Search Results — 2000 specimen records retrieved (1559 records with coordinates)
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 Please cite data retrieved from this page: Data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/cch_archive/).
 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
  UC912528  Abronia Herbert L. Mason 1924-11-16 1152 Marin Stinson beach, Willow Camp Comment
  UC912625  Abronia villosa H. L. Mason 1928-3-10 4193 Riverside Whitewater River Comment
  UC964730  Acanthomintha lanceolata Herbert L. Mason 1940-5-5 12284 San Benito 6 mi se of Pacines (and 2.4 mi e of Emmet School, Panoche Pass); Inner South Coast Ranges, San Carlos Range, Panoche Pass 609 Comment
  RSA0076521  Acanthomintha lanceolata H. L. Mason 1940-5-5 12284 San Benito Panoche Pass ca. 6 miles southeast of Pacines and 2.4 miles east of Emmet School, San Carlos Range. 610 Comment
  SEINET12344129  Acanthus mollis E. Mason, Mason, R. E. 1946-1 s.n. Unknown Oakland 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
  UC912589  Achyrachaena mollis Herbert L. Mason 1926-4-10 2802 Alameda Cedar Mountain (via Arroyo Mocho Canyon); Arroyo Mocho Canyon, Cedar Mountain Comment
  SEINET10881474  Aconogonon davisiae Herbert L. Mason 1940-7-30 Mason 12353 Alpine Hills N of Carson Pass. 2682 Comment
  UC571024  Acourtia microcephala Herbert L. Mason 1923-6-17 471 Ventura bluffs along coast Ventura Comment
  CAS-BOT-BC29260  Acroptilon repens Herbert L. Mason 1942-7-8 12553 Stanislaus 2 miles east of Newman, at junction of Patterson-Stevinson roads Comment
  UCD128509  Acroptilon repens Herbert L. Mason 1942-7-8 12553 Stanislaus two miles east of Newman, at junction of Patterson-Stevinson roads. Comment
  UC635417  Actaea rubra H. L. Mason 1927-7-31 4006 Santa Cruz Santa Cruz Mts., Mt. Herman Comment
  UC555433  Adenostoma fasciculatum H. L. Mason 1927-9-25 4107 Santa Barbara hills about Pelican Bay; Santa Cruz Isl. Comment
  UC912686  Adiantum jordanii Herbert L. Mason 1936-3-21 11035 Mariposa 4 mi n Coulterville Comment
  UC635203  Aesculus californica H. L. Mason 1929-6-2 5358 Kern 30 mi from Bakersfield; Tehachapi Mountains, Tejon Pass 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
  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
  UC635120  Agoseris hirsuta H. L. Mason 1928-3-24 4263 a Marin Millerton; Tomales Bay Comment
  UC1110539  Agrostis exarata Herbert L. Mason 1939-8-3 12206 Placer 7 mi nw Tahoe City (Squaw Valley); Squaw Valley 1889 Comment
  UC965490  Agrostis idahoensis Herbert L. Mason 1952-8-16 14486 b Nevada meadow opposite University of California, Trout Laboratory; Sierra Nevada, Sage Hen Creek 1981 Comment
  UCD53045  Agrostis microphylla Herbert L. Mason 1946-5-18 12763 Mendocino Clearing in Pygmy Forest, near Fort Bragg. Comment
  UC1100123  Agrostis scabra Herbert L. Mason 1948-9-5 13678 Mono island in Mono Lake Mono Lake Comment
  UC965489  Agrostis scabra Herbert L. Mason 1952-8-16 1448 a Nevada meadow opposite Univ. of Calif. Trout Laboratory; Sierra Nevada, Sage Hen Creek 1981 Comment
  UC912585  Agrostis viridis Herbert L. Mason 1929-5-24 3232 Alameda University of Calif. Campus Berkeley Comment
  UC1108514  Aira caryophyllea H. L. Mason 1921-5-29 San Mateo roadside near Arroyo de los Frijoles Comment
  UCD117513  Aliciella subacaulis Herbert L. Mason 1941-7-13 12485 Mono North of Mono Lake along road to Bodie. Comment
  UCD137895  Alisma gramineum Herbert L. Mason 1955-8-13 14653 B Modoc southwest side of Goose Lake. Comment
  UCD137905  Alisma gramineum Herbert L. Mason 1955-8-13 14651 A Modoc southwest side of Goose Lake. Comment
  UC985647  Alisma lanceolatum Herbert L. Mason and Verne Grant 1946-9-5 13119 Colusa 1.6 mi w Williams (road to Lake County) Comment
  CAS-BOT-BC445317  Alisma lanceolatum Herbert L. Mason; Verne Grant 1946-9-5 13119 Colusa Road to Lake County, 1.6 miles west of Williams Comment
  UCD137995  Alisma triviale Herbert L. Mason; Lawrence W. Reinecke 1937-7-22 11610 Tulare Swamp Lake, west of Hetch Hetchy, Yosemite National Park. 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
  UCD137997  Alisma triviale Herbert L. Mason 1955-8-13 14653 C Modoc southwest side of Goose Lake. Comment
  UCD137998  Alisma triviale Herbert L. Mason 1955-8-13 14651 B Modoc southwest side of Goose Lake. Comment
  UC1178813  Allium acuminatum Herbert L. Mason 1947-7-8 13321 Modoc Cedar Pass, summit of Warner Mountains Warner Mountains, Cedar Pass 1921 Comment
  UC623310  Allium amplectens H. L. Mason 1939-5-18 12102 Napa w Napa (near summit of Wooden Valley Grade); Wooden Valley Grade 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
  UC635261  Allium campanulatum H. L. Mason 1924-6-15 1033 Plumas Graeagle Comment
  UC635207  Allium crispum H. L. Mason 1930-4-21 5600 San Benito Priest Valley Comment
  UC1076030  Allium falcifolium Herbert L. Mason 1947-5-17 14764 Siskiyou on Scott Mountain road 5 mi s Callahan Comment
  UC635571  Allium fimbriatum var. fimbriatum H. L. Mason 1929-4-29 5258 Lake between Middletown and Lower Lake Comment
  CAS-BOT-BC469352  Allium fimbriatum var. fimbriatum H. L. Mason 1926-4-26 3022 Los Angeles Near Rock Creek, north side of San Gabriel Mountians Comment
  UC635254  Allium monticola H. L. Mason 1923-6-18 491 Ventura Topatopa Mountain Comment
  JROH4556  Allium peninsulare var. franciscanum H. L. Mason 1921-5-13 s.n. San Mateo Jasper Ridge Biological Preserve, Stanford University. 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
  UC635245  Allium serra H. L. Mason 1932-4-17 6934 Santa Clara New Almaden Comment
  UC635249  Allium serra H. L. Mason 1929-3-29 5135 Contra Costa Marsh Creek Road 2 mi e Claton; Marsh Creek Road Comment
  UC635252  Allium serra H. L. Mason 1929-4-7 5187 Stanislaus about 10 mi e Oakdale; Sierra Nevada Foothills Comment
  UC908937  Allophyllum divaricatum Herbert L. Mason 1934-5-5 8114 Lake e. side Mt. Konocti Comment
  UC963786  Allophyllum divaricatum Herbert L. Mason 1945-6-29 12614 Lake 3 mi. s. Kelseyville Comment
  UCSB37259  Allophyllum divaricatum Mason, H. 1938-7-7 Mariposa Brecca Ridge South of Swamp Lake; Yosemite Comment
  UC908478  Allophyllum gilioides subsp. gilioides Herbert L. Mason 1928-1 4427 Contra Costa s. slope Mt. Diablo (Sycamore Canyon); , Sycamore Canyon Comment
  UC665615  Allophyllum gilioides subsp. violaceum Herbert L. Mason 1941-7-16 12487 El Dorado s. Lake Tahoe (Cold Creek); Sierra Nevada, Cold Creek 2286 Comment
  UC908633  Allophyllum gilioides subsp. violaceum Herbert L. Mason 1939-7-7 12159 Nevada 3 mi. w. Donner Summit 2072 Comment
  UCR111260  Allophyllum gilioides subsp. violaceum H. L. Mason 1941-7-16 12487 El Dorado Sierra Nevada Mtns., Cold Creek, south of Lake Tahoe. 1912 Comment
  UC907868  Allophyllum glutinosum Herbert L. Mason 1923-6-16 445 Santa Barbara Rattlesnake Canyon trail to La Cumbre Peak (Santa Barbara); Santa Barbara 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
  POM264342  Allophyllum violaceum H. L. Mason 1941-7-16 12487 El Dorado Cold Creek, south of Lake Tahoe 2287 Comment
  SEINET8130302 Image available Alnus incana H. L. Mason 1939-1 12172 Unknown Comment
  SBBG28462  Alnus incana subsp. tenuifolia H. L. Mason 1939-7-18 12172 El Dorado N side of Luther Pass, 1 mi W of Grass Lake Meadow 2346 Comment
  UC629713  Alnus incana subsp. tenuifolia Herbert L. Mason 1939-7-18 12172 El Dorado 1 mi w Grass Lake Meadow (n side of pass); Luther Pass 2346 Comment
  UC1093921  Alnus rhombifolia Herbert L. Mason 1925-7-30 2187 Tuolumne Smith Peak Trail from Mather Comment
  UC1093922  Alnus rhombifolia Herbert L. Mason 1924-11-23 1159 Contra Costa Las Trampas Ridge; via Cashion Comment
  SEINET10478510  Alnus tenuifolia Herbert L. Mason 1939-7-18 Mason 12172 El Dorado North side of Luther Pass, one mile west of Grass Lake Meadow. 2347 Comment
  UC1100226  Alopecurus geniculatus Herbert L. Mason and Verne Grant 1947-7-12 13396 Modoc several mi. s. Alturas (irrgation ditch by Jones' Lane, off Hwy. 395) Comment
  UC936194  Alopecurus saccatus H. L. Mason 1932-4-24 6969 San Joaquin 11 mi. s. Clements Comment
  UC1191387  Amaranthus albus Herbert L. Mason and S. Galen Smith 1948-7-29 8248 Merced e of Los Banos (at end of Turner Island Road); Turner Island Comment
  UC1191388  Amaranthus albus Herbert L. Mason and S. Galen Smith 1948-7-29 8248 Merced e of Los Banos (at end of Turner Island Road); Turner Island Comment
  UC1191385  Amaranthus retroflexus Herbert L. Mason, Verne Grant 1947-7-10 13343 Modoc Dorris Reservoir, 2 miles east of Alturas Comment
  GH346789  Amelanchier alnifolia H. L. Mason 1928-5-3 4490 Unknown Near bridge of Cosumnes River at mouth of Clark Creek Comment
  UC1199870  Amelanchier utahensis Herbert L. Mason 1923-6-18 504 Ventura Timber Creek canyon Topatopa Mountains, Sespe Creek (a tributary of Sespe Creek) Comment
  UC555320  Amelanchier utahensis H. L. Mason 1928-5-3 4490 El Dorado mouth of Clark Creek Clark Creek (near bridge of Cosumnes River) Comment
  UC1191563  Ammannia coccinea Herbert L. Mason 1945-9-19 12739 Butte n.w. Pennington (Gray Lodge Game Refuge); Gray Lodge Game Refuge Comment
  UCD102896  Ammannia robusta H. L. Mason; Verne Grant 1945-7-10 12633 Butte Butte Sink. Butt Creek, N of Marysville Buttes, Grey Lodge Game Refuge, southern. Comment
  UC573136  Amsinckia tessellata var. gloriosa H. L. Mason 1932-3-19 6831 San Joaquin 2 mi e Midway Comment
  UC1179098  Anaphalis margaritacea Herbert L. Mason Jul 7 1939-Jul 8 1958 12152 Nevada 3 mi w Donner Summit 2072 Comment
  UC912487  Anaphalis margaritacea Herbert L. Mason 1922-7-19 311 Tuolumne Lodge Meadow Comment
  CAS-BOT-BC64146  Ancistrocarphus filagineus Herbert L. Mason 1952-4-27 14286 San Benito About 3 miles from mouth of San Carlos Canyon Comment
  UC1051471  Ancistrocarphus filagineus Herbert L. Mason 1952-4-27 14286 San Benito ca 3 mi from mouth San Carlos Canyon Comment
  UC1060647  Ancistrocarphus filagineus Herbert L. Mason 1957-5-11 14697 San Benito 2-3 mi e Hernandez Comment
  UC1111020  Ancistrocarphus filagineus Herbert L. Mason 1935-5-2 8378 Kern Havilah; Kern River drainage Comment
  UC1111574  Ancistrocarphus filagineus Herbert L. Mason 1938-5-8 11794 Santa Barbara on rd to, (serpentine outcrop) Figueroa Mountain 1066 Comment
  UC673625  Ancistrocarphus filagineus H. L. Mason 1933-4-30 7233 Lake 10 mi n, on rd to Middleton Pope Valley Comment
  UC1111009  Androsace elongata subsp. acuta Herbert L. Mason 1928-3-4 4166 Contra Costa Shell Ridge Comment
  RSA84449  Anemone grayi H. L. Mason 1927-4-24 3698 San Mateo La Honda Comment
  UC634954  Anemone oregana H. L. Mason 1932-4-28 7025 Santa Cruz Soquel Canyon; Santa Cruz Mtns Comment
  UC672439  Anemopsis californica Herbert L. Mason 1926-4-25 2902 Orange near Laguna Comment
  CAS-BOT-BC64752  Anisocoma acaulis H. L. Mason 1932-4-2 6897 Kern 3 miles west of Muroc, Mojave Desert Comment
  CAS-BOT-BC63958  Antennaria argentea Herbert L. Mason 1936-7-12 11240 Mariposa Peregoy Meadow, Glacier Point road 2255 Comment
  UC912217  Antennaria argentea Herbert L. Mason 1925-6-27 2118 Tuolumne near, (at Hog Ranch) Mather Comment
  CAS-BOT-BC59246  Antennaria corymbosa H. L. Mason 1923-7-30 675 Tuolumne Lyell Fork of the Tuolumne River Comment
  UC1076045  Antennaria dimorpha Herbert L. Mason 1947-5-17 14777 Trinity summit of, (Trinity-Siskiyou County line) Scott Mountain Grade Comment
  UC712403  Antennaria media Herbert L. Mason 1936-7-24 11344 Tuolumne Conness Range Sierra Nevada, Yosemite National Park, White Moutain, Connes 3505 Comment
  SEINET191758 Image available Antennaria rosea H. L. Mason 1939-7-8 12162 El Dorado NE end of Fallen Leaf Lake 1951 Comment
  SEINET10920153  Antennaria rosea Herbert L. Mason 1939-7-8 Mason 12162 El Dorado Open pine forest, northeast end of Fallen Leaf Lake. 1951 Comment
  UC1110536  Anthoxanthum aristatum Herbert L. Mason 1946-5-18 12766 Mendocino e of Mendocino City Comment
  UC672555  Antirrhinum coulterianum H. L. Mason 1926-4-26 2949 Los Angeles Pacoima Wash; San Gabriel Mountains Comment
  UC672564  Antirrhinum nuttallianum subsp. subsessile H. L. Mason 1926-4-25 2907 Orange 5 mi s Laguna Comment
  UC566820  Apiastrum angustifolium H. L. Mason 1930-3-30 5534 San Benito 14 mi below the Pinnacles (San Benito River Canyon); San Benito River Canyon Comment
  UC623308  Apocynum androsaemifolium H. L. Mason 1939-5-18 12103 Napa near summit of Wooden Valley Grade Comment
  UC907580  Apocynum cannabinum Herbert L. Mason 1942-1 Sacramento along dike of Sacramento R. near Walnut Grove Comment
  CAS-BOT-BC392038  Aquilegia eximia H. L. Mason 1933-9-24 s.n. Lake St. Helena Creek, east slope of Mount St. Helena Comment
  UC635104  Aquilegia eximia H. L. Mason 1933-9-24 Lake St. Helena Creek e slope of Mt. St. Helena Comment
  UC635108  Aquilegia pubescens H. L. Mason 1923-7-31 678 Tuolumne Dana Fork Sierra Nevada Mtns Comment
  JEPS14812  Arabidopsis thaliana H. L. Mason 1928-4-5 Alameda Berkeley, University grounds Berkeley; , University grounds Comment
  UC565469  Arabis blepharophylla H. L. Mason 1927-4-26 5216 Marin w of Alpine Lake (on road from Fairfax to crest of Bolinas Ridge); Bolinas Ridge Comment
  CAS-BOT-BC407766  Arceuthobium abietinum Herbert L. Mason 1924-6-26 1101 Tuolumne Ridge north of Middle Fork near Mather, Yosemite National Park 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
  GH350134  Arctostaphylos canescens H. L. Mason 1926-1-2 2612 Unknown near summit of Mountain. Toll House Canyon, Mount St. Helena 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
  UC571192  Arctostaphylos canescens subsp. canescens H. L. Mason 1925-12-31 2578 Lake via Clover Creek School Rd Upper Lake Comment
  UC571196  Arctostaphylos columbiana H. L. Mason 1932-7-21 7104 Humboldt Trinidad Head Comment
  UC571240  Arctostaphylos columbiana H. L. Mason 1932-8-28 7171 Mendocino Point Arena 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
Read comments
Jan 10 2014
  UC571080  Arctostaphylos myrtifolia H. L. Mason 1928-5-3 4468 Amador one mi s Ione Comment
  UC571081  Arctostaphylos myrtifolia H. L. Mason 1926-5-30 3339 Amador hill s Ione 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
  CAS-BOT-BC39928  Arctostaphylos nissenana H. L. Mason 1945-2-1 s.n. Placer Placerville Comment
  UC672656  Arctostaphylos nummularia H. L. Mason 1926-2-28 2677 Marin s slopes Mount Tamalpais Comment
  CAS-BOT-BC42238  Arctostaphylos pallida H. L. Mason 1925-1-11 1178 Alameda Oakland Hills Comment
  UCD53471  Arctostaphylos pechoensis var. viridissima H. L. Mason 1934-3-31 8055 Santa Barbara La Purrissima Ridge; north of Lompoc. Comment
Read comments
Dec 9 2008
  UC571085  Arctostaphylos pumila H. L. Mason 1923-6-23 570 Monterey Del Monte Comment
  UC1083190  Arctostaphylos rudis Herbert L. Mason 1937-2-21 11542 Santa Barbara near Lompoc Landing; Burton Mesa Comment
  UC1178859  Arctostaphylos rudis H. L. Mason 1938-5-7 11770 Santa Barbara nw Lompoc; Burton Mesa Comment
  UC571074  Arctostaphylos tomentosa subsp. bracteosa H. L. Mason 1931-11-1 5883 Monterey road between Monterey and Carmel Comment
  UC571203  Arctostaphylos tomentosa subsp. subcordata Herbert L. Mason 1927-9-25 4106 Santa Barbara Buena Vista Canyon Santa Cruz Island, Pine Ridge Comment
  UC634745  Arctostaphylos uva-ursi H. L. Mason 1930-3-9 5520 Marin summit of promontory Point Reyes Comment
  SEINET11988273  Arctostaphylos viscida G. Mason, Tucker, J. M.; Gankin, R. 1956-1 193 Calaveras 0.5 mi N of Mokalomne River behind high cliffs, right across river from Comanche Comment
  UC465583  Arenaria kingii var. glabrescens Herbert L. Mason 1938-7-26 12019 Tuolumne s Jack Main Meadows; Sierra Nevada, Yosemite National Park, Andrews Peak 2438 Comment
  UC1039630  Argemone corymbosa Herbert L. Mason 1935-4-30 8285 San Bernardino Poison Canyon Comment
  UC543751  Aristolochia californica H. L. Mason 1927-5-10 3717 Butte n.e. of Oroville (Coal Creek, Table Mt.); Table Mt.,Coal Creek Comment
  UC635028  Aristolochia californica Herbert L. Mason 1926-3-6 2683 Marin near Ross Comment
  UC1192153  Arnica chamissonis Herbert L. Mason 1948-7-18 13608 Siskiyou Grass Lake Comment
  UC1039990  Arnica dealbata Herbert L. Mason 1938-7-13 11951 Mariposa Wawona Point, Mariposa Grove Big Tree Sierra Nevada, Yosemite National Park 2133 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
  UC543764  Asarum caudatum Herbert L. Mason 1926-3-21 2778 Sonoma Middleton Road - Mt. St Helena; Lake Co. Comment
  CAS-BOT-BC400755  Asarum lemmonii Herbert L. Mason 1936-5-15 11132 Mariposa East fork of the Chowchilla River, Chowchilla Mountains 1463 Comment
  CAS-BOT-BC400756  Asarum lemmonii Herbert L. Mason 1936-5-15 11132 Mariposa East fork of the Chowchilla River, Chowchilla Mountains 1463 Comment
  UC543748  Asarum lemmonii Herbert L. Mason 1925-8-11 2213 Tuolumne Big Oak Flat Road near Tuolumne Grove Comment
  UC1039628  Asclepias californica Herbert L. Mason 1935-4-30 6263 Kern Hobo Hot Springs Kern River Canyon Comment
  SEINET197565  Asclepias vestita subsp. vestita Herbert L. Mason 1940-5-5 12274 Merced Twin Peaks, Los Banos Creek, San Carlos Range. 610 Comment
  SEINET955765  Asclepias vestita subsp. vestita Herbert L. Mason 1940-1 12274 Merced Twin Peaks. Los Banos Creek, San Carlos Range. 610 Comment
  CAS-BOT-BC54126  Asperugo procumbens Herbert Louis Mason; Verne Grant 1947-7-12 13416 Modoc Near S end of W Side Road, Pit River Valley, S of Alturas. 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
  CAS-BOT-BC182301  Astragalus didymocarpus var. didymocarpus H. L. Mason 1926-4-26 2963 Los Angeles Four miles west of Saugus Comment
  CAS-BOT-BC186726  Astragalus gambelianus H. L. Mason 1929-3-23 5098 Madera Hills back of Madera Comment
  UC635302  Astragalus gambelianus H. L. Mason 1928-4-26 4380 Contra Costa Berkeley-Oakland Hills Comment
  CAS-BOT-BC178471  Astragalus gambelianus H. L. Mason 1928-4-15 4345 Contra Costa East-facing grassy slope, Moraga Ridge Comment
  CAS-BOT-BC178472  Astragalus gambelianus H. L. Mason 1928-4-26 4380 Contra Costa Berkely - Oakland Hills Comment
  UC714404  Astragalus kentrophyta var. danaus Herbert L. Mason 1936-7-31 11468 Mono Tioga Crest e Saddlebag Lake (Tioga Pass region); Sierra Nevada, Tioga Pass Region, e of Saddlebag Lake 3474 Comment
  UC635310  Astragalus nuttallii var. nuttallii H. L. Mason 1929-3-2 5033 Monterey twenty mi s Carmel (Big Sur Road); s of Carmel Comment
  UC635306  Astragalus oxyphysus H. L. Mason 1930-3-30 5541 San Benito fourteen mi below Pinnacles (San Benito River Canyon); , below Pinnacles Comment
  UC635311  Astragalus pomonensis H. L. Mason 1926-4-30 3114 Riverside one mi s Temecula (Temecula Canyon); s of Temecula, Temecula Canyon Comment
  UC673343  Athysanus pusillus H. L. Mason 1929-4-29 5237 Lake 2.9 mi w of Lakeport Comment
  UC1039641  Atrichoseris platyphylla Herbert L. Mason 1935-4-30 8290 San Bernardino Poison Canyon Comment
  UC1076494  Atriplex lentiformis subsp. lentiformis Herbert L. Mason 1927-11-27 4143 Santa Barbara Carpenteria Carpenteria (along ocean bluffs) Comment
  UC1191370  Atriplex rosea Herbert L. Mason 1947-8-9 13477 Modoc e side Fairchild Swamp (n of Alturas); e side Fairchild Swamp, n of Alturas Comment
  UCD97819  Atriplex serenana Herbert L. Mason 1927-11-27 4149 Santa Barbara Carpenteria. Comment
  UCD97820  Atriplex serenana Herbert L. Mason; S. Galen Smith 1948-7-29 8232 Merced North Mercy Springs Road, about 4 miles north of Los Banos. Comment
  UC1192164  Baccharis glutinosa Herbert L. Mason 1945-8-16 12656 Solano near Suisan Bay; Grizzly Island Comment
  CAS-BOT-BC106767  Baccharis salicifolia H. L. Mason 1921-5-7 s.n. Monterey Rancho del Monte, Carmel River Comment
  UC912518  Balsamorhiza deltoidea Herbert L. Mason 1932-4-25 7019 El Dorado on road between Coloma and Auburn Coloma; Pilot Hill Comment
  UC912516  Balsamorhiza lanata Herbert L. Mason 1929-5-18 5330 Siskiyou Yreka Comment
  CAS-BOT-BC145819  Beckmannia syzigachne Herbert L. Mason 1948-9-4 13669 b Mono Mono Lake. Rush Creek. Comment
  SACT000425  Beckmannia syzigachne Herbert Mason 1953-7-7 Sierra Sierra Valley; Common. Comment
  POM312314  Bergia texana H. L. Mason 1945-8-24 12681 Lake East shore, Lower Lake. Comment
  CAS-BOT-BC102117  Bidens cernua Herbert L. Mason 1939-7-11 12123 Tuolumne Swamp Lake, just west of Hetch Hetchy Dam, Yosemite National Park 1584 Comment
  POM312323  Bidens cernua H. L. Mason, Verne Grant 1947-7-12 13431 Modoc South loop of west side road, north of Likely Comment
  CAS-BOT-BC15147  Bidens cernua var. cernua Herbert Louis Mason; Verne Grant 1947-7-12 13431 Modoc South loop of west side road, north of Likely 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
  UC1192178  Bidens frondosa Herbert L. Mason and S. Galen Smith 1948-8-12 8333 Merced 5 mi e of Gustine (San Joaquin Valley); San Joaquin Valley Comment
  UC632844  Bidens tripartita H. L. Mason 1936-7-15 11251 Tuolumne 1/2 mi w of Mather 1371 Comment
  GH414797  Blennosperma nanum H. L. Mason 1936-4-10 11052 Unknown Fields south of Angel's Camp Comment
  UC632823  Blennosperma nanum var. nanum H. L. Mason 1936-3-14 10968 Calaveras 3 mi w of San Andreas Comment
  UC1081570  Boechera breweri subsp. breweri Herbert L. Mason 1936-4-26 11092 Lake e side Bartlett Mountain Comment
  GH378801  Boechera depauperata H. L. Mason 1936-7-29 11426 Unknown Terminal moraine of Conness Glacier, Sierra Nevada 3505 Comment
  UC642614  Boechera depauperata H. L. Mason 1936-7-23 11297 Tuolumne Mount Conness Sierra Nevada Comment
  UC559957  Boechera howellii H. L. Mason 1936-7-29 11427 Mono Conness Glacier Sierra Nevada 3505 Comment
  UC559953  Boechera lemmonii H. L. Mason 1936-7-30 11445 Tuolumne Shepherd's Crest Sierra Nevada, Mount Conness Range 3535 Comment
  POM257255  Boisduvalia densiflora var. densiflora H. L. Mason 1925-7-16 2163 Tuolumne Hog Ranch Comment
  POM310936  Boisduvalia densiflora var. densiflora H. L. Mason 1952-7-17 14380 Plumas Sierra Nevada: Along Western Pacific tracks just south of Beckwourth, Sierra Valley. 1524 Comment
  POM312611  Boisduvalia densiflora var. densiflora H. L. Mason 1947-8-11 13495 Lassen Hwy 81, west margin of Lower Lake, north boundary of Lassen County with Modoc County Comment
  UC570902  Bolandra californica H. L. Mason July, 1930 5708 Calaveras near Hermit Springs; Sierra Nevada Mountains, Blue Creek Comment
  CAS-BOT-BC47552  Bolandra californica H. L. Mason 1930-7-1 5708 Calaveras Blue Creek, near Hermit Springs, Sierra Nevada Mountains. Comment
  CAS-BOT-BC28181  Bolboschoenus fluviatilis Herbert L. Mason 1945-9-18 12710 Sutter Sutter By-pass, N of Knight's Landing. Comment
  CAS-BOT-BC28219  Bolboschoenus fluviatilis Herbert L. Mason 1946-7-27 12954 Lake Upper Lake - Lakeport Road. Comment
  UC1100844  Bolboschoenus fluviatilis Herbert L. Mason, Verne Grant 1946-8-14 13017 Butte canal near big pond on Sacramento Outing Club (Butte Sink); , on Sacramento Outing Club Comment
  UCD140008  Bolboschoenus glaucus Herbert L. Mason; Verne Grant 1946-8-7 12991 Butte Gridley Road north of Butte Sink. Comment
  CAS-BOT-BC31373  Bolboschoenus maritimus Herbert L. Mason 1945-9-19 12731 Butte Gray Lodge Game Refuge, NW of Pennington. Comment
  UC1100916  Bolboschoenus maritimus Herbert L. Mason, Verne Grant 1947-7-8 13277 Lake Bear Creek near junction of Williams Highway and Upper Lake Highway; Bear Creek Comment
  UCD140033  Bolboschoenus maritimus subsp. paludosus H. L. Mason 1945-9-18 12711 Sutter Pennington Road between Live Oak and Pennington. Comment
  CAS-BOT-BC31400  Bolboschoenus robustus Herbert L. Mason 1945-8-16 12660 a Solano Grizzly Island, near Suisun Bay. Comment
  UC1077118  Botrychium multifidum Herbert L. Mason 1926-5-30 3311 El Dorado Eagle Creek Lake Tahoe drainage Comment
  UC912692  Botrychium simplex Herbert L. Mason 1936-7-27 11370 Tuolumne Gaylor Lakes Yosemite National Park 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
  UC635681  Brandegea bigelovii H. L. Mason 1928-3-10 4213 Riverside Coachella Mountains, Hidden Springs Canyon Hidden Springs Canyon; Coachella Mountains, Hidden Springs Canyon Comment
  CAS-BOT-BC106210  Brickellia californica H. L. Mason 1927-9-23 4083 Santa Barbara Canyon back of Prisoners Harbor - Santa Cruz Island Comment
  JEPS18575  Brickellia californica Herbert L. Mason 1957-9-23 4083 Santa Barbara Prisoners Harbor, Santa Cruz Island. Comment
  UC571018  Brickellia californica H. L. Mason 1928-10-3 4988 Monterey 10 mi above Carmel Mission (Carmel River); Carmel River Comment
  UC571016  Brickellia californica H. L. Mason 1923-6-19 521 Ventura Ojai Comment
  UC769983  Briza minor Herbert L. Mason 1934-3-25 7931 Sacramento Keithley Ranch Sacramento Valley, Rio Linda Comment
  UC912578  Briza minor H. L. Mason 1926-5-28 3262 El Dorado Rose Springs Comment
  SEINET4183112 Image available Briza minor Herbert L. Mason 1934-3-25 7931 Sacramento Keithly ranch, Rio Landa, Sacramento County. Comment
  UC634760  Brodiaea nana Herbert L. Mason 1928-5-3 4452 San Joaquin 4 mi N of Clements, vernal pools 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
  RSA23338  Bulbostylis capillaris H. L. Mason 1938-7-13 11946 Mariposa Yosemite National Park; Base of El Capitan, Yosemite Valley 1227 Comment
  UC632753  Bulbostylis capillaris H. L. Mason 1938-7-6 11858 Tuolumne between Swamp Lake and Miguel Meadow; Yosemite National Park 1645 Comment
  SEINET10587210  Bulbostylis capillaris Herbert L. Mason 1938-7-13 Mason 11946 Mariposa Yosemite Valley, Mariposa County. 1227 Comment
  UC555386  Caesalpinia virgata H. L. Mason 1928-3-10 Riverside Coachella Mts., Hidden Springs Canyon Comment
  UCD57714  Calamagrostis purpurascens H. L. Mason 1936-7-23 11303 Tuolumne Yosemite National Park, slopes of Mt. Conness. Comment
  UC570771  Callitriche H. L. Mason 1932-3-1 6804 Marin w side Olema (to Bolinas Road) Comment
  UC570779  Callitriche heterophylla H. L. Mason Apr 1930 5549 Stanislaus 2 mi s Knight's Ferry (8 mi e of Oakdale) Comment
  UC570757  Callitriche heterophylla var. bolanderi H. L. Mason 1929-4-7 5170 Stanislaus 6 mi w Oakdale Comment
  UC570775  Callitriche longipedunculata H. L. Mason Apr 1930 5545 Calaveras 2 miles east of Valley Springs Comment
  UC1101518  Callitriche verna Herbert L. Mason and Verne Grant 1947-7-11 13366 Modoc s of Alturas (by Jones' Lane, off Highway 395) Comment
  UC672155  Calochortus amabilis Herbert L. Mason Jun 1930 5681 Lake St. Helena Creek Mount St. Helena Comment
  UC1076028  Calochortus coeruleus Herbert L. Mason 1947-5-17 14765 Siskiyou 5 mi s Callahan (on Scott Mountain Road) Comment
  UC672148  Calochortus monophyllus Herbert L. Mason 1927-5-11 3725 Yuba near Dobbins 457 Comment
  UC672146  Calochortus nudus Herbert L. Mason 1926-5-29 3297 Nevada 3 mi w Cisco 1767 Comment
  UC1187346  Calochortus splendens Herbert L. Mason 1961-5-21 15075 Colusa Mouth of Bear Valley 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
  RSA92271  Calycadenia multiglandulosa subsp. bicolor H. 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
  UC1076273  Calycadenia villosa Herbert L. Mason 1930-10-25 5784 Monterey Foothills of Santa Lucia Mountains, between Jolon and Santa Lucia Ranger Station along San Antonio River San Antonio River, Santa Lucia Mountains 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
  SEINET184160  Calyptridium quadripetalum H. L. Mason 1936-4-26 11097 a Lake Bartlett Springs 16 mi NE of Clear Lk 792 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
  UC642676  Calyptridium umbellatum H. L. Mason 1936-7-23 11309 Tuolumne Mount Conness; Sierra Nevada, Mount Conness Comment
  UC912376  Calystegia malacophylla subsp. malacophylla H. L. Mason 1925-7-4 2144 Tuolumne Mather Sierra Nevada Mountains, Yosemite National Park, Mather (Yosemite National Park, Sierra Nevada Mountains) Comment
  UC635022  Calystegia purpurata H. L. Mason 1924-11-16 1154 Marin Willow Camp , Willow Camp (Mount Tamalpais) 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
  RSA257272  Camissonia bistorta H. L. Mason 1926-5-1 3186 San Diego [Unspecified] Comment
  UCD103379  Camissonia campestris Steve Mason; Joey Artero 1993-4-24 10 San Luis Obispo San Luis Obispo County: Carrizo Plain Natural Area, Soda Lake Road, 7 miles SE of Washburn Ranch Road. About 200' in from NE side of road. 640 Comment
  UC635287  Camissonia campestris subsp. campestris H. L. Mason 1929-3-31 5153 Contra Costa Antioch San Joaquin River (sand dike along river) Comment
  UC635394  Camissonia strigulosa H. L. Mason 1926-4-18 2861 San Francisco hills near sand dunes; San Francisco Comment
  CAS-BOT-BC160890  Camissonia tanacetifolia subsp. tanacetifolia H. L. Mason 1924-6-15 1037 Plumas Graeagle Comment
  POM257257  Camissonia tanacetifolia subsp. tanacetifolia H. L. Mason 1924-6-15 1037 Plumas Graeagle - near Blairsden. Comment
  POM312605  Camissonia tanacetifolia subsp. tanacetifolia H. L. Mason, Verne Grant 1947-7-10 13327 Modoc Dorris Reservoir, 2 miles east of Alturas. Comment
  UC635398  Camissoniopsis cheiranthifolia subsp. cheiranthifolia Herbert L. Mason 1927-10-4 4118 Santa Cruz mouth of Waddell Creek Ano Nuevo Pt. Comment
  SEINET10463902  Campanula californica Mason 1932-7-24 Mason 7116 Marin MARSH ON INVERNESS RIDGE Comment
  SEINET10905986  Campanula californica Mason 1946-7-4 Mason 12894 Sonoma Pitkin Marsh, between Santa Rosa and Forestville Comment
  CAS-BOT-BC266444  Campanula exigua H. L. Mason 1935-5-9 8310 Stanislaus Slopes of Red Mountains, Arroyo del Puerto, Mount Hamilton Range Comment
  SEINET3557292 Image available Campanula exigua Herbert L. Mason 1940-5-5 12281 San Benito Panoche Pass, about 20 miles SE of Paicines Comment
  UC635638  Campanula prenanthoides H. L. Mason 1925-8-11 2218 Tuolumne Big Oak Flat Road to Tuolumne Grove Comment
  SEINET10463489  Campanula scouleri Mason 1950-7-15 Mason 14059 Trinity SUMMIT OF GRADE, SCOTT MTN. HILLSLOPES Comment
  CAS-BOT-BC76292  Canbya candida Herbert L. Mason 1935-4-30 10006 Kern Walker Pass. Comment
  SEINET10904746  Canbya candida Mason 1935-4-30 Mason 10006 Kern Walker pass, southern sierra nevada. Comment
  UC1056982  Cardamine oligosperma H. L. Mason 1927-4-23 3695 San Mateo Pescadero Creek near Bloomquist Mill; Pescadero Creek near Bloomquist Mill Comment
  UC1076257  Cardionema ramosissimum Herbert L. Mason 1932-4-28 7035 Monterey Pajaro Hills e. of Watsonville; Pajaro Hills Comment
