Search Results — 2000 specimen records retrieved (1086 records with coordinates)
(That's the default maximum. Contact Jason Alexander for larger data requests.)

Results for search: Source=All; Collector=Peirson; Collector number=;   

Mapping Options:

BerkeleyMapper with county and bioregion layers
BerkeleyMapper without layers.
KML export
(Note: only records with coordinates are mappable)

Download Options:
Select all records · Select records with coordinates

Include annotations and voucher information

PLEASE NOTE: Due to changes in newer versions of Excel, directly copying text from the above selected results does not produce a usable table.
    Follow these steps:
      1. The contents of the selected results window must be copied into a text editor like TextEdit for Mac or WordPad for Windows
      2. The selected results must be saved as a new text document.
      3. This new text document can now be copied into Excel or imported as a tab delimited text file.

(For large data reqests, please contact Jason Alexander, jason_alexander@berkeley.edu.)

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

Click on column header to sort data (* sorts by family); click in leftmost checkbox to select record. CCH Help Page.
Turn on yellow flags to show possible range discrepancies. Read more ...
? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  JEPS36690  Lactuca saligna Frank W. Peirson 1925-11-2 6471 Alameda Berkeley Hills Comment
  RSA83339  Lepechinia calycina Mabel Peirson 1926-5-1 7069 Alameda Berkeley Hills. Comment
  POM87048  Agoseris hirsuta F. W. Peirson 1925-10-11 6464 Alameda Berkeley Hills Comment
  RSA0070586  Cirsium brevistylum F. W. Peirson 1923-7-4 3930 Alameda Strawberry Creek, Berkeley. Comment
  RSA65967  Eriogonum caninum F. W. Peirson 1925-9-20 6434 Alameda Near old home of Joaquin Miller, hills back of Oakland Comment
  RSA97366  Sanicula bipinnata F. W. Peirson, Mabel Peirson 1926-4-10 6633 Alameda West slope of El Cerrito Comment
  CAS-BOT-BC119059  Carex phaeocephala Frank Warrington Peirson 1935-7-30 11722 Alpine Woods Lake Region. 2804 Comment
  CAS-BOT-BC174085  Cerastium beeringianum Frank W. Peirson 1937-7-25 12120 Alpine Woods Lake Region. Near the Fourth of July Lake 2895 Comment
  CAS-BOT-BC268245  Eriogonum umbellatum var. nevadense Frank W. Peirson 1937-7-26 s.n. Alpine Woods Lake region, foot of Elephant Comment
  CAS-BOT-BC28174  Carex hoodii Frank W. Peirson 1935-7-24 11710 Alpine Lake Alpine. Comment
  JEPS27463  Sedum lanceolatum Frank W. Peirson 1937-7-23 12104 Alpine Plateau area sw Woods Lake (Woods Lake Region); , Plateau area sw of Woods Lake 2743 Comment
  JEPS38324  Hemizonella minima Frank W. Peirson 1935-7-24 11564 Alpine slope n lake; Lake Alpine Region 2255 Comment
  JEPS3855  Veronica cusickii Frank W. Peirson 1937-7-23 Alpine along western edge of Plateau sw of Woods Lake; Woods Lake Region 2804 Comment
  POM231943  Primula suffrutescens F. W. Peirson 1937-7-23 12109 Alpine Along western edge of plateau southwest of Woods Lake 2805 Comment
  RSA423133  Eriogonum incanum F. W. Peirson 1935-7-29 11626 Alpine Woods Lake Region. Along trail in open country southeastward from lake. 2744 Comment
  RSA66216  Arabis lyallii F. W. Peirson 1939-8-11 12825 Alpine Near Round Top Lake, Woods Lake Region 2896 Comment
  RSA83969  Saxifraga bryophora F. W. Peirson 1939-8-11 12815 Alpine Round Top Lake. Woods Lake Region. Sierra Nevada. 2896 Comment
  RSA87467  Lupinus meionanthus F. W. Peirson 1937-7-23 12101 Alpine Northwest of Woods Lake. Comment
  RSA88809  Carex davyi F. W. Peirson 1935-7-26 11714 Alpine South of Makelumne River, (Hermit Valley) 2439 Comment
  SEINET180126 Image available Bromus carinatus var. marginatus Frank W. Peirson 1935-7-28 11615 Alpine Red Lake 2408 Comment
  UC570530  Lewisia nevadensis Frank W. Peirson 1935-7-29 Alpine se along trail Wood Lake; Woods Lake region 2743 Comment
  UC570532  Cryptantha affinis Frank W. Peirson 1935-7-26 11596 Alpine n slope above Mokelumne River; Hemit Valley 2438 Comment
  UC570535  Trifolium cyathiferum Frank W. Peirson 1935-7-25 11577 Alpine Lake Alpine region 2438 Comment
  UC570544  Ligusticum grayi Frank W. Peirson 1935-7-29 Alpine along trail s. eastward from Woods Lake; Woods Lake Region 2743 Comment
  UC570568  Raillardella argentea Frank W. Peirson 1935-7-30 11632 Alpine plain nw from Roundtop; Woods Lake Region 2804 Comment
  UC570570  Ipomopsis congesta Frank W. Peirson 1935-7-27 11608 Alpine s Ebbets Pass (summit region) 2743 Comment
  UC570575  Luzula cascadensis Frank W. Peirson 1935-7-24 11558 Alpine Margins Lake Alpine 2225 Comment
  UC640229  Valeriana californica Frank W. Peirson 1939-8-10 12797 Alpine slopes above Winnemucca Lake; Woods Lake Region 2773 Comment
  UC640249  Tetradymia canescens Frank W. Peirson 1939-8-12 12835 Alpine near Frog Lake; Woods Lake Region 2712 Comment
  UCR51824  Silene douglasii var. monantha F. W. Peirson 1935-7-29 11627 Alpine Sierra Nevada Mtns., Woods Lake Region. Along trail SE from lake 2744 Comment
Read comments
Oct 10 2010
  CAS-BOT-BC118618  Carex raynoldsii Frank Warrington Peirson 1937-7-22 12202 Alpine Woods Lake 2560 Comment
  CAS-BOT-BC31567  Carex luzulifolia Frank W. Peirson 1937-7-25 13564 Alpine Trail to Winnemucca, Woods Lake. 2682 Comment
  RSA0021121  Ribes lasianthum F. W. Peirson 1935-7-25 11575 Alpine North of Lake Alpine, Sierra Nevada. 2439 Comment
  RSA0078551  Orobanche uniflora subsp. occidentalis F. W. Peirson 1935-7-26 11595 Alpine North slope above North Fork of Mokelumne River at Hermit Valley. 2377 Comment
  RSA100243  Valeriana capitata subsp. californica F. W. Peirson 1939-8-10 12797 Alpine Above Winnemucca Lake, Woods Lake Region, Sierra Nevada 2744 Comment
  RSA472706  Polygonum sawatchense F. W. Peirson 1935-7-30 11634 Alpine Woods Lake Region. High open plain NW from Roundtop 2805 Comment
  RSA65054  Silene invisa F. W. Peirson 1939-8-14 13001 Alpine East Fork of Woods Creek, Woods Lake region. 2622 Comment
  RSA66761  Arabis divaricarpa F. W. Peirson 1937-7-23 12110 Alpine Along western edge of plateau southwest of Woods Lake 2805 Comment
  RSA69388  Thalictrum fendleri F. W. Peirson 1939-8-13 12859 Alpine Along the south shore of Woods Lake. 2561 Comment
  RSA71910  Navarretia capillaris F. W. Peirson 1939-8-14 12863 Alpine Woods Lake region, Sierra Nevada 2622 Comment
  RSA72665  Balsamorhiza sagittata F. W. Peirson 1935-7-25 11586 Alpine About 2 miles north of lake; Lake Alpine Region 2530 Comment
  RSA73737  Navarretia breweri F. W. Peirson 1937-7-23 12111 Alpine Southwest of Woods Lake. 2744 Comment
  RSA77588  Mertensia ciliata var. stomatechoides F. W. Peirson 1937-7-23 12099 Alpine Along the western edge of the Plateau, Woods Lake Region. 2805 Comment
  RSA77827  Hackelia nervosa F. W. Peirson 1935-7-28 11618 Alpine At lower end of Red Lake. 2409 Comment
  RSA78482  Carex heteroneura F. W. Peirson 1937-7-24 13576 Alpine Woods Lake. 2744 Comment
  RSA78515  Carex luzulifolia F. W. Peirson 1937-7-24 13565 Alpine Shores of Winnemucca Lake, Woods Lake Region 2744 Comment
  RSA79585  Plagiobothrys scouleri var. hispidulus F. W. Peirson 1939-8-12 12834 Alpine Meadow south of Carson Pass, Sierra Nevada, California Woods Lake region 2622 Comment
  RSA80035  Veronica serpyllifolia var. humifusa F. W. Peirson 1939-8-10 12814 Alpine Woods Lake Region. 2546 Comment
  RSA83394  Monardella odoratissima subsp. pallida F. W. Peirson 1939-8-9 12791 Alpine Woods Lake Region, Sierra Nevada 2546 Comment
  RSA88795  Carex whitneyi F. W. Peirson 1935-7-26 11715 Alpine Banks of Mokelumne River, Hermit Valley. 2287 Comment
  RSA90770  Astragalus whitneyi F. W. Peirson s.n. Alpine Frog Lake, Woods Lake Region. 2713 Comment
  RSA90773  Astragalus whitneyi F. W. Peirson 1935-7-27 11603 Alpine Region south of Ebbets Pass. 2805 Comment
  RSA90982  Erigeron breweri F. W. Peirson 1939-8-10 12803 Alpine North shore of Winnemucca Lake, Woods Lake Region, Sierra Nevada 2744 Comment
  RSA91012  Erigeron barbellulatus F. W. Peirson 1935-7-25 11587 Alpine Open summit of ridge ca. 2 miles N of Lake Alpine 2561 Comment
  RSA91053  Carex multicostata F. W. Peirson 1937-7-26 12206 Alpine East of Winnemucca Lake, Woods Lake Region, Sierra Nevada. 2835 Comment
  RSA91184  Lupinus arbustus subsp. silvicola F. W. Peirson 1935-7-25 11579 Alpine Lake Alpine Region. 2439 Comment
  RSA92331  Poa nervosa F. W. Peirson 1935-7-27 11606 Alpine Summit region S of Ebbet's Pass. Sierra Nevada. 2805 Comment
  RSA93050  Erigeron peregrinus subsp. callianthemus F. W. Peirson 1939-8-11 12823 Alpine High meadow north of Round Top, Woods Lake Region 2957 Comment
  RSA95149  Crepis modocensis subsp. subacaulis F. W. Peirson 1937-7-25 12119 Alpine Short distance east of Fourth of July Lake, Woods Lake Region, Sierra Nevada 2896 Comment
  RSA97390  Osmorhiza occidentalis F. W. Peirson 1937-7-26 s.n. Alpine East Fork of Woods Creek, Sierra Nevada Comment
  SEINET8755232 Image available Carex whitneyi F. W. Peirson 1935-7-26 11715 Alpine Hermit Valley, Alpine Co., 7500 ft. Comment
  RSA79777  Penstemon rydbergii var. oreocharis F. W. Peirson 1926-6-21 6772 Butte Butte Meadow, Humboldt Road. Comment
  CAS-BOT-BC154039  Diplacus torreyi F. W. Peirson 1926-6-21 6778 Butte High ridge east of Butte Meadow, Humboldt Road Comment
  RSA65745  Mollugo verticillata F. W. Peirson 1926-6-20 6762 Butte Banks of Sacramento River, 5 miles west of Chico. Comment
  RSA69294  Camassia leichtlinii subsp. suksdorfii Frank W. Peirson 1926-6-21 6768 Butte Butte Meadow, Humboldt Road. Comment
  RSA69605  Sagittaria latifolia F. W. Peirson 1926-6-20 6759 Butte Banks of Sacramento River, 5 miles west of Chico. Comment
  RSA70165  Brodiaea purdyi F. W. Peirson 1926-6-21 6767 Butte Butte Meadow, Humboldt Road. Comment
  RSA92160  Scirpus diffusus F. W. Peirson 1926-6-21 6769 Butte Butte Meadow, Humboldt Road. Comment
  RSA95063  Hemizonia fitchii F. W. Peirson 1923-7-21 3901 Butte North of Chico. Comment
  RSA80469  Mimulus nanus var. mephiticus F. W. Peirson 1935-7-23 11556 Calaveras Big Meadow, North Fork of Stanislaus River region. 1982 Comment
  RSA86768  Deschampsia elongata F. W. Peirson 1935-7-23 11554 Calaveras Big Meadow, North Fork of Stanislaus River 1982 Comment
  SEINET180130 Image available Poa bolanderi Frank W. Peirson 1935-7-23 11555 Calaveras North Fork of Stanislaus River Region; Big Meadow. 1981 Comment
  UC570541  Sidalcea glaucescens Frank W. Peirson 1935-7-23 Calaveras Big Meadow , Big Meadow (N Fork Stanislaus River Region) 1981 Comment
  RSA79583  Plagiobothrys scouleri var. hispidulus F. W. Peirson 1935-7-23 11546 Calaveras Big Meadow, N. Fork of Stanislaus River, Sierra Nevada 1982 Comment
  RSA85542  Cheilanthes gracillima F. W. Peirson 1935-7-23 11540 Calaveras Big Meadow, North Fork of Stanislaus River 1982 Comment
  RSA91256  Lupinus breweri var. breweri F. W. Peirson 1935-7-23 11549 Calaveras Big Meadow, North Fork of Stanislaus River. 1982 Comment
  RSA91848  Danthonia californica var. americana F. W. Peirson 1935-7-23 11553 Calaveras Big Meadow, North Fork of Stanislaus River 1982 Comment
  RSA74783  Phacelia distans F. W. Peirson 1923-7-1 5302 Contra Costa Near summit of Mt. Diablo. Comment
  CAS-BOT-BC202822  Paxistima myrsinites Frank W. Peirson 1923-7-13 3763 Del Norte Road from Crescent City to Grants Pass, about 1 mile south of the Oregon Line Comment
  CAS-BOT-BC318142  Packera bolanderi var. bolanderi Frank Warrington Peirson 1923-7-12 3924 Del Norte 10 miles northeast of Crescent City Comment
  RSA68717  Lilium bolanderi Frank W. Peirson 1923-7-13 3689 Del Norte 10 miles north of Gasquet Comment
  UC589681  Lomatium howellii Frank W. Peirson 1923-7-13 3948 Del Norte 4 mi. n.e. Gasquet Comment
  CAS-BOT-BC318597  Monardella purpurea Frank W. Peirson 1923-7-13 3835 Del Norte 4 miles NE of Gasquet on the Grantqq Pass Road.. Comment
  CAS-BOT-BC416400  Linnaea borealis subsp. longiflora F. W. Peirson 1923-7-13 3865 Del Norte Road from Crescent City to Grants Pass, about 2 miles S of the Oregon line Comment
  RSA70069  Platanthera sparsiflora Frank W. Peirson 1923-7-13 33699 Del Norte 7 miles north of Gasquet. Comment
  RSA72660  Balsamorhiza hookeri F. W. Peirson 1925-7-1 6188 Del Norte El dorado County. open woods, state line, Lake Tahoe 1951 Comment
  RSA85042  Polystichum munitum F. W. Peirson 1923-7-12 3633 Del Norte ? miles northeast of Crescent City. Comment
  RSA85531  Vancouveria hexandra F. W. Peirson 1923-7-12 3728 Del Norte 6 miles northeast of Crescent City. Comment
  CAS-BOT-BC173323  Ribes lasianthum Frank W. Peirson 1925-7-3 6228 El Dorado Glen Alpine Creek 2438 Comment
  JEPS36707  Stephanomeria lactucina Frank W. Peirson 1931-8-10 9550 El Dorado along boulevard on w shore Lake Tahoe 1920 Comment
  JEPS53871  Rorippa subumbellata Frank W. Peirson 1925-7-1 6187 El Dorado State Line Lake Tahoe, State Line Comment
  PASA520  Calochortus nudus Frank W. Peirson 1925-7-3 El Dorado Glen Alpine Creek Basin Comment
  POM175495  Symphoricarpos acutus F. W. Peirson 1925-7-6 6288 El Dorado Trail from Fallen Leaf Lake to Angora Lookout, region of Lake Tahoe, Sierra Nevada. 2287 Comment
  RSA74809  Nama lobbii F. W. Peirson 1931-8-10 9548 El Dorado Along boulevard on west shore of Lake Tahoe. 1921 Comment
  SD87815  Ivesia gordonii Frank W. Peirson 1925-7-3 6231 El Dorado Glen Alpine Creek Basin, 2286 Comment
  CAS-BOT-BC113172  Eleocharis palustris Frank Warrington Peirson 1925-7-2 6206 El Dorado Wet field, south side of Lake Tahoe, Sierra Nevada. 1905 Comment
  CAS-BOT-BC420140  Polygonum ramosissimum subsp. prolificum F. W. Peirson 1925-6-2 6204 El Dorado South side of Lake Tahoe Comment
  CAS-BOT-BC435451  Lithophragma glabrum F. W. Peirson 1925-7-5 6271 El Dorado Ridge on middle trail to Mt. Tallac, Sierra Nevada 2590 Comment
  PASA613  Scirpus congdonii Frank W. Peirson 1931-8-6 El Dorado Glen Alpine Creek Basin, marsh near trail to Lake of the Woods 2042 Comment
  POM84481  Aconitum columbianum var. columbianum F. W. Peirson 1931-8-7 9521 El Dorado Glen Alpine Creek Basin. 2226 Comment
  POM87061  Arnica nevadensis F. W. Peirson 1925-7-2 6223 El Dorado Glen Alpine Road, Fallen Leaf Lake 2012 Comment
  RSA0019669  Ribes velutinum F. W. Peirson 1925-7-3 6228 El Dorado Glen Alpine Creek Basin. Sierra Nevada. 2439 Comment
  RSA0024723  Ribes roezlii F. W. Peirson 1925-7-3 6230 El Dorado Glen Alpine Creek Basin, Sierra Nevada. 2287 Comment
  RSA65863  Polygonum douglasii F. W. Peirson 1925-7-2 6205 El Dorado El Dorado County; wet field, S side of Lake Tahhoe, Sierra Nevada. 1921 Comment
  RSA66327  Polygonum phytolaccifolium F. W. Peirson 1925-7-2 6221 El Dorado Glen Alpine road, 1/2 mile above Fallen Leaf, Sierra Nevada Comment
  RSA69406  Delphinium nuttallianum F. W. Peirson 1925-7-4 6258 El Dorado Road on E side of Fallen Leaf Lake. 1951 Comment
  RSA70057  Juncus bufonius var. occidentalis F. W. Peirson 1925-7-2 6207 El Dorado South side of Lake Tahoe. 1905 Comment
  RSA70151  Triteleia hyacinthina F. W. Peirson 1925-7-1 6200 El Dorado State Line, Lake Tahoe. 1921 Comment
  RSA70251  Allium obtusum var. obtusum F. W. Peirson 1925-7-7 6316 El Dorado Echo Lakes Divide. 2591 Comment
  RSA70296  Juncus orthophyllus F. W. Peirson 1931-8-8 9538 El Dorado Marsh near trail to Lake of the Woods; Glen Alpine Creek Basin. 2043 Comment
  RSA80052  Veronica serpyllifolia var. humifusa F. W. Peirson 1925-7-2 6203 El Dorado South end of Lake Tahoe. 1921 Comment
  RSA84376  Lithophragma glabrum F. W. Peirson 1925-7-5 6271 El Dorado Just below summit of ridge of middle trail to Mt. Tallac. Sierra Nevada. 2591 Comment
  RSA85309  Paeonia brownii F. W. Peirson 1925-7-1 6169 El Dorado State Line, Lake Tahoe 1905 Comment
  RSA85540  Cheilanthes gracillima F. W. Peirson 1931-8-7 9524 El Dorado Near Grass Lake, Glen Alpine Creek Basin. 2226 Comment
  RSA85916  Polygonum aviculare F. W. Peirson 1925-7-2 6204 El Dorado South side of Lake Tahoe. 1905 Comment
  RSA90618  Stenotus acaulis F. W. Peirson 1925-7-5 6273 El Dorado Plateau on summit of ride [ridge?] of Mt Tallac. 2591 Comment
  RSA91493  Scirpus congdonii F. W. Peirson 1931-8-8 9539 El Dorado Sierra Nevada: near trail to Lake of [the] Woods, Glen Alpine Creek Basin 2043 Comment
  RSA91957  Glyceria striata F. W. Peirson 1931-8-7 9533 El Dorado Trail to Grass Lake above Glen Alpine. 2134 Comment
  RSA92325  Poa secunda F. W. Peirson 1924-7-3 6255 El Dorado Glen Alpine Creek Basin 2378 Comment
  RSA92691  Eriophyllum lanatum var. integrifolium F. W. Peirson 1925-7-8 6495 El Dorado South Fork of American River 1829 Comment
  RSA94868  Arnica nevadensis F. W. Peirson 1925-7-2 6223 El Dorado Glen Alpine Road, 0.5 mile above Fallen Leaf Lake 2012 Comment
  RSA94870  Arnica nevadensis F. W. Peirson 1925-7-5 6276 El Dorado Near summit of Mt. Tallac, Sierra Nevada Comment
  RSA95018  Malacothrix floccifera F. W. Peirson 1925-7-8 6323 El Dorado Road down American River, Sierra Nevada. Comment
  RSA95229  Stephanomeria lactucina F. W. Peirson 1931-8-10 9550 El Dorado Along boulevard on west shore of Lake Tahoe. 1921 Comment
  SEINET7564646 Image available Carex lenticularis var. lipocarpa F. W. Peirson 1935-7-31 11725 El Dorado Lake Tahoe, at Emerald Bay. 1905 Comment
  CAS-BOT-BC177570  Astragalus bolanderi Frank W. Peirson 1939-8-18 12869 Fresno Huntington Lake 2133 Comment
  CAS-BOT-BC294571  Erigeron breweri var. breweri Frank W. Peirson 1921-8-9 2521 Fresno Aspen Meadow, South Fork San Joaquin River 2514 Comment
  JEPS66604  Gaultheria humifusa F. W. Peirson 1921-8-13 2530 Fresno Grouse Meadows, Le Carte Canyon Le Carte Canyon; Sierra Nevada, Grouse Meadows, Le Carte Canyon Comment
  PASA2793  Erigeron compositus var. discoideus F. W. Peirson 1921-8-12 Fresno Muir Pass 3657 Comment
  RSA66075  Barbarea orthoceras F. W. Peirson 1919-8-24 1917 Fresno Rae Lake, Sierra Nevada. 3232 Comment
Read comments
Dec 23 2018
  RSA68684  Zigadenus venenosus var. venenosus Frank W. Peirson 1921-8-13 2821 Fresno Grouse Meadows, Middle Fork of Kings River, Sierra Nevada. 2515 Comment
  RSA68737  Fritillaria atropurpurea Frank W. Peirson 1911-1 1674 Fresno Rae Lake and other high Sierra Nevada points Comment
  RSA69654  Spiranthes romanzoffiana Frank W. Peirson 1919-8-24 1700 Fresno Rae Lake, Sierra Nevada. 3232 Comment
Read comments
Dec 23 2018
  RSA70566  Vaccinium uliginosum subsp. occidentale F. W. Peirson 1917-08 837 Fresno Grouse Meadows, Sierra Nevada. 2515 Comment
  RSA84316  Isoetes bolanderi F. W. Peirson 1921-8-15 2544 Fresno Cartridge Creek, Sierra Nevada 3201 Comment
  RSA84492  Actaea rubra subsp. arguta F. W. Peirson 1921-8-14 2815 Fresno Le Conte Canyon, Middle Fork of Kings River 2439 Comment
  RSA85543  Cheilanthes gracillima F. W. Peirson 1913-8-15 2332 Fresno Simpson Meadow, Sierra Nevada Comment
  RSA86181  Aspidotis densa F. W. Peirson 1939-8-20 12870 Fresno Abundant along west trail about Florence Lake 2226 Comment
  UC1026421  Carex athrostachya F. W. Peirson 1939-8-18 13602 Fresno Huntington Lake Comment
  UC1026432  Carex pellita F. W. Peirson 1939-8-22 13594 Fresno Jackass Meadow Florence Lake 2179 Comment
  PASA1897  Epilobium latifolium Frank W. Peirson 1921-8-9 Fresno Aspen Meadow, South Fork San Joaquin Riv. 2514 Comment
  POM87050  Grindelia camporum F. W. Peirson 1925-10-22 6467 Fresno San Joaquin River at Valley Boulevard. Comment
  POM9848  Rorippa curvisiliqua F. W. Peirson 1919-8-2 1905 Fresno Paradise Valley. Sierra Nevada. [county not specified] 2027 Comment
Read comments
Dec 19 2015
  RSA0020498  Draba lemmonii F. W. Peirson 1921-8-11 2624 Fresno Evolution Lake region, Sierra Nevada. 3506 Comment
  RSA0074823  Sedum obtusatum F. W. Peirson 1917-8-2 1927 Fresno Grouse Meadows, Sierra Nevada, Kings Canyon National Park. 2515 Comment
  RSA0081567  Pyrola minor F. W. Peirson 1919-8-4 825 Fresno Vidette Meadow, Bubbs Creek. 2896 Comment
  RSA0129527  Arabis lemmonii F. W. Peirson 1921-8-16 2623 Fresno South Fork of Kings River, Sierra Nevada. 2896 Comment
  RSA61495  Trifolium agrarium F. W. Peirson 1939-8-18 12868 Fresno Near upper end of Huntington Lake. Comment
  RSA65878  Polygonum minimum F. W. Peirson 1921-8-17 1798 a Fresno S Fork of Kings River, Sierra Nevada. 3125 Comment
  RSA72087  Microsteris gracilis subsp. gracilis F. W. Peirson 1925-3-23 5644 Fresno Road between Coalinga and Parkfield, Inner South Coast Ranges 915 Comment
  RSA72179  Epilobium hornemannii subsp. hornemannii F. W. Peirson 1919-8-18 761 Fresno Summit Meadow. Kings River Region. Sierra Nevada. 2439 Comment
  RSA82245  Castilleja miniata F. W. Peirson 1919-8-22 1151 Fresno Woods Creek, Sierra Nevada. 2530 Comment
  RSA84398  Mitella breweri F. W. Peirson 1921-8-9 2625 Fresno Aspen Meadow. S Fork of the San Joaquin River. Sierra Nevada. 2515 Comment
  RSA84864  Ranunculus eschscholtzii F. W. Peirson 1921-8-11 2531 Fresno Evolution Creek Region, slopes of Mt. Dawin, Sierra Nevada. 3430 Comment
  RSA85022  Woodsia scopulina F. W. Peirson 1921-8-15 2837 Fresno Taboose Pass, Sierra Nevada 3201 Comment
  RSA90662  Chrysothamnus nauseosus subsp. albicaulis F. W. Peirson 1919-8-18 1248 Fresno Lookout Peak at Summit Meadow, Sierra Nevada 2607 Comment
  RSA90929  Trifolium monanthum F. W. Peirson 1919-8-22 557 Fresno Woods Creek, Sierra Nevada 2530 Comment
  RSA90983  Erigeron elmeri F. W. Peirson 1917-8-12 1287 Fresno Grouse Meadows, Middle Fork Kings River, Sierra Nevada 2515 Comment
  RSA93048  Erigeron peregrinus subsp. callianthemus F. W. Peirson 1911-7-29 s.n. Fresno Trail from Hume to Summit Meadow, Sierra Nevada. Comment
  RSA93316  Aster breweri F. W. Peirson 1921-8-10 2750 Fresno Evolution Creek, Sierra Nevada 2957 Comment
  RSA93336  Kelloggia galioides F. W. Peirson 1919-8-18 1190 Fresno Near Summit Meadow. Sierra Nevada. 2439 Comment
  RSA94521  Raillardella argentea F. W. Peirson 1913-1 1414 Fresno South Fork of Kings River, Sierra Nevada. Comment
  RSA94528  Raillardella argentea F. W. Peirson 1917-8-14 1415 Fresno Dusey Creek, Sierra Nevada. Comment
  RSA94750  Senecio pauciflorus F. W. Peirson 1921-8-11 2631 Fresno Evolution Lake, Sierra Nevada. 3354 Comment
  RSA94753  Senecio fremontii F. W. Peirson 1921-8-11 2562 Fresno Southwest slope of Mt. Darwin, Evolution Lake region, Sierra Nevada. 3537 Comment
  PASA46  Galium bolanderi Frank W. Peirson 1932-7-7 Humboldt Willow Creek Comment
  RSA33737  Aster chilensis F. W. Peirson 1923-7-11 3882 Humboldt 7 miles north of Arcata. Comment
  RSA70263  Juncus phaeocephalus var. phaeocephalus F. W. Peirson 1923-7-11 3669 Humboldt 7 miles N of Arcata, Humboldt County Comment
  RSA77350  Ceanothus thyrsiflorus F. W. Peirson 1941-7-28 13106 Humboldt at the Hwy Observation point about 1 mile S of Orick Comment
  RSA77779  Viola adunca F. W. Peirson 1926-7-12 7028 Humboldt West slope of Coast Range back of Orick. Comment
  RSA84982  Potamogeton natans F. W. Peirson 1923-7-11 3640 Humboldt 20 miles north of Eureka. Comment
  RSA86980  Alnus rubra F. W. Peirson 1926-7-13 7045 Humboldt South of Orick. Comment
  POM98598  Malacothrix floccifera F. W. Peirson 1926-7-14 s.n. Humboldt Sandy shores of Eel River about 5 miles south of Scotia Comment
  RSA0116954  Camassia leichtlinii subsp. suksdorfii Frank W. Peirson 1923-7-11 3681 Humboldt 7 miles north of Arcata. Comment
  RSA77516  Myriophyllum sibiricum F. W. Peirson 1923-7-11 3786 Humboldt 20 miles north of Eureka. Comment
  RSA79453  Scrophularia californica F. W. Peirson 1926-7-13 7053 Humboldt Vicinity of Blue Lake, Mad River. Comment
  RSA90281  Lathyrus littoralis F. W. Peirson 1923-7-11 3623 Humboldt 18 miles north of Eureka. Comment
  RSA91239  Vicia hirsuta F. W. Peirson 1923-7-11 3630 Humboldt Flats north of Eureka Comment
  RSA91480  Schoenoplectus maritimus F. W. Peirson 1923-7-11 3660 Humboldt Flats north of Eureka. Comment
  RSA91561  Trifolium bifidum var. decipiens F. W. Peirson 1926-7-12 7031 Humboldt Redwood Creek, Orick. Comment
  RSA91660  Carex obnupta F. W. Peirson 1941-7-28 13108 Humboldt Road to Patrick Point. Comment
  RSA91828  Calamagrostis bolanderi F. W. Peirson 1941-7-28 13115 Humboldt at Patrick's Point State Park Comment
  RSA92453  Dichanthelium acuminatum var. fasciculatum F. W. Peirson 1923-7-9 3650 Humboldt along Eel River, Humboldt State Park Comment
  RSA95266  Sidalcea oregana subsp. spicata F. W. Peirson 1923-7-11 3778 Humboldt Along road 7 miles north of Arcata. Comment
  UC1026440  Carex obnupta Frank W. Peirson 1941-7-28 13108 Humboldt Patrick Pt. State Park Comment
  CAS-BOT-BC419589  Eschscholzia parishii Frank W. Peirson 1941-4-8 s.n. Imperial Painted Gorge. The road to gorge turns north from boulevard a few miles east of Mountain Springs Grade Comment
  POM128745  Ephedra trifurca F. W. Peirson 1927-4-15 7193 Imperial Sand dunes west of Yuma. Comment
  POM128748  Machaeranthera asteroides F. W. Peirson 1927-4-15 7206 Imperial Low land along Colorado River, near Ft. Yuma. Comment
  RSA428267  Phacelia minutiflora F. W. Peirson 1935-4-16 11465 Imperial 4-S Pass, eastern Imperial County. Comment
  RSA64622  Eriogonum thomasii F. W. Peirson, W. L. Jepson 1928-4-22 7881 Imperial Foot of rocky walls of the Narrows, San Felipe Creek. Comment
Read comments
Aug 22 2014
  RSA65742  Sesuvium verrucosum F. W. Peirson 1927-4-15 7204 Imperial Low land along Colorado River, near Ft. Yuma. Comment
  RSA65743  Sesuvium verrucosum F. W. Peirson 1918-04 1856 Imperial Salton Sea. Comment
Read comments
Nov 18 2014
  RSA69555  Mentzelia hirsutissima var. stenophylla F. W. Peirson 1927-4-16 7209 Imperial Foot of Mountain Springs Grade, Western Imperial County Comment
  RSA69990  Allionia incarnata F. W. Peirson 1932-3-22 9808 Imperial Desert Mts N of Midway Well 610 Comment
  RSA70389  Euphorbia polycarpa var. hirtella F. W. Peirson 1922-4-12 4258 Imperial 28 miles south of Coachella. Comment
  RSA70497  Erodium texanum F. W. Peirson 1922-4-12 2886 Imperial 28 miles southeast of Coachella. Comment
  RSA72239  Camissonia claviformis subsp. yumae F. W. Peirson 1932-3-21 9768 Imperial 6 miles east of Holtville. 0 Comment
  RSA75130  Nemacladus glanduliferus var. orientalis F. W. Peirson 1932-3-22 9798 Imperial Midway Well. 152 Comment
  RSA75148  Nemacladus glanduliferus F. W. Peirson 1927-4-16 7219 Imperial Foot of Mountain Springs Grade, Western Imperial County Comment
  RSA75402  Camissonia boothii subsp. condensata F. W. Peirson 1927-4-14 7183 Imperial Along canyon banks near east end of Santa Rosa Mountains, 8 miles from boulevard to Imperial Valley. 305 Comment
  RSA75420  Oenothera deltoides subsp. deltoides F. W. Peirson 1922-4-12 2905 Imperial 45 miles southeast of Coachella Comment
  RSA75685  Camissonia refracta F. W. Peirson 1932-3-22 9807 Imperial Midway Well. 152 Comment
  RSA76970  Condalia globosa var. pubescens F. W. Peirson 1932-3-21 9794 Imperial 24 miles north of Ogibly 183 Comment
  RSA77425  Petalonyx linearis F. W. Peirson 1935-4-16 11460 Imperial North of bridge of canal at Laguna Dam [AZ], north of Yuma. Comment
Read comments
Feb 25 2008
  RSA79885  Datura discolor F. W. Peirson 1922-4-13 2897 Imperial Foot of Mountain Springs Grade, w. Imperial County. Comment
  SBBG29147  Polygonum argyrocoleon F. W. Peirson, W. L. Jepson 1927-4-13 7179 Imperial Imperial Valley Blvd, opposite ca. central part of Salton Sea Comment
  SD87868  Porophyllum gracile F. W. Peirson 1922-4-13 2882 Imperial Foot of Mountain Springs Grade Comment
  UC501441  Gilia stellata Frank W. Peirson 1932-3-22 9803 Imperial Midway Well Midway Well (eastern Imperial County) 152 Comment
  UC501509  Ephedra trifurca Frank W. Peirson 1932-3-21 9774 Imperial se Imperial County The Sand Hills Comment
  UC909108  Loeseliastrum schottii Frank W. Peirson 1927-4-16 7218 Imperial foot of Mountain Springs Grade (along n. bank of stream) Comment
  UCR129684  Camissonia chamaenerioides F. W. Peirson 1922-4-13 2898 Imperial Peninsular Range/Western Colorado Desert, Mountain Springs Grade 457 Comment
  UCR142998  Ephedra trifurca F. W. Peirson 1922-4-12 2866 Imperial Sonoran/ Southern Colorado Desert, along Imperial Valley Boulevard near south end of Salton Sea -61 Comment
  RSA0020069  Lycium brevipes var. hassei F. W. Peirson 1927-4-14 7190 Imperial Canyon near east end of Santa Rosa Mtns., 7.5 mi. from Imperial Valley Blvd. Comment
  RSA0121532  Apiastrum angustifolium F. W. Peirson 1927-4-16 7210 Imperial Foot of Mountain Springs Grade (road, San Diego to El Centro). Comment
  RSA90744  Astragalus magdalenae var. peirsonii F. W. Peirson 1927-4-15 7194 Imperial Lower part of dunes west of Yuma. Comment
  RSA91980  Pleuraphis rigida F. W. Peirson 1932-3-21 9775 Imperial Sand Hills near their east edge, west of Yuma 61 Comment
  RSA92218  Pectis papposa F. W. Peirson 1938-11-12 92218 Imperial Along boilevard to Imperial Valley directly opposite the road to Mecca. 0 Comment
Read comments
Feb 20 2013
  RSA93864  Encelia frutescens F. W. Peirson 1922-4-12 2875 Imperial 2 miles E of Coyote Well, on El Centro to San Diego road. Comment
  RSA94832  Trixis californica F. W. Peirson 1927-4-16 7212 Imperial Foot of Mountain Springs Grade, Western Imperial County Comment
  CAS-BOT-BC111189  Trichophorum clementis Frank Warrington Peirson 1934-7-27 11300 Inyo Geart Lake Meadow, Rock Creek Lake Basin 3215 Comment
  CAS-BOT-BC117784  Carex specifica Frank Warrington Peirson 1933-8-13 10849 Inyo Rock Creek Lake Basin, meadow at Heart Lake. 3200 Comment
  CAS-BOT-BC118691  Carex proposita Frank Warrington Peirson 1934-7-22 11399 Inyo Rock Creek Lake Basin. Shore of the Upper Glacial Lake. 3383 Comment
  CAS-BOT-BC118818  Carex preslii Frank Warrington Peirson 1940-8-17 13022 Inyo Heart Lake Meadow, Rock Creek Lake Basin. 3230 Comment
  CAS-BOT-BC128152  Salix lasiandra var. lasiandra F. W. Peirson 1936-4-7 13527 Inyo Darwin Falls Comment
  CAS-BOT-BC138538  Agrostis variabilis Frank W. Peirson 1934-7-23 12616 Inyo Rock Creek Lake Basin. Above the east chain Lakes. 3261 Comment
  CAS-BOT-BC158629  Purshia tridentata var. glandulosa Frank W. Peirson 1931-7-28 9469 Inyo Below Heart Lake, Rock Creek Lake Basin 3200 Comment
  CAS-BOT-BC218398  Comastoma tenellum Frank W. Peirson 1933-8-22 s.n. Inyo Heart Lake Meadow, Rock Creek Lake Basin 3200 Comment
  CAS-BOT-BC236007  Poa secunda subsp. secunda Frank W. Peirson 1940-8-19 12934 Inyo Rock Creek Lake Basin, in the defile across the Transverse Ridge 3261 Comment
  CAS-BOT-BC256839  Eriogonum incanum Frank W. Peirson 1940-8-16 12988 Inyo Rock Creek Lake Basin 3291 Comment
  CAS-BOT-BC258636  Eriogonum ovalifolium var. nivale Frank W. Peirson 1939-8-3 s.n. Inyo Rock Creek Lake Basin 3246 Comment
  CAS-BOT-BC267099  Triglochin palustris Frank W. Peirson 1940-8-4 12180 Inyo Rock Creek Lake Basin, on E side of canyon 3261 Comment
  CAS-BOT-BC28139  Carex hoodii Frank W. Peirson 1934-7-24 11306 Inyo Rock Creek Lake Basin. Steep mountain slope west of Heart Lake. 3352 Comment
  CAS-BOT-BC300110  Erigeron pumilus var. intermedius F. W. Peirson 1921-8-18 2760 Inyo Taboose Pass 3200 Comment
  CAS-BOT-BC30761  Amphipappus fremontii Frank W. Peirson 1932-5-6 9898 Inyo 8 miles east of Darwin 1219 Comment
  CAS-BOT-BC339951  Sphaeromeria cana Frank W. Peirson 1921-8-18 2772 Inyo Taboose Pass 3352 Comment
  CAS-BOT-BC34114  Carex breweri Frank W. Peirson 1934-7-22 s.n. Inyo Rock Creek Lake Basin. 3383 Comment
  CAS-BOT-BC349766  Monoptilon bellioides F. W. Peirson 1928-4-2 7780 Inyo About 1 mile east of Bradbury Well, Death Valley region Comment
  CAS-BOT-BC41864  Draba breweri Frank W. Peirson 1929-7-22 8532 Inyo Bishop Creek Region. Trail southward from Long Lake. 3413 Comment
  CAS-BOT-BC58280  Antennaria media F. W. Peirson 1931-7-26 9504 Inyo Valley south of Long Lake, Rock Creek Lake Basin 3261 Comment
  CAS-BOT-BC82148  Arnica chamissonis Frank W. Peirson 1921-8-5 2571 Inyo Big Pine Creek, Sierra Nevada 2743 Comment
  CAS-BOT-BC8260  Lupinus pratensis var. eriostachyus Frank Warrington Peirson 1921-8-5 530 Inyo Big Pine Creek 2743 Comment
  JEPS17175  Senecio flaccidus var. monoensis Frank W. Peirson 1936-4-6 11809 Inyo Titus Canyon 1066 Comment
  JEPS2566 Image available Epilobium angustifolium Frank W. Peirson 1921-8-18 2538 Inyo Taboose Pass; ; Taboose Pass, Inyo Co. 3200 Comment
