Search Results — 2000 specimen records retrieved (1111 records with coordinates)
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(For large data reqests, please contact Jason Alexander, jason_alexander@berkeley.edu.)

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

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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  CAS-BOT-BC230097  Luzula orestera Frank W. Peirson s.n. Inyo Meadows south of Long Lake, Rock Creek Basin 3291 Comment
  CAS-BOT-BC339413  Lessingia glandulifera var. glandulifera Peirson No date on label 5099 San Bernardino Cajon Pass at road to Phelan. San Gabriel Mts. Comment
  POM15991  Sibbaldia procumbens F. W. Peirson 3492 San Bernardino Foxesee Creek. 2744 Comment
  RSA65491  Spergula arvensis F. W. Peirson 1869 Los Angeles Devil's Gate, Arroyo Seco Comment
  RSA66184  Eriogonum molestum F. W. Peirson 1741 San Bernardino San Bernardino Mountains. Comment
  RSA68752  Limonium californicum F. W. Peirson 850 Los Angeles Long Beach. Comment
  RSA69330A  Rhododendron occidentale var. californicum F. W. Peirson 843 Riverside Fruiting specimen from San Jacinto Mtns. Comment
  RSA72084  Phlox gracilis F. W. Peirson s.n. Los Angeles Devil's Gate, Arroyo Seco Comment
  RSA66597  Rorippa curvisiliqua F. W. Peirson 1906 Los Angeles Playa del Rey. Comment
  RSA69964  Abronia umbellata F. W. Peirson 1843 Los Angeles Long Beach Comment
  RSA79757  Penstemon laetus var. laetus F. W. Peirson 1111 Tulare Tule River, Sierra Nevada. Comment
  RSA79857  Penstemon speciosus F. W. Peirson 8496 Inyo Trail from South Lake to Green Lake, Bishop Creek. 3262 Comment
  RSA82277  Castilleja foliolosa F. W. Peirson 208 Los Angeles Foothills near Millard's Canyon, San Gabriel Mountains. Comment
  RSA84279  Ranunculus alismifolius var. alismellus F. W. Peirson 1876 Tulare Sequoia National Park, Sierra Nevada. Comment
  RSA90047  Lotus argophyllus var. argophyllus F. W. Peirson 95 Los Angeles summit of Mt. Wilson Comment
  RSA92417  Coreopsis bigelovii F. W. Peirson s.n. Los Angeles Benedicts Canyon, Santa Monica Mts Comment
  RSA94189  Hemizonia fasciculata F. W. Peirson s.n. Los Angeles Playa del Rey. Comment
  RSA97463  Perideridia parishii subsp. latifolia F. W. Peirson 817 Los Angeles Laurel Canyon, Santa Monica Mts. Comment
  RSA65343  Atriplex truncata F. W. Peirson 1904-8-22 1819 Los Angeles Playa del Rey, coast of Los Angeles Co. Comment
  RSA74922  Phacelia imbricata subsp. imbricata F. W. Peirson 1905-5-28 974 Los Angeles Rubio Wash above New York Ave., Pasadena 366 Comment
  RSA65446A  Lewisia rediviva F. W. Peirson 1905-7-14 37 Los Angeles South of summit of Mt. San Antonio, San Gabriel Mountains Comment
  RSA94677  Senecio mikanioides F. W. Peirson 1906-7-10 1434 Los Angeles Rustic Canyon, Santa Monica Mountains Comment
  RSA82522  Limosella acaulis F. W. Peirson 1906-8-14 857 San Bernardino Bluff Lake, San Bernardino Mountains. Comment
  POM9911  Limosella acaulis F. W. Peirson 1906-8-14 857 San Bernardino Bluff Lake, San Bernardino Mountains. 2439 Comment
  RSA87408  Lupinus confertus F. W. Peirson 1906-8-15 546 San Bernardino Bluff Lake, San Bernardino Mountains. 2287 Comment
  RSA91227  Lupinus elatus F. W. Peirson 1906-8-15 546 San Bernardino Bluff Lake, San Bernardino Mountains. 2287 Comment
  RSA65915  Eriogonum kennedyi var. alpigenum F. W. Peirson 1906-8-19 1753 San Bernardino Summit of San Gorgonio Peak 3491 Comment
  RSA85062  Adenostoma sparsifolium F. W. Peirson 1907-04 693 Riverside road below Strawberry valley. Comment
  RSA79452  Scrophularia villosa F. W. Peirson 1907-7-1 s.n. Los Angeles Catalina Island. Comment
  RSA94544  Packera ionophylla F. W. Peirson 1907-7-9 1591 Los Angeles Pine Flats at the headwaters of the Tujunga 1677 Comment
  RSA71113  Convolvulus simulans F. W. Peirson 1908-4-18 4253 Los Angeles Point Fermin Comment
  RSA71887  Gilia capitata subsp. abrotanifolia F. W. Peirson 1908-7-9 929 Tulare Tule River Comment
  RSA74776  Phacelia purpusii F. W. Peirson 1908-7-9 977 Tulare Tule River. Comment
  RSA85788  Ivesia unguiculata F. W. Peirson 1908-7-10 1960 Tulare Tule River. Comment
  RSA70129  Brodiaea coronaria F. W. Peirson 1908-7-10 1660 Tulare Tule River. Comment
  RSA90408  Lotus oblongifolius var. cupreus F. W. Peirson 1908-7-10 2007 Tulare Tule River. Comment
  RSA71883  Gilia leptantha subsp. purpusii F. W. Peirson 1908-7-11 127 Kern Little Kern River, Southern Sierra Nevada. Comment
  RSA66067  Rorippa curvisiliqua F. W. Peirson 1908-7-12 1908 Kern Lower Kern River, Sierrra Nevada. Comment
  RSA72209  Oenothera xylocarpa F. W. Peirson 1908-7-13 783 Tulare Volcano Creek, Sierra Nevada. Comment
  RSA87236  Lupinus culbertsonii subsp. hypolasius F. W. Peirson 1908-7-13 527 Tulare Volcano Creek, Sierra Nevada. Comment
  RSA93968  Pyrrocoma apargioides F. W. Peirson 1908-7-13 1236 Tulare Volcano Creek, Sierra Nevada. Comment
  RSA92614  Salix arctica F. W. Peirson 1908-7-16 718 a Tulare Rock Creek Cirque. Comment
Read comments
Mar 1 2013
  RSA69399  Thalictrum sparsiflorum F. W. Peirson 1908-7-17 644 Tulare Crabtree Meadows, Sierra Nevada 3149 Comment
  RSA0080479  Pyrola dentata F. W. Peirson 1908-7-19 826 Tulare Upper Kern River Canyon. Comment
  RSA73671  Leptosiphon pachyphyllus F. W. Peirson 1908-7-23 941 Inyo Coyote Pass, Sierra Nevada Comment
  RSA83968  Saxifraga nidifica F. W. Peirson 1908-7-23 1938 Tulare Sequoia National Park. Sierra Nevada. Comment
  RSA90219  Astragalus bolanderi F. W. Peirson 1908-7-23 4142 Tulare South Fork of Kaweah River Comment
  RSA83442  Lycopus americanus F. W. Peirson 1908-9-2 1075 Los Angeles Banks of Rio Hondo, El Monte. Comment
  RSA97447  Phoradendron pauciflorum F. W. Peirson 1909-08 1718 San Bernardino on Abies concolor; South Fork of Santa Ana River. Comment
  CAS-BOT-BC217404  Gentiana fremontii Frank W. Peirson 1909-8-10 869 San Bernardino South Fork Santa Ana, San Bernardino Mountains 2438 Comment
  RSA79790  Cryptantha confertiflora F. W. Peirson 1910-7-20 1034 Mono Near Mono Lake. 2134 Comment
  RSA0011821  Shepherdia argentea F. W. Peirson 1910-7-21 2078 Mono Along stream near Farrington's, Mono Valley. Comment
  RSA84427  Aquilegia pubescens F. W. Peirson 1910-7-26 631 Tuolumne Mt. Dana, Seirra Nevada. Comment
  RSA90442  Astragalus kentrophyta var. danaus F. W. Peirson 1910-7-26 595 Tuolumne Mt. Dana, Seirra nevada, Tuolumne Co. California Comment
  RSA92269  Calycadenia mollis F. W. Peirson 1910-8-12 1349 Tuolumne Near Hogdon Ranch 1418 Comment
  RSA65791  Cleomella obtusifolia F. W. Peirson 1911-1 1921 Inyo Owens Valley. Comment
  RSA92187  Lagophylla congesta F. W. Peirson 1911-1 1357 Unknown Sierra Nevada. Comment
  RSA79455  Scrophularia californica F. W. Peirson 1911-04 191 Los Angeles Laurel Canyon. Comment
  RSA69718  Mentzelia crocea F. W. Peirson 1911-7-29 s.n. Fresno Trail to Summit Meadow, Sierra Nevada. [county not specified] Comment
Read comments
Dec 18 2015
  RSA83948  Saxifraga tolmiei F. W. Peirson 1911-8-3 1944 Fresno Rae Lake, Sierra Nevada. 3232 Comment
  RSA65576  Minuartia nuttallii subsp. gracilis F. W. Peirson 1911-8-8 624 Inyo Cottonwood Creek, Sierra Nevada. Comment
  RSA73113  Navarretia breweri F. W. Peirson 1911-8-8 927 Inyo In vicinity of Horseshoe Meadow, Cottonwood Creek, east side of Sierra Nevada Comment
  RSA77803  Hackelia sharsmithii F. W. Peirson 1911-8-8 1010 Inyo In vicinity of Horseshoe Meadow, Cottonwood Creek, east side of Sierra Nevada Comment
  RSA80043  Castilleja praeterita F. W. Peirson 1911-8-8 s.n. Tulare Cottonwood Pass, Sierra Nevada. Comment
  RSA79755  Penstemon deustus subsp. deustus F. W. Peirson 1912-1 1118 Santa Cruz Santa Cruz Mtns. Comment
Read comments
Apr 25 2016
  RSA65854  Polygonum paronychia F. W. Peirson 1912-6-27 1794 Monterey Monterey. Comment
  RSA72259  Camissonia cheiranthifolia subsp. cheiranthifolia F. W. Peirson 1912-6-27 788 Monterey Monterey coast Comment
  RSA66488  Eschscholzia californica subsp. californica F. W. Peirson 1912-6-28 1887 Santa Cruz Santa Cruz. Comment
  RSA77707  Ceanothus papillosus F. W. Peirson 1912-6-28 737 Santa Cruz Santa Cruz Mts Comment
  RSA92886  Populus fremontii subsp. fremontii F. W. Peirson 1912-6-28 s.n. Santa Cruz Santa Cruz. Comment
  RSA77748  Viola ocellata F. W. Peirson 1912-6-29 743 Santa Cruz Santa Cruz Mts. Comment
  RSA85458  Vancouveria planipetala F. W. Peirson 1912-6-29 1882 Santa Cruz Santa Cruz Mts. Comment
  RSA68805  Delphinium nudicaule F. W. Peirson 1912-6-29 634 Santa Cruz State Park, Santa Cruz Mts Comment
  RSA71930  Collomia diversifolia F. W. Peirson 1912-07 914 Marin Mt. Tamalpais Comment
  RSA73144  Navarretia mellita Mabel Peirson 1912-07 s.n. Marin Mt. Tamalpais Comment
  RSA94494  Arnica discoidea Mabel Peirson 1912-07 1418 Marin Mt. Tamalpais Comment
  RSA0101658  Botrychium simplex var. compositum F. W. Peirson 1913-1 1517 Inyo Big Pine Creek, Sierra Nevada. 3398 Comment
  RSA0020504  Draba lemmonii F. W. Peirson 1913-8-11 655 Fresno Bubbs Creek, Sierra Nevada. Comment
  RSA77882  Tiquilia nuttallii F. W. Peirson 1913-8-22 993 Inyo Taboose Pass, Sierra Nevada. Comment
  RSA64760  Eriogonum thurberi F. W. Peirson 1914-04 1738 Riverside Whitewater at head of Coachella Valley. Comment
  RSA66743  Eschscholzia minutiflora F. W. Peirson 1914-04 1886 Riverside Whitewater, Nw corner of Colorado Desert, River Co. Comment
  RSA77839  Larrea tridentata F. W. Peirson 1914-04 2027 Riverside Whitewater, Colorado Desert. Comment
  RSA77890  Tiquilia plicata F. W. Peirson 1914-04 992 a Riverside Whitewater east of Beaumont. Comment
  RSA93957  Hymenoclea salsola F. W. Peirson 1914-04 2494 Riverside Whitewater at head of Coachella Valley. Comment
  RSA69602  Sagittaria latifolia F. W. Peirson 1914-4-27 1545 Inyo Bishop. Comment
  RSA0074798  Sedum obtusatum F. W. Peirson 1914-08 1928 Unknown [County: see notes field.] Piute Creek, Sierra Nevada. Comment
  RSA69454  Juncus saximontanus F. W. Peirson 1914-08 1641 Fresno Soth Fork of San Joaquin River. Comment
  CAS-BOT-BC181168  Minuartia rubella Frank W. Peirson 1914-8-3 625 Inyo S. Fk. Big Pine Creek 2590 Comment
  RSA79770  Cryptantha confertiflora F. W. Peirson 1914-8-3 996 Inyo Big Pine Creek, Owens Valley. 2668 Comment
  RSA84976  Potamogeton gramineus F. W. Peirson 1914-8-9 1538 Fresno Florence Lake, Sierra Nevada. Comment
  RSA77802  Hackelia mundula F. W. Peirson 1914-8-13 1007 Fresno Fish Creek, San Joaquin Tributary, Sierra Nevada Comment
  RSA71853  Collomia linearis F. W. Peirson 1914-8-14 4194 Madera Devil's Post Pile 2287 Comment
  RSA0013780  Nuphar lutea subsp. polysepala F. W. Peirson 1914-8-15 1881 Madera Devils Post Pile, Sierra Nevada 2317 Comment
  RSA88864  Carex raynoldsii F. W. Peirson 1914-8-15 1622 Madera Devils Post Pile. Sierra Nevada. 2332 Comment
  RSA92105  Cyperus squarrosus F. W. Peirson 1914-8-15 1610 Madera Devils Post Pile. Sierra Nevada. 2332 Comment
  RSA93043  Erigeron peregrinus subsp. callianthemus F. W. Peirson 1914-8-15 1293 Madera Devils Post Pile. Sierra Nevada. 2332 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
  RSA0011238  Vicia americana subsp. americana F. W. Peirson 1914-8-25 2013 Mono Crooked Creek, upper part of Volcanic Tableland. 2043 Comment
  RSA65912  Eriogonum nidularium F. W. Peirson 1914-8-26 1742 Mono Volcanic Tableland east of Long Valley Comment
  RSA75364  Camissonia boothii subsp. desertorum F. W. Peirson 1914-8-26 794 Mono Volcanic Tableland, Owens Valley Comment
  RSA68620  Calochortus weedii Frank W. Peirson 1915-6-27 1663 San Diego Torrey Pines near La Jolla. Comment
  RSA87043  Lupinus arizonicus F. W. Peirson 1916-04 542 Riverside Region of Palm Springs. Comment