  CAS-BOT-BC245194  Carex atherodes Herbert Louis Mason; Verne Grant 1947-7-12 13424 Modoc Near S end of west side road, along railroad tracks, Pit River Valley, S of Alturas. Comment
  UC1100439  Carex atherodes Herbert L. Mason, Verne Grant 1947-7-11 13376 Modoc s Alturas (irrigation ditch near west side road); South Fork of Pit River Comment
  UC1056295  Carex buxbaumii Herbert L. Mason 1939-7-11 12115 Tuolumne marsh 1/2 mi below Swamp Lake; Yosemite National Park 1554 Comment
  UC1102955  Carex buxbaumii Herbert L. Mason 1958-8-9 14897 Tuolumne w side of Hetch Hetchy Dam (meadow at Swamp Lake); Sierra Nevada, Yosemite National Park, Swamp Lake 1584 Comment
  UC599133  Carex buxbaumii H. L. Mason 1938-7-9 11890 Tuolumne w Hetch Hetchy; Yosemite National Park, Swamp Lake 1584 Comment
  UC599137  Carex buxbaumii H. L. Mason 1938-7-9 11901 Tuolumne w Hetch Hetchy; Yosemite National Park, Swamp Lake 1584 Comment
  YM-YOSE65387  Carex buxbaumii H. L. Mason 1938-7-9 11890 Tuolumne SWAMP LAKE RESEARCH RESERVE. SOUTH ISLAND 1584 Comment
  YM-YOSE65399  Carex congdonii H. L. Mason 1938-7-28 12046 Tuolumne MACOMB RIDGE EAST OF TILDEN LAKE 3048 Comment
  CAS-BOT-BC20576  Carex disperma Herbert L. Mason 1952-8-16 14469 Nevada Sierra Nevada. Sage Hen Creek. Meadow opposite University of California Trout Laboratory. 1981 Comment
  SEINET13351343  Carex disperma H. L. Mason 1952-8-16 14469 Nevada Sierra Nevada, Sage Hen Creek, meadow opposite University of California Trout Laboratory 1981 Comment
  CAS-BOT-BC9342  Carex feta Herbert L. Mason 1958-8-9 14854 Tuolumne Sierra Nevada, Yosemite National Park. Swamp Lake, west of Hetch Hetchy Dam 1584 Comment
  UC1056298  Carex feta Herbert L. Mason 1939-7-11 12116 Tuolumne marsh 1/2 mi below Swamp Lake Comment
  UC1102952  Carex feta Herbert L. Mason 1958-8-9 14854 Tuolumne W of Hetch Hetchy Dam (Swamp Lake); Sierra Nevada, Yosemite National Park 1584 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
  UC714313  Carex helleri H. L. Mason 1936-7-23 11270 Tuolumne e 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
  UC965617  Carex integra Herbert L. Mason 1952-7-19 14437 Nevada meadow opposite University of California Trout Laboratory; Sierra Nevada, Sage Hen Creek 1981 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
  UC599142  Carex lenticularis var. lipocarpa H. L. Mason 1938-7-10 11919 Tuolumne w Hetch Hetchy; Yosemite National Park, Swamp Lake, South Island 1584 Comment
  UC599123  Carex luzulifolia H. L. Mason 1938-7-28 12041 Tuolumne E of Tilden Lake (Macomb Ridge); Yosemite National Park 3048 Comment
  YM-YOSE65466  Carex luzulifolia H. L. Mason 1938-7-28 12041 Tuolumne MACOMB RIDGE EAST OF TILDEN LAKE 3048 Comment
  UC1100495  Carex nebrascensis Herbert L. Mason, Verne Grant 1947-7-12 13435 Modoc n Likely; Corporation Ranch Headquarters Comment
  YM-YOSE65514  Carex paucicostata H. L. Mason 1938-7-10 11919 Tuolumne SOUTH ISLAND SWAMP LAKE. WEST OF HETCH HETCHY 1584 Comment
  UCD140721  Carex pellita Herbert L. Mason; Verne Grant 1947-7-12 13423 Modoc near south end of west side road, along railroad tracks, Pit River Valley, south of Alturas. Comment
  POM313115  Carex praegracilis H. L. Mason, Verne Grant 1947-7-12 13439 Modoc Corporation Ranch Headquarters, north of Likely. Comment
  UC599127  Carex preslii H. L. Mason 1938-7-28 12043 Tuolumne Macomb Ridge E of Tilden Lake Yosemite National Park 3048 Comment
  YM-YOSE65519  Carex preslii H. L. Mason 1938-7-30 12059 Tuolumne SOUTH END TILTILL MTN. 2590 Comment
  UC965597  Carex subfusca Herbert L. Mason 1952-8-16 14488 Nevada meadow opposite University of California Trout Laboratory; Sierra Nevada, Sage Hen Creek 1981 Comment
  UC1056297  Carex utriculata Herbert L. Mason 1939-7-11 12114 Tuolumne marsh 1/2 mi below Swamp Lake; Yosemite National Park 1554 Comment
  UC965613  Carex utriculata Herbert L. Mason 1952-7-16 14347 Nevada 1 mi w University of California Trout Laboratory (adjacent to stream which arises from large spring in meadow); Sierra Nevada, Sage Hen Creek 1981 Comment
  SEINET11054337  Carex utriculata H. L. Mason 1952-7-19 14434 Nevada Sierra Nevada, Sage Hen Creek, meadow opposite University of California Trout Laboratory 1981 Comment
  CAS-BOT-BC115018  Carex vesicaria Herbert L. Mason 1958-8-9 14887 Tuolumne Meadow at Swamp Lake, west of Hetch Hetchy Dam. 1584 Comment
  CAS-BOT-BC59738  Cassiope mertensiana H. L. Mason 1928-7-5 4877 Mono Tioga Mines. Comment
  UC712449  Cassiope mertensiana subsp. californica Herbert L. Mason 1936-7-28 11400 Mono Dana Plateau, vicinity of Mount Dana. 3596 Comment
  UC1039784  Castilleja affinis subsp. affinis H. L. Mason 1926-4-10 2815 Alameda Cedar Mountain Mount Hamilton Range, Arroyo Mocho Canyon (via Arroyo Mocho Canyon) Comment
  UC1275791  Castilleja angustifolia Herbert L. Mason 1963-5-7 15233 Mono e of Mono Lake (Benton summit); Benton Comment
  UC673460  Castilleja attenuata H. L. Mason 1929-3-23 5086 Tulare 3 mi above Springville; Middle Tule River Comment
  UC673441  Castilleja exserta H. L. Mason 1932-3-19 6822 San Joaquin 2 mi e Midway (between Mountain House and Tracy) Comment
  UC673440  Castilleja exserta subsp. exserta H. L. Mason 1929-3-15 5059 Contra Costa about 5 mi from Brentwood (along Marsh Creek Road) Comment
  UC673456  Castilleja exserta subsp. exserta H. L. Mason 1928-3-4 4168 Contra Costa Shell Ridge Comment
  UC632794  Castilleja foliolosa H. L. Mason 1936-3-21 11036 Mariposa 4 mi n Coulterville Comment
  UC673465  Castilleja lacera H. L. Mason 1928-5-4 4507 El Dorado 4 mi n Shingle Spring; Greene Valley Comment
  UC673469  Castilleja lacera H. L. Mason 1931-5-9 5871 Siskiyou 3 mi w Weed Comment
  JEPS3693  Castilleja linariifolia H. L. Mason 1953-7-21 14563 Mono just e Campito Mountain (near road to Naval Physiological Research Station, close to White Mt. Peak); White Mountains 3352 Comment
  UCD122604  Castilleja minor subsp. minor Herbert L. Mason 1948-9-4 13651 Mono Rush Creek, Mono Lake. 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
  UC712178  Castilleja nana Herbert L. Mason 1936-7-31 11454 Mono e of Saddlebag Lake (Tioga Crest); Sierra Nevada, Tioga Crest Comment
  JEPS18947  Castilleja pruinosa Herbert L. Mason 1957-4-28 14689 El Dorado about 5 mi s Georgetown; Garden Valley 579 Comment
  UC632862  Castilleja tenuis H. L. Mason 1936-7-12 11229 Mariposa Peregoy Meadows Yosemite National Park (Glacier Point road) 2255 Comment
  UC592146  Caulanthus H. L. Mason 1930-4-20 5573 Kern between Mohave and Lancaster; between Mohave and Lancaster Comment
  SBBG114013  Caulanthus californicus H. L. Mason 1935-5-2 10001 Kern 1 mi E of Lost Hills Comment
  UC545817  Caulanthus californicus Herbert L. Mason 1935-5-2 10001 Kern one mi e Lost Hills (nw Kern County); e of Lost Hills Comment
  SFV1439  Caulanthus cooperi H. L. Mason 1940-3-22 12233 Inyo Death Valley Grapevine Mountains. Titus Canyon. Comment
  UC1111570  Caulanthus cooperi Herbert L. Mason 1940-3-22 12233 Inyo Titus Canyon Death Valley National Monument, Grapevine Mountains Comment
  UC592142  Caulanthus coulteri H. L. Mason 1929-3-23 5076 Tulare three mi above Springville (Middle Tule River); Middle Tule River Comment
  CAS-BOT-BC41032  Caulanthus flavescens Herbert L. Mason 1935-3-24 10005 Alameda West end of Corral Hollow. Comment
  UC639098  Caulanthus inflatus H. L. Mason 1932-4-2 6896 Kern 3 mi w Muroc (Mohave Desert); , w of Muroc Comment
  UC634562  Ceanothus cordulatus H. L. Mason 1925-8-11 2211 Tuolumne along Big Oak 7 lot rd to Tuolumne Grove Yosemite National Park 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
  UC634566  Ceanothus cuneatus var. cuneatus Herbert L. Mason 1925-6-27 2126 Tuolumne Mather (Hog Ranch) Comment
  UC634568  Ceanothus cuneatus var. cuneatus H. L. Mason March, 1925 Contra Costa Mount Diablo Comment
  UC634573  Ceanothus cuneatus var. cuneatus H. L. Mason 1926-6-6 3381 Santa Cruz Big Basin Comment
  CAS-BOT-BC64053  Ceanothus cuneatus var. rigidus H. L. Mason 1929-3-2 5027 Monterey Big Sur Road, 20 mi. s. of Carmel. Comment
  UC912395  Ceanothus foliosus Herbert L. Mason 1929-4-29 5231 Lake just e of Hopland Mayacama Range Comment
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Jul 28 2015
  UC912378  Ceanothus gloriosus var. exaltatus Herbert L. Mason 1931-3-7 5802 Sonoma Vine Hill School, 12 miles west of Santa Rosa. Comment
  UC634812  Ceanothus griseus H. L. Mason 1929-3-2 5023 Monterey 20 mi s of Carmel Big Sur Rd. Comment
  SEINET11191707  Ceanothus impressus H. Mason 1951-3-31 s.n. Alameda Berkeley. Comment
  UC634809  Ceanothus incanus H. L. Mason 1928-7-14 4901 Humboldt East Fork of Eel River Garberville Comment
  UC635515  Ceanothus incanus H. L. Mason 1926-6-23 561 Monterey Cypress Point Carmel Comment
  UC912381  Ceanothus integerrimus Herbert L. Mason 1931-4-19 5848 Monterey near Santa Lucia Ranger Station Santa Lucia Mts. Comment
  UC635529  Ceanothus jepsonii Herbert L. Mason 1926-3-22 2783 Lake Mt. St. Helena Comment
  UC912390  Ceanothus leucodermis Herbert L. Mason 1931-4-19 5846 Monterey near Santa Lucia Ranger Station; Santa Lucia Mts. Comment
  UC912389  Ceanothus papillosus Herbert L. Mason 1931-4-19 5844 Monterey near Santa Lucia Ranger Station; Santa Lucia Mountains Comment
  GH425119  Ceanothus prostratus H. L. Mason 1924-6-16 1046 Unknown Graeagle Comment
  CAS-BOT-BC52172  Ceanothus pumilus Herbert L. Mason 1947-5-17 14760 Siskiyou Five miles south of Callahan, on Scott Mountain road Comment
  UC1076021  Ceanothus pumilus Herbert L. Mason 1947-5-17 14760 Siskiyou on Scott Mountain road five mi s Callahan; s of Callahan Comment
  UC634797  Ceanothus spinosus Herbert L. Mason 1923-6-16 442 Santa Barbara La Cumbre Peak Santa Barbara, La Cumbre Peak Comment
  UC634800  Ceanothus spinosus Herbert L. Mason 1923-6-15 418 Santa Barbara Gaviota Pass Comment
  CAS-BOT-BC52267  Ceanothus thyrsiflorus Herbert L. Mason 1934-4-1 s.n. San Luis Obispo Twenty miles North 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
  RSA131005  Centaurea calcitrapa H. L. Mason 1921-10 s.n. San Mateo County Hospital, Belmont. Crystal Springs Road Comment
  UC1191678  Centaurium exaltatum Herbert L. Mason 1947-8-15 13553 Modoc e side Goose Lake (on Willow Ranch); Mouth of Crane Creek Comment
  UC1178020  Centaurium muehlenbergii Herbert L. Mason 1955-7-14 14637 Contra Costa 0.5 mi e Antioch Bridge Comment
  UC566944  Centaurium muehlenbergii H. L. Mason 1928-7-14 4903 Humboldt near Garberville; East Fork of Eel River Comment
  UC566917  Centaurium venustum H. L. Mason 1923-7-21 638 Tuolumne Hetch Hetchy Sierra Nevada Mountains, Yosemite National Park Comment
  UC1093927  Centromadia fitchii Herbert L. Mason 1929-9-21 5430 Contra Costa 3 mi above Clayton (Marsh Creek Road) Comment
  UC1056987  Centunculus minimus Herbert L. Mason Oct 23 1937-Oct 24 1937 11696 a Mendocino vicinity of Fort Bragg Comment
  UC673563  Cephalanthera austiniae H. L. Mason July, 1930 5700 Calaveras near Hermit Springs (Blue Creek (tributary of N. Fork Mokelumne R.)); Blue Creek (tributary of N. Fork Mokelumne R.) Comment
  CAS-BOT-BC400159  Ceratophyllum demersum H. L. Mason 1929-9-9 5421 San Joaquin Holt Comment
  UC1028679  Ceratophyllum demersum Herbert L. Mason 1938-8-26 12076 San Joaquin Trappers Slough Roberts Island (Roberts Island); , Roberts Island Comment
  UC635510  Ceratophyllum demersum H. L. Mason 1928-9-30 4955 San Joaquin San Joaquin Delta near Holt; San Joaquin Delta Comment
  UC635511  Ceratophyllum demersum H. L. Mason 1929-9-9 5421 San Joaquin Holt Comment
  UC555392  Cercis occidentalis H. L. Mason 1928-5-4 4498 El Dorado Dugars Comment
  UC1081534  Chaenactis glabriuscula var. glabriuscula Herbert L. Mason 1936-3-21 11027 Mariposa 3 m n of Coulterville 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
  UC565572  Chaenactis stevioides H. L. Mason 1926-4-27 3051 San Bernardino 30 mi w of Victorville; Mojave Desert Comment
  UC555297  Chamaebatia foliolosa H. L. Mason 1926-5-29 3291 Nevada 2 mi w of Emigrant Gap Comment
  UC1192293  Chamaesyce maculata Herbert L. Mason 1945-9-19 12728 Sutter e side Butte Creek (West Butte Rd) Comment
  UC635594  Chamaesyce polycarpa H. L. Mason 1925-4-18 1495 San Diego hills near San Diego (Navy fuel dock) Comment
  UC570792  Chamaesyce serpillifolia subsp. hirtula H. L. Mason 1930-10-25 5789 Monterey between Jolon and Santa Lucia Rnger Staion (along the San Antonio River); foothills of the Santa Lucia Mtns Comment
  UC570786  Chamaesyce serpyllifolia H. L. Mason 1929-10-4 5456 Placer 4 mi below Colfax Comment
  UC672640  Cheilanthes clevelandii Herbert L. Mason 1926-5-1 3168 San Diego Palomar Mt Comment
  UC1191185  Cheilanthes gracillima Herbert L. Mason Tuolumne Jack Main Canyon; Sierra Nevada, Yosemite Nat'l Park 2286 Comment
  UC1191334  Chenopodium album Herbert L. Mason and Verne Grant 1947-7-12 13420 Modoc s Alturas (irrigation ditch near s end of w side road, along railroad tracks); Pit River Valley Comment
  POM312492  Chenopodium album H. L. Mason, Verne Grant 1946-8-7 12978 Colusa 8 miles north of Colusa; Butte Sink. Comment
  SEINET5764323 Image available Chenopodium californicum Herbert L. Mason 1926-1 2813 Alameda Cedar Mountain Comment
  UC1191342  Chenopodium glaucum Herbert L. Mason 1948-9-4 13645 Mono Rush Creek Mono Lake Comment
  UCD98199  Chenopodium glaucum var. salinum Herbert L. Mason 1948-9-4 13645 Mono Rush Creek, Mono Lake. Comment
  POM312491  Chenopodium hians H. L. Mason, Verne Grant 1947-7-10 13345 Modoc Dorris Reservoir, 2 miles east of Alturas. 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
  UC1191348  Chenopodium pumilio Herbert L. Mason and S. Galen Smith 1948-7-29 8250 Merced salt slough at end Turner Island Road (e of Las Banos) Comment
  SACT000740  Chloris gayana Herbert Mason, S. Smith 1948-7-27 Merced Border of wet field, strongly rooting at precumbent nodes, rhizomes. West of salt slough, north of Los Banos on Delta road. Comment
  CAS-BOT-BC246154  Chloropyron molle subsp. hispidum Herbert L. Mason 1948-6-29 13583 Merced 5 miles north of Volta Comment
  CAS-BOT-BC191151  Chorizanthe diffusa H. L. Mason 1923-6-15 397 Santa Barbara Harris Grade, on La Purisima Ridge, between Harris and Lompoc Comment
  CAS-BOT-BC191220  Chorizanthe douglasii H. L. Mason 1923-6-23 542 Monterey Carmel River, ten miles above Carmel Comment
  JEPS19625  Chorizanthe obovata Herbert L. Mason 1946-6-7 12822 Santa Barbara 0.5 mi w Camuesa (Mono Flat); Mono Flat Comment
  SD47975  Chorizanthe obovata Herbert L Mason 1946-6-7 12822 Santa Barbara Mono Flat, 0.5 mile west of Camuesa Comment
  CAS-BOT-BC252703  Chorizanthe obovata Herbert L. Mason 1923-6-22 532 San Luis Obispo Camp Fremont, just above San Luis Obispo Comment
  UC912602  Chorizanthe polygonoides var. polygonoides Herbert L. Mason 1934-5-5 8130 Lake between Kelseyville and Lower Lake; between Kelseyville and Lower Lake Comment
  UC1076087  Chrysolepis chrysophylla var. minor Herbert L. Mason 1925-10-4 2240 Marin n side Mt. Tamalpais Comment
  UC1083183  Chrysolepis sempervirens Herbert L. Mason 1929-10-4 5474 El Dorado above Glen Alpine; Fallen Leaf Lake Comment
  UC635283  Chylismia claviformis subsp. claviformis H. L. Mason 1926-4-27 3038 Los Angeles Rock Creek Comment
  UC673483  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
  POM257276  Circaea alpina subsp. pacifica H. L. Mason 1925-7-30 2191 Tuolumne Smith Peak Trail from Mather Comment
  CAS-BOT-BC285478  Cirsium occidentale var. californicum Herbert L. Mason 1946-6-7 12831 Santa Barbara Between Camuesa Creek and Oso Creek, south of Little Pine Mountain 762 Comment
  UC912242  Cirsium occidentale var. californicum Herbert L. Mason 1925-6-24 2103 Tuolumne Mather Comment
  UC775189  Cirsium occidentale var. venustum Herbert L. Mason 1940-5-4 12272 Merced nw of Ortigalita Peak; Inner South Coast Ranges, Piedra Azul Creek 304 Comment
  SEINET7836837 Image available Cirsium scariosum H. L. Mason 1952-7-11 14334 Nevada Sage Hen Creek, one mile west of University of California Trout Laboratory 1981 Comment
  UC912469  Cirsium scariosum var. americanum Herbert L. Mason 1924-6-18 1048 Plumas bog n of Greneagle Comment
  CAS-BOT-BC162550  Clarkia affinis H. L. Mason 1932-4-17 6947 Santa Clara Uvas-Almaden Road Comment
  UC634707  Clarkia affinis H. L. Mason 1932-4-17 6947 Santa Clara Uvas-Almaden Road Comment
  UC634660  Clarkia concinna subsp. concinna H. L. Mason 1930-6-1 5621 Mendocino Cloverdale to Fort Bragg; Navarro River Comment
  UC1178878  Clarkia davyi Herbert L. Mason 1940-5-22 12306 Mendocino headland n Pudding Creek Slough (near Fort Bragg) Comment
  CAS-BOT-BC164562  Clarkia purpurea subsp. viminea H. L. Mason 1921-7-3 s.n. San Mateo Pescadero - La Honda Road Comment
  UC634703  Clarkia rubicunda H. L. Mason 1926-5-26 3247 Alameda Niles Canyon Comment
  CAS-BOT-BC165545  Clarkia unguiculata H. L. Mason 1921-5-7 s.n. Monterey Rancho del Monte, Carmel River Comment
  UC634656  Clarkia unguiculata H. L. Mason 1926-5-26 3250 Alameda near Sunol; Niles Canyon 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
  UC634940  Claytonia exigua subsp. exigua H. L. Mason 1925-3-10 1296 Contra Costa higher slopes Mt. Diablo Comment
  UC635331  Claytonia nevadensis H. L. Mason 1923-9-15 786 Tuolumne Tioga mines; Sierra Nevada Mountains, Yosemite National Park Comment
  SEINET199763  Claytonia rubra subsp. rubra H. L. Mason 1926-3-26 11097 Lake 1.5 mi E of Bartlett Springs Comment
  CAS-BOT-BC91427  Clematis lasiantha H. L. Mason 1926-5-8 s.n. Monterey Rancho del Monte Carmel River. Hillside, opposite schoolhouse. Comment
  UC635539  Clematis lasiantha H. L. Mason 1931-4-19 5845 Monterey near Santa Lucia Range Station; Santa Lucia Mts. Comment
  UC571104  Cneoridium dumosum Herbert L. Mason 1925-4-18 1497 San Diego San Diego; hills back of Navy Fuel Work Comment
  UC1178875  Collinsia callosa Herbert L. Mason 1935-4-30 8350 Kern Walker Pass Comment
  UC1178860  Collinsia corymbosa Herbert L. Mason 1940-5-22 12299 Mendocino near Fort Bragg (headland n of Pudding Creek Slough) Comment
  UC1178872  Collinsia heterophylla Herbert L. Mason 1940-5-20 12288 Marin outcrop back of Tiburon Comment
  UC672479  Collinsia heterophylla H. L. Mason 1928-5-4 4527 El Dorado Hastings Creek near Pilot HIll; Hastings Creek Comment
  UC672475  Collinsia parviflora H. L. Mason 1926-4-11 2851 Alameda Cedar Mountain and Rancho Repose Mount Hamilton Range, Arroyo Mocho (Arroyo Mocho) Comment
  UC672470  Collinsia sparsiflora var. collina Herbert L. Mason 1929-3-15 5051 Contra Costa Nortonville Comment
  UC672482  Collinsia tinctoria H. L. Mason 1923-7-26 652 Tuolumne Mather, Hog Ranch Hog Ranch; Mather, Hog Ranch Comment
  CAS-BOT-BC229527  Collomia diversifolia Herbert L. Mason 1938-5-1 11741 Lake 3 miles E of Middletown Comment
  POM310951  Collomia diversifolia H. L. Mason 1938-5-1 11741 Lake 3 miles east of Middletown Comment
  UC1191142  Collomia diversifolia Herbert L. Mason 1953-6-8 14522 Lake Black Oak Villa Butts Canyon Comment
  UC908723  Collomia heterophylla Herbert L. Mason 1926-5-29 3278 Nevada 5 mi s Grass Valley; Rattlesnake Creek 609 Comment
  UC907910  Collomia linearis Herbert L. Mason 1925-8-11 2222 a Tuolumne Morraine Flat Tuolumne Meadows 2743 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
  UC1083154  Conicosia pugioniformis H. L. Mason 1924-10-19 1121 San Francisco Merced Lake. Comment
  JEPS21905  Cordylanthus mollis subsp. hispidus Herbert L. Mason 1948-6-29 13583 Merced 5 mi n Volta (margin of stream) Comment
  UC1191858  Cordylanthus mollis subsp. hispidus Herbert L. Mason and Malcolm A. Nobs 1948-10-2 697 Merced Santa Fe grade 6 mi s Los Banos; Alkaline Grasslands of the San Joaquin Valley 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
  UC1060661  Coreopsis douglasii Herbert L. Mason 1957-5-11 14733 San Benito 2-3 mi e of Hernandez Comment
  POM289573  Coreopsis stillmanii H. L. Mason 1936-3-21 11019 Tuolumne 4 miles north of Coulterville Comment
  JEPS22796  Corethrogyne filaginifolia Herbert L. Mason 1929-9-1 5417 Mendocino 3 mi n Fort Bragg Comment
  UC672323  Corethrogyne filaginifolia H. L. Mason 1929-10-12 5481 San Luis Obispo Atascadero Creek Comment
  UC912336  Corethrogyne filaginifolia Herbert L. Mason 1929-3-2 5032 Monterey 20 mi s Carmel (Big Sur Road); Big Sur Road Comment
  CAS-BOT-BC209811  Cornus glabrata H. L. Mason 1929-10-12 5486 San Luis Obispo Along Atascadero Creek, 4.3 miles west of Atascadero 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
  RSA13585  Cornus sessilis H. L. Mason 1935-3-14 10984 Calaveras South fork of the Mokelumne River, about three miles northeast of Glencoe. Comment
  YM-YOSE63762  Crepis acuminata Harry L. Mason 1938-7-7 11873 Tuolumne SWAMP LAKE RESEARCH RESERVE Comment
  UC602783  Crepis nana H. L. Mason 1936-7-30 11451 Mono Excelsior Peak Comment
  UC635026  Cressa truxillensis H. L. Mason 1928-9-2 4943 Alameda Bay Farm Island Comment
  UC632866  Crocanthemum scoparium var. scoparium H. L. Mason 1938-5-7 11775 Santa Barbara Burton Mesa Comment
  UC634895  Crocanthemum scoparium var. vulgare Herbert L. Mason 1925-4-12 1335 Marin Pipe line trail Mt. Tamalpais Comment
  UC634907  Crocanthemum scoparium var. vulgare Herbert L. Mason 1923-6-15 405 a Santa Barbara Lapurisma Ridge Harris Grade Comment
  CAS-BOT-BC299710  Crocidium H. L. Mason 1929-4-29 5443 Lake About three miles west of Lakeport on Hopland Road Comment
  CAS-BOT-BC190083  Crypsis schoenoides Herbert L. Mason 1945-7-11 12642 Colusa Near Butte Creek. Butte Lodge Outing Club, three miles above Colusa. Comment
  CAS-BOT-BC190086  Crypsis schoenoides Herbert L. Mason 1945-7-11 12642 Colusa Near Butte Creek. Butte Lodgd Outing Club, three miles above Colusa. Comment
  POM313218  Crypsis schoenoides H. L. Mason 1945-9-19 12729 Butte Gray Lodge Game Refuge, northwest of Pennington Comment
  UCD59935  Crypsis schoenoides H. L. Mason 1945-7-11 12642 Sutter Northeast of Colusa, along Butte Creek. Comment
  UC1100189  Crypsis vaginiflora Herbert L. Mason 1945-9-19 12718 Colusa below causeway over Butte Sink spillway (e bank of river, 1 mi above Colusa); Sacramento River, Butte Sink Comment
  UC573088  Cryptantha flaccida H. L. Mason 1928-6-28 4861 Mariposa Wawona Comment
  UC573096  Cryptantha flaccida H. L. Mason 1926-4-11 2853 Alameda Cedar Mountains and Rancho Repose Mount Hamilton Range Comment
  UC573134  Cryptantha micrantha Herbert L. Mason 1932-4-1 6867 Los Angeles 1 mi e Lancaster; Mojave Desert Comment
  UC573070  Cryptantha pterocarya H. L. Mason 1932-4-1 6866 Los Angeles 1 mi e Lancaster; Mojave Desert Comment
  UC573128  Cryptantha virginensis H. L. Mason 1934-3-28 8027 Inyo Near summit of Panamint Range, Townsend (Towne's ?) Pass. Comment
  UC1201231  Cupressus arizonica subsp. nevadensis Herbert L. Mason 1956-3-29 14662 Kern n-facing slopes s Bodfish; Piute Mountains 1066 Comment
  CAS-BOT-BC80663  Cupressus goveniana Herbert Louis Mason 1922-3-28 s.n. Santa Cruz Sandstone cliffs near Bonnie Doon. Comment
  JEPS21188  Cupressus goveniana subsp. pygmaea Herbert L. Mason 1928-8-25 4920 Mendocino 1 mi e of mouth of Noyo River; Noyo Mesa Comment
  UC1076279  Cupressus goveniana subsp. pygmaea Herbert L. Mason 1928-10-21 5009 Mendocino no of Fort Bragg; Pudding Creek Comment
  UC963134  Cupressus goveniana subsp. pygmaea Herbert L. Mason 1946-5-18 12767 Mendocino White Plains, 1 1/2 mi E of Mendocino City Comment
  JEPS21187  Cupressus macnabiana H. L. Mason 1925-1-22 1208 Napa Pope Canyon Comment
  UC1179017  Cupressus macnabiana Herbert L. Mason 1932-7-21 7113 Shasta hills w Redding Comment
Read comments
Oct 13 2006
  NY16756  Cupressus macrocarpa H. L. Mason 1934-10-21 10023 Monterey Point Lobos Comment
  SEINET10834044  Cupressus pygmaea Herbert L. Mason 1934-9-3 Mason 8147 Mendocino White plains three miles east of Mendocino City. Comment
  CAS-BOT-BC85504  Cupressus sargentii Herbert Louis Mason 1926-4-16 s.n. Alameda Type locality: Cedar Mountain. Near the summit growing in volcanic rock Comment
  POM195486  Cupressus sargentii H. L. Mason 1926-4-16 s.n. Alameda Cedar Mountain, near the summit Comment
  UC1083214  Cupressus sargentii Herbert L. Mason 1926-1-2 2606 Napa Toll House Canyon Mt. St. Helena, Toll House Canyon Comment
  UC1077085  Cuscuta californica Herbert L. Mason 1938-7-22 11976 Tuolumne n of Hetch Hetchy (Vernon Lake Trail); Yosemite National Park 2072 Comment
  UC1191660  Cuscuta indecora Herbert L. Mason and Verne Grant 1946-8-6 12974 Colusa 2.7 mi n Colusa (between Sacramento River and Butte Creek); Butte Sink Comment
  UC635241  Cuscuta indecora H. L. Mason Aug 1930 5715 Lake Clear Lake Comment
  UCD126319  Cuscuta indecora var. indecora Herbert L. Mason; Verne Grant 1946-8-6 12974 Colusa 2.7 miles north of Colusa between Sacramento River and Butte Creek. Comment
  POM312612  Cuscuta salina H. L. Mason, Malcom A. Nobs 1948-10-2 706 Fresno Mendota Pool Comment
  UC1191659  Cuscuta subinclusa Herbert L. Mason and Verne Grant 1947-6-26 13247 Solano Cordelia Slough Suisun Marsh Comment
  UC566942  Cycladenia humilis var. venusta Herbert L. Mason 1927-6-15 3782 San Bernardino cirque s. of Baldy; San Gabriel Mts. 2743 Comment
  UC912635  Cynodon dactylon Herbert L. Mason 1926-5-24 3229 Alameda Berkeley, Univ of Calif Campus Comment
  SEINET200026  Cyperus aristatus Herbert L. Mason 1946-7-27 12949 Lake Clear Lake 2-3 miles N of Lakeport. Comment
  UC1100545  Cyperus difformis Herbert L. Mason 1945-9-18 12705 Sutter Sutter By-pass near bridge on Yuba City - Knight's Landing Hwy. Comment
  UC1100547  Cyperus difformis Herbert L. Mason and Verne Grant 1946-8-7 12983 Colusa 8 mi. n. Colusa (Butte Sink); Butte Sink Comment
  POM313105  Cyperus difformis H. L. Mason, S. Galen Smith 1948-8-17 8341 Fresno King s River east of Burrel, San Joaquin Valley Comment
  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
  UC1100528  Cyperus eragrostis Herbert L. Mason and Verne Grant 1946-9-5 13113 Colusa 1.6 mi. w. Williams (rd. to Lake Co.) Comment
  UC1100530  Cyperus eragrostis Herbert L. Mason and Verne Grant 1946-8-28 13083 San Mateo at entrance to county prison San Francisco Comment
  UCD141081  Cyperus eragrostis Herbert L. Mason; S. Galen Smith 1948-8-9 8289 Merced Pacheco Creek, about 10 miles west of summit of Pacheco Pass. Comment
  CAS-BOT-BC114385  Cyperus erythrorhizos Herbert L. Mason 1945-9-19 12724 Colusa Below causway over Butte Sink spillway, E bank of Sacramento River, 1 mi N of Colusa. Comment
  CAS-BOT-BC114386  Cyperus erythrorhizos Herbert L. Mason 1945-9-19 12724 Colusa Below causway over Butte Sink spillway, E bank of Sacramento River, 1 mi N of Colusa. 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
  UC1100639  Cyperus niger Herbert L. Mason and S. Galen Smith 1948-8-19 8382 Merced marsh 1 mi. w. Snelling Comment
  UCD141201  Cyperus niger Herbert L. Mason; Verne Grant 1946-9-27 13141 Butte three miles west of Biggs. Comment
  UCD141202  Cyperus niger Herbert L. Mason; S. Galen Smith 1948-8-12 8331 Merced Gustine Gun Club, 3 miles east of Gustine. Comment
  CAS-BOT-BC113826  Cyperus niger var. capitatus Herbert L. Mason; Stanley Galen [S. Galen] Smith 1948-8-12 8331 Merced Gustine Gun Club, 3 mi E of Gustine. Comment
  UC1100636  Cyperus rotundus Herbert L. Mason and S. Galen Smith 1948-8-18 8349 Kings just w. of Stratford; San Joaquin Valley Comment
  CAS-BOT-BC114107  Cyperus squarrosus Herbert L. Mason 1945-8-24 12686 Lake East Shore, Lower Lake. Comment
  UCSB46427  Cyperus squarrosus Mason, H. 1938-8-1 Tuolumne Tiltill Valley, Yosemite National Park 1676 Comment
  CAS-BOT-BC114173  Cyperus squarrosus H. L. Mason 1938-7-10 11903 Tuolumne Margin of lake at gravel pit, Miguel Meadow, west of Hetch-Hetchy. 1584 Comment
  POM313107  Cyperus squarrosus H. L. Mason, S. Galen Smith 1948-7-29 8247 Merced Salt slough, at end of Turner Island road, east of Los Banos 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
  UCD141108  Cyperus squarrosus Herbert L. Mason; S. Galen Smith 1948-8-19 8377 Merced San Joaquin River, bridge below Snelling. 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
  CAS-BOT-BC435170  Cypselea humifusa Herbert L. Mason 1945-8-24 12684 Lake East shore, Lower Lake Comment
  POM312386  Cypselea humifusa H. L. Mason 1945-8-24 12684 Lake East shore, Lower Lake. Comment
  UCD96982  Cypselea humifusa Herbert L. Mason 1945-8-24 12684 Lake East shore, Lower Lake. Comment
  CAS-BOT-BC70629  Cystopteris fragilis H. L. Mason 1936-7-29 11439 Mono Conness Cirque near Saddlebag Lake, Tioga Pass region, Sierra Nevada Comment
  UC1191181  Cystopteris fragilis Herbert L. Mason 1937-7-24 14065 Tuolumne n of Hetch Hetchy Dam Beehive; Sierra Nevada, Yosemite Nat'l Park 2011 Comment
  UC1100154  Damasonium californicum Herbert L. Mason 1928-4-13 4325 Sonoma near Petaluma Petaluma Comment
  UC1100150  Damasonium californicum Herbert L. Mason 1947-8-12 13514 Modoc s. of Opahwah Butte near Alturas Comment
  UC634824  Darlingtonia californica Herbert L. Mason 1926-4-19 2887 Trinity Comment
  UC1191583  Datisca glomerata Herbert L. Mason, S. Galen Smith 1948-8-9 8282 Santa Clara about 10 mi w of summit of Pacheco Pass (Pacheco Creek); Pacheco Creek Comment
  UC635722  Datisca glomerata H. L. Mason 1932-8-26 7145 Mendocino Navarro River Comment
  UC912273  Deinandra corymbosa Herbert L. Mason 1926-6-15 3393 Alameda campus Berkeley University of California at Berkeley Comment
  UC1191432  Delphinium Herbert L. Mason 1948-7-18 13626 Siskiyou Grass Lake Comment
  UC635353  Delphinium cardinale H. L. Mason 1923-6-18 508 Ventura Red Reef Canyon Topatopa Mountains Comment
  UC635339  Delphinium cardinale H. L. Mason 1927-6-15 3788 Los Angeles wash of the San Gabriel River Comment
  UC912675  Delphinium hansenii H. L. Mason 1923-7-21 632 Tuolumne Hetch Hetchy Sierra Nevada Mountains Comment
  CAS-BOT-BC10257  Delphinium hansenii Herbert L. Mason 1938-7-7 11874 Tuolumne Ridge east of Swamp Lake, between Swamp Lake and Hetch Hetchy 1676 Comment
  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-BC9919  Delphinium nudicaule Herbert L. Mason 1931-3-13 5814 Alameda Lake Chabot Comment
  UC635357  Delphinium nudicaule H. L. Mason 1926-3-14 2723 Napa Mount Saint Helena Comment
  CAS-BOT-BC9967  Delphinium nudicaule Herbert L. Mason 1917-4-28 s.n. Marin Mt. Tamalpias Comment
  UC965556  Delphinium nuttallianum Herbert L. Mason 1952-7-11 14331 Nevada rocky margin of quaking bog at head of meadow 1 mi w University of California Trout Laboratory; Sierra Nevada, Sage Hen Creek 1981 Comment