  JEPS27456  Luzula subcongesta Frank W. Peirson 1937-8-5 12198 Inyo on shore Ruby Lake; Rock Creek Lake Basin, shore Ruby Lake 3398 Comment
  JEPS40753  Symphyotrichum spathulatum Frank W. Peirson 1931-7-20 9500 Inyo Rock Creek Lake Basin. 3398 Comment
  JEPS49135  Ephedra funerea Frank W. Peirson 1928-4-2 7790 Inyo near Bradbury Well; Death Valley Region Comment
  JEPS53586  Halimolobos jaegeri Frank W. Peirson 1927-7-24 7539 Inyo e slope Westgard Pass; e slope Westgard Pass Comment
  JEPS54868  Caesalpinia virgata Frank W. Peirson 1917-1 2 Inyo Independence Comment
  PASA1741  Haplopappus apargioides Frank W. Peirson 1921-8-7 Inyo North Fork Bishop Creek 3047 Comment
  PASA1995  Cryptantha pterocarya var. cycloptera Frank W. Peirson 1928-4-2 Inyo Near Bradbury Well, Death Valley Region Comment
  POM13063  Tonestus peirsonii F. W. Peirson 1921-8-18 s.n. Inyo Taboose Pass, Sierra Nevada. 3277 Comment
  POM160271  Draba densifolia F. W. Peirson 1929-7-24 8549 Inyo Inconsolable Range 3659 Comment
  POM188541  Arabis repanda var. greenei F. W. Peirson 1933-8-8 10768 Inyo West of Heart Lake, Rock Creek Lake Basin 3506 Comment
  POM188542  Arabis lemmonii var. lemmonii F. W. Peirson 1933-8-4 10786 Inyo Rock Creek Lake Basin. Broken country S of Long Lake 3323 Comment
  POM203748  Saxifraga rivularis Mabel Peirson 1934-7-29 s.n. Inyo Rock Creek Lake Basin. Above Ruby Lake. 3506 Comment
  POM254385  Luzula orestera F. W. Peirson 1940-8-1 12966 Inyo Long Lake, Rock Creek Lake Basin. 3262 Comment
  POM254388  Draba sierrae F. W. Peirson 1940-8-5 12949 Inyo Rock Creek Lake Basin: steep east wall of canyon near Transverse Ridge 3415 Comment
  POM254401  Mimulus breweri F. W. Peirson 1940-8-10 12953 Inyo Shore of Ruby Lake near its outlet: Rock Creek Lake Basin, northern Inyo County. 3399 Comment
  POM256928  Calamagrostis canadensis F. W. Peirson 1940-8-13 12943 Inyo Rock Creek Lake Basin above Heart Lake Meadow 3232 Comment
  POM259422  Carex helleri F. W. Peirson 1937-8-4 s.n. Inyo Rock Creek Lake Basin. [west of Heart Lake] 3506 Comment
  RSA100547  Symphoricarpos vaccinioides F. W. Peirson 1930-8-3 9067 Inyo On margin of Heart Lake, Rock Creek Lake Basin. 3201 Comment
  RSA33880  Sphaeromeria cana F. W. Peirson 1930-8-7 9115 Inyo Rock Creek Lake Basin, Sierra Nevada, northern Inyo [Co.] 3354 Comment
  RSA384871  Elymus trachycaulus F. W. Peirson 1933-8-19 s.n. Inyo Rock Creek Lake Basin. 3323 Comment
  RSA65051  Silene bernardina F. W. Peirson 1913-8-22 610 Inyo Taboose Pass, Sierra Nevada. Comment
  RSA65407  Lewisia glandulosa F. W. Peirson 1931-7-20 9440 Inyo Mono Pass, Rock Creek Lake Basin. 3689 Comment
  RSA65511  Silene bernardina F. W. Peirson 1933-8-8 10769 Inyo West of Heart Lake, Rock Creek Lake Basin 3506 Comment
  RSA65843  Eriogonum microtheca var. ambiguum F. W. Peirson 1921-8-5 2616 Inyo Big Pine Creek, E. slope of Sierra Nevada. 2591 Comment
  RSA66136  Draba albertina F. W. Peirson 1935-7-17 11517 Inyo Meadows along upper end of Chickenfoot Lake, Rock Creek Lake Basin, Sierra Nevada 3293 Comment
  RSA66699  Arabis platysperma var. howellii F. W. Peirson 1929-7-22 8538 Inyo Among rocks, foot of steep trial on north slope of Bishop Pass 3506 Comment
  RSA69482  Luzula comosa F. W. Peirson 1933-8-13 10803 Inyo Heart Lake Meadow, Rock Creek Lake Basin, Sierra Nevada. 3232 Comment
  RSA69733  Luzula subcongesta F. W. Peirson 1939-8-7 12782 Inyo Middle Glacier Lake, Rock Creek Lake Basin. 3415 Comment
  RSA69735  Luzula orestera F. W. Peirson 1930-8-7 9116 Inyo Valley southward from Ruby Lake, Rock Creek Lake Basin. 3476 Comment
  RSA69852  Juncus drummondii F. W. Peirson 1934-7-23 11278 Inyo Rock Creek Lake Basin 3293 Comment
  RSA69853  Juncus drummondii F. W. Peirson 1931-7-22 9420 Inyo Lake in Upper Ruby stream, Rock Creek Lake Basin. 3537 Comment
  RSA70093  Juncus parryi F. W. Peirson 1930-8-4 9081 Inyo Upper Rock Creek Lake Basin. 3293 Comment
  RSA70404  Euphorbia incisa F. W. Peirson 1932-5-7 9925 Inyo North fork of Hanaupah Canyon, Panamint Mountains. 2134 Comment
  RSA71849  Gilia cana subsp. triceps F. W. Peirson 1932-5-6 9885 Inyo 2 miles west of Darwin. 1433 Comment
  RSA72139  Gayophytum diffusum subsp. parviflorum F. W. Peirson 1919-8-3 800 Inyo Small lake at 10500 ft. in Kearsarge Pass. 3201 Comment
  RSA74846  Phacelia frigida subsp. dasyphylla F. W. Peirson 1939-8-6 12889 Inyo West side of Ruby Lake, Rock Creek Lake Basin. 3399 Comment
  RSA78490  Salix arctica F. W. Peirson 1939-8-5 12996 Inyo East Chain Lakes, Rock Creek Lake Basin. Comment
  RSA78492  Holmgrenanthe petrophila F. W. Peirson 1946-4-19 13534 Inyo Titus Canyon, Death Valley. Comment
  RSA78493  Poa secunda F. W. Peirson 1946-4-19 13535 Inyo Titus Canyon, Death Valley. Comment
  RSA78495  Comandra umbellata subsp. californica F. W. Peirson 1946-4-19 13537 Inyo Titus Canyon, Death Valley. Comment
  RSA78504  Carex fissuricola F. W. Peirson 1940-8-18 13572 Inyo South of Long Lake, Rock Creek Lake Basin, northern Inyo County. 3262 Comment
  RSA78528  Carex subnigricans F. W. Peirson 1937-8-3 13584 Inyo Above Long Lake, Rock Creek Lake Basin. Comment
  RSA78552  Carex proposita F. W. Peirson 1940-8-16 13556 Inyo Rock Creek Lake Basin, Sierra Nevada 3293 Comment
  RSA79948  Cryptantha nubigena F. W. Peirson 1931-7-18 9594 Inyo East shore of Long Lake, Rock Creek Lake Basin. 3338 Comment
  RSA80356  Perideridia parishii subsp. latifolia F. W. Peirson 1930-8-9 9180 Inyo In Ruby Stream, Rock Creek Lake Basin, northern Inyo Co. 3323 Comment
  RSA80437  Antirrhinum filipes F. W. Peirson 1928-4-2 7782 Inyo About 1 mile south of Bradbury Well, Mojave Desert (Death Valley region). Comment
  RSA83977  Saxifraga aprica F. W. Peirson 1929-7-20 8499 Inyo Trail from South Lake to Green Lake, Bishop Creek. 3277 Comment
  RSA84429  Aquilegia pubescens F. W. Peirson 1929-7-19 8490 Inyo Bishop Creek at South Lake. 3018 Comment
  RSA85034  Pellaea breweri F. W. Peirson 1931-7-18 9393 Inyo East shore of Long Lake, Rock Creek Lake Basin 3262 Comment
  RSA85246  Spiraea densiflora var. splendens F. W. Peirson 1921-8-8 1954 Inyo East slope of Piute Pass. 3354 Comment
  RSA85743  Potentilla flabellifolia F. W. Peirson 1931-7-19 9478 Inyo Rock Creek Lake Basin, Sierra Nevada. 3354 Comment
  RSA85786  Potentilla glandulosa subsp. nevadensis F. W. Peirson 1930-8-3 9066 Inyo On margin of Heart Lake, Rock Creek Lake Basin. 3201 Comment
  RSA86359  Pinus longaeva F. W. Peirson 1939-8-5 12773 Inyo Near Heart Lake, Rock Creek Lake Basin 3232 Comment
  RSA86708  Elymus F. W. Peirson 1931-7-17 9408 Inyo Meadow about Heart Lake, Rock Creek Lake Basin. 3201 Comment
  RSA86797  Rosa woodsii subsp. gratissima F. W. Peirson 1931-7-21 9471 Inyo Heart Lake, Rock Creek Lake Basin. 3232 Comment
  RSA87003  Forestiera pubescens F. W. Peirson 1919-8-1 s.n. Inyo Independence. Comment
  RSA87129  Trisetum spicatum F. W. Peirson 1931-7-20 9403 Inyo Ruby Falls, Rock Creek Lake Basin, east slope of Sierra Nevada. 3323 Comment
  RSA88782  Carex scopulorum var. bracteosa F. W. Peirson 1929-7-19 8479 Inyo Bishop Creek at South Lake 3018 Comment
  RSA92305  Poa fendleriana F. W. Peirson 1932-5-7 9913 Inyo North fork of Hanaupah Canyon, Panamint Mountains. 2134 Comment
  RSA92320  Poa secunda F. W. Peirson 1932-5-7 9914 Inyo North fork of Hanaupah Canyon, Panamint Mountains. 2134 Comment
  SBBG51149  Delphinium polycladon F. W. Peirson 1939-8-6 Inyo Ruby Lake, above Rock Crk Lake Comment
  SD87638  Hymenoxys hoopesii Frank W. Peirson 1929-7-24 8555 Inyo Green Lake Region, Bishop Creek. 32 Comment
  SD87670  Spiraea densiflora Frank W. Peirson 1921-8-8 1954 Inyo Piute Pass, east slope Comment
  SD87707  Monardella linoides subsp. sierrae Frank W. Peirson 1927-7-24 7543 Inyo Westgard Pass. 2133 Comment
  SD87869  Phoenicaulis cheiranthoides Frank W. Peirson 1929-7-20 8511 Inyo Green Lake Valley, below Green Lake, Bishop Creek. 3265 Comment
  SEINET179667 Image available Poa stebbinsii Frank W. Peirson 1933-8-9 10821 Inyo Rock Creek Lake Basin, recess on east shore. 3292 Comment
  UC1026431  Carex pellita F. W. Peirson 1940-8-17 13561 Inyo Heart Lake Meadow Rock Creek Lake Basin 3200 Comment
  UC1516290  Mimulus breweri Frank W. Peirson 1933-8-6 10774 Inyo on the escarpment w Heart Lake Meadow; Rock Creek Lake Basin 3230 Comment
  UC483091  Salix exigua Frank W. Peirson 1932-5-6 9900 a Inyo <Wild> Rose Canyon; Panamint Mts. 1143 Comment
  UC501444  Gilia cana subsp. triceps Frank W. Peirson 1932-5-6 9902 Inyo Wild Rose Canyon , Wild Rose Canyon (Panamint Mts.) 1143 Comment
  UC501475  Chylismia claviformis subsp. funerea Frank W. Peirson 1928-4-3 7818 Inyo McLean Spring Death Valley Comment
  UC511726  Isoetes occidentalis Frank W. Peirson 1933-8-11 10800 Inyo small lake e of Heart Lake (Rock Creek); Lake Basin 3200 Comment
  UC511849  Thalictrum sparsiflorum Frank W. Peirson 1933-8-19 Inyo near Ruby Falls; Rock Creek Lake Basin 3322 Comment
  UC511866  Juncus parryi Frank W. Peirson 1933-8-4 Inyo Rock Creek Lake Basin, south of Long Lake 3352 Comment
  UC511882  Draba lemmonii Frank W. Peirson 1933-8-9 Inyo Rock Creek Lake Basin 3474 Comment
  UC511883  Potentilla gracilis var. fastigiata Frank W. Peirson 1933-8-8 10809 Inyo w Heart Lake (Rock Creek Lake Basin); , w of Heart Lake 3322 Comment
  UC511885  Trisetum spicatum Frank W. Peirson 1933-8-15 Inyo below Mono Pass; Rock Creek Basin 3505 Comment
  UC511890  Erigeron clokeyi var. pinzliae Frank W. Peirson 1933-8-5 10787 Inyo Rock Cr. Lake Basin 3291 Comment
  UC511892  Limosella aquatica Frank W. Peirson 1933-8-20 10791 Inyo Rock Creek Lake Basin, Heart Lake Meadow 3200 Comment
  UC511893  Perideridia parishii subsp. latifolia Frank W. Peirson 1933-8-19 10792 Inyo Ruby Falls Rock Cr. Lake Basin 3322 Comment
  UC511895  Silene bernardina Frank W. Peirson 1933-8-8 10769 Inyo steep mountain slope w Heart Lake; Rock Cr Lake Basin, w of Heart Lake 3352 Comment
  UC599243  Leymus triticoides Frank W. Peirson 1938-7-8 12415 Inyo w Alabama Hills; Lone Pine Creek 1524 Comment
  UC599258  Calamagrostis muiriana Frank W. Peirson 1934-7-20 12617 Inyo Ruby Falls, Rock Creek Lake Basin 3322 Comment
  UC643206  Draba sierrae Frank W. Peirson 1940-8-5 12949 Inyo steep e wall of canyon near the Transverse Ridge Rock Creek Lake Basin Rock Creek Lake Basin 3413 Comment
  UC643229  Hulsea algida Frank W. Peirson 1940-8-9 Inyo on e side of canyon Rock Creek Lake Basin 3307 Comment
  UC837234  Carex buxbaumii Frank W. Peirson 1940-8-19 12946 Inyo Rock Creek Lake Basin 3261 Comment
  UC909121  Linanthus demissus Frank W. Peirson 1928-4-2 7783 Inyo near Bradbury Well; Death Valley Region Comment
  UCD50947  Achnatherum occidentale F. W. Peirson 1934-7-24 s.n. Inyo Rock Creek Lake Basin. 3352 Comment
  UCD59146  Bromus carinatus var. marginatus F. W. Peirson 1940-8-6 s.n. Inyo Rock Creek Lake Basin. Slope west of Hart Lake. 3276 Comment
Read comments
Aug 19 2014
  UCD93742  Trisetum spicatum F. W. Peirson 1933-8-8 s.n. Inyo Rock Creek Lake Basin, west of Heart Lake. 3352 Comment
  UCD93743  Trisetum spicatum F. W. Peirson 1933-8-21 10870 Inyo Sierra Nevada, Rock Creek Lake Basin, upper Ruby Lake. 3505 Comment
  UCR136633  Salvia funerea F. W. Peirson 1932-5-8 9940 Inyo Funeral Mountains, Hole-in-the-Rock Spring, Boundary Canyon, slopes along trail to spring 945 Comment
  CAS-BOT-BC110798  Juncus mertensianus Frank W. Peirson 1939-8-7 12783 Inyo Rock Creek Lake Basin. In the main gorge south of Long Lake. 3322 Comment
  CAS-BOT-BC119626  Carex nigricans Frank Warrington Peirson 1935-7-17 11704 Inyo Rock Creek Lake Basin, dryish meadows near the Morgan Pass lakes. Comment
  CAS-BOT-BC17983  Carex aquatilis Frank W. Peirson 1933-8-11 10834 Inyo Rock Creek Lake Basin. Along East Chain Lakes. 3200 Comment
  CAS-BOT-BC20930  Carex heteroneura Frank W. Peirson 1933-8-11 10842 Inyo Rock Creek Lake Basin. Meadows along the East Chain of Lakes. 3200 Comment
  CAS-BOT-BC21177  Carex fissuricola Frank W. Peirson 1934-7-25 s.n. Inyo Rock Creek Lake Basin. South of Long Lake. 3276 Comment
  CAS-BOT-BC389804  Silene sargentii Frank W. Peirson 1937-8-7 s.n. Inyo Rock Creek Lake Basin. In the main gorge south of Long Lake 3291 Comment
  CAS-BOT-BC39771  Descurainia californica Frank W. Peirson 1931-7-17 9457 Inyo Rock Creek Lake Basin. Along escarpment west of Heart Lake. 3230 Comment
  JEPS22391  Stellaria calycantha Frank W. Peirson 1937-8-6 12181 Inyo Rock Creek Lake Basin; in the Grass Bog on the e side 3291 Comment
  JEPS22395  Boechera stricta Frank W. Peirson 1937-8-10 12192 Inyo Ruby Falls Rock Creek Lake Basin 3322 Comment
  JEPS27459  Astragalus lentiginosus var. ineptus Frank W. Peirson 1937-8-8 Inyo between the glacial ridges along the summit of the Transverse Ridge Rock Creek Lake Basin Rock Creek Lake Basin, summit of Transverse Ridge 3352 Comment
  JEPS41249  Jamesia americana var. rosea Frank W. Peirson 1917-1 11 Inyo near The Palisades High Sierra Comment
Read comments
Jul 6 2010
  JEPS5604  Ranunculus eschscholtzii Frank W. Peirson 1931-7-26 9450 Inyo dry stream valley s Long Lake; Rock Creek Lake Basin 3276 Comment
  OBI21191  Luzula parviflora Frank W. Peirson 1937-8-10 Inyo Along stream tributary to Ruby Creek below the falls, Rock creek Lake Basin 3322 Comment
  PASA1167  Mentha canadensis Frank W. Peirson 1921-8-2 Inyo Owens River, 2 miles north of Lone Pine 1219 Comment
  PASA1733  Erigeron lonchophyllus Frank W. Peirson 1919-8-3 Inyo Onion Valley on the Kearsarge Trail 2743 Comment
  PASA2792  Hulsea F. W. Peirson 1921-8-18 Inyo Taboose 3276 Comment
  POM203381  Drymocallis pseudorupestris var. crumiana F. W. Peirson 1934-7-21 11272 Inyo Rock Creek Lake Basin. Recess or cirque on E slope, rocky talus slope far above the cirque floor 3506 Comment
  POM203756  Cistanthe rosea F. W. Peirson 1934-7-21 11269 Inyo Rock Creek Lake Basin. 3216 Comment
  POM203759  Mimulus primuloides F. W. Peirson 1934-7-23 11276 Inyo Heart Lake Meadow, Rock Creek Lake Basin. 3216 Comment
  POM203763  Leptosiphon nuttallii F. W. Peirson 1934-7-23 11275 Inyo Heart Lake Meadow, Rock Creek Lake Basin. 3216 Comment
  POM212868  Castilleja peirsonii F. W. Peirson 1935-7-17 11663 Inyo Near Morgan Pass Lakes, Rock Creek Lake Basin, northern Inyo County. 3323 Comment
  POM254393  Epilobium anagallidifolium F. W. Peirson 1940-8-9 12970 Inyo Above upper lake on east side of Rock Creek Lake Basin. 3293 Comment
  POM254402  Potentilla gracilis var. elmeri F. W. Peirson 1940-8-1 12962 Inyo Heart Lake Meadow, Rock Creek Lake Basin, Sierra Nevada. 3232 Comment
  POM257988  Carex jonesii F. W. Peirson 1937-8-4 s.n. Inyo Escarpment at Heart Lake, Rock Creek Lake Basin. 3232 Comment
  RSA0005760  Galium munzii var. subalpinum F. W. Peirson 1919-7-27 1189 Inyo Sawmill Creek, east slope of Sierra Nevada. 2957 Comment
  RSA0009290  Lupinus lepidus var. confertus F. W. Peirson 1930-8-3 9055 Inyo Shores of Heart Lake, Rock Creek Lake Basin 3200 Comment
  RSA0029705  Delphinium polycladon F. W. Peirson 1929-6-22 8526 Inyo trail east of Long Lake, Bishop Creek. 3293 Comment
  RSA0125050  Senecio integerrimus var. exaltatus F. W. Peirson 1930-8-3 9050 Inyo On margin of Heart Lake, Rock Creek Lake Basin. 3201 Comment
  RSA30895  Carex rostrata F. W. Peirson 1930-8-3 9073 Inyo east of Heart Lake, Rock Creek Lake Basin. 3200 Comment
  RSA64704  Eriogonum spergulinum var. reddingianum F. W. Peirson 1931-7-17 9434 Inyo Near Ruby Falls; Rock Creek Lake Basin, Sierra Nevada. 3445 Comment
  RSA65096  Eriogonum lobbii F. W. Peirson 1914-8-5 1769 a Inyo Coyote Pass, Sierra Nevada. 3201 Comment
  RSA65714  Silene bridgesii F. W. Peirson 1911-1 612 Inyo Sierra Nevada Comment
  RSA66008  Eriogonum rosense F. W. Peirson 1917-8-20 1752 Inyo Sierra Nevada: Green Lake region. Coyote Creek Promontory 3354 Comment
  RSA66010  Eriogonum rosense F. W. Peirson 1933-8-5 10778 Inyo Upper part of the Transverse Ridge, Rock Creek Lake Basin. 3415 Comment
  RSA66513  Arabis platysperma var. howellii F. W. Peirson 1931-7-20 9454 Inyo Abundant in defile S of Mono Pass, Rock Creek Lake Basin 3628 Comment
  RSA66524  Arabis holboellii var. pinetorum F. W. Peirson 1930-8-9 11323 Inyo Along the Ruby Lake stream, Rock Creek Lake Basin 3293 Comment
  RSA66797  Arabis drummondii F. W. Peirson 1929-7-21 8517 Inyo Dry soil East side of South Lake, Bishop Creek. 2988 Comment
  RSA66813  Stanleya pinnata F. W. Peirson 1921-8-2 2593 Inyo Owens River, 2 miles north of Lone Pine. Comment
  RSA69028  Dodecatheon alpinum subsp. majus F. W. Peirson 1937-8-3 s.n. Inyo Chickenfoot Lake, Rock Creek Lake Basin. Alt. 10,880 ft. 3317 Comment
  RSA69550  Mentzelia oreophila F. W. Peirson 1932-5-6 9894 Inyo 2 miles east of Darwin. 1372 Comment
  RSA69602  Sagittaria latifolia F. W. Peirson 1914-4-27 1545 Inyo Bishop. Comment
  RSA69651  Goodyera oblongifolia Frank W. Peirson 1911-1 1698 Inyo Sierra Nevada Comment
  RSA69741  Luzula parviflora F. W. Peirson 1921-8-7 2642 Inyo East slope of Piute Pass, Sierra Nevada. 3354 Comment
  RSA69773  Gentiana newberryi F. W. Peirson 1931-7-25 9483 Inyo Rock Creek Lake Basin. near Heart lake. 3201 Comment
  RSA70580  Sisyrinchium idahoense Frank W. Peirson 1933-8-6 10773 Inyo Heart Lake Meadow, Rock Creek Lake Basin, Sierra Nevada. 3232 Comment
  RSA72033  Polemonium occidentale F. W. Peirson 1930-8-8 9141 Inyo East of Heart Lake, Rock Creek Lake Basin 3201 Comment
  RSA72119  Epilobium obcordatum F. W. Peirson 1930-8-5 9088 Inyo Along stream course from Mono Pass and west of Ruby Lake; Rock Creek Lake Basin; Sierra Nevada. 3506 Comment
  RSA72156  Gayophytum diffusum subsp. parviflorum F. W. Peirson 1930-8-7 9127 Inyo Rock Creek Lake Basin, Sierra Nevada 3399 Comment
  RSA74154  Phacelia vallis-mortae F. W. Peirson 1932-5-9 9949 Inyo Stream bed below Keane Spring, Funeral Mts. 1220 Comment
  RSA77836  Hackelia micrantha F. W. Peirson 1930-8-7 9132 Inyo Ruby Lake, Rock Creek Lake Basin, extreme northern Inyo Co. 3399 Comment
  RSA78548  Carex utriculata F. W. Peirson 1940-8-17 13569 Inyo Heart Lake Meadow, Rock Creek Lake Basin. northern Inyo County. 3232 Comment
  RSA78550  Carex F. W. Peirson 1940-8-17 13554 Inyo Heart Lake Meadow, Rock Creek Lake Basin. Comment
  RSA78638  Castilleja angustifolia F. W. Peirson 1946-4-20 13541 Inyo Gray's Camp. Comment
  RSA79857  Penstemon speciosus F. W. Peirson 8496 Inyo Trail from South Lake to Green Lake, Bishop Creek. 3262 Comment
  RSA80044  Veronica alpina var. alterniflora F. W. Peirson 1931-7-17 s.n. Inyo Stream from Ruby Lake, Rock Creek Lake Basin, Sierra Nevada. 3354 Comment
  RSA80198  Penstemon speciosus F. W. Peirson 1911-8-7 1115 Inyo Little Cottonwood Creek, east slope of Sierra Nevada. Comment
  RSA80750  Cryptantha racemosa F. W. Peirson 1936-4-6 11806 Inyo open place in canyon where small stream occurs, Titus Canyon, Death Valley. 1067 Comment
  RSA84603  Heuchera rubescens var. rydbergiana F. W. Peirson 1931-7-24 9462 Inyo west side of Long Lake, Rock Creek Lake Basin. 3277 Comment
  RSA84861  Ranunculus eschscholtzii F. W. Peirson 1933-8-10 10783 Inyo slopes above Ruby Lake, Rock Creek Lake Basin. Northern Inyo Co. 3476 Comment
  RSA85043  Pellaea breweri F. W. Peirson 1940-8-5 12989 Inyo at south base of the Transverse Ridge, Rock Creek Lake Basin, Sierra Nevada 3277 Comment
  RSA85742  Potentilla flabellifolia F. W. Peirson 1940-8-2 12960 Inyo Along grassy border of stream from below Ruby Lake Basin, northern Inyo Co. 3390 Comment
  RSA86184  Cryptogramma acrostichoides F. W. Peirson 1931-7-27 9392 Inyo Ruby Mountain, Rock Creek Lake Basin 3323 Comment
  RSA86194  Cystopteris fragilis F. W. Peirson 1930-8-9 9158 Inyo In Ruby Stream, Rock Creek Lake Basin, northern Inyo Co. 3323 Comment
  RSA86327  Ivesia lycopodioides subsp. megalopetala F. W. Peirson 1930-8-3 9052 Inyo West side of Heart Lake, Rock Creek Lake Basin, northern Inyo county 3201 Comment
  RSA87002  Celtis reticulata F. W. Peirson 1917-8-1 1474 Inyo in chaparral west of Robinson's, Independence. Comment
  RSA88729  Carex aquatilis F. W. Peirson 1934-7-23 s.n. Inyo Rock Creek Lake Basin 3232 Comment
  RSA88869  Carex whitneyi F. W. Peirson 1931-7-24 9415 Inyo West shore of Long Lake, Rock Creek Lake Basin, Sierra Nevada. 3262 Comment
  RSA90239  Astragalus hornii F. W. Peirson 1919-8-2 2002 Inyo Along Owens River, 2 miles N of Lone Pine. Comment
  RSA90267  Agrostis variabilis F. W. Peirson 1934-7-23 12616 Inyo Above East Chain Lakes, Rock Creek Lake Basin, Sierra Nevada, extreme northern Inyo County. 3262 Comment
  RSA90449  Glycyrrhiza lepidota F. W. Peirson 1919-8-2 573 Inyo Along Owens River, 2 miles N of Lone Pine. Comment
  RSA90861  Carex subnigricans F. W. Peirson 1937-8-3 12208 Inyo Chickenfoot Lake, Rock Creek Lake Basin. 3293 Comment
  RSA90966  Erigeron clokeyi F. W. Peirson 1911-8-8 1290 Inyo Cottonwood Creek, Sierra Nevada. Comment
  RSA91004  Erigeron petiolaris F. W. Peirson 1929-7-22 8540 Inyo Bishop Pass 3659 Comment
  RSA91050  Carex microptera F. W. Peirson 1933-8-5 10844 Inyo North slope, Tranverse Ridge, Rock Creek Lake Basin, northern Inyo County. 3323 Comment
  RSA91052  Carex microptera F. W. Peirson 1930-8-5 9104 Inyo Gorge east of Mono Pass, Rock Creek Lake Basin 3598 Comment
  RSA91179  Lupinus inyoensis F. W. Peirson 1930-8-6 9108 Inyo Rock Creek Lake Basin, northern Inyo County. 3110 Comment
  RSA91490  Eriophorum crinigerum F. W. Peirson 1930-8-8 9147 Inyo West of Heart Lake, Rock Creek Lake Basin 3201 Comment
  RSA91587  Carex deflexa var. boottii F. W. Peirson 1937-8-7 12211 Inyo Southwest part of Rock Creek Lake Basin, northern Inyo County. 3354 Comment
  RSA91654  Trisetum spicatum F. W. Peirson 1933-8-21 10870 Inyo Ruby Lake, Rock Creek Lake Basin, northern Inyo County. 3506 Comment
  RSA91686  Poa secunda F. W. Peirson 1933-8-15 10868 Inyo Rock Creek Lake Basin, Inyo. 3506 Comment
  RSA92138  Eleocharis quinqueflora F. W. Peirson 1937-8-3 s.n. Inyo Above Long Lake, Rock Creek Lake Basin. Comment
  RSA92314  Poa nervosa F. W. Peirson 1934-7-20 11314 Inyo Rock Creek Lake Basin, Northern Inyo County. Along stream in Ruby Gorge. 3262 Comment
  RSA92399  Bebbia juncea F. W. Peirson 1930-4-15 8725 Inyo Near Amargosa River 9 miles south of Shoshone. Comment
  RSA92667  Eriophyllum lanatum var. integrifolium F. W. Peirson 1917-8-20 1388 Inyo Region of Green Lake, tributary to the South Fork of Bishop Creek 3354 Comment
  RSA92709  Salix arctica F. W. Peirson 1933-8-9 10850 Inyo Rock Creek Lake Basin. 3476 Comment
  RSA92857  Chaenactis alpigena F. W. Peirson 1921-8-7 2633 Inyo N side of Coyote Pass 3201 Comment
  RSA93001  Erigeron clokeyi F. W. Peirson 1939-8-4 12771 Inyo Near one of the E Chain lakes, Rock Creek lake Basin, Northern Inyo County. 3293 Comment
  RSA93004  Erigeron clokeyi F. W. Peirson 1940-8-3 12964 Inyo Rock Creek Lake Basin, slope west of Heart Lake. 3293 Comment
  RSA93087  Erigeron pygmaeus F. W. Peirson 1921-8-8 2525 Inyo Piute Pass, Sierra Nevada. 3277 Comment
  RSA93184  Machaeranthera canescens F. W. Peirson 1921-8-6 2526 Inyo Trail out of Big Pine to Baker Creek, Sierra Nevada 3125 Comment
  RSA93654  Antennaria pulchella F. W. Peirson 1940-8-9 12957 Inyo Above upper lake on east side of Rock Creek Lake Basin. 3293 Comment
  RSA93660  Solidago multiradiata F. W. Peirson 1921-8-5 2637 Inyo Big Pine Creek 2287 Comment
  RSA93721  Ageratina occidentalis F. W. Peirson 1940-8-15 12956 Inyo Foot of rock wall west of Heart Lake, Rock Creek Lake Basin, northern Inyo co. 3384 Comment
  RSA93724  Ageratina occidentalis F. W. Peirson 1919-8-27 1212 Inyo Sawmill Canyon 2927 Comment
  RSA93732  Acamptopappus shockleyi F. W. Peirson 1932-5-6 9903 Inyo Wild Rose Canyon, Panamint Mts. 1143 Comment
  RSA93735  Amphipappus fremontii F. W. Peirson 1932-5-6 9898 Inyo 8 mi. E of Darwin 1220 Comment
  RSA93850  Baileya pleniradiata F. W. Peirson 1921-8-2 2774 Inyo 1 miles S of Olanche, Owens Valley Comment
  RSA94409  Artemisia ludoviciana subsp. incompta F. W. Peirson 1930-8-7 9114 Inyo Small stream flowing into west side of Long Lake, Rock Creek Lake Basin. 3293 Comment
  RSA94417  Eriophyllum ambiguum var. paleaceum F. W. Peirson 1932-5-6 9893 Inyo 2 miles east of Darwin. 1372 Comment
  RSA94508  Arnica mollis F. W. Peirson 1940-8-14 12979 Inyo Rock Creek Lake Basin 3232 Comment
  RSA94510  Arnica mollis F. W. Peirson 1930-8-4 9076 Inyo Upper Rock Creek Lake Basin. 3293 Comment
  RSA94512  Arnica nevadensis F. W. Peirson 1931-7-25 9596 Inyo Heart Lake, Rocky Creek Lake Basin, northern Inyo county 3232 Comment
  RSA94513  Arnica nevadensis F. W. Peirson 1930-8-5 9099 Inyo Gorge east of Mono Pass, Rock Creek Lake Basin 3628 Comment
  RSA94515  Arnica amplexicaulis F. W. Peirson 1930-8-9 9159 Inyo In Ruby Stream, Rock Creek Lake Basin, northern Inyo Co. 3323 Comment
  RSA94524  Raillardella argentea F. W. Peirson 1921-8-6 4246 Inyo Near Coyote Pass, Sierra Nevada 3232 Comment
  RSA94573  Artemisia cana F. W. Peirson 1940-8-17 12986 Inyo Heart Lake Meadow, Rock Creek Lake Basin. northern Inyo County. 3232 Comment
  RSA94614  Syntrichopappus fremontii F. W. Peirson 1932-5-5 9878 Inyo Red lava formation, foot of red volcanic cone north of Little Lake, western Inyo Co. 1098 Comment
  RSA94699  Senecio werneriifolius F. W. Peirson 1929-7-22 8533 Inyo Trail southward from Long Lake, Bishop Creek region 3415 Comment
  RSA94748  Packera pauciflora F. W. Peirson 1931-7-24 9510 Inyo West shore of Long Lake, Rock Creek Lake Basin, Sierra Nevada. 3262 Comment
  RSA94752  Senecio douglasii var. monoensis F. W. Peirson 1936-4-6 11809 Inyo Titus Canyon, Death Valley region 1067 Comment
  RSA94812  Hecastocleis shockleyi F. W. Peirson 1936-4-6 11804 Inyo Above Titus Canyon. (near the Nevada state line) 2012 Comment
  RSA94872  Arnica chamissonis subsp. foliosa F. W. Peirson 1921-8-5 22571 Inyo Big Pine Creek, east slope of Sierra Nevada. 2744 Comment
  RSA95106  Crepis acuminata F. W. Peirson 1931-7-18 9514 Inyo Detritus below Long Lake, Rock Creek Lake Basin. 3232 Comment
Read comments
Nov 12 2010
  RSA95185  Atrichoseris platyphylla F. W. Peirson 1928-4-2 7776 Inyo About 1 mile east of Bradbury Well; Death Valley Region. Comment
  SD87684  Erigeron clokeyi Frank W. Peirson 1940-8-3 12964 Inyo RockCreek Basin, west of Heart Lake in area of seepage 3290 Comment
  SD87775  Potentilla flabellifolia Frank W. Peirson 1940-8-2 12960 Inyo Rock Creek Lake Basin, on grassy border of the stream below Ruby Lake 3383 Comment
  SEINET7548181 Image available Carex abrupta Frank W. Peirson 1933-8-11 10845 Inyo Rock Creek Lake Basin 3200 Comment
  SEINET7575690 Image available Carex specifica Frank W. Peirson 1933-8-13 10849 Inyo Rock Creek Lake Basin. 3200 Comment
  SEINET7579833 Image available Carex vernacula Frank W. Peirson 1933-8-12 10846 Inyo Rock Creek Lake Basin. 3383 Comment
  UC511901  Pyrrocoma racemosa var. sessiliflora Frank W. Peirson 1933-8-23 10851 Inyo about 6 mi Lone Pine 1127 Comment
  UC570555  Castilleja parviflora Frank W. Peirson 1935-7-17 11663 Inyo near Morgan Pass Lakes; Rock Creek Lake Basin 3322 Comment
  UC570572  Lewisia pygmaea Frank W. Peirson 1935-7-16 11515 Inyo at foot of Ruby Lake Rock Creek Lake Basin, Ruby Lake 3398 Comment
  CAS-BOT-BC16346  Athysanus unilateralis Frank W. Peirson 1925-3-19 5482 Kern North slope Tehachapi Pass. 609 Comment
  CAS-BOT-BC201411  Lupinus albifrons var. albifrons Frank W. Peirson 1930-5-13 8830 Kern Kern River 844 Comment
  CAS-BOT-BC217848  Perideridia pringlei Frank W. Peirson 1933-7-9 10687 Kern Road from Caliente to Bodfish and bout 6 mi. S. of Bodfish Comment
  CAS-BOT-BC412699  Hollisteria lanata Frank W. Peirson 1933-7-10 10703 Kern Road from Woody to Bakersfield, about 20 miles from Bakersfield Comment
  JEPS1087  Phacelia purpusii Frank W. Peirson 1933-7-9 10702 Kern in clearing along Power Line near Summit Camp (summit of mts.); Greenhorn Mts. 2072 Comment
  JEPS23433  Camissonia kernensis subsp. kernensis Frank W. Peirson 9960 Kern e slope Walker Pass; Sierra Nevada 1371 Comment
  JEPS55307  Lathyrus sulphureus Frank W. Peirson 1933-7-9 10689 Kern s from Summit Camp; Summit Greenhorn Mts. 2072 Comment
  JEPS56457  Eriogonum pusillum Frank W. Peirson 1928-4-4 7831 Kern 15 mi on way to Mojave Randsburg; San Gabriel Mts. Comment
  JEPS65607  Pediomelum californicum Frank W. Peirson 1933-7-9 10686 Kern road from Caliente to Bodfish about 6 mi s Bodfish; s of Bodfish Comment
  PASA2006  Amsinckia vernicosa Frank W. Peirson 1925-3-19 Kern North slope of Tehachapi Pass 761 Comment
  PASA2200  Chaenactis xantiana Frank W. Peirson 1930-5-14 Kern Greenhorn Range, east slope 1462 Comment
  PASA337  Scorzonella sylvatica Frank W. Peirson 1930-5-15 Kern Hills SE. of Glenville, Greenhorn Mts. Comment
  PASA588  Mirabilis laevis var. retrorsa Frank W. Peirson 1930-5-12 Kern 8 miles east of Mohave Comment
  POM171913  Collinsia sparsiflora var. collina F. W. Peirson 1930-5-14 8850 Kern Greenhorn Range, east slope 1524 Comment
  POM212879  Phacelia douglasii var. petrophila F. W. Peirson 1935-3-16 11403 Kern Mojave Desert, 1-2 miles N of the Grapevine Grade. Comment
  RSA100276  Plectritis ciliosa subsp. insignis F. W. Peirson 1930-5-15 3500 Kern Greenhorn Range, in hills northwest of Glenville 1067 Comment
  RSA614277  Microseris sylvatica F. W. Peirson 1924-3-19 5491 Kern north slope of Tehachapi Pass. 610 Comment
  RSA65003  Hollisteria lanata F. W. Peirson 1933-7-10 10703 Kern 20 miles from Bakersfield on road to Woody. Comment
  RSA65078  Eriogonum gossypinum F. W. Peirson 1925-3-19 5728 Kern Caliente Creek near foot of Tehachapi Grade. Comment
  RSA65257  Chorizanthe spinosa F. W. Peirson 1927-5-29 7336 Kern Red Rock Canyon, west end of Mojave Desert. 762 Comment
  RSA66808  Streptanthella longirostris F. W. Peirson 1927-5-7 7272 Kern Muroc (10 miles south) Comment
  RSA68667  Calochortus amoenus Frank W. Peirson 1930-5-15 8876 Kern Greenhorn Range (hills south of Glenville) 1067 Comment
  RSA69493  Mirabilis laevis var. retrorsa F. W. Peirson 1930-5-13 8900 Kern Red Rock Canyon. 884 Comment
  RSA69701  Mentzelia montana F. W. Peirson 1930-5-14 8845 Kern Road from Kernville to Glenville, Greenhorn Range (east slope) 1463 Comment
  RSA70158  Dichelostemma capitatum subsp. capitatum F. W. Peirson 1933-7-9 10697 Kern About 2 mile S of Summit Camp, Greenhorn Mtns. 2073 Comment
  RSA70163  Dichelostemma capitatum subsp. capitatum F. W. Peirson 1925-3-19 5489 Kern N slope of Tehachapi Pass. 610 Comment
  RSA70464  Allium lacunosum var. kernense F. W. Peirson 1927-5-28 7317 Kern Isabella to Kernville. Comment
  RSA71883  Gilia leptantha subsp. purpusii F. W. Peirson 1908-7-11 127 Kern Little Kern River, Southern Sierra Nevada. Comment
  RSA72294  Aliciella hutchinsifolia F. W. Peirson 1932-1-5 9870 Kern Small side canyon, Red Rock Canyon, southwestern Mojave Desert. 884 Comment
  RSA72662  Balsamorhiza deltoidea F. W. Peirson 1930-5-15 8893 Kern Greenhorn Range, in hills northwest of Glenville 1067 Comment
  RSA73066  Leptosiphon montanus F. W. Peirson 1930-5-15 8896 Kern Greenhorn Range, in hills northwest of Glenville 1067 Comment
  RSA74145  Phacelia distans F. W. Peirson 1930-5-13 8818 Kern 5 miles north of Ricardo, Indian Wells Valley 1006 Comment
  RSA75403  Camissonia boothii subsp. desertorum F. W. Peirson 1930-5-13 8811 Kern Red Rock Canyon. 884 Comment
  RSA75693  Camissonia campestris subsp. campestris F. W. Peirson 1925-3-20 5530 Kern 20 miles S of Bakersfield Comment
  RSA75894  Nemophila maculata F. W. Peirson 1930-5-14 8866 Kern Greenhorn Range on road from Kernville to Glenville 1677 Comment
  RSA77047  Sphaeralcea ambigua subsp. monticola F. W. Peirson 1922-5-13 4108 Kern Granite Wells, w. Mojave Desert Comment
  RSA77423  Petalonyx thurberi F. W. Peirson 1921-8-2 2800 Kern E os Mojave, Kern County Comment
  RSA87309  Lupinus chamissonis F. W. Peirson 1930-5-13 8829 Kern Near Kern River. 845 Comment
  UC511746  Collinsia torreyi var. brevicarinata Frank W. Peirson 1933-7-9 10693 Kern ca 2 mi s Summit Camp; Greenhorn Mtns 2072 Comment
  UC511904  Perideridia pringlei Frank W. Peirson 1933-7-9 10687 Kern about 6 mi s Bodfish (road from Caliente to Bodfish) Comment
  UC908511  Gilia brecciarum subsp. neglecta Frank W. Peirson 1928-4-4 7824 Kern on the Trona Road 11 mi n Johannesburg; 11 mi n Johannesburg Comment
  CAS-BOT-BC438076  Lithophragma parviflorum Frank W. Peirson 1930-5-15 8889 Kern hills nw of Glenville, Greenhorn mts. 1066 Comment