  RSA83939  Ranunculus uncinatus var. parviflorus F. W. Peirson 1916-7-4 1873 San Bernardino Green Valley, San Bernardino Mts, alt 6750ft. 2058 Comment
  RSA72114  Epilobium brachycarpum F. W. Peirson 1916-7-6 2267 San Bernardino Bear Lake; San Bernardino Mountains. 2058 Comment
  RSA74504  Phacelia mohavensis F. W. Peirson 1916-7-6 961 San Bernardino Bear Lake. San Bernardino Mts. Comment
  RSA68965  Plantago purshii var. oblonga F. W. Peirson 1916-7-8 1180 San Bernardino Near western end of Baldwin Lake. San Bernardino Mts Comment
  RSA71007  Cuscuta denticulata F. W. Peirson 1916-7-8 897 San Bernardino BoxS Springs near north base of San Bernardino Mtns. 1082 Comment
  RSA77883  Tiquilia nuttallii F. W. Peirson 1916-7-8 993 a San Bernardino Cushenbury Springs, north base of San Bernardino Mountains. Comment
  RSA82187  Salazaria mexicana F. W. Peirson 1916-7-8 498 San Bernardino Cushenbury Springs, north base of San Bernardino Mountains. Comment
  RSA72145  Gayophytum eriospermum F. W. Peirson 1916-08 797 Tulare Tule River. Comment
  RSA94401  Orochaenactis thysanocarpha F. W. Peirson 1916-8-14 1394 Tulare Lloyds Meadow. 1677 Comment
  RSA77485  Ceanothus pinetorum F. W. Peirson 1916-8-16 736 Tulare Upper Kern River Comment
  RSA90656  Chrysothamnus viscidiflorus subsp. viscidiflorus F. W. Peirson 1916-8-16 4049 Tulare Kern Lakes, Sierra Nevada Comment
  RSA72342  Epilobium canum subsp. latifolium F. W. Peirson 1916-8-22 757 Tulare Big Arroyo, Sierra Nevada 2439 Comment
  RSA85765  Potentilla breweri var. breweri F. W. Peirson 1916-8-25 1970 Tulare Silver Lake, Little Kern Tributary, Sierra Nevada. 3201 Comment
  RSA66346  Eriogonum nudum var. scapigerum F. W. Peirson 1916-8-25 1756 -a Unknown Silver Lake. Sierra Nevada. 3201 Comment
Read comments
Feb 6 2013
  RSA91488  Eriophorum crinigerum F. W. Peirson 1916-8-25 1615 Tulare Silver Lake, Little Kern River tributary, Sierra Nevada. 3201 Comment
  RSA97467  Oreonana clementis F. W. Peirson 1916-8-25 8604 Tulare Silver Lake, tributary to Little Kern river, Sierra Nevada 3201 Comment
  RSA79589  Plagiobothrys torreyi F. W. Peirson 1916-8-27 2736 Tulare Trail north from Quinn s Horsecamp 2591 Comment
  JEPS54868  Caesalpinia virgata Frank W. Peirson 1917-1 2 Inyo Independence Comment
  RSA95320  Sphaeralcea ambigua subsp. ambigua F. W. Peirson 1917-4-1 2065 Riverside Andreas Canyon near Palm Springs. Comment
  RSA69418  Eustoma exaltatum F. W. Peirson 1917-5-1 880 Los Angeles Topanga Canyon, Santa Monica Mountains. Comment
  RSA67358  Lepidium flavum F. W. Peirson 1917-5-13 676 San Bernardino Mojave Desert. Comment
  RSA77048  Sphaeralcea emoryi subsp. variabilis F. W. Peirson 1917-5-13 776 Los Angeles Palmdale, SW Mojave Desert. Comment
  RSA73005  Linanthus aureus F. W. Peirson 1917-5-13 947 Los Angeles West of Little Rock. Comment
  RSA0074823  Sedum obtusatum F. W. Peirson 1917-8-2 1927 Fresno Grouse Meadows, Sierra Nevada, Kings Canyon National Park. 2515 Comment
  RSA69233  Gaultheria humifusa F. W. Peirson 1917-8-12 844 Fresno Grouse Meadow Middle Fork of Kings River, Sierra Nevada. 2515 Comment
  RSA0011683  Drosera rotundifolia F. W. Peirson 1917-8-12 1936 Fresno Grouse Meadows, Middle Fork of Kings River. 2515 Comment
  RSA85251  Petrophytum caespitosum subsp. acuminatum F. W. Peirson 1917-8-12 1955 Fresno LeConte Canyon, below Grouse Meadow, Middle Fork of Kings River 2317 Comment
  RSA90983  Erigeron elmeri F. W. Peirson 1917-8-12 1287 Fresno Grouse Meadows, Middle Fork Kings River, Sierra Nevada 2515 Comment
  RSA66008  Eriogonum rosense F. W. Peirson 1917-8-20 1752 Inyo Sierra Nevada: Green Lake region. Coyote Creek Promontory 3354 Comment
  RSA90430  Oxytropis borealis var. viscida F. W. Peirson 1917-8-20 599 Inyo Sierra Nevada: Green Lake region. Coyote Creek Promontory 3352 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
  JEPS59863  Salsola tragus Frank W. Peirson 1918-1 7 Riverside e. base Mt. San Jacinto, Andreas Canyon Comment
  RSA67347  Lepidium nitidum F. W. Peirson 1918-03 2327 Riverside Whitewater Grade, NW corner of Colorado Desert. Comment
  RSA91580  Schoenoplectus maritimus F. W. Peirson 1918-03 1618 Riverside Mecca. Comment
  RSA93765  Geraea canescens F. W. Peirson 1918-03 1333 Riverside Irrigated field near Indio. Comment
  RSA94111  Peucephyllum schottii F. W. Peirson 1918-03 1244 Riverside SE side of desert embankment at Palm Springs and almost opposite Andreas Canyon. Comment
  RSA92044  Bromus hordeaceus F. W. Peirson 1918-04 4198 Los Angeles Altadena. Comment
  RSA87063  Hordeum brachyantherum F. W. Peirson 1918-4-28 1606 Los Angeles Road east and south of El Monte. Comment
  RSA80191  Plagiobothrys canescens F. W. Peirson 1918-4-28 2735 Los Angeles Turnbull Canyon near Whittier, Puente Hills. Comment
  RSA90939  Trifolium fucatum F. W. Peirson 1918-4-28 554 Los Angeles Turnbull Canyon near Whittier, Puente Hills. Comment
  RSA92920  Lasthenia californica F. W. Peirson 1918-4-28 1371 Los Angeles Summit of Turnbull Canyon, hills above Whittier Comment
  RSA91843  Sporobolus airoides F. W. Peirson 1918-5-5 1588 Ventura Roadside W of Simi Comment
  JEPS55284  Lathyrus vestitus var. vestitus Frank W. Peirson 1918-5-12 104 Los Angeles Arroyo Seco San Gabriel Mts. 396 Comment
  JEPS47656  Lithophragma affine Frank W. Peirson 1918-5-19 69 Los Angeles Millard's Canyon; San Gabriel Mountains, Millard's Canyon 609 Comment
  JEPS60584  Delphinium patens subsp. hepaticoideum Frank W. Peirson 1918-5-19 50 Los Angeles Millards Canyon 609 Comment
  RSA66788  Thysanocarpus laciniatus F. W. Peirson 1918-5-19 59 Los Angeles Millard's Canyon, south base of San Gabriel Mts. Comment
  UCD45456  Quercus chrysolepis F. W. Peirson 1918-5-19 16 Los Angeles Echo Mountain, 3400 ft. San Gabriel Range. 1036 Comment
  RSA80465  Mimulus guttatus F. W. Peirson 1918-5-19 197 Los Angeles Trail to Dawn Station above Dawn Mine, San Gabriel Mountains. Comment
  GH349645  Ceanothus integerrimus F. W. Peirson 1918-5-26 111 Unknown Toll Road, Mt. Wilson, San Gabriel Range 1143 Comment
  JEPS65003  Lupinus bicolor Frank W. Peirson 1918-5-26 91 Los Angeles Henninger Flats San Gabriel Mts., Henninger Flats 868 Comment
  JEPS31579  Camissoniopsis bistorta F. W. Peirson 1918-5-26 129 Los Angeles Henniger Flats San Gabriel Mts. 868 Comment
  JEPS31794  Camissoniopsis hirtella F. W. Peirson 1918-5-26 128 Los Angeles Henniger Flats San Gabriel Mts. 868 Comment
  JEPS43186  Claytonia parviflora subsp. parviflora F. W. Peirson 1918-5-27 35 Los Angeles Henninger Flats 868 Comment
  JEPS9474  Galium angustifolium subsp. gabrielense F. W. Peirson 1918-5-27 216 San Bernardino San Antonio Canyon 1371 Comment
  GH345390  Adenostoma fasciculatum F. W. Peirson 1918-6-1 78 Unknown Mt. Wilson Toll Road. 609 Comment
  JEPS11538  Mimulus guttatus Frank W. Peirson 1918-6-1 198 Los Angeles Eaton Canyon San Gabriel Mountains 640 Comment
  JEPS44779  Adenostoma fasciculatum Frank W. Peirson 1918-6-1 78 Los Angeles Mt. Wilson Toll Rd. 609 Comment
  RSA0117330  Collinsia parryi F. W. Peirson 1918-6-1 193 Los Angeles Eaton Canyon, in the San Gabriel Mountains, northeast of Altadena 915 Comment
  JEPS55866  Lotus strigosus F. W. Peirson 1918-6-4 97 Los Angeles e of Rubio Canyon; San Gabriel Mts. 609 Comment
  RSA90858  Carex triquetra F. W. Peirson 1918-6-4 1635 Los Angeles Foothills east of Rubio Canyon 609 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
  SBBG28949  Lupinus elatus F. W. Peirson 1918-6-10 88 Los Angeles summit of San Gabriel Pk 1859 Comment
  JEPS11303  Nuttallanthus texanus Frank W. Peirson 1918-6-12 187 Los Angeles San Gabriel Mountains, Foothills e of Rubio Canyon Rubio Canyon; San Gabriel Mountains 609 Comment
  RSA75129  Nemacladus pinnatifidus F. W. Peirson 1918-6-12 219 Los Angeles In area recently burned over, in hills east of Rubio Canyon, San Gabriel Mts. 548 Comment
  JEPS41206  Mentzelia montana Frank W. Peirson 1918-6-12 120 Los Angeles Trail at Mt. Markham San Gabriel Mts., Mt. Markhkam 1645 Comment
  JEPS6992  Antirrhinum coulterianum Frank W. Peirson 1918-6-12 188 Los Angeles Rubio Canyon foothills Rubio Canyon; San Gabriel Mountains Comment
  RSA82190  Trichostema lanatum F. W. Peirson 1918-6-15 176 Los Angeles Mint Canyon below the Camp in the Oaks, northwest corner of San Gabriel Mts. Comment
  JEPS42852  Mentzelia laevicaulis var. laevicaulis F. W. Peirson 1918-6-16 121 Los Angeles San Gabriel Mts., Rock Creek Comment
  RSA66814  Stanleya pinnata var. pinnata F. W. Peirson 1918-6-16 292 Los Angeles Rock Creek, north slope of San Gabriel Mountains 1448 Comment
  RSA80391  Solanum umbelliferum F. W. Peirson 1918-6-16 186 Los Angeles Rock Creek, north slope of San Gabriel Mountains 1448 Comment
  JEPS51475  Arenaria macradenia Frank W. Peirson 1918-6-16 44 Los Angeles On the road w Acton Comment
  RSA73003  Leptosiphon aureus F. W. Peirson 1918-6-16 948 Los Angeles Summit of first grade up Mint Canyon, northwest base of San Gabriel Mts. 762 Comment
  RSA97442  Phoradendron bolleanum F. W. Peirson 1918-6-16 32 Los Angeles West of Acton, north base of San Gabriel Mts. 915 Comment
  JEPS27006  Caulanthus major Frank W. Peirson 1918-6-17 65 Los Angeles Rock Creek San Gabriel Mountains, Rock Creek 1676 Comment
  JEPS519  Allium monticola Frank W. Peirson 1918-6-17 267 Los Angeles Head of Rock Cr, Rock Cr. 1981 Comment
Read comments
Oct 16 2006
  JEPS39860  Rumex salicifolius var. salicifolius F. W. Peirson 1918-6-18 29 Los Angeles Lower Rock Creek San Gabriel Mts. 1219 Comment
  RSA95294  Rhamnus ilicifolia F. W. Peirson 1918-6-18 287 Los Angeles Devils Punch Bowl, Rock Creek, north base of San Gabriel Mts. at 4000 ft. 1220 Comment
  JEPS63184  Trichostema parishii Frank W. Peirson 1918-6-19 176 San Bernardino Cajon Comment
  UC35485  Amorpha californica var. californica F. W. Peirson 1918-6-19 85 San Bernardino Cajon Pass Comment
  JEPS11596  Penstemon spectabilis var. subviscosus F. W. Peirson 1918-6-30 206 Los Angeles Mt. Wilson Toll Road San Gabriel Mts, Mt. Wilson 1295 Comment
  JEPS27588  Gayophytum heterozygum F. W. Peirson 1918-6-30 130 Los Angeles Mt. Wilson San Gabriel Mountains (near summit) Comment
  JEPS47603  Allium burlewii Frank W. Peirson 1918-7-7 266 San Bernardino Summit Ontario Ridge Ontario Ridge 2621 Comment
  JEPS52508  Calyptridium umbellatum Frank W. Peirson 1918-7-7 34 San Bernardino Ontario Ridge 2621 Comment
  JEPS56308  Eriogonum saxatile Frank W. Peirson 1918-7-7 24 San Bernardino Icehouse Canyon 2286 Comment
  RSA70457  Allium burlewii F. W. Peirson 1918-7-7 266 San Bernardino Summit of Ontario Peak, San Gabriel Mts. 2621 Comment
  RSA87371  Agrostis idahoensis F. W. Peirson 1918-7-7 1576 San Bernardino Kellly's Cabin, Ontario Ridge, San Gabriel Mountains. 2500 Comment
  SD70418  Dudleya cymosa subsp. pumila Frank W. Peirson 1918-7-7 262 Los Angeles Ontario Ridge, San Gabriel Mountains. 2590 Comment
  UC530092  Agrostis idahoensis Frank W. Peirson 1918-7-7 1576 San Bernardino Kellys Cabin San Gabriel Mts., =San Antonio Mts., Ontario Ridge (Ontario Ridge, San Gabriel Mts.) 2499 Comment
  JEPS53127  Boechera platysperma Frank W. Peirson 1918-7-7 58 Los Angeles Ontario Ridge San Gabriel Mts. 2438 Comment
  JEPS2601 Image available Galium siccatum var. anotinum Frank W. Peirson 1918-7-8 215 Los Angeles Baldy San Gabriel Mountains, Mt. San Antonio; Mt. San Antonio (Baldy), Los Angeles Co. 2133 Comment
  JEPS2623 Image available Habenaria leucostachys var. virida F. W. Peirson 1918-7-8 12 Los Angeles San Antonio Canyon San Gabriel Mts.; San Antonio Canyon, San Gabriel Mts. 1828 Comment
  JEPS58687  Chrysolepis sempervirens Frank W. Peirson 1918-7-8 15 Los Angeles Baldy (= Mt. San Antonio); San Gabriel Mts. 2590 Comment