  CAS-BOT-BC116454  Delphinium patens subsp. patens H. L. Mason 1928-4-29 4440 Contra Costa Sycamore Canyon, south slope of Mount Diablo Comment
  UC1199834  Delphinium polycladon Herbert L. Mason and L. W. Reinecke 1937-7-30 14817 Tuolumne above Mary Lake; Sierra Nevada, Saurian Crest 3048 Comment
  JEPS20987  Dendromecon harfordii Herbert L. Mason 1927-9-25 4105 Santa Barbara along roadway through Buena Vista Canyon Santa Cruz Island Comment
  UC1083123  Dendromecon rigida Herbert L. Mason 1936-4-10 11055 Calaveras ridge between Sheep Ranch and Murphys Comment
  UC634891  Dendromecon rigida H. L. Mason 1926-5-29 3284 a Nevada Donner Pass Road near Alta Comment
  UC635446  Dendromecon rigida Herbert L. Mason 1925-4-12 1339 Marin Pipe line trail Mt. Tamalpais Comment
  UC635451  Dendromecon rigida H. L. Mason 1923-6-15 406 Santa Barbara Harris Grade La Purisma Ridge Comment
  CAS-BOT-BC632  Dendromecon rigida subsp. rigida Herbert L. Mason 1921-7-1 s.n. San Mateo Butano Ridge. Comment
  SEINET3927273  Deschampsia cespitosa Herbert L. Mason 1952-8-16 14491 Nevada Meadow opposite University of California Trout Laboratory.; 0 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
  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
  UC634899  Dicentra formosa Herbert L. Mason 1927-5-11 3734 Yuba near Bullards Bar; Yuba River Canyon 609 Comment
  CAS-BOT-BC612  Dicentra formosa subsp. formosa Herbert L. Mason 1926-2-21 2649 Marin Road from Inverness to Point Reyes Lighthouse. Comment
  CAS-BOT-BC402378  Dicentra formosa subsp. formosa Herbert L. Mason 1927-5-11 3734 Yuba Near Bullards Bar 609 Comment
  UC1111567  Dicentra uniflora Herbert L. Mason 1938-7-28 12024 Tuolumne e of Tilden Lake (Macomb Ridge); Sierra Nevada, Yosemite National Park 3048 Comment
  UC635734  Dichelostemma ida-maia H. L. Mason 1928-7-20 4909 Humboldt South Fork Mountain Comment
  UC634885 Image available Dichondra donelliana H. L. Mason 1927-4-26 5217 Marin open hills on w side Bolinas Ridge; ; W side of Bolinas Ridge, Marin Co. Comment
  UC1100289  Digitaria ischaemum Herbert L. Mason 1945-9-19 12722 a Colusa 1 mi n Colusa (below causeway over Butte Sink spillway, e bank Sacramento River); e bank Sacramento River, Butte Sink spillway Comment
  CAS-BOT-BC209043  Digitaria sanguinalis Herbert L. Mason; S. Galen Smith 1948-7-28 8229 Fresno San Joaquin River at Firebaugh Comment
  SACT000973  Digitaria sanguinalis Herbert Mason, S. Smith 1948-7-28 Fresno Rooting at nodes. Comment
  UC1093882  Dirca occidentalis Herbert L. Mason 1943-5-25 14798 Alameda San Leandro Canyon Comment
  UC635712  Dirca occidentalis H. L. Mason 1925-2-12 1238 Alameda head of San Leandro Canyon Oakland Hills Comment
  UC1039539  Dodecatheon alpinum H. L. Mason 1923-8-6 714 Tuolumne Yosemite National Park , Yosemite National Park (Sierra Nevada Mountains) Comment
  UC1199861  Dodecatheon alpinum H. L. Mason 1923-8-25 354 Mariposa Snow Flat Sierra Nevada Mountains, Yosemite National Park Comment
  UC1199862  Dodecatheon alpinum H. L. Mason 1922-8-26 358 Mono Mono Pass Sierra Nevada Mountains, Yosemite National Park (at Park boundary, Yosemite National Park) Comment
  UC673487  Dodecatheon clevelandii subsp. insulare H. L. Mason 1934-4-1 8058 a San Luis Obispo road from Cambria to Paso Robles; road from Cambria to Paso Robles Comment
  UC1039536  Dodecatheon clevelandii subsp. patulum Herbert L. Mason 1929-3-15 5044 Contra Costa Nortonville Comment
  UC635473  Dodecatheon clevelandii subsp. patulum H. L. Mason 1934-4-4 8058 Contra Costa Marsh Creek Road Comment
  UC635700  Dodecatheon clevelandii subsp. patulum H. L. Mason 1927-3-11 3651 a San Francisco Bernal Heights , Bernal Heights (San Francisco) Comment
  UC673363  Dodecatheon clevelandii subsp. patulum Herbert L. Mason 1925-3-1 1261 San Francisco Bernal Heights San Francisco, Bernal Heights Comment
  POM312860  Dodecatheon hansenii H. L. Mason 1936-3-14 10971 Calaveras On road between San Andreas and Mokelumne Hill. Comment
  JEPS23915  Dodecatheon hendersonii H. L. Mason and H. A. Borthwick 1921-3-20 Santa Clara Guadalupe Canyon Comment
  UC1111024  Dodecatheon hendersonii Herbert L. Mason 1926-3-7 2700 Contra Costa Mt. Diablo Comment
  RSA112452  Dodecatheon hendersonii subsp. cruciatum H. L. Mason 1917-3-8 62 Alameda Kings Mt. Comment
  UC1014776  Dodecatheon jeffreyi H. L. Mason 1923-8-1 685 Tuolumne along trail from Tuolumne Meadows to Elizabeth Lake (Yosemite National Park); Sierra Nevada Mountains, Yosemite National Park Comment
  UC1093942  Dodecatheon jeffreyi Herbert L. Mason 1941-7-7 12503 Madera sphagnum bog just s Givens Lake trail junction (Yosemite National park); Sierra Nevada, Yosemite National Park 2865 Comment
  UC1191693  Dodecatheon jeffreyi Herbert L. Mason 1936-7-7 11151 Mariposa w Dark Hole (Research Reserve, Yosemite National Park); Sierra Nevada, Yosemite National Park, w of Dark Hole 2438 Comment
  UC673497  Dodecatheon jeffreyi H. L. Mason 1922-7-22 318 Tuolumne Aspen Valley Sierra Nevada Mountains, Yosemite National Park Comment
  UC1014773  Dodecatheon jeffreyi H. L. Mason 1922-8-2 338 Tuolumne Lower Lyell Fork Tuolumne River Sierra Nevada Mountains, Yosemite National Park (Tuolumne Meadows, Yosemite National Park) Comment
  UC1039579  Dodecatheon jeffreyi H. L. Mason 1922-8-2 338 Tuolumne Lyell Fork Tuolumne River Sierra Nevada Mountains, Yosemite National Park (Tuolumne Meadows) Comment
  UCD119021  Dodecatheon jeffreyi Herbert L. Mason 1936-7-7 11151 Mariposa Research Reserve, west of Dark Hole. Yosemite National Park, Sierra Nevada. 2438 Comment
  UC673403  Dodecatheon subalpinum Herbert L. Mason 1928-7-3 4867 Mariposa head of Yosemite Creek grade Yosemite Creek drainage, Tioga Road (Tioga Road, Yosemite Creek drainage) Comment
  UC1039533  Dodecatheon subalpinum Herbert L. Mason 1923-7-28 657 Tuolumne Tioga Road between Yosemite Creek bridge and Porcupine Flat; Yosemite National Park, btw Yosemite Crk bridge and Porcupin Comment
  POM311107  Downingia bacigalupii H. L. Mason 1952-7-17 14384 Sierra 1.5 miles E of Calpine at junction of Calpine with Sierraville-Beckwourth road; Sierra Valley; Sierra Nevada. 1524 Comment
  UC965545  Downingia bacigalupii Herbert L. Mason 1952-7-19 14441 Sierra 1.5 mi e Calpine (at junction of Calpine with Sierraville-Beckwourth road); Sierra Nevada, Sierra Valley 1524 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
  JEPS21908  Downingia laeta Herbert L. Mason and Verne Grant 1947-7-11 13369 Modoc s of Alturas (by Jones Lane, off Highway 395) Comment
  UC1189249  Downingia montana Herbert L. Mason 1939-7-13 12140 Tuolumne woods around Miguel Meadows Yosemite National Park Comment
  UC635663  Downingia pulchella H. L. Mason 1932-4-17 6956 Santa Clara sw of Gilroy (Miller and Lux Ranch) Comment
  UC769993  Downingia pusilla Herbert L. Mason 1934-3-25 7935 Sacramento Rio Linda, Keithly ranch Sacramento Valley Comment
  UC1025276  Draba breweri Herbert L. Mason 1936-7-24 11321 Tuolumne White Mountain Sierra Nevada Comment
  CAS-BOT-BC401569  Drosera rotundifolia H. L. Mason 1930-8-1 5738 Mendocino Fort Bragg Comment
  UC634822  Drosera rotundifolia H. L. Mason June 1930 5638 Mendocino Fort Bragg Comment
  UC673314  Drymocallis glandulosa var. wrangelliana Herbert L. Mason 1924-5-13 1006 Alameda Berkeley Hills Comment
  UC965560  Drymocallis lactea Herbert L. Mason 1952-7-16 14372 Nevada one mi w University of California Trout Laboratory; Sierra Nevada, Sage Hen Creek 1981 Comment
  UC571157  Dudleya cymosa subsp. paniculata H. L. Mason 1926-5-26 3251 Alameda Niles Canyon Comment
  CAS-BOT-BC113785  Dulichium arundinaceum Herbert L. Mason 1958-8-9 14848 Tuolumne Swamp Lake, west of Hetch Hetchy Dam 1584 Comment
  RSA28606  Eastwoodia elegans H. L. Mason 1941-7-3 12490 Santa Barbara Head of Cuyama Valley, fourteen miles west of Maricopa 762 Comment
Read comments
Apr 29 2014
  SEINET12218629  Echeveria R. E. Mason 1946-1 s.n. Unknown Oakland Comment
  UC912246  Eclipta prostrata Herbert L. Mason 1928-9-30 4966 San Joaquin near Holt; San Joaquin Delta Comment
  CAS-BOT-BC445825  Egeria densa H. L. Mason 1938-8-26 12075 San Joaquin Trapper Slough, Robert's Island, southwest of Holt Comment
  SEINET12902603 Image available Egeria densa H. L. Mason 1938-1 12075 Unknown Comment
  POM312838  Eichhornia crassipes H. L. Mason, Verne Grant 1946-8-21 13063 San Joaquin West of Stockton on Borden Hwy; Marsh Plant Survey. Comment
  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
  SEINET6626571 Image available Elatine brachysperma Herbert L. Mason 1936-1 12757 Tuolumne 0.5 mile west of Mather, Sierra Nevada Comment
  UCD110449  Elatine californica Herbert L. Mason 1936-9-20 11535 Lake Base of trail; sheep corral to Snow Mountain. Comment
  UCD110450  Elatine chilensis Herbert L. Mason 1933-9-2 7265 Alpine Silver Lake, Sierra Nevada. Comment
  SEINET4853241  Elatine gracilis Herbert L. Mason 1952-8-17 14494 Sierra 0.4 mi S of Little Truckee River bridge. 1921 Comment
  UC1101552  Elatine heterandra Herbert L. Mason 1945-6-29 12625 Lake Boggs Lake base of Mt, Hanna Comment
  UC1111019  Elatine heterandra Herbert L. Mason 1937-5-27 11554 b Lake s side Mt. Konocti Comment
  RSA312321  Elatine heterandra H. L. Mason 1953-6-8 14547 Lake Snows Lake. Comment
  UC1101533  Elatine triandra Herbert L. Mason 1933-9-2 7265 Amador Silver Lake Sierra Nevada Comment
  UC1101536  Elatine triandra Herbert L. Mason 1933-9-2 7257 Amador Silver Lake Sierra Nevada Comment
  UC1101539  Elatine triandra Herbert L. Mason 1947-8-8 13464 A Modoc nw Alturas (sw margin of Big Sage Reservior) Comment
  UC1100612  Eleocharis bella Herbert L. Mason 1947-8-13 13526 Modoc N of Canby (NE side of F reservoir) Comment
  UC1100615  Eleocharis bella Herbert L. Mason, Lawrence W. Reinecke 1937-7-22 11598 Tuolumne Swamp Lakes, just S of Miguel Meadows and W of Hetch Hetchy Dam Yosemite National Park Comment
  UC1102957  Eleocharis bella Herbert L. Mason 1958-8-6 14868 Tuolumne meadow at Swamp Lake, W side of Hetch Hetchy Dam Sierra Nevada, Yosemite National Park 1584 Comment
  UC632770  Eleocharis bella Herbert L. Mason 1938-7-13 11948 Mariposa Yosemite Valley, base of El Capitan Sierra Nevada, Yosemite National Park 1226 Comment
  UC1100608  Eleocharis bolanderi Herbert L. Mason 1938-7-25 Tuolumne ca. 4 mi N of Hetch Hetchy Lake (Snow-pool marsh, 1 mi S of Vernon Lake on trail to Beehive); Yosemite National Park 1981 Comment
  CAS-BOT-BC184098  Eleocharis coloradoensis Herbert L. Mason 1947-8-12 13512 Modoc Junction of North and South forks of Pit River, Alturas Comment
  UC1100607  Eleocharis coloradoensis Herbert L. Mason 1947-8-8 13463 Modoc NW of Alturas (SW margin of Big Sage Reservoir) 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
  UC1100726  Eleocharis macrostachya Herbert L. Mason, S. Galen Smith 1948-8-17 8337 Kings Grayson Comment
  UC1100743  Eleocharis macrostachya Herbert L. Mason 1947-8-15 13560 Modoc spring leading into W side of Goose Lake, 11 mi from Davis Creek Comment
  POM313062  Eleocharis parishii H. L. Mason 1948-9-2 13628 Kern Walker Pass Comment
  CAS-BOT-BC451538  Elodea canadensis H. L. Mason 1939-6-9 12104 a San Joaquin About 9 miles southeast of Stockton at junction of Austin Road and Little John Creek Comment
  UC632739  Elodea canadensis H. L. Mason 1939-4-16 12080 San Joaquin about 9 mi se Stockton (at junction of Austin Road and Little John Creek); Burnham Quad. Comment
  CAS-BOT-BC451524  Elodea canadensis Herbert L. Mason 1948-6-29 13589 Merced Delta road, 3 miles east of Los Banos [Banos] Comment
  UCD61430  Elymus elymoides H. L. Mason 1936-7-23 11313 Tuolumne Mt. Conness, Yosemite Natl. Park. Comment
  UCD61488  Elymus elymoides H. L. Mason 1936-7-27 11389 Tuolumne Gaylor Lakes, west of Tioga Pass, Yosemite Natl. Park. Comment
  UC965491  Elymus trachycaulus Herbert L. Mason 1952-8-16 14475 Nevada meadow opposite University of California Trout Laboratory; Sage Hen Creek 1981 Comment
  UC1178980  Emmenanthe penduliflora Herbert L. Mason 1946-5-30 12810 Lake East of Indian Valley, North Fork of Cache Creek 548 Comment
  UC1039627  Emmenanthe rosea Herbert L. Mason 1935-5-9 8309 Stanislaus Red Mountains, Arroyo del Puerto, Mount Hamilton Range Comment
  UC1093646  Ephedra trifurca Herbert L. Mason 1957-3-31 14683 Imperial near Yuma (desert w of the sand hills) Comment
  UC1191734  Epilobium brachycarpum Herbert L. Mason and Verne Grant 1947-7-10 13334 Modoc 2 mi e Alturas; Dorris Reservoir Comment
  UC634652  Epilobium canum subsp. canum H. L. Mason 1930-10-25 5781 Monterey between Santa Lucia Ranger Station (along river, foothills of mts.); Santa Lucia Mountains, San Antonio River 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
  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
  UC712635  Epilobium hornemannii subsp. hornemannii H. L. Mason 1936-7-31 11474 Mono e Saddlebag Lake; Sierra Nevada, Tioga Pass region, Tioga Crest 3413 Comment
  UC1056443  Epilobium obcordatum Herbert L. Mason 1938-7-30 Tuolumne Tower Peak Sierra Nevada, Yosemite National Park (near summit) Comment
  UC635384  Epilobium obcordatum H. L. Mason 1923-9-19 784 Tuolumne upper lake Sierra Nevada Mountains, Yosemite National Park, Gaylor Lake (near Tioga Mines) Comment
  POM310939  Epilobium oregonense H. L. Mason 1952-7-16 14345 Nevada Sage Hen Creek, 1 mile W of University of California Trout Laboratory. 1982 Comment
  UC1191613  Epilobium pallidum Herbert L. Mason and Verne Grant 1947-7-13 13441 Modoc on Hwy 395 n Davis Creek (e side of lake, near roadside); Goose Lake, Joseph Creek Comment
  UC912688  Equisetum X ferrissii Herbert L. Mason 1936-7-12 11212 Mariposa Yosemite Valley; Yosemite Valley, Merced River Comment
  UC1076463  Equisetum hyemale subsp. affine H. L. Mason June 1930 5673 Marin Inverness Ridge Comment
  POM312960  Equisetum laevigatum H. L. Mason 1953-7-7 14557 Sierra N of Sattley, Sierra Valley. 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
  UC1100249  Eragrostis hypnoides Herbert L. Mason 1945-8-24 12678 Lake e shore Lower Lake; e shore Lower Lake Comment
  UCD63369  Eragrostis hypnoides Herbert L. Mason; S. Galen Smith 1948-8-18 8348 -A Kings Along a canal just west of Stratford. Comment
  UC1575670  Eragrostis lutescens Herbert L. Mason and S. Galen Smith 1948-7-29 8253 Merced at end of Turner Island road e Los Banos Comment
  UC1076197  Eremalche parryi Herbert L. Mason 1940-5-3 12256 Merced 2 mi. n.e. Ortigalita; S. Coast Ranges, Ortigalita Canyon 304 Comment
  UC634838  Eremalche parryi H. L. Mason 1930-3-30 5537 San Benito 14 mi. below Pinnacles; San Benito R. Canyon Comment
  UC581163  Eremalche rotundifolia H. L. Mason 1935-3-29 8231 San Bernardino 1 mi. s. Trona (w. side Searles Lake); Mojave Desert, Searles Lake Comment
  POM310908  Eriastrum abramsii H. L. Mason 1935-5-3 8302 Santa Clara Above Arroyo Bayo Creek, Mount Hamilton Range 610 Comment
  SEINET4407887 Image available Eriastrum brandegeeae H. L. Mason 1945-1 12604 Lake Comment
  UC1051493  Eriastrum diffusum subsp. coachellae Herbert L. Mason 1952-4-7 14214 Riverside Palm Springs Palm Canyon. Comment
  CAS-BOT-BC514478  Eriastrum eremicum subsp. eremicum Herbert L. Mason 1926-4-27 3070 San Bernardino Near Victorville 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
  UC1178959  Eriastrum signatum Herbert L. Mason 1957-7-5 14714 Lassen s Madeline; Madeline Plains Comment
  CAS-BOT-BC286924  Ericameria ericoides Herbert L. Mason 1928-10-3 4993 a Monterey 10 miles up Carmel River Comment
  GH387385  Ericameria ericoides H. L. Mason 1936-9-13 11525 Unknown Prunedale, nine miles north of Salinas Comment
  GH387403  Ericameria ericoides H. L. Mason 1936-9-13 11525 Unknown Prunedale, nine miles north of Salinas 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
  CAS-BOT-BC286935  Ericameria ericoides Herbert L. Mason 1936-9-13 11525 Monterey Prunedale, nine miles north of Salinas Comment
  UC581132  Ericameria linearifolia H. L. Mason 1934-3-28 8010 Kern 4 mi e Onyx; Kern River Canyon Comment
  UC912314  Ericameria linearifolia Herbert L. Mason 1926-4-26 2968 Los Angeles summit of 1st grade, Mint Canyon Road Comment
  UC1192131  Ericameria nauseosa var. oreophila Herbert L. Mason and Verne Grant 1947-7-12 13409 Modoc sw of Alturas (w side of the South Fork of Pit River Valley; Vernal pool); South Fork of Pit River Valley Comment
  YM-YOSE63810  Erigeron breweri Harry L. Mason 1938-7-7 11869 Tuolumne SWAMP LAKE RESEARCH RESERVE Comment
  UC1178977  Erigeron coulteri Herbert L. Mason 1937-7-28 14845 Tuolumne ne side of Mary Lake (near Saurian Crest); Yosemite National Park, Mary Lake 2895 Comment
  UC1191221  Erigeron coulteri Herbert L. Mason 1939-8-3 12204 Placer n of Lake Tahoe (Squaw Creek Valley); Squaw Creek Valley 1889 Comment
  UC672232  Erigeron lonchophyllus H. L. Mason 1923-8-21 751 Tuolumne at junction of Lyell Fork and Dana Fork (Tuolumne River, n base of Puppy Dome); Sierra Nevada Mountains, Yosemite National Park, Puppy Dome Comment
  UC1192213  Erigeron pumilus var. intermedius Herbert L. Mason 1948-7-18 13609 Siskiyou Grass Lake Comment
  POM312495  Erigeron pumilus var. intermedius H. L. Mason 1948-7-18 13609 Siskiyou Grass Lake Comment
  UC1081542  Erigeron pygmaeus Herbert L. Mason 1936-7-28 11414 Mono Dana Plateau 3505 Comment
  UC712512  Erigeron pygmaeus Herbert L. Mason 1936-7-31 11467 Mono e of Saddlebag Lake; Sierra Nevada, Tioga Crest 3474 Comment
  POM311048  Eriodictyon capitatum H. L. Mason 1947-5-2 13208 Santa Barbara Pine canyon, Purissima Hills. Comment
  SEINET5499697  Eriodictyon capitatum H. L. Mason 1947-1 Santa Barbara Comment
  CAS-BOT-BC248522  Eriogonum angulosum H. L. Mason 1930-10-25 5787 Monterey Foothills of the Santa Lucia Mountains between Jolon and Santa Lucia Ranger Station along the San Antonio River Comment
  UC635081  Eriogonum angulosum Herbert L. Mason 1926-4-26 2996 Los Angeles 1 mi e Palmdale; Mohave Desert Comment
  CAS-BOT-BC248728  Eriogonum arborescens Herbert L. Mason 1927-9-24 4095 Santa Barbara Near West Willow Creek, Santa Cruz Island Comment
  SEINET3836444 Image available Eriogonum arborescens Herbert L. Mason 1927-9-23 4084 Santa Barbara Prisoners Harbor, Santa Cruz Island Comment
  GH369968  Eriogonum argillosum H. L. Mason 1930-3-30 Unknown Canyon of the San Benito River, 14 miles south of Hollister Comment
  UC623311  Eriogonum compositum var. compositum H. L. Mason 1939-5-18 12101 Napa near St. Helena (near summit of Spring Mountain Grade); Spring Mountain Grade Comment
  UC635433  Eriogonum gracile H. L. Mason September, 1930 5910 Monterey low hills at upper end of Elkhorn Slough between Watsonville and Castroville; Elkhorn Slough Comment
  UC1178903  Eriogonum incanum Herbert L. Mason 1938-7-28 12032 Tuolumne n Tiltill Mountain (Macomb Ridge); Sierra Nevada, Yosemite National Park, Macomb Ridge 3017 Comment
  UC635000  Eriogonum inflatum var. inflatum H. L. Mason 1928-3-10 4230 Riverside Hidden Springs Canyon Coachella Mountains, Hidden Springs Canyon 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
  CAS-BOT-BC261387  Eriogonum nudum var. deductum Herbert L. Mason 1938-7-28 12027 Tuolumne Sierra Nevada, Yosemite National Park. Macomb Ridge, north of Tiltill Mountain 3017 Comment
  UC635076  Eriogonum nudum var. deductum Herbert L. Mason 1925-7-29 2181 Tuolumne Mather Comment
  UC635014  Eriogonum nudum var. oblongifolium H. L. Mason 1928-7-10 4885 Sonoma Jenner Comment
  CAS-BOT-BC269822  Eriogonum nudum var. pubiflorum H. L. Mason 1929-9-21 5433 Contra Costa Along Marsh Creek Road three miles above Clayton Comment
  UC635005  Eriogonum nudum var. pubiflorum H. L. Mason 1929-9-21 5433 Contra Costa 3 mi above Clayton (Marsh Creek road) Comment
  CAS-BOT-BC271967  Eriogonum nudum var. pubiflorum H. L. Mason 1929-10-4 5450 Placer Three miles south of Roseville on Folsom Road Comment
  UC641822  Eriogonum ovalifolium var. nivale H. L. Mason 1936-7-31 11465 Mono e Saddlebag Lake (Tioga Crest); Sierra Nevada, Tioga Crest Comment
  UC641993  Eriogonum ovalifolium var. nivale H. L. Mason 1936-7-23 11285 Tuolumne alpine slopes of Mount Conness Sierra Nevada, Mount Conness Comment
  UC635085  Eriogonum reniforme Herbert L. Mason 1929-4-28 3101 San Bernardino Box S Ranch Mohave Desert, Box S Ranch Comment
  POM257236  Eriogonum spergulinum H. L. Mason 1928-7-4 4871 Tuolumne Common on granite soil flats near streams; Tuolumne Meadows. Comment
  CAS-BOT-BC269960  Eriogonum spergulinum var. reddingianum Herbert L. Mason 1924-6-20 1080 Plumas Between Gold Lake & Bear Lake Comment
  UC634993  Eriogonum umbellatum var. nevadense Herbert L. Mason 1924-6-18 1051 Plumas Graeagle Comment
  UC1093643  Eriogonum vimineum Herbert L. Mason 1947-7-10 13335 Modoc 2 air mi e Alturas (on mesa); Doris Reservoir Comment
  UC1106326  Eriophorum gracile Herbert L. Mason, B. Fuller, and H. Whisler 1958-7-13 24 Nevada 1 mi. w. U.C. Trout Lab. (12 mi. n. of Truckee, Sage Hen Creek); Sierra Nevada, Sage Hen Creek 1981 Comment
  UC965495  Eriophorum gracile Herbert L. Mason 1952-8-16 14481 Nevada meadow opposite U.C. Trout Lab. (Sage Hen Creek); Sierra Nevada, Sage Hen Creek 1981 Comment
  UC673595  Eriophyllum ambiguum var. ambiguum Herbert L. Mason 1940-3-21 12229 Kern between Hobo Hot Springs and Democrat Springs; Kern Canyon Comment
  UC566762  Eriophyllum confertiflorum var. confertiflorum H. L. Mason 1926-4-26 2957 Los Angeles 4 mi w Saugus Comment
  UC566764  Eriophyllum confertiflorum var. confertiflorum H. L. Mason 1923-6-15 392 Santa Barbara Harris grade Comment
  GH427091  Eriophyllum jepsonii H. L. Mason 1935-5-8 10008 Unknown Patterson Road, twenty miles from mouth of Arroyo del Puerto, Mount Hamilton Range 533 Comment
  UC507050  Eriophyllum lanatum var. achilleoides L. R. and H. L. Mason 1933-4-30 E 16 Lake between Middleton and Pope Valley (Serpentine Ridge, about 1 mi from Etna Springs); Serpentine Ridge Comment
  UC912251  Eriophyllum lanatum var. arachnoideum Herbert L. Mason 1934-4-28 8096 Sonoma Dohrman Creek Comment
  POM256520  Eriophyllum lanatum var. arachnoideum H. L. Mason 1934-4-28 8096 Sonoma Jansen Ranch, at head of Dohrman Creek, four miles west of Healdsburg Comment
  UC566755  Eriophyllum lanatum var. grandiflorum H. L. Mason 1926-5-28 3275 Placer 5 mi above Auburn Comment
  UC1178871  Eriophyllum lanatum var. integrifolium Herbert L. Mason 1938-7-26 12018 Tuolumne s Jack Main Meadows; Yosemite National Park, Andrew Peak 2438 Comment
  UC566746  Eriophyllum pringlei H. L. Mason 1926-4-26 2997 Los Angeles 1 mi e Palmdale Comment
  UC566751  Eriophyllum wallacei H. L. Mason 1926-4-26 3019 Los Angeles Little Rock Comment
  UC571139  Erodium macrophyllum H. L. Mason 1929-3-15 5060 Contra Costa about 5 mi from Brentwood (Marsh Creek Road) Comment
  SFV16503  Erodium moschatum S. Mason, H. M. Mason 1993-3-21 34 Los Angeles San Fernando Valley Los Angeles, Sepulveda. Backyard of 9629 Langdon Ave. 267 Comment
  UC1191957  Eryngium alismifolium Herbert L. Mason 1947-8-12 13511 Modoc Alturas, junction of N. and S. Forks of Pit River Comment
  UC1191958  Eryngium castrense Herbert L. Mason and Verne Grant 1946-9-4 13101 Sutter Colusa Gun Club Comment
  CAS-BOT-BC41526  Erysimum capitatum H. L. Mason 1933-4-9 7189 Contra Costa East of Antioch along the San Joaquin River. 12 Comment
  CAS-BOT-BC54448  Erysimum capitatum H. L. Mason 1932-3-19 6820 San Joaquin Two miles east of Midway between Mountain House and Tracy. Comment
  UC1081568  Erysimum capitatum Herbert L. Mason 1936-4-11 11060 Calaveras s Sheep Ranch; San Antonio Creek Comment
  UCD114980  Erysimum capitatum Steve Mason 1993-5-1 26 Los Angeles on Sulfur Springs Road, 200 feet off Angeles Crest Highway on right roadcut. 1798 Comment
  GH379526  Erysimum capitatum var. angustatum H. L. Mason 1933-4-9 7189 Unknown East of Antioch along the San Joaquin River 12 Comment
  CAS-BOT-BC153813  Erythranthe filicaulis C. T. Mason, Jr. 1954-6-7 1545 Tuolumne East of Carnegie Institution Camp, Hog Ranch, Mather 1371 Comment
  UC1077102  Erythranthe grayi Herbert L. Mason 1938-7-16 11953 Madera 4 mi s Miami Ranger Station; Sierra Nevada 1219 Comment
  UC635614  Eschscholzia caespitosa H. L. Mason 1923-6-30 301 Tuolumne roadside above Oakland Recreation Camp at South Fork 1066 Comment
  CAS-BOT-BC402896  Eschscholzia caespitosa H. L. Mason 1923-6-30 301 Tuolumne Above the Oakland Recreation Camp at South Fork 1066 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-BC403545  Eschscholzia californica H. L. Mason 1922-3-26 s.n. San Mateo Mouth of Gazos Creek Comment
  CAS-BOT-BC403546  Eschscholzia californica H. L. Mason 1922-4-1 s.n. San Mateo At Pigeon Point Light Comment
  UC635605  Eschscholzia lobbii H. L. Mason 1929-3-24 5099 Madera 18 mi e Madera (at junction of Yosemite Rd) Comment
  UC635609  Eschscholzia parishii H. L. Mason 1928-3-10 4191 Riverside Whitewater River Comment
  UC673635  Euchiton sphaericus H. L. Mason 1930-8-1 5732 Lake road to Bartlett Mountain Comment
  RSA114066  Eucrypta micrantha H. L. Mason 1952-4-11 14253 San Bernardino Black lavas north of Pisgah Crater. Comment
  CAS-BOT-BC202772  Euonymus occidentalis H. L. Mason 1928-7-11 4890 Sonoma Canyon 2 miles north of Fort Ross Comment
  CAS-BOT-BC202773  Euonymus occidentalis H. L. Mason 1925-11-26 2497 Sonoma Near Monte Rio Comment
  RSA116765  Euonymus occidentalis H. L. Mason 1921-1 s.n. San Mateo San Francisquito Creek near Searsville Lake. Comment
  UC635616  Euonymus occidentalis var. occidentalis H. L. Mason 1924-5-18 1016 San Mateo Jasper Ridge near Stanford (creek below sand hill caves); Jasper Ridge Comment
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Sep 19 2011
  UC635624  Euonymus occidentalis var. occidentalis H. L. Mason 1925-11-26 2497 Sonoma stream bank near Monte Rio Comment
  UC570798  Euphorbia crenulata H. L. Mason 1926-3-7 2701 Contra Costa Mount Diablo Comment
  SD46096  Euphorbia eriantha Herbert L. Mason 1952-4-9 14232 San Bernardino 10 miles south of Needles 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
  UC571106  Fagonia laevis H. L. Mason 1928-3-10 4247 Riverside between Indio and Palm Springs Comment
  UC965503  Festuca rubra Herbert L. Mason 1952-7-19 14419 Nevada meadow opposite Univ. of Calif. Trout Laboratory; Sage Hen Creek 1981 Comment
  UCD66424  Festuca saximontana var. purpusiana H. L Mason 1936-7-24 11334 Tuolumne White Mountain. Comment
  SEINET190344  Filago gallica H. L. Mason 1932-4-28 7042 Monterey Pajaro Hills Comment
  UC1100691  Fimbristylis vahlii Herbert L. Mason and S. Galen Smith 1948-7-29 8246 Merced e Los Banos (salt slough at end of Turner Island road) Comment
  UC1100692  Fimbristylis vahlii Herbert L. Mason and S. Galen Smith 1948-7-29 8246 Merced e Los Banos (salt slough at end of Turner Island road) Comment
  GH376201  Frankenia salina H. L. Mason 1928-9-30 4967 Unknown San Joaquin Delta near Holt Comment
  GH401236  Fraxinus latifolia H. L. Mason 1928-5-3 4490 a Unknown Near Cosumnes River bridge at mouth of Clark Creek Comment
  UC566913  Fraxinus latifolia H. L. Mason 1925-9-17 2225 Marin Ross Valley to Lake Lagunitas Comment
  A422632  Fremontodendron californicum H. L. Mason 1935-5-30 10009 Unknown Four miles north of Knoxville Mines Comment
  GH422602  Fremontodendron californicum H. L. Mason 1935-5-30 10009 Unknown Four miles North of Knoxville Mines Comment
  UC635468  Fremontodendron californicum H. L. Mason 1927-5-25 Santa Cruz On way to China Grade Trail, Big Basin Comment
Read comments
Nov 26 2017
  SEINET5518602  Fremontodendron californicum subsp. napense Herbert L. Mason 1935-1 10009 Napa Four miles north of Knoxville Mines Comment
  CAS-BOT-BC130031  Fritillaria affinis H. L. Mason 1917-4-28 s.n. Marin Mt. Tamalpais Comment
  UC672113  Fritillaria affinis Herbert L. Mason 1925-3-1 1268 San Francisco San Francisco, Bernal Heights Bernal Heights; San Francisco, Bernal Heights Comment
  UC1076048  Fritillaria pudica Herbert L. Mason 1947-5-17 14778 Siskiyou summit of Scott Mountain grade Scott Mountain Comment
  UC665686  Fritillaria purdyi Herbert L. Mason 1941-3-16 12385 Lake 3 mi e of Middletown (Inner North Coast Range); Inner North Coast Range Comment
  UC672097  Fritillaria recurva Herbert L. Mason 1926-3-21 2775 Lake Middletown to Mount St. Helena via Toll House Canyon Toll House Canyon; Mount St. Helena, Toll House Canyon Comment
  UC1039517  Galium andrewsii subsp. andrewsii Herbert L. Mason 1930-6-1 5678 Lake St. Helena Creek Mt. St. Helena Comment
  UC632798  Galium porrigens H. L. Mason 1936-4-11 11063 Calaveras s Sheep Ranch; San Antonio Creek Comment
  SBBG27404  Galium trifidum H. L. Mason 1936-7-12 11241 Mariposa Peregoy Meadow, Glacier Point Rd 2255 Comment
  UC1111587  Galium trifidum Herbert L. Mason 1941-10-19 12530 Mendocino Fort Bragg 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
  POM256483  Galium trifidum var. pusillum H. L. Mason 1936-7-12 11241 Mariposa Peregoy Meadow. Glacier Point road. Yosemite National Park. 2256 Comment
  UC672200  Gamochaeta ustulata H. L. Mason 1932-5-6 7069 Alameda Oakland Hills Comment
  UC634765  Garrya elliptica H. L. Mason 1926-1-9 2634 Alameda head of San Leandro Canyon Comment
  UC634769  Garrya elliptica H. L. Mason 1932-7-21 7105 Humboldt Big Lagoon Comment
  UC634816  Garrya elliptica H. L. Mason 1925-9-12 2223 Contra Costa head of San Leandro Creek Canyon; Oakland Hills Comment
  UC634641  Garrya fremontii H. L. Mason 1924-6-18 1053 Plumas road between Graeagle and Gold Lake Comment
  UC634834  Garrya fremontii H. L. Mason 1925-1-22 1201 Napa Wooden Valley Grade Comment
  UC634787  Garrya veatchii H. L. Mason 1927-6-14 3760 San Bernardino San Antonio Canyon; San Gabriel Mountains 1219 Comment
  UC1093945  Gaultheria humifusa Herbert L. Mason 1941-7-14 12520 Madera Yosemite National Park, Ottoway Lake Ottoway Lake; Sierra Nevada, Yosemite National Park, Ottoway Lake 2987 Comment
  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
  UC1056423  Gayophytum racemosum Herbert L. Mason 1938-7-29 12051 Tuolumne w Tower Peak; Yosemite National Park, Saurian Crest 3200 Comment
  UC1111601  Gayophytum racemosum Herbert L. Mason 1941-7-14 12525 Madera Ottoway Lake Sierra Nevada, Yosemite National Park 3048 Comment
  UC1191624  Gayophytum racemosum Herbert L. Mason and Verne Grant 1947-7-9 13310 a Modoc Cedar Pass Warner Range (summit of Range) 1920 Comment