  CAS-BOT-BC89942  Lepidium nitidum Frank W. Peirson 1925-3-19 5506 Kern North slope of Tehchapi. 457 Comment
  PASA779  Gilia capitata Frank W. Peirson 1940-5-14 Kern Greenhorn Range, east slope 1523 Comment
  RSA0024764  Ribes roezlii F. W. Peirson 1933-7-9 10700 Kern Power line clearing at summit of Greenhorn Mountains. 2073 Comment
  RSA0105417  Acmispon procumbens var. procumbens F. W. Peirson 1937-5-30 12076 Kern Open flat ca. 1 mile below the White Oak Lodge. Cottonwood Creek, Tehachapi Mts. 1524 Comment
  RSA0121151  Eriastrum pluriflorum subsp. albifaux F. W. Peirson 1927-5-29 7332 Kern 10 miles north of Red Rock canyon, Indian Wells Valley, Western Mojave Desert. Comment
  RSA66821  Caulanthus cooperi F. W. Peirson 1935-3-16 11408 Kern South slope of Tehachapi Range and 4 miles north of Mojave Comment
  RSA73684  Leptosiphon bicolor F. W. Peirson 1925-3-19 5508 Kern North slope of Tehachapi Mountains. 457 Comment
Read comments
Mar 27 2011
  RSA74158  Phacelia tanacetifolia F. W. Peirson 1930-5-12 8794 Kern 11 miles south of Mohave [Mojave]. Comment
  RSA80159  Plagiobothrys canescens F. W. Peirson 1925-3-19 5505 Kern North slope of Tehachapi Mountains 457 Comment
  RSA87051  Lupinus benthamii var. benthamii F. W. Peirson 1925-3-19 5492 Kern North slope of Tehachapi Pass. 610 Comment
  RSA90730  Astragalus oxyphysus F. W. Peirson 1925-3-20 5535 Kern In fields 18 miles N of Bakersfield. Comment
  RSA92046  Bromus hordeaceus F. W. Peirson 1937-5-30 12081 Kern Ca. 2 miles above White Oak Lodge, Cottonwood Creek, Tahachapi Mountains. 1677 Comment
  RSA95078  Microseris sylvatica F. W. Peirson 1928-4-5 7836 Kern North slope of Tehachapi Pass 610 Comment
  RSA95337  Ceanothus integerrimus var. puberulus F. W. Peirson 1933-7-9 10699 Kern Greenhorn Mountains near the summit camp. 2073 Comment
  HSC2963  Allium fimbriatum var. fimbriatum F. W. Peirson, Mabel Peirson 1926-4-3 6618 Lake S face of hill 3.3 mi. N of Middletown Comment
  POM89889  Erythronium californicum Frank W. Peirson 1926-4-2 6574 Lake Grade down to Clear Lake, Hopland Road. Comment
  RSA65554  Minuartia californica Mabel Peirson 1926-4-3 6612 Lake 3.3 miles north of Middletown. Comment
  RSA70893  Arctostaphylos glandulosa subsp. glandulosa Mabel Peirson, F. W. Peirson 1926-4-2 6572 Lake Summit of Hopland Grade. Comment
  RSA0012437  Senecio aronicoides F. W. Peirson, Mabel Peirson 1926-4-2 6597 Lake 5 miles east of Kelseyville on the road to the Lower Lake Comment
  RSA70331  Asclepias cordifolia F. W. Peirson, Mabel Peirson 1926-4-2 6595 Lake 5 miles east of Kelseyville on the road to the Lower Lake Comment
  RSA70374  Calochortus tolmiei Frank W. Peirson, Mabel B. Peirson 1926-4-3 6621 Lake South of Middletown near Napa County line Comment
  RSA73083  Linanthus dichotomus subsp. dichotomus F. W. Peirson, Mabel Peirson 1926-4-3 6614 Lake 3.4 miles north of Middletown Comment
  RSA80298  Orthocarpus erianthus F. W. Peirson, Mabel B. Peirson 1926-4-2 6604 Lake Lower Lake. Comment
  RSA91990  Pleuropogon californicus var. davyi F. W. Peirson, Mabel Peirson 1926-4-2 6592 Lake 3 miles east of Kelseyville on road to Lower Lake Comment
  RSA92619  Salix lasiolepis F. W. Peirson 1926-4-2 9603 Lake Hopland Grade to Clear Lake. Comment
  RSA75519  Phacelia adenophora F. W. Peirson 1926-6-24 6851 Lassen On Madeline Plain. Comment
  SD87577  Tetradymia glabrata Frank W. Peirson 1926-6-24 6854 Lassen Madeline Plains. Comment
  POM98581  Agrostis scabra F. W. Peirson 1926-6-22 6808 Lassen margin of Boiling Lake, Mt. Lassen National Park Comment
Read comments
Apr 23 2013
  RSA0070618  Cirsium douglasii var. breweri F. W. Peirson 1926-6-22 6824 Lassen Near Hot Springs, Drakesbad, Mount Lassen National Park. 1677 Comment
  RSA69483  Luzula comosa F. W. Peirson 1926-6-22 6826 Lassen Drakesbad, trail to Devils Kitchen, Lassen National Park. Comment
  CAS-BOT-BC123033  Lessingia lemmonii var. peirsonii Frank Warrington Peirson 1923-6-9 3550 Los Angeles Liebre Mts., at lowest point between the divides of Pine and Oak Grove Canyons 1173 Comment
  CAS-BOT-BC204749  Acmispon argophyllus var. argenteus Frank W. Peirson 1923-4-9 3468 Los Angeles 2 miles S.-E. of Wilsons [Wilson] Cove, San Clemente Comment
  CAS-BOT-BC205151  Lupinus elatus F. W. Peirson; Bulletin Torrey Club 1921-6-16 2438 Los Angeles Waterman Ridge Comment
  CAS-BOT-BC238991  Symphoricarpos rotundifolius Frank W. Peirson 1922-7-6 s.n. Los Angeles San Gabriel Mts., Blue Ridge Comment
  CAS-BOT-BC248474  Eriogonum angulosum Frank W. Peirson 1921-11-11 4202 Los Angeles Elizabeth Lake Comment
  CAS-BOT-BC268163  Eriogonum umbellatum var. minus Frank W. Peirson 1929-7-1 8446 Los Angeles Mt. Pacifico, San Gabriel Mts. 1981 Comment
  CAS-BOT-BC268210  Eriogonum umbellatum var. munzii Frank W. Peirson 1922-7-5 4684 Los Angeles Peak north of Big Pines Camp, San Gabriel Mountains 2209 Comment
  CAS-BOT-BC293120  Ericameria pinifolia Frank W. Peirson 1918-10-20 s.n. Los Angeles Rubio Wash at New York Ave., Altadena Comment
  CAS-BOT-BC310101  Hemizonella minima Frank W. Peirson 1920-6-10 238 Los Angeles San Gabriel Mts. Summit Mt. Wilson Comment
  CAS-BOT-BC310840  Heterotheca sessiliflora subsp. fastigiata Frank W. Peirson 1921-10-9 4735 Los Angeles San Gabriel Mts. Delta Canon [Canyon], Tujunga Trib'y Comment
  CAS-BOT-BC326712  Pleiacanthus spinosus Frank W. Peirson 1923-8-30 4742 Los Angeles North of Big Pines, San Gabriel Mts. 2225 Comment
  CAS-BOT-BC356543  Pseudognaphalium biolettii Frank W. Peirson 1923-4-12 3465 Los Angeles Wilsons Cove. San Clemente Is. Comment
  CAS-BOT-BC384174  Forestiera pubescens subsp. parvifolia Frank W. Peirson 1919-6-13 483 Los Angeles San Gabriel Mts. Rock Cr. Comment
  CAS-BOT-BC402006  Gilia ochroleuca subsp. bizonata Frank W. Peirson 1919-5-10 268 Los Angeles Arraster [Arrastre] Creek, San Gabriel Mts. 914 Comment
  CAS-BOT-BC402080  Gilia ochroleuca subsp. vivida F. W. Peirson 1923-5-26 3534 Los Angeles Rock Creek Divide, San Gabriel Mountains Comment
  CAS-BOT-BC53324  Frangula californica subsp. cuspidata Frank W. Peirson 1921-5-20 4442 Los Angeles Little Rock Creek, San Gabriel Mts. 975 Comment
  JEPS10828  Orobanche fasciculata Frank W. Peirson 1919-6-7 465 Los Angeles San Gabriel Mountains, Cow Canyon Divide. Comment
  JEPS11385  Penstemon speciosus Frank W. Peirson 1922-7-5 3193 Los Angeles Big Pines San Gabriel Mountains, Big Pines 2072 Comment
  JEPS14151  Oreonana vestita Frank W. Peirson 1918-6-17 137 Los Angeles summit of North Baldy San Gabriel Mts.; , N. Baldy 2743 Comment
  JEPS1713  Eucrypta chrysanthemifolia var. chrysanthemifolia Frank W. Peirson 1918-6-10 167 Los Angeles foothills e Rubio Canyon; San Gabriel Mountains 609 Comment
  JEPS18566  Brickellia microphylla var. microphylla Frank W. Peirson 1921-10-22 2599 Los Angeles head of Eaton Canyon, San Gabriel Mountains, just under the precipitous wall of rock that rises the the San Gabriel Peak San Gabriel Moutains, Eaton Canyon 1645 Comment
  JEPS18578  Brickellia californica Frank W. Peirson 1918-10-21 221 a Los Angeles West Fork San Gabriel River San Gabriel Mountains, West Fork San Gabriel River 1066 Comment
  JEPS19140  Ericameria pinifolia Frank W. Peirson 1918-8-17 223 Los Angeles San Antonio Canyon San Gabriel Mountains, San Antonio Canyon 1371 Comment
  JEPS19264  Ericameria cooperi var. cooperi F. W. Peirson 1919-5-10 411 Los Angeles Arrastre Canyon, n side of San Gabriel Mts. San Gabriel Mts. 838 Comment
  JEPS19277  Pycnanthemum californicum F. W. Peirson 1918-6-18 184 Los Angeles s Valyermo (vicinity of Devils Punch Bowl, watershed of Big Rock Creek, San Gabriel Mountains); San Gabriel Mts, Big Rock Creek watershed, Devils Punch Bowl 1219 Comment
  JEPS20558  Lessingia glandulifera var. glandulifera Frank W. Peirson 1918-10-26 294 Los Angeles San Gabriel Mountains, Big Dalton Canyon 609 Comment
  JEPS22260  Symphyotrichum greatae Frank W. Peirson 1918-10-16 274 Los Angeles Pacoima Canon San Gabriel Mountains 518 Comment
  JEPS26402  Malacothamnus marrubioides F. W. Peirson 1921-7-1 774 Los Angeles Arraster Creek, San Gabriel Mts., Los Angeles Co. Comment
  JEPS31619  Calystegia occidentalis subsp. fulcrata Frank W. Peirson 1919-6-14 497 Los Angeles Rock Creek , Rock Creek (San Gabriel Mountains) 1905 Comment
  JEPS32410  Solidago confinis Frank W. Peirson 1920-9-12 1230 Los Angeles Bear Flat Baldy Trail, San Grabriel Mts. 1676 Comment
  JEPS33729  Camissonia campestris Frank W. Peirson 1921-5-20 793 Los Angeles Little Rock Creek San Gabriel Mountains 1066 Comment
  JEPS34174  Chaenactis glabriuscula var. glabriuscula F. W. Peirson 1921-5-19 1399 Los Angeles Little Rock Creek San Gabriel Mts., Little Rock Creek 975 Comment
  JEPS35470  Helianthus gracilentus F. W. Peirson 1919-7-3 512 Los Angeles Lukens Peak (formerly called Sister Elsie Peak) San Gabriel Mountains (along dry ridges) 1219 Comment
  JEPS36271  Agoseris grandiflora var. grandiflora F. W. Peirson 1919-6-5 458 Los Angeles San Antonio canyon San Gabriel Mts., San Antonio canyon 1341 Comment
  JEPS36926  Artemisia ludoviciana subsp. incompta F. W. Peirson 1922-7-7 3197 Los Angeles Rangers Cabin San Gabriel Mts., Swartout Valley 1798 Comment
  JEPS37243  Packera ionophylla F. W. Peirson 1921-7-17 2511 Los Angeles Prairie Fork San Gabriel Mts., San Gabriel Mts. 2133 Comment
  JEPS37778  Quercus wislizeni Frank W. Peirson 1919-5-10 403 Los Angeles Mt. Gleason San Gabriel Mts. Comment
Read comments
Aug 21 2014
  JEPS39094  Verbena lasiostachys var. lasiostachys Frank W. Peirson 1918-7-9 175 Los Angeles San Antonio Canyon; San Gabriel Mts 1981 Comment
  JEPS40303  Platanus racemosa Frank W. Peirson 1919-3-27 341 Los Angeles Arroyo Seco Canyon San Gabriel Mountains 411 Comment
  JEPS41225  Mentzelia congesta Frank W. Peirson 1923-5-25 3523 Los Angeles San Gabriel Mountains, Rock Creek Comment
  JEPS41458  Erigeron breweri var. jacinteus F. W. Peirson 1922-7-21 3204 Los Angeles Little Baldy San Gabriel Mountains (summit) 2910 Comment
Read comments
Dec 10 2014
  JEPS41667  Heuchera caespitosa Frank W. Peirson 1918-6-10 67 Los Angeles n of Pasadena (n slope of Mt. Lowe near the summit); San Gabriel Mountains, Mt. Lowe 1676 Comment
  JEPS42336  Ceanothus spinosus Frank W. Peirson 1921-2-26 733 Los Angeles Topanga Canyon SW Los Angeles Co., Santa Monica Mountains 457 Comment
  JEPS43697  Clarkia bottae Frank W. Peirson 1919-5-18 432 Los Angeles Monrovia Canyon San Gabriel Mountains 304 Comment
  JEPS44012  Epilobium canum subsp. canum Frank W. Peirson 1918-10-15 279 Los Angeles foot of Echo Mt. trail San Gabriel Mts. 548 Comment
  JEPS44248  Drymocallis cuneifolia var. ewanii Frank W. Peirson 1921-6-18 493 a Los Angeles n slope of Windy Camp San Gabriel Mts., Mt. Islip (Mt. Islip) 2255 Comment
  JEPS44522  Horkelia rydbergii Frank W. Peirson 1923-8-31 4026 Los Angeles San Gabriel Mountains, Big Pines 1859 Comment
  JEPS44773  Rubus parviflorus F. W. Peirson 1921-6-17 1958 Los Angeles on Chilao-Islip Trail at crossing Little Rock (San Gabriel Mts.); , crossing of Little Rock 1981 Comment
  JEPS45027  Heteromeles arbutifolia Frank W. Peirson 1918-7 77 Los Angeles Santa Anita Canyon; San Gabriel Mts. 792 Comment
  JEPS45766  Elatine brachysperma Frank W. Peirson 1921-6-19 2470 Los Angeles Crystal Lake San Gabriel Mtns Comment
  JEPS45921  Carex subfusca Frank W. Peirson 1922-7-5 4265 Los Angeles Big Pines San Gabriel Mts., Big Pines 2072 Comment
  JEPS46376  Centaurium venustum Frank W. Peirson 1918-6-28 144 Los Angeles Lower Rubio Canyon San Gabriel Mts. 579 Comment
  JEPS49215  Ribes californicum var. hesperium Frank W. Peirson 1919-1-5 300 Los Angeles Monrovia Sawpit Canyon 457 Comment
  JEPS49281  Ribes amarum Frank W. Peirson 1919-4-5 316 Los Angeles Toll Road San Gabriel Range 1066 Comment
Read comments
Dec 10 2014
  JEPS49664  Boykinia rotundifolia Frank W. Peirson 1918-7-13 74 Los Angeles Santa Anita Canyon 975 Comment
  JEPS49954  Asclepias fascicularis Frank W. Peirson 1918-8-18 149 Los Angeles San Antonio Canyon; San Gabriel Mts. 1341 Comment
  JEPS50003  Crassula connata var. erectoides Frank W. Peirson 1920-4-26 2112 Los Angeles Santa Anita Wash San Gabriel Mts., Santa Anita Wash 213 Comment
  JEPS50471  Viola pedunculata Frank W. Peirson 1919-3-27 332 Los Angeles foot of Lukens Peak Trail; San Gabriel Mountains, Lukens Peak Trail 579 Comment
  JEPS50882  Silene verecunda subsp. platyota Frank W. Peirson 1919-6-14 474 Los Angeles Rock Creek San Gabriel Mountains, Rock Creek 1706 Comment
  JEPS51094  Stellaria nitens Frank W. Peirson 1918-5-26 43 Los Angeles Henninger Flats 868 Comment
  JEPS51887  Chamaesyce albomarginata Frank W. Peirson 1919-6-13 459 Los Angeles San Gabriel Mtns, Rock Creek Canyon 1295 Comment
  JEPS520  Allium monticola F. W. Peirson 1918-6-10 1 Los Angeles divide between Lowe and Markham 1630 Comment
Read comments
Oct 16 2006
  JEPS5280  Antirrhinum kelloggii F. W. Peirson 1918-6-4 189 Los Angeles just ne Altadena (foothills e of Rubio Canyon); Angeles National Forest 609 Comment
  JEPS53397  Cardamine californica var. integrifolia Frank W. Peirson 1918-10-16 265 Los Angeles Pacoima Canyon San Gabriel Mts., Pacoima Canyon (San Gabriel Mountains) 548 Comment
  JEPS55513  Lotus humistratus Frank W. Peirson 1919-5-11 406 Los Angeles Arraster Canyon San Gabriel Mountains 853 Comment
  JEPS56461  Eriogonum pusillum Frank W. Peirson 1923-8-31 4006 Los Angeles Blue Ridge San Gabriel Mountains, Blue Ridge Comment
  JEPS57950  Lastarriaea coriacea Frank W. Peirson 1919-5-21 447 Los Angeles San Gabriel Mountains, Arroyo Seco Arroyo Seco; San Gabriel Mountains, Arroyo Seco 381 Comment
  JEPS58395  Linanthus dichotomus Frank W. Peirson 1919-5-10 393 a Los Angeles Arraster Creek San Gabriel Mountains 914 Comment
  JEPS58687  Chrysolepis sempervirens Frank W. Peirson 1918-7-8 15 Los Angeles Baldy (= Mt. San Antonio); San Gabriel Mts. 2590 Comment
  JEPS60560  Clematis ligusticifolia Frank W. Peirson 1918-10-21 52 Los Angeles San Antonio Canyon 1341 Comment
  JEPS61208  Abronia pogonantha Frank W. Peirson 1921-5-19 2414 Los Angeles San Gabriel Mountains, Little Rock Creek 1036 Comment
  JEPS61408  Geranium carolinianum Frank W. Peirson 1919-5-18 437 Los Angeles Monrovia Canyon San Gabriel Mountains 457 Comment
  JEPS61715  Calochortus splendens Frank W. Peirson 1922-6-4 3089 Los Angeles Soledad Canyon San Gabriel Mountains 457 Comment
  JEPS64281  Sisyrinchium bellum Frank W. Peirson 1919-5-18 444 Los Angeles Monrovia Canyon; San Gabriel Mountains 518 Comment
  JEPS64999  Lupinus bicolor Frank W. Peirson 1919-5-10 413 Los Angeles Arraster Canyon San Gabriel Mts., Arraster Canyon 838 Comment
Read comments
Aug 21 2014
  JEPS65123  Lupinus elatus Frank W. Peirson 1918-6-10 89 Los Angeles Summit of San Gabriel Peak San Gabriel Peak Comment
  JEPS66275  Rhus trilobata Frank W. Peirson 1919-5-10 418 Los Angeles Arraster Creek; San Gabriel Mountains, Arraster Creek 914 Comment
Read comments
Aug 21 2014
  JEPS69138  Loeseliastrum matthewsii Frank W. Peirson 1919-6-15 468 Los Angeles Rock Creek Canyon San Gabriel Mts., Rock Creek Canyon 1249 Comment
  JEPS69358  Allophyllum divaricatum Frank W. Peirson 1918-10-26 293 Los Angeles Big Dalton Canyon San Gabriel Mts., Big Dalton Canyon 762 Comment
  JEPS7023  Galium grande F. W. Peirson 1919-5-18 448 Los Angeles ridge between Monrovia Canyon and Fish Canyon; San Gabriel Mts. 990 Comment
  JEPS7146  Plantago major Frank W. Peirson 1919-6-5 462 Los Angeles San Antonio Canyon San Gabriel Mountains 1341 Comment
  JEPS7558  Penstemon heterophyllus var. australis F. W. Peirson 1918-6-10 202 Los Angeles Mt. Lowe San Gabriel Mts., Mt. Lowe 762 Comment
  JEPS78507  Nemacladus longiflorus var. longiflorus Frank W. Peirson 1921-6-21 2453 Los Angeles San Gabriel Mountains, West Fork of San Gabriel River 640 Comment
  JEPS7998  Penstemon grinnellii var. scrophularioides F. W. Peirson 1918-6-10 201 Los Angeles Mt. Lowe San Gabriel Mts., Mt. Lowe 1524 Comment
  JEPS85719  Penstemon spectabilis var. subviscosus Frank W. Peirson 1924-6-16 Los Angeles near Pasadena (foothills of the San Gabriel Mountains); San Gabriel Mountains Comment
  JEPS8904  Chaenactis artemisiifolia Frank W. Peirson 1918-6-28 242 Los Angeles foothills e of Rubio Canyon; San Gabriel Mountains 609 Comment
  PASA1139  Monardella cinerea Frank W. Peirson 1920-9-12 Los Angeles San Antonio Peak 2819 Comment
  PASA1219  Cercocarpus betuloides Frank W. Peirson 1927-3-19 Los Angeles Seminole Hot Springs Region, Santa Monica Mts. Comment
  PASA1605  Meconella oregana var. denticulata Frank W. Peirson 1925-4-23 Los Angeles San Gabriel River 365 Comment
  PASA2105  Nama rothrockii Frank W. Peirson 1930-7-7 Los Angeles Arrastre Flat, San Bernardino Mts. 2285 Comment
  PASA2162  Brickellia californica Frank W. Peirson 1924-10-26 Los Angeles Arroyo Seco 198 Comment
  PASA2165  Brickellia nevinii Frank W. Peirson September, 1918 Los Angeles Near foot of Mt. Wilson Toll Road 396 Comment
  PASA2196  Chaenactis santolinoides Frank W. Peirson 1928-6-2 Los Angeles South Fork Rock Creek, San Gabriel Mts. 1981 Comment
  PASA2254  Ribes indecorum Frank W. Peirson 1920-12-30 Los Angeles San Gabriel Wash at Foothill Boulevard 137 Comment
  PASA2582  Thysanocarpus laciniatus Frank W. Peirson 1923-4-12 3446 Los Angeles Wilson's Cove, San Clemente Island Comment
  PASA911  Agoseris retrorsa Frank W. Peirson 1922-7-6 Los Angeles Blue Ridge, San Gabriel Mts. 2316 Comment
  POM193464  Rhus integrifolia F. W. Peirson 1925-2-22 240 Los Angeles Point Fermin Comment
  POM20553  Rosa woodsii subsp. gratissima F. W. Peirson 1922-7-5 s.n. Los Angeles Big Pines, Swartout [Swarthout] Valley, San Gabriel Mountains. Comment
  POM358609  Galinsoga parviflora var. parviflora F. W. Peirson 1931-4-11 9375 Los Angeles 1077 New York Avenue, Altadena. Comment
  POM46873  Brickellia nevinii F. W. Peirson 1924-12-5 5382 Los Angeles San Gabriel Peak at head of Eaton Canyon 1646 Comment
  RSA0121273  Eriastrum sapphirinum subsp. dasyanthum F. W. Peirson 1921-7-1 2829 Los Angeles Mint Canyon. 473 Comment
  RSA297993  Stachys albens F. W. Peirson 1918-8-16 179 Los Angeles San Antonio Canyon, San Gabriel Mts. 1341 Comment
  RSA523591  Plantago patagonica F. W. Peirson 1921-5-20 2410 Los Angeles Little Rock Creek 960 Comment
  RSA65063  Silene verecunda subsp. platyota F. W. Peirson 1919-6-14 474 Los Angeles Rock Creek, north slope of San Gabriel Mountains 1707 Comment
  RSA65149  Eriogonum fasciculatum var. foliolosum F. W. Peirson 1919-7-3 513 Los Angeles San Gabriel Mountains: Lukens Peak 915 Comment
  RSA65266  Chorizanthe staticoides F. W. Peirson 1918-6-15 26 Los Angeles Lower part of Mint Canyon, n.w. base of San Gabriel Mts. 457 Comment
  RSA65419  Cistanthe monosperma F. W. Peirson 1905-7-14 34 Los Angeles San Antonio Canyon, San Gabriel Mts., Los Angeles Co., California Comment
  RSA65491  Spergula arvensis F. W. Peirson 1869 Los Angeles Devil's Gate, Arroyo Seco Comment
  RSA65500  Arenaria macradenia var. arcuifolia F. W. Peirson 1929-7-1 8430 Los Angeles Aliso Creek at Tie Canyon. 1356 Comment
  RSA65560  Polycarpon tetraphyllum F. W. Peirson 1931-5-25 9376 Los Angeles At 1077 New York Ave. Altadena. Comment
  RSA65565  Spergularia platensis F. W. Peirson 1944-8-19 s.n. Los Angeles at 1085 New York Avenue, Altadena Comment
  RSA65596  Loeflingia squarrosa F. W. Peirson 1920-5-3 2123 Los Angeles Little Tujunga Wash, west end of San Gabriel Mts. 335 Comment
  RSA65994  Eriogonum umbellatum var. munzii F. W. Peirson 1923-8-30 4684 Los Angeles Le Montaine: north of Big Pines; norh side of San Gabriel Mountains 2287 Comment
  RSA66070  Barbarea orthoceras F. W. Peirson 1922-7-5 3166 Los Angeles Big Pines Meadow, north side of San Gabriel Mountains 2072 Comment
  RSA66841  Caulanthus heterophyllus var. heterophyllus F. W. Peirson 1918-6-6 63 Los Angeles East of Rubio Canyon Comment
  RSA67137  Galium trifidum F. W. Peirson 1908-5-22 2655 Los Angeles Bixby Ranch near Long Beach. Comment
  RSA67146  Galium grande F. W. Peirson 1919-5-18 448 Los Angeles Ridge between Monrovia and Fish Canyons 1067 Comment
  RSA68679  Zigadenus brevibracteatus Frank W. Peirson 1932-4-17 8957 Los Angeles Below Lovejoy Dam, Lovejoy Buttes, southwestern Mojave Desert. 762 Comment
  RSA68709  Lilium parryi Frank W. Peirson 1921-7-17 2515 Los Angeles Prairie Fork of San Gabriel River, San Gabriel Mountains. 2134 Comment
  RSA68964  Plantago patagonica F. W. Peirson 1920-5-3 1183 Los Angeles Little Tujunga Wash, west end of San Gabriel Mts. 335 Comment
  RSA69327  Veratrum californicum var. californicum Frank W. Peirson 1922-7-6 3190 Los Angeles Big Pines Meadow, Swartout Valley Region, San Gabriel Mountains. 2088 Comment
  RSA69492  Mirabilis laevis var. crassifolia F. W. Peirson 1918-6-16 5356 Los Angeles Top of first grade, Mint Canyon, near Saugus. Comment
  RSA69897  Fraxinus velutina F. W. Peirson 1922-6-3 3081 Los Angeles 3 miles west of Elizabeth Lake. 1113 Comment
  RSA69980  Abronia pogonantha F. W. Peirson 1921-5-19 2414 Los Angeles Little Rock Creek: north base of San Gabriel Mountains. 1037 Comment
  RSA70178  Allium fimbriatum var. fimbriatum F. W. Peirson 1919-5-10 425 Los Angeles Arrastre, San Gabriel Mountains 854 Comment
  RSA70286  Juncus mexicanus F. W. Peirson 1921-5-20 5352 Los Angeles Little Rock Creek, N slope of San Gabriel Mts 1037 Comment
  RSA70358  Cycladenia humilis var. venusta F. W. Peirson 1905-7-14 4470 Los Angeles Baldy and North Baldy Comment
Read comments
Nov 30 2015
  RSA70453  Allium burlewii F. W. Peirson 1921-6-16 2842 Los Angeles north slope of Mt. Waterman 2133 Comment
  RSA70455  Allium burlewii F. W. Peirson 1918-6-17 4 Los Angeles Summit of North Baldy, San Gabriel Mts. 2820 Comment
  RSA71100  Calystegia macrostegia subsp. intermedia F. W. Peirson 892 Los Angeles Santa Monica Canyon, Santa Monica Mts. Comment
  RSA71890  Saltugilia splendens subsp. splendens F. W. Peirson 1918-10-16 s.n. Los Angeles Pacoima Canyon, west end of San Gabriel Mts. 534 Comment
  RSA72097  Epilobium canum subsp. latifolium F. W. Peirson 1920-9-12 2292 Los Angeles South trail to Mt. San Antonio, San Gabriel Mts. 2683 Comment
  RSA72291  Gilia angelensis F. W. Peirson 1919-5-14 424 Los Angeles Eaton Canyon. 685 Comment
  RSA72316  Gilia brecciarum subsp. brecciarum F. W. Peirson 1921-5-20 4704 Los Angeles Little Rock Creek, N slope of San Gabriel Mts 1037 Comment
  RSA72336  Epilobium canum subsp. canum F. W. Peirson 1918-10-26 6479 Los Angeles Big Dalton Canyon, San Gabriel Mtns. 640 Comment
  RSA73320  Clarkia cylindrica subsp. cylindrica F. W. Peirson 1921-5-18 2797 Los Angeles summit of Newhall Grade, near Newhall. 427 Comment
  RSA73342  Clarkia dudleyana F. W. Peirson 1919-6-7 466 Los Angeles Cow Canyon divide, San Antonio Creek Region 1372 Comment
  RSA73343  Clarkia xantiana subsp. parviflora F. W. Peirson 1924-5-27 4623 Los Angeles Trail below Colby's 854 Comment
  RSA73345  Clarkia xantiana F. W. Peirson 1928-6-2 7943 Los Angeles Trail up South Fork of Rock Creek. 1677 Comment
  RSA74780  Phacelia ramosissima var. latifolia F. W. Peirson 1929-6-30 8424 Los Angeles Aliso Creek at Tie Canyon. 1357 Comment
  RSA74921  Phacelia egena F. W. Peirson 1930-5-30 8903 Los Angeles North slope of Rock Creek 1372 Comment
  RSA74924  Phacelia egena F. W. Peirson 1929-6-30 8426 Los Angeles Just below the old mill on the Tie Canyon stream, Aliso Creek, San Gabriel Mountians. 1341 Comment
  RSA75683  Camissonia boothii subsp. decorticans F. W. Peirson 1919-6-14 479 Los Angeles Rock Creek [Big?] 1524 Comment
  RSA75690  Camissonia campestris subsp. campestris F. W. Peirson 1917-5-13 4515 Los Angeles Near Little Rock, Mojave Desert. Comment
  RSA75884  Nemophila menziesii var. integrifolia F. W. Peirson 1925-3-18 5467 Los Angeles South slope of Newhall Grade between Saugus and San Fernando Valley 381 Comment
  RSA77144  Ceanothus crassifolius F. W. Peirson 1921-5-12 4444 Los Angeles Santa Anita Canyon, just below Forks in trail; San Gabriel Mountains. Comment
Read comments
Sep 30 2014
  RSA77170  Rhus integrifolia F. W. Peirson 1919-2-9 224 Los Angeles Fish Canyon, San Gabriel Mts. 305 Comment
Read comments
Dec 10 2014
  RSA77172  Rhus integrifolia F. W. Peirson 1925-2-22 240 Los Angeles Point Fermin Comment
  RSA77173  Rhus integrifolia F. W. Peirson 1926-4-26 6646 Los Angeles Pocoima Wash, San Fernando Valley. Comment
  RSA77353  Ceanothus greggii var. vestitus F. W. Peirson 1918-6-16 4448 Los Angeles Rock Creek, north slope of San Gabriel Mountains 1448 Comment
  RSA77489  Ceanothus spinosus F. W. Peirson 1906-7-10 4445 Los Angeles Rustic Canyon, Santa Monica Mtns. Comment
  RSA77637  Marah macrocarpa F. W. Peirson 1921-2-26 4507 Los Angeles Topango Canyon Divide. 488 Comment
  RSA79452  Scrophularia villosa F. W. Peirson 1907-7-1 s.n. Los Angeles Catalina Island. Comment
  RSA79455  Scrophularia californica F. W. Peirson 1911-04 191 Los Angeles Laurel Canyon. Comment
  RSA79595  Cryptantha circumscissa F. W. Peirson 1908-6-3 174 Los Angeles summit of Mt. Wilson Comment
  RSA80384  Solanum umbelliferum F. W. Peirson 1919-6-15 1082 Los Angeles Rock Creek, north slope of San Gabriel Mountains. 1296 Comment
  RSA80391  Solanum umbelliferum F. W. Peirson 1918-6-16 186 Los Angeles Rock Creek, north slope of San Gabriel Mountains 1448 Comment
  RSA80755  Cryptantha pterocarya F. W. Peirson 1919-6-4 477 Los Angeles Rock Creek, north slope of San Gabriel Mts. 1692 Comment
  RSA81469  Castilleja applegatei subsp. martinii F. W. Peirson 1918-5-19 209 Los Angeles Millard's Canyon, south base of San Gabriel Mts. Comment
  RSA82243  Castilleja miniata subsp. miniata F. W. Peirson 1921-7-17 2726 Los Angeles Prairie Fork of San Gabriel River, San Gabriel Mountains. 2134 Comment
  RSA82258  Castilleja affinis subsp. affinis F. W. Peirson 1926-4-26 6648 Los Angeles At summit of Mint Canyon Grade east of Saugus. Comment
  RSA82396  Salvia spathacea F. W. Peirson 1920-5-8 1054 Los Angeles San Raphael Hills. 457 Comment
  RSA83379  Monardella exilis F. W. Peirson 1918-6-18 1067 Los Angeles Between Rock Creek and Cajon Pass, east of Llano. Comment
  RSA84495  Ribes malvaceum F. W. Peirson 1927-3-19 7114 Los Angeles 1 mile or so back on thr range. Seminole Hot Springs, Santa Monica Mts. Comment
  RSA84504  Ribes indecorum F. W. Peirson 1920-12-30 2341 Los Angeles San Gabriel River Wash at Foothill Blvd, West of Azusa. 137 Comment
  RSA84848  Ribes cereum var. cereum F. W. Peirson 1922-7-6 4433 Los Angeles Big Pines 2104 Comment
  RSA84995  Asplenium vespertinum F. W. Peirson 1921-6-21 2840 Los Angeles West Fork of San Gabriel River. 610 Comment
  RSA85031  Polystichum scopulinum F. W. Peirson 1921-6-17 2464 Los Angeles canyon on divide between Little Rock Creek tributary and Bear Creek, San Gabriel Mts. 1920 Comment
  RSA85522  Ribes amarum F. W. Peirson 1928-2-19 7686 Los Angeles Arroyo Seco 610 Comment
  RSA85525  Umbellularia californica F. W. Peirson 1919-1-25 312 Los Angeles Arroyo Seco, near Pasadena 381 Comment
  RSA85558  Juniperus californica F. W. Peirson 1919-5-11 427 Los Angeles Arraster Creek, north slope of San Gabriel Mts. 853 Comment
  RSA85608  Ivesia santolinoides F. W. Peirson 1921-6-16 s.n. Los Angeles Summit of Mt. Waterman Ridge 2287 Comment
  RSA86654  Purshia tridentata var. glandulosa F. W. Peirson 1923-5-26 3531 Los Angeles Rock Creek, north slope of San Gabriel Mts. 1448 Comment
  RSA86696  Vulpia octoflora var. octoflora F. W. Peirson 1920-5-3 2124 Los Angeles Little Tujunga Wash, west end of San Gabriel Mts. 335 Comment
  RSA86715  Andropogon glomeratus var. scabriglumis F. W. Peirson 1926-3-20 6517 Los Angeles Arroyo Seco, near Altadena. Alt. 2500 ft. 762 Comment
  RSA86724  Aristida ternipes var. hamulosa F. W. Peirson 1919-11-17 1590 Los Angeles in dense tufts, trail to Mt. Lowe, west of Eaton Canyon 609 Comment
  RSA86772  Vulpia myuros var. hirsuta F. W. Peirson 1923-4-10 3418 Los Angeles San Clemente Island. Summit of Plateau. Comment
  RSA86773  Vulpia myuros var. hirsuta F. W. Peirson 1918-04 1566 Los Angeles New York Drive, Altadena Comment
  RSA86853  Prunus emarginata F. W. Peirson 1941-6-24 s.n. Los Angeles Summit of ridge above Big Pines, north side of San Gabriel Mountains, near Los Angeles-San Bernardino County line. Comment
  RSA87060  Hordeum murinum subsp. glaucum F. W. Peirson 1918-04 1605 Los Angeles New York Drive, Altadena Comment
  RSA87063  Hordeum brachyantherum F. W. Peirson 1918-4-28 1606 Los Angeles Road east and south of El Monte. Comment
  RSA87166  Quercus durata var. gabrielensis F. W. Peirson 1919-5-14 1710 Los Angeles Eaton Canyon. 686 Comment
Read comments
Dec 19 2014
  RSA87192  Lupinus excubitus var. johnstonii F. W. Peirson 1929-7-1 8442 Los Angeles Mt. Pacifico 1982 Comment
  RSA87337  Melica imperfecta F. W. Peirson 1922-5-30 5365 Los Angeles Dawn Station, Mt. Lowe, San Gabriel Mountains. Comment
  RSA88757  Carex praegracilis F. W. Peirson 1918-4-28 1624 Los Angeles Southeast of El Monte. Comment
  RSA90181  Astragalus bicristatus F. W. Peirson 1921-7-17 2510 Los Angeles Prairie Fork of San Gabriel River, San Gabriel Mountains 2058 Comment
  RSA91501  Trifolium ciliolatum F. W. Peirson 1923-5-21 3517 Los Angeles Fish Canyon 914 Comment
  RSA94159  Hulsea heterochroma F. W. Peirson 1919-7-3 514 Los Angeles San Gabriel Mts: on Lukens Peak trail. 1220 Comment
  RSA94704  Packera ionophylla F. W. Peirson 1921-7-17 2511 Los Angeles Prairie Fork of San Gabriel River. 2134 Comment
  SBBG28525  Frangula californica subsp. cuspidata F. W. Peirson 1919-6-15 727 Los Angeles Rock Crk, N slope 1295 Comment
  SBBG29808  Phacelia cryptantha F. W. Peirson 1928-6-2 7942 Los Angeles trail up S Fk of Rock Crk 1676 Comment
  SD58173  Pholistoma auritum var. auritum Frank W. Peirson 1919-5-18 441 Los Angeles Monrovia Canyon. 381 Comment
  SD70418  Dudleya cymosa subsp. pumila Frank W. Peirson 1918-7-7 262 Los Angeles Ontario Ridge, San Gabriel Mountains. 2590 Comment
  SD87549  Leptosiphon breviculus Frank W. Peirson 1929-7-1 8443 Los Angeles Mt. Pacifico, San Gabriel Mountains. 1981 Comment
  SD87762  Lemmonia californica F. W. Peirson 1921-6-14 2421 Los Angeles Tujunga Comment
Read comments
Mar 26 2016
  UC1076517  Heterotheca sessiliflora subsp. fastigiata Frank W. Peirson 1922-9-26 Los Angeles at California Street Bridge Arroyo Seco Comment
  UC501470  Clarkia heterandra Frank W. Peirson 1923-6-9 3551 Los Angeles Liebre Mts., Pine Canyon 1188 Comment
  UC635067  Dodecahema leptoceras Frank W. Peirson 1925-4-19 5776 Los Angeles e of Pacoima bridge (on upper boulevard) Comment
  UC908542  Eriastrum pluriflorum Frank W. Peirson 1927-5-7 7268 Los Angeles 12 mi s Muroc Comment
  UC909133  Loeseliastrum matthewsii Frank W. Peirson 1921-5-19 952 Los Angeles Little Rock Creek 1036 Comment
  UCD45456  Quercus chrysolepis F. W. Peirson 1918-5-19 16 Los Angeles Echo Mountain, 3400 ft. San Gabriel Range. 1036 Comment
  UCD90369  Poa annua F. W. Peirson 1923-4-12 3420 Los Angeles Big Pines Meadow, San Gabriel. 2087 Comment
  CAS-BOT-BC12818  Lepidium perfoliatum Frank W. Peirson 1933-5-13 10666 Los Angeles 12 miles northeast of Lancaster. Comment
  CAS-BOT-BC241574  Eriogonum baileyi var. baileyi Frank W. Peirson 1921-11-11 2718 Los Angeles Elizabeth Lake. On east shore of lake near the road to Antelope Valley Comment
  CAS-BOT-BC241585  Eriogonum baileyi var. baileyi Frank W. Peirson 1928-9-4 8188 Los Angeles Rock Cr. 1 mile below Pallett Cr., Mohave [Mojave] Desert Comment
  CAS-BOT-BC339275  Lessingia glandulifera var. glandulifera F. W. Peirson 1921-7-19 1260 Los Angeles Camp at Coldwater & Cattle Canons [Canyons], San Gabriel Mts. 792 Comment
  CAS-BOT-BC388657  Minuartia douglasii Frank W. Peirson 1922-6-4 3075 Los Angeles Soledad Pass, north of Vincent 944 Comment
  CAS-BOT-BC514944  Eriastrum sapphirinum subsp. brevibracteatum F. W. Peirson 1921-7-1 922 Los Angeles Arraster Creek, San Gabriel Mts. 944 Comment
  CAS-BOT-BC60047  Lepidium virginicum var. menziesii Frank W. Peirson 1921-3-3 2357 Los Angeles San Gabriel Mountains. Hills of the Arroyo Seco. 426 Comment
  CAS-BOT-BC64024  Anisocoma acaulis Frank W. Peirson 1924-5-14 4608 Los Angeles Near Summit Cajon Pass Comment