  RSA69846  Platanthera sparsiflora Frank W. Peirson 1918-7-8 12 San Bernardino San Antonio Canyon, San Gabriel Mountains, W San Bernardino [County] 1829 Comment
  JEPS51647  Argemone rotundata Frank W. Peirson 1918-7-9 55 Los Angeles San Gabriel Mountains, San Antonio Canyon San Antonio Canyon; San Gabriel Mountains, San Antonio Canyon 1981 Comment
  JEPS45050  Holodiscus discolor Frank W. Peirson 1918-7-13 75 Los Angeles Santa Anita Canyon, San Gabriel Mts. 914 Comment
  JEPS44911  Prunus virginiana var. demissa Frank W. Peirson 1918-7-17 82 Los Angeles Rock Creek; San Gabriel Mountains, Rock Creek 1524 Comment
  JEPS11453  Mimulus guttatus Frank W. Peirson 1918-8-6 259 Los Angeles old trail to Mt. Wilson; San Gabriel Mountains 838 Comment
  JEPS60559  Clematis ligusticifolia Frank W. Peirson 1918-8-16 52 Los Angeles San Antonio Canyon 1341 Comment
  JEPS62952  Stachys ajugoides var. rigida Frank W. Peirson 1918-8-16 179 Los Angeles San Antonio Canyon San Gabriel Mts. 1341 Comment
  GH345029  Holodiscus microphyllus F. W. Peirson 1918-8-17 76 Unknown Near Summit Baldy, Mt. San Antonio. Comment
  JEPS56588  Eriogonum nudum var. pauciflorum Frank W. Peirson 1918-8-17 20 Los Angeles San Antonio Canyon San Gabriel Mts. 1676 Comment
  JEPS43972  Oenothera elata subsp. hirsutissima Frank W. Peirson 1918-8-18 127 Los Angeles San Antonio Canyon San Gabriel Mts. 1341 Comment
  JEPS49954  Asclepias fascicularis Frank W. Peirson 1918-8-18 149 Los Angeles San Antonio Canyon; San Gabriel Mts. 1341 Comment
  JEPS57016  Eriogonum elongatum var. elongatum Frank W. Peirson 1918-9-7 19 Los Angeles Toll Road (automobile road up Mt. Wilson) Mt. Wilson Comment
  RSA93104  Corethrogyne filaginifolia var. filaginifolia F. W. Peirson 1918-9-15 229 Los Angeles summit of Lukens Peak Comment
  RSA95225  Stephanomeria cichoriacea F. W. Peirson 1918-9-15 249 Los Angeles Lukens Peak trail, San Gabriel Mountains. 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
  RSA70560  Croton californicus F. W. Peirson 1918-10-17 276 Los Angeles foot of Pacoima Canyon 457 Comment
  RSA90644  Hazardia squarrosa var. grindelioides F. W. Peirson 1918-10-26 227 Los Angeles Big Dalton Canyon, south base of San Gabriel Mts 732 Comment
  JEPS49339  Ribes indecorum Frank W. Peirson 1918-11-1 299 Los Angeles trail to Switzers (Arroyo Seco); San Gabriel Mts. 944 Comment
  RSA97443  Phoradendron macrophyllum F. W. Peirson 1918-11 1717 Los Angeles Above Camp Baldy, San Antonio Canyon, San Gabriel Mts. 1341 Comment
  RSA90888  Ericameria pinifolia F. W. Peirson 1918-11-25 2752 San Bernardino San Antonio Canyon, San Gabriel Mts. 1341 Comment
  JEPS40113  Umbellularia californica Frank W. Peirson 1919-1-25 312 Los Angeles San Gabriel Mountains, Arroyo Seco Arroyo Seco; San Gabriel Mountains, Arroyo Seco 381 Comment
  RSA91758  Gnaphalium californicum F. W. Peirson 1919-1-26 235 Los Angeles Hills east of Rubio Canyon 548 Comment
  JEPS13828  Salix lasiolepis Frank W. Peirson 1919-2-9 317 Los Angeles Fish Canyon; San Gabriel Mts., Fish Canyon Comment
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Dec 10 2014
  JEPS67674  Cryptantha intermedia Frank W. Peirson 1919-2-12 320 Los Angeles Arroyo Seco San Gabriel Mountains 457 Comment
  RSA82355  Scutellaria tuberosa F. W. Peirson 1919-3-11 178 Los Angeles Small Canyon east of Rubio Canyon south base of San Gabriel Mtns. at 1800 ft. 549 Comment
  JEPS53579  Erysimum capitatum var. capitatum Frank W. Peirson 1919-3-27 337 Los Angeles Arroyo Seco Canyon San Gabriel Mountains 411 Comment
  JEPS65495  Lupinus truncatus Frank W. Peirson 1919-3-27 360 Los Angeles Arroyo Seco Canyon San Gabriel Mts. 411 Comment
  RSA67367  Guillenia lasiophylla F. W. Peirson 1919-3-27 327 Los Angeles Foot of trail to Lukens Peak 609 Comment
  SD70410  Viola pedunculata Frank W. Peirson 1919-3-27 332 Los Angeles Foot of Lukens Peak trail, San Gabriel Mountains 579 Comment
  JEPS59731  Chenopodium californicum Frank W. Peirson 1919-3-29 348 Los Angeles Rubio Canyon San Gabriel Mountains 548 Comment
  JEPS64529  Populus fremontii subsp. fremontii Frank W. Peirson 1919-3-30 386 Los Angeles Big Tujunga Canyon; San Gabriel Mountains, Big Tujunga Canyon 441 Comment
  RSA74150  Phacelia tanacetifolia F. W. Peirson 1919-3-30 311 Los Angeles Tujunga Canyon, west end of San Gabriel Mountains. 457 Comment
  RSA91366  Melilotus albus F. W. Peirson 1919-3-30 354 Los Angeles Tujunga Canyon. West end of San Gabriel Mts. 427 Comment
  RSA92608  Salix exigua F. W. Peirson 1919-3-30 355 Los Angeles Tujunga Canyon, west end of San Gabriel Mountains 396 Comment
  JEPS38027  Quercus agrifolia Frank W. Peirson 1919-4-5 369 Los Angeles Mt. Wilson Toll Road San Gabriel Mountains Comment
  JEPS44509  Horkelia cuneata subsp. puberula Frank W. Peirson 1919-4-5 362 Los Angeles 1/4 mi below the mountains (Borders of Eaton Canyon); San Gabriel Mts., Eaton Canyon 365 Comment
  RSA85320  Ribes amarum F. W. Peirson 1919-4-5 316 Los Angeles Mt. Wilson Toll Road, S side of San Gabriel Mts 1067 Comment
  RSA87171  Quercus agrifolia var. agrifolia F. W. Peirson 1919-4-5 369 Los Angeles road to Mt. Wilson 457 Comment
  RSA72289  Gilia angelensis F. W. Peirson 1919-4-5 4706 Los Angeles Allen Ranch, Altadena. 366 Comment
  UCD91779  Poa secunda subsp. secunda F. W. Peirson 1919-4-12 1551 Riverside Tahquitz Camp, Palm Springs, Colorado Desert. Comment
  RSA75988  Eucrypta chrysanthemifolia var. bipinnatifida F. W. Peirson 1919-4-13 972 Riverside Tahquitz Canyon, near Palm Springs. Comment
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Sep 18 2011
  RSA76031  Pholistoma membranaceum F. W. Peirson 1919-4-13 981 Riverside Tahquitz Canyon stream, near Palm Springs. Comment
  RSA83467  Hyptis emoryi F. W. Peirson 1919-4-13 1078 Riverside first canyon east of Palm Canyon, Palm Springs region. Comment
  RSA77228  Ayenia compacta F. W. Peirson 1919-4-14 2069 Riverside Murray Canyon, near Palm Springs. Comment
  RSA93014  Lasthenia microglossa F. W. Peirson 1919-4-14 1376 Riverside Shelter of high wall of rock, Murray Canyon near Palm Springs. 488 Comment
  CAS-BOT-BC407620  Gilia ochroleuca subsp. exilis Frank W. Peirson 1919-4-15 921 Riverside Whitewater Grade above Cabazon Comment
  RSA72314  Gilia diegensis F. W. Peirson 1919-4-16 4133 San Bernardino South slope of Cajon Pass. 686 Comment
  RSA79853  Penstemon X parishii F. W. Peirson 1919-4-16 1107 San Bernardino Cajon Pass, west end of San Bernardino Mts. 686 Comment
  JEPS2128  Phacelia longipes Frank W. Peirson 1919-4-19 381 Los Angeles Pacoima Canyon San Gabriel Mountains 487 Comment
  JEPS43807  Saxifraga californica Frank W. Peirson 1919-4-19 373 Los Angeles Pacoima Canyon; San Gabriel Mountains, Pacoima Canyon 533 Comment
  JEPS65805  Trifolium ciliolatum Frank W. Peirson 1919-4-19 378 Los Angeles Pacoim Canyon San Gabriel Mtns 685 Comment
  RSA0039200  Thysanocarpus laciniatus F. W. Peirson 1919-4-19 5334 Los Angeles Pacoima Canyon, west end of San Gabriel Mts. 549 Comment
  RSA91500  Trifolium ciliolatum F. W. Peirson 1919-4-19 378 Los Angeles Pacoima Canyon; San Gabriel Mountains Comment
  JEPS12738  Sambucus mexicana Frank W. Peirson 1919-4-24 391 Los Angeles canyon e Rubio; San Gabriel Mountains 548 Comment
  JEPS52980  Berberis aquifolium var. dictyota Frank W. Peirson 1919-5-6 54 Los Angeles Eaton Canyon; San Gabriel Mts 609 Comment
  JEPS34715  Eriophyllum confertiflorum var. confertiflorum F. W. Peirson 1919-5-10 409 Los Angeles Arraster Canyon San Gabriel Mts., Arraster Canyon 838 Comment
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Aug 21 2014
  JEPS60620  Delphinium parishii subsp. parishii Frank W. Peirson 1919-5-10 419 Los Angeles Arraster Creek San Gabriel Mountains 914 Comment
  JEPS67675  Cryptantha intermedia Frank W. Peirson 1919-5-10 402 Los Angeles Arraster Creek San Gabriel Mountains 914 Comment
  JEPS69842  Leptodactylon californicum Frank W. Peirson 1919-5-10 401 Los Angeles Mt. Gleason; San Gabriel Mountains, Mt. Gleason 1371 Comment
  RSA65891  Centrostegia thurberi F. W. Peirson 1919-5-10 28 Los Angeles Arraster [Arrastre] Creek. North base of San Gabriel Mountains. 915 Comment
  RSA79598  Cryptantha circumscissa F. W. Peirson 1919-5-10 1001 Los Angeles Arraster [Arrastre] Creek, San Gabriel Mountains. 838 Comment
  RSA82280  Castilleja foliolosa F. W. Peirson 1919-5-10 430 Los Angeles Arraster [Arrastre] Creek. North base of San Gabriel Mountains. 915 Comment
  RSA73039  Linanthus dichotomus subsp. pattersonii F. W. Peirson 1919-5-10 393 Los Angeles Arraster [Arrastre] Creek. North base of San Gabriel Mountains 915 Comment
  RSA92645  Salix lasiolepis F. W. Peirson 1919-5-10 4281 Los Angeles Arraster [Arrastre] Creek, San Gabriel Mountains. 838 Comment
  SD87569  Cryptantha intermedia F. W. Peirson 1919-5-11 402 Los Angeles San Gabriel Mountains, Arraster 915 Comment
  RSA87166  Quercus durata var. gabrielensis F. W. Peirson 1919-5-14 1710 Los Angeles Eaton Canyon. 686 Comment
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Dec 19 2014
  RSA95120  Agoseris retrorsa F. W. Peirson 1919-5-14 2764 Los Angeles East trail to Mount Lowe. 1066 Comment
  JEPS273  Sanicula crassicaulis Frank W. Peirson 1919-5-18 431 Los Angeles San Gabriel Mountains, Monrovia Canyon Monrovia Canyon; San Gabriel Mountains, Monrovia Canyon 609 Comment
  JEPS43697  Clarkia bottae Frank W. Peirson 1919-5-18 432 Los Angeles Monrovia Canyon San Gabriel Mountains 304 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
  JEPS4580  Mimulus Frank W. Peirson 1919-5-18 434 Los Angeles hills e Monrovia Canyon; San Gabriel Mountains 457 Comment
  RSA65616  Cerastium glomeratum F. W. Peirson 1919-5-18 438 Los Angeles Hills east of Monrovia Canyon 457 Comment
  RSA97318  Lomatium lucidum F. W. Peirson 1919-5-18 801 Los Angeles trail from Monrovia Canyon to Fish Canyon 915 Comment
  PASA321  Malacothrix clevelandii Frank W. Peirson 1919-5-21 Los Angeles Arroyo Seco, San Gabriel Mts. 685 Comment
  PASA1101  Lotus oblongifolius Frank W. Peirson 1919-5-21 Los Angeles Arroyo Seco 548 Comment
  CAS-BOT-BC296957  Eriophyllum wallacei Frank W. Peirson 1919-5-30 346 Los Angeles Tujunga Canyon, west end of San Gabriel Mts. 426 Comment
  POM9940  Allium monticola F. W. Peirson 1919-6-4 3 San Bernardino Icehouse Canyon 1982 Comment
  JEPS39882  Rumex conglomeratus Frank W. Peirson 1919-6-5 463 Los Angeles San Antonio Canyon San Gabriel Mountains 1310 Comment
  POM9745  Galium angustifolium subsp. gabrielense F. W. Peirson 1919-6-7 7677 Los Angeles Cow Canyon divide, San Antonio Creek Region 1372 Comment
  RSA0005777  Galium siccatum var. anotinum F. W. Peirson 1919-6-7 215 Los Angeles Cow Canyon Divide, San Gabriel Mts. 1372 Comment
  JEPS53908  Stanleya pinnata Frank W. Peirson 1919-6-13 292 Los Angeles Rock Creek San Gabriel Mountains, Rock Creek 1295 Comment
  RSA93903  Encelia actoni F. W. Peirson 1919-6-13 484 Los Angeles Large colony on south side of canyon of Rock Creek. 1296 Comment
  JEPS31580  Camissoniopsis pallida subsp. pallida Frank W. Peirson 1919-6-14 478 Los Angeles Rock Creek San Gabriel Mountains 1524 Comment
  JEPS41224  Mentzelia congesta Frank W. Peirson 1919-6-14 472 Los Angeles San Gabriel Mountains, Rock Creek Comment
  JEPS79971  Rosa woodsii var. ultramontana Frank W. Peirson 1919-6-14 470 Los Angeles Big Rock Creek Canyon; San Gabriel Mts. 1676 Comment
  POM86818A  Amelanchier utahensis F. W. Peirson 1919-6-14 471 -A Los Angeles Rock Creek Divide, north side of San Gabriel Mountains. 2012 Comment
  RSA86818A  Amelanchier utahensis F. W. Peirson 1919-6-14 471 -A Los Angeles Rock Creek Divide, north side of San Gabriel Mountains. 2012 Comment