  POM312608  Gayophytum racemosum H. L. Mason 1948-7-17 13603 Siskiyou Eastern Grass Lake. Comment
  UC566948  Gentiana newberryi H. L. Mason 1923-8-6 716 Tuolumne Lyell Fork Sierra Nevada Mountains, Yosemite National Park Comment
  UC566923  Gentiana sceptrum H. L. Mason Aug 1930 5737 Mendocino Fort Bragg Comment
  UC1083129  Geranium dissectum Herbert L. Mason 1936-4-10 11050 Calaveras on road from Murphy to Angel Camp Comment
  UC571131  Geranium molle H. L. Mason 1927-4-26 5212 Marin road from Fairfax to crest of Bolinas (via Alpine Dam) Comment
  UC908811  Gilia achilleifolia subsp. multicaulis Herbert L. Mason 1928-5-6 4561 Alameda Cedar Mountain Mount Hamilton Range, Cedar Mountain Comment
  UC909024  Gilia angelensis Herbert L. Mason 1926-4-26 2942 Los Angeles upper road Pacoima Wash foothills San Gabriel Mountains, Pacoima Wash (foothills of San Gabriel Mountains) Comment
  UC908804  Gilia brecciarum subsp. neglecta Herbert L. Mason 1935-4-30 8343 Kern Walker Pass Comment
  UC908829  Gilia brecciarum subsp. neglecta Herbert L. Mason 1935-3-29 8206 Kern two mi n Mohave; Mohave Desert, n of Mohave Comment
  UC908400  Gilia capitata subsp. abrotanifolia Herbert L. Mason 1935-5-1 8365 Tulare Kern River n Kernville (Sequoia National Forest); , Kern River n of Kernville Comment
  UC908401  Gilia capitata subsp. abrotanifolia Herbert L. Mason 1926-4-26 2952 Los Angeles 4 mi w Saugus; w of Saugus Comment
  UC907855  Gilia capitata subsp. abrotanifolia Herbert L. Mason 1949-4-25 14012 Ventura Ojai-Maricopa Road one mi below Wheeler Hot Springs; below Wheeler Hot Springs Comment
  RSA23088  Gilia capitata subsp. chamissonis H. L. Mason, Annetta Carter 1938-5-18 11840 Marin Point Reyes Peninsula, 12.5 miles from Inverness. Comment
  UC908158  Gilia capitata subsp. pedemontana Herbert L. Mason 1926-5-24 3281 Nevada 5 mi s Grass Valley (Rattlesnake Creek); , s of Grass Valley 609 Comment
  UC908210  Gilia capitata subsp. pedemontana Charles Mason 1949-5-10 1288 a Mariposa along road 1 mi s Mormon Bar (between Mariposa and Raymond); s of Mormon Bar, btw Mariposa and Raymond Comment
  UC908354  Gilia clivorum Herbert L. Mason 1935-3-30 8248 San Luis Obispo Cholame Valley Comment
  UC909016  Gilia clivorum H. L. Mason 1928-4-25 4375 San Francisco Hunter's Point , Hunter's Point (San Francisco) Comment
  UC909028  Gilia clivorum Herbert L. Mason 1932-4-28 7040 Monterey e Watsonville (Pajaro Hills); e of Watsonville, Pajaro Hills Comment
  CAS-BOT-BC226221  Gilia interior Herbert L. Mason 1949-4-23 14007 Kern Two miles east of Hobo Hot Springs, Kern River Canyon Comment
  CAS-BOT-BC226222  Gilia interior Herbert L. Mason 1935-5-2 8385 Kern Piute, Kern River Canyon drainage 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-BC226339  Gilia latiflora subsp. davyi Herbert L. Mason 1932-4-1 6869 Los Angeles One mile east of Lancaster, Mohave [Mojave] Desert Comment
  CAS-BOT-BC226338  Gilia latiflora subsp. davyi Herbert L. Mason 1934-3-30 8037 Los Angeles Antelope Valley, Mohave [Mojave] Desert Comment
  CAS-BOT-BC225411  Gilia latiflora subsp. latiflora Herbert L. Mason 1926-4-27 3068 San Bernardino Two miles south of Victorville, Mohave Desert Comment
  CAS-BOT-BC226394  Gilia latiflora subsp. latiflora Herbert L. Mason 1926-4-26 2998 Los Angeles Little Rock Creek, 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
  UC908820  Gilia latiflora subsp. latiflora Herbert L. Mason 1926-4-26 2970 Los Angeles four mi s Vincent (Soledad Pass (Mint Cayon Highway)); Soledad Pass, s of Vincent Comment
  UC908839  Gilia latiflora subsp. latiflora Herbert L. Mason 1926-4-26 3004 Los Angeles Little Rock Creek Mohave Desert, Little Rock Creek Comment
  CAS-BOT-BC225410  Gilia latiflora subsp. latiflora Herbert L. Mason 1926-4-28 3109 San Bernardino Cajon Pass Comment
  SEINET12271308  Gilia latifolia H. L. Mason 1935-1 8204 Kern 2 mi W of Randsburg, Mojave Desert Comment
  UC908819  Gilia leptantha subsp. transversa Herbert L. Mason 1926-4-27 3047 Los Angeles between Rock Creek and Little Rock Creek ((Big Pines Recreation Park Road), Los Angeles Co. Park Road, Mohave Desert); Mohave Desert, btw Rock Creek and Little Rock Creek Comment
  UC908888  Gilia leptantha subsp. transversa Herbert L. Mason 1926-4-28 3109 San Bernardino Cajon Pass Comment
  UC908432  Gilia malior Herbert L. Mason 1935-3-28 8201 San Bernardino two mi n Kramer Junction (Mohave Desert); , n of Kramer Junction 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
  UC908219  Gilia minor Herbert L. Mason 1935-4-1 6885 Kern five mi s Muroc (Mohave Desert); , s of Muroc Comment
  UC908221  Gilia minor Herbert L. Mason 1935-3-28 8189 San Bernardino s Barstow (Taylor Springs, Mohave Desert); Mohave Desert, s of Barstow, Taylor Springs Comment
  UC908481  Gilia minor Herbert L. Mason 1935-3-28 8180 San Bernardino three mi s Barstow (Mohave Desert); , s of Barstow Comment
  UC908220  Gilia minor Herbert L. Mason 1935-3-28 8200 San Bernardino one mi n Kramer Junction (Mohave Desert); , n of Kramer Junction Comment
  UC908808  Gilia modocensis Herbert L. Mason 1946-6-8 12853 Santa Barbara summit of road San Rafael Mountains, Big Pine Mountain (Big Pine Mountain, San Rafael Mountains) Comment
  CAS-BOT-BC407618  Gilia ochroleuca subsp. exilis Herbert L. Mason 1926-4-30 3111 Riverside Temescal Canyon Comment
  CAS-BOT-BC407619  Gilia ochroleuca subsp. exilis Herbert L. Mason 1926-4-30 3112 Riverside Temecula Canyon, 1 mile S of Temecula 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-BC407839  Gilia ochroleuca subsp. ochroleuca Herbert L. Mason 1935-3-28 8192 San Bernardino Mohave Desert, Taylor Spring, N of Lucerne Valley 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
  UCD15431  Gilia scopulorum S. Mason,; H. Mason, and C. Katzfey 1995-4-23 54 Los Angeles California, Los Angeles Co.; in the northern foothills of Transverse Range/Mojave Desert foothills near Little Rock; along Mt. Emma Road, 0.8 miles above Ft. Tejon Rd.; along the right side of the road in a road cut; 914 Comment
  UC908825  Gilia sinuata Herbert L. Mason 1935-3-28 8198 San Bernardino twelve mi w Barstow; Mohave Desert, w of Barstow 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
  UC1051478  Gilia stellata Herbert L. Mason 1952-4-11 14257 San Bernardino Black lavas n Pisgah Crater; Black lavas n of Pisgah Crater Comment
  UC1051480  Gilia subacaulis Herbert L. Mason 1952-4-11 14256 San Bernardino Black lavas n Pisgah Crater; n of Pisgah Crater Comment
  UC908418  Gilia subacaulis Herbert L. Mason 1935-4-30 8287 San Bernardino sw Searles Lake (Poison Canyon); Mohave Desert, Poison Canyon sw of Searles Lake Comment
  UC908623  Gilia tricolor subsp. diffusa Herbert L. Mason 1934-3-28 8006 Kern Kern River Canyon Comment
  UC908560  Gilia tricolor subsp. tricolor Herbert L. Mason 1935-3-27 8172 Fresno along road to Firebaugh w Fresno; w of Fresno along road to Firebaugh Comment
  UC908597  Gilia tricolor subsp. tricolor Herbert L. Mason 1925-3-23 1310 Alameda Sunol Comment
  UC963782  Gilia tricolor subsp. tricolor Herbert L. Mason 1929-3-23 5097 Madera hills e Madera; e of Madera Comment
  UC908613  Gilia tricolor subsp. tricolor Herbert L. Mason 1926-3-14 2731 Napa Mount St. Helena Comment
  UC635647  Githopsis diffusa subsp. robusta H. L. Mason 1928-5-6 4572 Alameda Cedar Mountain Mount Hamilton Range Comment
  SEINET10464598  Githopsis specularioides Mason 1932-4-24 Mason 6984 Amador 3 miles south of Ione Comment
  UC1191699  Glaux maritima Herbert L. Mason 1946-6-9 12875 San Luis Obispo between Oceano and mouth of Santa Maria River (Dune Lakes); Dune Lakes Comment
  SD47954  Glossopetalon spinescens var. aridum Herbert L. Mason 1940-3-22 12237 Inyo Death Valley National Monument, Grapevine Mts, Titus Canyon Comment
  UCD66751  Glyceria borealis H. L. Mason 1938-7-9 11899 Tuolumne Yosemite Natl. Park. Swamp Lake, northwest of Hetch - Hetchy. Comment
  CAS-BOT-BC307345  Gnaphalium palustre Herbert L. Mason 1952-7-19 14430 Nevada Meadow opposite University of California Trout Laboratory, Sage Hen Creek, Sierra Nevada 1981 Comment
  SEINET8770731 Image available Gnaphalium palustre H. L. Mason 1952-1 14451 Sierra 1.5 miles east of Calpine at junction of Calpine with Sierraville-Beckwourth road. Sierra Valley 1524 Comment
  UC1192120  Gnaphalium palustre Herbert L. Mason and Verne Grant 1947-7-12 13425 Modoc s of Alturas (along rr tracks); Pit River Valley Comment
  UC581124  Gnaphalium palustre H. L. Mason 1933-5-29 7245 El Dorado Shingle Springs Comment
  CAS-BOT-BC302582  Gnaphalium palustre H. L. Mason 1934-5-5 8125 Lake Near Hildebrand Ranch, southeast of Kelseyville 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
  UC775195  Goodyera oblongifolia Herbert L. Mason 1940-10-13 Mendocino 2 mi n of Fort Bragg (Little Valley); Little Valley Comment
  JEPS21897  Gratiola ebracteata Herbert L. Mason 1945-6-29 12621 Lake Boggs Lake at base Mount Hanna; base of Mount Hanna, Boggs Lake Comment
  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
  UC672548  Gratiola ebracteata H. L. Mason 1929-4-7 5197 Calaveras three mi above Valley Spring; above Valley Spring Comment
  CAS-BOT-BC26127  Gratiola heterosepala H. L. Mason; Rimo Bacigalupi 1953-6-8 14544 Lake in Boggs Lake, at southeastern shore 883 Comment
  CAS-BOT-BC229890  Gratiola neglecta Herbert Louis Mason; Verne Grant 1947-7-12 13393 Modoc Jones' Lane, off Hwy 395, several miles S of Alturas. Comment
  UC1191879  Gratiola neglecta Herbert L. Mason and Verne Grant 1947-7-12 13393 Modoc off highway 395 several mi s Alturas (irrigation ditch by Jones' Lane) Comment
  UC1051437  Gratiola neglecta Herbert L. Mason 1955-8-14 14656 Modoc n Rim Rock Reservoir (Drift Fence Reservoir); , n of Rim Rock Reservoir Comment
  UC1076317  Grayia spinosa Herbert L. Mason 1926-4-26 2992 Los Angeles 1 mi. e. Palmdale Comment
  CAS-BOT-BC304560  Grindelia hirsutula H. L. Mason 1921-7-3 s.n. San Mateo Pescadero - La Honda Road Comment
  UC1093968  Grindelia hirsutula Herbert L. Mason 1930-6-1 5653 Sonoma mouth of Gualala River Gualala River 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
  UC1083163  Guillenia lasiophylla H. L. Mason 1926-4-10 2806 Alameda Cedar Mountain via Arroyo Mocho Canyon Mount Hamilton Range Comment
  UC1076516  Gutierrezia californica H. L. Mason 1929-9-21 5435 Contra Costa 3 mi above Clayton (Marsh Creek road) Comment
  UC1093941  Hackelia micrantha Herbert L. Mason 1941-7-7 12512 Madera just s of the Givens Lake Trail junction; Sierra Nevada, Yosemite National Park 2865 Comment
  SEINET10605896  Hainardia cylindrica Mason 1935-6-15 Mason 9041 Monterey Mound Meadow, Point Lobos State Park. Comment
  UC1111602  Harmonia hallii Herbert L. Mason 1940-5-10 12285 Lake 3 mi e Middletown Comment
  CAS-BOT-BC510393  Hastingsia alba Herbert L. Mason 1950-7-15 14051 Trinity Summit of grade, Scott Mountain Comment
  UC912312  Hazardia squarrosa var. grindelioides Herbert L. Mason 1929-10-12 5494 San Luis Obispo 8.4 mi from Atascadero Comment
  UC565501  Hedypnois rhagadioloides H. L. Mason 1928-4-13 4333 Sonoma hills between Santa Rosa and Calistoga (Reili School) Comment
Read comments
Mar 30 2009
  UC566768  Helenium bolanderi H. L. Mason 1930-6-1 5625 Mendocino Fort Bragg Comment
  CAS-BOT-BC211489  Helianthemum scoparium H. L. Mason 1926-4-30 3118 San Diego Pala Grade to Palomar Mountain 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
  UC1076489  Herniaria hirsuta subsp. hirsuta Herbert L. Mason 1923-7-21 636 Tuolumne Hetch Hetchy , Hetch Hetchy (Yosemite National Park) 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
  CAS-BOT-BC310168  Hesperevax caulescens H. L. Mason 1939-4-16 12081 San Joaquin About 9 miles southeast of Stockton at junction of Austin Road and Little John Creek Comment
  SBBG26795  Hesperevax caulescens H. L. Mason 1939-4-16 12081 San Joaquin ca. 9 mi SE of Stockton at jct of Austin Rd and Little John Crk Comment
  UC581116  Hesperevax sparsiflora var. sparsiflora H. L. Mason 1934-4-28 8082 Sonoma Jensen's Ranch; Dohrmann Creek Comment
  UC672276  Hesperevax sparsiflora var. sparsiflora H. L. Mason 1932-4-17 6941 Santa Clara 1 mi e of New Almaden Comment
  UC672278  Hesperevax sparsiflora var. sparsiflora H. L. Mason 1933-4-30 7226 Lake near Aetna Springs Comment
  UC672280  Hesperevax sparsiflora var. sparsiflora H. L. Mason 1928-4-28 4411 Marin Tiburon Peninsula Comment
  UC672281  Hesperevax sparsiflora var. sparsiflora H. L. Mason 1928-4-25 4374 San Francisco Hunter's Point Comment
  UC581114  Hesperevax sparsiflora var. sparsiflora H. L. Mason 1934-4-28 8098 Sonoma Highway between Santa Rosa and Healdsburg Comment
  UC1178019  Hesperocallis undulata Herbert L. Mason 1952-4-10 14245 San Bernardino 20 mi sw of Baker (Cronise Valley, on Highway 91-466); Cronise Valley Comment
  UC980826  Hesperochiron pumilus Herbert L. Mason and Robert Sweeney 1953-4-17 14515 Lake due w. Lakeport (Four Mile Glade, Cow Mt.); Cow Mt., Four Mile Glade 914 Comment
  UC1212443  Hesperolinon californicum Herbert L. Mason 1946-5-30 12795 Lake near Middletown; Inner North Coast Ranges, Locomono Creek Comment
  CAS-BOT-BC176040  Hesperolinon clevelandii H. L. Mason 1934-5-5 8112 Lake East side of Mount Konocti Comment
  UC571119  Hesperolinon congestum H. L. Mason 1928-4-28 4409 Marin Tiburon Peninsula Comment
  SD51683  Hesperolinon disjunctum Herbert L. Mason 1952-6-19 14304 Glenn Black Diamond Ridge, Mendocino National Forest. 822 Comment
  UC1212509  Hesperolinon disjunctum Herbert L. Mason 1952-6-19 14306 Glenn Black Diamond Ridge Inner North Coast Ranges Comment
  CAS-BOT-BC179175  Hesperolinon micranthum Herbert L. Mason 1946-7-13 13448 Modoc W end of Fandango Pass, near Goose Lake. Comment
  UC1056970  Hesperolinon micranthum Herbert L. Mason 1936-5-15 11124 Mariposa summit of road between Coulterville and Bagby Comment
  RSA151710  Hesperolinon micranthum H. L. Mason 1952-6-15 14297 Lake Butts Creek road southeast of Middletown. Comment
  POM312837  Heteranthera dubia H. L. Mason, Verne Grant 1946-8-14 13041 Butte Butte Sink Comment
  UC1100978  Heteranthera dubia Herbert L. Mason and Verne Grant 1946-8-14 13041 Butte Butte Sink Comment
  UC635690  Heterocodon rariflorum H. L. Mason 1932-4-24 6974 San Joaquin 11 mi s Clements Comment
  UC635691  Heterocodon rariflorum H. L. Mason 1923-7-12 578 Tuolumne Mather; Sierra Nevada Mountains, Yosemite National Park Comment
  UC555293  Heteromeles arbutifolia H. L. Mason 1926-1-1 2581 Mendocino Upper Lake to Elk Mt. Comment
  UC672168  Heterotheca grandiflora Herbert L. Mason 1927-10-4 4122 Santa Cruz Ano Nueva Pt. Mouth of Waddell Creek, Ano Nueva Pt. Comment
  UC912305  Heterotheca grandiflora Herbert L. Mason 1926-4-25 2901 Orange 5 mi s Laguna Comment
  UC1093930  Heterotheca oregona var. oregona Herbert L. Mason Nov 26 1925-Nov 27 1925 2493 Sonoma Monte Rio, along Russian River Russian River Comment
  UC1076520  Heterotheca sessiliflora subsp. echioides Herbert L. Mason 1927-7-31 3999 Santa Cruz hills s Mount Herman Comment
  GH363379  Heuchera pilosissima H. L. Mason 1928-4-8 4286 Unknown Coast 2 miles N. of Ft. Ross Comment
  UC1192277  Hibiscus lasiocarpos Herbert L. Mason 1945-7-11 12649 Colusa 3 mi above Colusa (plains near Butte Creek, Butte Lodge Outing Club) Comment
  UC1179073  Hieracium triste Herbert L. Mason 1936-7-30 14819 Tuolumne Tilden Lake; Yosemite National Park 2895 Comment
  UC565524  Hieracium triste H. L. Mason 1923-8-3 707 Tuolumne w of Unicorn Creek; Yosemite National Park, Tuolumne Meadows Comment
  CAS-BOT-BC312980  Hieracium triste Herbert L. Mason 1936-7-30 14819 Tuolumne Sierra Nevada, Yosemite National Park. Tilden Lake 2895 Comment
  UC1191992  Hippuris vulgaris Herbert L. Mason 1948-9-5 13670 Mono junction of Hwys. 108 & 395 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
  CAS-BOT-BC412705  Hollisteria lanata Herbert Mason 1940-5-4 12266 Merced Ortigalita Canyon, 2 miles north east of Ortigalita Peak 304 Comment
  UC912326  Holocarpha virgata subsp. virgata Herbert L. Mason 1929-9-21 5431 Contra Costa 3 mi above Clayton (summit of grade, Marsh Creek Road) Comment
  UC912268  Holocarpha virgata subsp. virgata Herbert L. Mason 1929-10-4 5449 Placer 3 mi s of Roseville; Folsom Road Comment
  CHSC2153  Hordeum jubatum P. Mason 1937-5-23 Glenn On canal bank at Ord Bend. 39 Comment
  POM313215  Hordeum jubatum H. L. Mason 1947-8-9 13478 Modoc East side of Fairchild Swamp, north of Alturas Comment
  UC1152953  Hordeum jubatum Herbert L. Mason 1963-6-24 15217 Mono Paoha Island Mono Lake Comment
  UC673309  Horkelia bolanderi Herbert L. Mason 1934-5-5 8127 Lake between Kelseyville Lower Lake (Foot of obsidian covered hill just above a meadow) Comment
  UC555626  Horkelia daucifolia H. L. Mason 1931-5-9 5870 Siskiyou 3 mi s Weed Comment
  UC555283 Image available Horkelia marinensis H. L. Mason 1929-9-1 5406 Mendocino 3 mi n Fort Bragg Comment
  CAS-BOT-BC144069  Horkelia parryi H. L. Mason 1932-4-24 6978 Amador Three miles south of Ione Comment
  GH345641  Horkelia parryi H. L. Mason 1932-4-24 6978 Unknown Three miles south of Ione Comment
  UC555628  Horkelia parryi H. L. Mason 1932-4-24 6978 Amador 3 mi s Ione Comment
  UC565576  Hulsea heterochroma H. L. Mason 1923-7-21 635 Tuolumne Hetch Hetchy; Yosemite National Park Comment
  UC581126  Hulsea heterochroma H. L. Mason 8152 Monterey Headwaters of Arroyo Seco; Santa Lucia Mountains Comment
  UC1101445  Hydrocotyle ranunculoides Herbert L. Mason and Verne Grant 1946-7-24 12917 Marin first lake s. Bear Valley (2.8 mi. n. of Lake Ranch) Comment
  UC965569  Hydrophyllum capitatum var. alpinum Herbert L. Mason 1952-7-11 14338 Nevada 1 mi w Univ. of Calif. Trout Laboratory (Sage Hen Creek); Sierra Nevada, Sage Hen Creek 1981 Comment
  CAS-BOT-BC410235  Hypericum concinnum H. L. Mason 1930-6-1 5676 Lake St. Helena Creek, slopes of Mount St. Helena Comment
  JEPS812  Ipomopsis aggregata Herbert L. Mason 1924-6-15 1035 Plumas Blairsden Feather River (near the junction of Graeagle creek and the Feather River) Comment
  UC571179  Iris douglasiana H. L. Mason 1928-4-8 4282 Sonoma Fort Ross Comment
  UC571175  Iris macrosiphon H. L. Mason 1926-3-6 2685 Marin near Lake Lagunitas Comment
  UC571182  Iris macrosiphon H. L. Mason 1930-6-1 5675 Lake St. Helena Creek Mount St. Helena (slopes of Mount St. Helena) Comment
  UC571184  Iris macrosiphon H. L. Mason 1926-5-29 3280 Nevada 5 mi s Grass Valley; Rattlesnake Creek 609 Comment
  JEPS19119  Isocoma menziesii var. sedoides Herbert L. Mason 1927-9-24 4086 Santa Barbara West ranch Buena Vista Creek; Santa Cruz Island Comment
  UC907509  Isoetes howellii Herbert L. Mason June 1950 Sacramento just above n end of Antioch Bridge (San Joaquin River) Comment
  CAS-BOT-BC112401  Isolepis carinata Herbert L. Mason 1946-5-19 12783 Mendocino Cleone Lake, north of Fort Bragg Comment
  CAS-BOT-BC112628  Isolepis cernua H. L. Mason 1921-6-2 s.n. San Mateo Pebble Beach, near Pescadero. Comment
  UC1100789  Isolepis cernua Herbert L. Mason 1946-5-19 12780 Mendocino n Ft. Bragg (Cleone Lake); , n of Ft. Bragg Comment
  UC634683  Isomeris arborea H. L. Mason 1926-4-28 3081 San Bernardino Box S Ranch Spring Comment
  UCD133357  Iva axillaris Herbert L. Mason 1947-7-10 13344 Modoc Dorris Reservoir, 2 miles east of Alturas. Comment
  CAS-BOT-BC140232  Ivesia santolinoides Herbert L. Mason 1938-7-28 12039 Tuolumne Macomb Ridge east of Tilden Lake; Sierra Nevada, Yosemite National Park 3048 Comment
  UC673316  Ivesia santolinoides Herbert L. Mason 1933-9-2 7264 Amador Silver Lake; Sierra Nevada Comment
  UC1081565  Ivesia unguiculata Herbert L. Mason 1936-7-12 11242 Mariposa Peregoy Meadow; Sierra Nevada, Yosemite National Park, Glacier Point 2255 Comment
  SEINET12323656  Jacaranda mimosifolia E. Mason, Mason, R. E. 1944-1 s.n. Los Angeles near Los Angeles Comment
  UC1179033  Juncus acuminatus Herbert L. Mason 1929-8-24 5395 Mendocino Pudding Slough Creek Fort Bragg Comment
  UC1100953  Juncus balticus Herbert L. Mason 1948-7-18 13615 Siskiyou Grass Lake Comment
  UC1100959  Juncus balticus Herbert L. Mason and Verne Grant 1947-6-26 13248 Solano Cordelia Slough Suisun Marsh Comment
  UC1100975  Juncus balticus Herbert L. Mason and Verne Grant 1947-7-9 13318 Modoc Cedar Pass, summit of Warner Range Warner Range 1920 Comment
  UC1101043  Juncus bufonius var. congestus Herbert L. Mason 1949-7-7 14030 San Mateo Mouth of Gazos Creek Comment
  UC1179055  Juncus chlorocephalus Herbert L. Mason 1938-7-26 12015 Tuolumne Andrews Peak Sierra Nevada, Yosemite National Park 2590 Comment
  UC1179036  Juncus effusus subsp. pacificus Herbert L. Mason 1932-7-24 7114 Marin Inverness Ridge Comment
  UC1101029  Juncus hesperius Herbert L. Mason and Verne Grant 1946-8-28 13088 San Mateo s of San Francisco (on Santa Cruz-Daly City Road #5) Comment
  SEINET6186011  Juncus howellii H. L. Mason 1952-7-16 14349 Nevada Sierra Nevada, Sage Hen Creek, adjacent to stream which arises from large spring in meadow one mile west of University of California Trout Laboratory 1981 Comment
  UC1101010  Juncus lescurii Herbert L. Mason 1946-6-9 12874 San Luis Obispo between Oceano and mouth of Santa Maria River; Dune Lakes Comment
  UC1056961  Juncus macrandrus Herbert L. Mason 1936-7-9 11896 Tuolumne w of Hetch Hetchy; Sierra Nevada, Yosemite National Park, Swamp Lake 1584 Comment
Read comments
Jul 13 2007
  UC1056962  Juncus macrandrus Herbert L. Mason 1938-7-9 11891 Tuolumne w of Hetch Hetchy; Sierra Nevada, Yosemite National Park, Swamp Lake 1584 Comment
  UC1100956  Juncus mexicanus Herbert L. Mason and Verne Grant 1947-7-12 13426 Modoc n of Likely (s loop of w side road) Comment
  UC965655  Juncus mexicanus Herbert L. Mason 1952-7-19 14436 Nevada opposite University of California Trout Laboratory; Sierra Nevada, Sage Hen Creek 1981 Comment
  UC1100996  Juncus nevadensis Herbert L. Mason and Verne Grant 1947-7-10 13357 Modoc 0.25 mi w Dorris Reservoir (2 mi e of Alturas) Comment
  POM312896  Juncus phaeocephalus var. paniculatus H. L. Mason, Verne Grant 1946-7-5 12911 Solano In Lake Chabot water reservoir just north of Vallejo. Comment
  YM-YOSE66522  Juniperus occidentalis H. L. Mason 1938-7-7 11876 Tuolumne SWAMP LAKE RESEARCH RESERVE. RIDGE EAST OF SWAMP LAKE Comment
  A362728  Kalmia microphylla H. L. Mason 1938-7-6 11852 Unknown Sierra Nevada, Swamp Lake, Yosemite National Park Comment
  GH365654  Keckiella antirrhinoides H. L. Mason 1926-4-30 3142 Unknown Pala Grade Comment
  UC1178984  Keckiella lemmonii Herbert L. Mason 1945-6-28 12603 Lake se of Borax Lake; Obsidian Ridge Comment
  UC1039508  Kelloggia galioides Herbert L. Mason 1923-7-17 600 Tuolumne Mather 1432 Comment
  UC1039511  Kelloggia galioides H. L. Mason 1926-5-31 3356 Calaveras 1.2 mi sw Calaveras Big Trees (on old road) Comment
  UC775178  Kelloggia galioides Herbert L. Mason Jul 1941 12523 Madera Ottoway Lake; Yosemite National Park Comment
  UC1191873  Kickxia spuria Herbert L. Mason and S. Galen Smith 1948-8-19 8365 Merced about 2 mi ne Merced (on Snelling highway) Comment
  GH360099  Koeleria cristata H. L. Mason 1932-4-28 7051 Unknown Laundry farm, Oakland Hills Comment
  UC1076311  Kopsiopsis strobilacea Herbert L. Mason 1927-6-15 3773 San Bernardino Mt. San Antonio, San Gabriel Mts. Comment
  SEINET7881865 Image available Lactuca pulchella Herbert L. Mason 1940-1 12316 Tuolumne Miguel Meadows; Yosemite National Park 1585 Comment
  CAS-BOT-BC349852  Lactuca tatarica subsp. pulchella Herbert L. Mason 1940-7-6 12316 Tuolumne Yosemite National Park. Miguel Meadows 1584 Comment
  CAS-BOT-BC349853  Lactuca tatarica subsp. pulchella Herbert L. Mason 1940-7-6 12316 Tuolumne Yosemite National Park. Miguel Meadows 1584 Comment
  UC964729  Lactuca tatarica subsp. pulchella Herbert L. Mason 1940-7-6 12316 Tuolumne Miguel Meadows 1584 Comment
  UC912318  Laennecia coulteri Herbert L. Mason 1929-9-21 5443 Contra Costa one mile e of junction of Bordon Highway and road to Antioch; Antioch, Borden Highway Comment
  UC1051477  Langloisia setosissima subsp. punctata Herbert L. Mason 1952-4-11 14258 San Bernardino black lavas n. Pisgah Crater Comment
  UC909089  Langloisia setosissima subsp. setosissima Herbert L. Mason 1928-3-10 4204 Riverside Hidden Springs Canyon Coachella Mts., Hidden Springs Canyon Comment
  UC571110  Larrea tridentata Herbert L. Mason 1926-4-26 3007 Los Angeles Little Rock Creek; Mojave Desert Comment
  CAS-BOT-BC412762  Lastarriaea coriacea H. L. Mason 1923-6-23 545 Monterey Carmel River, ten miles above Carmel Comment
  CAS-BOT-BC337968  Lasthenia californica H. L. Mason 1921-5-14 s.n. Alameda Haywards [Hayward] Comment
  UC769987  Lasthenia fremontii Herbert L. Mason 1934-3-25 7970 Sacramento Keithly Ranch Sacramento Valley, Rio Linda Comment
  UC1076391  Lathyrus lanszwertii var. lanszwertii Herbert L. Mason 1925-7-4 2142 Tuolumne Mather Sierra Nevada 1432 Comment
  UC673610  Lathyrus littoralis Herbert L. Mason 1926-4-18 2863 San Francisco San Francisco Comment
  UC912574  Layia chrysanthemoides Herbert L. Mason 1929-3-31 5151 Contra Costa Sacramento River at Antioch; Sacramento River Comment
  CAS-BOT-BC321071  Layia gaillardioides H. L. Mason 1921-7-14 s.n. San Mateo La Honda-Pescadero Road, near Pescadero Creek Comment
  CAS-BOT-BC321072  Layia gaillardioides H. L. Mason 1921-7-14 s.n. San Mateo La Honda-Pescadero Road, near Pescadero Creek Comment
  UC912563  Layia glandulosa Herbert L. Mason 1926-4-26 3000 Los Angeles Little Rock Comment
  UC912595  Layia glandulosa Herbert L. Mason 1926-4-27 3042 Los Angeles Little Rock Creek Comment
  UC912610  Layia glandulosa Herbert L. Mason 1932-4-2 6900 Kern 3 mi w Muroc; Mojave Desert Comment
  UC912576  Layia pentachaeta subsp. pentachaeta Herbert L. Mason 1929-4-7 5183 Stanislaus about 10 mi above Oakdale; Sierra foothills Comment
  UC912277  Layia septentrionalis Herbert L. Mason 1929-4-29 5235 Lake 2.9 mi w Lakeport Comment
Read comments
Jan 3 2018
  POM224203  Lembertia congdonii H. L. Mason 1935-4-30 9315 Kern 5 miles W of Bakersfield Comment
  UC1101275  Lemna minuscula Herbert L. Mason, S. Galen Smith 1948-8-11 8326 Merced 5 mi w of Merced (Black Rascal Creek); Black Rascal Creek Comment
  UC1106909  Lemna minuscula Herbert L. Mason 1937-6-17 11545 Alameda Thornhill pool, on road to Moraga, Oakland Oakland; , Thornhill pool Comment
  CAS-BOT-BC527312  Lemna trisulca Herbert L. Mason 1955-7-30 14638 Plumas Near Chester Comment
  UC1101260  Lemna trisulca Herbert L. Mason 1955-7-30 14638 Plumas near Chester Comment
  UC632850  Lepechinia calycina H. L. Mason 1936-5-15 Mariposa Seven miles above Coulterville Comment
  UC1076211  Lepidium fremontii H. L. Mason 1930-4-20 5592 Los Angeles Rock Creek Region Mohave Desert Comment
  UC673528  Lepidium fremontii H. L. Mason 1926-4-27 3056 Los Angeles 30 mi w Victorville; Mohave Desert Comment
  UC673532  Lepidium latipes var. latipes H. L. Mason 1932-4-17 6955 Santa Clara plains s.w. Gilroy (Miller & Lux Ranch); Miller & Lux Ranch Comment
  UC1076212  Lepidium perfoliatum H. L. Mason 1932-4-1 6861 Los Angeles 1 mi. e. Lancaster (Mohave Desert); 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
  CAS-BOT-BC273950  Leptochloa fusca subsp. fascicularis Herbert L. Mason 1945-9-19 12730 Butte Gray Lodge Game Refuge, northwest of Pennington Comment
  CAS-BOT-BC273955  Leptochloa fusca subsp. fascicularis Herbert L. Mason 1945-9-19 12730 Butte Gray Lodge Game Refuge, northwest of Pennington Comment
  UC908540  Leptodactylon californicum Herbert L. Mason 1935-5-25 8318 San Luis Obispo Cuyama River n Santa Maria; Cuyama River Comment
  GH385305  Leptodactylon californicum subsp. tomentosum H. L. Mason 1941-3-28 12402 Unknown north end of Nipomo mesa 76 Comment
  SEINET4854777  Leptodactylon californicum subsp. tomentosum Herbert L. Mason 1941-3-28 12402 San Luis Obispo North end of Nipomo Mesa. 76 Comment
  UC1186146  Leptodactylon pungens Herbert L. Mason 1938-7-25 11999 Tuolumne Deep Lake at e base Mahan Peak (Yosemite National Park); , Deep lake e base Mahan Peak Comment
  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-BC226553  Leptosiphon acicularis Herbert L. Mason 1933-4-30 7218 Lake Middletown Comment
  CAS-BOT-BC226589  Leptosiphon ambiguus Herbert L. Mason 1926-4-11 2825 Alameda Rancho Repose, Mount Hamilton Range, Cedar Mountain Comment
  POM310911  Leptosiphon aureus H. L. Mason 1935-4-30 8348 Kern West side of Walker Pass near Summit. Comment
  CHSC40737  Leptosiphon grandiflorus H. L. Mason 1940-5-5 12275 Merced Los Banos Creek. Comment
  POM310915  Leptosiphon grandiflorus H. L. Mason 1940-5-5 12275 Madera Los Banos Creek Comment
  CAS-BOT-BC226704  Leptosiphon jepsonii Herbert L. Mason 1928-4-13 4339 Sonoma Reibli School Comment
  RSA114063  Leptosiphon liniflorus H. L. Mason 1952-4-14 14265 Contra Costa 3.5 miles S of Byron Comment
  POM264403  Leptosiphon montanus H. L. Mason 1935-4-30 6262 Kern Below Hobo Hot Springs, lower Kern River Canyon Comment
  GH385242  Leptosiphon pygmaeus H. L. Mason 1935-5-4 8300 Unknown southwest facing slopes of Mount Hamilton, Mount Hamilton Range Comment
  SFV16204  Leptosyne calliopsidea S. Mason, J. Artero 1995-4-1 50 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
  UC912538  Lessingia leptoclada H. L. Mason 1925-7-29 2183 Tuolumne Hog Ranch Mather 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
  UC912255  Lessingia ramulosa Herbert L. Mason 1928-7-20 4912 Lake s Kelseyville Comment
  UC642674  Lewisia glandulosa H. L. Mason 1936-7-23 11283 Tuolumne alpine slopes of Mount Conness Sierra Nevada, Mount Conness Comment
  UC1093947  Lewisia kelloggii subsp. kelloggii Herbert L. Mason 1941-7-6 12495 Mariposa Horse Ridge Yosemite National Park 2895 Comment
  CAS-BOT-BC444533  Lewisia triphylla Herbert L. Mason 1936-8-6 11512 Mariposa Sierra Nevada, Yosemite National Park. Peregoy Meadow, Glacier Point road 2255 Comment
  UC1099788  Lewisia triphylla Herbert L. Mason Jul 7 1939-Jul 8 1939 12154 Nevada 3 mi w Donner Summit 2072 Comment
  UC1100166  Lilaea scilloides Herbert L. Mason 1925-6-25 2109 Tuolumne Mather Comment
  CAS-BOT-BC451673  Lilaea scilloides H. L. Mason 1922-3-28 s.n. San Mateo Pigeon Pt. Comment
  UC1100169  Lilaea scilloides Herbert L. Mason 1948-6-10 13575 Mendocino 3 mi s Gualala (Highway 1) Comment
  UC1111016  Lilaeopsis masonii Herbert L. Mason October, 1942 12556 Contra Costa Antioch, Lower San Joaquin R. Comment