  CAS-BOT-BC67710  Pellaea andromedifolia Frank W. Peirson 1919-12-2 1513 Los Angeles San Gabriel Mts. - West Fork Rubio 685 Comment
  JEPS11680  Orobanche parishii Frank W. Peirson 1919-5-10 416 Los Angeles San Gabriel Mts., Arraster Canyon, Arraster Creek 914 Comment
  JEPS14823  Sisymbrium irio Frank W. Peirson 1923-3-23 3355 Los Angeles streets of Claremont Claremont Comment
  JEPS1552  Phacelia brachyloba Frank W. Peirson 1918-6-30 160 Los Angeles Toll Road to Mount Wilson; San Gabriel Mountains 1143 Comment
  JEPS16003  Angelica tomentosa Frank W. Peirson 1921-7-19 2508 Los Angeles San Gabriel Mountains, San Gabriel River, Cow Canyon Cow Canyon; San Gabriel Mountains, San Gabriel River, Cow Canyon 914 Comment
  JEPS47134  Cuscuta subinclusa Frank W. Peirson 1918-8-6 261 Los Angeles old trail to Mt. Wilson 609 Comment
  JEPS48061  Sedum spathulifolium Frank W. Peirson 1921-6-21 2472 Los Angeles West Fork San Gabriel Riv. , West Fork San Gabriel Riv (San Gabriel Mountains) 685 Comment
  JEPS53236  Athysanus pusillus Frank W. Peirson 1919-4-5 60 a Los Angeles Sierra Madre Trail to Mount Wilson; San Gabriel Mountains 762 Comment
  JEPS61500  Allium campanulatum Frank W. Peirson 1922-7-5 3192 Los Angeles about 1/2 mi w Big Pines (along left bank of stream); San Gabriel Mountains, Mescal Creek Comment
  JEPS61593  Chlorogalum pomeridianum var. pomeridianum Frank W. Peirson 1918-6-28 10 Los Angeles Lower Rubio Canyon 579 Comment
  JEPS68644  Malva nicaeensis F. W. Peirson 3356 Los Angeles streets of Claremont Claremont Comment
  JEPS7520  Madia gracilis Frank W. Peirson 1919-6-5 508 Los Angeles San Antonio Canyon, very close to boundary of San Bernardino County Angeles National Forest, San Gabriel Mts. Comment
  JEPS9855  Limosella acaulis Frank W. Peirson 1922-7-5 3155 Los Angeles Small Lake 2 mi w Big Pines (<lake is one of the sources of Mescal Cr. and lies in the westward extension of the Lone Pine-Swartout Valley depression. F. W. Peirson>); San Gabriel Mountains 1859 Comment
  PASA1495  Eriogonum thurberi Frank W. Peirson 1930-5-30 Los Angeles Mint Canyon 609 Comment
  PASA1801  Aster canescens Frank W. Peirson 1923-8-30 Los Angeles North of Big Pines Auto Camp 1310 Comment
  PASA1828  Osmorhiza brachypoda Frank W. Peirson 1919-5-21 Los Angeles Arrroyo Seco Canyon 609 Comment
  PASA1929  Conium maculatum Frank W. Peirson 1920-4-25 Los Angeles Verdugo Canyon 274 Comment
  PASA2311  Lagophylla ramosissima Frank W. Peirson 1922-7-29 Los Angeles Grade east of Bailey's Ranch, Ridge Route 1066 Comment
  PASA2331  Madia exigua Frank W. Peirson 1923-5-21 Los Angeles Fish Canyon, San Gabriel Mts. 914 Comment
  PASA615  Eleocharis parishii Frank W. Peirson 1930-5-31 Los Angeles Lovejoy Buttes, Mohave Desert Comment
  POM13525  Centrostegia thurberi F. W. Peirson 1922-7-7 3172 Los Angeles Sheep Creek. North base of San Gabriel Mountains. 1448 Comment
  POM96042  Allium fimbriatum var. fimbriatum F. W. Peirson 1926-4-26 6661 Los Angeles 5 miles west of Rock Creek, Mohave Desert. Comment
  POM9792  Polystichum scopulinum F. W. Peirson 1921-6-17 2464 Los Angeles canyon on divide between Little Rock Creek tributary and Bear Creek, San Gabriel Mts. 1920 Comment
  POM9926  Sphaeralcea emoryi subsp. variabilis F. W. Peirson 1921-5-18 s.n. Los Angeles Palmdale, Antelope Valley. Comment
  RSA0001998  Radicula sinuata var. truncata F. W. Peirson 1921-6-19 2450 Los Angeles Crystal Lake, San Gabriel Mts. 1677 Comment
  RSA0005769  Potentilla peirsonii F. W. Peirson 1919-6-16 493 Los Angeles S Fork of Rock Creek, San Gabriel Mts. 1982 Comment
  RSA0005776  Galium siccatum var. anotinum F. W. Peirson 1918-8-7 215 Los Angeles Mt. San Antonio ('Baldy'), San Gabriel Mts. 2134 Comment
  RSA0005777  Galium siccatum var. anotinum F. W. Peirson 1919-6-7 215 Los Angeles Cow Canyon Divide, San Gabriel Mts. 1372 Comment
  RSA0017034  Galium grande F. W. Peirson 1919-4-15 s.n. Los Angeles Sierra Madre Trail above the Madronas 915 Comment
  RSA0019985  Bromus tectorum F. W. Peirson 1922-7-5 5363 Los Angeles Big Pines Camp, north side of San Gabriel Mountains 2104 Comment
  RSA0030912  Galinsoga parviflora Frank W. Peirson 1931-4-11 9375 Los Angeles At 1077 New York Drive, Altadena. Comment
  RSA0062944  Heuchera elegans F. W. Peirson 1928-6-2 7935 Los Angeles Trail up south fork of Rock Creek, north face of San Gabriel Mts. 1905 Comment
  RSA0074530  Heterotheca fastigiata F. W. Peirson 1920-3-28 5273 Los Angeles Tujunga Canyon, Western San Gabriel Mountains. 427 Comment
  RSA0079461  Cryptantha muricata var. jonesii F. W. Peirson 1925-4-23 5794 Los Angeles Burned hillslope at forks of San Gabriel River. 533 Comment
  RSA0104651  Eriastrum densifolium subsp. austromontanum F. W. Peirson 1919-7-29 521 Los Angeles Summit of Mt. Wilson, San Gabriel Mountains 1738 Comment
  RSA0126321  Nemacladus longiflorus var. longiflorus F. W. Peirson 1921-6-21 2453 Los Angeles West Fork of San Gabriel River. 610 Comment
  RSA0128633  Arabis repanda var. repanda F. W. Peirson 1921-6-16 2498 Los Angeles North slope of Mt. Waterman, San Gabriel Mts. 1981 Comment
  RSA64575  Eriogonum saxatile F. W. Peirson 1929-7-1 8434 Los Angeles San Gabriel Mountains: Tie Canyon, Aliso Creek tributary; trail to Mt. Pacifico. 1433 Comment
  RSA64755  Chenopodium multifidum F. W. Peirson 1920-10-1 2291 Los Angeles Gasoline station back of Chamber of Commerce Building, Pasadena Comment
  RSA65346  Atriplex watsonii F. W. Peirson 1923-4-11 3462 Los Angeles In canyon below farm buildings at Eagle Ranch, San Clemente Island Comment
  RSA65369  Pterostegia drymarioides F. W. Peirson 1925-4-23 5790 Los Angeles Forks of San Gabriel River. 534 Comment
  RSA65734  Claytonia perfoliata subsp. intermontana F. W. Peirson 1923-5-26 3545 Los Angeles Trail northward from Rock Creek Divide, San Gabriel Mountains 2134 Comment
  RSA66024  Eriogonum gracile var. gracile F. W. Peirson 1921-7-19 1743 Los Angeles San Gabriel Mts: junction of Coldwater Canyon and Cattle Canyon 793 Comment
  RSA66033  Eriogonum gracile var. gracile F. W. Peirson 1928-9-4 8184 Los Angeles East of Palmdale. Comment
  RSA66068  Rorippa curvisiliqua F. W. Peirson 1906-7-16 s.n. Los Angeles Los Angeles River, San Fernando Valley Comment
  RSA66259  Dicentra chrysantha F. W. Peirson 1918-7-7 56 Los Angeles San Antonio Canyon Comment
  RSA66752  Caulanthus heterophyllus var. heterophyllus F. W. Peirson 1919-3-17 4186 Los Angeles Hills west of Arroyo Seco, Pasadena 426 Comment
  RSA68340  Lepidium lasiocarpum F. W. Peirson 1923-4-8 3448 Los Angeles Wilsons Cove, San Clemente Island. Comment
  RSA68691  Muilla maritima F. W. Peirson 1923-5-26 4100 Los Angeles Rock Creek, north slope of San Gabriel Mountains. 1601 Comment
  RSA69291  Chlorogalum pomeridianum var. pomeridianum Frank W. Peirson 1918-6-28 10 Los Angeles Rubio Canyon 610 Comment
  RSA69708  Mentzelia albicaulis F. W. Peirson 1932-4-17 9853 Los Angeles Below the Lovejoy Dam, Lovejoy Buttes, Mojave Desert. 762 Comment
  RSA69710  Mentzelia dispersa F. W. Peirson 1921-6-14 2466 Los Angeles Trail F of San Gabriel RiverSan Gabriel Mts. 976 Comment
  RSA69861  Juncus torreyi F. W. Peirson 1928-9-4 8186 Los Angeles about 1 mile above Pallett Creek Comment
  RSA70162  Dichelostemma capitatum subsp. capitatum F. W. Peirson 1923-4-12 3485 Los Angeles Wilson s Cove, San Clemente Island Comment
  RSA70196  Allium fimbriatum var. fimbriatum F. W. Peirson 1926-4-26 6661 Los Angeles 5 miles west of Rock Creek, Mohave Desert. Comment
  RSA70314  Juncus xiphioides F. W. Peirson 1924-8-23 5058 Los Angeles west fork of San Gabriel River 411 Comment
  RSA71829  Saltugilia splendens subsp. splendens F. W. Peirson 1925-4-23 5785 Los Angeles Forks of San Gabriel River. 534 Comment
  RSA71901  Gilia capitata subsp. abrotanifolia F. W. Peirson 1903-3-28 916 Los Angeles Benedict's Canyon, Santa Monica Mountains. Comment
  RSA71948  Collomia grandiflora F. W. Peirson 1924-4-28 4634 Los Angeles Hoyt Ranch, Tujunga Creek, W end of San Gabriel Mts. 579 Comment
  RSA72194  Oenothera californica subsp. californica F. W. Peirson 781 Los Angeles Los Angeles River, San Fernando Valley Comment
  RSA73006  Linanthus parryae F. W. Peirson 1917-5-13 945 Los Angeles West of Little Rock. Comment
  RSA73049  Leptosiphon parviflorus F. W. Peirson 1919-4-19 377 Los Angeles Pacoima Canyon, west end of San Gabriel Mts. 579 Comment
  RSA73314  Oenothera rosea F. W. Peirson 1934-4-14 11144 Los Angeles Jannoch Nurseries, northwestern part of Pasadena Comment
  RSA73331  Clarkia epilobioides F. W. Peirson 1921-4-21 47025 Los Angeles Trail to Sycamore Flat, San Gabriel Mountains. 530 Comment
  RSA73334  Clarkia epilobioides F. W. Peirson 1919-5-18 433 Los Angeles Hills east of Monrovia Canyon 457 Comment
  RSA73681  Leptosiphon aureus subsp. aureus F. W. Peirson 1919-3-30 343 Los Angeles Tujunga Canyon. West end of San Gabriel Mts. 427 Comment
  RSA74143  Phacelia distans F. W. Peirson 1923-5-21 3512 Los Angeles South face of San Gabriel Mountains. Fish Canyon. 793 Comment
  RSA74785  Phacelia ramosissima var. latifolia F. W. Peirson 1920-6-10 2159 Los Angeles foot of Echo Mt. trail San Gabriel Mts. 579 Comment
  RSA74792  Phacelia parryi F. W. Peirson 1918-5-4 976 Los Angeles Summit of Santa Monica Range, above Brents on the Malibu Comment
  RSA75344  Phacelia bicolor F. W. Peirson 1933-5-13 10664 Los Angeles About 10 miles south of Munroc, Western Mojave Desert. Comment
  RSA75507  Phacelia brachyloba F. W. Peirson 965 Los Angeles Las Flores Canyon; San Gabriel Mts. Comment
  RSA75867  Nemophila menziesii var. integrifolia F. W. Peirson 1920-5-1 166 Los Angeles Idle Hour Camp, Eaton Canyon. 732 Comment
  RSA77747  Viola pedunculata F. W. Peirson 1923-4-9 3443 Los Angeles San Clemente Island: about 6 miles SE of Wilson's Cove. Comment
  RSA80075  Mimulus floribundus F. W. Peirson 1916-06 1123 Los Angeles Arroyo Seco, near Pasadena Comment
  RSA80136  Mimulus guttatus F. W. Peirson 1903-4-2 1126 Los Angeles Ditch near Elysian Park, Los Angeles. Comment
  RSA80188  Antirrhinum coulterianum F. W. Peirson 1925-4-23 5788 Los Angeles Forks of San Gabriel River. 534 Comment
  RSA80446  Mimulus guttatus F. W. Peirson 1921-6-21 2461 Los Angeles West Fork of San Gabriel River 884 Comment
  RSA80832  Pedicularis densiflora F. W. Peirson 1921-4-21 2363 Los Angeles Sycamore Flat Ridge, San Gabriel Mtns. 854 Comment
  RSA80833  Pedicularis densiflora F. W. Peirson 1925-4-23 5798 Los Angeles Forks of San Gabriel River 530 Comment
  RSA81490  Castilleja linariifolia F. W. Peirson 1921-7-2 2478 Los Angeles Pallett Creek, north base of San Gabriel Mountains. 1098 Comment
  RSA82077  Orobanche fasciculata F. W. Peirson 1929-7-1 8436 Los Angeles One small colony on firebreak, Aliso Creek, San Gabriel Mtns. 1585 Comment
  RSA82223  Verbena lasiostachys var. lasiostachys F. W. Peirson 1919-7-1 175 Los Angeles Montovia Canyon, south base of San Gabriel Mountains. 381 Comment
  RSA82360  Scutellaria tuberosa F. W. Peirson 1925-4-23 5804 Los Angeles San Gabriel River 366 Comment
  RSA82526  Verbascum virgatum F. W. Peirson 1919-11-16 1097 Los Angeles East end of New York Ave., Altadena. Comment
  RSA84868  Ranunculus cymbalaria var. saximontanus F. W. Peirson 1951-1 s.n. Los Angeles Near Long Beach Comment
  RSA85011  Adiantum aleuticum F. W. Peirson 1919-12-28 1522 Los Angeles Eaton Canyon, south base of San Gabriel Mts. 1066 Comment
  RSA85045  Dryopteris arguta F. W. Peirson 1919-12-2 1506 Los Angeles West Fork of Rubio Canyon, south base of San Gabriel Mtns 762 Comment
  RSA86864  Prunus ilicifolia subsp. ilicifolia F. W. Peirson 1923-5-21 83 Los Angeles Fish Canyon 915 Comment
Read comments
Aug 20 2016
  RSA87439  Galium aparine F. W. Peirson 1923-4-8 3431 Los Angeles Wilson's Cove, San Clemente Island. Comment
  RSA90279  Lathyrus vestitus var. vestitus F. W. Peirson 1919-4-19 374 Los Angeles Pacoima Canyon, west end of San Gabriel Mountains. 671 Comment
  RSA90336  Lotus scoparius F. W. Peirson 1920-3-30 98 Los Angeles Brae-burn road, Altadena. Comment
  RSA90708  Astragalus trichopodus var. lonchus F. W. Peirson 1921-2-26 586 Los Angeles Foot of Topanga Canyon, Santa Monica Mtns. Comment
  RSA90850  Carex senta F. W. Peirson 1919-5-14 1625 Los Angeles W fork of Eaton Canyon 822 Comment
  RSA90985  Trifolium wormskioldii F. W. Peirson 1919-6-15 485 Los Angeles Rock Creek. San Gabriel Mtns. 1296 Comment
  RSA91107  Trifolium obtusiflorum F. W. Peirson 1919-7-1 485 Los Angeles Fish Canyon, San Gabriel Mts. 305 Comment
  RSA91119  Trifolium monanthum var. monanthum F. W. Peirson 1919-6-16 92 Los Angeles S Fork of Rock Creek, San Gabriel Mts. 1982 Comment
  RSA91156  Lessingia glandulifera var. glandulifera F. W. Peirson 1919-8-30 1261 Los Angeles Desert between Mojave and Lancaster. Comment
  RSA91504  Trifolium ciliolatum F. W. Peirson 1903-4-9 552 Los Angeles Shorb, Los Angeles County Comment
  RSA91553  Trifolium willdenovii F. W. Peirson 1919-5-14 423 Los Angeles Eaton Canyon 732 Comment
  RSA91603  Carex multicaulis F. W. Peirson 1924-5-27 4626 Los Angeles north slope of Strawberry Peak, San Bernardino Mts. 1524 Comment
  RSA91732  Nassella pulchra F. W. Peirson 1918-4-28 1587 Los Angeles Summit of Turnbull Canyon, hills above Whittier Comment
  RSA91741  Gnaphalium stramineum F. W. Peirson 1921-6-19 2583 Los Angeles Crystal Lake, North Fork San Gabriel River 1676 Comment
  RSA91761  Ericameria linearifolia F. W. Peirson 1921-5-19 2757 Los Angeles Little Rock Creek 945 Comment
  RSA91855  Crypsis vaginiflora F. W. Peirson 1906-7-19 1572 Los Angeles Inglewood. Comment
  RSA91966  Elymus elymoides subsp. californicus F. W. Peirson 1922-7-6 3153 Los Angeles Pleasant View Ridge, San Gabriel Mountains. 2561 Comment
  RSA92049  Bromus carinatus F. W. Peirson 1918-04 1560 Los Angeles Altadena. Comment
  RSA92162  Schoenoplectus californicus F. W. Peirson 1906-7-19 1614 Los Angeles Inglewood. Comment
  RSA92163  Schoenoplectus californicus F. W. Peirson 1918-4-28 1612 Los Angeles Road east and south of El Monte. Comment
  RSA92186  Lagophylla ramosissima F. W. Peirson 1358 Los Angeles Montana St. Pasadena Comment
  RSA92262  Achyrachaena mollis F. W. Peirson 1918-4-28 2495 Los Angeles Turnbull Canyon near Whittier, Puente Hills. Comment
  RSA92322  Poa secunda var. secunda F. W. Peirson 1920-5-9 5366 Los Angeles Summit of Mt. Wilson. 1753 Comment
  RSA92323  Poa secunda var. secunda F. W. Peirson 1918-6-10 5367 Los Angeles Summit of San Gabriel Peak 1860 Comment
  RSA92371  Poa annua F. W. Peirson 1922-7-6 4201 Los Angeles Big Pines Camp 2088 Comment
  RSA92386  Ancistrocarphus filagineus F. W. Peirson 1919-5-10 1302 Los Angeles Arraster [Arrastre] Creek. North base of San Gabriel Mountains 915 Comment
  RSA92389  Eriophyllum nevinii F. W. Peirson 1923-4-10 3477 Los Angeles North slopes or on sea bluffs, San Clemente Island Comment
  RSA92428  Helianthus gracilentus F. W. Peirson s.n. Los Angeles Verdugo Mountains Comment
  RSA92656  Eriophyllum confertiflorum var. confertiflorum F. W. Peirson 1920-9-12 2276 Los Angeles South trail to Mt. San Antonio 2438 Comment
  RSA92684  Eriophyllum confertiflorum var. confertiflorum F. W. Peirson 1923-9-1 4029 Los Angeles San Gabriel Mountains. 2011 Comment
  RSA92987  Lasthenia coronaria F. W. Peirson 1921-3-3 330 Los Angeles Arroyo Seco, near Pasadena 350 Comment
  RSA93291  Corethrogyne filaginifolia var. filaginifolia F. W. Peirson 1918-10-16 270 Los Angeles Pacoima Canyon 518 Comment
  RSA93733  Acamptopappus sphaerocephalus F. W. Peirson 1921-5-19 2407 Los Angeles Little Rock Creek: north base of San Gabriel Mountains 976 Comment
  RSA93861  Encelia californica F. W. Peirson 1919-2-16 1335 Los Angeles Point Fermin. Comment
  RSA94116  Brickellia californica F. W. Peirson 1924-10-26 5262 Los Angeles Arroyo Seco below California Street bridge, Pasadena 198 Comment
  RSA94367  Chaenactis glabriuscula F. W. Peirson 1919-5-21 243 Los Angeles Arroyo Seco, Pasadena. 533 Comment
  RSA94394  Chaenactis fremontii F. W. Peirson 1921-5-19 2409 Los Angeles Little Rock Creek: N slope of San Gabriel Mountains 960 Comment
  RSA94530  Artemisia californica F. W. Peirson 1918-10-16 245 Los Angeles Pacoima Canyon, west end of San Gabriel Mts. 534 Comment
  RSA94544  Packera ionophylla F. W. Peirson 1907-7-9 1591 Los Angeles Pine Flats at the headwaters of the Tujunga 1677 Comment
  RSA94631  Rigiopappus leptocladus F. W. Peirson 1922-6-3 3076 Los Angeles At Collins Ranch, north slope of Liebre Mts. 1143 Comment
  RSA94810  Acourtia microcephala F. W. Peirson 1919-7-1 520 Los Angeles South base of San Gabriel Mtns, Fish Canyon. 457 Comment
  RSA94821  Hypochaeris radicata F. W. Peirson 1920-6-13 2136 Los Angeles Colorado Street, Pasadena Comment
  RSA95002  Malacothrix glabrata F. W. Peirson 1923-5-27 4313 Los Angeles Pallett Creek, tributary to Rock Creek, north slope of San Gabriel Mts. 1097 Comment
  RSA95062  Hemizonia australis F. W. Peirson 1951-1 1350 Los Angeles at 1085 New York Drive, Altadena. Comment
Read comments
Apr 1 2009
  RSA95065  Hemizonia pungens F. W. Peirson 1919-8-30 1351 Los Angeles Desert between Mojave and Lancaster. Comment
  RSA95086  Microseris douglasii subsp. tenella F. W. Peirson 1918-5-5 1466 Los Angeles Road from Brents on the Malibu, Santa Monica Mountains Comment
  RSA95180  Hieracium argutum F. W. Peirson 1918-8-6 258 Los Angeles Trail to Sierra Madre; San Gabriel Mts. 823 Comment
  RSA95183  Anisocoma acaulis F. W. Peirson 1921-5-19 1468 Los Angeles Little Rock Creek: north base of San Gabriel Mountains 1037 Comment
  RSA95326  Malacothamnus fasciculatus F. W. Peirson 1918-6-19 109 Los Angeles San Antonio Canyon Wash, south base of San Gabriel Mts. Comment
  RSA95346  Ceanothus oliganthus var. oliganthus F. W. Peirson, Ruth Conrad 1926-3-20 6513 Los Angeles Arroyo Seco. 1006 Comment
  RSA97246  Lomatium vaginatum F. W. Peirson 1926-4-26 6647 Los Angeles Summit of Mint Canyon Grade, northwest part of San Gabriel Mts. Comment
  RSA97382  Lomatium nevadense var. parishii F. W. Peirson 1919-6-14 473 Los Angeles Rock Creek, north slope of San Gabriel Mountains 1707 Comment
  RSA97392  Osmorhiza brachypoda F. W. Peirson 1919-5-21 451 Los Angeles Arroyo Seco Canyon, near Pasadena. 610 Comment
  RSA98322  Oenanthe sarmentosa F. W. Peirson 1908-5-22 804 Los Angeles Bixby Ranch near Long Beach. Comment
  RSA98334  Berula erecta F. W. Peirson 1920-6-22 2206 Los Angeles Bassett, near El Monte. Comment
  UC501517  Chenopodium pumilio Frank W. Peirson 1919-11-12 1823 Los Angeles Hollister Ave between The Boulevard and Mendocino St.; Altadena Comment
  UC555539  Lotus procumbens var. procumbens Frank W. Peirson 1919-6-15 Los Angeles Rock Creek San Gabriel Mts., Pine Ridge 1371 Comment
  RSA72347  Epilobium canum subsp. latifolium F. W. Peirson 1914-8-18 756 Madera Shadow Lake, north of Devil s Post Pile, Sierra Nevada. 2744 Comment
  CAS-BOT-BC18111  Carex athrostachya Frank W. Peirson 1934-7-18 11267 Madera Middle Fork San Joaquin River. Pumice Flat. 2316 Comment
  RSA72191  Epilobium ciliatum subsp. glandulosum F. W. Peirson 1914-8-15 767 Madera Devils Post Pile, Sierra Nevada 2317 Comment
  RSA80367  Heracleum maximum F. W. Peirson 1914-8-15 807 Madera Devil s Post Pile, Sierra Nevada. Comment
  RSA91449  Trifolium longipes subsp. hansenii F. W. Peirson 1914-8-15 556 Madera Devils Post Pile, Sierra Nevada 2317 Comment
  RSA92105  Cyperus squarrosus F. W. Peirson 1914-8-15 1610 Madera Devils Post Pile. Sierra Nevada. 2332 Comment
  RSA77581  Myosotis latifolia F. W. Peirson 1926-3-28 6538 Marin Elk Valley. Comment
  RSA85820  Cupressus sargentii F. W. Peirson 1925-10-3 6448 Marin Near summit on northwest slope of Mt. Tamalpais Comment
  POM175484  Hypericum concinnum Mabel Peirson 1926-5-31 2071 Marin Mt. Tamalpais Comment
  RSA70399  Chamaesyce serpillifolia F. W. Peirson 1925-10-3 6458 Marin Trail along north foot of Mt. Tamalpais. Comment
  RSA80645  Hypericum concinnum Mabel Peirson 1926-5-31 2071 Marin Mt. Tamalpais Comment
  RSA97395  Sanicula arctopoides Mabel Peirson 1926-3-28 7297 Marin Marin County: Elk Valley Comment
  PASA2866  Ribes montigenum F. W. Peirson 1921-7-8 Y 93 Mariposa Ten Lakes Comment
  PASA2880  Sambucus racemosa F. W. Peirson 1921-7-8 Y 97 Mariposa Ten Lakes Comment
  PASA2883  Kalmia polifolia var. microphylla F. W. Peirson 1921-7-8 Y 99 Mariposa Ten Lakes Comment
  PASA340  Scorzonella nutans Frank W. Peirson 1927-8-6 Mariposa Porcupine Flat 2438 Comment
  RSA80339  Heracleum maximum F. W. Peirson 1927-8-6 7665 Mariposa Porcupine Flat 2439 Comment
  PASA2777  Gilia leptalea F. W. Peirson 1921-7-3 Y 71 Mariposa above Little Yosemite Comment
  PASA2806  Mertensia sibirica F. W. Peirson 1921-7-9 Y 106 Mariposa Ten Lakes trail Comment
  PASA2849  Ribes roezlii F. W. Peirson 1921-7-1 Y 46 Mariposa above Lake Merced Comment
  PASA2882  Streptanthus tortuosus var. orbiculatus F. W. Peirson 1921-7-8 Y 96 Mariposa above ""Dream Lake"", Ten Lakes Comment
  RSA0057785  Philadelphus lewisii F. W. Peirson 1910-7-8 1950 Mariposa Bridal Veil Falls, Yosemite National Park, Sierra Nevada. Comment
  RSA65551  Arenaria aculeata F. W. Peirson 1927-8-5 7645 Mariposa North end of Lake Tenaya, Sierra Nevada. Comment
  RSA91744  Muhlenbergia montana F. W. Peirson 1935-7-19 11535 Mariposa Glaciated region north of Lake Tenaya, Sierra Nevada. 2500 Comment
  RSA91850  Danthonia californica var. americana F. W. Peirson 1930-8-16 9235 Mariposa in canyon below Lake Tenaya 2470 Comment
  RSA92103  Cyperus squarrosus F. W. Peirson 1930-8-17 9241 Mariposa Meadow opposite Glacier Point, floor of Yosemite Valley, Yosemite National Park 1220 Comment
  RSA92238  Madia minima F. W. Peirson 1935-7-19 s.n. Mariposa Glaciated region north of Lake Tenaya, Sierra Nevada. 2500 Comment
  JEPS37268  Senecio jacobaea F. W. Peirson 1923-7-8 3927 Mendocino Ft. Bragg Comment
  PASA2178  Baeria macrantha Frank W. Peirson 1925-8-10 Mendocino Jug-Handle Creek Comment
  POM87053  Veratrum fimbriatum Frank W. Peirson 1925-8-10 6402 Mendocino Jug Handle Creek, Mendocino County Comment
  RSA100284  Campanula californica F. W. Peirson 1925-8-10 6372 Mendocino Jug Handle Creek, 6 miles north of Mendocino City. Comment
  RSA66704  Streptanthus barbiger F. W. Peirson 1923-7-7 3732 Mendocino 3 miles above Boonville Comment
Read comments
Aug 14 2013
  RSA77434  Angelica hendersonii F. W. Peirson 1925-8-10 6357 Mendocino Jug Handle Creek, 6 miles north of Mendocino City Comment
  RSA79882  Datura stramonium F. W. Peirson 1932-7-6 10252 Mendocino Navarro River. Dimmick Memorial Park. Comment
  RSA80379  Daucus pusillus F. W. Peirson 1925-8-10 6358 Mendocino Jug Handle Creek, 6 miles north of Mendocino City. Comment
  RSA86528  Picea sitchensis F. W. Peirson 1923-7-8 3963 Mendocino 5 miles north of Mendocino City. Comment
  RSA86710  Lolium temulentum F. W. Peirson 1923-6-6 3648 Mendocino Indian Creek, southern Mendocino County Comment
  RSA87346  Galium aparine F. W. Peirson 1932-7-6 10247 Mendocino Navarro River. Dimmick Memorial Park. Comment
  SD87798  Dudleya farinosa Frank W. Peirson 1925-8-10 6371 Mendocino Jug Handle Creek. Comment
  UC501421  Phalaris californica Frank W. Peirson 1932-7-6 10257 Mendocino road from Westport Hale's Grove Auto Camp Comment
  UC501424  Trichostema laxum Frank W. Peirson 1932-7-6 10248 Mendocino Dimmick Memorial Park, Navarro River Comment
  UC501546  Nemophila heterophylla Frank W. Peirson 1926-4-1 6553 Mendocino 5 mi n Cloverdale; n of Cloverdale Comment
  CAS-BOT-BC427027  Lithophragma affine Frank W. Peirson 1926-4-2 4640 Mendocino Near foot of Hopland Grade Comment
  PASA1279  Spergularia rubra var. perennans Frank W. Peirson 1925-8-10 Mendocino Albion Comment
  PASA2566  Delphinium variegatum Frank W. Peirson 1926-4-2 6564 Mendocino Foot of Hopland Grade Comment
  POM87156  Madia gracilis subsp. gracilis F. W. Peirson 1925-8-10 6366 Mendocino Jug Handle Creek. Comment
  RSA0011291  Lythrum hyssopifolia F. W. Peirson 1923-7-7 3787 Mendocino Indian Creek. Comment
  RSA0070582  Cirsium brevistylum F. W. Peirson 1925-8-10 6365 Mendocino Jug Handle Creek, 6 miles north of Mendocino City. Comment
  RSA0098127  Spergularia rubra F. W. Peirson 1925-8-10 6409 Mendocino Albion. Comment
  RSA65518  Sagina maxima subsp. crassicaulis F. W. Peirson 1923-7-8 3720 Mendocino Jug-Handle Creek, 5 miles N of Mendocino City. Comment
  RSA65805  Lepidium didymum F. W. Peirson 1925-8-10 6411 Mendocino Grade down to the stream at Albion Comment
  RSA68961  Plantago maritima F. W. Peirson 1823-7-8 3858 Mendocino Bottom of Jug Handle Creek, about 6 miles north of Mendocino City. Sea level. 0 Comment
Read comments
Aug 29 2012
  RSA69744  Luzula parviflora F. W. Peirson 1941-7-23 13092 Mendocino Van Damme State Park. Near sea level. Comment
  RSA70278  Juncus patens F. W. Peirson 1941-7-23 13090 Mendocino Van Damme State Park. Near sea level. Comment
  RSA70585  Sisyrinchium bellum Frank W. Peirson 1923-7-7 3694 Mendocino On coast 1 mile north of the Navarro River. Comment
  RSA80699  Circaea alpina subsp. pacifica F. W. Peirson 1923-7-8 3789 Mendocino 3 miles up Ten-Mile River Comment
  RSA80704  Circaea alpina subsp. pacifica F. W. Peirson 1941-7-23 s.n. Mendocino Van Damme State Park. Near sea level. 0 Comment
  RSA82577  Stachys chamissonis F. W. Peirson 1923-7-7 3829 Mendocino Coast near Little River Comment
  RSA83446  Mentha pulegium F. W. Peirson 1923-7-7 3838 Mendocino Just south of Wendling Comment
  RSA84291  Tiarella trifoliata var. unifoliata F. W. Peirson 1941-7-23 s.n. Mendocino Van Damme State Park. Near sea level. Comment
  RSA84327  Tolmiea menziesii F. W. Peirson 1925-8-10 6384 Mendocino Jug Handle Creek, about 0.5 miles from ocean; 6 miles north of Mendocino City. Comment
  RSA85534  Vancouveria planipetala F. W. Peirson 1941-7-23 s.n. Mendocino About 2 miles up the stream at Van Damme State Park. Comment
  RSA88647  Carex barbarae F. W. Peirson, Mabel Peirson 1926-4-1 6559 Mendocino Near Russian River, Hopland. Comment
  RSA90194  Aira caryophyllea F. W. Peirson 1925-8-10 6368 Mendocino Jug Handle Creek 6 miles north of Mendocino City. Comment
  RSA90376  Lotus formosissimus F. W. Peirson 1923-7-7 3603 Mendocino On coast 1 mile north of the Navarro River. Comment
  RSA90398  Lotus unifoliolatus F. W. Peirson 1941-7-23 13093 Mendocino Van Damme State Park. Comment
  RSA91327  Lupinus arboreus var. arboreus F. W. Peirson 1923-7-9 3613 Mendocino 4 miles north of Westport. Comment
  RSA91662  Carex obnupta F. W. Peirson 1932-7-6 10244 Mendocino Dimick Memorial Park. Navarro River. Comment
  RSA91983  Holcus lanatus F. W. Peirson 1941-7-23 13120 Mendocino Van Damme State Park. Near sea level. Comment
  RSA92849  Madia capitata F. W. Peirson 1923-7-6 3907 Mendocino Indian Creek, southern Mendocino Co. Comment
  RSA93119  Corethrogyne filaginifolia var. californica F. W. Peirson 6416 Mendocino Sea bluffs 1 mile south of Albion Comment
  RSA93194  Erigeron glaucus F. W. Peirson 1925-8-10 6364 Mendocino Jug Handle Creek, 6 miles N of Mendocino City Comment
  RSA93398  Sherardia arvensis F. W. Peirson 1923-7-9 3860 Mendocino Top of grade 8 miles N of Westport. Comment
  RSA94833  Centaurea melitensis F. W. Peirson 1923-7-6 435 Mendocino Indian Creek, southern Mendocino Co. Comment
  RSA94844  Senecio vulgaris F. W. Peirson 1941-7-23 s.n. Mendocino Opening woods three miles back from beach at Van Dammes State Park. Comment
  RSA95038  Erechtites minimus F. W. Peirson 1925-8-9 6354 Mendocino Coast Range 8 miles east of Mendocino City, on road to Ukiah. Comment
  RSA97169  Garrya elliptica F. W. Peirson 1925-8-10 6375 Mendocino Jug Handle Creek, 6 miles north of Mendocino City. Comment
  RSA98325  Oenanthe sarmentosa F. W. Peirson 1923-7-7 3941 Mendocino Navarro River within one mile of ocean Comment
  SEINET10463894  Campanula californica Frank W. Peirson 1925-8-10 Peirson 6372 Mendocino JUG HANDLE CREEK, 6 MI N OF MENDOCINO CITY DEPRESSION IN SEA BLUFF Comment
  CAS-BOT-BC14899  Crepis intermedia Frank Warrington Peirson 1926-6-25 6873 Modoc Cedarville Pass, Warner Mountains Comment
  CAS-BOT-BC179181  Hesperolinon micranthum Frank Warrington Peirson 1926-6-25 6858 Modoc Cedarville Road, about 10 mi. E of Alturas. Comment
  CAS-BOT-BC197983  Navarretia intertexta subsp. propinqua Frank Warrington Peirson 1926-6-25 6868 Modoc Cedarville Pass, Warner Mts. Comment
  POM182007  Floerkea proserpinacoides F. W. Peirson 1926-6-25 6888 Modoc 1 mile east of summit of Cedarville Road, Warner Mountains Comment
  RSA64614  Eriogonum sphaerocephalum var. halimioides F. W. Peirson 1926-7-25 6859 Modoc Cedarville Rd. west slope of Warner Mts. Comment
  RSA70026  Sarcobatus vermiculatus F. W. Peirson 1926-6-26 6901 Modoc between Alturas and Canby Comment
  RSA80247  Orthocarpus cuspidatus subsp. copelandii F. W. Peirson 1926-6-25 6871 Modoc Summit of grade, Cedarville Pass, Warner Mountains. Comment
  POM175555B  Nemophila parviflora var. austiniae F. W. Peirson 1926-6-25 6896 Modoc Small side canyon 1 mile east of summit of Warner Mountains on Cedarville Road. Comment
  POM98606  Allium acuminatum F. W. Peirson 1926-6-25 6874 Modoc Cedarville Road, Warner Mountains. Comment
  RSA0012468  Senecio serra var. serra F. W. Peirson 1926-6-25 6882 Modoc 1 mile east of summit of Warner Mts. on Cedarville Road. Comment
  RSA0117237  Collinsia parviflora F. W. Peirson 1926-6-25 6891 Modoc Small side canyon 1 mile east of summit of Warner Mountains on Cedarville Road. Comment
  RSA69712  Mentzelia dispersa F. W. Peirson 1926-6-26 6899 Modoc Roadside, Alturas to Canby. Comment
  RSA91388  Hesperolinon micranthum F. W. Peirson 1926-6-25 6858 Modoc Cedarville road about 10 miles east of Altura. Comment
  RSA95000  Agoseris glauca var. dasycephala F. W. Peirson 1926-6-25 6884 Modoc Small side canyon 1 mile east of summit of Warner Mountains on Cedarville Road. Comment
  CAS-BOT-BC100603  Brickellia oblongifolia var. linifolia F. W. Peirson 1927-7-25 7554 Mono Convict Lake 2316 Comment
  CAS-BOT-BC119805  Carex nebrascensis Frank Warrington Peirson 1925-6-25 6082 Mono Rock Creek 2072 Comment
  CAS-BOT-BC187272  Astragalus lentiginosus var. ineptus Frank W. Peirson 1933-7-29 10743 Mono Along Hilton Creek, Owens River 2042 Comment
  CAS-BOT-BC21935  Carex heteroneura Frank W. Peirson 1935-8-4 11732 Mono Sonora Pass Region. About 2 miles southeast of Pass. 2743 Comment
  CAS-BOT-BC246531  Eriogonum elatum var. elatum Frank W. Peirson 1925-6-25 6055 Mono Rock Creek 2072 Comment
  CAS-BOT-BC25547  Boechera retrofracta Frank W. Peirson 1934-7-10 11175 Mono Virginia Lake Basin. Near Cooney Lake. 3139 Comment
  JEPS16603  Saxifraga rivularis Mabel B. Peirson 1927-8-3 Mono Mount Dana; Seirra Nevada, Mount Dana 3352 Comment
  JEPS18772  Brickellia microphylla var. microphylla Frank W. Peirson 1933-8-23 10852 Mono summit of Sherwin Hill Sherwin Hill 1950 Comment
  JEPS22398  Atriplex pusilla Frank W. Peirson 1937-8-1 12154 Mono Long Valley , Long Valley (Hot Creek Region) 2103 Comment
  JEPS23654  Thelypodium crispum Frank W. Peirson 1937-8-1 12167 Mono Hot Creek region Long Valley 2103 Comment
  JEPS3852  Castilleja pilosa Frank W. Peirson 1937-8-1 12160 Mono Long Valley; Hot Creek Region 2103 Comment
  JEPS54764  Astragalus newberryi var. newberryi Frank W. Peirson 1938-7-8 12442 Mono near windmill (Hot Creek Region); Hot Creek Region 2133 Comment
  JEPS54865  Astragalus kentrophyta var. danaus Frank W. Peirson 1934-7-12 11191 Mono open alpine terraine in Pass at head Virginia Lakes Basin 3383 Comment
  JEPS86232  Eremothera boothii subsp. intermedia Frank W. Peirson 1933-7-31 Mono Mono Craters 2286 Comment
  PASA2203  Helenium hoopesii Frank W. Peirson 1932-7-23 Mono East slope Sonora Pass 2590 Comment
  POM203895  Crepis nana subsp. ramosa F. W. Peirson 1934-7-15 11202 Mono Cirque above Red Lake, Virginia Lakes Basin 3232 Comment
  POM212913  Astragalus lentiginosus var. ineptus F. W. Peirson 1935-8-4 11648 Mono Sonora Pass Region, 1.5 miles S of Pass in small rocky canyon. 2744 Comment
  RSA409240  Collomia linearis F. W. Peirson 1933-7-29 s.n. Mono Owens River. Floor of Crooked Creek Canyon in meadow land. 2043 Comment
  RSA64761  Eriogonum umbellatum var. chlorothamnus F. W. Peirson 1934-7-8 11158 Mono Along summit of grade on Sherwin Hill 1951 Comment