  RSA0030025  Delphinium patens subsp. montanum F. W. Peirson 1919-6-14 50 Los Angeles Rock Creek, San Gabriel Mountians. 1982 Comment
  RSA0104653  Eriastrum densifolium subsp. austromontanum F. W. Peirson 1919-6-14 482 Los Angeles Rock Creek, San Gabriel Mts. 1295 Comment
  JEPS60675  Ranunculus cymbalaria var. saximontanus Frank W. Peirson 1919-6-15 486 Los Angeles Rock Creek San Gabriel Mountains 1295 Comment
  JEPS67078  Juncus xiphioides Frank W. Peirson 1919-6-15 488 Los Angeles Rock Creek San Gabriel Mountains Comment
  RSA66742  Eschscholzia minutiflora F. W. Peirson 1919-6-15 487 Los Angeles Rock Creek, north slope of San Gabriel Mountains. 1296 Comment
  RSA80384  Solanum umbelliferum F. W. Peirson 1919-6-15 1082 Los Angeles Rock Creek, north slope of San Gabriel Mountains. 1296 Comment
  RSA86363  Pinus monophylla F. W. Peirson 1919-6-15 2328 Los Angeles Rock Creek 1250 Comment
  RSA90985  Trifolium wormskioldii F. W. Peirson 1919-6-15 485 Los Angeles Rock Creek. San Gabriel Mtns. 1296 Comment
  JEPS44759  Rubus leucodermis Frank W. Peirson 1919-6-16 494 Los Angeles South Fork Rock Creek San Gabriel Mts., South Fork Rock Creek 1981 Comment
  JEPS43922  Fraxinus dipetala Frank W. Peirson 1919-7-1 383 a Los Angeles Fish Canyon San Gabriel Mountains 609 Comment
  JEPS49876  Dudleya lanceolata Frank W. Peirson 1919-7-1 518 Los Angeles Fish Canyon San Gabriel Mtns 304 Comment
  JEPS49975  Dudleya densiflora Frank W. Peirson 1919-7-1 517 Los Angeles Fish Canyon San Gabriel Mtns 274 Comment
  SD70387  Dudleya densiflora Frank W. Peirson 1919-7-1 517 Los Angeles Fish Canyon 274 Comment
  RSA94159  Hulsea heterochroma F. W. Peirson 1919-7-3 514 Los Angeles San Gabriel Mts: on Lukens Peak trail. 1220 Comment
  RSA93808  Chaenactis artemisiifolia F. W. Peirson 1919-7-3 242 Los Angeles San Gabriel Mountains: Lukens Peak 915 Comment
  RSA86956  Betula occidentalis F. W. Peirson 1919-8-2 2817 Inyo Gray s on Kearsarge Trail, Sierra Nevada 1829 Comment
  PASA1733  Erigeron lonchophyllus Frank W. Peirson 1919-8-3 Inyo Onion Valley on the Kearsarge Trail 2743 Comment
  RSA0020550  Draba lemmonii var. lemmonii F. W. Peirson 1919-8-5 652 Fresno Center Basin. 3415 Comment
  RSA94697  Senecio werneriifolius F. W. Peirson 1919-8-6 1441 Fresno Junction Pass, Sierra Nevada. 3963 Comment
  RSA84265  Ranunculus aquatilis var. capillaceus F. W. Peirson 1919-8-7 1874 Tulare Lake above and E of Tyndall Creek on trail to Mt. Whitney. 3384 Comment
  CAS-BOT-BC327848  Oreostemma peirsonii F. W. Peirson 1919-8-8 1276 Tulare Twin Lake Cirque, Mt. Whitney Region Comment
  RSA72165  Epilobium anagallidifolium F. W. Peirson 1919-8-8 770 Tulare Twin Lake Cirque, Mt. Whitney region, Sierra Nevada 3659 Comment
  RSA93845  Aster peirsonii F. W. Peirson 1919-8-8 1276 Tulare Twin Lake Cirque, Mt. Whitney region, Sierra Nevada. 3506 Comment
  RSA77782  Viola adunca F. W. Peirson 1919-8-10 744 Tulare At Funston Camp, Kern River Canyon, Sierra Nevada 2043 Comment
  RSA94851  Arnica longifolia subsp. myriadenia F. W. Peirson 1919-8-13 1422 Fresno Camp near Mineral King, Sierra Nevada 2409 Comment
  RSA83955  Saxifraga oregana F. W. Peirson 1919-8-16 1939 Tulare in damp swale, Giant Forest, Sierra Nevada. 1982 Comment
  LA38979  Mimulus leptaleus Frank W. Peirson; 1919-8-17 1145 Tulare Patee Meadow 2743 Comment
  RSA72179  Epilobium hornemannii subsp. hornemannii F. W. Peirson 1919-8-18 761 Fresno Summit Meadow. Kings River Region. Sierra Nevada. 2439 Comment
  RSA72163  Epilobium anagallidifolium F. W. Peirson 1919-8-24 763 Fresno Above Rae Lake, Sierra Nevada. 3323 Comment
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Dec 23 2018
  RSA77848  Callitriche verna F. W. Peirson 1919-8-24 2048 Fresno Bench above Rae Lake, Sierra Nevada. 3323 Comment
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Dec 23 2018
  SD87582  Callitriche verna F. W. Peirson 1919-8-24 2048 Unknown Rae Lake, bench above lake. 3275 Comment
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Jan 1 2016
  JEPS19208  Lorandersonia peirsonii F. W. Peirson 1919-8-27 1404 Inyo Sawmill Canyon e. slope Sierra Nevada 2956 Comment
  UC221333  Lorandersonia peirsonii Frank W. Peirson 1919-8-27 1404 Inyo Saw Mill Pass 2956 Comment
  RSA93223  Tonestus peirsonii F. W. Peirson 1919-8-27 1404 Inyo Sawmill Canyon east slope of Sierra Nevada. 2957 Comment
  CAS-BOT-BC5241  Epilobium canum subsp. latifolium Frank Warrington Peirson 1919-8-28 759 Mono Saw Mill Canyon, eastern slope of the Sierra Nevada 2286 Comment
  RSA95219  Stephanomeria pauciflora F. W. Peirson 1919-8-28 1472 Inyo Saw Mill trail, near Independence. 1982 Comment
  RSA69956  Kochia californica F. W. Peirson 1919-8-30 1833 Los Angeles Desert between Mojave and Lancaster. Comment
  RSA95065  Hemizonia pungens F. W. Peirson 1919-8-30 1351 Los Angeles Desert between Mojave and Lancaster. Comment
  RSA80318  Lycium californicum F. W. Peirson 1919-11-8 1085 Orange South of Arch Beach, near Laguna Beach Comment
  RSA85047  Polypodium californicum F. W. Peirson 1919-11-30 2838 Los Angeles South base of San Gabriel Mnts., Middle Eaton Canyon. 610 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
  RSA0011736  Asplenium vespertinum F. W. Peirson 1919-12-28 1520 Los Angeles Middle Eaton Canyon, south face of San Gabriel Mts. 610 Comment
  RSA71807  Gilia stellata F. W. Peirson 1920-2-16 2297 Riverside Foot of Alkali Canyon, southeast of Palm Canyon, east base of San Jacintos Mountains Comment
  RSA72237  Camissonia claviformis subsp. aurantiaca F. W. Peirson 1920-2-16 2707 Riverside Palm Canyon stream below the canyon, Palm Springs. region Comment
  RSA74172  Phacelia ambigua F. W. Peirson 1920-2-16 971 Riverside Palm Canyon Stream, Near foot of Alkali Canyon east of Palm Canyon, Riverside County. Comment
  RSA77816  Pectocarya peninsularis F. W. Peirson 1920-2-16 1013 Riverside Palm Canyon stream below the canyon, Palm Springs. region Comment
  RSA94819  Hypochaeris glabra F. W. Peirson 1920-3-14 1469 Los Angeles Arroyo Seco, Pasadena. 442 Comment
  RSA66765  Meconella denticulata F. W. Peirson 1920-3-28 36 Los Angeles Tujunga Canyon: small side canyon in lower Tujunga. 488 Comment
  RSA85318  Berberis nevinii F. W. Peirson 1920-3-28 646 Los Angeles About halfway between Devil's Gate and the mountains, Arroyo Seco, west of Altadena 335 Comment
  RSA94427  Matricaria matricarioides F. W. Peirson 1920-4-20 2104 Los Angeles 1085 New York Drive, Altadena. Comment
  RSA95304  Rhamnus californica subsp. californica F. W. Peirson 1920-4-22 108 Los Angeles Rubio Canyon, south base of San Gabriel Mts. Comment
  RSA80765  Nicotiana glauca F. W. Peirson 1920-4-25 352 Los Angeles Arroyo Seco Canyon, near Pasadena, Ca. 381 Comment
  RSA84282B  Equisetum hyemale var. affine F. W. Peirson 1920-4-25 8450 B Los Angeles Arroyo Seco, Pasadena 411 Comment
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Jan 4 2014
  JEPS53883  Sisymbrium officinale Frank W. Peirson 1920-4-25 2109 Los Angeles Arroyo Seco; San Gabriel Mountains, Arroyo Seco 411 Comment
  RSA80445  Mimulus guttatus F. W. Peirson 1920-4-25 2116 Los Angeles Verdugo Canyon 274 Comment
  RSA65162  Dodecahema leptoceras F. W. Peirson 1920-4-26 2113 Los Angeles Santa Anita Wash, S base of San Gabriel Mts. 213 Comment
  RSA73329  Clarkia purpurea subsp. quadrivulnera F. W. Peirson 1920-4-26 2114 Los Angeles Santa Anita Wash, S base of San Gabriel Mts. 213 Comment
  RSA73055  Leptosiphon lemmonii F. W. Peirson 1920-4-26 2111 Los Angeles Santa Anita Wash above Foothill Blvd. 213 Comment
  RSA84910  Crassula connata F. W. Peirson 1920-4-26 2112 Los Angeles Santa Anita Wash, S base of San Gabriel Mts. 213 Comment
  RSA85549  Aspidotis californica F. W. Peirson 1920-4-26 4296 Los Angeles Santa Anita Wash, S base of San Gabriel Mts. 213 Comment
  CAS-BOT-BC277527  Chaenactis glabriuscula var. lanosa F. W. Peirson; Alice Ottley 1920-5-3 2121 Los Angeles Little Tujunga Wash at road crossing, San Gabriel Mts. 335 Comment
  RSA65596  Loeflingia squarrosa F. W. Peirson 1920-5-3 2123 Los Angeles Little Tujunga Wash, west end of San Gabriel Mts. 335 Comment
  JEPS11361  Mimulus nasutus Frank W. Peirson 1920-5-6 2125 Los Angeles Fish Canyon San Gabriel Mountains 609 Comment
  RSA70485  Oxalis albicans subsp. californica F. W. Peirson 1920-5-6 2126 Los Angeles Fish Canyon, San Gabriel Mountains. 274 Comment
  RSA80463  Mimulus guttatus F. W. Peirson 1920-5-6 2125 Los Angeles Fish Canyon, San Gabriel Mountains 610 Comment
  RSA75882  Nemophila menziesii var. integrifolia F. W. Peirson 1920-5-8 2739 San Bernardino San Antonio Canyon. 1341 Comment
  RSA90391  Lotus strigosus F. W. Peirson 1920-5-9 4693 Los Angeles east trail to Mt. Lowe 1341 Comment
  CAS-BOT-BC296180  Erigeron foliosus var. foliosus F. W. Peirson 1920-5-12 231 Los Angeles San Gabriel Wash near Foothill Boulevard 182 Comment
  RSA65167  Chorizanthe parryi var. parryi F. W. Peirson 1920-5-12 2131 Los Angeles Foothill Blvd. San Gabriel Wash, S base of San Gabriel Mts. 183 Comment
  RSA84288  Equisetum laevigatum F. W. Peirson 1920-5-12 2133 Los Angeles El Monte Comment
  RSA91030  Erigeron foliosus var. stenophyllus F. W. Peirson 1920-5-12 231 Los Angeles Foothill Blvd. San Gabriel Wash, S base of San Gabriel Mts. 182 Comment
  JEPS55285  Lathyrus vestitus var. vestitus Frank W. Peirson 1920-5-16 2137 Los Angeles Tujunga Canyon San Gabriel Mountains 472 Comment
  RSA68671  Calochortus catalinae Frank W. Peirson 1920-5-16 2146 Los Angeles Tujunga Canyon, west end of San Gabriel Mountains. 457 Comment
  RSA65278  Chorizanthe xanti var. leucotheca F. W. Peirson 1920-5-18 1772 San Bernardino Lytle Creek, east end of San Gabriel Mts. 1067 Comment
  RSA88744  Carex hassei F. W. Peirson 1920-5-18 2329 San Bernardino Lytle Creek, east end of San Gabriel Mts. 1067 Comment
  RSA75945  Phacelia austromontana F. W. Peirson 1920-5-19 4717 San Bernardino northward extension of Devil s Backbone 1982 Comment
  JEPS66921  Juncus bufonius Frank W. Peirson 1920-5-20 1643 San Bernardino Lytle Creek San Gabriel Mountains Comment
  SD87726  Collinsia parryi Frank W. Peirson 1920-5-28 San Bernardino San Antonio Canyon 1524 Comment
  POM9778  Collinsia parryi F. W. Peirson 1920-5-28 2156 Los Angeles San Antonio Mountains: Bear Canyon 1372 Comment
  RSA91408  Trifolium albopurpureum F. W. Peirson 1920-5-28 2154 San Bernardino 0.5 miles above Camp Baldy in San Antonio Canyon, San Gabriel Mts 1341 Comment
  RSA86820  Amelanchier utahensis F. W. Peirson 1920-5-29 2155 San Bernardino Icehouse Canyon, E San Gabriel Mts. 1982 Comment
  RSA79962  Cryptantha micrantha F. W. Peirson 1920-6-10 4482 Los Angeles San Gabriel Mts., summit of Mt. Wilson 1738 Comment
  RSA80120  Mimulus johnstonii F. W. Peirson 1920-6-10 196 Los Angeles Divide between Mt. Lowe and Mt. Markham 1646 Comment
  CAS-BOT-BC343065  Madia gracilis F. W. Peirson 1920-6-10 2777 Los Angeles Maple Spring, trail to Mt. Lowe, San Gabriel Mts. 1066 Comment
  RSA97227  Garrya flavescens var. pallida F. W. Peirson 1920-6-10 822 Los Angeles Trail from San Gabriel Peak to Mt. Wilson, San Gabriel Mts. 1677 Comment
  UC39369  Oenothera sinuosa F. W. Peirson 1920-6-13 2160 Los Angeles Pasadena Comment
  RSA100199  Lonicera subspicata var. denudata F. W. Peirson 1920-6-22 217 Riverside Dripping Springs, Temecula River 457 Comment
  RSA100337  Heterocodon rariflorum F. W. Peirson 1920-6-22 4065 San Diego East foot of Morgan Hill, Palomar Mountains 1433 Comment
  RSA66320  Polygonum lapathifolium F. W. Peirson 1920-6-22 1791 San Bernardino 2 miles south of Chino Comment
  RSA80320  Hydrocotyle ranunculoides F. W. Peirson 1920-6-22 2168 San Bernardino Chino Creek 152 Comment