  UC566870  Lilaeopsis occidentalis H. L. Mason 1929-8-24 5402 Mendocino Fort Bragg, Pudding Creek Slough Comment
  UC673407  Lilium maritimum Herbert L. Mason Aug 1930 5739 Mendocino Fort Bragg Comment
  CAS-BOT-BC130792  Lilium pardalinum H. L. Mason 1920-6-25 s.n. San Mateo Pescadero Creek Comment
  UC673374  Lilium pardalinum H. L. Mason 1922-7-19 314 Tuolumne Mather Sierra Nevada Mountains, Yosemite National Park (Lodge Meadow) 1432 Comment
  UC673399  Lilium parvum Herbert L. Mason 1925-6-29 2135 Tuolumne Lake Eleanor; Sierra Nevada, Yosemite National Park 1432 Comment
  UC673376  Lilium parvum H. L. Mason 1922-7-24 321 Tulare Middlefork Bridge Sierra Nevada Mountains, Yosemite National Park (Tioga Road) 1737 Comment
Read comments
Feb 25 2011
  UC1077087  Limnanthes alba Herbert L. Mason 1938-7-11 11940 Tuolumne w Hetch Hetchy (margin of lake at gravel pit); Yosemite National Park, Miguel Meadow 1584 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
  UC971801  Limnanthes alba subsp. alba Charles T. Mason Jr. 1948-5-13 1184 Sacramento 6 mi e Sacramento (ditch on s side of State Hwy 16) 30 Comment
  UC971834  Limnanthes alba subsp. alba Charles T. Mason Jr. 1949-4-23 1252 Butte 7 mi s Oroville (in ditch along e side of State Hwy 24) Comment
  UC1178824  Limnanthes alba subsp. versicolor Herbert L. Mason 1939-7-13 12135 Tuolumne woods around Miguel Meadows (w of Hetch Hetchy); Sierra Nevada, Yosemite National Park 1584 Comment
  UC635636  Limnanthes alba subsp. versicolor H. L. Mason 1924-5-29 1025 Tuolumne Hog Ranch Sierra Nevada Mountains, Yosemite National Park, Mather (in stream bed) Comment
  SEINET6670265  Limnanthes alba var. alba C. T. Mason 1949-4-23 1252 Butte 7 miles south of Oroville, along the east side of State Highway 24 Comment
  SEINET6670327  Limnanthes alba var. versicolor C. T. Mason 1949-5-9 1293 El Dorado 3.3 miles south of Eldorado, along State Highway 49 Comment
  HSC2203  Limnanthes douglasii H. L. Mason, Annatta Carter 1938-5-18 1413 Marin Point Reyes Peninsula, 12 mi. from Inverness Comment
  UC971872  Limnanthes douglasii Charles T. Mason Jr. 1948-4-24 1140 San Joaquin about 10 mi ne Stockton (ditch on nw side of Hwy 88) Comment
  SEINET8727025 Image available Limnanthes douglasii Charles T. Mason Jr. 1948-1 1160 San Joaquin Along state Highway 4 about 1/8 mile west of cross-road to Milton and Knights Ferry, Elevation 200 feet. 61 Comment
  UC635632  Limnanthes douglasii subsp. douglasii H. L. Mason 1928-4-13 4310 Marin marshy meadow n San Rafael (near sloughs) Comment
  UC971874  Limnanthes douglasii subsp. douglasii Charles T. Mason Jr. 1948-5-8 1182 Napa Pope Valley Comment
  UC971838  Limnanthes douglasii subsp. nivea Herbert L. Mason 1941-4-5 Lake Borax Lake Comment
  UC971843  Limnanthes douglasii subsp. nivea Charles T. Mason Jr. 1948-5-8 1177 Mendocino about 8 mi n Ukiah (along US Hwy 101) 457 Comment
  UC971800  Limnanthes douglasii subsp. nivea Charles T. Mason Jr. 1948-3-5 1115 Santa Clara reservoir Hall's Valley (overflow creek at s end) 487 Comment
  UC971816  Limnanthes douglasii subsp. rosea Charles T. Mason Jr. 1948-3-14 1132 Amador along state hwy 88 between Ione and Clements 106 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
  UC971822  Limnanthes douglasii subsp. rosea Charles T. Mason Jr. 1948-4-25 1160 Stanislaus along State Hwy 4 about 1/8 mi w cross road to Milton and Knights Ferry 60 Comment
  RSA435687  Limnanthes douglasii subsp. rosea Charles T. Mason Jr. 1949-3-31 1248 Merced Along the road from Merced to Snelling, 6 miles from U.S. Highway 99. Comment
  UC971828  Limnanthes douglasii subsp. sulphurea Herbert L. Mason 1941-5-23 Marin Point Reyes Peninsula Comment
  UC971797  Limnanthes floccosa subsp. californica Charles T. Mason Jr. 1949-4-24 1256 Butte 9 mi nw Oroville (on n side of 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
  UC971891  Limnanthes montana Charles T. Mason Jr. 1948-5-2 1173 Fresno Big Sandy Valley Black Mountain (e side of mt., 4.2 mi from junction of Hwy 168 and road to Aubrey) 579 Comment
  UC971895  Limnanthes montana Charles T. Mason Jr. 1949-5-9 1290 Madera 0.3 mi s Mariposa-Madera county line (n of Raymond) Comment
  SEINET6670657  Limnanthes montana C. T. Mason 1949-5-9 1287 Mariposa 2 miles south of Mormon Bar, road from Mormon Bar to Raymond Comment
  UC971867  Limnanthes striata Charles T. Mason Jr. 1949-5-9 1292 Tuolumne 1.3 mi w Chinese Camp (ditch on s side of State Hwy 120) Comment
Read comments
Oct 25 2009
  UC971907  Limnanthes striata Charles T. Mason Jr. 1949-5-9 1285 Tuolumne 2 mi se Keystone (Keystone-La Grange rd, along a stream) Comment
  UC971863  Limnanthes striata Charles T. Mason Jr. 1949-5-9 1296 Placer 4 mi ne Shingle Springs (on U.S. Hwy 50 at railroad crossing) 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
  UC1101428  Limosella acaulis Herbert L. Mason 1952-5-18 14293 Merced Santa Fe Grade e Los Banos Comment
  UC965644  Limosella aquatica Herbert L. Mason 1952-7-19 14452 a Sierra at junction of Calpine with Sierraville-Beckwourth road 1.5 mi e Calpine (Sierra Valley); Sierra Nevada, Sierra Valley 1524 Comment
  UC965646  Limosella aquatica Herbert L. Mason 1952-7-17 14387 Sierra at junction of Calpine with Sierraville-Beckwourth road 1.5 mi e Calpine (Sierra Valley); Sierra Nevada, Sierra Valley 1524 Comment
  UC908556  Linanthus ambiguus Herbert L. Mason 1928-5-6 4567 Alameda Cedar Mountain Mount Hamilton Range Comment
  UC908561  Linanthus ambiguus Herbert L. Mason 1932-4-17 6950 Santa Clara road to Sweedal, headwaters of Uvas Creek Uvas Creek 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
  UC908655  Linanthus arenicola Herbert L. Mason 1938-4-15 11726 San Bernardino sw of Trona; Poison Canyon Comment
  SEINET8729329 Image available Linanthus aureus Herbert L. Mason 1935-1 8348 Kern West side of Walker Pass near summit. Comment
  UC908646  Linanthus aureus subsp. aureus Herbert L. Mason 1926-4-26 2945 Los Angeles Pacoima Wash, foothills of San Gabriel Mountains San Gabriel Mountains Comment
  UC907833  Linanthus bicolor Herbert L. Mason 1934-3-28 8005 Kern 31 mi w Onyx (lower Kern River Canyon); Kern River Canyon Comment
  UC907842  Linanthus bicolor Herbert L. Mason 1943-4-16 12569 Sonoma about 10 mi above Sonoma Comment
  UC907851  Linanthus bicolor Herbert L. Mason 1934-3-28 8007 Kern 25 mi w Onyx (lower Kern River Canyon); Kern River Canyon Comment
  UC908668  Linanthus bicolor Herbert L. Mason 1928-5-3 4461 Amador w of Ione (Jackson Creek Bridge) Comment
  UC908558  Linanthus bicolor Herbert L. Mason 1943-4-15 12562 Santa Clara w side Pacheco Pass (border of Santa Clara and Merced Counties) Comment
  UC964796  Linanthus bolanderi Herbert L. Mason 1938-5-1 11748 Lake about 4 mi from Lucerne; Bartlett Mountain 1158 Comment
  SEINET8729333 Image available Linanthus bolanderi Herbert L. Mason 1938-1 11748 Lake Bartlett Mountain, about 4 miles from Lucerne. Comment
  UC907827  Linanthus ciliatus Herbert L. Mason 1941-7-7 12497 Madera Buck Camp Comment
  UC908356  Linanthus ciliatus H. L. Mason 1935-5-9 Stanislaus Arroyo del Puerto Mount Hamilton Range, Red Mountains Comment
  UC963788  Linanthus ciliatus Herbert L. Mason 1927-6-11 3747 Los Angeles Mount Wilson San Gabriel Mountains 1524 Comment
  UC908282  Linanthus ciliatus Herbert L. Mason 1924-6-20 1082 Plumas between Gold Lake and Bear Lake (Graeagle Camp) Comment
  SD45375  Linanthus concinnus Herbert L. Mason 1934-3-30 8035 Los Angeles Rock creek; south of Valyermo, north side of San Gabriel Mountains. Comment
  UC963792  Linanthus dianthiflorus Herbert L. Mason 1928-3-11 4256 Riverside San Gorgonio Pass Comment
  SEINET196202  Linanthus dichotomus Herbert L. Mason 1926-4-11 2826 Alameda Cedar Mountain, Mount Hamilton Range. Comment
  POM310952  Linanthus dichotomus subsp. meridianus H. L. Mason 1942-5-24 12540 Napa Eight miles south of Pope Valley Store Comment
  SEINET8729335 Image available Linanthus dichotomus subsp. meridianus Herbert L. Mason 1942-1 12540 Napa Eight miles south of Pope Valley Store Comment
  UC907873  Linanthus filipes Herbert L. Mason 1929-3-24 5104 Madera 18 mi e Madera (at junction of Yosemite Road, between Bates Station and O'Neals) Comment
  GH385227  Linanthus grandiflorus H. L. Mason 1940-5-5 12275 Unknown Los Banos Creek Comment
  JEPS58436  Linanthus harknessii Herbert L. Mason 1924-6-20 1084 Plumas between Gold Lake Bear Lake Comment
  UC908664  Linanthus jepsonii Herbert L. Mason 1940-5-21 12293 Sonoma Head of Maycama Creek Knights Valley Comment
  UC908037  Linanthus jonesii Herbert L. Mason 1935-3-29 8230 San Bernardino w of Searles Lakes; Mohave Desert, Poison Canyon Comment
  UC1060674  Linanthus liniflorus Herbert L. Mason 1957-5-11 14699 San Benito 2-3 mi e Hernandez Comment
Read comments
Apr 14 2020
  UC907996  Linanthus liniflorus Herbert L. Mason 1935-5-1 8366 Tulare n of Kernville; Sequoia National Forest, Kern River Comment
  UC665602  Linanthus montanus Herbert L. Mason 1935-4-30 6262 Kern below Hobo Hot Springs (lower Kern River Canyon); Sierra Nevada, Kern River Canyon Comment
  UC963779  Linanthus montanus Herbert L. Mason 1928-5-3 4483 Amador s of Cosumnes River (opposite Clark Creek) Comment
  UC907957  Linanthus parryae Herbert L. Mason 1935-4-30 6271 Kern Onyx Comment
  UC907864  Linanthus parviflorus Herbert L. Mason 1938-5-8 11793 Santa Barbara road to Figueroa Mountain Comment
  UC907984  Linanthus parviflorus Herbert L. Mason 1926-6-6 3380 Santa Cruz just below Woodwardia Falls; Big Basin Comment
  UC1191147  Linanthus parviflorus Herbert L. Mason 1928-5-3 4482 Amador s of Cosumnes River (opposite Clark Creek) Comment
  UC1178837  Linanthus pygmaeus Herbert L. Mason 1940-5-3 12261 Merced 2 mi ne Ortigalita Peak; South Coast Ranges, Ortigalita Canyon 304 Comment
  UCD123916  Lindernia dubia Herbert L. Mason; S. Galen Smith 1948-8-18 8351 Kings canal just west of Stratford. Comment
  UC632771  Lipocarpha micrantha H. L. Mason 1938-7-10 11905 Tuolumne w of Hetch Hetchy (Yosemite National Park, Miguel Meadow); Yosemite National Park Yosemite National Park Yosemite Natio 1584 Comment
  CAS-BOT-BC111996  Lipocarpha occidentalis H. L. Mason 1938-7-10 11904 Tuolumne Miguel Meadow, west of Hetch-Hetchy. Yosemite National Park. 1584 Comment
  UC632775  Lipocarpha occidentalis H. L. Mason 1936-7-12 11216 Mariposa along Merced River, Yosemite National Park, Yosemite Valley Merced River; Yosemite National Park, Yosemite Valley, Merced River Comment
  UC635726  Lipocarpha occidentalis Herbert L. Mason 1937-7-21 11557 Tuolumne Yosemite National Park, Miguel Meadows Miguel Meadows; Yosemite National Park, Miguel Meadows 1645 Comment
  SEINET7585735 Image available Lipocarpha occidentalis H. L. Mason 1938-7-10 11904 Tuolumne Yosemite National Park, Miguel Meadow, west of Hetch-Hetchy. 1585 Comment
  UC673589  Listera convallarioides H. L. Mason July, 1930 5709 Calaveras near Hermit Springs; Blue Creek, tributary of North Fork of Mokelumne River Comment
  UC673590  Listera convallarioides H. L. Mason 1925-7-30 2190 Tuolumne ne Mather (along Smith Peak Trail) Comment
  UC1076088  Lithocarpus densiflorus Herbert L. Mason 1928-7-14 4899 Humboldt East Fork of Eel River East Fork of Eel River, Gaberville; Gaberville Comment
  UC570877  Lithophragma Herbert L. Mason 1926-5-29 3294 Nevada 3 mi w Cisco; Crystal Lake 1767 Comment
  UC1076022  Lithophragma campanulatum Herbert L. Mason 1947-5-17 14757 Siskiyou on Scott Mountain Road five mi s Callahan; s of Callahan Comment
  JEPS19296  Lithophragma campanulatum Herbert L. Mason 1947-5-17 14757 Siskiyou along the Scott Mountain Road about 5 mi s Callahan 1463 Comment
  UC570868  Lithophragma heterophyllum Herbert L. Mason 1927-4-23 3684 San Mateo along road between La Honda and Pescadero Creek; road between La Honda and Pescadero Creek Comment
  UC909081  Loeseliastrum matthewsii Herbert L. Mason 1926-4-27 3058 Los Angeles 30 mi. w. Victorville; Mojave Desert Comment
  UC909130  Loeseliastrum matthewsii Herbert L. Mason 1935-4-30 8295 Kern near Inyokern; Owens Valley Comment
  UC909131  Loeseliastrum matthewsii Herbert L. Mason 1926-4-27 3071 San Bernardino n. Victorville Comment
  UC909135  Loeseliastrum matthewsii Herbert L. Mason 1926-4-28 3089 San Bernardino s.e. Lucerne Valley P.O. (Box S Ranch); Box S Ranch Comment
  UC709734  Loeseliastrum schottii Herbert L. Mason 1926-4-28 3099 San Bernardino Mohave Desert, Box S Ranch Comment
  UC581143  Logfia depressa H. L. Mason 1935-3-29 8213 Kern Red Rock Canyon Mojave Desert, Red Rock Canyon Comment
  UC581174  Logfia depressa H. L. Mason 1935-3-29 8235 San Bernardino six mi s Trona (w side of lake); Mohave Desert, Searles Lake Comment
  SEINET190349 Image available Logfia filaginoides H. L. Mason 1932-1 7055 Alameda Oakland Hills; Laundry Farm Comment
  UC581118  Logfia filaginoides H. L. Mason 1935-3-31 8256 Fresno ne of Fresno (Kett) Comment
  UC673619  Logfia filaginoides H. L. Mason 1932-5-4 7055 Alameda Laundry Farm Oakland Hills, Laundry Farm Comment
  UC673621  Logfia filaginoides Herbert L. Mason 1933-4-22 7215 Monterey Pajaro Hills Comment
  UC1093862  Logfia gallica Herbert L. Mason 1947-5-4 13210 Sonoma near Kenwood; Hood Mountain Comment
  UC672274  Logfia gallica H. L. Mason 1933-4-22 7216 Monterey Pajaro Hills Comment
  UC1178993  Lomatium hooveri Herbert L. Mason 1947-3-30 13164 a Colusa 0.5 mi E of Lake Co. line on Williams-Lower Lake Highway western Colusa Co. Comment
  UC775191  Lomatium macrocarpum Herbert L. Mason 1940-5-4 12270 a Merced n.w. Ortigalita Peak (Piedra Azul Creek); Inner South Coast Ranges, Piedra Azul Creek 304 Comment
  UC566806  Lomatium nudicaule Herbert L. Mason 1927-5-11 3726 Butte vicinity of Dobbins 457 Comment
  JEPS17023  Lomatium parvifolium Herbert L. Mason 1927-7-30 3992 Monterey Carmel Comment
  UC566819  Lomatium parvifolium H. L. Mason 1928-4-20 Monterey Carmel, Pine Woods 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
  UC753539  Lomatium utriculatum Herbert L. Mason 1946-6-7 12832 Santa Barbara 0.5 mi. above Cameusa Creek rd. to Oso Gate (San Rafael Range); San Rafael Range 731 Comment
  UC566815  Lomatium utriculatum H. L. Mason 1926-4-26 2980 Los Angeles summit Mint Canyon Comment
  UC912445  Lonicera conjugialis Herbert L. Mason 1932-9-9 7183 Alpine head Silver Creek; Ebbett's Pass Comment
  UC1076400  Lonicera interrupta Herbert L. Mason 1925-7-29 2184 Tuolumne Hog Ranch Mather Comment
  CAS-BOT-BC198557  Lotus Herbert L. Mason 1927-5-10 3711 Butte Cherokee Mine, Table Mt. northeast of Oroville Comment
  UC555427  Lotus benthamii H. L. Mason Nov 1931 5881 Monterey road between Monterey and Carmel Comment
  SEINET3696754 Image available Lotus denticulatus Herbert L. Mason 1945-5-31 Contra Costa Cashion Canyon, NW of St. Mary's College Comment
  UC1179052  Lotus grandiflorus Herbert L. Mason 1937-5-27 11554 Lake s side Mt. Konocti Comment
  UC1178840  Lotus humistratus Herbert L. Mason 1940-5-3 12253 Merced 2 mi ne Ortigalita Peak; South Coast Ranges, Ortigalita Canyon 304 Comment
  UC1191609  Lotus humistratus Herbert L. Mason and Verne Grant 1947-7-10 13332 Modoc 2 mi e Alturas; Dorris Reservoir Comment
  UC1093974  Lotus junceus Herbert L. Mason 1938-5-7 11769 Santa Barbara Burton Mesa Comment
  UC1199848  Lotus oblongifolius var. oblongifolius Herbert L. Mason 1937-7-22 11599 Tuolumne s of Miguel Meadows (just w of Hetch Hetchy Dam); Sierra Nevada, Yosemite National Park, Swamp Lakes 1584 Comment
  UC912244  Lotus oblongifolius var. oblongifolius Herbert L. Mason 1930-9-1 5906 Monterey between Watsonville and Castroville (at upper end of Elkhorn Slough); Elkhorn Slough Comment
  UC555413  Lotus strigosus H. L. Mason 1926-4-30 3115 Riverside 1 mi s Temecula; Temecula Canyon Comment
  UC1101421  Ludwigia palustris Herbert L. Mason 1945-6-29 12627 Lake Boggs Lake at base Mt. Hanna; , Boggs Lake Comment
  POM312607  Ludwigia palustris var. pacifica H. L. Mason 1946-7-4 12886 Sonoma Pitkin Marsh, between Santa Rosa and Forestville. Comment
  UC1191767  Ludwigia peploides subsp. peploides Herbert L. Mason and Verne Grant 1946-8-14 13019 Butte canal near big pond on Sacramento Outing Club; Butte Sink, Sacramento Outing Club Comment
  UC1083200  Lupinus bicolor Herbert L. Mason 1938-4-17 11736 Mariposa ridge w Mormon Bar; Sierra Nevada foothills, w of Mormon Bar 548 Comment
  UC775180  Lupinus concinnus Herbert L. Mason 1941-3-27 12396 Santa Barbara top Burton Mesa (e of Lompoc, above Pine Canyon); above Pine Canyon, top of Burton Mesa, e of Lompoc 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
  UC1081562  Lupinus lepidus var. sellulus Herbert L. Mason 1936-7-10 11185 Tuolumne se White Wolf (Lukens Lake); Sierra Nevada, Yosemite National Park, Lukens Lake 2560 Comment
  UC1076236  Lupinus microcarpus var. horizontalis H. L. Mason 1930-4-20 5561 Kern Caliente Creek; Tehachapi Mts., Caliente Creek Comment
  UC1076233  Lupinus nanus H. L. Mason 1926-5-28 3261 El Dorado Rose Springs Comment
  RSA104354  Lupinus peirsonii H. L. Mason 1926-4-27 3026 Los Angeles Rock Creek Canyon, lower Pinyon Pine belt 1296 Comment
  UC499444 Image available Lupinus peirsonii Herbert L. Mason 1926-4-27 3026 Los Angeles Rock Creek San Gabriel Mts.; Rock Creek, San Gabriel Mts. Comment
  UC1039994  Lupinus polyphyllus var. burkei Herbert L. Mason 1936-7-7 11150 Mariposa Research Reserve Hetch Hetchy Trail w Dark Hole; Sierra Nevada, Yosemite National Park, Hetch Hetchy Trail 2438 Comment
  UC1101063  Luzula comosa var. laxa Herbert L. Mason and Lawrence W. Reinecke 1937-7-22 11608 Tuolumne Yosemite National Park. Swamp Lakes, just west of Hetch Hetchy Dam and south 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
  POM312920  Luzula spicata H. L. Mason 1936-7-27 11390 Tuolumne Gaylor Lakes, Yosemite National Park. 3049 Comment
  UC1083104  Lycium andersonii Herbert L. Mason 1932-4-2 6893 Kern 3 mi w Muroc; Mojave Desert Comment
  UC1083110  Lycium andersonii Herbert L. Mason 1926-4-28 3084 San Bernardino Box S Spring Mojave Desert Comment
  UC1111565  Lycopus uniflorus Herbert L. Mason 1938-8-1 12062 Tuolumne Yosemite National Park, in Tiltill Valley, Rancheria Mountain Trail Tiltill Valley; Sierra Nevada, Yosemite National Park, Tiltill Valley 1828 Comment
  CAS-BOT-BC215682  Lycopus uniflorus Herbert L. Mason 1938-8-1 12062 Tuolumne Tiltill Valley, Rancheria Mountian Trail, Yosemite National Park, Sierra Nevada 1828 Comment
  JEPS45598  Lyonothamnus floribundus subsp. aspleniifolius Herbert L. Mason 1927-9-25 4109 Santa Barbara hills about Pelican Bay (in canyons); Santa Cruz Island Comment
  UC555520  Lyonothamnus floribundus subsp. aspleniifolius Herbert L. Mason 1937-9-25 4109 Santa Barbara hills about Pelican Bay; Santa Cruz Island Comment
  UC1191566  Lythrum californicum Herbert L. Mason, Verne Grant 1947-6-26 13263 Solano Suisun Marsh, Coredelia Slough Suisun Marsh; , Coredelia Slough Comment
  UCD102993  Lythrum californicum Herbert L. Mason; Verne Grant 1946-8-7 12977 Colusa Butte Sink. 8 miles N of Colusa. Comment
  UC912591  Madia elegans H. L. Mason 1925-6-24 2104 Tuolumne Mather Sierra Nevada Mountains, Yosemite National Park Comment
  UCD134271  Madia glomerata Herbert L. Mason 1947-8-9 13483 Modoc on east side of Fairchild Swamp, north of Alturas. Comment
  UC1191225  Malacothrix clevelandii Herbert L. Mason 1935-5-1 8372 Tulare n Kernville; Kern River, Sequoia National Forest Comment
  UC565543  Malacothrix clevelandii Herbert L. Mason 1926-5-1 3171 San Diego Palomar Mt. Comment
  UC565538  Malacothrix floccifera Herbert L. Mason 1927-7-31 4001 Santa Cruz Mt. Herman Comment
  UC565547  Malacothrix glabrata H. L. Mason 1926-4-26 3006 Los Angeles Little Rock Creek Mohave Desert Comment
  UC775185  Malacothrix incana Herbert L. Mason 1941-7-3 San Luis Obispo n mouth of the Santa Maria River; Inner South Coast Ranges, Oso Flaco Lake Comment
  UC565526  Malacothrix saxatilis Herbert L. Mason 1923-6-20 524 a Santa Barbara seacoast n Santa Barbara Comment
  JEPS36639  Malacothrix saxatilis var. arachnoidea Herbert L. Mason 1928-10-3 4986 Monterey 4 mi above Mission; Carmel River Comment
  UC565536  Malacothrix saxatilis var. arachnoidea H. L. Mason 1929-10-3 4986 Monterey 4 mi above Mission; Carmel River Comment
  UC635194  Malosma laurina H. L. Mason 1923-6-17 468 Santa Barbara Santa Barbara, Mountain Drive Comment
  GH346914  Malus fusca H. L. Mason 1932-7-21 7101 Unknown Big Lagoon Comment
  UC555510  Malus fusca H. L. Mason 1932-7-21 7101 Humboldt Big Lagoon Comment
  UC635685  Marah oregana H. L. Mason 1927-4-23 3681 San Mateo between La Honda and Pescadero Creek Comment
  UC632796  Marah watsonii H. L. Mason 1936-4-11 11064 Calaveras s Sheep Ranch; San Antonio Creek Comment
  CAS-BOT-BC71147  Marsilea Herbert L. Mason; Verne Grant 1947-7-10 13350 Modoc Dorris Reservoir, 2 miles east of Alturas Comment
  UC1099807  Marsilea Herbert L. Mason and Verne Grant 1947-7-10 13350 Modoc 2 mi e Alturas (Dorris Reservoir) Comment
  UC1093988  Marsilea vestita subsp. vestita Herbert L. Mason 1928-5-3 4443 San Joaquin 4 mi n Clements Comment
  GH257618  Meconella californica H. L. Mason 1928-2-22 4162 Unknown San Bruno Mountains Comment
  UC635442  Meconella californica H. L. Mason 1928-2-22 4162 San Mateo San Bruno Mtns Comment
  UC1178935  Meconella californica Herbert L. Mason 1953-4-2 14500 Tulare near Aukland (on Hwy 65) Comment
  UCD86260  Melica aristata H. L. Mason 1939-7-12 12130 Tuolumne Yosemite National Park, northwest of Hetch-Hetchy. Near Swamp Lake. Comment
  UC1108812  Melica bulbosa Herbert L. Mason 1936-7-31 11471 Mono e of Saddlebag Lake (Tioga Crest); Tioga Crest Comment
  UC936196  Melica californica H. L. Mason 1932-4-24 6983 Amador 3 mi s Ione Comment
  UC912653  Melica torreyana H. L. Mason 1926-5-26 3238 Alameda Niles Canyon Comment
  UC634872  Mentha X piperita H. L. Mason 1928-10-21 5008 Mendocino bogs along Pudding Creek Slough (near Fort Bragg); along Pudding Creek Slough Comment
  UC1039799  Mentha aquatica Herbert L. Mason 1929-8-24 5400 Mendocino near Fort Bragg (bog along Pudding Creek Slough); , along Pudding Creek Slough Comment
  GH400412  Mentha arvensis H. L. Mason 1942-9-7 Unknown 3 mi S. of Upper Lake 152 Comment
  UC1191788  Mentha canadensis Herbert L. Mason 1947-8-13 13524 Modoc ne side F Reservoir (n of Canby); ne side of F reservoir Comment
  UC1191898  Mentha canadensis Herbert L. Mason 1947-8-9 13484 Modoc n Alturas (e side of Fairchild Swamp); e side of Fairchild Swamp Comment
  UC634874  Mentha canadensis H. L. Mason 1929-8-24 5399 Mendocino Pudding Creek Slough near Fort Bragg; near Fort Bragg, Pudding Creek Slough Comment
  UC634880  Mentha pulegium Herbert L. Mason Oct. 1923 785 San Mateo near summit of Jasper Ridge (toward the Hermits); near summit of Jasper Ridge toward the Hermits Comment
Read comments
Sep 19 2011
  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
  UC672665  Mentzelia micrantha H. L. Mason 1928-4-29 4435 Contra Costa Mount Diablo, Sycamore Canyon Comment
  RSA114050  Mentzelia pectinata H. L. Mason 1952-4-6 14205 Kern S of Belridge, Kern County Comment
  UC672660  Mentzelia ravenii H. L. Mason 1926-4-26 2999 Los Angeles Little Rock Comment
  UC1275797  Mentzelia veatchiana H. L. Mason 1963-6-12 15206 Mono Mono Lake, Danburg Beach Comment
  CAS-BOT-BC348487  Micropus californicus var. californicus H. L. Mason 1933-4-30 7229 Lake Near Aetna Springs Comment
  SEINET197650  Micropus californicus var. californicus H. L. Mason 1938-4-14 11705 Tulare 4 mi E of Exeter Comment
  UC581122  Micropus californicus var. californicus H. L. Mason 1934-4-28 8090 Sonoma near orchard; Dohrman Creek, Jensen's Ranch Comment
  UC672238  Micropus californicus var. californicus H. L. Mason 1933-4-21 7189 Santa Clara Hendrick's Road Comment
  CAS-BOT-BC348654  Micropus californicus var. subvestitus H. L. Mason 1932-4-28 7046 Monterey Pajaro Hills Comment
  CAS-BOT-BC349247  Microseris nutans H. L. Mason 1936-7-12 11243 Mariposa Yosemite National Park. Peregoy Meadow, Glacier Point road 2255 Comment
  UC673538  Mimulus H. L. Mason 1926-4-25 2939 Orange 5 mi s Laguna Comment
  UC632786  Mimulus aurantiacus var. aurantiacus H. L. Mason 1936-4-12 11074 Amador near Lancha Plana; Mokelumne River Comment
  UC672542  Mimulus bicolor H. L. Mason 1926-6-1 3364 Calaveras near Angels Camp Comment
  UC597549  Mimulus bolanderi H. L. Mason 1935-5-9 Stanislaus near Arroyo del Puerto; Mount Hamilton Range Comment
  UC672457  Mimulus grandis H. L. Mason June 1930 5651 Sonoma mouth Gualala River Comment
  UC1111562  Mimulus laciniatus Herbert L. Mason 1938-7-25 12004 Tuolumne s base Mahan Peak (Jack Main Canyon, Deep Lake); Sierra Nevada, Yosemite National Park 2438 Comment
  UC1111561  Mimulus layneae Herbert L. Mason 1938-7-22 11964 Tuolumne n Hetch Hetchy (Vernon Lake Trail); Sierra Nevada, Yosemite National Park 2072 Comment
  UC1275792  Mimulus nanus var. mephiticus Herbert L. Mason 1963-6-24 15209 Mono Paoha Island Mono Lake Comment
  UC1191876  Mimulus pilosus Herbert L. Mason 1945-6-28 12600 Lake s Lower Lake; Excelsior Valley Comment
  UC673534  Mimulus pilosus H. L. Mason 1929-10-13 5508 Monterey river bridge at Bradley; Salinas River Comment
  CAS-BOT-BC9495  Mimulus rubellus Herbert L. Mason 1952-7-18 14403 Nevada Upstream from University of California Trout Laboratory, Sage Hen Creek 1981 Comment
  UC632782  Mimulus tilingii H. L. Mason 1936-7-7 11159 Mariposa Hetch-Hetchy Trail w Dark Hole; Yosemite National Park, Research Reserve 2438 Comment
  UC672533  Mimulus torreyi H. L. Mason 1923-7-14 594 Tuolumne Mather Comment
  UC672527  Mimulus tricolor H. L. Mason 1934-5-5 8121 Lake sw Mt. Konocti Comment
  UC1178899  Minuartia californica Herbert L. Mason 1926-3-21 2756 Lake Middletown to Mt. St. Helena (via Toll House Canyon) Comment
  UC936171  Minuartia nuttallii subsp. gracilis Herbert L. Mason 1936-7-24 11320 Tuolumne White Mountain Yosemite National Park, Conness Range Comment
  POM312383  Mollugo verticillata H. L. Mason 1946-7-27 12953 Lake Clear Lake, 2-3 miles north of Lakeport. Comment
  UC1191374  Mollugo verticillata Herbert L. Mason 1946-7-27 12953 Lake 2-3 mi n of Lakeport (Clear Lake); Clear Lake Comment
  UC634863  Monardella breweri subsp. lanceolata H. L. Mason 1923-7-26 651 Tuolumne Hog Ranch near Mather, Sierra Nevada Mountains Comment
  SEINET4173657 Image available Monardella undulata Herbert L. Mason, Annetta M. Carter 1938-5-18 1417 Marin Point Reyes Peninsula, 12 miles from Inverness Comment
  UC1191419  Monolepis nuttalliana Herbert L. Mason and Verne Grant 1947-7-10 13339 Modoc 2 mi. e. Alturas (Dorris Reservoir); Dorris Reservoir Comment
  GH427297  Monolopia congdonii H. L. Mason 1932-4-3 6912 Unknown Five miles east of Lost Hills Comment
  JEPS35213  Monolopia major H. L. Mason 1932-3-20 Alameda plain e Mountain House (about 13 mi ne of Livermore) Comment
  NY230638  Monolopia stricta H. L. Mason 1935-5-2 9314 Kern Two miles west of Lost Hills, northwestern Kern County Comment
  UC565487  Monolopia stricta H. L. Mason 1932-4-3 6911 Kern between Blackwell's Corner and Lost Hills Comment
  UC1056305  Monoptilon bellidiforme Herbert L. Mason 1935-4-30 8297 Kern near Inyokern Comment
  UC672205  Monoptilon bellidiforme Herbert L. Mason 1920-4-28 3100 San Bernardino Box S Ranch Mojave Desert Comment
  UC1051456  Monoptilon bellioides Herbert L. Mason 1952-4-7 14210 Riverside Palm Springs Palm Canyon 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
  UC1056450  Montia chamissoi Herbert L. Mason 1936-7-12 11219 Mariposa Peregoy Meadow, Glacier Point Road, Yosemite National Park Peregoy Meadow; Sierra Nevada, Yosemite National Park, Peregoy Meadow 2255 Comment
  UC1076559  Montia fontana Herbert L. Mason 1938-7-22 11967 Tuolumne n of Hetch Hetchy (Vernon Lake Trail, Yosemite National Park); Sierra Nevada, Yosemite National Park, Vernon Lake Trail 2072 Comment
  UC1101399  Montia fontana Herbert L. Mason 1948-7-18 13625 Siskiyou Grass Lake Comment
  UC1056429  Montia fontana Herbert L. Mason 1936-3-20 11008 Tuolumne 3 mi above Tuolumne (Yosemite National Park); Sierra Nevada, Yosemite National Park Comment
  UC635320  Montia linearis H. L. Mason 1924-6-18 1052 Plumas n of Graeagle Comment
  A343914  Morella californica H. L. Mason 1928-8-25 4926 Unknown At border of deep forest and pygmy forest; mesa, one mile east of mouth of Noyo River, Noyo Comment
  UC635072  Mucronea californica Herbert L. Mason 1923-6-23 544 Monterey 10 mi above Carmel; Carmel River Comment
  POM313207  Muhlenbergia asperifolia H. L. Mason 1947-8-15 13542 Modoc Mouth of Crane Creek on Willow Ranch, east side of Goose Lake. Comment
Read comments
Aug 21 2013
  UC1106329  Muhlenbergia filiformis Herbert L. Mason, B. Fuller, and H. Whisler 1958-7-13 38 Nevada bog 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
  UC1111013  Muhlenbergia richardsonis Herbert L. Mason 1933-9-2 7268 Amador Silver Lake Comment
  UC1076195  Muilla coronata Herbert L. Mason 1938-4-15 11727 San Bernardino two mi n Kramer; Mohave Desert Comment
  UC1083343  Muilla maritima Herbert L. Mason 1926-4-26 2946 Los Angeles Pocoima Wash foothills of San Gabriel Mountains Comment
  UC1275779  Muilla transmontana Herbert L. Mason 1963-7-4 15228 Mono near Artesian Well (ne shore of lake); Mono Lake, Sulphur Springs Comment
  JEPS19557  Myosotis discolor Herbert L. Mason 1946-5-19 12777 Mendocino Cleone Lake n. of Fort Bragg; Cleone Lake Comment
  UC1076544  Myosotis discolor Herbert L. Mason 1946-5-19 12777 Mendocino Cleone Lake n. of Fort Bragg; Cleone Lake Comment
  UC1101360  Myosurus apetalus Herbert L. Mason 1953-6-16 14551 Sierra 1 mi s Beckwourth Buttes Comment
  UC1112279  Myosurus apetalus Herbert L. Mason 1952-7-11 14339 Nevada Sage Hen Creek, 1 mi w of University of California Trout Laboratory Sage Hen Creek; Sierra Nevada 1981 Comment
  CAS-BOT-BC392264  Myosurus apetalus Herbert L. Mason 1953-6-16 14554 Plumas Two miles east of Beckwourth Comment
  UC1101356  Myosurus apetalus var. montanus Herbert L. Mason 1953-6-16 14554 Plumas 2 mi e Beckwourth Comment
  CAS-BOT-BC83288  Myosurus minimus Herbert L. Mason 1952-4-14 14263 Contra Costa 3.5 miles south of Byron. Comment
  CAS-BOT-BC83293  Myosurus minimus Herbert L. Mason 1952-4-26 14269 Contra Costa 3.5 miles south of Byron. Comment
  CAS-BOT-BC83382  Myosurus minimus Herbert L. Mason 1952-4-26 14275 Stanislaus 3 miles east of the San Joaquin River, Hilmar Road near Crows Landing Road. Comment