  RSA65106  Eriogonum esmeraldense var. esmeraldense F. W. Peirson 1914-8-25 1739 Mono Northern part of volcanic tableland. Crooked Creek. 2043 Comment
  RSA66015  Eriogonum nudum var. scapigerum F. W. Peirson 1930-8-7 9123 Mono West shore of Ruby Lake, where stream from Mono Pass enters it. Rock Creek Lake Basin, Sierra Nevada 3399 Comment
Read comments
Feb 12 2020
  RSA66512  Arabis platysperma var. howellii F. W. Peirson 1934-7-12 11332 Mono In pass at the head of Virginia Lakes Basin. 3384 Comment
  RSA66833  Thelypodium integrifolium subsp. complanatum F. W. Peirson 1930-8-12 9201 Mono Mono Lake. 1966 Comment
  RSA67126  Galium hypotrichium subsp. hypotrichium F. W. Peirson 1934-7-16 11251 Mono Virginia Lakes Basin. 2988 Comment
  RSA68343  Lepidium montanum var. canescens F. W. Peirson 1914-8-25 675 Mono Crooked Creek 2043 Comment
  RSA69219  Cassiope mertensiana subsp. californica F. W. Peirson 1925-6-27 6126 Mono Rush Creek, Sierra Nevada. 2927 Comment
  RSA69256  Kalmia polifolia subsp. microphylla F. W. Peirson 1934-7-12 11188 Mono Virginia Lakes, Sierra Nevada. 3201 Comment
  RSA69535  Maianthemum stellatum Frank W. Peirson 1925-6-25 6056 Mono [Lower] Rock Creek, Sierra Nevada 2073 Comment
  RSA69552  Mentzelia torreyi F. W. Peirson 1930-8-12 9200 Mono Mono Lake 1966 Comment
  RSA69732  Luzula orestera F. W. Peirson 1927-7-29 7588 Mono Slate Creek, Sierra Nevada. 3018 Comment
  RSA70593  Iris missouriensis Frank W. Peirson 1934-7-12 11186 Mono Upper lake basin, Virginia Lakes, Sierra Nevada. 3201 Comment
  RSA75375  Camissonia boothii subsp. boothii F. W. Peirson 1930-8-12 9198 Mono North shore of Mono Lake 1966 Comment
  RSA78521  Carex exserta F. W. Peirson 1937-7-30 13608 Mono Lundy. 2470 Comment
  RSA80409  Mimulus nanus var. mephiticus F. W. Peirson 1925-6-29 6156 Mono South of Bridgeport on road to Mono Lake. Comment
  RSA83946  Saxifraga tolmiei F. W. Peirson 1934-7-10 11167 Mono Below Cooney Lake, Virginia Lakes Basin. 3110 Comment
  RSA84483  Aconitum columbianum var. columbianum F. W. Peirson 1935-8-4 11650 Mono About 2 miles southeast of Sonora Pass 2622 Comment
  RSA85226  Horkelia fusca subsp. parviflora F. W. Peirson 1925-6-27 6125 Mono Rush Creek. 2896 Comment
  RSA85762  Potentilla glandulosa var. nevadensis F. W. Peirson 1925-6-25 6063 Mono [Lower] Rock Creek. 2073 Comment
  RSA86686  Leymus triticoides F. W. Peirson 1934-7-8 6700 Mono foot of Whiskey Creek, Owens River 2043 Comment
  RSA87419  Lupinus polyphyllus subsp. superbus F. W. Peirson 1935-8-4 11656 Mono Along east slope of main range, ca. 1.5 miles east of Sonora Pass, Sierra Nevada. 2835 Comment
  RSA88688  Carex pellita F. W. Peirson 1925-6-25 6081 Mono Rock Creek 2073 Comment
  RSA88780  Carex scopulorum var. bracteosa F. W. Peirson 1935-8-4 11731 Mono About 1.5 miles south of Sonora Pass. 2805 Comment
  SBBG54432  Leptosiphon ciliatus F. W. Peirson 1925-6-28 6131 Mono Reverse Crk, Silver Lake Region 2225 Comment
  SBBG98317  Brickellia microphylla F. W. Peirson 1934-7-30 Mono Sherwin Hill, W of rd 1950 Comment
  SD87663  Phacelia bicolor Frank W. Peirson 1925-6-25 6068 Mono Rock Creek 2073 Comment
  SD87667  Alopecurus aequalis Frank W. Peirson 1937-7-30 12993 Mono Lundy Canyon (Mill Creek). In moist soil near stream at camp. 2469 Comment
  SD87783  Atriplex pusilla Frank W. Peirson 1937-8-1 12154 Mono Long Valley, Hot Creek region, near windmill. 2105 Comment
Read comments
Apr 3 2015
  SEINET210457  Claytonia nevadensis F. W. Peirson 1934-7-15 11231 Mono Virginia Lakes Basin Sierra Nevada 3170 Comment
  UC483084  Salix jepsonii Frank W. Peirson 1932-7-22 10374 Mono along Robinson Creek below Barney Lake; Twin Lake Basin 2438 Comment
  UC511806  Pedicularis crenulata Frank W. Peirson 1933-7-30 Mono Convict Creek 2148 Comment
  UC570573  Phacelia humilis Frank W. Peirson 1935-8-4 11661 Mono about 2 mi se Pass; Sonora Pass Region 2621 Comment
  UC599189  Eriogonum hookeri Frank W. Peirson 1938-7-10 12465 Mono 18 mi s Benton Station 1371 Comment
  UC599225  Mimulus nanus var. mephiticus Frank W. Peirson 1938-7-9 12445 Mono e base Mono Craters 2133 Comment
  UC599240  Sporobolus airoides Frank W. Peirson 1938-7-10 12464 Mono 18 mi. s. Benton Station 1371 Comment
  UC908927  Gilia subacaulis Frank W. Peirson 1925-6-25 6072 Mono Rock Creek Rock Creek (Volcanic Tableland) 2072 Comment
  CAS-BOT-BC159248  Diplacus Frank W. Peirson 1927-7-26 7566 Mono Gull Lake 2316 Comment
  CAS-BOT-BC332950  Senecio spartioides Frank W. Peirson 1930-8-11 9179 Mono North of Deadman Creek 2438 Comment
  CAS-BOT-BC334717  Madia gracilis Frank W. Peirson 1927-7-27 7572 Mono Silver Lake 2255 Comment
  CAS-BOT-BC346368  Psorothamnus arborescens Frank W. Peirson 1938-7-10 12453 Mono W slope of the White Mountains 1584 Comment
  CAS-BOT-BC362274  Pyrrocoma lanceolata var. lanceolata F. W. Peirson 1933-7-29 10749 Mono Along the river road south of Whisky Creek and on river flats, Owens River 2042 Comment
  JEPS27173  Caulanthus pilosus Frank W. Peirson 1938-7-9 Mono 1 1/2 mi sw Benton; sw of Benton 1950 Comment
  JEPS4247  Collinsia parviflora Frank W. Peirson 1935-7-18 Mono near site of old saw mill Slate Creek 3017 Comment
  PASA1949  Oreocarya confertiflora Frank W. Peirson 1933-8-1 Mono North shore, Mono Lake 1965 Comment
  PASA2726  Astragalus gibbsii Frank W. Peirson 1925-6-29 6153 Mono Mono Lake to Bridgeport Comment
  POM146796  Eriogonum spergulinum var. reddingianum F. W. Peirson 1927-7-26 s.n. Mono Volcanic Mountains between Deadman Creek and June Lake 2439 Comment
  POM203898  Claytonia nevadensis F. W. Peirson 1934-7-15 11231 Mono Growing in the rocky bed of the stream flowing into Red Lake; 3171 Comment
  POM203907  Wyethia mollis F. W. Peirson 1934-7-16 s.n. Mono Open spaces at west end of Blue Lake, Virginia Lakes Basin, east slope of Sierra Nevada 3018 Comment
  RSA0005463  Monardella odoratissima F. W. Peirson 1933-7-28 s.n. Mono Summit of Sherwin Hill, [north of Bishop] 1951 Comment
  RSA0011237  Vicia americana subsp. americana F. W. Peirson 1925-6-25 6059 Mono Rock Creek. 2073 Comment
  RSA0011815  Shepherdia argentea F. W. Peirson 1927-7-28 7581 Mono Margin of Lake Mono. 1959 Comment
  RSA0011821  Shepherdia argentea F. W. Peirson 1910-7-21 2078 Mono Along stream near Farrington's, Mono Valley. Comment
  RSA0013670  Senecio spartioides F. W. Peirson 1930-8-11 9179 Mono Volcanic mountains north of Deadman Creek. 2439 Comment
  RSA0117261  Collinsia parviflora F. W. Peirson 1925-6-25 6051 Mono [Lower] Rock Creek, Sierra Nevada. 2073 Comment
  RSA445017  Sphaeralcea ambigua subsp. monticola F. W. Peirson 1925-6-25 6032 Mono Sherwin Grade 1524 Comment
  RSA65018  Silene menziesii subsp. dorrii F. W. Peirson 1925-1-25 6058 Mono Rock Creek. 2073 Comment
  RSA65180  Eriogonum elatum var. elatum F. W. Peirson 1932-7-22 10362 Mono Steep slope along Robinson Creek below Barney Lake (Twin Lake Basin) 2378 Comment
  RSA65774  Cleome sparsifolia F. W. Peirson 1933-7-31 10761 Mono North shore Mono Lake. Comment
  RSA66012  Eriogonum nudum var. westonii F. W. Peirson 1938-7-8 12426 Mono Sherwin Grade. 1890 Comment
  RSA66041  Eriogonum baileyi var. baileyi F. W. Peirson 1933-7-29 10747 Mono Along road from the boulevard (Highway 395) to Owens River. 2043 Comment
  RSA66824  Thelypodium crispum F. W. Peirson 1933-7-29 10741 Mono Owens River. 2043 Comment
  RSA66830  Thelypodium laciniatum F. W. Peirson 1933-7-29 10723 Mono Crooked Creek Canyon, Owens Valley 2043 Comment
  RSA69398  Thalictrum sparsiflorum F. W. Peirson 1925-6-25 6044 Mono Rock Creek 1829 Comment
  RSA69449  Juncus chlorocephalus F. W. Peirson 1935-7-18 11525 Mono At the old saw mill, Slate Creek 3018 Comment
  RSA70265  Juncus macrandrus F. W. Peirson 1930-8-12 9183 Mono Mono Lake, back of lake shore 1966 Comment
  RSA70590  Sisyrinchium idahoense var. idahoense Frank W. Peirson 1937-7-30 12141 Mono Mill Creek (Lundy Canyon). 2470 Comment
  RSA70595  Iris missouriensis Frank W. Peirson 1910-7-20 1691 Mono Meadows north of Silver Lake, Sierra Nevada 2195 Comment
  RSA72638  Wyethia mollis F. W. Peirson 1932-7-22 10368 Mono Steep slope below Barney Lake, along Robinson Creek, Twin Lake Basin. 2439 Comment
  RSA74777  Phacelia ramosissima var. subglabra F. W. Peirson 1914-8-25 959 Mono Crooked Creek, upper part of Volcanic Tableland. 2043 Comment
  RSA75341  Phacelia bicolor F. W. Peirson 1925-6-25 6068 Mono Rock Creek. 2073 Comment
  RSA75695  Camissonia heterochroma F. W. Peirson 1934-7-8 11160 Mono Sherwin Hill 1951 Comment
  RSA78501  Carex spectabilis F. W. Peirson 1937-7-13 13566 Mono Lundy. 2470 Comment
  RSA79987  Castilleja pilosa subsp. jusselii F. W. Peirson 1937-8-1 12160 Mono Long Valley, Hot Creek region. 2104 Comment
  RSA83356  Monardella odoratissima subsp. glauca F. W. Peirson 1934-7-16 11257 Mono near Blue Lake, Virginia Lakes Basin 2744 Comment
  RSA84482  Aconitum columbianum var. columbianum F. W. Peirson 1925-6-28 6146 Mono Rush Creek below Silver Lake. 2165 Comment
  RSA85705  Potentilla gracilis var. elmeri F. W. Peirson 1937-7-30 12139 Mono Mill Creek (Lundy Canyon) 2470 Comment
  RSA85754  Potentilla flabellifolia F. W. Peirson 1934-7-15 11230 Mono Along the Red Lake Stream, Virginia Lakes Basin. 3171 Comment
  RSA90191  Astragalus casei F. W. Peirson 1930-8-12 9188 Mono Just back of willows on shore of Mono Lake. 1966 Comment
  RSA90256  Astragalus lentiginosus var. ineptus F. W. Peirson 1933-7-29 10743 Mono Along Hilton Creek, Owens River. 2043 Comment
  RSA90665  Chrysothamnus nauseosus subsp. consimilis F. W. Peirson 1914-8-25 s.n. Mono Northern part of Volcanic Tableland north of Bishop Comment
  RSA90712  Astragalus johannis-howellii F. W. Peirson 1938-7-8 12435 Mono Near the Hot creek Gorge, Ownes Valley 2195 Comment
  RSA90713  Astragalus lemmonii F. W. Peirson 1938-7-8 12614 Mono Hot Creek region 2134 Comment
  RSA90732  Astragalus canadensis var. brevidens F. W. Peirson 1930-8-12 9197 Mono North shore of Mono Lake 1966 Comment
  RSA91181  Lupinus caudatus F. W. Peirson 1933-7-29 10751 Mono Along road from the boulevard (Highway 395) to Owens River. 2043 Comment
  RSA92118  Carex nebrascensis F. W. Peirson 1935-8-4 11728 Mono Mono County: About 2 miles southeast of Sonora Pass 2622 Comment
  RSA92120  Carex nebrascensis F. W. Peirson 1925-6-28 6132 Mono Reverse Creek. 2287 Comment
  RSA93008  Erigeron pygmaeus F. W. Peirson 1934-7-12 11194 Mono In the pass at the upper end of Virginia Lakes Basin, Sierra Nevada 3384 Comment
  RSA93651  Antennaria media F. W. Peirson 1934-7-15 11232 Mono Red lake Cirque, Virginia Lakes Basin, Sierra Nevada 3232 Comment
  RSA93855  Chrysothamnus nauseosus subsp. albicaulis F. W. Peirson 1934-7-16 11259 Mono Virginia Lakes Basin near Blue Lake 3018 Comment
  RSA94147  Hulsea vestita subsp. vestita F. W. Peirson 1927-7-26 7563 Mono East side of Gull Lake 2317 Comment
  RSA94873  Arnica nevadensis F. W. Peirson 1934-7-16 11394 Mono Moraine near Virginia Lakes Resort, Virginia Lakes Basin, Sierra Nevada 2988 Comment
  RSA94977  Stephanomeria spinosa F. W. Peirson 1914-8-25 1489 Mono Northern part of volcanic tableland. Crooked Creek. 2043 Comment
  RSA94990  Agoseris parviflora F. W. Peirson 1925-6-26 6096 Mono North of Deadman Creek (Near Mammoth) 2439 Comment
  RSA95190  Arnica diversifolia F. W. Peirson 1937-7-30 12149 Mono Above the falls, Mill Creek, Lundy Canyon 2530 Comment
  RSA95280  Ceanothus velutinus F. W. Peirson 1925-6-26 6092 Mono Abundant at Convict Lake, E slope of Sierra Nevada. 2312 Comment
  RSA95317  Sphaeralcea ambigua subsp. monticola F. W. Peirson 1925-6-25 6032 Mono Sherwin Grade, north of Bishop 1524 Comment
  RSA97459  Osmorhiza occidentalis F. W. Peirson 1927-7-27 7569 Mono along stream, N end of Silver Lake, Sierra Nevada. 2256 Comment
  SD87598  Trifolium monoense Frank W. Peirson 1925-6-29 6154 Mono about half way from Mono Lake to Bridgeport Comment
  SD87748  Chenopodium leptophyllum Frank W. Peirson 1934-7-8 11162 Mono Owens River: dry shill slopes about Whisky Creek 2042 Comment
  SD87751  Eleocharis erythropoda Frank W. Peirson 1930-8-12 9182 Mono Mono Lake, ground wet from springs back from shore of lake. (IPB 10/07) 1958 Comment
  SEINET3888236  Smilacina stellata Frank W. Peirson 1935-8-4 11651 Mono Sonora Pass Region. About 2 miles southeast of Pass. Abundant around Willow thickets near stream.; 0 2621 Comment
  UC511737  Collomia linearis Frank W. Peirson 1933-7-29 10742 Mono in moist ground along Hilton Creek; Owens River 2042 Comment
  UC51180  Eremothera boothii subsp. desertorum Frank W. Peirson 1933-7-29 10733 Mono hill slopes about creek Owens River, Whisky Creek 2042 Comment
  UC599220 Image available Mentzelia nitens Frank W. Peirson 1938-7-9 12451 Mono 1 1/2 mi. sw Benton 1950 Comment
  UC599222  Abronia turbinata Frank W. Peirson 1938-7-9 12443 Mono At east base of Mono Craters Mono Craters Comment
  UC599223  Monolepis nuttalliana Frank W. Peirson 1938-7-8 12440 Mono near the windmill in low valley between hills Hot Creek Comment
  UC599242  Hesperostipa comata Frank W. Peirson 1938-7-8 12432 Mono between Owens River and the Boulevard; vicinity of Whisky Creek 2072 Comment
  UC638457  Potentilla biennis Frank W. Peirson 1934-7-8 Mono foot of Whisky Creek , foot of Whisky Creek (Owens River) 2042 Comment
  PASA413  Coreopsis bigelovii Frank W. Peirson 1925-3-24 Monterey Coalinga to Parkfield, Inner Coast Ranges 914 Comment
  RSA65195  Chorizanthe diffusa F. W. Peirson 1923-6-26 8665 Monterey About 3 miles from Monterey on road to Salinas. Comment
  RSA65854  Polygonum paronychia F. W. Peirson 1912-6-27 1794 Monterey Monterey. Comment
  RSA70892  Arctostaphylos tomentosa subsp. tomentosa F. W. Peirson 1923-6-25 3800 Monterey 3 miles up the Salinas road from Monterey. Comment
  RSA75938  Phacelia malvifolia F. W. Peirson 1937-7-19 12092 Monterey Along trail up Big Sur River. 305 Comment
  RSA77352  Ceanothus dentatus F. W. Peirson 1923-6-26 3768 Monterey 3 miles up the Salinas road from Monterey. Comment
  RSA83469  Satureja mimuloides F. W. Peirson 1936-7-13 11828 Monterey Along Nacimiento Creek, a branch of San Antonio River. 518 Comment
  RSA84359  Boykinia occidentalis F. W. Peirson 1937-7-19 12086 Monterey Big Sur River. Comment
  RSA85217  Horkelia californica F. W. Peirson 1923-6-27 4275 Monterey Southward from Pacific Grove Comment
  CAS-BOT-BC93660  Artemisia pycnocephala F. W. Peirson 1923-6-27 3918 Monterey Unspecified Comment
  PASA933  Hypochaeris radicata Frank W. Peirson 1923-6-26 Monterey 3 miles from Monterey on the Salinas Road Comment
  RSA0011308  Lythrum hyssopifolia F. W. Peirson 1923-6-26 8652 Monterey About 3 miles from Monterey on road to Salinas. Comment
  RSA65800  Lepidium perfoliatum F. W. Peirson 1923-6-26 3735 Monterey 3 miles up the Salinas River from Monterey Comment
  RSA90715  Astragalus nuttallii F. W. Peirson 1912-6-27 597 Monterey Monterey. Comment
  RSA91279  Isocoma menziesii var. vernonioides F. W. Peirson 1925-10-15 6466 Monterey Near King City. Comment
  RSA91281  Lessingia pectinata var. pectinata F. W. Peirson 1923-6-26 5300 Monterey About 3 miles from Monterey on road to Salinas. Comment
  RSA95290  Rhamnus ilicifolia F. W. Peirson 1937-7-19 12087 Monterey Along trail up Big Sur River. 229 Comment
  RSA95309  Rhamnus californica F. W. Peirson 1923-6-27 5313 Monterey 20 miles S of Monterey on Coast road Comment
  RSA85822  Cupressus sargentii F. W. Peirson, Mabel Peirson 1926-4-3 6623 Napa Northern edge of Napa County on Middletown Road Comment
  RSA80689  Boisduvalia densiflora var. densiflora F. W. Peirson 1928-7-4 7952 Napa Summit of Mt. Helena Grade Comment
  RSA77781  Viola adunca F. W. Peirson 1931-8-10 9574 Nevada Sierra Camp, 4 miles W of summit of Donner Pass. 2058 Comment
  RSA79593  Plagiobothrys torreyi F. W. Peirson 1931-8-10 9569 Nevada Near west end of Donner Lake, Sierra Nevada. 1829 Comment
Read comments
Feb 7 2008
  SEINET10840484  Heterocodon rariflorum Frank W. Peirson 1931-8-10 Peirson 9560 Nevada FLAT AT W END OF DONNER LAKE AT EDGE OF STREAM 9560 Comment
  CAS-BOT-BC255247  Chorizanthe staticoides Frank W. Peirson 1924-5-31 4644 Orange Laguna, near sea level Comment
  POM19058  Viola sheltonii F. W. Peirson 1923-5-6 3496 Orange Santiago Peak. 1677 Comment
  POM48464  Cirsium arvense F. W. Peirson 1924-10-19 5248 Orange Wintersberg. Comment
  RSA576457  Chamaesyce polycarpa var. polycarpa F. W. Peirson 1924-5-31 s.n. Orange 5 miles southeast of Laguna Beach. Comment
  RSA65193  Chorizanthe staticoides F. W. Peirson 1924-5-31 4644 Orange Sea bluffs at Laguna Beach. Comment
  RSA65740  Sesuvium verrucosum F. W. Peirson 1924-5-31 4655 Orange Laguna Canyon, near Laguna Beach 106 Comment
  RSA70997  Cuscuta californica F. W. Peirson 1923-9-7 4038 Orange Trail from Trabuco Canyon to Santiago Peak 1296 Comment
  RSA71006  Cuscuta ceanothi F. W. Peirson 1923-9-7 4037 Orange Trail from Trabuco Canyon to Santiago Peak. 1280 Comment
  RSA73085  Linanthus dianthiflorus subsp. dianthiflorus F. W. Peirson 1923-3-25 3369 Orange Aliso Creek, near Laguna Beach. Comment
  RSA74935  Phacelia davidsonii F. W. Peirson 1923-5-6 3499 Orange Summit of Santiago Peak. 1677 Comment
  RSA79829  Keckiella antirrhinoides F. W. Peirson 1922-5-18 3027 Orange Santa Ana River. 122 Comment
  RSA79880  Datura wrightii F. W. Peirson 1924-8-29 5095 Orange Road from Artesia to Hungtington Beach, along ditch Comment
  RSA82234  Castilleja affinis F. W. Peirson 1923-3-25 3376 Orange Aliso Canyon, near Laguna Beach. 152 Comment
  RSA84993  Adiantum jordanii F. W. Peirson 1924-5-31 4666 Orange 5 miles SE of Laguna Beach. Comment
  RSA85842  Marsilea vestita F. W. Peirson 1924-5-31 4645 Orange Laguna Canyon, near Laguna Beach 106 Comment
  SD87639  Helianthus nuttallii subsp. parishii F. W. Peirson 1924-10-19 5247 Orange Wintersberg Comment
  PASA1561  Jaumea carnosa Frank W. Peirson 1924-8-29 Orange 3 miles from Balboa on road inland along creek Comment
  PASA1804  Aster exilis Frank W. Peirson 1919-11-8 Orange Aliso Creek at Tie Canyon, San Gabriel Mts. Comment
  PASA1983  Cryptantha intermedia Frank W. Peirson 1923-3-26 Orange Canada Salada. Near sea level Comment
  RSA0097846  Spergularia macrotheca F. W. Peirson 1924-5-31 4658 Orange Laguna Canyon, Laguna Beach. 91 Comment
  RSA64787  Chenopodium murale F. W. Peirson 1924-2-10 5271 Orange Corona Del Mar. Comment
  RSA64797  Chenopodium macrospermum var. farinosum F. W. Peirson 1919-11-8 1826 Orange Aliso Creek. 0 Comment
  RSA66319  Polygonum lapathifolium F. W. Peirson 1924-10-19 5233 Orange Wintersberg Comment
  RSA69001  Samolus parviflorus F. W. Peirson 1924-10-19 s.n. Orange Wintersberg Comment
  RSA70218  Allium praecox F. W. Peirson 1923-3-18 4095 Orange Santa Ana River Canyon 122 Comment
  RSA77876  Heliotropium curassavicum var. oculatum F. W. Peirson 1924-8-29 5077 Orange 3 miles from Balboa Beach. Comment
  RSA90347  Lathyrus vestitus subsp. alefeldii F. W. Peirson 1925-4-11 5731 Orange slope above mill, in Silverado Canyon, Santa Ana Mountains 914 Comment
  RSA91198  Lupinus excubitus var. hallii F. W. Peirson 1925-4-10 5740 Orange In Silverado Canyon. 610 Comment
  RSA91618  Nassella lepida F. W. Peirson 1923-3-25 5362 Orange Aliso Creek, near Laguna Beach. Comment
  RSA92095  Cyperus niger var. capitatus F. W. Peirson 1924-10-19 5231 Orange Wintersberg Comment
  RSA92102  Cyperus esculentus F. W. Peirson 1923-9-6 4032 Orange Along canal east of Olive. Comment
  RSA92200  Jaumea carnosa F. W. Peirson 1924-8-29 5076 Orange 3 miles from Balboa Beach. Comment
  RSA92401  Bebbia juncea F. W. Peirson 1923-9-8 4043 Orange Trabucco Canyon. 427 Comment
  RSA93359  Heterotheca sessiliflora subsp. echioides F. W. Peirson 1924-8-29 5086 Orange 2.5 miles from Balboa on road inland along creek. Comment
  RSA94532  Artemisia californica F. W. Peirson 1919-11-8 1448 Orange On sea bluffs south of Arch Beach, Laguna Beach. Comment
  RSA94926  Cirsium arvense F. W. Peirson 1924-10-19 5248 Orange Wintersberg. Comment
  RSA95206  Stephanomeria exigua subsp. exigua F. W. Peirson 1923-3-18 3354 Orange Santa Ana River Canyon 122 Comment
  RSA97393  Osmorhiza brachypoda F. W. Peirson 1923-5-6 3502 Orange From Trabuco Canyon to Santiago Peak 1646 Comment
  RSA98320  Oenanthe sarmentosa F. W. Peirson 1924-2-9 4525 Orange Between Wintersberg and the sea. Comment
  SBBG29846  Downingia bacigalupii F. W. Peirson 1926-6-21 6802 Plumas ca. 0.5 mi back from N shore of Lake Almanor Comment
  UC501569  Sclerolinon digynum Frank W. Peirson 1932-7-19 10352 Plumas near Chester; Feather River 1463 Comment
  RSA80073  Mimulus moschatus F. W. Peirson 1932-7-19 10347 Plumas Along Feather River near Chester. 1463 Comment
  RSA82354  Agastache urticifolia F. W. Peirson 1926-6-21 6797 Plumas South shore Lake Almanor. Comment
  RSA91492  Scirpus congdonii F. W. Peirson 1932-7-19 10348 Plumas Feather River. Near Chester. 1463 Comment
  RSA92196  Hymenoxys lemmonii F. W. Peirson 1932-7-20 10356 Plumas North of Layalton, probably in Plumas Co. (in Sierra Valley) Comment
  RSA92448  Panicum acuminatum var. acuminatum F. W. Peirson 1926-6-22 6809 Plumas along muddy shores of Boiling Lake, or in the muddy flats back from it; Drakesbad, lassen National Park Comment
  RSA92639  Salix melanopsis F. W. Peirson 1932-7-19 10349 Plumas Feather River. Near Chester. 1463 Comment
  RSA95195  Sidalcea malviflora subsp. asprella F. W. Peirson 1926-6-21 6786 Plumas East slope of Sierra Nevada, Humboldt Road Comment
  SD87701  Madia exigua Frank W. Peirson 1926-6-21 6787 Plumas Lake Almanor Comment
  CAS-BOT-BC103904  Salix exigua Frank W. Peirson 1933-4-15 10650 Riverside Whitewater River, 4 1/2 miles above the bridge 701 Comment
  CAS-BOT-BC106225  Brickellia desertorum F. W. Peirson 1920-12-29 2336 Riverside Andreas Canyon, Colorado Desert 243 Comment
  CAS-BOT-BC109457  Sidotheca caryophylloides Frank W. Peirson 1924-7-29 5019 Riverside San Jacinto Mountains. Banning-Idlewild Road. 1767 Comment
  CAS-BOT-BC181570  Crossosoma bigelovii Frank W. Peirson 1922-4-9 s.n. Riverside Andreas Canyon - Colorado Desert 457 Comment
  CAS-BOT-BC195677  Distichlis spicata Frank W. Peirson 1922-4-29 4541 Riverside South of Lake Elsinore Comment
  CAS-BOT-BC227046  Leptosiphon floribundus subsp. glaber Frank W. Peirson 1922-4-28 946 Riverside Leach Canon [Canyon], Elsinore Region Comment
  CAS-BOT-BC246240  Chorizanthe rigida Frank W. Peirson 1922-4-11 2863 Riverside Deep Canyon Wash, 12 miles southeast of Palm Springs 243 Comment
  CAS-BOT-BC330345  Pentachaeta aurea F. W. Peirson 1922-5-19 3037 Riverside Road along San Jacinto River, San Jacinto Mts. 1143 Comment
  CAS-BOT-BC338933  Lasthenia californica F. W. Peirson 1922-4-29 4520 Riverside Lake Elsinore 374 Comment
  CAS-BOT-BC342257  Logfia filaginoides F. W. Peirson 1921-3-22 5277 Riverside Murray Canyon near Palm Springs 487 Comment
  CAS-BOT-BC361118  Lasthenia microglossa Peirson 1919-4-14 s.n. Riverside Murray Canon 487 Comment
  CAS-BOT-BC407623  Gilia ochroleuca subsp. exilis Frank W. Peirson 1938-5-30 12413 Riverside South of the Shell Gas station, Thomas Mountain, Hemet Valley Comment
  CAS-BOT-BC68029  Cryptogramma acrostichoides F. W. Peirson 1921-8-14 2557 Riverside Sierra Nevada - Triple Falls, Cartridge Creek 2438 Comment
  CAS-BOT-BC83347  Myosurus minimus Frank W. Peirson 1922-5-20 3035 Riverside About 1 mile belwo Kenworthy. Hemet Valley, San Jacinto Mountains. 1386 Comment
  CAS-BOT-BC95419  Bowlesia incana F. W. Peirson 1922-4-30 2954 Riverside about 1.5 mi.es from Temecula River on Hemet Road, Lancaster Valley 518 Comment
  JEPS4469  Stemodia durantifolia F. W. Peirson 1919-4-14 Riverside Mount San Jacinto, Palm Springs, foot of Murray Canyon Murray Canyon; Mount San Jacinto, Palm Springs Region, Murray Canyon Comment
  LA38933  Mimulus guttatus Frank W. Peirson; 1922-4-8 4720 Riverside Murray Canyon, Palm Springs. In lower part of canyon Comment
  PASA1050  Lathyrus alefeldii Frank W. Peirson 1922-4-28 Riverside Leach canyon, Elsinore Region 548 Comment
  PASA1119  Lotus tomentellus Frank W. Peirson 1927-4-12 Riverside Painted Canyon, Colorado Desert Comment
  PASA1957  Pectocarya setosa Frank W. Peirson 1921-3-21 Riverside Gordon Trail, east slope San Jacinto Mt. 1066 Comment
  PASA2160  Brickellia arguta Frank W. Peirson 1919-4-13 Riverside Along the Tahquitz stream, east of Palm Springs 152 Comment
  PASA2404  Ceanothus greggii var. perplexans Frank W. Peirson 1932-5-20 Riverside Hemet Valley, San Jacinto Mts. 1447 Comment
  PASA508  Brodiaea synandra Frank W. Peirson 1922-5-19 Riverside 2 miles southeast of Perris Comment
  PASA617  Cyperus laevigatus Frank W. Peirson 1924-12-30 Riverside Thousand Palms Canyon 121 Comment
Read comments
Jun 24 2016
  PASA627  Juncus canaliculatus Frank W. Peirson 1924-7-28 Riverside Pine Flats Camp, San Jacinto Mts. 1798 Comment
  POM14740  Chrysothamnus paniculatus F. W. Peirson 1922-12-26 3331 Riverside Cabazon, San Gorgonio Pass Comment
Read comments
Mar 13 2011
  POM193710  Allium peninsulare var. peninsulare F. W. Peirson 1933-4-15 10649 Riverside Whitewater River, 4.5 miles above the bridge. 701 Comment
  POM47633  Lotus argophyllus subsp. decorus F. W. Peirson 1919-4-13 s.n. Riverside Murray Canyon, Palm Springs region. Comment
  POM47635  Astragalus nuttallianus var. cedrosensis F. W. Peirson 1922-4-9 584 Riverside Murray Canyon. North bank, 1/2 mile above mouth. Comment
  POM48345  Tidestromia oblongifolia F. W. Peirson 1924-12-30 5416 Riverside Thousand-Palms Canyon 122 Comment
  RSA0070921  Pentagramma maxonii F. W. Peirson 1921-3-20 5357 Riverside Andreas Canyon, near Palm Springs. 243 Comment
  RSA446662  Stachys bullata F. W. Peirson 1924-6-21 4709 Riverside Temescal Canyon. 290 Comment
  RSA498417  Cercidium floridum F. W. Peirson 1919-4-15 575 Riverside Palm Springs. Large tree S of town. Comment
  RSA65002  Nemacaulis denudata var. gracilis F. W. Peirson 1917-4-1 1780 Riverside Palm Springs. Comment
  RSA65246  Chorizanthe rigida F. W. Peirson 1922-4-11 2863 Riverside Deep Canyon Wash, Coachella Valley 244 Comment
  RSA65309  Eriogonum thurberi F. W. Peirson 1922-5-19 4204 Riverside 5 miles northeast of Murrieta. Comment
  RSA65578  Spergularia platensis F. W. Peirson 1922-4-29 2926 Riverside South of Lake Elsinore. 381 Comment
  RSA65628  Callitriche marginata F. W. Peirson 1922-4-29 2943 Riverside South of Lake Elsinore. 381 Comment
  RSA65720  Claytonia parviflora subsp. utahensis F. W. Peirson 1921-3-22 2389 Riverside Murray Canyon near Palm Springs. 457 Comment
  RSA66188  Romneya coulteri F. W. Peirson 1920-6-22 2186 Riverside Temescal Canyon. 305 Comment
  RSA66236  Platystemon californicus F. W. Peirson 1922-5-21 3033 Riverside Along east side of Hemet Valley 1357 Comment
  RSA66307  Argemone munita subsp. munita F. W. Peirson 1925-5-20 6015 Riverside Burned area in chaparral, 1 mile northwest of Dripping Spring, W. Riverside Co. 457 Comment
  RSA66508  Arabis perennans F. W. Peirson 1922-4-10 2869 Riverside Murray Canyon near Palm Springs. 610 Comment
  RSA66544  Dithyrea californica F. W. Peirson 1920-2-14 4178 Riverside Whitewater Station, Colorado Desert Comment
  RSA66701  Arabis perennans F. W. Peirson 1919-4-13 660 Riverside Along the Tahquitz creek, East of Palm Springs, Riverside. Comment
  RSA67109  Myosurus minimus subsp. apus F. W. Peirson 1922-4-29 2945 Riverside South of Lake Elsinore. 381 Comment
  RSA68342  Lepidium lasiocarpum F. W. Peirson 1916-04 679 Riverside Near Palm Springs. Comment
  RSA68694  Muilla maritima F. W. Peirson 1922-5-20 3046 Riverside Hemet Valley. (San Jacinto Mountains) 1402 Comment
  RSA69330A  Rhododendron occidentale var. californicum F. W. Peirson 843 Riverside Fruiting specimen from San Jacinto Mtns. Comment
  RSA69561  Mentzelia jonesii F. W. Peirson 1928-4-24 7909 Riverside Below Cottonwood Springs, Eagle Mountains. Northern Colorado Desert. Comment
  RSA69660  Juncus macrophyllus F. W. Peirson 1924-7-28 5011 Riverside Pine Flats Camp 1799 Comment
  RSA69992  Allionia incarnata F. W. Peirson 1922-12-28 5221 Riverside Andreas Canyon near Palm Springs Comment
  RSA70006  Tidestromia oblongifolia subsp. oblongifolia F. W. Peirson 1924-12-30 5416 Riverside Thousand-Palms Canyon, Colorado Desert 122 Comment
  RSA70095  Juncus bufonius var. occidentalis F. W. Peirson 1922-4-29 2928 Riverside South of Lake Elsinore. 381 Comment
  RSA70160  Dichelostemma capitatum subsp. pauciflorum F. W. Peirson 1922-4-9 2903 Riverside Andreas Canyon near Palm Springs, Colorado Desert, 335 Comment
  RSA70238  Allium peninsulare F. W. Peirson 1930-5-10 8773 Riverside St. Johns Grade. south of Hemet 610 Comment
  RSA70334  Asclepias californica F. W. Peirson 1922-4-29 4255 Riverside Leach Canyon. ( base of Santa Ana Mts., near Elsinore) 534 Comment
  RSA71017  Cressa truxillensis F. W. Peirson 1922-5-21 4254 Riverside near foot of Jack Rabbit Grade. (south of Moreno) 427 Comment
Read comments
Mar 20 2011
  RSA71928  Aliciella latifolia F. W. Peirson 1921-3-22 2385 Riverside Andreas Canyon, Palm Springs region Comment
  RSA72167  Epilobium ciliatum subsp. ciliatum F. W. Peirson 1924-7-28 5012 Riverside Pine Flats Camp 1799 Comment
  RSA73057  Leptosiphon lemmonii F. W. Peirson 1938-5-30 12414 Riverside Thomas Mountain, Hemet Valley. 1402 Comment
  RSA73679  Leptosiphon floribundus F. W. Peirson 1922-4-28 946 Riverside Leach Canyon Near Lake Elsinore. 549 Comment
  RSA74706  Phacelia rotundifolia F. W. Peirson 1919-4-13 4125 Riverside Alkali Canyon, eastward from Palm Canyon; Colorado Desert. Comment
  RSA74790  Phacelia campanularia F. W. Peirson 1926-2-22 6499 Riverside On talus slope east of bridge over Whitewater River, head of Coachella Valley Comment
  RSA74795  Phacelia pedicellata F. W. Peirson 1920-2-16 970 Riverside Palm Canyon Stream, Near foot of Alkali Canyon east of Palm Canyon, Riverside County. Comment
  RSA74932  Phacelia distans F. W. Peirson 1928-4-24 7903 Riverside Cottonwood Springs, northern Colorado Desert Comment
  RSA76968  Ziziphus parryi F. W. Peirson 1922-4-9 2870 Riverside Andreas Canyon, Palm Springs Region. 366 Comment
  RSA77059  Loeseliastrum schottii F. W. Peirson 1914-04 953 Riverside Whitewater at head of Coachella Valley. Comment
  RSA77076  Langloisia setosissima subsp. setosissima F. W. Peirson 1935-4-17 s.n. Riverside 30 miles north of Blythe. Comment
  RSA77414  Brandegea bigelovii F. W. Peirson 1921-3-23 2387 Riverside Deep Canyon Wash, 12 miles southeast of Palm Springs. 152 Comment
  RSA77438  Angelica tomentosa F. W. Peirson 1924-7-29 5024 Riverside Open Mountain slope on road from Banning to Idyllwild, San Jacinto Mountains. 1677 Comment
  RSA77816  Pectocarya peninsularis F. W. Peirson 1920-2-16 1013 Riverside Palm Canyon stream below the canyon, Palm Springs. region Comment
  RSA77888  Tiquilia palmeri F. W. Peirson 1930-3-29 8688 Riverside Colorado Desert. Painted Canyon, near Mecca. Comment
  RSA79895  Physalis crassifolia F. W. Peirson 1921-3-20 4485 Riverside Andreas Canyon, near Palm Springs 244 Comment
Read comments
Oct 18 2007
  RSA80216  Plagiobothrys leptocladus F. W. Peirson 1922-4-29 4273 Riverside Field S of Lake Elsinore 375 Comment
  RSA80394  Daucus pusillus F. W. Peirson 1921-3-22 2379 Riverside Murray Canyon near Palm Springs. 457 Comment
  RSA80634  Epilobium densiflorum F. W. Peirson 1924-7-29 5033 Riverside Banning to Idyllwild road, San Jacinto Mountains. 1570 Comment
  RSA80830  Pedicularis densiflora F. W. Peirson 1921-3-19 2741 Riverside 4 miles west of Beaumont, on road to Redlands. Comment
  RSA81010  Fouquieria splendens F. W. Peirson 1921-3-23 2391 Riverside Deep canyon wash, south of Coachella Valley Comment
  RSA82009  Justicia californica F. W. Peirson 1916-04 1172 Riverside abundant about mouth of Tahquitz Canyon, Palm Springs. Comment
  RSA85071  Crossosoma bigelovii F. W. Peirson 1920-2-15 1953 Riverside Small canyon north of Tahquitz Canyon, east base of San Jacinto Mtns. Comment
  RSA85074  Crossosoma bigelovii F. W. Peirson 1933-4-15 10653 Riverside Whitewater River E of Cabezon, 4.5 mi. up stream from Hwy. 701 Comment
  RSA85169  Ephedra californica F. W. Peirson 1925-4-17 6021 Riverside Cabazon, San Gorgonio Pass. Comment
Read comments
Mar 13 2011
  RSA85545  Cheilanthes viscida F. W. Peirson 1921-3-22 2371 Riverside Murray Canyon, south side in canyon 457 Comment
