolia Herbert L. Mason 1937-6-17 11543 Alameda Thornhill Pool, Oakland. Comment
  UC1241759  Typha domingensis Herbert L. Mason 1948-6-29 13576 San Joaquin one mi n Tracy; San Joaquin Valley Comment
  CAS-BOT-BC91181  Umbellularia californica H. L. Mason 1925-12-30 2558 Mendocino Hopland, Cloverdale Grade. Comment
  UC635506  Umbellularia californica H. L. Mason 1925-12-30 2558 Mendocino Hopland, Cloverdale Grade Cloverdale Grade; Hopland, Cloverdale Grade Comment
  POM312398  Utricularia gibba H. L. Mason, Verne Grant 1941-9-27 13137 a Butte Three miles west of Biggs. Comment
  UC1101458  Utricularia gibba Herbert L. Mason 1945-8-24 12670 Lake Boggs Lake Comment
  UC1101468  Utricularia gibba Herbert L. Mason 1938-7-9 11888 Tuolumne w. Hetch Hetchy Dam (just s. of Miguel Meadows, Swamp Lake, Yosemite Nat'l Park); Yosemite Nat'l Park, Swamp Lake 1584 Comment
  UC635677  Utricularia gibba H. L. Mason 1929-9-21 5441 Contra Costa 1 mi. n. from junction of Borden Hwy. and rd. to Antioch Comment
  UC635680  Utricularia intermedia Herbert L. Mason 1924-6-26 1090 Plumas Graeagle near Blairsden; Graeagle Comment
  YM-YOSE66550  Utricularia vulgaris Harry L. Mason 1938-7-10 11916 Tuolumne SWAMP LAKE RESEARCH RESERVE, SOUTH ISLAND OF LAKE Comment
  CAS-BOT-BC193383  Vaccinium ovatum H. L. Mason 1928-4-8 4289 a Sonoma Two miles north of Fort Ross. Comment
  UC571028  Vaccinium ovatum H. L. Mason Jun 1930 5630 Mendocino Fort Bragg Comment
  UC634721  Vaccinium ovatum Herbert L. Mason 1927-7-30 3989 Monterey Cypress Point Comment
  GH363251  Vaccinium parvifolium H. L. Mason 1925-10-25 2244 Unknown Woodwardia Creek, Big Basin Comment
  UC571026  Vaccinium parvifolium H. L. Mason Jun 1930 5636 Mendocino Fort Bragg Comment
  UC912416  Vaccinium parvifolium Herbert L. Mason 1928-7-11 4892 Sonoma 2 miles north of Fort Ross Comment
  SEINET1008892  Verbena hastata Herbert L. Mason 1947-1 13502 Modoc On Highway 81, north of Modoc-Lassen County line. Comment
  UC769972  Veronica peregrina subsp. xalapensis Herbert L. Mason 1934-3-25 7956 Sacramento Sacramento Valley, Rio Linda, Keithly Ranch Rio Linda; Sacramento Valley, , Keithly Ranch Comment
  UC964735  Veronica peregrina subsp. xalapensis H. L. Mason 1925-6-25 2113 Tuolumne Mather, Hog Ranch Hog Ranch; Mather, Hog Ranch Comment
  UC965647  Veronica peregrina subsp. xalapensis Herbert L. Mason 1952-7-16 14368 Nevada 1 mi w of University of California Trout Laboratory (Sage Hen Creek); Sierra Nevada, Sage Hen Creek 1981 Comment
  UC672497  Veronica persica H. L. Mason 1927-4-12 3665 Alameda University of California, Berkeley, LeConte Oak Berkeley; University of California, , LeConte Oak Comment
  JEPS19312  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
  UC1195917  Veronica scutellata Herbert L. Mason 1958-8-9 14849 Tuolumne w of Hetch Hetchy DAm (Swamp Lake, Yosemite National Park); Sierra Nevada, Yosemite National Park, Swamp Lake 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
  UC1076193  Vicia americana var. americana Herbert L. Mason 1925-7-4 2141 Tuolumne Mather; Sierra Nevada 1432 Comment
  UC673611  Vicia americana var. americana Herbert L. Mason 1927-4-23 3675 a San Mateo summit of road from La Honda to Pescadero Creek 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
  UC673605  Vicia sativa subsp. nigra Herbert L. Mason 1926-3-20 2750 Sonoma s of Calistoga (marshes, along railroad right-of-way) Comment
  CAS-BOT-BC270185  Viola adunca H. L. Mason 1925-7-16 2170 Tuolumne Hog Ranch, near Mather Comment
  RSA77752  Viola adunca H. L. Mason 1923-7-9 579 Tuolumne Mather. Comment
  UC1101418  Viola adunca Herbert L. Mason 1946-5-19 12799 Mendocino n of Fort Bragg; Cleone Lake Comment
  UC581495  Viola adunca H. L. Mason 1928-4-8 4279 Sonoma Fort Ross Comment