  UC1101324  Myosurus minimus Herbert L. Mason 1953-4-2 14501 Kings about 3 mi e of Hanford 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
  UC1101340  Myosurus minimus Herbert L. Mason 1952-5-18 14294 Merced Santa Fe Grade e of Los Banos; Santa Fe Grade Comment
  UC1738081  Myosurus minimus H. L. Mason 1956-4-30 14274 B-2 Stanislaus 5 mi NE of Crows Landing (on Crows Landing Rd.) Comment
  UC1738085  Myosurus minimus H. L. Mason 1957-3-22 14268 B-6 Contra Costa 3 mi S of Byron ( on road to Herdlyn) Comment
  UC1738087  Myosurus minimus H. L. Mason 1956-5-24 14268 B-1 Contra Costa 3 mi S of Byron ( on the road to Herdlyn) Comment
  UC634958  Myosurus minimus H. L. Mason 1931-4-5 5824 Contra Costa Road between Marsh Creek and Livermore Comment
  CAS-BOT-BC83384  Myosurus minimus Herbert L. Mason 1952-5-18 14288 Stanislaus On Hilmar Road, east of the San Joaquin River about 1 mile from the junction with the Crows Landing Road. Comment
  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
  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
  UC1101359  Myosurus sessilis Herbert L. Mason 1952-3-13 14200 Contra Costa 3.3 mi s Bryon Comment
  CAS-BOT-BC101814  Myrica hartwegii Herbert L. Mason 1936-7-11 11208 Mariposa Big Creek, a tributary of the South Fork of the Merced River, near Wawona 1402 Comment
  UC1101487  Myriophyllum hippuroides Herbert L. Mason and Verne Grant 1946-8-14 13014 Butte Canal near big pond on Sacramento Outing Club, Butte Sink. Comment
  UC635570  Myriophyllum quitense H. L. Mason 1929-10-4 5466 El Dorado Lagoons, W side of Lake Tahoe above Emerald Bay, 14 mi from Tahoe City. Comment
  UC1099997  Najas guadalupensis Herbert L. Mason, S. Galen Smith 1948-8-10 8312 Merced w of South Dos Palos (border of Lyon and Hoag Ranch) Comment
  UC1099998  Najas guadalupensis Herbert L. Mason, S. Galen Smith 1948-7-30 8254 Merced about 7 mi ne of junction of Merced River and San Joaquin River Comment
  UC1100016  Najas guadalupensis Herbert L. Mason, Verne Grant 1946-8-15 13008 Colusa 2 mi w of Colusa (on Williams Highway by bridge) Comment
  POM312984  Najas guadalupensis H. L. Mason, Verne Grant 1946-8-15 13008 Colusa 2 miles west of Colusa on Williams highway by bridge 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
  UC1051484  Nama pusilla Herbert L. Mason 1952-4-11 14255 San Bernardino Black lavas n of Pisgah Crater; Black lavas Comment
  POM312924  Narthecium californicum H. 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
  UC1199830  Navarretia atractyloides Herbert L. Mason 1946-6-8 12844 Santa Barbara s side Big Pine Mountain (Bluff Camp) Comment
  RSA310959  Navarretia capillaris H. L. Mason 1939-7-7 12156 Nevada Three miles west of Donner Summit 2073 Comment
  UC907877  Navarretia capillaris Herbert L. Mason 1932-9-9 7184 Calaveras w Ebbett's Pass (Sierra Nevada); , w of Ebbett's Pass Comment
  SEINET196212  Navarretia cotulifolia Herbert L. Mason 1934-4-30 8111 Napa Tributary of Putah Creek, Pope Valley Comment
  POM310912  Navarretia divaricata H. L. Mason 1941-7-12 12478 Tuolumne Miguel Meadows, Yosemite National Park Comment
  UC908211 Image available Navarretia divaricata Herbert L. Mason 1941-6-10 12484 Tuolumne east of North Mountain, North Mountain Ridge, Yosemite National Park, Comment
  UC9637755  Navarretia divaricata Herbert L. Mason Jul 7 1939-Jul 8 1939 12150 Nevada 3 mi w Donner Summit 2072 Comment
  UC971707  Navarretia divaricata H. L. Mason 1941-7-12 12478 Tuolumne Miguel Meadows Yosemite National Park Comment
  UCD39813  Navarretia divaricata Herbert L. Mason 1946-6-8 12852 Santa Barbara San Rafael Mountains, Big Pine Mountain, summit of road. Comment
  UC963757  Navarretia divaricata Herbert L. Mason 1926-5-29 3295 Nevada 3 mi w Cisco; Crystal Lake 1767 Comment
  UC908393 Image available Navarretia divaricata subsp. vividior Herbert L. Mason 1941-7-12 12480 a Tuolumne Miguel Meadows, Yosemite National Park Comment
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Aug 18 2015
  UC665599  Navarretia hamata subsp. parviloba Herbert L. Mason 1941-7-21 12471 Santa Barbara s of Casmalia Comment
  CAS-BOT-BC230308  Navarretia heterandra Herbert L. Mason 1946-5-30 12791 Lake Locomono Creek near Middletown Comment
  SEINET200255  Navarretia heterandra Herbert L. Mason 1953-6-8 14526 Lake Locomono Meadow, north of Middletown Comment
  UC908879  Navarretia heterandra Herbert L. Mason 1946-5-30 12816 Colusa near Eppersons; Bear Valley Comment
  UC908140  Navarretia intertexta H. L. Mason 1924-6-26 1096 Plumas Blairsden Comment
  UC908145  Navarretia intertexta H. L. Mason 1933-5-29 8243 El Dorado Shingle Springs, Sierra Nevada foothills Sierra Nevada Comment
  UC908165  Navarretia intertexta Herbert L. Mason 1946-5-30 12798 Lake 3 mi e Middletown Comment
  UC908208  Navarretia intertexta H. L. Mason 1926-5-28 3260 El Dorado between Shingle Springs and Coloma (Rose Springs (Eggers), Sierra Nevada foothills); Sierra Nevada, Rose Springs 396 Comment
  UC908383  Navarretia intertexta Herbert L. Mason 1946-5-30 12790 Lake near Middletown; Locomono Creek 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
  UCD48480  Navarretia intertexta Herbert L. Mason 1926-5-28 3260 El Dorado Rose Springs (Eggers), between Shingle Springs and Coloma, Sierra Nevada foothills, El Dorado County. 396 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
  UC1178896  Navarretia intertexta subsp. propinqua Herbert L. Mason 1947-7-8 13315 Modoc Cedar Pass, summit of Warner Range Warner Range 1920 Comment
  UC908642  Navarretia intertexta subsp. propinqua Herbert L. Mason Placer n of Lake Tahoe; Squaw Creek Valley 1889 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
  CAS-BOT-BC230319  Navarretia jepsonii Herbert L. Mason 1946-5-30 12792 Lake Locomono Creek near Middletown Comment
  SEINET197686  Navarretia jepsonii Herbert L. Mason 1945-6-28 12595 Lake Just below bridges east of Middletown. Comment
  UC1178924  Navarretia jepsonii Herbert L. Mason 1953-6-8 14525 Lake Guenoc Ranch; entrance Comment
  UC971993  Navarretia jepsonii Herbert L. Mason 1952-6-19 14307 Colusa Black Diamond Ridge Mendocino National Forest 609 Comment
  UCD48438  Navarretia jepsonii Herbert L. Mason 1946-5-30 12792 Lake Locomono Creek near Middletown, Lake County, California. Comment
  UC908436  Navarretia leptalea subsp. bicolor Herbert L. Mason Jul 7 1939-Jul 8 1939 12148 Nevada three mi w Donner Summit; w of Donner Summit 2072 Comment
  UC908434  Navarretia leptalea subsp. bicolor Herbert L. Mason 1923-7-28 663 Tuolumne Porcupine Flat Comment
  UC963753  Navarretia leucocephala H. L. Mason 1929-4-7 5172 Stanislaus 6 mi w Oakdale Comment
  UC700271 Image available Navarretia leucocephala subsp. pauciflora H. L. Mason 1945-5-12 12583 Lake 5 mi n Lower Lake; ; 5 mi. N of Lower Lake, Lake Co. Comment
  UC908077  Navarretia leucocephala subsp. pauciflora Herbert L. Mason 1945-5-12 12584 Lake 3 mi n Lower Lake Comment
  UC1191635  Navarretia linearifolia subsp. linearifolia Herbert L. Mason 1947-8-8 13455 Modoc nw Alturas (Ingalls Swamp); n of Big Sage Reservoir, Ingalls Swamp Comment
  GH91332  Navarretia pauciflora H. L. Mason 1945-5-12 12583 Unknown Playa strewn with obsidion rubble and surrounded by chaparral, 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
  POM312615  Navarretia prostrata H. L. Mason 1952-5-18 14292 Merced Santa Fe Grade east of Los Banos, San Joaquin Valley Comment
  UC908884  Navarretia pubescens Herbert L. Mason 1946-5-30 12787 Lake near Middletown; Locomono Meadow Comment
  SEINET196697  Navarretia pubescens Herbert L. Mason 1935-5-30 8330 Lake Between Lower Lake and Knoxville Mine. Comment
  UC908882  Navarretia pubescens H. L. Mason 1938-5-10 11822 Madera n of Wood Lake (on Sequoia National Park road); Sierra Nevada 1828 Comment
Read comments
Jul 18 2020
  UC909038  Navarretia setiloba Herbert L. Mason 1935-5-2 8387 Kern e of Bakersfield Comment
  UC908875  Navarretia squarrosa H. L. Mason 1926-6-15 3394 Alameda University of California Campus, Berkeley Berkeley, University of California Campus Comment
  UC908405  Navarretia tagetina Herbert L. Mason 1945-6-28 12593 Lake e of Middletown (just below bridge) Comment
  UC1111588  Navarretia viscidula Herbert L. Mason 1947-5-18 14791 Tehama w of Paskenta (base of Paskenta Grade); Paskenta Grade Comment
  UC909076  Navarretia viscidula Herbert L. Mason 1935-5-30 8321 Napa just s Napa State Hospital 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
  UC635588  Nemacladus longiflorus var. longiflorus H. L. Mason 1926-4-30 3145 San Diego Oak Grove 853 Comment
  UC635592  Nemacladus longiflorus var. longiflorus H. L. Mason April 1926 3177 a San Diego Oak Grove Comment
  SEINET10461249  Nemacladus montanus Mason 1935-5-30 Mason 10000 Napa 4 miles north of Knoxville Mines Comment
  SEINET3815167 Image available Nemacladus rubescens var. rubescens Herbert L. Mason 1935-4-30 8281 c San Bernardino Head of Poison Canyon Comment
  SEINET10461004  Nemacladus secundiflorus Mason 1927-5-16 Mason 3736 San Luis Obispo Comment
  UC595055  Nemophila heterophylla H. L. Mason 1938-5-1 11743 Lake Barlett Springs Bartlett Springs 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
  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
  POM256414  Nemophila pedunculata H. L. Mason 1938-5-1 11744 Lake Bartlett Springs. Comment
  UC1178999  Nemophila pedunculata Herbert L. Mason 1947-7-8 13313 Modoc Cedar Pass , Cedar Pass (summit Warner Range) 1920 Comment
  UC592127  Nemophila pedunculata H. L. Mason 1929-3-15 5070 Santa Clara San Antonio Valley Mount Hamilton Range, San Antonio Valley Comment
  UC672359  Nemophila pedunculata Herbert L. Mason 1926-3-21 2773 Lake St. Helena Creek St. Helena Creek (along streams) Comment
  UC595050  Nemophila spatulata H. L. Mason 1938-7-15 11959 Tuolumne Tamarack Flat , Tamarack Flat (Yosemite National Park) 1950 Comment
  UC1191770  Nicotiana attenuata Herbert L. Mason and S. Galen Smith 1948-8-19 8364 Merced about 2 mi ne Merced (on Snelling highway) Comment
  UC570704  Nicotiana glauca H. L. Mason 1928-10-2 4983 Monterey 1 mi below Salinas (Salinas River); Salinas River Comment
  UC570698  Nicotiana obtusifolia Herbert L. Mason 1926-4-27 3069 San Bernardino Dead Man Point; Mojave Desert Comment
  A356882  Notholithocarpus densiflorus H. L. Mason 1934-9-3 Unknown White plains, three miles east of Mendocino City Comment
  UC985676  Nuphar lutea subsp. polysepala Herbert L. Mason, Verne Grant 1947-7-12 13388 Modoc several miles s of Alturas (Irrigation ditch by Jones' Lane, off Highway 395) Comment
  UC985680  Nuphar lutea subsp. polysepala Herbert L. Mason, Verne Grant 1946-8-14 13029 Butte Canal near big pond on Sacramento Outing Club, Butte Sink Butte Sink; , Sacramento Outing Club Comment
  UC635508  Nuphar lutea subsp. polysepala H. L. Mason 1924-6-20 1089 Plumas in a lily pond near Greagle Lodge Comment
  UC672087  Odontostomum hartwegii Herbert L. Mason 1931-5-9 5877 Shasta hills n. Redding Comment
  UC673620  Odontostomum hartwegii Herbert L. Mason 1928-5-4 4517 El Dorado between Green Valley and Eggars Comment
  CAS-BOT-BC140429  Oemleria cerasiformis H. L. Mason 1921-7-14 s.n. San Mateo Pescadero Creek Comment
  UC1191952  Oenanthe sarmentosa Herbert L. Mason 1946-7-24 12928 Marin 2nd. lake s. Bear Valley (on rd to Lake Ranch) Comment
  UC634687  Oenothera primiveris subsp. primiveris H. L. Mason 1926-4-27 3074 San Bernardino near Victorville Comment
  UC672295  Oreostemma alpigenum var. andersonii H. L. Mason 1923-7-28 654 Tuolumne White Wolf, Mather to Tuolumne Meadows (Tioga Pass Rd) Sierra Nevada Mts, Yosemite National Park 2438 Comment
  UC1076295  Orobanche bulbosa Herbert L. Mason 1923-6-19 518 Ventura above Ojai (Topatopa Mountains, Horn Canyon); Topatopa Mountains, Horn Canyon Comment
  JEPS19482  Orobanche californica subsp. californica Herbert L. Mason 1927-7-28 3983 San Mateo Pigeon Point. Comment
  UC1199825  Orobanche californica subsp. grayana Herbert L. Mason 1939-7-11 12127 Tuolumne Yosemite National Park, Miguel Meadow, west of Hetch Hetchy Valley. Comment
  UC1076298  Orobanche cooperi Herbert L. Mason 1926-4-26 3021 Los Angeles Mohave Desert, Little Rock Creek Little Rock Creek; Mohave Desert, Little Rock Creek Comment
  JEPS19481  Orobanche fasciculata Herbert L. Mason 1925-4-12 1321 Marin Mt. Tamalpais. Comment
  UC1076301  Orobanche fasciculata Herbert L. Mason 1926-5-7 2704 Contra Costa Near Summit of Mount Diablo. Comment
  UC1076305  Orobanche fasciculata Herbert L. Mason 1926-6-18 502 Ventura Timber Canyon, Topatopa Mts. Comment
  UC1076307  Orobanche fasciculata Herbert L. Mason 1934-5-5 8115 Lake Plain southwest of Mount Konocti. Comment
  UC1076308  Orobanche fasciculata Herbert L. Mason 1925-4-12 1321 Marin Mt. Tamalpais. Comment
  UC1076312  Orobanche uniflora subsp. occidentalis Herbert L. Mason 1929-4-29 5229 Lake Hopland Grade, 3 miles south of Hopland. Comment
  UC1076297  Orobanche vallicola Herbert L. Mason 1929-9-21 5432 Contra Costa 3 mi above Clayton (Marsh Creek Road); Marsh Creek Road Comment
  UC592173  Osmorhiza berteroi Herbert L. Mason 1926-6-6 3371 Santa Cruz Felton Comment
  UC592162  Osmorhiza berteroi H. L. Mason 1926-3-22 2788 Napa between Calistoga to Petrified Forest Comment
  UC566811  Osmorhiza brachypoda H. L. Mason 1927-6-14 3757 Los Angeles San Antonio Canyon 914 Comment
  UC571125  Oxalis albicans subsp. californica Herbert L. Mason 1926-4-25 2927 Orange 5 mi s Laguna Comment
  UC634783  Oxypolis occidentalis H. L. Mason 1925-7-29 2185 Tuolumne near Mather; Hog Ranch Comment
  UC566648  Packera breweri H. L. Mason 1928-5-6 4555 Alameda Cedar Mountain Mount Hamilton Range Comment
  UC1081561  Packera cana Herbert L. Mason 1936-8-1 11478 Mono Leevining Canyon Sierra Nevada, Yosemite National Park, Leevining Canyon (Yosemite National Park, Sierra Nevada) Comment
  UC912483  Packera greenei Herbert L. Mason 1930-6-1 5682 Lake St. Helena Creek, slopes of Mount St. Helena Mount St. Helena Comment
  UC965583  Packera streptanthifolia Herbert L. Mason 1952-7-18 14400 Nevada upstream from University of California Trout Laboratory (Sage Hen Creek); Sierra Nevada, Sage Hen Creek 1981 Comment
  CAS-BOT-BC325493  Packera werneriifolia Herbert Louis Mason 1936-7-24 11329 Tuolumne White Mountain, Mount Conness Range, Sierra Nevada. 3505 Comment
  UC566650  Packera werneriifolia H. L. Mason 1922-8-2 341 Tuolumne Mt. Dana Sierra Nevada Mountains, , Mt. Dana (Yosemite National Park) Comment
  UC714475  Packera werneriifolia H. L. Mason 1936-7-23 11308 Tuolumne slopes Mount Conness (Sierra Nevada); , Mount Conness 3505 Comment
  CAS-BOT-BC121244  Paeonia californica H. L. Mason 1926-4-30 3149 San Diego Oak Grove 853 Comment
  UC1101579  Panicum acuminatum var. acuminatum Herbert L. Mason, S. Galen Smith 1949-8-19 8372 Merced bridge below Snelling; San Joaquin River Comment
  POM313202  Panicum dichotomiflorum H. L. Mason 1945-9-19 12720 Colusa Below caus[e]way over Butte Sink spillway, East bank of Sacramento River, 1 mile north of Colusa. Comment
  SACT001636  Panicum huachucae Herbert Mason 1949-8-19 Merced Sandy river bottom. Comment
  UC570862  Parnassia californica Herbert L. Mason 1923-8-22 761 Tuolumne Tuolumne River, Lyell Fork Tuolumne River; , Lyell Fork Comment
  UC1178909  Parvisedum pentandrum Herbert L. Mason 1940-5-5 12278 Merced Inner South Coast Range, North Twin Peak (Diablo Range), North Fork of Los Banos Creek North Fork of Los Banos Creek; Inner South Coast Range, North Twin Peak Comment
  UC571849  Parvisedum pumilum H. L. Mason 1935-5-5 3645 Napa 3 mi s of Napa City Comment
  UC571854  Parvisedum pumilum H. L. Mason 1935-5-5 3494 Napa 3 mi s of Napa City Comment
  UCD88926  Paspalum distichum H. L. Mason 1945-9-18 12701 Sutter Sutter By-pass near bridge on Yuba City. Knight's Landing Highway. Comment
  SACT001672  Paspalum distichum Herbert Mason 1945-9-18 Sutter Primary invader of ponds, margins of pools on overflow lands of Sutter by-pass near bridge on Yuba City-KIght's Landing Highway. Comment
  UC635622  Paxistima myrsinites H. L. Mason 1934-4-28 8079 Sonoma Dohrman Creek at head of Jensen's Ranch Comment
  UC573132  Pectocarya setosa Herbert L. Mason 1932-4-1 6889 Kern 5 mi s Muroc; Mojave Desert Comment
  UC1076524  Pedicularis attollens Herbert L. Mason 1941-7-7 12513 Madera just s of the Givens Lake Trail junction; Sierra Nevada, Yosemite National Park 2865 Comment
  UC1199881  Pedicularis attollens H. L. Mason 1924-6-26 Plumas Blairdsen Comment
  UC672550  Pedicularis groenlandica H. L. Mason 1922-7-25 328 Mariposa Porcupine Flat, Tioga Pass Road Porcupine Flat 2133 Comment
  UC632784  Pedicularis semibarbata H. L. Mason 1936-7-6 11146 Mariposa Hetch Hetchy Trail w of Yosemite Creek; Yosemite National Park 2377 Comment
  UC672546  Pedicularis semibarbata H. L. Mason 1927-6-15 3771 San Bernardino summit of Mount Baldy 2438 Comment
  UC1076538  Pellaea breweri Herbert L. Mason 1938-7-29 12048 Tuolumne w of Tower Peak (Saurian Crest); Sierra Nevada, Yosemite Nat'l Park 3200 Comment
  UC565585  Penstemon centranthifolius H. L. Mason 1926-4-27 3032 Los Angeles Rock Creek San Gabriel Mountains, Rock Creek Comment
  UC566668  Penstemon centranthifolius H. L. Mason 1929-3-31 5156 Contra Costa sand dike along San Joaquin River (Antioch); sand dike along San Joaquin River, Antioch Comment
  CAS-BOT-BC265315  Penstemon davidsonii var. davidsonii Herbert L. Mason 1936-7-23 11291 Tuolumne Slope of Mount Conness 3505 Comment
  UC565580  Penstemon deustus Herbert L. Mason 1926-5-30 3310 El Dorado back Emerald Bay; Lake Tahoe, back of Emerald Bay Comment
  UC712255  Penstemon heterodoxus Herbert L. Mason 1936-7-23 11307 Tuolumne alpine slopes of Mount Conness Sierra Nevada, Mount Conness 3505 Comment
  UC1093874  Penstemon laetus var. laetus Herbert L. Mason 1938-7-26 12017 Tuolumne s Jack Main Meadows (Andrews Peak, Yosemite National Park); Sierra Nevada, Yosemite National Park 2438 Comment
  UC565591  Penstemon newberryi var. newberryi Herbert L. Mason 1923-7-21 631 Tuolumne Hetch Hetchy Valley - Canyon Ranch Comment
  UC565599  Penstemon rydbergii var. oreocharis Herbert L. Mason 1926-6-19 1085 Plumas Gold Lake Comment
  UC912264  Pentachaeta exilis Herbert L. Mason 1933-4-21 7192 Santa Clara lower slopes Mount Hamilton Comment
  UC1191182  Pentagramma pallida Herbert L. Mason 1935-5-1 8371 Tulare n of Kernville (Kern River); Sequoia National Park Comment
  CAS-BOT-BC77150  Pentagramma triangularis subsp. triangularis Miss. Mason s.n. Orange Orange Comment
  UC1039642  Perityle emoryi Herbert L. Mason 1935-4-30 8293 San Bernardino sw Trona (Poison Canyon); Poison Canyon Comment
  CAS-BOT-BC419349  Persicaria punctata Herbert L. Mason; S. Galen Smith 1948-8-9 8286 Merced Pacheco Creek, about 10 miles west of summit of Pacheco Pass Comment
  UC1076251  Petrorhagia dubia Herbert L. Mason 1927-5-11 3735 Yuba flat w North San Juan; flat w of North San Juan Comment
  UC672408  Phacelia Herbert L. Mason 1931-5-9 5867 Siskiyou Shasta Creek Comment
  UC1275798  Phacelia bicolor var. bicolor Herbert L. Mason 1963-6-12 15207 Mono Danburg Beach Mono Lake 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
  UC672337  Phacelia breweri Herbert L. Mason 1928-5-6 4550 Alameda Cedar Mountain Comment
  POM256513  Phacelia breweri H. L. Mason 1938-5-3 11750 Contra Costa Trail between Juniper Camp and Deer Flat, Mount Diablo. Comment
  UC753511  Phacelia cicutaria var. hispida Herbert L. Mason 1946-6-7 12827 Santa Barbara Middle Cameusa Camp San Rafael Range 762 Comment
  UC753520  Phacelia cicutaria var. hispida Herbert L. Mason 1946-6-7 12842 Santa Barbara road up Little Pine Mountain San Rafael Range 914 Comment
  UC672404  Phacelia crenulata var. ambigua Herbert L. Mason 1926-4-28 3104 San Bernardino Box S Ranch, Mohave Desert 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
  UC672415  Phacelia distans Herbert L. Mason 1928-5-6 4564 Alameda Cedar Mountain Comment
  UC672419  Phacelia distans Herbert L. Mason 1928-4-28 4418 Marin Tiburon Peninsula Comment
  UC672420  Phacelia distans Herbert L. Mason 1933-4-21 7202 Santa Clara n Mount Hamilton; Packard Ridge Comment
  UC672425  Phacelia distans Herbert L. Mason 1929-3-15 5053 Contra Costa canyon back of Nortonville Comment
  UC672342  Phacelia douglasii H. L. Mason 1932-3-20 6838 Contra Costa Antioch Sand Hills Comment
  UC1077105  Phacelia hastata subsp. compacta Herbert L. Mason 1938-7-28 12038 Tuolumne Tilden Lake Sierra Nevada, Yosemite National Park, Macomb Ridge 3048 Comment
  UC753521  Phacelia imbricata Herbert L. Mason 1946-6-8 12849 Santa Barbara Bluff Camp San Rafael Range (along road) 1371 Comment
  UC1178996  Phacelia insularis var. continentis Herbert L. Mason 1940-5-22 12301 Mendocino headland n Pudding Creek Slough (near Fort Bragg) Comment
  UC1051496  Phacelia pachyphylla Herbert L. Mason 1952-4-11 14248 San Bernardino just e Daggett; Black Lava Bed Comment
  POM252665  Phacelia phacelioides H. L. Mason 1938-5-3 11749 Contra Costa Trail between Juniper Camp and Deer Flat, Mount Diablo. Comment
  UC1076535  Phacelia racemosa Herbert L. Mason 1938-7-22 11961 Tuolumne n Hetch Hetchy; Sierra Nevada, Yosemite National Park, Beehive 1996 Comment
  UC672348  Phacelia ramosissima var. montereyensis Herbert L. Mason 1927-7-30 3995 Monterey Carmel Comment
  POM256519  Phacelia ramosissima var. subglabra H. L. Mason 1939-7-18 12174 El Dorado North side of Luther Pass, one mile west of Grass Lake Meadow. Comment
  UC588130  Phacelia rattanii Herbert L. Mason 1937-5-27 11551 Lake six mi n Lower Lake Comment
  RSA74699  Phacelia rattanii H. L. Mason 1937-5-27 11551 Lake 6 miles N of Lower Lake. Comment
  UC1051472  Phacelia rotundifolia Herbert L. Mason 1952-4-11 14254 San Bernardino black lavas n Pisgah Crater Comment
  UC1077133  Phacelia rotundifolia Herbert L. Mason 1940-3-22 12239 Inyo Titus Canyon Death Valley National Monument, Graevine Mountains (in gravelly wash) Comment
  UC672350  Phacelia tanacetifolia Herbert L. Mason 1932-4-1 6887 Kern 5 mi s Muroc; Mojave Comment
  UC672351  Phacelia tanacetifolia Herbert L. Mason 1926-4-10 2807 Alameda Arroyo Mocho Canyon Cedar Mt. Comment
  CDA40453  Phacelia tanacetifolia Steve Mason, Joey Artero 1993-4-24 15 San Luis Obispo Carrizo Plain Natural Area, northeast side road off Elkhorn Rd., 1.2 mi. south of Elkhorn and Simmler Roads' junction, 300 feet up road on left roadside past washing machine. Comment
  UC1076466  Phalacroseris bolanderi Herbert L. Mason 1941-7-7 12499 Madera s of Givens Meadows; Yosemite National Park, Buck Camp Comment
  UC1178971  Phalaris lemmonii Herbert L. Mason 1929-4-7 5174 Stanislaus six mi w Oakdale Comment
  UC936192  Phalaris lemmonii Herbert L. Mason 1932-4-17 6953 Santa Clara Miller and Lux Ranch se Gilroy 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
  UC714200  Phlox caespitosa Herbert L. Mason 1939-7-28 11405 Mono vicinity Mount Dana; Sierra Nevada, Dana Plateau 3657 Comment
  UC714201  Phlox caespitosa H. L. Mason 1936-7-31 11456 A Mono e of Saddlebag Lake; Sierra Nevada, Tioga Crest 3474 Comment
  UC1186123  Phlox douglasii subsp. rigida H. L. Mason 1923-8-9 741 Tuolumne n of 2nd Gaylor Lake; Sierra Nevada Mountains, Yosemite National Park 3048 Comment
  UC908447  Phlox gracilis Herbert L. Mason 1924-6-18 1059 Sierra 1 mi from Gold Lake (near Plumas-Sierra County line) 1981 Comment
  UC909129  Phlox gracilis Herbert L. Mason 1925-3-23 1307 Alameda Sunol Comment
  UC965587  Phlox gracilis Herbert L. Mason 1952-7-16 14351 Nevada 1 mi w Univ. of Calif. Trout Laboratory; Sierra Nevada, Sage Hen Creek 1981 Comment
  UC1093649  Phoenicaulis cheiranthoides Herbert L. Mason 1957-7-6 14720 Modoc Mill Creek; Warner Mountains, Mill Creek 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
  UC1039591  Phoradendron villosum Herbert L. Mason 1926-1-1 2591 Mendocino summit Elk Mt. Comment
  UC1039592  Phoradendron villosum H. L. Mason 1925-12-31 2573 Lake <Bartlet> Mt. Rd. Comment
  UC635115  Phyla lanceolata H. L. Mason 1929-9-9 5428 San Joaquin San Joaquin River delta Holt; San Joaquin River delta Comment
  UC712456  Phyllodoce breweri Herbert L. Mason 1936-7-23 11306 Tuolumne Tioga Pass region, Mount Conness Mount Conness; Tioga Pass region, Mount Conness 3474 Comment
  CAS-BOT-BC452067  Phyllospadix torreyi Herbert L. Mason 1927-11-27 4145 Santa Barbara Carpinteria Comment
  RSA170175  Phyllospadix torreyi H. L. Mason 1927-11-26 s.n. Santa Barbara Carpinteria. Comment
  UC985936  Physalis lancifolia Herbert L. Mason and Verne Grant 1946-8-7 12979 Colusa 8 mi n Colusa; Butte Sink Comment
  UC1055936  Pilularia americana Herbert L. Mason 1952-4-14 14261 Contra Costa 3.5 mi s Byron Comment
  UC1083386  Pinus Herbert L. Mason 1941-3-27 12391 Santa Barbara Burton Mesa Pine Canyon, Burton Mesa (Pine Canyon, w Santa Barbara County) Comment
  CAS-BOT-BC78271  Pinus albicaulis Herbert L. Mason 1936-8-6 11519 Mono between Saddlebag Lake and Conness Glacier 3200 Comment
  NY34547  Pinus albicaulis H. L. Mason 1936-8-6 11519 Mono Hills between Saddlebag Lake and Conness Glacier 3200.4 Comment
  UC665719  Pinus albicaulis Herbert L. Mason 1936-8-6 11519 Mono hills between Saddlebag Lake and Conness Glacier; Sierra Nevada 3200 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
  GH357768  Pinus contorta H. L. Mason 1934-9-3 8146 Unknown White plains three miles east of Mendocino City, Mendocino County Comment
  UC665725  Pinus contorta H. L. Mason 1934-9-3 8148 Mendocino just N of Point Arena Comment
  SEINET4457213 Image available Pinus contorta H. L. Mason 1934-1 8146 Unknown Comment
  GH311216  Pinus contorta subsp. bolanderi H. L. Mason, N. T. Mirov & W. P. Stockwell 1948-6-9 2017 Unknown Two miles east of Mendocino City, Mendocino County Comment
  UC665720  Pinus contorta subsp. bolanderi Herbert L. Mason 1934-9-3 8146 Mendocino 3 mi e Mendocino City; White Plains Comment
  CAS-BOT-BC78399  Pinus contorta subsp. contorta H. L. Mason; N. T. Mirov; Palmer Stockwell 1948-6-9 2018 Mendocino Two miles east of Mendocino City Comment
  NY49718  Pinus contorta var. contorta H. L. Mason 1934-9-3 8148 Mendocino Just north of the town of Point Arena Comment
  POM264566  Pinus contorta var. contorta H. L. Mason 1934-9-3 8146 Mendocino White Plains, 3 miles east of Mendocino City Comment
  UC1076351  Pinus coulteri Herbert L. Mason 1929-10-8 5480 Contra Costa Nortonville Comment
  UC513600  Pinus coulteri H. L. Mason 1933-4-21 7210 Santa Clara ridge s Black Mountain; Mt. Hamilton Range Comment
  UC1191141  Pinus longaeva Herbert L. Mason 1953-7-21 14564 Mono e of Campito Mountain; White Mountains 2895 Comment
  UC1061639  Pinus muricata Herbert L. Mason Marin Inverness Comment
  UC1083383  Pinus muricata Herbert L. Mason 1941-3-28 12400 Monterey along road from Pacific Grove to Carmel; Huckleberry Hill Comment
  UC1076352  Pinus sabiniana Herbert L. Mason 1929-10-8 5481 Contra Costa Nortonville Comment
  UC1199828  Piperia transversa Herbert L. Mason 1937-7-22 11619 Tuolumne just s Miguel Meadows (just w of Hetch Hetchy Dam); Sierra Nevada, Yosemite National Park, Swamp Lake 1584 Comment
  UC1191839  Plagiobothrys cognatus Herbert L. Mason and Verne Grant 1947-7-12 13408 Modoc sw of Alturas (w side of the South Fork of Pit River Valley); South Fork of Pit River Valley Comment
  UC1191851  Plagiobothrys cusickii Herbert L. Mason and Verne Grant 1947-7-12 13421 Modoc s of Alturas (near s end of w side road, along railroad tracks); Pit River Valley Comment
  UC1191836  Plagiobothrys mollis Herbert L. Mason, Verne Grant 1947-7-10 13333 Modoc 2 mi e Alturas; Dorris Reservoir 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
  UC573147  Plagiobothrys nothofulvus Herbert L. Mason 1928-5-6 4575 Alameda Arroyo Mocho 6 mi from Livermore Comment
  CAS-BOT-BC58733  Plagiobothrys scouleri Herbert Louis Mason; Verne Grant 1947-7-12 13415 Modoc Pit River Valley, S of Alturas. Comment
  CAS-BOT-BC58747  Plagiobothrys scouleri Herbert Louis Mason; Verne Grant 1947-7-12 13421 Modoc Near S end of W side road, along railroad tracks, Pit River, S of Alturas. Comment
  CAS-BOT-BC58758  Plagiobothrys scouleri Herbert Louis Mason; Verne Grant 1947-7-12 13415 Modoc Pit River Valley, S of Alturas. Comment
  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
  UCD121009  Plagiobothrys stipitatus var. micranthus Herbert L. Mason; Verne Grant 1947-7-12 13410 Modoc West side of Pit River Valley, south of Alturas. Comment
  UC573071  Plagiobothrys tenellus H. L. Mason 1932-3-20 6847 Contra Costa Antioch sand hills Comment
  UC1111006  Plantago erecta Herbert L. Mason 1932-4-28 7038 Monterey Pajaro Hills Comment
  UC769969  Plantago erecta Herbert L. Mason 1934-3-25 7947 Sacramento Rio Linda, Keithly ranch Sacramento Valley 30 Comment
  RSA130694  Plantago lanceolata H. L. Mason 1917-04 s.n. Santa Clara Stanford Unversity. Comment
  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
  UC673578  Platanthera sparsiflora Herbert L. Mason 1922-7-3 305 Mariposa Big Tree Grove Sierra Nevada, Yosemite National Park 1524 Comment
  UC912454  Plectritis ciliosa subsp. ciliosa Herbert L. Mason 1927-5-11 3731 Yuba near Dobbins 457 Comment
  UC912460  Plectritis ciliosa subsp. ciliosa Herbert L. Mason 1928-5-4 4512 El Dorado 4 mi n of Shingle Springs (Greene Valley); Greene Valley Comment
  UC1108833  Poa annua Herbert L. Mason 1947-3-29 13152 Colusa ca 3 mi ne Colusa (Butte Sink, along Butte Creek) Comment
  UCD91078  Poa glauca subsp. rupicola H. L. Mason 1936-7-23 11312 Tuolumne Mt. Conness, Yosemite National Park. Comment
  SACT001882  Poa nevadensis Herbert Mason, Malcolm Nobs 1949-5-29 Modoc 2 miles east of Adin. Comment
  SEINET7294095 Image available Poa secunda subsp. secunda Herbert L. Mason 1952-1 14435 Nevada Sage Hen Creek; Meadow opposite University of California Trout Laboratory. 1981 Comment
  UC1100401  Poa secunda subsp. secunda Herbert L. Mason 1948-9-4 13652 Mono Rush Creek Mono Lake Comment
  UC1108817  Poa secunda subsp. secunda Herbert L. Mason 1938-7-25 12009 Tuolumne deep lake at e base of Mahan Peak; Sierra Nevada, Yosemite Nat'l Park Comment
  UCD91700  Poa secunda subsp. secunda H. L. Mason 1938-7-28 12034 Tuolumne Yosemite National Park. Macomb Ridge, N of Tiltill Mtn. Comment
  UC1108815  Poa wheeleri Herbert L. Mason 1936-7-24 11331 Tuolumne White Mt; Sierra Nevada, Conness Range Comment