  RSA85825  Cupressus forbesii F. W. Peirson 1922-5-28 3058 Riverside Canyon floor in canyon east from Santa Ana River Canyon. at 400 ft. 121 Comment
Read comments
Feb 28 2013
  RSA85840  Marsilea vestita F. W. Peirson 1922-4-29 2937 Riverside mud flat south of Lake Elsinore Comment
  RSA86207  Notholaena californica subsp. leucophylla F. W. Peirson 1921-3-20 1503 Riverside Andreas Canyon, near Palm Springs. 243 Comment
  RSA86651  Purshia tridentata var. glandulosa F. W. Peirson 1933-4-13 10645 Riverside Between Deep Canyon and Idylwild. 1524 Comment
  RSA86861  Prunus fasciculata F. W. Peirson 1928-4-24 7915 Riverside Plateau land west of Cottonwood Springs, northeast of mecca. Comment
  RSA86985  Cercidium floridum F. W. Peirson 1921-4-13 sn Riverside Deep Canyon Wash, about 12 miles SE of Palm Springs. 152 Comment
  RSA86993  Prosopis glandulosa var. torreyana F. W. Peirson 1919-4-12 4429 Riverside Palm Canyon, near Palm springs. Comment
  RSA87000  Caesalpinia virgata F. W. Peirson 1922-4-11 4426 Riverside Deep Canyon Wash, south side of Coachella Valley 274 Comment
  RSA87018  Acacia greggii var. arizonica F. W. Peirson 1916-04 1996 Riverside Near Palm Springs. Comment
  RSA87096  Lupinus concinnus subsp. optatus F. W. Peirson 1938-5-30 s.n. Riverside Thomas Mountain, Hemet Valley. 1402 Comment
  RSA87149  Quercus palmeri F. W. Peirson 1922-5-20 3016 Riverside Upper end of Hemet Valley 1463 Comment
  RSA87193  Lupinus excubitus var. austromontanus F. W. Peirson 1938-5-30 12411 Riverside Thomas Mountain, Hemet Valley. 1402 Comment
  RSA90167  Astragalus lentiginosus var. coachellae F. W. Peirson 1920-12-29 585 Riverside Whitewater, at head of Coachella Valley. Comment
  RSA91284  Isocoma acradenia var. eremophila F. W. Peirson 1920-12-28 2335 Riverside Murray Canyon near Palm Springs Comment
  SBBG29172  Trixis californica var. californica F. W. Peirson 1920-2-16 Riverside Murray Cyn, near Palm Springs Comment
  SBBG98295  Baileya pauciradiata F. W. Peirson 1921-4-12 2775 Riverside Indian Wells Comment
  SD87599  Senecio mohavensis F. W. Peirson 1921-3-22 2378 Riverside Murray CaA'on near Palm Springs. 455 Comment
  SD87602  Astragalus palmeri F. W. Peirson 1921-3-23 4752 Riverside Santa Rosa Mountains, Deep Canyon 334 Comment
  SD87604  Astragalus palmeri F. W. Peirson 1921-3-21 4751 Riverside Gordon Trail, Palm Canyon to San Jacinto Mountains 1220 Comment
  SD87753  Myriopteris covillei Frank W. Peirson 1921-3-22 2331 Riverside Murray CaA'on Comment
  UC483079  Salix exigua Frank W. Peirson 1924-12-30 5410 Riverside 1000-Palm Canyon Colorado Desert, 1000-Palm Canyon 121 Comment
  UC501636  Triodanis biflora Frank W. Peirson 1926-5-2 6723 Riverside grade n Dripping Spring; n of Dripping Spring 426 Comment
  UC511829  Salvia vaseyi Frank W. Peirson 1933-4-13 10635 Riverside road from Deep Canyon to Idyllwild 487 Comment
  UC511880  Crossosoma bigelovii Frank W. Peirson 1933-4-15 10653 Riverside 4 1/2 mi above bridge; Whitewater River 701 Comment
  UC555405  Lotus rigidus Frank W. Peirson 1922-4-9 Riverside Andreas Canyon Comment
  UC672284  Xylorhiza cognata Frank W. Peirson 1927-4-12 7159 Riverside Painted Canyon Comment
  UC908751  Saltugilia australis Frank W. Peirson 1928-4-19 7848 Riverside hills n Elsinore; hills n of Elsinore 457 Comment
  UCR136623  Myosurus minimus subsp. apus F. W. Peirson 1922-4-29 2945 Riverside Elsinore Trough, Lake Elsinore, about mudflat south of lake 375 Comment
  UCR142729  Hornungia procumbens F. W. Peirson 1922-4-30 1896 Riverside Peninsular Range, Lancaster Valley, road from Hemet to Temecula 518 Comment
  UCR80284  Alopecurus saccatus F. W. Peirson, P. A. Munz 1922-5-19 s.n. Riverside Menifee Valley 457 Comment
  POM9932  Cheilanthes viscida F. W. Peirson 1921-3-22 2371 Riverside Murray Canyon, south side in canyon 457 Comment
  POM9934  Notholaena californica subsp. californica F. W. Peirson 1920-2-15 s.n. Riverside Palm Springs, Tahquitz Camp. Comment
  RSA0018750  Nicotiana obtusifolia F. W. Peirson 1920-2-15 s.n. Riverside Murray Canyon near Palm Springs Comment
  RSA0018759  Nicotiana obtusifolia F. W. Peirson 1917-4-1 1089 Riverside Andreas Canyon near Palm Springs. Comment
  RSA0022930  Eschscholzia androuxii F. W. Peirson 1928-4-23 7888 Riverside 2.5 miles below cottonwood Springs. Comment
  RSA0022975  Eschscholzia androuxii F. W. Peirson 1927-4-11 7153 Riverside 0.5 mile below Whitewater Bridge, head of Coachella Valley. Comment
  RSA0066506  Orobanche californica subsp. feudgei Frank W. Peirson 1938-5-30 s.n. Riverside Thomas Mountain, Hemet Valley. Slopes south of the Shell Gas station. 1402 Comment
  RSA0098430  Spergularia macrotheca var. leucantha F. W. Peirson 1922-4-30 2958 Riverside 1 mile west of Lakeview, San Jacinto Valley. 427 Comment
  RSA0098506  Spergularia marina var. tenuis F. W. Peirson 1922-4-29 1867 Riverside South of Lake Elsinore. 374 Comment
  RSA65838  Sisymbrium altissimum F. W. Peirson 1922-4-22 5331 Riverside Field S of Lake Elsinore. Comment
  RSA90156  Astragalus didymocarpus F. W. Peirson 1914-1 576 Riverside Whitewater, east of Cabezon Comment
  RSA90388  Lotus strigosus var. tomentellus F. W. Peirson 1921-4-13 4085 Riverside Deep Canyon, about 12 miles southeast of Palm Springs. 274 Comment
  RSA90638  Astragalus palmeri F. W. Peirson 1921-3-23 4752 Riverside Deep Canyon, SE of Palm Springs. 335 Comment
  RSA91207  Lupinus excubitus var. hallii F. W. Peirson 1922-4-28 2947 Riverside Leach Canyon Near Lake Elsinore. 549 Comment
  RSA91359  Amorpha fruticosa F. W. Peirson 1919-4-12 702 Riverside Palm Canyon, near Palm springs. Comment
  RSA91406  Trifolium albopurpureum F. W. Peirson 1922-4-29 4069 Riverside South of Temecula on Temecula River, Riverside Co., California 427 Comment
  RSA91429  Marina parryi F. W. Peirson 1921-3-23 2383 Riverside Deep Canyon Wash, 12 miles southeast of Palm Spring 229 Comment
  RSA92090  Eleocharis geniculata F. W. Peirson 1921-3-20 2923 Riverside Palm Canyon, east base of San Jacinto Mountains 305 Comment
Read comments
Oct 1 2011
  RSA92883  Populus fremontii F. W. Peirson 1928-3-10 7699 Riverside along irrigation ditch, Snow Creek Auto Camp at Whitewater, head of Coachella Valley. Comment
  RSA93281  Pentachaeta aurea F. W. Peirson 1922-5-19 3037 Riverside San Jacinto River 1143 Comment
  RSA93327  Xylorhiza cognata F. W. Peirson 1927-4-12 7159 Riverside Painted Canyon, near Mecca Comment
  RSA93686  Ambrosia psilostachya F. W. Peirson 1920-12-29 5276 Riverside Murray Canyon near Palm Springs. Comment
  RSA93715  Brickellia arguta F. W. Peirson 1919-4-13 1214 Riverside Along the Tahquitz creek, East of Palm Springs, Riverside. Comment
  RSA93730  Acamptopappus sphaerocephalus var. sphaerocephalus F. W. Peirson 1927-4-11 7154 Riverside 0.5 mile below Whitewater Bridge, head of Coachella Valley. Comment
  RSA93897  Rhus trilobata var. pilosissima F. W. Peirson 1928-3-24 7726 Riverside 1-2 miles north of Dripping Springs, grade on Temecula River, sw. Riverside County. 426 Comment
  RSA93957  Hymenoclea salsola F. W. Peirson 1914-04 2494 Riverside Whitewater at head of Coachella Valley. Comment
  RSA94533  Artemisia californica F. W. Peirson 1920-12-29 1456 Riverside 1.5 miles east of whitewater, head of Coachella Valley. 305 Comment
  RSA94830  Trixis californica F. W. Peirson 1914-4-1 s.n. Riverside Whitewater at head of Coachella Valley Comment
  RSA95060  Rafinesquia neomexicana F. W. Peirson 1914-04 1476 Riverside Whitewater at head of Coachella Valley. Comment
Read comments
Apr 30 2011
  RSA95377  Sidalcea malviflora subsp. sparsifolia F. W. Peirson 1914-04 2058 Riverside Beaumont, San Gorgonio Pass. Comment
  RSA97436  Lomatium vaginatum F. W. Peirson 1922-4-29 2932 Riverside South of Lake Elsinore. 381 Comment
Read comments
Dec 8 2013
  CAS-BOT-BC100839  Chrysothamnus viscidiflorus subsp. viscidiflorus Frank W. Peirson 1931-10-10 s.n. San Bernardino Road to Fish Hatchery south of Baldwin Lake, San Bernardino Mts. 2194 Comment
  CAS-BOT-BC10879  Erythranthe suksdorfii Frank Warrington Peirson 1922-6-22 4722 San Bernardino South Fork of Santa Ana River Meadows, San Bernardino Mountains 2346 Comment
  CAS-BOT-BC111025  Scirpus microcarpus Frank Warrington Peirson 1922-6-20 3097 San Bernardino in water along road, 4 mi E of San Bernardino Comment
  CAS-BOT-BC123790  Gilia latiflora subsp. elongata Frank Warrington Peirson 1922-5-13 2985 San Bernardino 28 miles N of Barstow, vicinity Seabergs Well Comment
  CAS-BOT-BC125335  Salix lasiandra var. lasiandra Frank W. Peirson 1932-5-30 9971 San Bernardino Green Valley, San Bernardino Mts. 2103 Comment
  CAS-BOT-BC134089  Brickellia microphylla var. microphylla Frank W. Peirson 1920-9-15 2279 San Bernardino Lytle Creek, San Gabriel Mts. 1828 Comment
  CAS-BOT-BC141852  Potentilla anserina F. W. Peirson 1943-5-30 13552 San Bernardino Baldwin Lake, San Bernardino Mts., southern California Comment
  CAS-BOT-BC142720  Phacelia exilis Mabel B. Peirson 1932-5-29 9969 San Bernardino Slopes south of Baldwin Lake, San Bernardino Mts. open plateau region along Fish Hatchery Road 2103 Comment
  CAS-BOT-BC143819  Cercocarpus ledifolius var. ledifolius F. W. Peirson 1905-7-14 79 San Bernardino Ontario Ridge, Mt. Baldy, San Gabriel Mts. [entered as LA Co.; Ontario Ridge is in SanBrndo Co.] 2590 Comment
  CAS-BOT-BC158155  Prunus emarginata F. W. Peirson; L. Constance 1941-6-24 s.n. San Bernardino Summit of ridge above Big Pines, north side of San Gabriel Mts., near line of Los Angeles and San Bernardino County Comment
  CAS-BOT-BC17375  Arabis pycnocarpa var. pycnocarpa Frank W. Peirson 1920-8-25 2355 San Bernardino San Bernardino Mountains. South Fork Santa Ana Meadow. 2438 Comment
  CAS-BOT-BC19746  Carex abrupta Frank W. Peirson 1923-8-23 3973 San Bernardino San Bernardino Mountains. High Creek. 2773 Comment
  CAS-BOT-BC217404  Gentiana fremontii Frank W. Peirson 1909-8-10 869 San Bernardino South Fork Santa Ana, San Bernardino Mountains 2438 Comment
  CAS-BOT-BC241664  Eriogonum baileyi var. baileyi Frank W. Peirson 1924-8-31 5100 San Bernardino 1 mile north of Cajon Pass, Mojave Desert 1219 Comment
  CAS-BOT-BC243018  Poa secunda subsp. secunda Frank W. Peirson 1924-5-15 4539 San Bernardino N end of Baldwin Lake, San Bernardino Mountains 2057 Comment
  CAS-BOT-BC248058  Chorizanthe xanti var. leucotheca Frank W. Peirson 1920-5-18 1772 San Bernardino Lytle Creek, San Gabriel Mts. 1066 Comment
  CAS-BOT-BC278582  Festuca saximontana F. W. Peirson 1922-8-23 3266 San Bernardino Summit San Gorgonio, San Bernardino Mts. 3490 Comment
  CAS-BOT-BC293570  Erigeron aphanactis var. congestus Frank W. Peirson 1922-6-23 3102 San Bernardino Summit of Sugarloaf, San Bernardino Mts. 2987 Comment
  CAS-BOT-BC334341  Packera bernardina Frank W. Peirson 1933-6-24 10671 San Bernardino S. shore of Baldwin Lake, San Bernardino Mts. 2057 Comment
  CAS-BOT-BC376675  Syntrichopappus fremontii F. W. Peirson 1927-5-8 7290 San Bernardino 10 miles north of Barstow Comment
  CAS-BOT-BC39684  Cusickiella douglasii Frank W. Peirson 1924-5-15 4589 San Bernardino San Bernardino Mountains. Baldwin Lake. 2042 Comment
  CAS-BOT-BC79943  Antennaria microphylla Frank W. Peirson 1922-6-22 4231 San Bernardino South Fork Santa Ana River. San Bernardino Mts. 2346 Comment
  JEPS10613  Hymenothrix dissecta Frank W. Peirson 1914-2 3282 San Bernardino South Fork of the Santa Ana River San Bernardino Mountains, South Fork of the Santa Ana River 2621 Comment
  JEPS15754  Conium maculatum Frank W. Peirson 1920-5-18 2115 San Bernardino San Gabriel Mountains, Lytle Creek Lytle Creek; San Gabriel Mountains, Lytle Creek 1066 Comment
  JEPS16107  Lomatium dissectum var. multifidum Frank W. Peirson 1920-5-19 2153 San Bernardino San Gabriel Mts., Coldwater Canyon 1676 Comment
  JEPS1804  Nemophila menziesii var. integrifolia Frank W. Peirson 1919-4-16 364 San Bernardino Cajon Pass , Cajon Pass (San Gabriel Mountains) 685 Comment
  JEPS22361  Erigeron parishii Frank W. Peirson 1926-5-29 6736 San Bernardino Cushenberry Grade; roadside, near type locality 1295 Comment
  JEPS31388  Gentiana fremontii Frank W. Peirson 1922-6-22 3136 San Bernardino San Bernardino Mts, South Fork Santa Ana River South Fork Santa Ana River; San Bernardino Mts, South Fork Santa Ana River 2377 Comment
  JEPS36576  Hieracium albiflorum F. W. Peirson 1918-7-7 San Bernardino 15 mi from Upland (towards Mt. San Antonio); Icehouse Canyon 1981 Comment
  JEPS36929  Artemisia tridentata subsp. tridentata Frank W. Peirson 1920-9-15 1455 San Bernardino Lytle Creek San Gabriel Mts., Lytle Creek 1981 Comment
  JEPS39250  Epilobium ciliatum subsp. glandulosum Frank W. Peirson 1920-9-14 2304 San Bernardino Coldwater Cienega San Gabriel Mts. (tributary of Lytle Creek) 2133 Comment
  JEPS41455  Erigeron breweri var. breweri F. W. Peirson 1922-8-22 3291 San Bernardino near stream; San Bernardino Mountains, Santa Ana River,South Fork; data in packet includes This looks to me like 3204... 2560 Comment
  JEPS43177  Claytonia parviflora subsp. viridis F. W. Peirson 1920-5-19 2148 San Bernardino Lytle Creek tributary Coldwater Canyon (Coldwater Canyon) 1676 Comment
  JEPS48037  Sedum niveum Frank W. Peirson 1920-8-26 2298 San Bernardino San Bernardino Mts., crest e of Foresee 1676 Comment
Read comments
Jan 2 2012
  JEPS48043  Sedum niveum Frank W. Peirson 1922-8-24 3293 San Bernardino rocky ledge above Dollar Lake; San Bernardino Mountains, Dollar Lake 2834 Comment
  JEPS48057  Sedum niveum Frank W. Peirson 1924-7-14 4951 San Bernardino Lost Creek , Lost Creek (San Bernardino Mountains) 2438 Comment
  JEPS50881  Silene verecunda Frank W. Peirson 1920-9-15 2284 San Bernardino Baldy n slope San Gabriel Mountains, Baldy n slope 2819 Comment
  JEPS51152  Stellaria calycantha Frank W. Peirson 1923-8-23 4158 San Bernardino High Creek; San Bernardino Mts. Comment
  JEPS52508  Calyptridium umbellatum Frank W. Peirson 1918-7-7 34 San Bernardino Ontario Ridge 2621 Comment
  JEPS55447  Lotus grandiflorus var. grandiflorus Frank W. Peirson 1918-6-18 102 San Bernardino Summit Cajon Pass Comment
  JEPS56873  Eriogonum heermannii var. argense F. W. Peirson 1922-5-13 2963 San Bernardino Pilot Knob Mohave Desert 1524 Comment
  JEPS57776  Chorizanthe watsonii F. W. Peirson 1922-6-25 3131 San Bernardino Foxesee (Forsee) Creek San Bernardino Mountains, Foxesee (Forsee) Creek 1828 Comment
  JEPS59097  Sarcodes sanguinea Frank W. Peirson 1919-6-4 460 San Bernardino San Gabriel Mts., Icehouse Canyon 2133 Comment
  JEPS63300  Teucrium glandulosum Frank W. Peirson 1935-4-18 11504 San Bernardino n part Whipple Mts. Comment
  JEPS64494  Malaxis monophyllos subsp. brachypoda Frank W. Peirson 1922-8-25 2271 San Bernardino South Fork Santa Ana River San Bernardino Mountains, South Fork Santa Ana River 2438 Comment
  JEPS64551  Populus fremontii subsp. fremontii Frank W. Peirson 1921-7-17 2513 San Bernardino Lytle Creek; San Gabriel Mountains, Lytle Creek 1981 Comment
  JEPS7542  Penstemon X parishii F. W. Peirson 1921-5-30 2429 San Bernardino road to Lone Pine Canyon SAn Gabriel Mountains, road to Lone Pine Canyon (San Gabriel Mountains) 990 Comment
  JEPS88975  Dudleya abramsii subsp. affinis Frank W. Peirson 1933-6-24 8972 San Bernardino ridge s summit of Johnson Grade; San Bernardino Mtns 2133 Comment
  PASA1284  Stellaria longipes Frank W. Peirson 1922-6-22 San Bernardino South Fork Santa Ana River, San Bernardino Mts. 2377 Comment
  PASA1724  Erigeron divergens Frank W. Peirson 1930-7-1 San Bernardino Southwest shore of Baldwin Lake, San Bernardino Mts. 2042 Comment
  PASA1744  Sidalcea hickmanii var. parishii Frank W. Peirson 1922-6-24 San Bernardino Foxsee Creek, San Bernardino Mts. 1828 Comment
  PASA2205  Dyssodia cooperi Frank W. Peirson 1922-5-12 San Bernardino 3 miles south of Barstow on the Victoryville Road Comment
Read comments
Oct 23 2014
  PASA2286  Gnaphalium palustre Frank W. Peirson 1930-7-7 San Bernardino Holcomb Valley, San Bernardino Mts. 2255 Comment
  PASA2374  Acer negundo var. californicum Frank W. Peirson 1924-7-16 San Bernardino Oak Glen, south base San Bernardino Mts. 1462 Comment
  PASA2639  Ranunculus eschscholtzii var. oxynotus Frank W. Peirson 1920-8-22 1877 San Bernardino Foxesee (or Forsee) Creek, San Bernadino Mtns. 2666 Comment
  PASA2709  Astragalus acutirostris Frank W. Peirson 1930-5-31 8925 San Bernardino Summit of grade above Warrens Well Comment
  PASA800  Gilia latiflora Frank W. Peirson 1926-4-28 San Bernardino 5 miles north of Box S Spring, Mohave Desert Comment
  PASA880  Penstemon labrosus Frank W. Peirson 1923-8-31 San Bernardino Blue Ridge, Swartout Valley Region 2590 Comment
  PASA931  Hieracium horridum Frank W. Peirson 1930-7-7 San Bernardino Arrastre Flat, San Bernardino Mts. 2255 Comment
  POM13534  Calyptridium parryi F. W. Peirson 1922-6-21 s.n. San Bernardino Cienega Seca Creek. 2134 Comment
  POM13540  Veronica serpyllifolia var. humifusa F. W. Peirson 1922-6-22 s.n. San Bernardino South Fork of Santa Ana. San Bernardino Mtns. 2348 Comment
  POM13542  Sidalcea hickmanii subsp. parishii F. W. Peirson 1922-6-24 4697 San Bernardino Foxesee Creek. 1829 Comment
  POM13543  Silene menziesii subsp. dorrii F. W. Peirson 1922-6-24 s.n. San Bernardino Santa Ana River, 1/4 mile above the south fork 1951 Comment
  POM13545  Arenaria lanuginosa subsp. saxosa F. W. Peirson 1922-6-24 s.n. San Bernardino South Fork of the Santa Ana River 1921 Comment
  POM162732  Helianthus gracilentus F. W. Peirson 1929-8-23 8581 San Bernardino City Creek Grade below Fredalba 1524 Comment
  POM349507  Trifolium monanthum subsp. grantianum F. W. Peirson 1924-7-5 4070 San Bernardino Bluff Lake. San Bernardino Mts. 2287 Comment
  POM47644  Astragalus albens F. W. Peirson 1924-5-15 4570 San Bernardino Cactus Flat, San Bernardino Mts. level open place on hills. 1768 Comment
  RSA0117291  Collinsia parviflora F. W. Peirson 1926-5-31 6755 San Bernardino Bluff Lake. 2287 Comment
  RSA13544  Cryptantha cinerea var. abortiva F. W. Peirson 1922-6-21 3103 San Bernardino Big Meadow, upper Santa Ana River, San Bernardino Mountains 2165 Comment
  RSA399949  Myosurus aristatus F. W. Peirson 1926-5-31 14990 San Bernardino Bluff Lake 2287 Comment
  RSA420563  Eriogonum umbellatum var. munzii F. W. Peirson 1922-7-7 3177 San Bernardino San Gabriel Mountains: Sheep Creek 1921 Comment
  RSA499251  Ivesia saxosa F. W. Peirson 1924-9-1 4605 San Bernardino Cactus Flat. 1799 Comment
  RSA588346  Epilobium canum subsp. latifolium F. W. Peirson 1929-9-2 5174 San Bernardino San Bernardino Mountains, Fish Camp. 2058 Comment
  RSA64573  Eriogonum pusillum F. W. Peirson 1916-7-8 1736 San Bernardino Box S Spring. 1082 Comment
  RSA64699  Eriogonum thomasii F. W. Peirson 1916-7-9 s.n. San Bernardino Mojave Desert, near Victorville. Comment
  RSA64808  Chenopodium berlandieri var. zschackei F. W. Peirson 1916-7-8 1825 San Bernardino Box S Spring. 1082 Comment
  RSA65038  Silene parishii F. W. Peirson 1906-8-17 609 San Bernardino South Fork of Santa Ana River. 2439 Comment
  RSA65062  Silene verecunda subsp. platyota F. W. Peirson 1922-8-25 3270 San Bernardino Along base of E slope, S Fork of Santa Ana River, San Bernardino Mts 2500 Comment
  RSA65065  Silene krantzii F. W. Peirson 1923-4-24 615 San Bernardino Summit od San Gorgonio Peak. 3476 Comment
  RSA65481  Arenaria macradenia var. macradenia F. W. Peirson 1930-7-2 8965 San Bernardino Ridge south from summit of Johnsons Grade, east end of San Bernardino Mountains 2104 Comment
  RSA65494  Arenaria lanuginosa subsp. saxosa F. W. Peirson 1923-8-22 3975 San Bernardino Vivian Creek, San Bernardino Mountains 2195 Comment
  RSA65525  Sagina saginoides F. W. Peirson 1920-8-25 2819 San Bernardino South Fork of Santa Ana River 2438 Comment
  RSA65661  Claytonia parviflora subsp. viridis F. W. Peirson 1920-5-19 2148 San Bernardino Coldwater Canyon, fork of Lytle Creek, San Gabriel Mountains 1677 Comment
  RSA65687  Lewisia nevadensis F. W. Peirson 1926-5-31 6754 San Bernardino Bluff Lake 2287 Comment
  RSA65722  Claytonia perfoliata subsp. intermontana F. W. Peirson 1922-5-13 3008 San Bernardino North slope of Pilot Knob, northwestern Mojave Desert. 1296 Comment
  RSA65723  Claytonia rubra subsp. rubra F. W. Peirson 1951-1 s.n. San Bernardino Bear Valley. Comment
  RSA65758  Stellaria media F. W. Peirson 1922-6-24 4291 San Bernardino Santa Ana River 1936 Comment
  RSA65771  Echinocereus engelmannii var. engelmannii F. W. Peirson 1922-6-23 3146 San Bernardino Creek leading up to a divide over Holocomb Creek, San Bernardino Mountains 2439 Comment
  RSA65789  Cleomella obtusifolia F. W. Peirson 1924-5-14 4576 San Bernardino 21 miles east of Victorville. Comment
  RSA65818  Descurainia pinnata subsp. menziesii F. W. Peirson 1933-6-25 10673 San Bernardino Low open valley east of Fish Hatchery, east end of Bear Valley 2134 Comment
  RSA65851  Eriogonum microtheca var. johnstonii F. W. Peirson 1922-7-19 3199 San Bernardino Cucamonga Peak, San Gabriel Mountains 2591 Comment
  RSA65862  Polygonum sawatchense subsp. sawatchense F. W. Peirson 1922-8-22 4216 San Bernardino Meadows of South Fork of Santa Ana River, San Bernardino Mountains. 2561 Comment
  RSA65896  Centrostegia thurberi var. thurberi F. W. Peirson 1921-5-29 5344 San Bernardino Mojave River. 884 Comment
  RSA65939  Polygonum ramosissimum F. W. Peirson 1924-9-1 5161 San Bernardino North side of Baldwin Lake, San Bernardino Mountains. 2043 Comment
  RSA65979  Eriogonum evanidum F. W. Peirson 1929-8-23 8587 San Bernardino Southwest slopes of Baldwin Lake, San Bernardino Mts. 2073 Comment
  RSA65981  Polygonum amphibium var. stipulaceum F. W. Peirson 1906-8-18 1789 San Bernardino Dry Lake. 2774 Comment
  RSA66072  Barbarea orthoceras F. W. Peirson 1922-6-24 3144 San Bernardino South Fork of the Santa Ana River 1921 Comment
  RSA66198  Arabis pulchra F. W. Peirson 1924-5-15 4568 San Bernardino Cactus Flat 1829 Comment
  RSA66339  Eriogonum davidsonii F. W. Peirson 1930-7-5 9003 San Bernardino Quarry northwest of Baldwin Lake, San Bernardino Mountains. 2073 Comment
  RSA66510  Arabis platysperma F. W. Peirson 1906-8-15 656 San Bernardino Lookout Mt., Bluff Lake, San Bernardino Mountains. Comment
  RSA66521  Arabis holboellii var. pinetorum F. W. Peirson 1930-7-8 s.n. San Bernardino Fish Hatchery creek [possibly Green Canyon Creek], N side of Sugarloaf, San Bernardino Mts 2439 Comment
Read comments
Aug 15 2011
  RSA66804  Streptanthella longirostris F. W. Peirson 1917-5-13 1914 San Bernardino West of Victorville, on Palmdale road; Mojave Desert. Comment
  RSA66810  Streptanthella longirostris F. W. Peirson 1924-3-25 9838 San Bernardino 18 miles from Barstow on Victorville road 732 Comment
  RSA66835  Thelypodium integrifolium subsp. affine F. W. Peirson 1924-8-31 1916 San Bernardino South of Victorville. Comment
  RSA67357  Lepidium flavum F. W. Peirson 1921-5-29 2813 San Bernardino Mojave River 869 Comment
  RSA69480  Luzula comosa F. W. Peirson 1920-8-25 2270 San Bernardino South Fork of Santa Ana River, San Bernardino Mountains. 2439 Comment
  RSA69686  Mentzelia obscura F. W. Peirson 1932-3-24 9819 San Bernardino Baker, along SW base of rock hill 280 Comment
  RSA69949  Grayia spinosa F. W. Peirson 1922-5-13 2998 San Bernardino Granite Wells, Mojave Desert. Comment
  RSA69985  Mirabilis pumila F. W. Peirson 1920-8-26 2257 San Bernardino Santa Ana River, San Bernardino Mountains. 1372 Comment
  RSA70203  Allium campanulatum F. W. Peirson 1930-7-2 8970 San Bernardino Ridge south of summit of Johnson Grade, east end of San Bernardino Mountains. 2134 Comment
  RSA70320  Asclepias erosa F. W. Peirson 1930-5-31 8923 San Bernardino dandy desert in open scrub for several miles; 3 mi. south of Old Woman Spring. Comment
  RSA70325  Asclepias eriocarpa F. W. Peirson 1924-9-2 5194 San Bernardino roadside a few roads up the road toward Greer Valley; city Creek Road. 1799 Comment
  RSA70401  Chamaesyce serpillifolia F. W. Peirson 1923-8-24 3992 San Bernardino Vivian Creek 2439 Comment
  RSA70506  Geranium richardsonii F. W. Peirson 1923-8-23 3982 San Bernardino High Creek, San Bernardino Mountains. 2774 Comment
  RSA70529  Calochortus invenustus Frank W. Peirson 1930-7-1 8964 San Bernardino Baldwin Lake 2043 Comment
  RSA70582  Sisyrinchium bellum Frank W. Peirson 1922-6-23 4103 San Bernardino Holcomb Creek, San Bernardino Mountains. 2439 Comment
  RSA70583  Sisyrinchium bellum Frank W. Peirson 1918-7-8 11 San Bernardino San Antonio Canyon, Los Angeles-San Bernardino County Line 1829 Comment
  RSA70592  Iris missouriensis Frank W. Peirson 1926-5-30 6743 San Bernardino North side of Baldwin Lake. San Bernardino Mountains. Alt. 6700 ft. 2043 Comment
  RSA70607  Iris hartwegii subsp. australis Frank W. Peirson 1916-7-6 1692 San Bernardino Bear Lake region [Big Bear Lake], San Bernardino Mountains. Comment
  RSA71866  Allophyllum violaceum F. W. Peirson 1933-10-15 10926 San Bernardino Dry unused roadway on southwest slope of Baldwin Lake. 2058 Comment
  RSA71997  Phlox austromontana F. W. Peirson 1924-5-15 4565 San Bernardino Cactus Flat, San Bernardino Mts. level open place on hills. 1768 Comment
  RSA72001  Phlox austromontana F. W. Peirson 1930-4-29 8757 San Bernardino 1 mile west of the Mohave River on the Hesperia Road. 854 Comment
  RSA72032  Polemonium occidentale F. W. Peirson 1922-8-25 3280 San Bernardino South fork of the Santa Ana River. 2530 Comment
  RSA72181  Epilobium glaberrimum subsp. glaberrimum F. W. Peirson 1920-9-14 2303 San Bernardino Coldwater Cienega, Lytle Creek. 2134 Comment
  RSA72256  Camissonia claviformis subsp. claviformis F. W. Peirson 1932-3-25 9835 San Bernardino North of Yermo. 610 Comment
  RSA73029  Leptosiphon breviculus F. W. Peirson 1928-9-5 7082 San Bernardino Along shores of Arrowhead Lake. 1524 Comment
  RSA74506  Phacelia exilis F. W. Peirson 1932-5-29 9969 San Bernardino Along road to Fish Hatchery, south of Baldwin Lake 2104 Comment
  RSA75368  Camissonia brevipes subsp. brevipes F. W. Peirson 1922-5-12 3015 San Bernardino Mojave Desert. 10 miles north of Barstow. Comment
  RSA75372  Camissonia boothii subsp. boothii F. W. Peirson 1916-7-9 792 San Bernardino Mojave Desert, near Victorville. Comment
  RSA75400  Camissonia boothii subsp. desertorum F. W. Peirson 1921-5-30 2580 San Bernardino Mojave Desert, Hesperia Comment
  RSA75881  Nemophila menziesii var. integrifolia F. W. Peirson 1924-5-16 4602 San Bernardino City Creek Road, Fredalba, San Bernardino Mts. 1524 Comment
  RSA75996  Eucrypta micrantha F. W. Peirson 1935-4-18 s.n. San Bernardino Copper Basin Creek, Whipple Mountains, eastern Colorado Desert. Comment
  RSA77036  Malacothamnus orbiculatus F. W. Peirson 1929-9-11 8591 San Bernardino Bear Valley Boulevard near Peter Pan Woodland Club, Bear Valley, San Bernardino Mts. 2073 Comment
  RSA77233  Eriodictyon trichocalyx var. trichocalyx F. W. Peirson 1919-6-4 989 San Bernardino San Antonio Canyon. 1448 Comment
  RSA77420  Petalonyx thurberi F. W. Peirson 1916-6-8 2077 San Bernardino Cushenberry Grade, North base of San Bernardino Mts. Comment
  RSA77422  Petalonyx thurberi F. W. Peirson 1923-9-1 4452 San Bernardino In one of valleys near Blvd, on road E of Phelan, Mojave Desert, San Bernardino County Comment
  RSA77784  Viola adunca F. W. Peirson 1916-7-4 746 San Bernardino Grass Valley. Comment
  RSA77794  Lappula occidentalis var. occidentalis F. W. Peirson 1924-5-15 4603 San Bernardino Wood on N side of East end of Bear Lake. 2043 Comment
  RSA77847  Callitriche heterophylla F. W. Peirson 1924-9-1 5172 San Bernardino Arrastre Flat, San Bernardino Mts. Comment
  RSA79461  Collinsia torreyi var. wrightii F. W. Peirson 1919-6-4 454 San Bernardino Icehouse Canyon Divide, San Gabriel Mountains. 2409 Comment
  RSA79901  Physalis crassifolia F. W. Peirson 1928-4-1 7757 San Bernardino 19 mi. east of Barstow on rod to Baker. Comment
  RSA80010  Cryptantha micrantha var. lepida F. W. Peirson 1919-4-16 370 San Bernardino South slope of Cajon Pass. 686 Comment
  RSA80041  Veronica scutellata F. W. Peirson 1906-8-15 s.n. San Bernardino Bluff Lake, San Bernardino Mountains. 2287 Comment
  RSA80127  Mimulus bigelovii var. bigelovii F. W. Peirson 1935-4-18 11491 San Bernardino Copper Basin Creek, Whipple Mts., Comment
  RSA80194  Penstemon caesius F. W. Peirson 1922-6-23 4306 San Bernardino East of summit of Sugarloaf, San Bernardino Mtns. 2927 Comment
  RSA80236  Orthocarpus purpurascens var. ornatus F. W. Peirson 1930-5-31 8920 San Bernardino Road from Lovejoy Buttes to Adelanto, southwestern Mojave Desert. ca. 20 mi. west of Victorville. Comment
  RSA80259  Castilleja lasiorhyncha F. W. Peirson 1906-8-15 1166 San Bernardino Bluff Lake, San Bernardino Mountains. 2256 Comment
  RSA80276  Castilleja lasiorhyncha F. W. Peirson 1930-7-7 9021 San Bernardino Arrastre Flat 2287 Comment
  RSA80381  Solanum umbelliferum F. W. Peirson 1929-10-11 8598 San Bernardino City Creek Rd., 2 mi west of Bear Lake Dam. 2134 Comment
  RSA80761  Cryptantha nevadensis F. W. Peirson 1926-4-27 6680 San Bernardino 14 miles E of victorville 915 Comment
  RSA82078B  Orobanche fasciculata F. W. Peirson 1909-1 s.n. San Bernardino Dry Lake. Comment
  RSA82111  Utricularia vulgaris subsp. macrorhiza F. W. Peirson 1928-9-5 5113 San Bernardino Victorville Comment
  RSA82199  Trichostema micranthum F. W. Peirson 1924-9-1 5173 San Bernardino Holcomb Valley 2256 Comment
  RSA82240  Castilleja angustifolia F. W. Peirson 1930-7-2 8968 San Bernardino Ridge at summit of Johnson's Grade, east of Baldwin Lake. 2104 Comment
  RSA83417  Monardella macrantha subsp. macrantha F. W. Peirson 1933-7-12 10704 San Bernardino San Bernardino Mountains: City Creek Road. 1372 Comment
  RSA84281  Ranunculus alismifolius var. alismellus F. W. Peirson 1924-7-5 4900 San Bernardino Bluff Lake, San Bernardino Mountains. 2287 Comment
  RSA84284  Equisetum hyemale var. affine F. W. Peirson 1922-6-22 3112 San Bernardino South Fork of Santa Ana River, San Bernardino Mountains 2438 Comment
  RSA84597  Heuchera abramsii F. W. Peirson 1920-9-15 2659 San Bernardino Summit of peak north of Mount San Antonio 2896 Comment
  RSA85020  Polypodium hesperium F. W. Peirson 1923-8-22 3984 San Bernardino Vivian Creek, San Bernardino Mountains 2195 Comment
  RSA85025  Polystichum scopulinum F. W. Peirson 1924-7-5 4888 San Bernardino Bluff Lake, San Bernardino Mountains. 2287 Comment
  RSA85177  Ephedra fasciculata F. W. Peirson 1935-4-18 11498 San Bernardino Northern part of Whipple Mountains, road going down into Copper Basin 427 Comment
  RSA85209  Horkelia wilderae F. W. Peirson 1922-6-25 4277 San Bernardino Barton Flats. Comment
  RSA85237  Horkelia rydbergii F. W. Peirson 1922-8-25 3286 San Bernardino South Fork of Santa Ana River 2378 Comment
  RSA85700  Potentilla gracilis var. elmeri F. W. Peirson 1906-8-17 1974 San Bernardino South Fork of Santa Ana River. 2439 Comment
  RSA85702  Potentilla gracilis var. elmeri F. W. Peirson 1930-7-2 8975 San Bernardino North side of Baldwin Lake. 2043 Comment
  RSA85796  Ivesia argyrocoma F. W. Peirson 1930-7-7 9019 San Bernardino Arrastre Flat 2287 Comment
Read comments
Apr 5 2010
  RSA86191  Cystopteris fragilis F. W. Peirson 1922-6-21 s.n. San Bernardino South fork of Santa Ana River, San Bernardino Mountains 1936 Comment
  RSA86294  Potentilla wheeleri F. W. Peirson 1924-5-15 4606 San Bernardino Wood on N side of East end of Bear Lake. 2043 Comment
  RSA86663  Coleogyne ramosissima F. W. Peirson 1924-5-14 4561 San Bernardino Box S Springs in Cushenberry [Cushenbury] Springs Region, north base of San Bernardino Mountains. 1082 Comment
  RSA86678  Cercocarpus betuloides F. W. Peirson 1921-3-19 2807 San Bernardino San Antonio Wash east of Claremont. 457 Comment
  RSA86712  Leucopoa kingii F. W. Peirson 1930-7-8 9038 San Bernardino Fish Hatchery creek [possibly Green Canyon Creek], north slope of Sugarloaf Peak, San Bernardino Mts. 2515 Comment
Read comments
Aug 15 2011
  RSA86713  Leucopoa kingii F. W. Peirson 1924-7-5 4922 San Bernardino Gold Mt. near Baldwin Lake. 2210 Comment
  RSA86852  Prunus emarginata F. W. Peirson 1920-5-19 2152 San Bernardino Coldwater Canyon, a fork of Lytle Creek, eastern San Gabriel Mts 1799 Comment
  RSA87065  Imperata brevifolia F. W. Peirson 1924-9-2 5201 San Bernardino Arrowhead Hot Springs. 579 Comment