  CAS-BOT-BC514969  Eriastrum sapphirinum subsp. dasyanthum Frank W. Peirson 1920-6-22 4708 Los Angeles Temescal Canyon 304 Comment
  RSA0121585  Eriastrum sapphirinum subsp. dasyanthum F. W. Peirson 1920-6-22 4474 Riverside Dripping Spring southeast of Temecula 457 Comment
  RSA90445  Glycyrrhiza lepidota F. W. Peirson 1920-6-22 588 Riverside Santa Ana River. 152 Comment
  RSA95047  Hemizonia parryi subsp. australis F. W. Peirson 1920-6-22 1352 Los Angeles Along Valley Boulevard at Bassett Comment
  RSA0124136  Eriastrum sapphirinum subsp. sapphirinum F. W. Peirson 1920-6-23 2299 San Diego Oak Grove. 854 Comment
  RSA70048  Corallorhiza maculata Frank W. Peirson 1920-6-24 1697 San Diego West of summit of Mt. Palomar, [Palomar Mountains]. 1677 Comment
  RSA71882  Gilia diegensis F. W. Peirson 1920-6-24 2294 San Diego On east trail to Palomar Mtn. 1677 Comment
  RSA77702  Ceanothus palmeri F. W. Peirson 1920-6-24 4193 San Diego West of summit of Mt. Palomar, [Palomar Mountains]. 1677 Comment
  RSA77716  Ceanothus greggii var. perplexans F. W. Peirson 1920-6-24 2722 San Diego Oak Grove, east base of Palomar Mountains Comment
  RSA80062  Mimulus diffusus F. W. Peirson 1920-6-24 2183 San Diego Meadow east of Morgan Hill; Palomar Mts. 1433 Comment
  UCR136641  Castilleja applegatei F. W. Peirson 1920-6-24 2174 San Diego Palomar Mountains, east foot of Morgan Hill 1585 Comment
  RSA65165  Loeflingia squarrosa F. W. Peirson 1920-6-25 4214 San Diego San Luis Rey River. 915 Comment
  RSA80767  Petunia parviflora F. W. Peirson 1920-6-25 2207 San Diego Road from Warners Hot Springs to Oak Grove, on San Luis Rey River. 915 Comment
  RSA451826  Petrophytum caespitosum F. W. Peirson 1920-7-1 3399 Tulare Big Arroyo. Comment
  RSA90318  Lotus scoparius F. W. Peirson 1920-7-29 4087 San Luis Obispo 1 mile south of Pismo Beach. Comment
  RSA90743  Astragalus pomonensis F. W. Peirson 1920-7-29 2229 San Luis Obispo 1 mile south of Pismo Beach. Comment
  CAS-BOT-BC166414  Epilobium canum subsp. canum Peirson 1920-7-30 2234 San Luis Obispo Willow Creek, Morro region, sea level Comment
  RSA90879  Carex spissa F. W. Peirson 1920-7-30 2218 San Luis Obispo Willow Creek, near Morro. Comment
  RSA65399  Atriplex californica F. W. Peirson 1920-8-1 1822 San Luis Obispo Morro Inlet. Comment
  SD87603  Extriplex californica Frank W. Peirson 1920-8-1 1822 San Luis Obispo Morrow Inlet. Comment
  RSA92712  Salix lemmonii F. W. Peirson 1920-8-22 721 San Bernardino Ridge east of Foxesee Creek [Forsee Creek], San Bernardino Mts 2896 Comment
  RSA94126  Hulsea vestita subsp. parryi F. W. Peirson 1920-8-22 1407 San Bernardino Ridge east of Foxesee Creek [Forsee Creek], San Bernardino Mts 2895 Comment
  RSA82056  Cordylanthus nevinii F. W. Peirson 1920-8-22 2680 San Bernardino Ridge east of Foxesee Creek [Forsee Creek], San Bernardino Mountains 2287 Comment
  RSA72091  Epilobium canum subsp. latifolium F. W. Peirson 1920-8-23 3349 San Bernardino Santa Ana River 1905 Comment
  UC672174  Erigeron divergens Frank W. Peirson 1920-8-23 1286 San Bernardino at South Fork Santa Ana River; San Bernardino Mts., Santa Ana River 1920 Comment
  SD87702  Galium parishii F. W. Peirson 1920-8-24 Unknown Big Meadows 2133 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
  RSA86188  Cystopteris fragilis F. W. Peirson 1920-8-25 4299 San Bernardino South Fork of Santa Ana River 2438 Comment
  SBBG54476  Malaxis monophyllos subsp. brachypoda F. W. Peirson 1920-8-25 San Bernardino meadows, S Fork, Santa Ana River 2438 Comment
  RSA71005  Cuscuta ceanothi F. W. Peirson 1920-8-26 2740 San Bernardino Santa Ana River 1372 Comment
  RSA84208  Sedum niveum F. W. Peirson 1920-8-26 2298 San Bernardino Creek east of Foresee Creek, north base of Mount San Bernardino. 1677 Comment
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Jan 2 2012
  RSA77785  Lythrum californicum F. W. Peirson 1920-9-5 291 Los Angeles Eaton Canyon, south base of San Gabriel Mountains. 457 Comment
  RSA65986  Eriogonum umbellatum var. minus F. W. Peirson 1920-9-12 21 Los Angeles Summit of 'Baldy' (Mt. San Antonio) 3049 Comment
  PASA1809  Corethrogyne filaginifolia Frank W. Peirson 1920-9-13 San Bernardino San Antonio Canyon, San Gabriel Mts. 1523 Comment
  RSA70068  Platanthera sparsiflora Frank W. Peirson 1920-9-14 4284 San Bernardino Coldwater cienega, tributary of Lytle Creek, San Gabriel Mountains. 2134 Comment
  RSA77164  Ceanothus leucodermis F. W. Peirson 1920-9-14 2281 San Bernardino Coldwater Canyon, San Gabriel Mts. 2134 Comment
  CAS-BOT-BC514241  Maianthemum stellatum Frank W. Peirson 1920-9-14 1682 San Bernardino Coldwater Cienega, Lytle Creek, San Gabriel Mts. 2133 Comment
  RSA0080573  Pyrola dentata F. W. Peirson 1920-9-14 4727 San Bernardino Slope above Coldwater Cienega: fork of Lytle Creek 2134 Comment
  CAS-BOT-BC310860  Heterotheca sessiliflora subsp. fastigiata Frank W. Peirson 1920-9-15 4734 San Bernardino San Gabriel Mts. Lytle Cr. Comment
  JEPS36842  Stephanomeria pauciflora F. W. Peirson 1920-9-15 250 a San Bernardino Lytle Creek San Gabriel Mts., Lytle Creek 1828 Comment
  RSA90366  Lotus heermannii var. heermannii F. W. Peirson 1920-9-15 2283 San Bernardino Lytle Creek. San Gabriel Mts. 1982 Comment
  RSA91968  Elymus elymoides subsp. elymoides F. W. Peirson 1920-9-15 5370 Los Angeles Along ridge west of summit of Mt. San Antonio, San Gabriel Mountains. 2896 Comment
  CAS-BOT-BC269800  Eriogonum nudum var. pauciflorum Frank W. Peirson 1920-9-16 20 San Bernardino North Fork San Antonio, San Gabriel Mts. Comment
  RSA70386  Euphorbia polycarpa var. hirtella F. W. Peirson 1920-12-28 2040 Riverside Wash coming down from the east; lower part of Palm Canyon. Comment
  PASA833  Dicoria canescens Frank W. Peirson 1920-12-29 Riverside One and one-half miles east of Thite-water 304 Comment
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Nov 12 2014
  RSA93686  Ambrosia psilostachya F. W. Peirson 1920-12-29 5276 Riverside Murray Canyon near Palm Springs. Comment
  RSA90708  Astragalus trichopodus var. lonchus F. W. Peirson 1921-2-26 586 Los Angeles Foot of Topanga Canyon, Santa Monica Mtns. Comment
  RSA97281  Lomatium vaginatum F. W. Peirson 1921-2-26 2358 Los Angeles Topanga Canyon, west end of San Gabriel Mountains 304 Comment
  RSA435910  Berberis nevinii F. W. Peirson 1921-3-3 s.n. Los Angeles Near stream, Arroyo Seco 335 Comment
  RSA86771  Vulpia myuros F. W. Peirson 1921-3-6 2360 Los Angeles San Gabriel Wash. 213 Comment
  RSA80830  Pedicularis densiflora F. W. Peirson 1921-3-19 2741 Riverside 4 miles west of Beaumont, on road to Redlands. Comment
  RSA69621  Juncus acutus subsp. leopoldii F. W. Peirson 1921-3-20 2366 Riverside Palm Canyon, east base of San Jacinto Mountains 305 Comment
  JEPS67559  Cryptantha decipiens F. W. Peirson 1921-3-21 2368 a Riverside above Andreas Canyon (Gordon trail) 1066 Comment
  CAS-BOT-BC342257  Logfia filaginoides F. W. Peirson 1921-3-22 5277 Riverside Murray Canyon near Palm Springs 487 Comment
  PASA1246  Poa bigelovii Frank W. Peirson 1921-3-22 Riverside Murray Canyon 457 Comment
  RSA65720  Claytonia parviflora subsp. utahensis F. W. Peirson 1921-3-22 2389 Riverside Murray Canyon near Palm Springs. 457 Comment
  RSA90953  Erigeron divergens F. W. Peirson 1921-3-22 2365 Riverside Andreas Canyon, Palm Springs region Comment
  RSA80747  Cryptantha racemosa F. W. Peirson 1921-3-23 2377 Riverside Deep Canyon south of Coachella Valley 335 Comment
  RSA93767  Geraea canescens F. W. Peirson 1921-3-23 2782 Riverside 10 miles SE of Palm Spring Comment
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Apr 21 2011
  RSA92413  Coreopsis bigelovii F. W. Peirson 1921-3-29 4238 San Bernardino Hill slopes above road at Cajon Pass. 1220 Comment
  RSA92642  Salix lasiolepis F. W. Peirson 1921-4-3 9608 Los Angeles Pacoima Canyon, west end of San Gabriel Mountains 518 Comment
  RSA92699  Salix laevigata F. W. Peirson 1921-4-3 2668 Los Angeles Pacoima Canyon, west end of San Gabriel Mountains 518 Comment
  JEPS66150  Vicia americana var. americana Frank W. Peirson 1921-4-10 2396 Los Angeles San Dimas Canyon; San Gabriel Mountains 426 Comment
  RSA66304  Papaver californicum F. W. Peirson 1921-4-10 2397 Los Angeles Trail from San Dimas to Sycamore Flat, San Gabriel Mountains. 534 Comment
  CAS-BOT-BC432201  Lithophragma bolanderi Frank W. Peirson 1921-4-13 2395 Los Angeles Pacoima Canyon, San Gabriel Mts. 548 Comment
  JEPS62247  Zigadenus fremontii Frank W. Peirson 1921-4-21 2402 Los Angeles Sycamore Flat to San Dimas Creek; San Gabriel Mountains 792 Comment
  RSA73331  Clarkia epilobioides F. W. Peirson 1921-4-21 47025 Los Angeles Trail to Sycamore Flat, San Gabriel Mountains. 530 Comment
  RSA91318  Lupinus excubitus var. hallii F. W. Peirson 1921-5-3 7722 Los Angeles ridge between Bear Canyon and Millard Canyon, San Gabriel Mts 1067 Comment
  RSA92321  Poa secunda var. secunda F. W. Peirson 1921-5-3 1549 Los Angeles Bear Canyon Ridge west of Mt. Lowe 1219 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
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Sep 30 2014
  RSA90067  Lotus argophyllus var. argophyllus F. W. Peirson 1921-5-12 4091 Los Angeles Big Santa Anita Canyon, S base of San Gabriel Mts 762 Comment
  JEPS39440  Ambrosia salsola var. salsola F. W. Peirson 1921-5-19 1316 Los Angeles Little Rock Cr. San Gabriel Mts., Little Rock Cr. 944 Comment
  JEPS56459  Eriogonum pusillum Frank W. Peirson 1921-5-19 2406 Los Angeles Little Rock Creek San Gabriel Mountains, Little Rock Creek Comment
  RSA66294  Canbya candida F. W. Peirson 1921-5-19 2412 Los Angeles Little Rock Creek: north base of San Gabriel Mountains. 1037 Comment
  RSA82185  Salazaria mexicana F. W. Peirson 1921-5-19 2730 Los Angeles Little Rock Creek 945 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
  RSA71839  Gilia leptantha subsp. transversa F. W. Peirson 1921-5-20 4132 Los Angeles Little Rock Creek: north base of San Gabriel Mountains. 1006 Comment
  RSA88717  Carex alma F. W. Peirson 1921-5-20 5371 Los Angeles Mojave Desert, Little Rock Creek, San Gabriel Mountains 1067 Comment
  RSA0017216  Gilia ochroleuca subsp. bizonata F. W. Peirson 1921-5-20 4135 Los Angeles Little Rock Creek: north base of San Gabriel Mountains. 1006 Comment
  RSA70313  Juncus xiphioides F. W. Peirson 1921-5-20 2418 Los Angeles Little Rock Creek 1204 Comment
  CAS-BOT-BC349883  Nicolletia occidentalis Frank W. Peirson 1921-5-29 2423 San Bernardino Mojave Desert. Mohave Riv. Comment
  RSA72199  Oenothera californica subsp. californica F. W. Peirson 1921-5-29 2708 San Bernardino Almost due east of Hesperia and on Mojave River. 884 Comment
  RSA74728  Phacelia curvipes F. W. Peirson 1921-5-29 2431 San Bernardino north slope of Cajon Pass 1098 Comment
  SBBG28963  Lupinus concinnus F. W. Peirson 1921-5-29 San Bernardino summit of Cajon Pass 1219 Comment
  UC501631  Lessingia glandulifera var. glandulifera Frank W. Peirson 1921-5-29 1262 San Bernardino opposite Hesperia; Mohave River 868 Comment
  UC573115  Cryptantha pterocarya Frank W. Peirson 1921-5-29 5812 San Bernardino Mohave River 883 Comment
  RSA498764  Lotus procumbens var. procumbens F. W. Peirson 1921-5-29 s.n. San Bernardino Summit of Cajon Pass. 1220 Comment
  RSA92501  Stylocline gnaphaloides F. W. Peirson 1921-5-29 5280 San Bernardino Cajon Pass 1098 Comment
  RSA97320  Lomatium lucidum F. W. Peirson 1921-5-29 4462 San Bernardino Summit of Cajon Pass. 1220 Comment
  RSA93219  Ericameria cooperi F. W. Peirson 1921-5-30 5427 San Bernardino Mojave River, Victorville. 884 Comment