  UCD91605  Poa wheeleri H. L. Mason 1936-7-24 11332 Tuolumne White Mountain. Comment
  UC1191805  Pogogyne floribunda Herbert L. Mason 1947-8-9 13474 Modoc east side of Fairchild Swamp north of Alturas. Comment
  JEPS16753  Pogogyne serpylloides Herbert L. Mason 1934-5-5 8117 Lake Plain Southwest of Mount Konocti. Comment
  UC570731  Pogogyne serpylloides H. L. Mason Apr 1930 5554 Calaveras Hills west of San Andreas Comment
  GH400806  Pogogyne serpylloides H. L. Mason 1930-04-01 - 1930-05-01 5554 Unknown Hills west of San Andreas Comment
  UC1988945  Pogogyne zizyphoroides H. L. Mason 1928-5-3 4476 Amador Hills near Carbondale Comment
  UC570729  Pogogyne zizyphoroides H. L. Mason 1928-5-3 4476 Amador Hills near Carbondale Comment
  UC570730  Pogogyne zizyphoroides Herbert L. Mason 1928-5-3 4448 San Joaquin 4 miles north of Clements Comment
  UC909080  Polemonium carneum Herbert L. Mason 1932-4-16 6932 Alameda summit <of road> Stonybrook Creek Comment
Read comments
May 31 2011
  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
  UC1178944  Polygala cornuta var. cornuta Herbert L. Mason 1948-7-11 13592 Shasta Hirz Mountain Comment
  CAS-BOT-BC167835  Polygala cornuta var. fishiae H. L. Mason 1923-6-20 524 Ventura Camp Comfort, San Antonio Canyon, Ojai Comment
  UC1192337  Polygonum amphibium var. emersum Herbert L. Mason 1928-9-30 4968 San Joaquin near Holt; San Joaquin Delta Comment
  UC1083114  Polygonum amphibium var. stipulaceum Herbert L. Mason 1936-7-15 11257 a Tuolumne margin of pool 0.5 mi w Mather 1371 Comment
  UC1101137  Polygonum amphibium var. stipulaceum Herbert L. Mason 1946-7-27 12950 Lake 2-3 mi n Lakeport; Clear Lake Comment
  UC1101138  Polygonum amphibium var. stipulaceum Herbert L. Mason and Lawrence M. Reinecke 1937-7-22 11616 Tuolumne just w Hetch Hetchy Dam (s of Miguel Meadows); Yosemite National Park, Swamp Lakes 1584 Comment
  UC965565  Polygonum amphibium var. stipulaceum Herbert L. Mason 1952-7-19 14453 Sierra 1.5 mi e Calpine (at junction of Calpine with Sierra-Beckwourth road); Sierra Nevada, Sierra Valley 1524 Comment
  POM312542  Polygonum amphibium var. stipulaceum H. L. Mason, L M Reinecke 1937-7-22 11616 Tuolumne Yosemite Nat'l Park: Swamp Lake, just south of Miguel Meadows, just west of Hetch Hetchy Dam 1585 Comment
  RSA28589  Polygonum davisiae H. L. Mason 1940-7-30 12353 Alpine Open Tsuga Mertensiana and Juniperus occidentalis forest, hills N of Carson Pass 2683 Comment
  CAS-BOT-BC414504  Polygonum douglasii Herbert L. Mason 1936-7-12 11229 a Mariposa Sierra Nevada, Yosemite National Park. Peregoy Meadow, Glacier Point road Comment
  UCD100248  Polygonum douglasii Herbert L. Mason 1948-7-17 13598 Siskiyou Eastern Grass Lake. Comment
  UC1056967  Polygonum douglasii subsp. douglasii Herbert L. Mason 1936-7-29 11442 Mono cirque below Conness Glacier (w of Saddlebag Lake) 3200 Comment
  UC1178956  Polygonum douglasii subsp. douglasii Herbert L. Mason 1925-7-31 2206 Tuolumne Mather Sierra Nevada Comment
  UC1191245  Polygonum douglasii subsp. spergulariiforme Herbert L. Mason 1948-7-17 13594 Siskiyou Eastern Grass Lake Comment
  UC1101175  Polygonum hydropiperoides Herbert L. Mason and Verne Grant 1946-8-14 13027 Butte Sacramento Outing Club Butte Sink (canal near big pond) Comment
  UC1101177  Polygonum hydropiperoides Herbert L. Mason 1929-9-21 5442 San Joaquin Holt Alklaline Grasslands of San Joaquin Valley Comment
  UC1101178  Polygonum hydropiperoides Herbert L. Mason 1928-9-30 4971 San Joaquin near Holt; Alkaline Grasslands of San Joaquin Valley, San Joaquin Del Comment
  UC1101144  Polygonum lapathifolium Herbert L. Mason and Verne Grant 1946-8-28 13089 San Mateo s San Francisco (pond on Santa Cruz-Daly City Road #5) 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
  UC1191122  Polygonum paronychia Herbert L. Mason 1924-10-19 1118 San Francisco Country Club Gate San Francisco, Merced Lake (in sand hills) Comment
  CAS-BOT-BC419873  Polygonum polygaloides subsp. confertiflorum Herbert L. Mason 1948-7-17 13595 Siskiyou Eastern Grass Lake Comment
  CAS-BOT-BC218169  Polygonum polygaloides subsp. confertiflorum Herbert Louis Mason 1957-6-21 14706 Modoc West side of Said Valley. Comment
  UC1056968  Polygonum polygaloides subsp. kelloggii Herbert L. Mason 1936-7-29 11441 Mono cirque below Conness Glacier (w of Saddlebag Lake) 3200 Comment
  UC1060645  Polygonum polygaloides subsp. kelloggii Herbert L. Mason 1957-7-7 14729 Nevada sw Hobart Mills; Prosser Meadow Comment
  UC965540  Polygonum polygaloides subsp. kelloggii Herbert L. Mason 1952-7-10 14311 Nevada 1 mi w University of California Trout Laboratory; Sierra Nevada, Sage Hen Creek 1981 Comment
  CAS-BOT-BC420026  Polygonum polygaloides subsp. kelloggii Herbert L. Mason 1952-7-10 14311 Nevada Sierra Nevada. One mile west of University of California Trout Laboratory (12 miles north of Truckee). Sage Hen [Sagehen] 1981 Comment
  UC1713244  Polygonum polygaloides subsp. kelloggii Herbert L. Mason 1957-7-6 14725 Modoc Rim Rock, west of Goose Lake Comment
  UC1191265  Polygonum punctatum Herbert L. Mason 1946-7-24 12922 Marin margin of first lake s Bear Valley (2.8 mi n of Lake Ranch) Comment
  UC1191267  Polygonum punctatum Herbert L. Mason 1928-9-30 4969 San Joaquin near Holt; Alkaline Grasslands of San Joaquin Valley, San Joaquin Del Comment
  UC1191247  Polygonum sawatchense subsp. oblivium Herbert L. Mason and Verne Grant 1947-7-9 13309 Modoc Cedar Pass Warner Range (summit of range) 1920 Comment
  CAS-BOT-BC420171  Polygonum sawatchense subsp. sawatchense Herbert L. Mason; Verne Grant 1947-7-9 13288 Shasta Highway 299, just east of Hatchet Creek summit 1219 Comment
  UC1191248  Polygonum sawatchense subsp. sawatchense Herbert L. Mason and Verne Grant 1947-7-9 13288 Shasta Hwy 299 just e Hatchet Creek summit 1219 Comment
  CAS-BOT-BC109254  Polygonum shastense Herbert L. Mason 1936-7-21 11259 Mariposa Sierra Nevada. Yosemite National Park. West of Tenaya Lake. 2499 Comment
  UCD136912  Polypodium scouleri Herbert L. Mason 1924-11-16 1150 Marin Willow Camp. Comment
  UC1100389  Polypogon monspeliensis Herbert L. Mason 1948-9-4 13644 Mono Rush Creek Mono Lake; , Rush Creek Comment
  UC1100390  Polypogon monspeliensis Herbert L. Mason and Verne Grant 1946-8-28 13094 San Mateo pond on Highway 5 about 3 mi s Daly City Road 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
  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
  SEINET8040796  Porterella carnosula H. L. Mason 1952-7-19 14439 Sierra Sierra Valley, margins of marshy pond 1.5 miles E of Calpine, near junction of Sierraville-Beckwith road and Calpine road. Comment
  UC1099891  Potamogeton crispus Herbert L. Mason, S. Galen Smith 1948-8-5 8269 San Joaquin Trapper's Slough Robert's Island Comment
  UC1099895  Potamogeton crispus Herbert L. Mason 1946-6-28 12877 Alameda San Leandro Creek Comment
  CAS-BOT-BC452149  Potamogeton diversifolius Herbert L. Mason 1945-6-29 12624 Lake Boggs Lake at base of Mount Hanna [Hannah] Comment
  UC1100038  Potamogeton foliosus Herbert L. Mason 1946-6-28 12878 Alameda San Leandro Creek Comment
  CAS-BOT-BC267168  Potamogeton foliosus H. L. Mason 1921-5-23 s.n. Santa Clara Lagunita Stanford Campus Comment
  UC1099858  Potamogeton gramineus Herbert L. Mason 1948-9-5 13671 Mono junction of Highway 108 and Highway 395 Comment
  UC1099907  Potamogeton gramineus Herbert L. Mason 1929-10-4 5467 El Dorado 14 mi from Tahoe City (w side of Lake Tahoe above Emerald Bay); Lake Tahoe Comment
  UC1099852  Potamogeton illinoensis Herbert L. Mason, S. Galen Smith 1948-8-19 8370 Merced bridge below Snelling; San Joaquin River Comment
  POM313025  Potamogeton nodosus H. L. Mason 1945-8-24 12683 Lake East shore, Lower Lake. Comment
  UCD138250  Potamogeton nodosus Herbert L. Mason 1946-5-18 12770 Mendocino six miles north of Fort Bragg, Comment
  UC1099815  Potamogeton pectinatus Herbert L. Mason, S. Galen Smith 1948-7-27 8220 Merced 1/4 mi s of Ingomar Comment
  UC1191228  Potamogeton pectinatus Herbert L. Mason, Verne Grant 1946-8-28 13091 San Mateo about 3 mi s of Daly City Road (near Highway 5) Comment
  UC1099833  Potamogeton pectinatus Herbert L. Mason 1948-9-4 13672 Mono Junction of Highway 178 and Highway 395 Comment
  UCD138286  Potamogeton pusillus Herbert L. Mason 1948-6-29 13581 Merced 5 miles north of Volta. Comment
  UC1100032  Potamogeton pusillus var. pusillus Herbert L. Mason 1948-6-29 13581 Merced 5 mi n of Volta; San Joaquin Valley Comment
  UC1100040  Potamogeton pusillus var. pusillus Herbert L. Mason, S. Galen Smith 1948-8-19 8362 Merced about 2 mi ne of Merced (on Snelling Highway) Comment
  UC1100037  Potamogeton pusillus var. pusillus Herbert L. Mason 1947-8-8 13468 Modoc nw of Alturas (sw margin of Big Sage Reservoir); Big Sage Reservoir Comment
  CAS-BOT-BC242271  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
  CAS-BOT-BC267233  Potamogeton robbinsii Herbert L. Mason 1938-7-6 11857 Tuolumne Yosemite National Park. Swamp Lake, W of Hetch Hetchy 1584 Comment
  RSA313010  Potamogeton zosteriformis H. L. Mason 1947-7-12 13384 Modoc Irrigation ditch by Jones Lane, off Hwy 395, several miles S of Alturas. Comment
  UC673318  Potentilla amicarum Herbert L. Mason 1923-8-9 746 Tuolumne Gaylor Lakes Sierra Nevada, , Gaylor Lakes (Yosemite National Park) Comment
  UC673326  Potentilla amicarum Herbert L. Mason 1923-8-9 747 Tuolumne Gaylor Lakes Sierra Nevada, Yosemite National Park, Gaylor Lakes Comment
  UC555624  Potentilla anserina subsp. pacifica Herbert L. Mason 1927-4-24 3701 San Mateo mouth of San Gregorio Creek 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
  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
  UC555508  Potentilla fruticosa Herbert L. Mason 1923-8-9 744 Tuolumne ridge e second lake (Gaylor Lakes); , ridge e of second lake Comment
  UC555701  Potentilla gracilis var. fastigiata H. L. Mason 1923-8-21 753 Tuolumne n base Puppy Dome (Tuolumne Meadows); , n base of Puppy Dome Comment
  CAS-BOT-BC214802  Potentilla rivalis Herbert Louis Mason 1947-8-13 13518 Modoc NE side of F reservoir, N of Canby. Comment
  UC570725  Prunella vulgaris var. lanceolata H. L. Mason 1923-7-16 614 Tuolumne Hog Ranch Yosemite National Park; Sierra Nevada Mountains, Yosemite National Park Comment
  A346446  Prunus emarginata H. L. Mason 1933-9-2 7263 Unknown Silver Lake, Sierra Nevada Mountains Comment
  UC672645  Prunus emarginata H. L. Mason 1933-9-2 7263 Amador Silver Lake; Sierra Nevada Mountains, Silver Lake Comment
  A346491  Prunus fasciculata H. L. Mason 1935-5-1 10007 Unknown Ridge south of Isabella Comment
  A346505  Prunus fasciculata var. punctata H. L. Mason 1941-5-28 12403 Unknown north end of Nipomo mesa 76 Comment
  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
  UC555690  Prunus ilicifolia subsp. lyonii Herbert L. Mason 1927-9-23 4081 Santa Barbara back of Prisoner's Harbor (Santa Cruz Island); Santa Cruz Island Comment
  RSA112479  Prunus subcordata H. L. Mason 1921-3-9 s.n. San Mateo Near zoo, shack. At edge of Redwoods. Jasper Ridge. Comment
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Sep 19 2011
  GH346738  Prunus virginiana var. demissa H. L. Mason 1927-6-15 3777 Unknown San Gabriel Mountains 2590 Comment
  UC632864  Pseudobahia heermannii H. L. Mason 1936-3-20 11002 Tuolumne 3 mi above Tuolumne Comment
  UC632859  Pseudobahia heermannii H. L. Mason 1936-3-21 11021 Mariposa 3 mi n of Coulterville Comment
  UC632842  Pseudognaphalium biolettii H. L. Mason 1936-3-6 10989 San Luis Obispo 11 mi w San Luis Obispo; Pecho Hills Comment
  UC672212  Pseudognaphalium biolettii H. L. Mason 1934-4-1 Monterey growing along cliffs above the road along the ocean Lucia Comment
  UC581138  Pseudognaphalium californicum H. L. Mason 1932-8-28 7170 Mendocino Point Arena Comment
  UC672214  Pseudognaphalium stramineum H. L. Mason 1933-5-29 7250 Amador chaparral hills above Ione Comment
  UC672216  Pseudognaphalium stramineum H. L. Mason 1934-4-1 Monterey Lucia Comment
  UCD135108  Pseudotsuga macrocarpa Steve Mason; Helen M. Mason 1993-5-15 24 b Los Angeles On Angeles Crest Hwy. 3.5 mi. above Big Tujunga Cnyn. Rd. 1584 Comment
  CAS-BOT-BC361774  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
  UC1178819  Psilocarphus brevissimus var. brevissimus Herbert L. Mason 1953-4-5 14507 Colusa about 3 mi e Maxwell (near bend in road by bench mark) Comment
  CAS-BOT-BC361693  Psilocarphus brevissimus var. brevissimus Herbert L. Mason 1952-4-14 14266 Contra Costa Vernal Pool 3.5 miles south of Byron Comment
  UC1111581  Psilocarphus brevissimus var. brevissimus Herbert L. Mason 1935-5-30 2837 Napa just s Napa State Hospital Comment
  UC1111607  Psilocarphus brevissimus var. brevissimus Herbert L. Mason 1938-5-6 11766 Monterey outside Jolon (at the junction to Indian Road, Santa Lucia Park) Comment
  UC2050284  Psilocarphus chilensis H. L. Mason 1935-3-30 8238 Kern plains west of Bakersfield Comment
  UC1178978  Psilocarphus oregonus Herbert L. Mason 1946-5-31 12801 Lake 1.5 mi w Lower Lake Comment
  UC1060667  Psilocarphus tenellus Herbert L. Mason 1957-5-11 14696 San Benito 2 to 3 mi e Hernandez Comment
  UC581109  Psilocarphus tenellus H. L. Mason 1934-4-28 8083 Sonoma Jensen's Ranch Dorhmann Creek Comment
  UC632837  Psilocarphus tenellus H. L. Mason 1936-4-12 11080 Calaveras Comanche, Sierra Nevada foothills Sierra Nevada Comment
  UC558488  Psilotum nudum Herbert L. Mason 1936-11-16 San Francisco In pot with cycad, Conservatory, Golden Gate Park, San Francisco Comment
  UC555339  Psorothamnus arborescens var. arborescens Herbert L. Mason 1926-4-27 3066 San Bernardino near Victorville; near Victorville Comment
  GH347954  Ptelea crenulata H. L. Mason 1928-3-31 Unknown Mt. Diablo Comment
  GH347958  Ptelea crenulata H. L. Mason 1928-4-1 4270 Unknown Canyon back of Antioch hills north of Mount Diablo Comment
  GH347960  Ptelea crenulata H. L. Mason 1928-5-4 4521 Unknown Granite Canyon southwest of Coloma Comment
  UC571099  Ptelea crenulata H. L. Mason 1928-5-4 4521 El Dorado sw of Coloma; Granite Canyon Comment
  UCD113382  Purshia tridentata var. glandulosa Steven Mason; Helen M. Mason 1993-5-9 41 Los Angeles Mt. Pinos area, on Lockwood Valley Road, 15.1 miles W of Frazier Mountain Road, 30' in from N side of road. 1676 Comment
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Sep 30 2014
  UC1199845  Pyrola asarifolia Herbert L. Mason and L. W. Reinecke 1937-7-22 11613 Tuolumne Swamp Lakes, south of Miguel Meadows in the hills just west of Hetch Hetchy dam, Yosemite National Park 1584 Comment
  GH362892  Pyrola asarifolia subsp. bracteata H. L. Mason 1925-07-01 - 1925-08-01 2891 Unknown Mount Elwell Comment
  UC635153  Pyrola minor H. L. Mason 1923-8-1 683 Tuolumne Elizabeth Lake Trail, Sierra Nevada Mountains Comment
  UC1081530  Pyrrocoma apargioides Herbert L. Mason 1936-7-27 11374 Tuolumne w of Tioga Pass; Sierra Nevada, Yosemite National Park, Gaylor Lakes 3200 Comment
  UCD45029  Quercus agrifolia Herbert L. Mason 1929-10-13 5501 a San Luis Obispo 2 1/2 mi. north of Cambria, San Luis Obispo County. Comment
  UC1076208  Quercus berberidifolia H. L. Mason 1926-1-1 2597 Lake Blue Lakes Comment
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Jun 1 2008
  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
  UCD45931  Quercus durata var. durata Herbert L. Mason 1929-10-20 5509 Alameda Cedar Mountain. Comment
  UC1083146  Quercus lobata Herbert L. Mason 1924-10-8 1109 San Mateo between Stanford University and Jasper Ridge Comment
Read comments
Sep 19 2011
  UC1179011  Quercus lobata Herbert L. Mason 1947-3-29 13153 Colusa ca 3 mi ne Colusa (along Butte Creek); Butte Sink, Butte Creek Comment
  UCD54402  Quercus lobata Herbert L. Mason 1929-10-12 5489 San Luis Obispo San Luis Obispo Co: 5.2 miles from Atascadero. Comment
  UCD47132  Quercus parvula var. shrevei Herbert L. Mason 1932-7-31 7126 Santa Cruz Waddell Creek, Santa Cruz County. Comment
  UCSB1234  Quercus sadleriana Mason, Herbert 1950-7-16 Siskiyou Road from Happy Camp, California, to Waldo, Oregon Comment
  UC1076081  Quercus wislizeni H. L. Mason 1924-10-12 1111 Marin s slope Mt. Tamalpais Comment
  CAS-BOT-BC362884  Raillardella scaposa Herbert L. Mason 1938-7-28 12028 Tuolumne Sierra Nevada, Yosemite National Park. Macomb Ridge east of Tilden Lake 3048 Comment
  POM269630  Ranunculus alismifolius var. alismellus H. L. Mason 1926-5-30 3327 El Dorado Kit Carson Pass. 2622 Comment
  UC1101364  Ranunculus aquatilis var. capillaceus Herbert L. Mason and Verne Grant 1947-7-11 13370 Modoc irrigation ditch by Jones' Lane (off Hwy 395, s of Alturas) Comment
  UC1101372  Ranunculus aquatilis var. capillaceus Herbert L. Mason 1946-7-24 12940 Marin near Double Point; Lake Ranch Comment
  UCD95857  Ranunculus aquatilis var. diffusus Herbert L. Mason; Verne Grant 1947-7-11 13370 Modoc by Jones' Lane, off Highway 395, south of Alturas. 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
  UC1051435  Ranunculus cymbalaria var. saximontanus Herbert L. Mason 1955-8-14 14661 Modoc n Rim Rock Valley Reservoir; Drift Fence Reservoir Comment
  UC634983  Ranunculus hebecarpus H. L. Mason 1926-4-11 2847 Alameda Cedar Mountain and Rancho Repose Mount Hamilton Range Comment
  POM269863  Ranunculus lobbii H. L. Mason 1929-4-26 5223 Marin Near Olema along San Andreas Fault Rift Comment
  UC634965  Ranunculus muricatus H. L. Mason 1928-5-3 4462 Amador w Ione; Jackson Creek bridge Comment
  UC635095  Ranunculus occidentalis H. L. Mason 1923-7-19 615 Tuolumne Mather Comment
  UC635099  Ranunculus occidentalis H. L. Mason 1930-6-1 5614 Mendocino Cloverdale to Fort Bragg (via river); Navarro River Comment
  POM285053  Ranunculus occidentalis var. ultramontanus H. L. Mason 1952-7-16 14353 Nevada Sage Hen Creek, 1 mile W of University of California Trout Laboratory. 1982 Comment
  UC1191444  Ranunculus sceleratus Herbert L. Mason 1948-6-29 13578 Merced 5 mi n Volta; San Joaquin Valley Comment
  POM313443  Ranunculus sceleratus H. L. Mason 1937-6-21 11547 Contra Costa 0.5 mile from the S end of Borden Hwy and 1.5 miles W of Byron. Comment
  UC1178884  Reseda luteola Herbert L. Mason 1942-9-29 12558 Napa 2 mi n of Calistoga (Napa River); Napa River Comment
  UC672654  Rhamnus californica Herbert L. Mason Nov 1931 5886 Monterey road between Monterey and Carmel Comment
  UC570984  Rhamnus californica subsp. californica Herbert L. Mason 1926-2-21 2648 Marin along road from Inverness to Point Reyes Comment
  UC570986  Rhamnus californica subsp. californica Herbert L. Mason 1928-4-8 4293 Sonoma 2 mi n Fort Ross Comment
  UC912385  Rhamnus californica subsp. californica Herbert L. Mason 1930-10-25 5742 Monterey Headwaters of Arroyo Seco Santa Lucia Mountains Comment
  CAS-BOT-BC59912  Rhamnus crocea H. L. Mason 1921-5-7 s.n. Monterey Rancho del Monte, Carmel River. Comment
  JROH3556  Rhamnus crocea H. L. Mason 1921-3-9 s.n. San Mateo Jasper Ridge Biological Preserve, Stanford University Comment
  UC570994  Rhamnus crocea Herbert L. Mason 1923-6-14 416 Santa Barbara Gaviota Pass Comment
Read comments
Apr 2 2007
  UC570988  Rhamnus ilicifolia Herbert L. Mason 1923-6-16 435 Santa Barbara La Cumbre Peak Comment
  UC570992  Rhamnus ilicifolia Herbert L. Mason 1929-3-23 5085 Tulare 3 mi above Springville; Middle Tule River Comment
  UC570996  Rhamnus purshiana Herbert L. Mason 1924-6-19 1071 Plumas along stream running n into Bear Lake Bear Lake Comment
  UC571001  Rhamnus rubra Herbert L. Mason 1925-7-16 2172 Tuolumne Mather 1432 Comment
  GH363032  Rhododendron columbianum H. L. Mason 1924-6-19 1075 Unknown Along margins of Bear Lakes Comment
  UC571038  Rhododendron macrophyllum H. L. Mason June 1930 5632 Mendocino Fort Bragg Comment
  UC571072  Rhododendron occidentale H. L. Mason 1925-6-29 2137 Tuolumne Lake Eleanor 1432 Comment
  UC634740  Rhododendron occidentale H. L. Mason 1925-6-29 2137 Tuolumne Lake Eleanor 1432 Comment
  UC634741  Rhododendron occidentale H. L. Mason 1923-7-20 625 Tuolumne Hog Ranch, Middle Fork Hog Ranch; , Middle Fork Comment
  UC635196  Rhus integrifolia H. L. Mason 1923-6-17 473 Ventura 9 mi n Ventura (Ventura Bluffs); Ventura Bluffs Comment
  UC635192  Rhus ovata H. L. Mason 1923-6-16 430 Santa Barbara Rattlesnake Canyon between Santa Barbara and La Combre Peak; Rattlesnake Canyon Comment
  CAS-BOT-BC111865  Rhynchospora alba Herbert L. Mason 1946-7-4 12880 Sonoma Pitkin Marsh; between Santa Rosa and Forestville. 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
  UC570813  Ribes amarum Herbert L. Mason 1929-3-3 5038 Monterey 4 mi e Jamesburg Post Office; Santa Lucia Mts. Comment
  CAS-BOT-BC173047  Ribes divaricatum var. pubiflorum H. L. Mason 1921-5-7 s.n. Monterey Rancho del Monte, Carmel River Comment
  CAS-BOT-BC168991  Ribes divaricatum var. pubiflorum H. L. Mason 1921-3-9 s.n. Santa Clara San Francisquito Creek, foot of Jasper Ridge 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
  UC1191514  Ribes menziesii Herbert L. Mason 1946-7-24 12920 Marin 2.8 mi n Lake Ranch (first lake s of Bear Valley) Comment
  GH380490  Ribes menziesii var. leptosmum H. L. Mason 1926-2-21 2661 Unknown Point Reyes Comment
  UC570979  Ribes montigenum H. L. Mason 1922-7-26 333 Tuolumne Porcupine Flat Sierra Nevada Mountains, Yosemite National Park 2133 Comment
  UC570970  Ribes roezlii Herbert L. Mason 1925-7-15 2159 Tuolumne Mather Comment
  UC570971  Ribes roezlii Herbert L. Mason 1925-7-15 2158 Tuolumne Mather Comment
  GH380896  Ribes speciosum H. L. Mason 1929-3-1 5018 Unknown Twenty-five miles up Carmel River on the Jamesburg to Arroyo Seco Road Comment
  UC1060662  Rigiopappus leptocladus Herbert L. Mason 1957-5-11 14731 San Benito Two-three miles e Hernandez Comment
  UC566727  Rigiopappus leptocladus H. L. Mason 1928-5-6 4566 Alameda Cedar Mountain Mount Hamilton Range Comment
  UC965558  Rorippa curvisiliqua Herbert L. Mason 1952-7-10 14315 Nevada in meadow one mi w University of California Trout Laboratory (Sage Hen Creek); Sierra Nevada, Sage Hen Creek 1981 Comment
  UC555674  Rosa californica H. L. Mason 1929-10-12 5498 San Luis Obispo 10 mi w Atascadero Comment
  UC555647  Rosa gymnocarpa Herbert L. Mason 1924-11-23 1161 Contra Costa Cashion Creek Las Trampas Ridge Comment
  UC555638  Rosa pinetorum Herbert L. Mason 1927-10-4 4128 Santa Cruz mouth of Waddell Creek Ano Nuevo Pt. Comment
  UC555667  Rosa woodsii var. glabrata Herbert L. Mason 1926-4-28 3090 San Bernardino Box S Springs Mojave Desert Comment
  UC1191554  Rotala indica Herbert L. Mason 1946-9-27 13137 Butte 2 mi w Biggs; Butte Sink Comment
  SBBG30032  Rotala ramosior H. L. Mason 1936-7-15 11256 Tuolumne 0.5 mi W of Mather 1371 Comment
  UC555681  Rubus laciniatus H. L. Mason 1925-12-12 Alameda San Leandro Canyon Oakland Hills, San Leandro Canyon Comment
  CAS-BOT-BC147189  Rubus parviflorus H. L. Mason 1921-5-14 s.n. Alameda [Haywards] Hayward Comment
  CAS-BOT-BC147257  Rubus parviflorus H. L. Mason 1917-4-28 s.n. Marin Mt. Tamalpais Comment
  UC1076531  Rudbeckia californica Herbert L. Mason 1937-7-21 11555 Tuolumne w of Hetch Hetchy; Sierra Nevada, Yosemite National Park, Miguel Meadow 1584 Comment
  UC1191270  Rumex maritimus Herbert L. Mason 1947-8-13 13517 Modoc n of Canby (ne side of F reservoir) 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
  UC641783  Rumex salicifolius var. denticulatus H. L. Mason 1936-7-31 11476 Mono near Saddlebag Lake; Sierra Nevada, Tioga Crest 3078 Comment
  UC1101209  Rumex salicifolius var. lacustris Herbert L. Mason and Verne Grant 1947-7-10 13336 Modoc 2 mi e Alturas; Dorris Reservoir 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
  UC1101231  Rumex salicifolius var. salicifolius Herbert L. Mason 1945-8-16 12652 Solano near Suisun Bay; Grizzly Island Comment
  UC1191287  Rumex salicifolius var. salicifolius Herbert L. Mason 1932-7-31 7135 Santa Cruz Mouth of Waddell Creek Comment
  UC1191281  Rumex salicifolius var. transitorius Herbert L. Mason and Verne Grant 1946-8-28 13080 San Mateo n of San Francisco county prison Comment
  UC1191282  Rumex salicifolius var. transitorius Herbert L. Mason and Verne Grant 1947-5-14 13233 Solano Cordelia Creek Suisun Marsh Comment
  UCD138310  Ruppia cirrhosa Herbert L. Mason 1923-10-6 770 Solano Suisun Marsh. Comment
  UC1100031  Ruppia maritima Herbert L. Mason 1945-7-20 Monterey Elkhorn Slough Comment
  CAS-BOT-BC454144  Ruppia maritima Herbert L. Mason 1945-7-20 s.n. Monterey Elkhorn Slough Comment
  UC1051438  Sagittaria cuneata Herbert L. Mason 1955-8-13 14647 a Lassen Willow Creek Valley Comment
  UC935740  Sagittaria cuneata Herbert L. Mason 1945-6-29 12623 Lake Boggs Lake at base Mount Hanna; Boggs Lake at base of Mount Hanna Comment
  UC935754  Sagittaria cuneata Herbert L. Mason 1945-8-24 12675 Lake e shore Lower Lake; e shore Lower Lake Comment
  UC935797  Sagittaria cuneata Herbert L. Mason 1948-7-18 13607 Siskiyou Grass Lake Comment
  POM313041  Sagittaria cuneata H. L. Mason 1933-9-2 7285 Alpine Silver Lake, Sierra Nevada. Comment
  CAS-BOT-BC445727  Sagittaria latifolia Herbert L. Mason; Verne Grant 1946-8-14 13040 Butte Butte Sink Comment
  UC935752  Sagittaria latifolia Herbert L. Mason and S. Galen Smith 1948-8-19 8379 Merced 1 mi w Snelling Comment
  UC935769  Sagittaria latifolia Herbert L. Mason and S. Galen Smith 1948-8-9 8299 Merced 1 mi w Los Banos; w of Los Banos Comment
  UCD138019  Sagittaria longiloba Herbert L. Mason; S. Galen Smith 1948-8-10 8313 Fresno adjacent to Mendota canal, southwest of Firebaugh. 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
  UCD138038  Sagittaria montevidensis subsp. calycina Herbert L. Mason; S. Galen Smith 1948-8-11 8322 Merced Crane Ranch, south of junction of Merced and San Joaquin Rivers. Comment
  CAS-BOT-BC267086  Sagittaria sanfordii Herbert L. Mason 1946-8-8 13001 Butte Butte Sink. West Gridley road, 1 mile W of Gridley - Pennington highway Comment
  UCD138071  Sagittaria sanfordii Herbert L. Mason; Verne Grant 1946-8-8 13001 Butte West Gridley road one mile west of Gridley - Pennington Highway. Comment
  A401598  Salazaria mexicana H. L. Mason 1926-4-26 2981 Unknown Vincent to Palmdale Comment
  UC1191409  Salicornia europaea Herbert L. Mason and Malcolm A. Nobs 1948-12-11 713 San Mateo Highway 101, near shore of bay, at Whipple Avenue intersection, Redwood City Redwood City Comment
  UCD99148  Salicornia pacifica H. L. Mason; Malcolm A. Nobs 1948-12-11 714 Santa Clara at north base of Pacheco Pass. Comment
  UC1191406  Salicornia virginica Herbert L. Mason and Malcolm A. Nobs 1948-12-11 714 Merced n base Pacheco Pass Comment
Read comments
Sep 12 2008
  GH382384  Salix arctica H. L. Mason 1936-7-23 11300 Unknown alpine slopes Mount Conness, Sierra Nevada 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
  UC634548  Salix exigua var. hindsiana H. L. Mason 1926-3-14 2719 Napa along stream in grove Mt. St. Helena Comment
  UC965627  Salix geyeriana Herbert L. Mason 1952-7-18 14405 Nevada upstream from U. C. Trout Laboratory (Sage Hen Creek); Sierra Nevada 1981 Comment
  UC634544  Salix laevigata H. L. Mason 1928-3-10 4171 Riverside Snow Creek Colorado Desert, White Water River Valley, Snow Creek Comment
  UC634550  Salix melanopsis H. L. Mason 1923-6-23 552 Monterey Carmel R. Comment
  UC641703  Salix petrophila H. L. Mason 1936-7-23 11300 Tuolumne Mt. Conness alpine slopes Mt. Conness; Sierra Nevada Comment
  UC634542  Salix scouleriana H. L. Mason November 1931 5878 a Monterey rd. between Monterey and Carmel Comment
  UC909119  Saltugilia splendens subsp. splendens Herbert L. Mason 1926-4-27 3037 Los Angeles Rock Creek San Gabriel Mts., Rock Creek Comment
  UC581136  Salvia dorrii var. pilosa H. L. Mason 1934-3-28 8000 Kern near Onyx; Kern River Canyon Comment
  UC632848  Salvia leucophylla H. L. Mason 1936-3-7 10998 Santa Barbara Point Sal Comment
  CAS-BOT-BC221097  Salvia sonomensis Herbert L. Mason 1932-4-24 s.n. Amador Three mi. so. of Ione Comment
  UCLA69735  Salvia sonomensis H. L. Mason 1930-10-25 5748 Monterey Headwaters of Arroyo Seco; Santa Lucia Mountains Comment
  UCLA69737  Salvia sonomensis H. L. Mason 1929-4-29 5252 Lake between Kelseyville and Lower Lake Comment
  UC1076398  Sambucus mexicana Herbert L. Mason 1925-6-27 2128 Tuolumne Mather Comment
  UC912449  Sambucus nigra subsp. caerulea Herbert L. Mason 1923-6-16 461 Santa Barbara La Cumbre Peak Comment
  UC912452  Sambucus racemosa var. racemosa Herbert L. Mason 1924-11-16 1156 Marin lowlands back of dunes; Willow Camp Comment
  UC635705  Samolus parviflorus H. L. Mason September 1930 5904 Monterey Elkhorn Slough between Watsonville and Castroville; Elkhorn Slough Comment
  UC566879  Sanicula bipinnatifida H. L. Mason 1926-4-30 3139 San Diego Henshaw Dam Comment
  UC566882  Sanicula bipinnatifida H. L. Mason 1926-4-10 2811 a Alameda Mount Hamilton Range, Cedar Mountain via Arroyo Mocho Cedar Mountain; Mount Hamilton Range, Cedar Mountain Comment
  UC566884  Sanicula bipinnatifida H. L. Mason 1926-3-17 2743 a Alameda Berkeley Hills, Strawberry Canyon Strawberry Canyon; Berkeley Hills, Strawberry Canyon Comment
  UC566825  Sanicula graveolens H. L. Mason 1930-7-1 5702 Calaveras near Hermit Springs (Sierra Nevada Mountains, Blue Creek); Sierra Nevada Mountains, Blue Creek Comment
  UC753535  Sanicula graveolens Herbert L. Mason 1946-6-8 12860 Santa Barbara San Rafael Range, Big Pine Mountains Big Pine Mountains; San Rafael Range, Big Pine Mountains 1981 Comment
  JEPS948  Sanicula tuberosa H. L. Mason 1926-5-31 3357 Calaveras 1 1/2 mi w of Calaveras Grove (1 1/2 mi w of Calaveras Big Trees) Comment
  UC566831  Sanicula tuberosa H. L. Mason 1928-5-4 4520 El Dorado Rose Springs (Eggar's) Rose Springs Comment
  UC566839  Sanicula tuberosa Herbert L. Mason 1926-5-30 3325 El Dorado along road from Tahoe to Kit Carson Pass Kit Carson Pass 1889 Comment
  UC566888  Sanicula tuberosa Herbert L. Mason 1926-5-29 3293 Nevada 3 mi w of Cisco (Crystal Lake); Crystal Lake 1767 Comment
  JEPS47521  Saxifraga integrifolia Herbert L. Mason 1926-3-21 2767 Lake about 2 mi s of Middletown (near St. Helena Creek) Comment
  UC635130  Saxifraga integrifolia H. L. Mason 1931-3-7 5808 Sonoma 12 mi w of Santa Rosa (Vine Hill School); Vine Hill School Comment
  UC642736  Saxifraga odontoloma H. L. Mason 1936-7-31 11475 Mono Tioga Crest near Saddlebag Lake (Tioga Pass region); Sierra Nevada, , Tioga Crest 3200 Comment