  RSA87326  Muhlenbergia asperifolia F. W. Peirson 1924-8-31 5119 San Bernardino South of Victorville. 793 Comment
  RSA87456  Elymus trachycaulus subsp. subsecundus F. W. Peirson 1922-7-6 4335 San Bernardino Rangers Cabin, Swartout Valley, north side of San Gabriel Mountains. 1799 Comment
  RSA88837  Carex phaeocephala F. W. Peirson 1920-9-15 2290 San Bernardino Summit of peak north of Mount San Antonio 2896 Comment
  RSA90179  Astragalus bicristatus F. W. Peirson 1924-5-16 4588 San Bernardino North side of Bear Lake, San Bernardino Mts 2072 Comment
  RSA90184  Astragalus bicristatus F. W. Peirson 1930-7-5 9007 San Bernardino Road from Bear Lake to Holcomb Valley 2133 Comment
  RSA90359  Lotus davidsonii F. W. Peirson 1924-7-5 4898 San Bernardino Bluff Lake, San Bernardino Mountains. 2287 Comment
  RSA90721  Astragalus leucolobus F. W. Peirson 1924-5-15 4566 San Bernardino At foot of hills, Baldwin Lake 2042 Comment
  RSA90733  Astragalus acutirostris F. W. Peirson 1930-5-31 8925 San Bernardino Summit of grade above Warrens Well. Little San Bern Mtns. Comment
  RSA91064  Trifolium longipes subsp. atrorubens F. W. Peirson 1924-5-16 4598 San Bernardino 2.5 miles from Bear Lake Dam on south side of Bear Lake 2043 Comment
  RSA91336  Rupertia rigida F. W. Peirson 1930-7-3 8978 San Bernardino Road to Fish Hatchery, E of Bear Valley 2165 Comment
  RSA91735  Stipa lettermanii F. W. Peirson 1930-7-1 895 San Bernardino Baldwin Lake 2043 Comment
  RSA92311  Poa secunda F. W. Peirson 1924-5-14 4540 San Bernardino Box S Springs in Cushenberry [Cushenbury] Springs Region, north base of San Bernardino Mountains. 1082 Comment
  RSA92679  Eriophyllum lanatum var. obovatum F. W. Peirson 1924-7-5 4906 San Bernardino Bluff Lake, San Bernardino Mountains. 2287 Comment
  RSA92904  Madia elegans F. W. Peirson 1926-9-5 7071 San Bernardino Lake Arrowhead 1524 Comment
  RSA93097  Corethrogyne filaginifolia F. W. Peirson 1924-9-2 5180 San Bernardino Fish Camp. 2058 Comment
  RSA93179  Machaeranthera canescens F. W. Peirson 1920-8-22 2588 San Bernardino Ridge east of Foxesee Creek [Forsee Creek], San Bernardino Mts 2895 Comment
  RSA93638  Antennaria dimorpha F. W. Peirson 1920-5-19 2143 San Bernardino San Gabriel Mts., Devils Backbone Ridge. 2134 Comment
  RSA94381  Dyssodia cooperi F. W. Peirson 1930-5-31 8928 San Bernardino Summit of grade above Warrens Well. Little San Bern Mtns. Comment
  RSA94634  Syntrichopappus lemmonii F. W. Peirson 1917-5-13 1378 San Bernardino Summit of Cajon Pass 1098 Comment
  RSA94689  Senecio bernardinus F. W. Peirson 1922-6-23 3145 San Bernardino Sugarloaf Mountain 2438 Comment
  RSA95192  Sidalcea hickmanii subsp. parishii F. W. Peirson 1920-8-26 2251 San Bernardino Road crossing over Foresee Creek. 1677 Comment
Read comments
Jan 2 2012
  RSA95193  Sidalcea hickmanii subsp. parishii F. W. Peirson 1922-6-24 4697 San Bernardino Foxesee Creek. 1829 Comment
  RSA95249  Taraxacum californicum F. W. Peirson 1922-6-22 2261 San Bernardino South Fork of Santa Ana River 2348 Comment
  SBBG53804  Myosurus apetalus var. montanus F. W. Peirson 1926-5-31 San Bernardino Bluff Lake 2286 Comment
  SBBG98214  Saltugilia splendens subsp. splendens F. W. Peirson 1924-7-16 4972 San Bernardino Barton Flats Comment
  SD87652  Chrysothamnus viscidiflorus var. viscidiflorus Frank W. Peirson 1929-9-16 San Bernardino Fisheries road south of Baldwin Lake, Bear Valley. 2105 Comment
  SD87654  Ericameria parryi var. aspera F. W. Peirson 1929-9-16 8592 San Bernardino Slopes south of Baldwin Lake. Comment
  SD87760  Linanthus killipii F. W. Peirson 1926-5-30 6748 San Bernardino Low hills, north side of Baldwin Lake 2042 Comment
  SD87781  Astragalus nuttallianus var. imperfectus Frank W. Peirson 1935-4-18 11494 San Bernardino Whipple Mountains; north part of range near the road going down into Copper Basin. 455 Comment
  SD87787  Sidalcea hickmanii subsp. parishii F. W. Peirson 1920-8-26 2251 San Bernardino Road crossing Toxesee Creek. 1676 Comment
Read comments
Jan 2 2012
  UC1106912  Luzula comosa var. laxa Frank W. Peirson 1922-6-24 San Bernardino Santa Ana River San Bernardino Mts. 1920 Comment
  UC511749  Leymus triticoides Frank W. Peirson 1933-7-13 San Bernardino unused roadways near Baldwin Lake; San Bernardino Mts., Bear Valley 2057 Comment
  UC511777  Caulanthus major var. major Frank W. Peirson 1933-6-24 San Bernardino e shore Baldwin Lake; San Bernardino Mts., e shore Baldwin Lake 2057 Comment
  UC555341  Psorothamnus arborescens var. arborescens Frank W. Peirson 1927-5-7 7285 San Bernardino 10 mi w Barstow (open desert); w of Barstow Comment
  UC672181  Erigeron aphanactis var. congestus Frank W. Peirson 1923-8-24 1284 San Bernardino Summit San Gorgonio Peak 3490 Comment
  UC672291  Symphyotrichum spathulatum Frank W. Peirson 1926-9-5 7073 San Bernardino Arrowhead Lake, on dam San Bernardino Mts., Arrowhead Lake 1524 Comment
  UC813705  Ephedra nevadensis F. W. Peirson and I. M. Johnston 1922-5-14 6510 San Bernardino Summit of Pilot Knob Mohave Desert, Summit of Pilot Knob Comment
  UC971765  Gilia ochroleuca subsp. vivida F. W. Peirson August, 1906 920 San Bernardino Icehouse Canyon Divide San Gabriel Mountains, Icehouse Canyon Divide 2407 Comment
  UCR142706  Hesperocnide tenella F. W. Peirson 1924-5-14 4547 San Bernardino Mojave Desert, 12 miles east of Victorville, Deadman Point 915 Comment
  UCR143432  Tropidocarpum gracile F. W. Peirson 1922-5-13 2964 San Bernardino Mojave Desert, Granite Wells 1220 Comment
  CAS-BOT-BC418728  Eschscholzia glyptosperma Frank W. Peirson 1922-5-14 3003 San Bernardino 5 mi. north of Barstow, Mojave Desert Comment
  JEPS11097  Penstemon rostriflorus Frank W. Peirson 1922-7-19 3206 San Bernardino divide between Cucamonga and Ontario Peaks; San Gabriel Mountains, btw Cucamonga and Ontario Peaks 2407 Comment
  PASA146  Orthocarpus cinereus Frank W. Peirson 1931-7-1 San Bernardino Southwest shore of Baldwin Lake, San Bernardino Mts. 2042 Comment
  PASA2746  Astragalus preussii Frank W. Peirson 1930-4-15 8726 San Bernardino Road from Baker to Las Vegas at junction of Cima Road Comment
  PASA315  Malacothrix sonchoides Frank W. Peirson 1926-4-27 San Bernardino Vicinity of Box S. Ranch Comment
  PASA886  Apocynum androsaemifolium subsp. pumilum Frank W. Peirson 1930-6-8 San Bernardino Fish Hatchery Creek, Bear Valley, San Bernardino Mts. 2362 Comment
  PASA990  Castilleja pinetorum Frank W. Peirson 1930-7-8 San Bernardino Fish Hatchery Creek, North slope Sugarloaf, San Bernardino Mts. 2590 Comment
  POM146279  Apocynum X floribundum F. W. Peirson 1924-7-12 787 San Bernardino Glen Martin , damp ground. 1799 Comment
  POM14742  Phacelia rotundifolia F. W. Peirson 1922-5-13 2979 San Bernardino Summit of Pilot Knob, Mohave Desert. 1524 Comment
  POM162890  Apocynum androsaemifolium subsp. pumilum F. W. Peirson 1929-10-26 8603 San Bernardino Above Fish Camp, City Cr. Road. 2073 Comment
  RSA0016144  Monardella australis subsp. australis F. W. Peirson 1924-7-6 4926 San Bernardino Rim Road, San Bernardino Mtns. 1829 Comment
  RSA0016146  Monardella australis subsp. australis F. W. Peirson 1926-9-5 7078 San Bernardino Arrowhead Lake, San Bernardino Mts. 1524 Comment
  RSA0020146  Bromus tectorum F. W. Peirson 1924-5-14 4543 San Bernardino 12 miles east of Victorville. Comment
  RSA0022801  Monardella linoides subsp. erecta F. W. Peirson 1920-8-22 1069 San Bernardino Foxesee Creek, San Bernardino Mts. 2591 Comment
  RSA0070643  Cirsium mohavense F. W. Peirson 1924-8-31 5135 San Bernardino Box S Springs, north base of San Bernardino Mountains. 1082 Comment
  RSA0070988  Phacelia davidsonii F. W. Peirson 1924-7-16 4968 San Bernardino Road to Barton Flats, San Bernardino Mts. 1677 Comment
  RSA0117877  Myosurus minimus Frank W. Peirson 1926-5-31 6758 San Bernardino Considerable patches were found along north side of meadow about opposite to the spring; Bluff Lake. 2286 Comment
  RSA0124165  Thysanocarpus desertorum F. W. Peirson 1922-5-13 2970 San Bernardino Granite Wells, Mojave Desert. Comment
  RSA65185  Chorizanthe corrugata F. W. Peirson 1928-4-1 7762 San Bernardino Bordering the Amargosa Wash, 28 miles north of Baker Comment
  RSA65652  Claytonia parviflora subsp. tenuifolia F. W. Peirson 1922-6-24 604 San Bernardino Santa Ana River 1921 Comment
  RSA66013  Eriogonum nudum var. pauciflorum F. W. Peirson 1920-9-16 20 San Bernardino North Fork, San Antonio Creek. San Gabriel Mountains 1982 Comment
  RSA66812  Stanleya pinnata F. W. Peirson 1924-8-31 5125 San Bernardino open desert 2 miles W of Box S Ranch, North base of San Bernardino Mts 915 Comment
  RSA69662  Juncus macrophyllus F. W. Peirson 1924-9-2 5191 San Bernardino City Creek Road, San Bernardino Mountians. 1982 Comment
  RSA74817  Nama pusilla F. W. Peirson 1932-5-10 9954 San Bernardino 15 miles N of Baker on road to Death Valley. 213 Comment
  RSA75438  Camissonia hirtella F. W. Peirson 1924-7-16 4973 San Bernardino Burned area, Barton Flats Road, San Bernardino Mts. 1616 Comment
  RSA79866  Penstemon rostriflorus F. W. Peirson 1922-7-19 3206 San Bernardino Divide between Cucamonga and Ontario Peaks, San Gabriel Mtns, 2409 Comment
  RSA79928  Cryptantha cinerea var. abortiva F. W. Peirson 1924-5-16 4604 San Bernardino In woods on north side of east end of Bear Lake. San Bernardino Mtns. 2043 Comment
  RSA85613  Potentilla biennis F. W. Peirson 1922-8-27 4182 San Bernardino Banks of Santa Ana River about 1/4 mile above the South Fork 1936 Comment
  RSA87182  Lupinus elatus F. W. Peirson 1920-8-24 2253 San Bernardino Santa Ana River, San Bernardino Mts. 1982 Comment
  RSA87206  Lupinus formosus F. W. Peirson 1928-4-26 7927 San Bernardino 2 miles south of Warrens Well, east of Morongo Valley. Comment
  RSA90048  Lotus davidsonii F. W. Peirson 1929-8-23 8586 San Bernardino Woodland opposite Bear Valley Milling and Lumber Co. office 2073 Comment
  RSA90207  Bromus orcuttianus var. hallii F. W. Peirson 1929-7-11 8471 San Bernardino City Creek Road along the slopes of Bear Canyon, San Bernardino Mountains. 2134 Comment
  RSA90406  Lotus argyraeus F. W. Peirson 1933-6-24 10677 San Bernardino Along ridge Southward from summit of Johnson Grade, eastern San Bernardino Mts 2134 Comment
  RSA90660  Chrysothamnus nauseosus subsp. consimilis F. W. Peirson 1935-11-10 s.n. San Bernardino Meadow on road to fisheries, Bear Valley, San Bernardino Mountains 2134 Comment
  RSA90663  Chrysothamnus nauseosus subsp. consimilis F. W. Peirson 1929-10-11 8597 San Bernardino City Creek road, 2-3miles W of Bear Lake Dam, San Bernardino Mts. 2134 Comment
  RSA90686  Gutierrezia microcephala F. W. Peirson 1928-9-6 8203 San Bernardino 1 mile S of Warrens Well, Southern Mojave Desert Comment
Read comments
Mar 24 2011
  RSA90724  Astragalus purshii var. tinctus F. W. Peirson 1922-5-13 2976 San Bernardino Granite Wells, Mojave Desert. Comment
  RSA90852  Carex senta F. W. Peirson 1924-7-14 4954 San Bernardino Lost Creek, San Bernardino Mountains. 2287 Comment
  RSA90906  Chrysothamnus nauseosus subsp. bernardinus F. W. Peirson 1923-8-25 3998 San Bernardino near foot of Vivian Trail, Mill Creek, San Bernardino Mts. 1829 Comment
  RSA90980  Erigeron breweri var. covillei F. W. Peirson 1924-7-14 4952 San Bernardino Lost Creek, San Bernardino Mountains. 2287 Comment
  RSA90995  Trifolium wormskioldii F. W. Peirson 1924-9-1 5170 San Bernardino Arrastre Flat, Holcomb Valley, San Bernardino Mts. 2271 Comment
  RSA91028  Erigeron aphanactis var. congestus F. W. Peirson 1933-6-24 10676 San Bernardino Along ridge Southward from summit of Johnson Grade, eastern San Bernardino Mts 2134 Comment
  RSA91139  Trifolium monanthum subsp. grantianum F. W. Peirson 1924-7-14 4950 San Bernardino Lost Creek, San Bernardino Mts. Comment
  RSA91721  Gnaphalium thermale F. W. Peirson 1920-9-16 5251 San Bernardino North Fork, San Antonio Creek. San Gabriel Mountains 1982 Comment
  RSA91906  Phalaris canariensis F. W. Peirson 1922-6-20 3107 San Bernardino 4 miles east of San Bernardino. Comment
  RSA92100  Cyperus laevigatus F. W. Peirson 1928-9-6 8204 San Bernardino Covington Ranch, Morongo Valley. Comment
  RSA92151  Eleocharis parishii F. W. Peirson 1928-9-5 8201 San Bernardino Below Cottonwood Spring, 0.5 mile north of Old Woman Springs, southern Mojave Desert 970 Comment
  RSA92278  Layia glandulosa F. W. Peirson 1924-5-14 4554 San Bernardino 2 miles N of Cajon Pass. 915 Comment
  RSA92286  Layia glandulosa F. W. Peirson 1924-5-15 4591 San Bernardino Baldwin Lake. 2043 Comment
  RSA92506  Filago californica F. W. Peirson 1935-4-18 11480 San Bernardino Copper basin creek, Whipple Mtns., eastern San Bernardino County. Comment
  RSA92866  Urtica dioica subsp. holosericea F. W. Peirson 1919-6-6 30 San Bernardino North Fork of San Antonio Creek, San Gabriel Mts. 2439 Comment
  RSA92890  Populus tremuloides F. W. Peirson 1924-7-13 4940 San Bernardino Fish Creek. 2195 Comment
  RSA92892  Lasthenia gracilis F. W. Peirson 1919-4-16 389 San Bernardino Foot of Mtns near Lytle Creek. 534 Comment
  RSA92895  Hesperocnide tenella F. W. Peirson 1924-5-14 4547 San Bernardino 12 miles east of Victorville. Comment
  RSA92901  Madia elegans subsp. densifolia F. W. Peirson 1919-6-5 237 San Bernardino Camp Baldy, San Antonio Canyon, San Gabriel Mts., Los Angeles - San Bernardino Co. line. 1341 Comment
  RSA93156  Machaeranthera canescens F. W. Peirson 1922-8-23 3289 San Bernardino Wood borders, S Fork of Santa Ana River, San Bernardino Mts 2561 Comment
  RSA93167  Baccharis emoryi F. W. Peirson 1920-12-30 1297 San Bernardino E of bridge across Santa Ana River, SE of San Bernardino 305 Comment
  RSA93181  Machaeranthera canescens F. W. Peirson 1927-7-10 7357 San Bernardino Mexican Well, eastern border of San Bernardino Co. 1220 Comment
  RSA93219  Ericameria cooperi F. W. Peirson 1921-5-30 5427 San Bernardino Mojave River, Victorville. 884 Comment
  RSA93294  Ericameria cooperi F. W. Peirson 1928-4-25 7920 San Bernardino White Tank region 11 miles S of 29 Palms. Comment
  RSA93347  Xylorhiza tortifolia F. W. Peirson 1917-5-13 1269 San Bernardino West of Victorville. Comment
  RSA93741  Aster frondosus F. W. Peirson 1924-7-5 4595 a San Bernardino North shore of Baldwin Lake 2037 Comment
  RSA93768  Geraea canescens F. W. Peirson 1927-5-7 7286 San Bernardino 10 miles W of Barstow Comment
  RSA93775  Lobelia cardinalis subsp. graminea F. W. Peirson 1907-8-14 1211 San Bernardino Road from Seven Oaks to Bear Valley, San Bernardino Mountains. Comment
  RSA93828  Chaenactis carphoclinia var. carphoclinia F. W. Peirson 1922-5-12 2974 San Bernardino Mojave Desert. 10 miles north of Barstow. Comment
  RSA93848  Baileya pleniradiata F. W. Peirson 1916-7-8 1366 San Bernardino Box 'S' Springs near north base of San Bernardino Mtns. 1082 Comment
  RSA93852  Chrysothamnus parryi subsp. asper F. W. Peirson 1924-9-1 5168 San Bernardino Arrastre Flats, Holcomb Valley, San Bernardino Mts 2287 Comment
  RSA93887  Helenium bigelovii F. W. Peirson 1924-7-14 4960 San Bernardino Small hillside cienega Lost Creek, San Bernardino Mts, southern California. 2591 Comment
  RSA93906  Iva axillaris subsp. robustior F. W. Peirson 1921-5-30 2786 San Bernardino Mojave River 884 Comment
  RSA93966  Machaeranthera pinnatifida subsp. gooddingii F. W. Peirson 1935-4-10 11489 San Bernardino Rocky canyon walls, Copper Basin Creek, Whipple Mts. Comment
Read comments
Aug 9 2011
  RSA94198  Artemisia ludoviciana subsp. incompta F. W. Peirson 1924-8-31 5118 San Bernardino Along ponds south of Victorville 793 Comment
  RSA94384  Dyssodia cooperi F. W. Peirson 1927-5-8 7292 San Bernardino Half way between Victorville and Barstow. Comment
  RSA94490  Arnica chamissonis subsp. foliosa F. W. Peirson 1929-7-11 8464 San Bernardino Fawskin, Bear Valley, San Bernardino Mts. Summit of ridge back of public campgrounds. 2043 Comment
  RSA94575  Artemisia biennis F. W. Peirson 1924-9-1 5160 San Bernardino North side of Baldwin Lake, San Bernardino Mountains. 2043 Comment
  RSA94946  Tetradymia canescens F. W. Peirson 1920-8-25 2771 San Bernardino along trail that follows west bank of canyon of South Fork of Santa Ana River, San Bernardino Mts. 2134 Comment
  RSA95003  Malacothrix glabrata F. W. Peirson 1920-5-19 2149 San Bernardino North Fork of Lytle Creek, San Gabriel Mts 1067 Comment
  RSA95022  Malacothrix sonchoides F. W. Peirson 1922-5-14 3001 San Bernardino 8 miles north of Barstow. Comment
  RSA95023  Malacothrix sonchoides F. W. Peirson 1930-4-29 8764 San Bernardino Open desert near Box S Ranch, SW San Bernardino County. 915 Comment
  RSA95051  Sonchus asper F. W. Peirson 1923-3-18 1487 San Bernardino Along ditch south of Chino. Comment
  RSA95054  Picris echioides F. W. Peirson 1920-6-22 2169 San Bernardino 2 miles south of Chino Comment
  RSA95096  Calycoseris parryi F. W. Peirson 1930-4-14 8706 San Bernardino About 3 miles north of Cave Spring. Comment
  RSA95157  Hieracium horridum F. W. Peirson 1920-8-22 2343 San Bernardino Foxesee Creek [Forsee Creek], San Bernardino Mountains 2743 Comment
  RSA97383  Lomatium nevadense var. parishii F. W. Peirson 1920-5-19 2679 San Bernardino Coldwater Canyon, fork of Lytle Creek, San Gabriel Mountains 1677 Comment
  RSA97385  Cicuta bolanderi F. W. Peirson 1924-9-2 5205 San Bernardino Santa Ana River Marshes, 2 miles south of San Bernardino. 305 Comment
  RSA97433A  Lomatium mohavense subsp. mohavense F. W. Peirson 1922-5-12 2973 San Bernardino Old road through Cajon Pass 1098 Comment
  RSA97447  Phoradendron pauciflorum F. W. Peirson 1909-08 1718 San Bernardino on Abies concolor; South Fork of Santa Ana River. Comment
  RSA98358  Berula erecta F. W. Peirson 1930-7-10 9042 San Bernardino in stream from Box S Spring, foot of Cushenberry Grade, north base of mountains. 1082 Comment
  SEINET10460621  Heterocodon rariflorum Frank W. Peirson Peirson 1210 San Bernardino SAN GABRIEL MTNS Comment
  SEINET3882078  Luzula campestris Frank W. Peirson 1922-6-24 s.n. San Bernardino In damp shaded location. Santa Ana River, San Bernardino Mts.; 0 1920 Comment
  UC909098  Loeseliastrum matthewsii Frank W. Peirson 1927-5-7 7283 San Bernardino several mi. e. Kramer Comment
  UC909101  Loeseliastrum matthewsii Frank W. Peirson 1927-5-7 7283 San Bernardino several mi. e. Kramer Comment
  CAS-BOT-BC115656  Carex triquetra Frank Warrington Peirson 1923-3-26 4266 San Diego Ca. 0.5 mi N of Encinitas on West sloping hill. Comment
  CAS-BOT-BC243666  Justicia californica Frank W. Peirson 1928-3-24 7736 San Diego San Felipe Creek near the foot of Sentenac Canyon Comment
  CAS-BOT-BC348554  Micropus californicus var. californicus Frank W. Peirson 1930-5-11 8779 San Diego Henshaw Dam, northeastern San Diego County 853 Comment
  CAS-BOT-BC407812  Gilia ochroleuca subsp. exilis F. W. Peirson 1929-5-5 8363 San Diego South slope of divide between Oak Grove and Warner's Hot Springs 914 Comment
  CAS-BOT-BC407814  Gilia ochroleuca subsp. exilis F. W. Peirson 1929-5-4 8342 San Diego About 5 miles N of Oak Grove Comment
  CAS-BOT-BC46323  Arctostaphylos pungens Frank W. Peirson 1929-3-30 8279 San Diego Pines Hills Lodge near Julian. Comment
  CAS-BOT-BC47734  Bursera microphylla Frank W. Peirson 1941-4-7 13071 San Diego Six miles south of the San Felipoe Boulevard. Road from Ocotillo gas station Comment
  JEPS11813  Githopsis diffusa subsp. candida Frank W. Peirson 1925-5-19 6003 San Diego 1 mi s Morettis Comment
  JEPS42339  Ceanothus palmeri Frank W. Peirson 1925-5-16 5931 San Diego ca 1 mi n Laguna Lakes Camp (along ridge); Laguna Mts. Comment
  JEPS4977  Eriophyllum wallacei Frank W. Peirson 1925-5-16 5935 San Diego about one mi n Laguna Lakes camp; Laguna Mts. 1828 Comment
  JEPS61530  Allium haematochiton F. W. Peirson 1922-4-14 2914 San Diego Torrey Pines Reservation Comment
  LA38990  Mimulus fremontii Frank W. Peirson; 1926-5-1 6721 San Diego Oak Grove 853 Comment
  PASA1061  Lotus americanus Frank W. Peirson 1920-6-25 San Diego San Luis Rey River. Road from Oak Grove to Warners Hot Springs 914 Comment
  PASA1064  Lotus argophyllus Frank W. Peirson 1925-5-18 San Diego Cuyamaca Lake Comment
  PASA1097  Lotus hamatus Frank W. Peirson 1927-4-19 San Diego Headland south of Torrey Pines Comment
  PASA1281  Spergularia clevelandii Frank W. Peirson 1922-4-14 San Diego Roadside near La Jolla Comment
  PASA1772  Hibiscus denudatus Frank W. Peirson 1928-3-24 San Diego Sentenac Canyon, San Felipe Creek Comment
  PASA1773  Horsfordia newberryi Frank W. Peirson 1928-4-22 San Diego San Felipe Creek, 2 miles below the Sentenac Comment
  PASA2163  Brickellia frutescens Frank W. Peirson 1928-4-22 San Diego San Felipe Creek at the Narrows Comment
  PASA2595  Tropidocarpum gracile Frank W. Peirson 1928-3-24 7728 San Diego Warner's Hot Springs, in auto camp grounds 960 Comment
  PASA325  Malacothrix californica var. glabrata Frank W. Peirson 1928-4-20 San Diego San Felipe Creek at foot of Sentenac Canyon Comment
  PASA621  Lilaea subulata Frank W. Peirson 1923-3-28 San Diego On the Mesa about 6 miles north of San Diego 121 Comment
  POM128739  Trifolium depauperatum var. amplectens F. W. Peirson 1927-4-19 7252 San Diego Headland South of Torrey Pines Comment
  POM128756  Clematis pauciflora F. W. Peirson 1927-4-17 7225 San Diego Summit of Mountain Springs Grade. Comment
  POM128763  Anagallis minima F. W. Peirson 1927-4-19 7251 San Diego Headland South of Torrey Pines Comment
  POM47630  Arctostaphylos glandulosa subsp. adamsii F. W. Peirson 1924-6-27 4884 San Diego Monument Peak, Laguna Mts. Comment
  POM87087  Lupinus agardhianus F. W. Peirson 1922-4-14 2908 San Diego Grossmont, 10 miles east of San Diego. Comment
  RSA377451  Calochortus splendens Frank W. Peirson 1924-6-25 s.n. San Diego Laguna Lakes Region, Laguna Mountains. Comment
  RSA427394  Solanum umbelliferum F. W. Peirson 1926-5-1 6720 San Diego Bottom lands of temecula River, Oak grove. 854 Comment
  RSA435956  Lyrocarpa coulteri var. palmeri F. W. Peirson 1928-3-24 7749 San Diego San Felipe Creek, 2 miles below Sentenac Canyon, eastern SD county. Comment
  RSA440743  Trichostema parishii F. W. Peirson 1924-6-24 4878 San Diego South side Palomar 1220 Comment
  RSA498327  Lotus heermannii F. W. Peirson 1924-6-23 s.n. San Diego Upper Doane Valley Palomar 1494 Comment
  RSA65166  Lastarriaea coriacea F. W. Peirson 3360 San Diego 6 miles north of San Diego on the Escondido Road. 122 Comment
  RSA66167  Erysimum capitatum var. capitatum F. W. Peirson 1923-3-26 4183 San Diego Near Encinitas. Comment
  RSA66530  Athysanus pusillus F. W. Peirson 1925-5-15 5928 San Diego Laguna Lakes, Laguna Mountains. Comment
  RSA66750  Caulanthus cooperi F. W. Peirson 1922-4-13 2865 San Diego Mountain Springs, eastern San Diego. 793 Comment
  RSA66755  Caulanthus hallii F. W. Peirson 1929-5-4 8344 San Diego About 5 miles N of Oak Grove. 762 Comment
Read comments
May 10 2017
  RSA68987  Plantago patagonica F. W. Peirson 1930-5-11 8778 San Diego near Henshaw Dam. 854 Comment
  RSA69663  Juncus macrophyllus F. W. Peirson 1924-6-25 4851 San Diego Above camp [Laguna Camp?], Laguna Lakes Region, Laguna Mountains. Comment
  RSA69993  Allionia incarnata F. W. Peirson 1927-4-14 7184 San Diego Near east end of Santa Rosa Mountains, 8 miles from Imperial Valley Boulevard. 305 Comment
  RSA69995  Allionia incarnata F. W. Peirson 1924-6-26 4877 San Diego Lower part of Vallecito Canyon. Comment
  RSA70083  Piperia cooperi Frank W. Peirson 1926-4-30 6697 San Diego About 2 miles east from Pala on the road to Henshaw Dam Comment
Read comments
Dec 9 2011
  RSA70428  Ditaxis lanceolata F. W. Peirson 1928-4-22 7877 San Diego steep rocky canyon immediately west of the Narrows, San Felipe Creek. Comment
  RSA70557  Croton californicus F. W. Peirson 1924-6-22 4801 San Diego Top of ridge east of Baucher Hill, Palomar Mts. 1555 Comment
  RSA70849  Arctostaphylos glandulosa subsp. adamsii F. W. Peirson 1929-3-31 8280 San Diego Pine Hills Lodge, near Julian. Comment
  RSA70857  Xylococcus bicolor F. W. Peirson 1922-4-14 830 San Diego Torrey Pines Park near San Diego Comment
  RSA70866  Arctostaphylos pringlei subsp. drupacea F. W. Peirson 1925-5-16 5937 San Diego Monument Peak, Laguna Mts. Comment
  RSA70880  Arctostaphylos glandulosa subsp. glandulosa F. W. Peirson 1926-5-1 6717 San Diego Along trail from Oak Grove to Palomar Mt. 1524 Comment
  RSA71806  Gilia stellata F. W. Peirson 1928-4-21 7866 San Diego San Felipe Creek near jct. of Grapevine Canyon and foot of Sentenac Canyon. Comment
  RSA71882  Gilia diegensis F. W. Peirson 1920-6-24 2294 San Diego On east trail to Palomar Mtn. 1677 Comment
  RSA71950  Collomia grandiflora F. W. Peirson 1920-6-24 911 San Diego Meadow east of Morgan Hill; Palomar Mts. 1433 Comment
  RSA73090  Linanthus dianthiflorus subsp. dianthiflorus F. W. Peirson 1929-5-4 8341 San Diego About 5 miles N of Oak Grove. 762 Comment
Read comments
May 10 2017
  RSA73286  Linanthus pungens subsp. hallii F. W. Peirson 1927-4-17 7227 San Diego South of boulevard on Mountain Springs Grade 1128 Comment
  RSA73358  Clarkia rhomboidea F. W. Peirson 1924-6-22 4784 San Diego At Country Club, Palomar Mts. 1616 Comment
  RSA74933  Phacelia distans F. W. Peirson 1928-4-20 7859 San Diego 2 miles S of San Felipe Creek, near mouth of Sentenac Canyon, Eastern San Diego County. Comment
  RSA75879  Nemophila menziesii var. integrifolia F. W. Peirson 1925-5-15 5902 San Diego 4 miles south of Buckman Springs. 1220 Comment
  RSA75989  Eucrypta chrysanthemifolia var. bipinnatifida F. W. Peirson 1928-4-20 7844 San Diego San Felipe creek, 2 miles west of Sentenac Canyon, eastern San Diego County. Comment
  RSA77767  Viola douglasii F. W. Peirson 1925-5-15 5920 San Diego Laguna Lakes, Laguna Mountains. Comment
  RSA79590  Cryptantha barbigera F. W. Peirson 1925-5-15 5890 San Diego summit of Mountain Springs Grade, eastern San Diego 1067 Comment
  RSA79607  Cryptantha intermedia F. W. Peirson 1924-6-22 4779 San Diego Country Club, Palomar Mts. Comment
  RSA79849  Penstemon labrosus F. W. Peirson 1924-6-22 4790 San Diego At Country Club, Palomar Mts. 1616 Comment
  RSA80012  Cryptantha micrantha var. lepida F. W. Peirson 1920-6-24 2167 San Diego Meadow east of Morgan Hill; Palomar Mts 1433 Comment
  RSA80053  Veronica peregrina subsp. xalapensis F. W. Peirson 1920-6-24 4496 San Diego East foot of Morgan Hill, Palomar Mts. 1433 Comment
  RSA80176  Antirrhinum nuttallianum subsp. nuttallianum F. W. Peirson 1929-5-4 8346 San Diego On trail from Oak Grove to Palomar Mtn. 1067 Comment
  RSA80307  Orthocarpus densiflorus var. gracilis F. W. Peirson 1923-3-27 3372 San Diego Otay Creek. 30 Comment
  RSA80319  Orthocarpus densiflorus var. gracilis F. W. Peirson 1927-4-19 7247 San Diego Headland South of Torrey Pines Comment
  RSA80642  Boisduvalia densiflora F. W. Peirson 1920-6-25 2194 San Diego Moretti s south of Warner s Hot Springs. 884 Comment
  RSA80728  Nicotiana obtusifolia F. W. Peirson 1928-3-24 7742 San Diego San Felipe Creek, ca 2 miles below Sentenac Canyon, western Colorado Desert. Comment
  RSA81008  Tamarix parviflora F. W. Peirson 1923-3-28 4110 San Diego On boulevard about 10-15 miles south opf Temecula Comment
  RSA82189  Trichostema parishii F. W. Peirson 1925-5-18 5961 San Diego Lower part of grade from Guatay to Laguna Mountains. Comment
  RSA82222  Verbena menthifolia F. W. Peirson 1923-3-27 3379 San Diego Otay Creek. 2 miles below dam and at about 250 ft. 76 Comment
  RSA82517  Limosella acaulis F. W. Peirson 1924-6-25 4841 San Diego border of Little Lake. Comment
  RSA82569  Stachys rigida subsp. quercetorum F. W. Peirson 1924-6-25 4860 San Diego Laguna Mountains: Meadow near Laguna Lakes. 1524 Comment
  RSA83926  Ranunculus californicus F. W. Peirson 1924-6-22 4794 San Diego Near the Country Club, Mt. Palomar. 1585 Comment
  RSA83937  Ranunculus californicus F. W. Peirson 1925-5-15 5909 San Diego Laguna Lakes, Laguna Mountains. Comment
  RSA84267  Ranunculus aquatilis var. capillaceus F. W. Peirson 1924-6-27 4864 San Diego ponds at Laguna Lakes 1524 Comment
  RSA85554  Cheilanthes clevelandii F. W. Peirson 1979-5-24 8347 San Diego along central part of trail from Oak Grove to Palomar Mt. Comment
  RSA85871  Fragaria californica F. W. Peirson 1925-5-19 5997 San Diego Middle Peak, Cuyamaca Mountains, eastern San Diego County 1616 Comment
  RSA86660  Sanguisorba annua F. W. Peirson 1924-6-24 4828 San Diego South of Cuyamaca Lake. 1433 Comment
  RSA86662  Coleogyne ramosissima F. W. Peirson 1928-4-20 7846 San Diego South slope of canyon of San Felipe Creek, near foot of Sentenac Canyon. Comment
  RSA86855  Prunus fremontii F. W. Peirson 1922-4-13 2895 San Diego Near Mountain Springs. 793 Comment
  RSA86992  Cercis occidentalis F. W. Peirson 1924-6-26 4868 San Diego At foot of steep portion of trail from Vallecito Canyon to Laguna Mts. Comment
  RSA87086  Lupinus concinnus subsp. orcuttii F. W. Peirson 1922-4-13 2907 San Diego Mountain Springs grade east of Jacumba; eastern San Diego 1067 Comment
  RSA91724  Gastridium phleoides F. W. Peirson 1926-4-30 6700 San Diego About 2 miles east from Pala on the road to Henshaw Dam Comment
  SD87560  Linanthus orcuttii Frank W. Peirson 1920-6-24 2173 San Diego Ridge westward from Palomar Peak (IPB 2/06) 1431 Comment
  SD87676  Cyperus laevigatus Frank W. Peirson 1924-12-30 5405 San Diego 1000 Palms CaA'on [a.k.a. Salvador Canyon], in wet places along stream. 121 Comment
Read comments
Jul 11 2016
  SD87764  Castilleja densiflora subsp. gracilis Frank W. Peirson 1923-3-27 3372 San Diego Otay Creek, field on roadside 29 Comment
  UC501526  Githopsis diffusa subsp. candida Frank W. Peirson 1925-5-19 6003 San Diego 1 mi s Morettis 944 Comment
  UC581529  Viola lobata subsp. lobata Frank W. Peirson 1925-5-19 5996 San Diego Middle Peak; Cuyamaca Mountains, Middle Peak 1676 Comment
  CAS-BOT-BC515149  Eriastrum sapphirinum subsp. sapphirinum F. W. Peirson 1920-6-23 2299 San Diego Oak Grove 1158 Comment
  POM9920  Petunia parviflora F. W. Peirson 1920-6-25 2207 San Diego San Luis Rey. 915 Comment
  RSA0013308  Senecio californicus F. W. Peirson 1923-3-27 s.n. San Diego Low slope about saline flat, 1/4 mile from beach; Imperial Beach. Comment
  RSA0028102  Mirabilis multiflora var. pubescens F. W. Peirson 1920-6-22 1851 San Diego Oak Grove, Palomar Region 854 Comment
  RSA0117319  Collinsia parviflora F. W. Peirson 1925-5-15 5927 San Diego Laguna Lakes, Laguna Mts 1524 Comment
  RSA0124136  Eriastrum sapphirinum subsp. sapphirinum F. W. Peirson 1920-6-23 2299 San Diego Oak Grove. 854 Comment
  RSA0125607  Echinocereus engelmannii var. engelmannii F. W. Peirson 1928-4-20 7843 San Diego Near summit of low hill on San Felipe Creek, about 2 miles above Sentenac Canyon. Comment
  RSA0126446  Nemacladus longiflorus var. longiflorus F. W. Peirson 1925-5-15 5900 San Diego 4 miles south of Buckman Springs. 1220 Comment
  RSA128758  Arctostaphylos glandulosa subsp. adamsii F. W. Peirson 1927-4-18 7233 San Diego About 1/2 way from Newtown to Buckman Sps. Comment
  RSA65664  Claytonia parviflora F. W. Peirson 1920-6-24 2816 San Diego East foot of Morgan Hill, Palomar Mts. 1433 Comment
Read comments
Sep 7 2010
  RSA90284  Lathyrus vestitus subsp. alefeldii F. W. Peirson 1920-6-24 2012 San Diego Trail from Oak Grove to Palomar Mountain 1677 Comment
  RSA90696  Gutierrezia sarothrae F. W. Peirson 1932-9-4 10458 San Diego 3 miles east of Chula Vista. 76 Comment
  RSA90710  Astragalus trichopodus var. lonchus F. W. Peirson 1923-3-27 3396 San Diego Imperial Beach. Comment
  RSA90775  Astragalus palmeri F. W. Peirson 1922-4-13 2899 San Diego East summit at head of Mountain Springs Grade, Eastern San Diego. 1067 Comment
  RSA90855  Carex triquetra F. W. Peirson 1926-4-30 6698 San Diego Bushy slope about 2 miles east of Pala. Comment
  RSA90957  Erigeron divergens F. W. Peirson 1924-6-25 4845 San Diego Above camp [Laguna Camp?], Laguna Lakes Region, Laguna Mountains. Comment
  RSA90990  Trifolium wormskioldii F. W. Peirson 1925-5-18 5973 San Diego North shore of Cuyamaca Lake. 1402 Comment
  RSA91087  Trifolium depauperatum var. truncatum F. W. Peirson 1927-4-19 7252 San Diego Sink on headland south of Torrey Pines Comment
  RSA91097  Trifolium variegatum F. W. Peirson 1920-6-24 4421 San Diego Meadow east of Morgan Hill; Palomar Mts. 1433 Comment