  UC581488  Viola beckwithii H. L. Mason 1933-5-28 7239 Placer Lower Truckee River Comment
  UC581498  Viola douglasii H. L. Mason 1929-3-15 5072 Santa Clara San Antonio Valley; Mount Hamilton Range Comment
  SEINET196255 Image available Viola douglasii H. L. Mason 1934-3-25 7946 Sacramento Keithly ranch Rio Linda Comment
  JEPS19309  Viola hallii Herbert L. Mason 1947-5-17 14781 Trinity 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
  UC1076031  Viola lobata subsp. lobata Herbert L. Mason 1947-5-17 14772 Unknown Scott Mountain divide Comment
  UC581496  Viola pedunculata H. L. Mason 1929-3-1 5017 Monterey 25 miles up the Carmel River (Jamesburg-Arroyo Seco Road) Comment
  UC581524  Viola pinetorum subsp. pinetorum H. L. Mason 1923-7-28 666 Mariposa Porcupine Flat, Tioga Pass Road Porcupine Flat Comment
  UC570904  Whipplea modesta Herbert L. Mason 1932-7-21 7112 Humboldt on road from Arcata to Weaverville (e slope of mts.); Southfork Mountains Comment
  RSA125803  Wolffia borealis H. L. Mason 1955-6-8 14629 Shasta At the bridge, west edge of Fall River Mill Comment
  UC635135  Wolffiella lingulata H. L. Mason 1937-6-21 11548 San Joaquin 0.5 mi sw Holt, Roberts Island (Trappers Slough); Trappers Slough Comment
  UC635136  Wolffiella lingulata H. L. Mason 1938-6-12 11850 San Joaquin 1 mi ne Middle River bridge, Roberts Island (Trappers Slough, delta of the San Joaquin River); San Joaquin River, Trappers Slough Comment
  UC600961  Woodsia scopulina H. L. Mason 1938-7-26 12016 Tuolumne s of Jack Main Meadows (Andrew Peak); Yosemite Nat'l Park 2438 Comment
  CAS-BOT-BC77775  Woodsia scopulina Herbert L. Mason 1938-7-26 12016 Tuolumne Andrew Peak, south of Jack Main Meadows 2438 Comment
  UC1093880  Wyethia angustifolia Herbert L. Mason 1938-7-22 11979 Tuolumne n Hetch Hetchy (Vernon Lake Trail, Yosemite National Park); Sierra Nevada, Yosemite National Park 2072 Comment
  CAS-BOT-BC383360  Wyethia helenioides H. L. Mason 1921-5-14 s.n. Alameda Haywards [Hayward] Comment
  UC632873  Wyethia helenioides H. L. Mason 1936-4-10 11048 Calaveras road between Murphy's and Angel's Camp Comment
  UC672292  Xylorhiza tortifolia var. tortifolia H. L. Mason 1926-4-26 3016 Los Angeles Little Rock Comment
  UC566872  Yabea microcarpa H. L. Mason June 1930 5656 Sonoma Mouth of Gualala River Comment
  UC1099965  Zannichellia palustris Herbert L. Mason and Malcolm A. Nobs 1948-7-14 113 Merced pond ca. 3 mi. n. Los Banos (along Old Santa Fe grade); Old Santa Fe grade Comment
  UC1099980  Zannichellia palustris Herbert L. Mason and Verne Grant 1947-7-10 13352 Modoc 2 mi. e. Alturas (pasture land 1/4 mi. w. of Dorris Reservoir) Comment
  UC1099981  Zannichellia palustris Herbert L. Mason and Verne Grant 1947-7-8 13282 Lake near junction of Williams hwy. and Upper lake hwy. Bear Creek Comment
  UC1099983  Zannichellia palustris Herbert L. Mason and Verne Grant 1947-7-8 13280 Lake near junction of Williams hwy. and Upper lake hwy. Bear Creek Comment
  UC1099994  Zannichellia palustris Herbert L. Mason 1928-4-13 4323 Sonoma marsh & pools near Petaluma Comment
  CAS-BOT-BC456160  Zannichellia palustris Herbert L. Mason 1928-4-13 4323 Sonoma Near Petaluma Comment
  UC1099987  Zannichellia palustris Herbert L. Mason 1932-4-24 6965 Contra Costa Borden Hwy. near Marsh Creek Rd. Comment
  UCD138293  Zannichellia palustris Herbert L. Mason; Verne Grant 1947-7-12 13427 Modoc North of Likely. Comment
  CAS-BOT-BC530485  Zigadenus fremontii H. L. Mason 1917-3-10 56 Alameda Lake Temescal Comment
  SEINET12044400  Zigadenus fremontii H. L. Mason 1921-1 s.n. San Mateo Pescadero, La Honda Road on Pescadero Creek Comment



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