  RSA94160  Hulsea heterochroma F. W. Peirson 1921-5-30 2490 San Bernardino Going up to Lone Pine Canyon from Cajon Canyon, San Gabriel Mountains. 991 Comment
  RSA100228  Githopsis diffusa subsp. diffusa F. W. Peirson 1921-6-13 1208 Los Angeles Big Santa Anita Canyon Trail, about 1.5 miles below Sturdevants. 1067 Comment
  RSA75883  Nemophila menziesii var. integrifolia F. W. Peirson 1921-6-13 2738 Los Angeles Ranger s cabin, west fork of San Gabriel River. 960 Comment
  SD87809  Githopsis diffusa subsp. diffusa F. W. Peirson 1921-6-13 1208 Los Angeles Big Santa Anita Trail, 1.5 miles below Sturdevant's Camp. 1064 Comment
  CAS-BOT-BC434370  Sidotheca trilobata Frank W. Peirson 1921-6-14 1783 Los Angeles Tujunga Canyon, San Gabriel Mts. 1280 Comment
  JEPS50261  Viola purpurea subsp. venosa Frank W. Peirson 1921-6-15 2491 Los Angeles Trail Pine Flats to Chilao (San Gabriel Mountains); San Gabriel Mountains 1676 Comment
  JEPS68011  Plagiobothrys collinus Frank W. Peirson 1921-6-15 997 Los Angeles Pine Flats to Chilao; San Gabriel Mountains 1676 Comment
  RSA80745  Cryptantha oxygona F. W. Peirson 1921-6-15 2463 Los Angeles Trail from Pine Flats to Chilao 1677 Comment
  PASA2282  Antennaria dimorpha Frank W. Peirson 1921-6-15 Los Angeles Pine Flats, San Gabriel Mts. 1676 Comment
  RSA97430  Arceuthobium occidentale F. W. Peirson 1921-6-15 2322 Los Angeles Chilao, San Gabriel Mountains. 1646 Comment
  CAS-BOT-BC205151  Lupinus elatus F. W. Peirson; Bulletin Torrey Club 1921-6-16 2438 Los Angeles Waterman Ridge Comment
  JEPS1976  Phacelia imbricata subsp. patula Frank W. Peirson 1921-6-16 2451 Los Angeles Mt. Waterman Ridge San Gabriel Mountains 2286 Comment
  JEPS65121  Lupinus elatus Frank W. Peirson 1921-6-16 2438 Los Angeles Waterman Ridge; San Gabriel Mts., Waterman Ridge 2286 Comment
  POM47663  Lithophragma tenellum F. W. Peirson 1921-6-16 4690 Los Angeles Summit of Mt. Waterman, San Gabriel Mountains 2317 Comment
  RSA70144  Triteleia dudleyi F. W. Peirson 1921-6-16 2458 Los Angeles along stream north of Mt. Waterman, San Gabriel Mountains 1860 Comment
  RSA70453  Allium burlewii F. W. Peirson 1921-6-16 2842 Los Angeles north slope of Mt. Waterman 2133 Comment
  RSA74923  Phacelia imbricata subsp. patula F. W. Peirson 1921-6-16 2451 Los Angeles Summit of Mt. Waterman Ridge 2287 Comment
  RSA97346  Lomatium nevadense var. parishii F. W. Peirson 1921-6-16 4460 Los Angeles North slope of Mt. Waterman, San Gabriel Mts. 1981 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
  PASA2285  Gnaphalium chilense Frank W. Peirson 1921-6-19 Los Angeles Crystal Lake, North Fork San Gabriel River 1676 Comment
  RSA84474  Ceratophyllum demersum F. W. Peirson 1921-6-19 2614 Los Angeles Crystal Lake, North Fork San Gabriel River 1676 Comment
  RSA87443  Galium aparine F. W. Peirson 1921-6-19 1184 Los Angeles North Fork of San Gabriel River. 1006 Comment
  RSA0004846  Navarretia atractyloides var. flavida F. W. Peirson 1921-6-20 2444 Los Angeles North Fork of San Gabriel River 457 Comment
  RSA70403  Chamaesyce serpillifolia subsp. serpillifolia F. W. Peirson 1921-6-20 2445 Los Angeles North Fork of San Gabriel River 457 Comment
  RSA65163  Dodecahema leptoceras F. W. Peirson 1921-6-21 2455 Los Angeles West Fork of San Gabriel River, San Gabriel Mts. 640 Comment
  PASA2761  Stellaria longipes F. W. Peirson 1921-6-27 Y 16 Mariposa Yosemite Valley, below Sentinal Rock Comment
  PASA2834  Draperia systyla F. W. Peirson 1921-6-28 Y 32 Mariposa Tenaya Canyon Comment
  PASA2841  Fragaria californica F. W. Peirson 1921-7-1 Y 39 Mariposa above Lake Merced Comment
  RSA0079395  Cryptantha muricata var. jonesii F. W. Peirson 1921-7-1 2476 Los Angeles Arraster Creek, north slope of San Gabriel Mountains. 945 Comment
  POM9681  Centaurium exaltatum F. W. Peirson 1921-7-2 2482 Los Angeles Pallett Creek, San Gabriel Mountains. 1098 Comment
  RSA90414  Lotus oblongifolius var. oblongifolius F. W. Peirson 1921-7-2 4080 Los Angeles Pallett Creek, San Gabriel Mountains 1098 Comment
  JEPS27573  Gayophytum oligospermum Frank W. Peirson 1921-7-3 2483 Los Angeles Vincent Gulch San Gabriel Mountains 1981 Comment
  JEPS69712  Gilia splendens subsp. splendens Frank W. Peirson 1921-7-3 2485 Los Angeles trail ne Rock Creek divide; San Gabriel Mountains, ne of Rock Creek divide 2133 Comment
  PASA2776  Lupinus stiversii F. W. Peirson 1921-7-3 Y 70 Mariposa above Little Yosemite Comment
  RSA92277  Layia glandulosa F. W. Peirson 1921-7-3 2778 Los Angeles 2 miles NE of Rock Creek Divide, N slope of San Gabriel Mts. 2287 Comment
  RSA86944  Lupinus sparsiflorus subsp. sparsiflorus F. W. Peirson 1921-7-4 2496 San Bernardino 2 miles north of the summit of Canyon Pass on road to Phelan Comment
  PASA2876  Polemonium pulcherrimum F. W. Peirson 1921-7-7 Y 82 Mariposa Ten Lakes Comment
  PASA2810  Lappula velutina F. W. Peirson 1921-7-9 Y 110 Mariposa Ten Lakes trail Comment
  JEPS44249  Drymocallis lactea var. lactea Frank W. Peirson 1921-7-17 2678 Los Angeles Prairie Fork San Gabriel Mts., Prairie Fork 2057 Comment
  RSA69308  Pyrola picta F. W. Peirson 1921-7-17 2512 Los Angeles Prairie Fork of San Gabriel River, San Gabriel Mountains. 2134 Comment
  JEPS43881  Epilobium glaberrimum subsp. glaberrimum Frank W. Peirson 1921-7-17 2499 Los Angeles Prairie Fork <of> San Gabriel Riv. San Gabriel Mountains 2011 Comment
  PASA987  Castilleja montana Frank W. Peirson 1921-7-17 Los Angeles Praire Fork of the San Gabriel River 2133 Comment
  RSA95281  Rhamnus tomentella subsp. cuspidata F. W. Peirson 1921-7-17 4308 Los Angeles Prairie Fork of San Gabriel River, San Gabriel Mountains. 2012 Comment
  PASA2796  Fritillaria pinetorum F. W. Peirson 1921-7-18 Los Angeles San Gabriel Mtns., Mt. Williamson 2316 Comment
  RSA77156  Ceanothus leucodermis F. W. Peirson 1921-7-18 4446 San Bernardino Lytle Creek, San Gabriel Mts. 1677 Comment
  RSA80763  Mimulus pilosus F. W. Peirson 1921-7-19 2514 Los Angeles San Gabriel Mts: junction of Coldwater Canyon and Cattle Canyon 793 Comment
  JEPS36685  Lactuca serriola F. W. Peirson 1921-7-20 1488 Los Angeles San Gabriel River San Gabriel Mts., San Gabriel River 457 Comment
  CAS-BOT-BC267841  Eriogonum umbellatum var. chlorothamnus Frank W. Peirson 1921-8-5 2618 Inyo Big Pine Creek 2590 Comment
  CAS-BOT-BC339814  Solidago multiradiata Frank W. Peirson 1921-8-5 2637 Inyo Big Pine Creek 2286 Comment
  RSA68703  Lilium kelleyanum Frank W. Peirson 1921-8-5 1678 Inyo Big Pine Creek, Sierra Nevada. 2896 Comment
  PASA1319  Arenaria capillaris Frank W. Peirson 1921-8-5 Inyo Big Pine Creek 2590 Comment
  PASA1498  Eriogonum spergulinum Frank W. Peirson 1921-8-6 Inyo Near Coyote Pass 3200 Comment
  RSA64726  Eriogonum spergulinum var. reddingianum F. W. Peirson 1921-8-6 1728 Inyo Camp near Coyote Pass 3201 Comment
  RSA65668  Montia chamissoi F. W. Peirson 1921-8-6 2622 Inyo Camp near Coyote Pass 3201 Comment
  RSA93184  Machaeranthera canescens F. W. Peirson 1921-8-6 2526 Inyo Trail out of Big Pine to Baker Creek, Sierra Nevada 3125 Comment
  RSA90613  Pyrrocoma apargioides F. W. Peirson 1921-8-7 1237 Inyo East slope of Piute Pass, Sierra Nevada. 3354 Comment
  RSA93656  Antennaria rosea F. W. Peirson 1921-8-7 2636 Inyo North fork of Bishop Creek. 3049 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
  RSA80845  Pedicularis attollens F. W. Peirson 1921-8-10 1170 Fresno Evolution Creek, Sierra Nevada 2957 Comment
  RSA85758  Potentilla glandulosa var. nevadensis F. W. Peirson 1921-8-10 1973 Fresno Evolution Creek, Sierra Nevada Creek. 2957 Comment
  RSA87222  Lupinus pratensis F. W. Peirson 1921-8-10 2554 Fresno Evolution Creek, Sierra Nevada 2957 Comment
  RSA94996  Agoseris aurantiaca var. aurantiaca F. W. Peirson 1921-8-11 s.n. Fresno SW slope of Mt. Darwin, near Evolution Lake, Sierra Nevada 3506 Comment
  RSA85808  Ivesia muirii F. W. Peirson 1921-8-12 5256 Fresno N slope of Muir Pass, Sierra Nevada. 3582 Comment
  RSA94722  Senecio fremontii F. W. Peirson 1921-8-12 1438 Fresno Le Conte Canyon, middle fork of Kings River, Sierra Nevada. 3049 Comment
  RSA68684  Zigadenus venenosus var. venenosus Frank W. Peirson 1921-8-13 2821 Fresno Grouse Meadows, Middle Fork of Kings River, Sierra Nevada. 2515 Comment
  RSA69235  Gaultheria humifusa F. W. Peirson 1921-8-13 2530 Fresno Grouse Meadows. 2515 Comment
  UCD86683  Muhlenbergia filiformis F. W. Peirson 1921-8-16 2565 Fresno Sierra Nevada. South fork of Kings River. 2895 Comment
  CAS-BOT-BC77771  Woodsia scopulina Frank W. Peirson 1921-8-18 2837 Tulare Taboose Pass, Sierra Nevada 3200 Comment
  PASA1351  Raillardella argentea Frank W. Peirson 1921-8-18 2632 Fresno Taboose Pass, west slope 3505 Comment
  RSA0129587  Arabis lemmonii var. depauperata F. W. Peirson 1921-8-19 2536 Inyo Taboose Pass, Sierra Nevada. 1982 Comment
  CAS-BOT-BC106135  Brickellia nevinii Frank W. Peirson 1921-10-22 2599 Los Angeles Head of Eaton Canyon [Canon] - San Gabriel Mts. 1645 Comment
  RSA85550  Cheilanthes covillei F. W. Peirson 1921-10-22 4297 Los Angeles San Gabriel Mountains, trail from San Gabriel Peak to Mt. Wilson. 1524 Comment
  JEPS19123  Isocoma menziesii var. vernonioides Frank W. Peirson 1921-11-11 2596 Los Angeles Saugus Comment
  JEPS56524  Eriogonum roseum Frank W. Peirson 1921-11-11 2719 Los Angeles Elizabeth Lake Comment
  PASA1740  Haplopappus palmeri var. pachylepis Frank W. Peirson 1921-11-11 Los Angeles Lower part of Bouquet Canyon 426 Comment
  RSA66842  Caulanthus heterophyllus F. W. Peirson 1922-4-4 2911 San Diego Torrey Pines. Comment
  RSA67365  Guillenia lasiophylla F. W. Peirson 1922-4-9 2918 Riverside Andreas Canyon near Palm Springs, Coachella Valley. 671 Comment
  RSA74175  Phacelia ambigua F. W. Peirson 1922-4-9 4126 Riverside Palm Canyon Region, near Palm Springs. Comment
  UC555405  Lotus rigidus Frank W. Peirson 1922-4-9 Riverside Andreas Canyon Comment
  RSA92525  Bahiopsis parishii F. W. Peirson 1922-4-9 4148 Riverside Murray Canyon, near Palm Springs Comment
  PASA2659  Arabis holboellii var. fendleri Frank W. Peirson 1922-4-10 2869 Riverside Murray Canyon, Palm Springs Region 609 Comment
  RSA95371  Sphaeralcea ambigua subsp. ambigua F. W. Peirson 1922-4-11 4106 Riverside Deep Canyon Wash, southwest of Indio 244 Comment
  RSA399168  Oligomeris linifolia F. W. Peirson 1922-4-12 s.n. Imperial 28 miles south of Coachella. Comment
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Jul 27 2007
  RSA65199  Chorizanthe brevicornu var. brevicornu F. W. Peirson 1922-4-12 4213 Imperial 28 miles south of Coachella. Comment
  RSA69690  Mentzelia desertorum F. W. Peirson 1922-4-12 751 Riverside along boulevard, 18 mi. southeast of Coachella. Comment
  RSA80686  Oligomeris linifolia F. W. Peirson 1922-4-12 1925 Imperial 15 miles south of Coachella. Comment
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Apr 1 2013
  RSA90765  Astragalus crotalariae F. W. Peirson 1922-4-12 2904 Imperial 30 miles south of Coachella. Comment
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Oct 8 2011
  JEPS54840  Astragalus palmeri Frank W. Peirson 1922-4-13 2899 San Diego Mountain Springs grade 1066 Comment
  PASA954  Senecio mohavensis Frank W. Peirson 1922-4-13 Imperial Moutain Springs Grade 365 Comment
  RSA71805  Gilia stellata F. W. Peirson 1922-4-13 2861 San Diego Mountain Springs, eastern San Diego County. Comment
  RSA79885  Datura discolor F. W. Peirson 1922-4-13 2897 Imperial Foot of Mountain Springs Grade, w. Imperial County. Comment
  RSA79958  Cryptantha micrantha var. lepida F. W. Peirson 1922-4-13 2885 San Diego Mountain Springs grade east of Jacumba; eastern San Diego 1067 Comment
  RSA92224  Porophyllum gracile F. W. Peirson 1922-4-13 2882 Imperial Foot of Mountain Springs Grade, w. Imperial County. Comment