  RSA91219  Krameria erecta F. W. Peirson 1927-4-14 7185 San Diego Near east end of Santa Rosa Mountains, 8 miles from Imperial Valley Boulevard. 305 Comment
  RSA91600  Carex multicaulis F. W. Peirson 1925-5-19 5999 San Diego Middle Peak, Cuyamaca Mountains, eastern San Diego County 1677 Comment
  RSA91696  Gnaphalium palustre F. W. Peirson 1920-6-25 2493 San Diego from Oak Grove to Warners Hot Springs. 915 Comment
  RSA92092  Eleocharis montevidensis var. montevidensis F. W. Peirson 1925-5-19 6005 San Diego Road crossing a few miles north of Warners Hots Spring, San Luis Rey River 915 Comment
  RSA92260  Porophyllum gracile F. W. Peirson 1927-4-17 7221 San Diego On north side of boulevard at head of Mountain Springs Grade, eastern San Diego Co. Comment
  RSA92893  Lasthenia californica F. W. Peirson 1925-5-18 6018 San Diego North shore of Cyamaca Lake 1402 Comment
  RSA93804  Chaenactis glabriuscula var. glabriuscula F. W. Peirson 1924-6-25 4833 San Diego Laguna Lakes Region, Laguna Mountains. Comment
  RSA94127  Hulsea vestita subsp. callicarpha F. W. Peirson 1924-6-22 4796 San Diego At Country Club, Palomar Mts. 1616 Comment
  RSA94909  Cirsium scariosum F. W. Peirson 1920-6-24 2767 San Diego East of Morgan Hill, Palomar Mountains 1433 Comment
  RSA95005  Malacothrix glabrata F. W. Peirson 1928-4-20 7852 San Diego San Felipe Creek 1 mile below Senetac Canyon, San Diego Comment
  RSA95285  Rhamnus tomentella subsp. tomentella F. W. Peirson 1920-6-24 2192 San Diego [Unspecified] 1829 Comment
  RSA95292  Rhamnus ilicifolia F. W. Peirson 1930-5-11 8786 San Diego Below Henshaw Dam 671 Comment
  PASA1708  Ericameria ericoides Frank W. Peirson 1925-9-13 San Francisco Golden Gate Park Comment
  PASA2769  Pellaea bridgesii F. W. Peirson 1921-7-1 Y 60 San Francisco Merced Lake trail Comment
  RSA93256  Ericameria ericoides var. ericoides F. W. Peirson 1925-9-13 6431 San Francisco Back from small lake, Golden Gate Park, San Francisco Comment
  POM20548  Lupinus arboreus var. arboreus F. W. Peirson 1923-6-26 s.n. San Luis Obispo Arroyo Grande. Comment
  RSA68726  Fritillaria affinis Frank W. Peirson 1925-3-25 5691 San Luis Obispo Pismo Creek. 30 Comment
  RSA69457  Juncus breweri F. W. Peirson 1920-7-29 2213 San Luis Obispo 1 mile south of Pismo, on sand dunes. Comment
  RSA82231  Castilleja affinis F. W. Peirson 1920-7-29 1149 San Luis Obispo 1 mile south of Pismo Beach. Comment
  RSA87229  Lupinus variicolor F. W. Peirson 1920-7-31 2228 San Luis Obispo Morro Bay Comment
  CAS-BOT-BC166414  Epilobium canum subsp. canum Peirson 1920-7-30 2234 San Luis Obispo Willow Creek, Morro region, sea level Comment
  RSA0004736  Eriastrum densifolium subsp. densifolium F. W. Peirson 1920-7-29 2224 San Luis Obispo 1 mile south of Pismo Beach. Comment
  RSA0025948  Abronia umbellata F. W. Peirson 1920-7-29 2324 San Luis Obispo 1 mile S of Pismo Beach. Comment
  RSA69696  Mentzelia affinis F. W. Peirson 1929-5-18 8404 San Luis Obispo Upper Cuyama Valley. Comment
  RSA71102  Calystegia macrostegia subsp. cyclostegia F. W. Peirson 1925-3-25 5670 San Luis Obispo Morro Creek Divide 427 Comment
  RSA79580  Plagiobothrys trachycarpus F. W. Peirson 1925-3-25 5669 San Luis Obispo Morro Creek Divide. 427 Comment
  RSA80841  Orthocarpus attenuatus F. W. Peirson 1925-3-25 5666 San Luis Obispo On Morro Creek Divide. 427 Comment
  RSA87078  Lupinus nanus subsp. nanus F. W. Peirson 1923-6-26 3611 San Luis Obispo Roadside north of Templeton. Comment
  RSA90768  Astragalus trichopodus var. trichopodus F. W. Peirson 1929-5-18 8392 San Luis Obispo at first bridge over Cuyama River on Cuyama Valley road, 8 miles E of the Coast Blvd Comment
  RSA91993  Polypogon monspeliensis F. W. Peirson 1932-7-4 10238 San Luis Obispo Oceano. Comment
  RSA92165  Schoenoplectus californicus F. W. Peirson 1920-7-29 4272 San Luis Obispo 1 mile south of Pismo Beach. Comment
  RSA97380  Lomatium parvifolium F. W. Peirson 1925-3-25 5671 San Luis Obispo Morro Creek 152 Comment
  SD87703  Malacothrix incana F. W. Peirson 1920-7-29 2225 San Luis Obispo Pismo Comment
  UC599231  Caulanthus californicus Frank W. Peirson 1938-4-12 12387 San Luis Obispo roadside in upper Cuyama Valley (in extreme se corner of county); in upper Cuyama Valley Comment
  RSA91713  Gnaphalium ramosissimum F. W. Peirson 1925-9-13 6426 San Mateo Rockaway beach Comment
  RSA94535  Artemisia californica F. W. Peirson 1925-9-13 6429 San Mateo Rockaway beach. Comment
  CAS-BOT-BC157023  Solanum umbelliferum F. W. Peirson 1938-4-13 12386 Santa Barbara Surf Comment
  CAS-BOT-BC196211  Lupinus albifrons var. douglasii Frank W. Peirson 1929-5-18 8382 Santa Barbara Miguelito Park, 4 miles s. of Lompoc 121 Comment
  CAS-BOT-BC95416  Bowlesia incana Mabel B. Peirson 1927-4-12 7127 Santa Barbara Lady's Harbor, Santa Cruz Island Comment
  JEPS200  Sanicula arguta Mabel Peirson Apr 12 1927-Apr 14 1927 Santa Barbara Prisoner's Cove Santa Cruz Isl. Comment
  JEPS20189  Hazardia detonsa Mabel Peirson Apr 12 1927-Apr 14 1927 Santa Barbara Lody's Harbor Santa Cruz Island, Lody's Harbor Comment
Read comments
Dec 30 2014
  JEPS45614  Aphanes occidentalis Mabel Peirson Apr 12 1927-Apr 14 1927 Santa Barbara Santa Cruz Island Prisoner's Cove; , Prisoners Cove Comment
  JEPS66595  Comarostaphylis diversifolia subsp. planifolia Mabel Peirson Apr 12 1927-Apr 14 1927 Santa Barbara Santa Cruz Island Lady's Harbor; , Lady's Harbor Comment
  PASA1603  Meconella linearis Frank W. Peirson 1929-4-20 Santa Barbara Near Surf. Near sea level Comment
  RSA428785  Solanum umbelliferum F. W. Peirson 1929-4-20 8321 Santa Barbara Surf. Comment
  RSA66532  Athysanus pusillus F. W. Peirson 1934-3-27 11071 Santa Barbara Above Frye s Harbor, Santa Cruz Island 366 Comment
  RSA70311  Juncus xiphioides F. W. Peirson 1920-7-28 2214 Santa Barbara Canada del Refugio, at sea level. 0 Comment
  RSA70895  Arctostaphylos tomentosa subsp. subcordata Mabel Peirson 1927-4-12 7141 Santa Barbara Santa Cruz Island. Lady's Harbor. 609 Comment
Read comments
Mar 8 2007
  RSA70901  Arctostaphylos rudis F. W. Peirson 1925-3-26 5697 Santa Barbara On summit of road to Lompoc via Cebada Canyon. 335 Comment
  RSA75798  Pholistoma auritum F. W. Peirson 1929-4-20 8296 Santa Barbara El Capitan Camp, shore of Santa Barbara County, west of Goleta. Comment
  RSA76026  Pholistoma racemosum Mabel Peirson 1927-4-14 7146 Santa Barbara Santa Cruz Island. Prisoners Cove. Comment
Read comments
Dec 30 2014
  RSA77355  Ceanothus ramulosus var. fascicularis F. W. Peirson 1925-3-26 5704 Santa Barbara Cebada Canyon. 183 Comment
  RSA82365  Scutellaria tuberosa Mabel Peirson 1934-3-26 11097 Santa Barbara Santa Cruz Island. Prisoners Cove. Comment
  RSA84466  Clematis lasiantha F. W. Peirson 1925-3-26 s.n. Santa Barbara Side canyon at Gaviota Pass. 183 Comment
  RSA84957  Ribes speciosum F. W. Peirson 1925-3-26 5710 Santa Barbara Side canyon at Gaviota Pass. 183 Comment
  RSA85023  Polystichum munitum F. W. Peirson 1934-3-28 11083 Santa Barbara in Diablo canyon, Frye's Harbor, Santa Cruz Island. Comment
  RSA85936  Selaginella bigelovii Mabel B. Peirson 1927-4-14 7143 Santa Barbara Santa Cruz Island, Prisoners Cove. Comment
Read comments
Dec 30 2014
  RSA86801  Rosa californica Mabel Peirson 1934-3-26 11101 Santa Barbara Santa Cruz Island. Prisoners Cove. Comment
  PASA1107  Lotus salsuginosus Frank W. Peirson 1925-3-27 Santa Barbara Hills back of Santa Barbara 152 Comment
  PASA1906  Godetia bottae var. deflexa Frank W. Peirson 1920-7-29 Santa Barbara Gaviota Grade 60 Comment
  PASA2590  Thysanocarpus curvipes var. elegans Frank W. Peirson 1929-4-20 8316 Santa Barbara About two miles from Surf on the Lompoc Road Comment
  RSA0057562  Thysanocarpus curvipes var. elegans F. W. Peirson 1929-4-20 8316 Santa Barbara About 2 miles from Surf on the road to Lompoc. Comment
  RSA65655  Montia fontana F. W. Peirson 1925-3-21 5579 Santa Barbara Lewis Creek, near Lindsay, Tulare County. 213 Comment
  RSA66533  Athysanus pusillus F. W. Peirson 1927-4-12 7137 Santa Barbara Santa Cruz Island. Lady's Harbor, Comment
  RSA72284  Gilia clivorum F. W. Peirson 1934-3-25 11039 Santa Barbara Santa Cruz Island. West of canyon at Frye's Harbor, Comment
  RSA73322  Clarkia purpurea subsp. quadrivulnera F. W. Peirson 1929-5-18 8388 Santa Barbara 10 miles east of Lompoc on road to Buellton. 152 Comment
  RSA75692  Camissonia campestris subsp. campestris F. W. Peirson 1929-5-18 8397 Santa Barbara Cuyama Valley Road, 17 miles east of Coast Boulevard. Comment
  RSA79890  Solanum umbelliferum F. W. Peirson 1934-3-25 11048 Santa Barbara Santa Cruz Island. Frye's Harbor Comment
  RSA82225  Verbena lasiostachys F. W. Peirson 1920-7-28 4143 Santa Barbara Canada del Refugio. 0 Comment
  RSA84990  Ruppia cirrhosa F. W. Peirson 1920-7-28 2836 Santa Barbara Canada del Refugio, at sea level. 0 Comment
  RSA84992  Adiantum jordanii F. W. Peirson 1934-3-29 11089 Santa Barbara Santa Cruz Island. Top of sea-bluffs west of Inlet, Frye's Harbor. Comment
  RSA85014  Adiantum aleuticum F. W. Peirson 1934-3-29 11092 Santa Barbara Upper part of Frye Creek, above Frye's Harbor, Santa Cruz Island Comment
  RSA87038  Lupinus succulentus F. W. Peirson 1934-3-25 11043 Santa Barbara Santa Cruz Island. West of Fryes Harbor Comment
  RSA90316  Lotus dendroideus var. dendroideus F. W. Peirson 1934-3-26 11052 Santa Barbara Santa Cruz Island. Frye's Harbor, lower canyon Comment
  RSA91482  Isolepis cernua F. W. Peirson 1929-4-20 8295 Santa Barbara El Capitan Camp Comment
  RSA91483  Schoenoplectus maritimus F. W. Peirson 1920-6-28 2849 Santa Barbara Canada del Refugio. Sea level. 0 Comment
  RSA91485  Isolepis cernua F. W. Peirson 1920-7-28 2211 Santa Barbara Canada del Refugio, at sea level. 0 Comment
  RSA91715  Gnaphalium ramosissimum F. W. Peirson 1925-3-26 5701 Santa Barbara Cebada Canyon. 183 Comment
  RSA92430  Coreopsis gigantea Mabel Peirson 1927-4-12 7122 Santa Barbara Santa Cruz Island. Lady's Harbor. 152 Comment
  RSA94620  Venegasia carpesioides F. W. Peirson 1925-3-26 5716 Santa Barbara El Capitan Camp, on seashore northwest of Santa Barbara Comment
  RSA97357  Bowlesia incana Mabel Peirson, F. W. Peirson 1927-4-12 7127 Santa Barbara Lady s Harbor, Santa Cruz Island Comment
  SD87573  Fragaria vesca Frank W. Peirson 1929-4-20 8326 Santa Barbara Divide west of Las Cruces, B.M. 927 ft. 283 Comment
  SD87757  Thysanocarpus curvipes subsp. elegans Frank W. Peirson 1929-4-20 8316 Santa Barbara Grassy hill slope, 2.0 miles inland from surf. Comment
  POM20552  Polygala californica F. W. Peirson 1923-6-29 s.n. Santa Cruz Santa Cruz Mountains Comment
  RSA73138  Navarretia squarrosa F. W. Peirson 1925-8-3 6331 Santa Cruz Near San Lorenzo River about 1 mile from Boulder Comment
  RSA77235  Eriodictyon californicum F. W. Peirson 1912-1 988 Santa Cruz Santa Cruz Mtns. Comment
  RSA77707  Ceanothus papillosus F. W. Peirson 1912-6-28 737 Santa Cruz Santa Cruz Mts Comment
  RSA86949  Corylus cornuta var. californica F. W. Peirson 1925-8-4 6335 Santa Cruz San Lorenzo River about 1 mile from Boulder. Comment
  POM20550  Navarretia squarrosa F. W. Peirson 1923-6-28 3810 Santa Cruz 5 miles south of Watsonville Comment
  RSA76932  Euonymus occidentalis F. W. Peirson 1912-6-28 2050 Santa Cruz State Park, Santa Cruz Comment
  RSA90457  Lathyrus torreyi F. W. Peirson 1923-6-29 3628 Santa Cruz Santa Cruz Mts. Comment
  JEPS61031  Plagiobothrys hispidulus Frank W. Peirson 1932-7-9 10290 a Shasta Burney Spring 1432 Comment
  POM203394  Horkelia tridentata subsp. tridentata F. W. Peirson 1932-7-14 10169 Shasta Eiler Butte, Thousand-Lake Basin 1951 Comment
  RSA65956  Eriogonum umbellatum var. polyanthum F. W. Peirson 1932-7-19 10343 Shasta Mt. Lassen. 1829 Comment
  RSA80107  Mimulus nanus var. mephiticus F. W. Peirson 1932-7-16 10309 Shasta Below old log cabin and along the road; Burney Spring. 1433 Comment
  RSA82242  Castilleja applegatei subsp. pinetorum F. W. Peirson 1932-7-14 10417 Shasta East of Lake Eiler, Thousand-Lake Basin. 1951 Comment
  RSA86828  Rubus leucodermis F. W. Peirson 1932-7-13 10165 Shasta W of Red Crater, Thousand Lake Basin. 1951 Comment
  UC483081  Salix lemmonii Frank W. Peirson 1932-7-12 10132 b Shasta 1000-Lake slope of Red Crater Comment
  UC501430  Collomia grandiflora Frank W. Peirson 1932-7-16 10308 Shasta top of wooded slope behind camp Burney Spring 1432 Comment
  UC501432  Scutellaria antirrhinoides Frank W. Peirson 1932-7-17 10327 Shasta Goose Valley, Wallace Ranch Goose Valley; , Wallace Ranch 914 Comment
  UC501433  Cycladenia humilis var. humilis Frank W. Peirson 1932-7-12 10197 Shasta s. of Burney (along rim of Red Crater); 1000-Lake Basin, Red Crater 2072 Comment
  UC501435  Stachys ajugoides var. ajugoides Frank W. Peirson 1932-7-17 10319 Shasta Wallace Ranch Goose Valley 914 Comment
  UC501472  Epilobium hallianum Frank W. Peirson 1932-7-14 10187 Shasta w Lake Eiler (s of Burney); 1000-Lake Basin 1950 Comment
  UC501473  Scutellaria nana Frank W. Peirson 1932-7-9 10283 Shasta Burney Springs 1432 Comment
  UC501537  Silene douglasii Frank W. Peirson 1932-7-11 10144 Shasta s Burney (1000-Lake Basin, Interlake region); 1000-Lake Basin, s of Burney 1950 Comment
  UC501577  Trifolium kingii var. productum Frank W. Peirson 1932-7-13 10177 Shasta s Burney (1000-Lake Basin) 1950 Comment
  UC501616  Calochortus nudus Frank W. Peirson 1932-7-12 10130 Shasta s of Burney; 1000-Lake Basin 1950 Comment
  CAS-BOT-BC230832  Trifolium productum Frank W. Peirson 1932-7-10 10177 Shasta 1000-Lake Basin 1950 Comment
  CAS-BOT-BC295870  Arnica dealbata Frank W. Peirson 1926-6-23 6833 Shasta Trail from Drakesbad to Lassen Peak, Lassen National Park Comment
  CAS-BOT-BC412899  Aconogonon davisiae Frank W. Peirson 1926-6-23 6841 Shasta In central and upper parts of trail to summit of Lassen Peak, Lassen National Park Comment
  CAS-BOT-BC60757  Physaria occidentalis Frank W. Peirson 1926-6-23 6837 Shasta Trail to summit of Lassen Peak. Upper part of trail. Comment
  POM203542  Hesperolinon micranthum F. W. Peirson 1932-7-16 s.n. Shasta Burney Spring 1433 Comment
  RSA0078640  Kopsiopsis strobilacea F. W. Peirson 1932-7-11 10221 Shasta South of Mt. Magee, Thousand-Lake Basin. 2255 Comment
  RSA0125964  Boechera F. W. Peirson 1932-7-12 10154 Shasta Rim of Red Crater. Thousand-Lake Basin. 1982 Comment
  RSA69279  Maianthemum racemosum subsp. amplexicaule Frank W. Peirson 1932-7-14 10128 Shasta Base of Eiler Butte (the elevation east of Lake Eiler), Thousand-Lake Basin 1951 Comment
  RSA69504  Luzula comosa var. laxa F. W. Peirson 1932-7-12 10124 Shasta Thousand-Lake Basin. 1951 Comment
  RSA69600  Sagittaria cuneata F. W. Peirson 1932-7-14 10105 Shasta Thousand-Lake Basin. 1951 Comment
  RSA69713  Mentzelia dispersa F. W. Peirson 1932-7-14 10186 Shasta On slope near south end of Lake Eiler, Thousand-Lake Basin. 1951 Comment
  RSA69850  Platanthera leucostachys Frank W. Peirson 1932-7-17 10318 Shasta Wallace Ranch. Goose Valley. 915 Comment
  RSA70448  Allium campanulatum F. W. Peirson 1932-7-12 10129 Shasta Trail below camp; Thousand-Lake Basin. 1951 Comment
  RSA72651  Helianthella californica var. nevadensis F. W. Peirson 1932-7-16 10301 Shasta On trail to Thousand-Lake Basin. 1524 Comment
  RSA78643  Asarum hartwegii F. W. Peirson 1932-7-14 13546 Shasta 1000-Lake Basin, Growing near camp on Lake Eiler 1951 Comment
  RSA79464  Collinsia torreyi var. latifolia F. W. Peirson 1932-7-9 10295 Shasta Burney Spring. 1433 Comment
  RSA87185  Lupinus angustiflorus F. W. Peirson 1932-7-19 10344 Shasta Mt. Lassen, Mt. Lassen National Park. 1829 Comment
  RSA88846  Carex subfusca F. W. Peirson 1932-7-9 10865 Shasta Below Burney Spring. 1433 Comment
  RSA91347  Lupinus leucophyllus F. W. Peirson 1932-7-9 10279 Shasta Burney Spring. 1433 Comment
  RSA92085  Eleocharis acicularis var. acicularis F. W. Peirson 1932-7-16 10108 Shasta Near camp at Thousand-Lakes Basin 1951 Comment
  RSA93239  Aster occidentalis var. occidentalis F. W. Peirson 1932-7-12 10230 Shasta Along shore of Lake Eiler. Thousand-Lake Basin. 1951 Comment
  RSA94622  Arnica dealbata F. W. Peirson 1932-7-14 10236 Shasta Thousand-Lake Basin. 1951 Comment
  RSA94623  Whitneya dealbata F. W. Peirson 1926-6-23 6833 Shasta Trail to summit of Lassen Peak, Lassen National Park Comment
  RSA95166  Hieracium scouleri F. W. Peirson 1932-7-9 10296 Shasta Burney Spring. 1433 Comment
  RSA99347  Sambucus microbotrys F. W. Peirson 1932-7-14 10227 Shasta Eiler Butte, Thousand-Lake Basin 1951 Comment
  CAS-BOT-BC265198  Eriogonum umbellatum var. nevadense Frank W. Peirson 1923-7-19 3711 Siskiyou Near Bray Comment
  RSA73296  Linanthus pungens subsp. hookeri F. W. Peirson 1923-7-19 3809 Siskiyou Road crossing over Whitney Creek, foot of Mt. Shasta Comment
  PASA1715  Erigeron inornatus Frank W. Peirson 1923-7-20 Siskiyou 2 miles below Whitney Creek on the road to Weed Comment
  RSA66832  Thelypodium laciniatum F. W. Peirson 1923-7-19 3734 Siskiyou Laird s Landing. Comment
  RSA74837  Phacelia linearis F. W. Peirson 1923-7-19 3818 Siskiyou 20 miles north of Bray. Comment
  RSA77576  Lithospermum ruderale F. W. Peirson 1923-7-20 3823 Siskiyou Whitney Creek, Shasta Region. Comment
  RSA93191  Erigeron elegantulus F. W. Peirson 1923-7-19 3873 Siskiyou 17 miles north of Bray Comment
  SEINET10463313  Campanula prenanthoides Frank W. Peirson 1926-7-11 Peirson 7023 Siskiyou HALF WAY UP GRADE, GRADE W OF ETNA OR ETNA MILLS Comment
  SD87682  Phragmites australis subsp. americanus Frank W. Peirson 1925-9-26 6438 Solano Suisun Marshes, shallow water Comment
  SEINET6632142  Phragmites communis Frank W. Peirson 1925-1 6438 Solano Suisun Marshes. Comment
  RSA70138  Triteleia laxa F. W. Peirson, Mabel Peirson 1926-4-1 6547 Sonoma 6 miles south of Cloverdale. Comment
  RSA94176  Hemizonia clevelandii F. W. Peirson 1925-8-8 6347 Sonoma About 1 mile N of Santa Rosa. Comment
  CAS-BOT-BC100292  Blennosperma nanum var. nanum F. W. Peirson 1925-3-21 5581 Tulare Lewis Creek, near Lindsay 259 Comment
  JEPS10084  Castilleja attenuata Frank W. Peirson 1925-3-20 5545 Tulare near Richgrove Comment
  JEPS10523  Mimulus tricolor Frank W. Peirson 1925-3-21 5601 Tulare 3 mi s Lindsay Comment
  JEPS18805  Blennosperma nanum var. nanum Frank W. Peirson 1925-3-21 5581 Tulare near Lindsay; Lewis Creek 243 Comment
  JEPS20063  Meconella californica Frank W. Peirson 1926-3-21 5594 Tulare near Lindsay (Lewis Creek) 289 Comment
  JEPS50994  Moehringia macrophylla Frank W. Peirson 1936-5-30 11821 Tulare Balch Park 1920 Comment
  JEPS5742  Triglochin palustris F. W. Peirson 1919-8-12 1541 Tulare first stream s Big Arroyo (border of marsh); upper Kern River, Rattlesnake Creek Comment
  PASA1004  Collinsia bartsiifolia Frank W. Peirson 1925-3-20 Tulare 4 miles south of Porterville Comment
  PASA1980  Cryptantha flaccida Frank W. Peirson 1925-3-20 Tulare Near Richgrove Comment
  RSA65653  Claytonia palustris F. W. Peirson 1951-1 1860 Tulare Tule River, Sierra Nevada Comment
  RSA65711  Silene aperta F. W. Peirson 1908-7-23 613 Tulare Hockett Meadow region, Sequoia Nat l Park 2622 Comment
  RSA66073  Barbarea orthoceras F. W. Peirson 1908-7-23 s.n. Tulare In or near Hockett meadow, Sequoia National Park. Comment
  RSA69267  Chimaphila menziesii F. W. Peirson 1919-8-16 4726 Tulare Giant Forest, Sequoia National Park. 1982 Comment
  RSA69429  Swertia perennis F. W. Peirson 1908-7-20 877 Tulare Junction Meadow, Sierra Nevada. 2439 Comment
  RSA69501  Luzula comosa F. W. Peirson 1916-8-25 1648 Tulare Silver Lake, Little Kern River tributary, Sierra Nevada. 3201 Comment
  RSA69618  Triglochin palustris F. W. Peirson 1919-8-12 1541 Tulare Rattlesnake Creek, tributary of Kern River 2744 Comment
Read comments
Mar 1 2011
  RSA69775  Gentiana newberryi F. W. Peirson 1908-7-15 s.n. Tulare Rock Creek Cirques, Kern River region. Comment
  RSA69848  Platanthera leucostachys Frank W. Peirson 1908-7-13 s.n. Tulare Volcano Creek, Sierra Nevada Comment
  RSA69887  Fraxinus latifolia F. W. Peirson 1908-7-24 863 Tulare North Fork of Tule River, Sierra Nevada. Comment
  RSA71904  Ipomopsis aggregata subsp. bridgesii F. W. Peirson 1908-7-14 910 Tulare Volcano Creek, Sierra Nevada Comment
  RSA72107  Epilobium obcordatum F. W. Peirson 1908-7-15 764 Tulare Upper Rock Creek Comment
  RSA72184  Epilobium glaberrimum subsp. fastigiatum F. W. Peirson 1908-7-13 2306 Tulare Volcano Creek, tributary of Kern River, Sierra Nevada 2439 Comment
  RSA76975  Aesculus californica F. W. Peirson 1908-7-10 2051 Tulare Tule River, Sierra Nevada. Comment
  RSA80835  Pedicularis semibarbata F. W. Peirson 1936-5-30 11827 Tulare Balch Park. 1921 Comment
  RSA84207  Rhodiola integrifolia subsp. integrifolia F. W. Peirson 1919-8-8 1929 Tulare Twin Lake Cirque, Mt. Whitney Region. 3506 Comment
  RSA84485  Aconitum columbianum var. columbianum F. W. Peirson 1908-7-21 1870 Tulare Coyote Creek, Sierra Nevada. Comment
  RSA84490  Actaea rubra subsp. arguta F. W. Peirson 1908-7-13 1880 Tulare Volcano Creek, tributary to Kern River. 2439 Comment
  RSA85718  Potentilla drummondii F. W. Peirson 1911-8-9 2630 Tulare Whitney Meadows, Sierra Nevada. Comment
Read comments
Feb 4 2011
  RSA85765  Potentilla breweri var. breweri F. W. Peirson 1916-8-25 1970 Tulare Silver Lake, Little Kern Tributary, Sierra Nevada. 3201 Comment
  CAS-BOT-BC458200  Pleuricospora fimbriolata F. W. Peirson 1911-8-17 s.n. Tulare Giant Forest, Sierra Nevada 1981 Comment
  CAS-BOT-BC515675  Prosartes hookeri Frank W. Peirson 1936-5-30 11824 Tulare Balch Park 1920 Comment
  RSA0029870  Delphinium polycladon F. W. Peirson 1919-8-8 642 Tulare Twin Lake Cirque, Mt. Whitney Region. 3476 Comment
  RSA433746  Plectritis macrocera F. W. Peirson 1925-3-22 5614 Tulare Middle Fork of Tule River, Sierra Nevada. 457 Comment
  RSA65503  Minuartia douglasii F. W. Peirson 1925-3-21 5583 Tulare Lewis Creek near Lindsay 244 Comment
  RSA65601  Pseudostellaria jamesiana F. W. Peirson 1908-7-24 622 Tulare North Fork of Tule River, Sierra Nevada. Comment
  RSA68619  Calochortus venustus Frank W. Peirson 1911-6-26 1662 Tulare Hume Comment
  RSA68746  Disporum hookeri var. hookeri Frank W. Peirson 1936-5-30 11824 Tulare Balch Park, Sierra Nevada. 1921 Comment
  RSA69284  Tofieldia glutinosa subsp. occidentalis F. W. Peirson 1684 Tulare Silver Lake at 10500 ft.; Woods Creek; Junction Meadow Comment
  RSA70080  Platanthera sparsiflora Frank W. Peirson 1919-8-16 1701 Tulare Giant Forest, Sierra Nevada. 1982 Comment
  RSA70371  Calochortus luteus Frank W. Peirson s.n. Tulare Tule River, Sierra Nevada. Comment
  RSA71118  Calystegia malacophylla F. W. Peirson 1919-8-15 895 Tulare Trail from Redwood Meadow to Giant Forest, Sierra Nevada Comment
  RSA72219  Clarkia heterandra F. W. Peirson 1936-5-30 11818 Tulare Road to Balch Park, at water tank, about 4 miles above Control 1067 Comment
  RSA73080  Linanthus dichotomus subsp. dichotomus F. W. Peirson 1925-3-22 5615 Tulare Middle Fork of Tule River, Sierra Nevada. 457 Comment
  RSA77056  Hydrophyllum occidentale F. W. Peirson 1908-7-10 s.n. Tulare Tule River between the Forks and Nelson, Sierra Nevada. Comment
  RSA77756  Viola lobata F. W. Peirson 1908-7-24 742 Tulare North Fork of Tule River, Sierra Nevada. Comment
  RSA79757  Penstemon laetus var. laetus F. W. Peirson 1111 Tulare Tule River, Sierra Nevada. Comment
  RSA80701  Circaea alpina subsp. pacifica F. W. Peirson 1908-7-10 2089 Tulare Nelson, on Tule River, Sierra Nevada 1524 Comment
  RSA84279  Ranunculus alismifolius var. alismellus F. W. Peirson 1876 Tulare Sequoia National Park, Sierra Nevada. Comment
  RSA84855  Sedella pumila F. W. Peirson 1925-3-21 5575 Tulare Lewis Creek, near Lindsay. 213 Comment
  RSA86848  Prunus emarginata F. W. Peirson 1919-8-11 697 Tulare Funston Camp, Kern River, Sierra Nevada. 2043 Comment
  RSA86990  Cercis occidentalis F. W. Peirson 1925-3-22 5618 Tulare Middle Fork of Tule River, west base of Sierra Nevada. 457 Comment
  RSA90219  Astragalus bolanderi F. W. Peirson 1908-7-23 4142 Tulare South Fork of Kaweah River Comment
  RSA91167  Lessingia leptoclada F. W. Peirson 1908-7-10 1259 Tulare South Fork of Middle Fork of Tule Tiver, below Nelson Comment
  RSA91528  Trifolium willdenovii F. W. Peirson 1925-3-20 5548 Tulare Roadside between Ducor and Terrabella Comment
  RSA91665  Trisetum spicatum F. W. Peirson 1916-8-25 1602 Tulare Silver Lake, Little Kern tributary. 3201 Comment
  RSA91733  Achnatherum occidentale subsp. occidentale F. W. Peirson 1916-8-25 1584 Tulare Silver Lake, Little Kern River tributary, Sierra Nevada. 3201 Comment
  RSA92080  Micropus californicus var. californicus F. W. Peirson 1925-3-21 5557 Tulare Lewis Creek, near Lindsay. 213 Comment
  RSA92265  Achyrachaena mollis F. W. Peirson 1925-3-21 5587 Tulare Lewis Creek near Lindsay. 274 Comment
  RSA92681  Eriophyllum lanatum var. croceum F. W. Peirson 1908-7-9 1389 Tulare Tule River near 'The Forks,' below Nelson 762 Comment
  RSA92885  Populus fremontii subsp. fremontii F. W. Peirson 1925-3-21 5599 Tulare Lewis Creek near Lindsay. 274 Comment
  RSA93662  Solidago multiradiata F. W. Peirson 1908-7-23 1232 Tulare Near Hockett Meadow, Sequoia National Park. Comment
  RSA93665  Solidago canadensis subsp. elongata F. W. Peirson 1916-8-22 1231 Tulare Big Arroyo, Sierra Nevada. 2591 Comment
  RSA94841  Senecio triangularis F. W. Peirson 1908-7-19 1444 Tulare Junction Meadow, Kern River Canyon, Sierra Nevada. 2439 Comment
  RSA95083A  Microseris douglasii subsp. douglasii F. W. Peirson 1925-3-22 5605 Tulare About 4 miles below Springville. 244 Comment
  RSA95293  Rhamnus ilicifolia F. W. Peirson 1925-3-22 5610 Tulare Middle Fork Tule River 457 Comment
  RSA99376  Lonicera interrupta F. W. Peirson 1936-5-30 11816 Tulare About 4 miles above the control, on road to Balch Park. 1067 Comment
  PASA1359  Senecio covillei Frank W. Peirson 1930-8-14 Tuolumne Tuolumne Meadows 2590 Comment
  RSA65237  Eriogonum ovalifolium var. nivale F. W. Peirson 1927-8-3 7628 Tuolumne West slope of Mt. Dana, Sierra Nevada. 3506 Comment
  RSA85751  Potentilla flabellifolia F. W. Peirson 1927-8-3 7623 Tuolumne W slope of Mt. Dana, Sierra Nevada. 3277 Comment
  RSA0012551  Senecio scorzonella F. W. Peirson 1930-8-14 9219 Tuolumne Lower Tuolumne Meadow, Sierra Nevada. 2591 Comment
  RSA80072  Mimulus moschatus var. longiflorus F. W. Peirson 1935-7-25 11537 Tuolumne About 12 miles above Big Trees, North Fork, Stanislaus River Region. 1829 Comment
  RSA87157  Quercus vacciniifolia F. W. Peirson 1932-7-24 10401 Tuolumne Slopes above Relief Reservoir, Stanislaus River. 2287 Comment
  RSA91001  Erigeron petiolaris F. W. Peirson 1927-8-3 7624 Tuolumne W slope of Mt Dana. Sierra Nevada. 3354 Comment
  GH345029  Holodiscus microphyllus F. W. Peirson 1918-8-17 76 Unknown Near Summit Baldy, Mt. San Antonio. Comment
  GH346175  Rubus leucodermis F. W. Peirson 1919-6-16 494 Unknown South Fork Rock Creek. San Gabriel Mts. 1981 Comment
  GH346576  Prunus ilicifolia F. W. Peirson 1918-5-21 83 Unknown Arroyo Seco, San Gabriel Mts. 381 Comment
  GH367767  Epilobium canum F. W. Peirson 1918-10-21 280 Unknown West Fork San Gabriel River Comment
  GH386566  Brickellia microphylla F. W. Peirson 1921-10-22 2599 Unknown Head of Eaton Canyon Comment
  GH404012  Cryptantha humilis F. W. Peirson 1935-7-27 11599 Unknown Summit region south of Ebbets Pass 2804 Comment
  GH404013  Cryptantha humilis F. W. Peirson 1929-7-20 8508 Unknown Green Lake Valley, Bishop Creek Region 3291 Comment
  GH424871  Cryptantha glomeriflora F. W. Peirson 1935-7-16 Unknown Rock Creek Lake Basin, near Heart Lake Meadow Comment
  GH443060  Malacothrix similis F. W. Peirson 1925-5-19 5772 Unknown Hueneme Comment
  GH345961  Rosa californica F. W. Peirson 1918-7-9 84 Unknown San Antonio Canyon, San Gabriel Mts. 1341 Comment
  NY802375  Lotus argyraeus F. W. Peirson 2266 Unknown Santa Ana River 1981 Comment
  RSA0074798  Sedum obtusatum F. W. Peirson 1914-08 1928 Unknown [County: see notes field.] Piute Creek, Sierra Nevada. Comment
  RSA69227  Ledum glandulosum F. W. Peirson 1951-1 842 Unknown Sierra Nevada Comment
  RSA70154  Triteleia montana Gertrude B. Peirson 1914-07 1659 Unknown Tuolumne Meadow Region Comment
  RSA79806  Penstemon newberryi subsp. newberryi F. W. Peirson 1914-07 s.n. Unknown Snow Creek Trail, Sierra Nevada. Comment
  SEINET11981231  Viola purpurea F. W. Peirson 1918-1 118 Unknown Mt. San Antonio, San Gabriel Mts Comment
  CAS-BOT-BC281201  Melica stricta Frank W. Peirson 1923-6-10 3549 Ventura Seymour Creek, Mt Pinos region 1828 Comment
  CAS-BOT-BC401965  Gilia ochroleuca subsp. bizonata Frank W. Peirson 1923-6-10 3584 Ventura Seymour Creek, Mt. Pinos Region 1798 Comment
  PASA2202  Chaenactis xantiana Frank W. Peirson 1923-6-10 Ventura Seymour Creek, Mt. Pinos Region 1798 Comment
  PASA427  Rhamnus tomentella Frank W. Peirson 1922-7-29 Ventura Seymour Creek, Mt. Pinos Region 1828 Comment
  PASA850  Penstemon breviflorus Frank W. Peirson 1922-7-29 Ventura Seymour Creek, Mt. Pinos Region 1828 Comment
  RSA72663  Balsamorhiza deltoidea F. W. Peirson 1922-7-29 3232 Ventura Seymour Creek, Mt Pinos 1829 Comment
  CAS-BOT-BC241996  Eriogonum cinereum Frank W. Peirson 1920-7-28 4208 Ventura Coast, about 3 mi. W. of Ventura Comment
  CAS-BOT-BC69161  Antennaria dimorpha F. W. Peirson 1923-6-11 3562 Ventura Mt. Pinos, near summit 2682 Comment
  JEPS17213  Lewisia nevadensis Frank W. Peirson 1923-6-11 3594 Ventura about the Big Cienega, slopes of Mt. Pinos (vicinity of Kern - Ventura Co. line) 2560 Comment
Read comments
Aug 1 2016
  JEPS56692  Eriogonum molestum Frank W. Peirson 1923-6-11 3572 Ventura near South Fork; Mt. Pinos<?>, Seymour Creek 1905 Comment
  JEPS62729  Salvia leucophylla Frank W. Peirson 1925-4-19 5769 Ventura Sespe Canyon 228 Comment
  RSA0008276  Malacothrix similis F. W. Peirson 1925-4-19 5772 Ventura Hueneme Beach. Comment
  RSA0016272  Gilia ochroleuca subsp. bizonata F. W. Peirson 1922-7-30 9325 Ventura Mt. Pinos 2439 Comment
  RSA0076179  Orobanche californica subsp. feudgei Frank W. Peirson 1923-6-10 3573 Ventura Seymour Creek, Mt. Pinos region. 1798 Comment
  RSA69490  Mirabilis laevis var. crassifolia F. W. Peirson 1925-4-18 5764 Ventura Sespe Creek south base of Topatopa Mountains. 305 Comment
  RSA69715  Mentzelia dispersa F. W. Peirson 1923-6-11 3565 Ventura Mt. Pinos. 2287 Comment
  RSA71105  Calystegia macrostegia subsp. cyclostegia F. W. Peirson 1925-4-18 5755 Ventura Sespe Creek. 305 Comment
  RSA72004  Phlox diffusa subsp. subcarinata F. W. Peirson 1923-7-11 3563 Ventura Mt. Pinos. 2652 Comment
  RSA73082  Linanthus dichotomus subsp. dichotomus F. W. Peirson 1932-6-10 3558 Ventura Mount Pinos. Seymour Creek. 1799 Comment
  RSA75986  Eucrypta chrysanthemifolia F. W. Peirson 1925-4-18 5756 Ventura Sespe Creek south base of Topatopa Mountains. 305 Comment
  RSA85612  Ivesia santolinoides F. W. Peirson 1922-7-30 3233 Ventura Mount Pinos 2210 Comment
  RSA86741  Leymus condensatus F. W. Peirson 1918-5-5 1565 Ventura Roadside W of Simi Comment
  RSA87195  Lupinus excubitus var. hallii F. W. Peirson 1925-4-18 5752 Ventura Sespe Creek 305 Comment
  RSA87317  Galium bifolium F. W. Peirson 1923-6-11 3564 Ventura Mt. Pinos. 2561 Comment
  RSA90327  Lotus procumbens F. W. Peirson 1922-7-29 3235 Ventura Seymour Creek, Mt. Pinos 1951 Comment
  RSA90651  Chrysothamnus viscidiflorus subsp. viscidiflorus F. W. Peirson 1922-7-30 3247 Ventura Summit of Mt. Pinos 2689 Comment
Read comments
Nov 12 2010
  RSA90772  Astragalus whitneyi F. W. Peirson 1923-6-11 4750 Ventura summit of Mt. Pinos 2683 Comment
  RSA91191  Lupinus formosus F. W. Peirson 1923-6-11 3592 Ventura Seymour Creek, Mt. Pinos. 1905 Comment
  RSA92694  Salix exigua F. W. Peirson 1923-6-11 3568 Ventura Seymour Creek, Mt. Pinos. 1905 Comment
  RSA93207  Baccharis salicifolia F. W. Peirson 1925-4-18 5765 Ventura Sespe Creek 305 Comment
  RSA95283  Rhamnus tomentella subsp. tomentella F. W. Peirson 1922-7-29 3256 Ventura Seymour Creek, Mt Pinos 1829 Comment
  RSA97416  Tauschia parishii F. W. Peirson 1923-6-10 3578 Ventura Seymour Creek, Mt. Pinos. 1799 Comment
  RSA97427  Arceuthobium divaricatum F. W. Peirson 1922-7-29 3251 Ventura Seymour Creek, Mt. Pinos. 1829 Comment



  Copyright © 2019 Regents of the University of California — Updated 11 January 2019
0.13 processing seconds