  UC1081521  Saxifraga oregana Herbert L. Mason 1936-7-12 11236 Mariposa Glacier Point, Peregoy Meadow; Sierra Nevada, Yosemite National Park, Glacier Point, Perego 2255 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-BC245130  Schoenoplectus americanus Herbert Louis Mason 1947-8-11 13499 Modoc Hwy 81, W margin of Lower Lake, near boundary with Lassen Co. Comment
  POM313085  Schoenoplectus californicus H. L. Mason, Verne Grant 1946-7-5 12904 Solano In Lake Chabot water reservoir just north of Vallejo. Comment
  POM313045  Schoenoplectus fluviatilis H. L. Mason 1945-8-24 12673 Lake East shore, Lower Lake. Comment
  UC1100679  Scirpus acutus var. occidentalis Herbert L. Mason, Verne Grant 1946-7-5 12906 Solano in water in Lake Chabot water reservoir just n Vallejo; Lake Chabot water reservoir, n of Vallejo Comment
  UC1100871  Scirpus americanus Herbert L. Mason 1946-6-9 12869 San Luis Obispo Dune Lakes between Oceano and mouth Santa Maria River; Dune Lakes, between Oceano and mouth Santa Maria River Comment
  UC1100872  Scirpus americanus Herbert L. Mason, Verne Grant 1946-9-5 13114 Colusa Road to Lake County 1.6 mi w Williams; w of Williams Comment
  UC1100790  Scirpus californicus Herbert L. Mason, S. Galen Smith 1948-8-9 8272 Santa Clara 5 mi e of Gilroy (at w base of Pacheco Pass); Pacheco Pass Comment
  UC1100794  Scirpus californicus Herbert L. Mason, Verne Grant 1947-6-26 13268 Solano Suisun Marsh Cordelia Slough, Suisun Marsh Comment
  UC1100940  Scirpus californicus Herbert L. Mason 1946-6-9 12868 San Luis Obispo betwen Oceano and mouth Santa Maria River (Dune Lakes); , between Oceano and mouth Santa Maria River Comment
  UC1102979  Scirpus cernuus var. californicus Herbert L. Mason 1958-8-9 14863 Tuolumne w Hetch Hetchy Dam (Swamp Lake, Yosemite National Park); Sierra Nevada, Yosemite National Park, Swamp Lake 1584 Comment
  UC1100859  Scirpus maritimus Herbert L. Mason 1945-8-16 12660 a Solano near Suisun Bay; Grizzly Island, near Suisun Bay Comment
  UC1100860  Scirpus maritimus Herbert L. Mason 1945-8-16 12660 Solano near Suisun Bay; Grizzly Island, near Suisun Bay Comment
  UC1100913  Scirpus maritimus Herbert L. Mason 1948-9-4 13650 Mono Rush Creek , Rush Creek (Mono Lake) 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
  UC1100924  Scirpus maritimus Herbert L. Mason, Verne Grant 1946-8-6 12964 Colusa four mi s Colusa (w side Sacramento River, pond on Colusa-Marysville Highway); w side Sacramento River, s of Colusa Comment
  UC1100838  Scirpus microcarpus Herbert L. Mason, Verne Grant 1946-8-28 13093 San Mateo on Highway 5 one mi w of San Bruno between Santa Cruz and Daly City; w of San Bruno Comment
  UC1100837  Scirpus microcarpus Herbert L. Mason, Verne Grant 1947-7-13 13346 Modoc Joseph Creek on Highway 395 n Davis Creek (e side Goose Lake); , Joseph Creek, n of Davis Creek Comment
  UC1100884  Scirpus nevadensis Herbert L. Mason 1948-9-4 13662 Mono Rush Creek Mono Lake, Rush Creek Comment
  UC1100803  Scirpus pungens Herbert L. Mason 1948-9-4 13668 Mono Rush Creek , Rush Creek (Mono Lake) Comment
  UC1100806  Scirpus pungens Herbert L. Mason 1948-9-4 13663 Mono Rush Creek , Rush Creek (Mono Lake) Comment
  UC1100809  Scirpus pungens Herbert L. Mason 1947-8-15 13544 Modoc e side Goose Lake (mouth of Crane Creek, on Willow Ranch) Comment
  UC1212208  Sclerolinon digynum Herbert L. Mason 1939-7-11 12119 Tuolumne 0.5 mi below Swamp Lake (nw part of Yosemite National Park); Yosemite National Park 1554 Comment
  POM313136  Scribneria bolanderi H. L. Mason, Malcom A. Nobs, S. Galen Smith 1949-5-29 759 Lassen On Great Northern Railroad , Highway 299, Nubeiber. Comment
  UC565461  Scutellaria californica Herbert L. Mason 1926-5-26 3274 Placer 5 mi above Auburn Comment
  UC1076034  Scutellaria siphocampyloides Herbert L. Mason 1947-5-15 14752 Shasta 1 mi s of Boulder Creek (between La Moine and Dunsmuir) Comment
  UC1111605  Scutellaria tuberosa Herbert L. Mason 1938-5-10 11811 Tulare sw of Badger (Auckland Ranch); General Grant National Park, Auckland Ranch Comment
  UC1713661  Scutellaria tuberosa Herbert L. Mason 1931-3-13 5815 Alameda Lake Chabot Comment
  UC565458  Scutellaria tuberosa Herbert L. Mason 1925-2-16 1251 Alameda ridge n of Mills College Comment
  CAS-BOT-BC417828  Sedella pentandra Herbert L. Mason 1940-5-5 12278 Merced North Twin Peak (Diablo Range), N Fork of Los Banos Creek, Inner South Coast Range Comment
  CAS-BOT-BC417829  Sedella pentandra H. L. Mason 1935-5-9 s.n. Santa Clara Tributary to Sulphur Springs Creek, San Antonio Valley, Mt. Hamilton Range 609 Comment
  SBBG30053  Sedella pumila H. L. Mason 1941-4-6 12409 Butte 3 mi S of Chico near jct of rd to Paradise 91 Comment
  SBBG70348  Sedella pumila H. L. Mason 1941-4-6 12409 Butte 3 mi S of Chico near jct of rd to Paradise 91 Comment
  GH376752  Sedum rosea subsp. integrifolium H. L. Mason 1926-5-30 3313 a Unknown Hill slope back of Emerald Bay, above falls Comment
  CAS-BOT-BC59062  Sedum spathulifolium H. L. Mason 1921-7-1 s.n. San Mateo Pescadero Creek Comment
  UC1076450  Selaginella bigelovii Herbert L. Mason 1926-4-26 2941 Los Angeles upper rd. Pacoima Wash; San Gabriel Mts. Comment
  UC1076336  Selaginella wallacei Herbert L. Mason 1925-12-31 2565 Lake Bartlett Mt. road Comment
  UC641693  Selaginella watsonii H. L. Mason 1936-7-24 11354 Tuolumne White Mt.; Sierra Nevada, Mt. Conness Range Comment
  UC566627  Senecio aronicoides Herbert L. Mason 1924-4-20 900 Alameda Berkeley Hills Berkeley, Berkeley Hills Comment
  UC1093654  Senecio californicus Herbert L. Mason 1957-5-11 14740 San Benito 4-5 mi e Hernandez; entrance to Clear Creek Canyon Comment
  GH427714  Senecio flaccidus var. monoensis H. L. Mason 1925-4-25 3088 Unknown Box S. Springs Comment
  UC714453  Senecio fremontii var. occidentalis H. L. Mason 1936-7-30 11447 Tuolumne Shepherds Crest Sierra Nevada, Mount Conness Range Comment
  UC566633  Senecio glomeratus H. L. Mason 1928-7-10 4884 Sonoma Jenner Comment
  UC1081541  Senecio hydrophilus Herbert L. Mason 1936-8-1 11495 Mono Mono Lake Sierra Nevada, Mono Lake 1981 Comment
  UC566637  Senecio jacobaea H. L. Mason 1928-8-26 4934 Mendocino Pudding Creek slough Pudding Creek Comment
  UC1076532  Sericocarpus oregonensis subsp. californicus Herbert L. Mason 1937-7-21 11556 Tuolumne west of, Miguel Meadow Hetch Hetchy; Yosemite National Park, Miguel Meadow 1584 Comment
  UC1100567  Setaria parviflora Herbert L. Mason and S. Galen Smith 1948-7-30 8262 Stanislaus ca. 7 mi. s. Modesto (on Crow's Landing Rd.) Comment
  CAS-BOT-BC243639  Setaria pumila Herbert L. Mason; Verne Grant 1946-9-12 13127 San Joaquin Borden Highway near Dagget Road, Roberts Island Comment
  RSA313135  Setaria pumila H. L. Mason 1945-9-18 12712 Sutter Along drainage ditches, Pennington Toad between Live Oak and Pennington Comment
  UC1191168  Sidalcea glaucescens Herbert L. Mason 1926-5-31 3355 Calaveras 1.2 mi sw Big Trees (on old road) Comment
  GH420707  Sidalcea hartwegii H. L. Mason 1932-4-24 Unknown Near base of Pilot Hill about 11 mi. E. of Folsom Comment
  POM199432  Sidalcea hartwegii H. L. Mason 1932-4-24 s.n. Sacramento Near base of Pilot Hill about 11 miles E of Folsom Comment
  UC1191165  Sidalcea hirsuta Herbert L. Mason 1928-5-3 4451 San Joaquin 4 mi n Clements; n of Clements 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
  SEINET187227  Silene Herbert L. Mason 1923-6-18 499 Ventura Timbes Canyon Topa Topa Mt. Comment
Read comments
Oct 18 2018
  UC640587  Silene bridgesii H. L. Mason 1925-7-10 2154 Tuolumne Hog Ranch Sierra Nevada Mountains, Yosemite National Park (Mather, Yosemite National Park) Comment
  CAS-BOT-BC386879  Silene gallica H. L. Mason 1921-5-1 s.n. Alameda Hills back of Haywards. Comment
  UC936207  Silene sargentii H. L. Mason 1936-7-28 11423 Mono Mount Dana Plateau Comment
  UC592177  Sium suave H. L. Mason 1929-9-21 5444 San Joaquin Holt Comment
  POM312585  Solanum americanum H. L. Mason, Verne Grant 1947-6-26 13259 Solano Cordelia Slough, Suisun Marsh. Comment
  UC1191782  Solanum americanum Herbert L. Mason, Verne Grant 1947-6-26 13259 Solano Cordelia Slough, Suisun Marsh Cordelia Slough; , Suisun Marsh Comment
  UC570694  Solanum americanum H. L. Mason 1929-11-27 4150 Santa Barbara Carpenteria Comment
  UC558471  Solanum mauritianum Herbert L. Mason 1936-8-28 Alameda Court of Life Sciences Building University of California, Berkeley. 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
  UC921145  Solanum umbelliferum Herbert L. Mason 1936-5-15 11111 Mariposa 3 mi above Coulterville Comment
  UC672228  Solidago spathulata H. L. Mason 1934-10-19 1117 San Francisco San Francisco , Merced Lake (Merced Lake) Comment
  CAS-BOT-BC54285  Solidago spectabilis Herbert Louis Mason 1947-8-9 13459 Modoc Ingalls Swamp, N of Big Sage Reservoir. Comment
  UC912199  Soliva sessilis Herbert L. Mason 1932-4-25 6987 Amador hills above Ione Comment
  CAS-BOT-BC365876  Soliva sessilis H. L. Mason 1928-4-13 4315 Marin Hills north of San Rafael Comment
  UCD92752  Sorghum halepense H. L. Mason 1945-9-19 12723 Colusa 1 mile N of Colusa. Below causeway over Butte Sink spillway, E bank of Sacramento River. Comment
  POM312964  Sparganium angustifolium H. L. Mason 1945-9-7 12689 Mono Pond below Tioga Lake. Comment
  UC1099802  Sparganium erectum subsp. stoloniferum Herbert L. Mason and Verne Grant 1946-9-12 13124 San Joaquin about 6 mi s Stockton (on Borden Highway) Comment
Read comments
Sep 25 2008
  UC1099805  Sparganium erectum subsp. stoloniferum Herbert L. Mason 1945-8-17 12662 Solano near Rio Vista (bank of Sacramento River); Sacramento River Comment
Read comments
Sep 25 2008
  SEINET3825672  Sparganium eurycarpum Herbert L. Mason, Verne Grant 1946-8-14 13016 Butte Canal near big pond on Sacramento Outing Club Butte Sink Comment
  UC1102973  Sparganium natans Herbert L. Mason 1958-8-9 14858 Tuolumne w side Hetch Hetchy Dam (Swamp Lake); Sierra Nevada, Yosemite National Park, Swamp Lake 1584 Comment
  CAS-BOT-BC390971  Spergularia marina Herbert L. Mason; Malcom A. Nobs 1949-4-27 730 Solano Suisun State Game Refuge Comment
  UC673574  Spiranthes stellata H. L. Mason 1923-7-25 649 Tuolumne Mather Spring Sierra Nevada Mountains, Yosemite National Park, Hog Ranch Comment
  CAS-BOT-BC534890  Spirodela polyrhiza Herbert L. Mason 1953-7-8 14561 Plumas Four miles northwest of Loyalton Comment
  CAS-BOT-BC534892  Spirodela polyrhiza Herbert L. Mason 1953-7-8 14561 Plumas Four miles northwest of Loyalton Comment
  CAS-BOT-BC534893  Spirodela polyrhiza Herbert L. Mason 1955-6-8 14630 Shasta In a marsh at the bridge, west edge of Fall River Mill Comment
  UC1191918  Stachys ajugoides var. ajugoides Herbert L. Mason, S. Galen Smith 1948-8-9 8275 Santa Clara about 8 mi e Gilroy Comment
  UC635184  Stachys ajugoides var. rigida Herbert L. Mason 1927-4-24 3700 San Mateo mouth San Gregorio Creek Comment
  UC635179  Stachys albens H. L. Mason 1925-7-16 2169 Tuolumne near Mather (Hog Ranch) Comment
  UCLA71370  Stachys bullata Herbert L. Mason 1927-4-24 3700 San Mateo mouth San Gregorio Creek Comment
  UC635186  Stachys chamissonis H. L. Mason June 1930 5652 Sonoma mouth Gualala River Comment
  UC635699  Stachys chamissonis H. L. Mason 1924-10-19 1122 San Francisco Merced Lake San Francisco Comment
  UC936170  Stellaria calycantha Herbert L. Mason 1936-7-28 11419 Mono Mount Dana Plateau Comment
  UC965633  Stellaria longipes var. longipes Herbert L. Mason 1952-7-16 14367 Nevada 1 mi w Univ. of Calif. Trout Laboratory (Sage Hen Creek); Sierra Nevada, Sage Hen Creek 1981 Comment
  YM-YOSE65590  Stenophyllus capillaris H. L. Mason 1938-7-13 11946 Mariposa BASE OF EL CAPITAN. YOSEMITE VALLEY 1226 Comment
  JEPS36835  Stephanomeria cichoriacea Herbert L. Mason 1927-9-23 4082 Santa Barbara canyon back of Prisoners Harbor; Santa Cruz Island Comment
  UC565505  Stephanomeria cichoriacea H. L. Mason 1927-9-23 4082 Santa Barbara canyon back of Prisoner's Harbor; Santa Cruz Island Comment
  UC565522  Stephanomeria virgata subsp. pleurocarpa Herbert L. Mason 1926-7-27 2176 Tuolumne Mather Comment
  UC570782  Stillingia spinulosa H. L. Mason 1928-3-10 4184 Riverside Whitewater River Comment
  GH379988  Streptanthus breweri H. L. Mason 1952-6-19 14300 Unknown between Fouts Springs and Red Bridge Public Camp, Mendocino National Forest Comment
  UC1178913  Streptanthus breweri var. breweri Herbert L. Mason 1940-5-22 12308 a Lake ridge 3 mi e Middletown Comment
  CAS-BOT-BC87112  Streptanthus glandulosus subsp. glandulosus H. L. Mason 1938-5-1 11747 Lake Bartlett Mountain. 4 miles from Lucerne. Comment
  UC592151  Streptanthus hispidus H. L. Mason 1929-3-29 5120 Contra Costa Mount Diablo 762 Comment
  GH422251  Streptanthus polygaloides H. L. Mason 1959-5-24 14899 Unknown in canyon of north fork of the Yuba River, exactly opposite Goodyears Bar (above north bank of river) 853 Comment
  POM257207  Streptanthus polygaloides H. L. Mason 11118 Mariposa Summit of road between Coulterville and Bagby. 701 Comment
  UC629717  Streptanthus polygaloides H. L. Mason May 15 1936-May 16 1936 11118 Mariposa summit of road between Coulterville and Bagby 701 Comment
  UC592144  Streptanthus tortuosus Herbert L. Mason 1925-7-9 2151 Tuolumne Mather 1432 Comment
  UC592159  Streptanthus tortuosus var. orbiculatus Herbert L. Mason 1926-5-30 3322 El Dorado near road to Fallen Leaf Lake; Lake Tahoe Comment
  CAS-BOT-BC376019  Stylocline gnaphaloides H. L. Mason 1933-4-22 7214 Monterey Pajaro Hills Comment
  UC581147  Stylocline gnaphaloides H. L. Mason 1935-3-31 8255 Fresno near Kett Station (e of Fresno) Comment
  UC581172  Stylocline gnaphaloides H. L. Mason 1935-3-31 8250 San Luis Obispo Cholame Valley Comment
  UC581176  Stylocline intertexta H. L. Mason 1935-3-29 8233 San Bernardino w side of lake six mi s Trona; Mojave Desert, Searles Lake Comment
  SD46105  Stylocline psilocarphoides Herbert L. Mason 1952-4-7 14208 Riverside Palm Canyon, Palm Springs. Comment
  UC581180  Stylocline psilocarphoides H. L. Mason 1935-3-29 8194 San Bernardino se Stoddard's Well; Mojave Desert, Taylor Springs Comment
  UC581181  Stylocline psilocarphoides H. L. Mason 1935-3-29 8214 San Bernardino between Johannesburg and Searles Lake; Mojave Desert Comment
  UC635477  Stylomecon heterophylla H. L. Mason 1928-4-29 4442 Contra Costa s slope Mount Diablo; s slope of Mount Diablo, Sycamore Canyon Comment
  UC566951  Styrax officinalis var. redivivus H. L. Mason 1926-4-30 3138 San Diego San Luis Rey River four mi below Henshaw Dam; San Luis Rey River, below Henshaw Dam Comment
  CAS-BOT-BC64527  Styrax redivivus H. L. Mason 1926-4-30 3138 San Diego San Luis Rey River, 4 mi. below Henshaw Dam. Comment
  GH384820  Styrax redivivus H. L. Mason 1923-6-16 456 Unknown La Combre Peak, Santa Barbara, by way of Rattlesnake Canyon and La Combre Trail Comment
  GH384821  Styrax redivivus H. L. Mason 1931-5-9 5876 Unknown Pitt River Comment
  UC1051440  Suaeda calceoliformis Herbert L. Mason 1955-8-14 14649 Modoc s end Goose Lake Comment
  UC1076414  Symphoricarpos albus var. laevigatus Herbert L. Mason 1924-11-23 1158 Contra Costa Cashion Comment
  RSA55143  Symphoricarpos mollis S. C. Mason 1910-8-29 s.n. Santa Barbara San Marcoss Pass. Comment
  SEINET8061688  Symphoricarpos mollis S. C. Mason 1910-8-31 s.n. Santa Barbara N. Of Gaviota Pass. Comment
  UC1191852  Symphoricarpos rotundifolius var. rotundifolius Herbert L. Mason 1948-7-18 13619 Modoc Cedar Pass; Warner Mountains Comment
  UC1192069  Symphyotrichum bracteolatum Herbert L. Mason 1947-8-11 13494 Modoc on Highway 81, w margin of Lower Lake, near boundary betwn Lassen and Modoc Co. Lower 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
  UC1192206  Symphyotrichum spathulatum Herbert L. Mason 1947-8-8 13454 Modoc nw of, (Ingalls Swamp, n of big Sage Reservoir) Alturas; Ingalls Sweamp Comment
  UC1191127  Tamarix ramosissima Herbert L. Mason 1952-4-9 14227 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
  UC1191747  Taraxia tanacetifolia Herbert L. Mason 1947-8-13 13523 Modoc n Canby (ne side of reservoir); F Reservoir Comment
  UC1191748  Taraxia tanacetifolia Herbert L. Mason and Verne Grant 1947-7-10 13327 Modoc 2 mi e Alturas; Dorris Reservoir Comment
  UC566896  Tauschia hartwegii H. L. Mason 1926-5-28 3266 Placer hills near Auburn (Auburn) Comment
  UC566898  Tauschia hartwegii H. L. Mason 1926-5-28 3268 Placer five mi above Auburn Comment
  UC635036  Tetragonia tetragonoides H. L. Mason 1928-9-2 4942 Alameda Bay Farm Island Comment
  UC1083126  Thalictrum fendleri Herbert L. Mason 1936-7-27 11367 Tuolumne w Tioga Pass; Sierra Nevada, Yosemite National Park, Gaylor Lakes 3200 Comment
  UC1056454  Thysanocarpus curvipes Herbert L. Mason 1936-3-20 11011 Tuolumne three mi above Tuolumne Comment
  RSA28578  Thysanocarpus radians H. L. Mason 1934-3-25 7933 Sacramento Keithly ranch, Rio Linda. 30 Comment
  UC570910  Tiarella trifoliata var. unifoliata H. L. Mason 1928-7-11 4888 Sonoma Canyon 2 mi n Fort Ross; n of Fort Ross Comment
  UC1081527  Tiquilia nuttallii Herbert L. Mason 1936-8-1 11500 Mono 3 mi. n. Mono Lake; Sierra Nevada, Yosemite Nat'l Park 2072 Comment
  UC1191833  Tiquilia nuttallii Herbert L. Mason 1948-9-5 13680 Mono Mono craters Comment
  UC672568  Tonella tenella H. L. Mason 1926-3-21 2769 Lake Middletown to Mt. St. Helena (via Toll House Canyon); Toll House Canyon Comment
  UC566830  Torilis nodosa Herbert L. Mason 1926-5-24 3221 Alameda University of California Berkeley, campus Comment
  UC1083326  Torreya californica Herbert L. Mason 1926-3-6 2684 Marin Mt. Tamalpais Comment
  CAS-BOT-BC519584  Triantha occidentalis subsp. occidentalis Herbert L. Mason 1950-7-15 14052 Trinity Summit of grade, Scott Mountain Comment
  UC570719  Trichostema lanatum H. L. Mason 1923-6-16 438 Santa Barbara La Combre peak via La Combre Trail and Rattlesnake Canyon Comment
  UCD125875  Trichostema laxum Herbert L. Mason 1946-7-4 12897 Sonoma 2 miles east of Occidental. Comment
  UC555616  Trifolium albopurpureum var. albopurpureum H. L. Mason 1926-4-10 Alameda Arroyo Machp Canyon Cedar Mtn Comment
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Jan 24 2013
  UC555446  Trifolium barbigerum H. L. Mason 1931-4-12 5843 Sonoma 1.5 mi w Fulton Comment
  UC555605  Trifolium barbigerum H. L. Mason 1928-5-4 4502 El Dorado Shingle Springs Comment
  UC1076192  Trifolium barbigerum Herbert L. Mason 1934-4-28 8095 Sonoma Hwy betw Healdsburg and Santa Rosa Comment
  UC1081548  Trifolium bolanderi Herbert L. Mason 1936-8-6 11518 Mariposa Peregoy Meadow Yosemite National Park (Glacir Point Rd) 2255 Comment
  UC1081547  Trifolium breweri Herbert L. Mason 1936-8-6 11517 Mariposa Wawona Rd Sierra Nevada, Yosemite National Park Comment
  UC555598  Trifolium ciliolatum H. L. Mason 1928-4-26 4383 Contra Costa Berkeley-Oakland HIlls Comment
  UC555353  Trifolium depauperatum var. amplectens H. L. Mason 1928-4-25 4376 San Francisco Hunter's Point Comment
  UC555371  Trifolium depauperatum var. amplectens H. L. Mason 1929-4-7 5173 Stanislaus 6 mi w Oakdale Comment
  UC555370  Trifolium depauperatum var. truncatum H. L. Mason 1928-4-28 4439 Marin Tiburon Peninsula Comment
  POM312878  Trifolium eriocephalum subsp. eriocephalum H. L. Mason 1948-7-17 13601 Siskiyou Eastern Grass Lake, in forested hills Comment
  UC555455  Trifolium eriocephalum var. eriocephalum H. L. Mason 1931-5-9 5868 Siskiyou 5 mi n Yreka Comment
  UC555594  Trifolium fucatum H. L. Mason 1928-4-15 4351 Alameda e Moraga Ridge Comment
  UC555448  Trifolium gracilentum H. L. Mason 1929-3-31 5150 Contra Costa along San Joaquin River; Antioch Comment
  UC555450  Trifolium gracilentum H. L. Mason 1926-4-26 2951 Los Angeles 4 mi w Saugus Comment
  UC555459  Trifolium gracilentum H. L. Mason 1932-3-20 6844 Contra Costa Antioch sand hills Comment
  UC1195918  Trifolium longipes Herbert L. Mason 1958-8-9 14865 Tuolumne w Hetch Hetchy Dam (Swamp Lake); Sierra Nevada, Yosemite National Park 1584 Comment
  UC1111534  Trifolium longipes var. hansenii Herbert L. Mason 1936-8-6 11503 Mariposa Glacier Point Rd Sierra Nevada, Yosemite National Park, Paragoy Meadow 2255 Comment
  UC555600  Trifolium microcephalum Herbert L. Mason 1927-4-23 3679 San Mateo summit of rd from La Honda to Pescadero Creek Comment
  UC555609  Trifolium microdon H. L. Mason 1928-4-28 4406 Marin Tiburon peninsula Comment
  UC555612  Trifolium microdon H. L. Mason 1928-4-15 4347 Alameda e end of Moraga Ridge Moraga Ridge Comment
  UC555477  Trifolium oliganthum H. L. Mason 1929-4-7 5179 Stanislaus ca 10 mi above Oakdale; Sierra foothills Comment
  UC555614  Trifolium oliganthum H. L. Mason 1928-5-6 4560 Alameda Cedar Mtn Comment
  UC1179051  Trifolium variegatum Herbert L. Mason 1939-7-11 12118 Tuolumne 1/2 mi below Swamp Lake (w of Hetch Hetchy); Sierra Nevada, Yosemite National Park 1554 Comment
  UC555582  Trifolium willdenovii H. L. Mason 1928-4-13 4307 Contra Costa Richmond waterfront Comment
  UC555570  Trifolium wormskioldii H. L. Mason 1925-7-4 2145 Tuolumne Mather Sierra Nevada, Yosemite National Park Comment
  UC555571  Trifolium wormskioldii H. L. Mason 1928-4-17 4362 San Francisco s Colma (hills) Comment
  POM313027  Triglochin maritima H. L. Mason, Verne Grant 1947-7-12 13438 Modoc Corporation Ranch Headquarters, north 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
  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
  UC1108811  Trisetum spicatum Herbert L. Mason 1936-7-24 11342 Tuolumne White Mountain; Conness Range Comment
  UC1077074  Triteleia ixioides subsp. scabra Herbert L. Mason 1938-5-10 11818 Tulare near Auckland 457 Comment
  UC635732  Triteleia laxa H. L. Mason 1929-3-15 5062 Contra Costa about 5 mi from Brentwood (Marsh Creek Road) Comment
  CAS-BOT-BC526458  Triteleia laxa H. L. Mason 1917-4-28 s.n. Marin Mill Valley Comment
  UC634756  Triteleia lilacina H. L. Mason Apr 1930 5556 Calaveras hills w of San Andreas Comment
  UC1178972  Triteleia peduncularis Herbert L. Mason 1946-5-30 12809 Lake Indian Valley , Indian Valley (North Fork Cache Creek) Comment
  JEPS54271  Tropidocarpum capparideum Herbert L. Mason 1920-3-27 5115 Alameda fields behind Mountain House (Altamont Pass); Altamont Pass Comment
  UC673305  Tropidocarpum gracile H. L. Mason 1929-3-31 5152 Contra Costa sand dike along river at Antioch; San Joaquin River Comment
  UC673338  Tropidocarpum gracile H. L. Mason 1929-3-31 5148 Contra Costa in pastures Briones Valley Comment
  UC672364  Turricula parryi Herbert L. Mason 1923-6-19 517 Ventura Horn Canyon Comment
  UC1093861  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
  UC635504  Umbellularia californica H. L. Mason Nov 26 1925-Nov 27 1925 2492 Sonoma Monte Rio, Russian River Russian River; Monte Rio, Russian River Comment
  UC1101461  Utricularia gibba Herbert L. Mason and Verne Grant 1941-9-27 13137 a Butte 3 mi. w. Biggs (Butte Sink); Butte Sink Comment
  UC1101462  Utricularia gibba Herbert L. Mason 1938-7-6 11854 Tuolumne w. Hetch Hetchy Dam (just s. of Miguel Meadows, Swamp Lake, Yosemite Nat'l Park); Yosemite Nat'l Park, Swamp Lake 1584 Comment
  UCD121676  Utricularia gibba Herbert L. Mason 1945-8-24 12670 Lake Boggs Lake. Comment
  JEPS9174  Utricularia intermedia H. L. Mason 1924-6-26 Plumas Blairsden Comment
  UC635680  Utricularia intermedia Herbert L. Mason 1924-6-26 1090 Plumas Graeagle near Blairsden; Graeagle Comment
  UC635676  Utricularia macrorhiza Herbert L. Mason 1929-9-9 5422 San Joaquin Holt, lower San Joaquin R. Comment
  YM-YOSE66550  Utricularia vulgaris Harry L. Mason 1938-7-10 11916 Tuolumne SWAMP LAKE RESEARCH RESERVE, SOUTH ISLAND OF LAKE Comment
  CAS-BOT-BC193383  Vaccinium ovatum H. L. Mason 1928-4-8 4289 a Sonoma Two miles north of Fort Ross. Comment
  UC571032  Vaccinium ovatum Herbert L. Mason 1927-9-25 4101 Santa Barbara Pine Ridge, slopes toward West Ranch Santa Cruz Island Comment
  UC571026  Vaccinium parvifolium H. L. Mason Jun 1930 5636 Mendocino Fort Bragg Comment
  UC571036  Vaccinium uliginosum subsp. occidentale Herbert L. Mason 1923-7-31 677 Tuolumne Lyell Fork of the Tuolumne River Yosemite National Park, Tuolumne River Comment
  UC962127  Vaccinium uliginosum subsp. occidentale H. L. Mason 1923-7-31 677 Tuolumne Dana Fork Sierra Nevada Mountains, Yosemite National Park Comment
  JEPS5119  Valerianella locusta H. L. Mason 1932-4-25 Amador Cosumnes River bridge (Amador Co. side), Ione to Latrobe Cosumnes River; Cosumnes River bridge Comment
  POM312343  Velezia rigida H. L. Mason 1948-5-31 13571 Stanislaus Stanislaus river, near Knight s Ferry. Comment
  UC912223  Venegasia carpesioides Herbert L. Mason 1923-6-15 420 Santa Barbara Gaviota Pass Comment
  UC672061  Veratrum fimbriatum Herbert L. Mason 1928-8-25 4929 Mendocino mesa 1 mi e mouth of Noyo River; Noyo Comment
  UC1177529  Veronica americana Herbert L. Mason, B. Fuller, H. Whisler 1958-7-13 26 Nevada 1 mi w of University of California Trout Laboratory (12 mi n of Truckee, Sage Hen Creek); Sierra Nevada, Sage Hen Creek 1981 Comment
  UC1191897  Veronica anagallis-aquatica Herbert L. Mason, S. Galen Smith 1948-8-9 8274 Santa Clara about 6 mi e of Gilroy (w base of Pacheco Pass); Pacheco Pass Comment
  UC964735  Veronica peregrina subsp. xalapensis H. L. Mason 1925-6-25 2113 Tuolumne Mather, Hog Ranch Hog Ranch; Mather, Hog Ranch Comment
  UC965650  Veronica peregrina subsp. xalapensis Herbert L. Mason 1952-7-19 14457 Sierra 1.5 mi e of Calpine (at junction of; with Sierraville-Beckwourth road); Sierra Nevada, Sierra Valley 1524 Comment
  UC672498  Veronica persica Herbert L. Mason 1930-6-1 5620 Mendocino Cloverdale to Fort Bragg via the Navarro River 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
  SEINET7370957  Vicia E. W. Mason 1976-3-13 s.n. Placer About 2 miles north of Auburn, North Fork American River 274 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
  RSA77752  Viola adunca H. L. Mason 1923-7-9 579 Tuolumne Mather. Comment
  UC581501  Viola adunca H. L. Mason 1923-7-28 655 Tuolumne White Wolf, Tioga Pass Road White Wolf 2438 Comment
  UC581487  Viola douglasii H. L. Mason 1926-4-30 3140 San Diego fields near Henshaw Dam Comment
  CAS-BOT-BC536569  Viola glabella Herbert L. Mason 1927-4-23 3672 San Mateo La Honda Comment
  JEPS19309  Viola hallii Herbert L. Mason 1947-5-17 14781 Trinity Summit of Scott Mountain grade Comment
  UC581509  Viola lobata subsp. lobata H. L. Mason 1925-7-30 2199 Tuolumne Smith Peak Trail ne of Mather; Smith Peak Trail Comment
  UC581497  Viola lobata subsp. lobata H. L. Mason 1926-5-29 3290 Placer burned area 2 mi w of Emmigrant Gap Comment
  RSA130981  Viola ocellata H. L. Mason 1917-3-8 66 San Mateo Kings Mtn. Comment
  UC581526  Viola ocellata H. L. Mason 1932-4-17 6949 Santa Clara road to Sweedal (headwaters of Uvas Creek); Uvas Creek Comment
  UC581538  Viola ocellata Herbert L. Mason 1927-4-23 3696 San Mateo Pescadero Creek near Bloomquists Mill; Pescadero Creek Comment
  UC581516  Viola pedunculata H. L. Mason 1926-3-1 1270 San Francisco Bernal Heights Comment
  UC581524  Viola pinetorum subsp. pinetorum H. L. Mason 1923-7-28 666 Mariposa Porcupine Flat, Tioga Pass Road Porcupine Flat Comment
  UC1076025  Viola purpurea subsp. integrifolia Herbert L. Mason 1947-5-17 14767 Trinity Scott Mountain Divide Comment
  UC581522  Viola purpurea subsp. quercetorum H. L. Mason 1928-5-6 4565 Alameda Cedar Mountain; Mount Hamilton Range, Cedar Mountain Comment
  UC581493  Viola sempervirens H. L. Mason 1927-4-23 3668 San Mateo La Honda Comment
  GH341837  Vulpia microstachys var. ciliata H. L. Mason 1932-5-4 7066 Unknown Laundry farm, Oakland hills Comment
  CAS-BOT-BC185821  Vulpia myuros subsp. megalura Herbert L. Mason; Malcom A. Nobs 1949-4-27 722 Solano Suisun State Game Refuge Comment
  CAS-BOT-BC185823  Vulpia myuros subsp. megalura Herbert L. Mason; Malcom A. Nobs 1949-4-27 722 Solano Suisun State Game Refuge 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
  UC1112276  Wolffia borealis H. L. Mason 1955-6-8 14629 Shasta w edge Fall River Mill (at the bridge) Comment
  CAS-BOT-BC534960  Wolffia borealis H. L. Mason 1955-6-8 14629 Shasta Bridge, W edge of Fall River Mill Comment
  UC1101235  Wolffiella lingulata Herbert L. Mason and S. Galen Smith 1948-7-28 8227 Merced 2 mi n Los Banos; San Joaquin Valley, Los Banos Wildlife Refuge Comment
  UC635135  Wolffiella lingulata H. L. Mason 1937-6-21 11548 San Joaquin 0.5 mi sw Holt, Roberts Island (Trappers Slough); Trappers Slough Comment
  UC936135  Wolffiella lingulata Herbert L. Mason 1945-10-10 San Joaquin Trappers Slough San Joaquin River, Roberts Island (Roberts Island, delta of the San Joaquin River) Comment
  CAS-BOT-BC535200  Wolffiella lingulata Herbert L. Mason 1937-6-21 11548 San Joaquin Trapper Slough, 1/2 mile southwest of Holt, Robert Island Comment
  UC912509  Wyethia angustifolia Herbert L. Mason 1934-4-28 8073 Sonoma head Dohrman's Creek; Jensen's Ranch Comment
  RSA130400  Wyethia helenioides H. L. Mason 1917-04 s.n. Santa Clara Foothills back of Santa Clara. Comment
  UC632873  Wyethia helenioides H. L. Mason 1936-4-10 11048 Calaveras road between Murphy's and Angel's Camp Comment
  UC912237  Xanthium spinosum Herbert L. Mason 1923-10-6 767 Napa in pasture bordering Suisun Marsh Comment
  UC566875  Yabea microcarpa H. L. Mason 1926-4-11 2848 Alameda Cedar Mountain Mount Hamilton Range (Rancho Repose) Comment
  UC1099976  Zannichellia palustris Herbert L. Mason 1948-6-29 13582 Merced 5 mi. n. Volta Comment
  UC1099979  Zannichellia palustris Herbert L. Mason and Verne Grant 1947-7-9 13401 Modoc several mi. s. Alturas (irrigation ditch by Jones' Lane off Hwy. 395) Comment
  UC1099991  Zannichellia palustris Herbert L. Mason 1929-8-24 5397 Mendocino Fort Bragg, Pudding Creek Slough Comment
  CAS-BOT-BC454210  Zannichellia palustris Herbert L. Mason; Verne Grant 1947-7-8 13281 Lake Bear Creek near junction of Williams highway and Upper Lake highway Comment
  UC1077115  Zigadenus fremontii Herbert L. Mason 1938-5-7 11772 Santa Barbara Burton Mesa Comment
  UC673505  Zigadenus fremontii H. L. Mason 1923-6-18 489 Ventura Topa Topa Mountain Comment
  UC673512  Zigadenus fremontii H. L. Mason 1927-3-11 3652 San Francisco Bernal Heights San Francisco Comment
  UC673516  Zigadenus venenosus var. venenosus H. L. Mason 1923-7-12 581 Tuolumne Mather Comment
  UC1099958  Zostera marina Herbert L. Mason Jun 1930 5671 Marin Dillon's Beach, washed up by surf Comment



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