  RSA95058  Rafinesquia neomexicana F. W. Peirson 1922-4-13 2910 Imperial Mountain Springs, western Imperial County on El Centro to San Diego highway. 793 Comment
  RSA70857  Xylococcus bicolor F. W. Peirson 1922-4-14 830 San Diego Torrey Pines Park near San Diego Comment
  RSA77082  Cneoridium dumosum F. W. Peirson 1922-4-14 2030 San Diego Torrey Pines, Comment
  PASA2175  Baeria chrysostoma var. gracilis Frank W. Peirson 1922-4-29 Riverside Lake Elsinore 374 Comment
  PASA628  Juncus bufonius Frank W. Peirson 1922-4-29 Riverside South side Lake Elsinore Comment
  POM317055  Lupinus bicolor subsp. microphyllus F. W. Peirson 1922-4-29 5224 Riverside South of Lake Elsinore. 381 Comment
  RSA428780  Solanum umbelliferum F. W. Peirson 1922-4-29 4487 Riverside Leach Canyon. (base of Santa Ana Mts., near Elsinore) 534 Comment
  UCR208881  Astragalus didymocarpus var. dispermus F. W. Peirson 1922-4-29 2939 Riverside Peninsular Range, Dripping Spring, near Temecula River 457 Comment
  RSA90742  Astragalus pomonensis F. W. Peirson 1922-4-29 2957 Riverside Roadside W of Lake Elsinore. 381 Comment
  RSA91079  Trifolium depauperatum var. truncatum F. W. Peirson 1922-4-29 2938 Riverside Mud flat south of Elsinore Comment
  RSA92387  Eriophyllum multicaule F. W. Peirson 1922-4-29 2927 Riverside Road to Leach Canyon 1 mile N of Lake Elsinore. Comment
  RSA91236  Vicia sativa subsp. nigra F. W. Peirson 1922-5-7 2018 Los Angeles New York Drive at Fair Oaks Reservoir, Altadena. Comment
  JEPS44626  Prunus fasciculata Frank W. Peirson 1922-5-12 1987 San Bernardino Cajon Pass; San Gabriel Range, Cajon Pass 1981 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
  RSA70164  Dichelostemma capitatum subsp. pauciflorum F. W. Peirson 1922-5-12 2993 San Bernardino 22 miles north of Barstow, Comment
  RSA766476  Eriogonum trichopes F. W. Peirson 1922-5-12 2975 San Bernardino 10 miles north of Barstow. Comment
  CAS-BOT-BC376677  Syntrichopappus fremontii F. W. Peirson 1922-5-12 4243 San Bernardino Desert 22 miles north of Barstow Comment
  RSA94638  Syntrichopappus fremontii F. W. Peirson 1922-5-12 4243 San Bernardino 22 miles north of Barstow, Comment
  JEPS56873  Eriogonum heermannii var. argense F. W. Peirson 1922-5-13 2963 San Bernardino Pilot Knob Mohave Desert 1524 Comment
  RSA85184  Ephedra viridis F. W. Peirson 1922-5-13 1526 San Bernardino Summit of Pilot Knob, northwestern San Bernardino County 1677 Comment
  RSA0091579  Amsinckia vernicosa F. W. Peirson 1922-5-13 2978 San Bernardino North slope of Pilot Knob, northwestern Mojave Desert. 1296 Comment
  RSA91569  Trifolium gracilentum F. W. Peirson 1922-5-13 2969 San Bernardino Granite Wells, Mojave Desert. Comment
  RSA93899  Encelia actoni F. W. Peirson 1922-5-13 4145 San Bernardino 2 miles north of Granite Wells, Mojave Desert. Comment
  RSA94419  Eriophyllum ambiguum var. paleaceum F. W. Peirson 1922-5-13 2971 San Bernardino Copper City, Mojave Desert. 1220 Comment
  CAS-BOT-BC211034  Fraxinus velutina Frank W. Peirson 1922-5-14 2994 San Bernardino Mojave Desert. Between Oro Grande & Bridge. Along Mojave Riv. Comment
  POM14072  Cymopterus aboriginum F. W. Peirson, I. M. Johnston 1922-5-14 6540 San Bernardino Northeast slope of Pilot Knob Comment
  RSA73070  Linanthus demissus F. W. Peirson 1922-5-14 2967 San Bernardino In so-called Devil's Kitchen; half way between Barstow and Victorville. Comment
  RSA77070  Langloisia setosissima subsp. punctata F. W. Peirson 1922-5-14 3009 San Bernardino Half between Barstow and Victorville. Comment
  RSA91371  Psorothamnus arborescens F. W. Peirson 1922-5-14 2991 San Bernardino 17 miles south of Barstow Comment
  CAS-BOT-BC330345  Pentachaeta aurea F. W. Peirson 1922-5-19 3037 Riverside Road along San Jacinto River, San Jacinto Mts. 1143 Comment
  PASA2173  Baeria aristata Frank W. Peirson 1922-5-19 Riverside 5 miles northeast of Murietta 457 Comment
  PASA2518  Ceanothus tomentosus Frank W. Peirson 1922-5-19 Orange Small canyon heading eastward from the Santa Ana Canyon at 400 ft. Comment
  RSA65259  Chorizanthe polygonoides var. longispina F. W. Peirson 1922-5-19 3025 Riverside 3 miles northeast of Murrieta. Comment
  RSA70039  Arthrocnemum subterminale F. W. Peirson 1922-5-19 3068 Riverside 2 miles southeast of Perris Comment
  RSA92370  Orcuttia californica F. W. Peirson 1922-5-19 3020 Riverside In Menifee Valley, 10 miles northeast of Murrieta 427 Comment
Read comments
Apr 3 2011
  RSA92991  Lasthenia coronaria F. W. Peirson 1922-5-19 4519 Riverside 5 miles NE of Murrieta 457 Comment
  RSA93281  Pentachaeta aurea F. W. Peirson 1922-5-19 3037 Riverside San Jacinto River 1143 Comment
  RSA67108  Myosurus minimus var. filiformis F. W. Peirson 1922-5-20 3035 Riverside Hemet Valley, San Jacinto Mts. 1387 Comment
  RSA73087  Linanthus dianthiflorus subsp. dianthiflorus F. W. Peirson 1922-5-20 4471 Riverside Hemet Valley, San Jacinto Mountains. 1371 Comment
  RSA86362  Pinus quadrifolia F. W. Peirson 1922-5-20 3059 Riverside Hemet Valley, San Jacinto Mts. 1494 Comment
  RSA64889  Oxytheca emarginata F. W. Peirson 1922-5-21 3034 Riverside Hemet Valley, San Jacinto Mts. 1372 Comment
  RSA66236  Platystemon californicus F. W. Peirson 1922-5-21 3033 Riverside Along east side of Hemet Valley 1357 Comment
  RSA66779  Thysanocarpus curvipes var. curvipes F. W. Peirson 1922-5-21 3017 Riverside Hemet Valley. [Hemet Valley = Garner Valley -SDW] 1338 Comment
  RSA79805  Penstemon californicus F. W. Peirson 1922-5-21 3048 Riverside Hemet Valley, San Jacinto Mts. 1372 Comment
  CAS-BOT-BC185858  Vulpia octoflora var. hirtella Frank W. Peirson 1922-5-30 4333 Los Angeles West spur of Mt. Lowe, San Gabriel Mts. 1371 Comment
  CAS-BOT-BC209704  Ribes quercetorum Frank W. Peirson 1922-6-3 2548 Los Angeles East of Oakgrove Canon [Canyon] Divide, Liebre Mts. Comment
  RSA73317  Clarkia cylindrica subsp. cylindrica F. W. Peirson 1922-6-3 771 Los Angeles North slope of Liebre Mts. 1220 Comment
  RSA73356  Clarkia rhomboidea F. W. Peirson 1922-6-3 3087 Los Angeles At Collins Ranch, north slope of Liebre Mts. 1143 Comment
  RSA84378  Lithophragma bolanderi F. W. Peirson 1922-6-3 3079 Los Angeles At Collins Ranch, north slope of Liebre Mts. 1143 Comment
  JEPS61715  Calochortus splendens Frank W. Peirson 1922-6-4 3089 Los Angeles Soledad Canyon San Gabriel Mountains 457 Comment
  JEPS65131  Lupinus excubitus var. hallii F. W. Peirson 1922-6-4 3090 Los Angeles San Gabriel Mountain, Soledad Canyon Soledad Canyon; San Gabriel Mountain, Soledad Canyon 685 Comment
  PASA625  Juncus balticus Frank W. Peirson 1922-6-4 Los Angeles Soledad Canyon 457 Comment
  RSA366029  Scirpus microcarpus F. W. Peirson 1922-6-20 S- 097 San Bernardino 4 miles SE of San Bernardino. Comment
  CAS-BOT-BC196824  Lupinus breweri var. grandiflorus F. W. Peirson 1922-6-21 3129 San Bernardino Santa Ana River, San Bernardino Mts. 2164 Comment
  RSA70317  Juncus tiehmii F. W. Peirson 1922-6-21 3105 San Bernardino East of Big Meadows, upper Santa Ana River, San Bernardino Mountains 2165 Comment
  SD87697  Carex douglasii F. W. Peirson 1922-6-21 San Bernardino San Bernardino Mountains; east of Big Meadow; dry ground under pines. 2164 Comment
Read comments
Jul 11 2010
  RSA90223  Astragalus douglasii F. W. Peirson 1922-6-21 4754 San Bernardino Santa Ana River 2012 Comment
  RSA97445  Phoradendron juniperinum subsp. juniperinum F. W. Peirson 1922-6-21 3142 San Bernardino Cienega Seca Creek. 2134 Comment
  CAS-BOT-BC391196  Stellaria longipes subsp. longipes Frank W. Peirson 1922-6-22 3115 San Bernardino South Fork Santa Ana Meadows, San Bernardino Mts. 2377 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
  PASA1040  Veronica serpyllifolia var. humifusa Frank W. Peirson 1922-6-22 San Bernardino South Fork Santa Ana Meadows, San Bernardino Mts. 2346 Comment
  PASA1284  Stellaria longipes Frank W. Peirson 1922-6-22 San Bernardino South Fork Santa Ana River, San Bernardino Mts. 2377 Comment
  SD87847  Boechera retrofracta F. W. Peirson 1922-6-22 3135 San Bernardino San Bernardino Mountains, South Fork of Santa Ana River 2345 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
  RSA75942  Phacelia curvipes F. W. Peirson 1922-6-23 3130 San Bernardino Holcomb Creek, San Bernardino Mts 2515 Comment
  RSA95384  Sidalcea malviflora subsp. dolosa F. W. Peirson 1922-6-23 2056 San Bernardino Upper Holcomb Creek 2363 Comment
  RSA92303  Poa fendleriana F. W. Peirson 1922-6-23 4199 San Bernardino Summit of Sugarloaf Peak, San Bernardino Mts 2988 Comment
  CAS-BOT-BC439727  Claytonia parviflora subsp. viridis Frank W. Peirson 1922-6-24 604 San Bernardino San Bernardino Mts. Santa Ana Riv. 1920 Comment
  RSA65652  Claytonia parviflora subsp. tenuifolia F. W. Peirson 1922-6-24 604 San Bernardino Santa Ana River 1921 Comment
  PASA1726  Erigeron divergens Frank W. Peirson 1922-6-25 San Bernardino Barton Flats, San Bernardino Mts. 1981 Comment
  POM47614  Plagiobothrys collinus var. ursinus F. W. Peirson 1922-6-25 3118 San Bernardino Barton Flats Comment
  RSA90955  Erigeron divergens F. W. Peirson 1922-6-25 5294 San Bernardino Near Barton Flats, San Bernardino Mountains. 1982 Comment
  POM11238  Penstemon speciosus F. W. Peirson 1922-7-5 3193 Los Angeles Big Pines, Swartout [Swarthout] Valley, San Gabriel Mountains. Comment
  RSA67145  Galium parishii F. W. Peirson 1922-7-5 3158 Los Angeles North of Big Pines, sometimes called La Montaine, San Gabriel Mountains 2256 Comment
  RSA70526  Calochortus invenustus Frank W. Peirson 1922-7-5 3188 Los Angeles Mountain north of Big Pines 2286 Comment
  RSA72142  Gayophytum oligospermum F. W. Peirson 1922-7-5 4455 Los Angeles Big Pines. Northeast portion of San Gabriel Mountains. 2104 Comment
  RSA79870  Penstemon speciosus F. W. Peirson 1922-7-5 3193 Los Angeles Big Pines Meadow, north side of San Gabriel Mountains 2073 Comment
  UCR208206  Potentilla glandulosa subsp. nevadensis F. W. Peirson 1922-7-5 5249 Los Angeles San Gabriel Mountains, Big Pines, Swarthout Valley Comment
  JEPS8875  Chaenactis xantiana Frank W. Peirson 1922-7-5 3163 Los Angeles n of Big Pines (along Le Montaine Creek, from about 7000 ft to near the summit of ridge immeditaely facing the Mohave Desert); San Gabriel Mountains, Le Montaine Creek 2209 Comment
  RSA82519  Limosella acaulis F. W. Peirson 1922-7-5 3155 Los Angeles Big Pines, north slope of San Gabriel Mtns. 1860 Comment
  RSA94398  Chaenactis xantiana F. W. Peirson 1922-7-5 3163 Los Angeles Summit of Le Montaine, north of Big Pines, north side of San Gabriel Mountains 2209 Comment
  RSA97120  Cornus sericea subsp. sericea F. W. Peirson 1922-7-5 3186 San Bernardino 1.5 miles east of Big Pines, Swartout Valley (San Gabriel Mts.) 1981 Comment
  JEPS62190  Veratrum californicum var. californicum Frank W. Peirson 1922-7-6 3190 Los Angeles Big Pine Meadows San Gabriel Mountians 2087 Comment
  RSA70261  Juncus macrandrus F. W. Peirson 1922-7-6 3180 Los Angeles Big Pines Meadow, Swartout Valley Region, San Gabriel Mountains. 2088 Comment
  CAS-BOT-BC499744  Orobanche californica subsp. feudgei Frank W. Peirson 1922-7-6 s.n. Unknown Los Angeles or San Bernardino Co [ridge is in both]: Blue Ridge 2438 Comment
  RSA65820  Descurainia pinnata subsp. menziesii F. W. Peirson 1922-7-6 5329 Los Angeles Big Pines Camp 2088 Comment
  RSA81463  Castilleja applegatei subsp. martinii F. W. Peirson 1922-7-6 3182 Los Angeles Covering large areas of Blue Ridge, east end of San Gabriel Mts. near line between Los Angeles and San Bernardino counties. 2439 Comment
  JEPS36926  Artemisia ludoviciana subsp. incompta F. W. Peirson 1922-7-7 3197 Los Angeles Rangers Cabin San Gabriel Mts., Swartout Valley 1798 Comment
  RSA70052  Epipactis gigantea Frank W. Peirson 1922-7-7 5340 San Bernardino Rangers Cabin, Swarthout Valley, north side of San Gabriel Mountains/ W San Bernardino County. 1799 Comment
  POM13525  Centrostegia thurberi F. W. Peirson 1922-7-7 3172 Los Angeles Sheep Creek. North base of San Gabriel Mountains. 1448 Comment
  UC219126  Camelina microcarpa F. W. Peirson 1922-7-7 3181 Los Angeles San Gabriel Mountains, Swartout Valley, Ranger's Cabin Swartout Valley; San Gabriel Mountains, , Ranger's Cabin 1798 Comment
  RSA68618  Calochortus invenustus Frank W. Peirson 1922-7-18 s.n. San Bernardino Kelly's Cabin, Ontario Ridge, San Gabriel Mountains, west San Bernardino County. 2470 Comment
  RSA72343  Epilobium canum subsp. latifolium F. W. Peirson 1922-7-18 4115 San Bernardino Rocky outcrop along south edge of Ontario Peak Ridge. San Gabriel Mountains 2591 Comment
  RSA85779  Drymocallis glandulosa var. reflexa F. W. Peirson 1922-7-18 4181 San Bernardino Icehouse Canyon, San Gabriel Mountains 2317 Comment
  CAS-BOT-BC116601  Carex subfusca Frank Warrington Peirson 1922-7-21 4267 Los Angeles North slope of Baldy San Gabriel Mts. 2987 Comment
  PASA427  Rhamnus tomentella Frank W. Peirson 1922-7-29 Ventura Seymour Creek, Mt. Pinos Region 1828 Comment
  POM13658  Potentilla biennis F. W. Peirson 1922-7-29 3236 Ventura North Fork of Seymour Creek, Mt Pinos 1905 Comment
  RSA448210  Sidalcea malviflora subsp. sparsifolia F. W. Peirson 1922-7-29 4105 Ventura North Fork of Seymour Creek, Mt Pinos 1905 Comment
  RSA69683  Mentzelia montana F. W. Peirson 1922-7-29 3229 Ventura Seymour Creek, Mt. Pinos 1951 Comment
  RSA70416  Arctostaphylos parryana F. W. Peirson 1922-7-29 4725 Ventura Seymour Creek, Mt Pinos 1829 Comment
  RSA79785  Keckiella breviflora F. W. Peirson 1922-7-29 3237 Ventura Seymour Creek, Mt. Pinos. 1829 Comment
  RSA84230  Monardella linoides subsp. linoides F. W. Peirson 1922-7-29 3216 Ventura Seymour Creek, Mt. Pinos 1799 Comment
  SD87632  Cryptantha microstachys F. W. Peirson 1922-7-29 3234 Ventura Seymour Creek, Mount Pinos 1950 Comment
  RSA91747  Muhlenbergia rigens F. W. Peirson 1922-7-29 4326 Ventura Seymour Creek, Mt Pinos 1829 Comment
  RSA92185  Lagophylla ramosissima F. W. Peirson 1922-7-29 1359 Los Angeles grade SE of Quail Lake 1067 Comment
  RSA93907  Iva axillaris F. W. Peirson 1922-7-29 4235 Ventura Seymour Creek, Mt. Pinos 1799 Comment
  PASA2393  Clematis ligusticifolia Frank W. Peirson 1922-7-30 Ventura Seymour Creek, Mt. Pinos Region 1828 Comment
  UCR66533  Phlox douglasii F. W. Peirson 1922-7-30 3563 Ventura Mt. Pinos 2652 Comment
  POM12573  Ivesia santolinoides F. W. Peirson 1922-7-30 3233 Ventura Mount Pinos 2210 Comment
  RSA71914  Navarretia capillaris F. W. Peirson 1922-7-30 3224 Ventura Mt. Pinos. 2317 Comment
  RSA72158  Gayophytum racemosum F. W. Peirson 1922-7-30 3240 Ventura Mt. Pinos. 2561 Comment
  RSA91251  Lupinus breweri var. bryoides F. W. Peirson 1922-7-30 4422 Ventura Mt. Pinos. 2439 Comment
  SD87542  Navarretia capillaris F. W. Peirson 1922-7-30 3224 Ventura Mt. Pinos, dry stream depressions and about cienegas 2316 Comment
  SD87643  Eriogonum spergulinum var. reddingianum F. W. Peirson 1922-7-30 257 b Unknown Mt. Pinos Region 2362 Comment
  CAS-BOT-BC344246  Madia elegans Frank W. Peirson 1922-7-31 4240 Ventura Seymour Creek, Mt. Pinos Region 1828 Comment
  RSA66043  Eriogonum baileyi var. baileyi F. W. Peirson 1922-7-31 3243 Ventura Seymour Creek. 1829 Comment
  POM12575  Cyperus rotundus F. W. Peirson 1922-8-1 3265 Los Angeles Pasadena, High school grounds Comment
  RSA0101677  Botrychium simplex var. simplex Frank W. Peirson 1922-8-22 3272 San Bernardino South Fork of Santa Ana River, San Bernardino Mountains. 2560 Comment
  JEPS41301  Erigeron aphanactis var. congestus Frank W. Peirson 1922-8-23 San Bernardino Summit San Gorgonio Peak 3474 Comment
  RSA84360A  Ranunculus oxynotus F. W. Peirson 1922-8-23 4172 San Bernardino Summit of Mount San Gorgonio 3476 Comment
  RSA88813  Carex fracta F. W. Peirson 1922-8-25 3279 San Bernardino South Fork of Santa Ana River, San Bernardino Mountains. 2348 Comment
  RSA69986  Mirabilis pumila F. W. Peirson 1922-8-26 5217 San Bernardino Cienega Seca Creek 2378 Comment
  CAS-BOT-BC17374  Arabis pycnocarpa var. pycnocarpa Frank W. Peirson 1922-8-27 5326 San Bernardino San Bernardino Mountains. Santa Ana River. 1935 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
  RSA92086  Eleocharis bella F. W. Peirson 1922-8-27 3350 San Bernardino Barton Flats, San Bernardino Mountains. 1982 Comment
  CAS-BOT-BC100416  Brickellia californica Frank W. Peirson 1922-9-14 4732 Los Angeles Cascade [Canon] Canyon, San Antonio Region 1402 Comment
  RSA77509  Aralia californica F. W. Peirson 1922-9-14 4463 San Bernardino Cascade Canyon, fork of San Antonio Canyon 1371 Comment
  RSA453237  Prunus fremontii F. W. Peirson 1922-12-7 s.n. Riverside Andreas Canyon. 610 Comment
  CAS-BOT-BC299541  Ericameria paniculata Frank W. Peirson 1922-12-26 3331 Riverside Cabazon old road, Colorado Desert Comment
  RSA82390  Salvia vaseyi F. W. Peirson 1922-12-27 4060 Riverside On rough mountain slope between two forks of Andreas Canyon, near Palm Springs 610 Comment
  RSA85538  Cheilanthes viscida F. W. Peirson 1922-12-27 4295 Riverside On rough mountain slope between two forks of Andreas Canyon, near Palm Springs 609 Comment
  RSA86343  Juniperus californica F. W. Peirson 1922-12-27 3332 Riverside Between forks of Andreas Canyon, near Palm Springs 609 Comment
  RSA91320  Lupinus longifolius F. W. Peirson 1923-2-10 543 Los Angeles Laurel Canyon, Santa Monica Mts. Comment
  RSA69491  Mirabilis laevis var. crassifolia F. W. Peirson 1923-3-3 5220 San Bernardino Rough land east of Mentone. Comment
  RSA91201  Lupinus excubitus var. hallii F. W. Peirson 1923-3-23 4424 San Bernardino 1 mile east of Mentone. Comment
  RSA92647  Salix lasiolepis F. W. Peirson 1923-3-23 4293 San Bernardino River crossing about 4 miles southeast of San Bernardino. Comment
  RSA73085  Linanthus dianthiflorus subsp. dianthiflorus F. W. Peirson 1923-3-25 3369 Orange Aliso Creek, near Laguna Beach. Comment
  RSA82293  Scutellaria tuberosa F. W. Peirson 1923-3-25 3377 Orange Aliso Creek, near Laguna Beach. Near summit of a ridge about 200 ft. above the sea. 61 Comment
  POM175540  Zigadenus venenosus var. venenosus Frank W. Peirson 1923-3-26 4102 San Diego 1 mile South of Torrey Pines. La Jolla. Comment
  POM175545  Viguiera laciniata F. W. Peirson 1923-3-26 3364 San Diego 4 miles south of San Onofre Comment
  RSA70559  Croton californicus F. W. Peirson 1923-3-26 4438 San Diego Near Encinitas. Comment
  PASA2172  Amblyopappus pusillus Frank W. Peirson 1923-3-27 San Diego Imperial Beach Comment
  PASA2554  Delphinium parryi Frank W. Peirson 1923-3-27 3406 San Diego Imperial Beach 0 Comment
  RSA65347  Atriplex watsonii F. W. Peirson 1923-3-27 3413 San Diego Imperial Beach. Comment
  RSA77868  Pectocarya linearis subsp. ferocula F. W. Peirson 1923-3-27 3359 San Diego Summit of low hill about 6 miles north of San Diego on the inland route to Riverside. 122 Comment
  RSA87088  Lupinus concinnus subsp. concinnus F. W. Peirson 1923-3-27 3403 San Diego Summit of low hill about 6 miles north of San Diego on the inland route to Riverside. 122 Comment
  SD87699  Erigeron divergens F. W. Peirson 1923-3-27 3365 San Diego Otay Creek; 2 miles below Otay Dam Comment
  UCR129699  Triglochin maritima F. W. Peirson 1923-3-27 3391 San Diego South Coast, Imperial Beach 1 Comment
  RSA0075945  Heterotheca sessiliflora F. W. Peirson 1923-3-27 3368 San Diego Along back side of low sand dunes, Imperial Beach. Comment
  POM17786  Isoetes howellii F. W. Peirson 1923-3-28 3366 San Diego near boulevard on mesa about 6 miles north of San Diego 121 Comment
  RSA81008  Tamarix parviflora F. W. Peirson 1923-3-28 4110 San Diego On boulevard about 10-15 miles south opf Temecula Comment
  RSA92383  Psilocarphus brevissimus F. W. Peirson 1923-3-28 5279 San Diego About 6 miles north of San Diego 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
  UC566788  Sanicula arguta Frank W. Peirson 1923-4-9 3429 Los Angeles near Wilson Cove (San Clemente Island); San Clemente Island Comment
  CAS-BOT-BC217452  Galium catalinense Frank W. Peirson 1923-4-9 3432 Los Angeles North slope canyon at Lemmon Tank, San Clemente Island Comment
  POM18747  Chenopodium murale F. W. Peirson 1923-4-9 3481 Los Angeles San Clemente Island: Lemon Tank. Comment
  RSA90045  Lotus argophyllus subsp. ornithopus F. W. Peirson 1923-4-9 3468 Los Angeles San Clemente Island: about 2 miles SE of Wilson's cove Comment
  RSA95223  Stephanomeria blairii F. W. Peirson 1923-4-9 3475 Los Angeles San Clemente Island: at Lemon Tank Comment
  RSA85865  Cheilanthes newberryi F. W. Peirson 1923-4-10 3439 Los Angeles North slope canyon about 10 miles southeast of Wilson's Cove, San Clemente Island. Comment
  RSA80447  Mimulus guttatus F. W. Peirson 1923-4-10 3471 Los Angeles 5 mi. SE of Wilson Cove. Canyon about 5 mi. southeast of Eagle Ranch, San Clemente Island. Comment
Read comments
May 16 2008
  RSA90458  Lathyrus vestitus subsp. laetiflorus F. W. Peirson 1923-4-11 3455 Los Angeles San Clemente Island, canyon about 5 miles southeast of Eagle Ranch Comment
  UCD87952  Melica imperfecta F. W. Peirson 1923-4-12 3420 Los Angeles Wilsons Cove, San Clemente Island. Comment
  RSA70241  Allium praecox F. W. Peirson 1923-4-12 3486 Los Angeles Wilson s Cove, San Clemente Island Comment
  RSA91442  Trifolium gracilentum var. palmeri F. W. Peirson 1923-4-12 3436 Los Angeles Wilson's Cove, San Clemente Island. Comment
  RSA95030  Malacothrix foliosa F. W. Peirson 1923-4-12 3463 Los Angeles Wilson's Cove, San Clemente Island. Comment
  POM19056  Styrax redivivus F. W. Peirson 1923-5-5 3493 Orange Trabuco Canyon. 640 Comment
  RSA75439  Camissonia ignota F. W. Peirson 1923-5-6 3505 Orange Trail to Santiago Peak, Santa Ana Ms., from Trabuco Canyon. 1067 Comment
  RSA77721  Viola purpurea subsp. purpurea F. W. Peirson 1923-5-6 3498 Orange Summit of Santiago Peak, Santa Ana Mts. 1707 Comment
  SD82797  Ceanothus papillosus var. roweanus F. W. Peirson 1923-5-6 3492 Orange Trail from Trabuco Canyon to Santiago Peak, Santa Ana Mountains (in Holy Jim Canyon) 990 Comment
  JEPS41225  Mentzelia congesta Frank W. Peirson 1923-5-25 3523 Los Angeles San Gabriel Mountains, Rock Creek Comment
  JEPS8877  Chaenactis stevioides Frank W. Peirson 1923-5-25 3522 Los Angeles Rock Creek San Gabriel Mountains, Rock Creek 1295 Comment
  RSA84422  Aquilegia formosa F. W. Peirson 1923-5-25 4168 Los Angeles Rock Creek, north slope of San Gabriel Mountains 1296 Comment
  UCD88321  Melica stricta F. W. Peirson 1923-5-25 4250 Los Angeles Rock Creek, San Gabriel Mts. Comment
  RSA90863  Carex alma F. W. Peirson 1923-5-25 3526 Los Angeles along stream on south side of canyon of Rock Creek, San Gabriel Mountains. 1296 Comment
  RSA81467  Castilleja applegatei subsp. martinii F. W. Peirson 1923-5-26 4227 Los Angeles Rock Creek, norht slope of San Gabriel Mountains 1646 Comment
  RSA68691  Muilla maritima F. W. Peirson 1923-5-26 4100 Los Angeles Rock Creek, north slope of San Gabriel Mountains. 1601 Comment
  RSA90354  Lotus crassifolius var. crassifolius F. W. Peirson 1923-5-26 4075 Los Angeles Rock Creek, north slope of San Gabriel Mountains. 1890 Comment
  RSA92316  Poa secunda var. secunda F. W. Peirson 1923-5-26 3525 Los Angeles Rock Creek, norht slope of San Gabriel Mountains 1646 Comment
  JEPS43692  Clarkia xantiana Frank W. Peirson 1923-5-27 3535 Los Angeles Rock Creek San Gabriel Mts. 1295 Comment
  RSA73344  Clarkia xantiana subsp. parviflora F. W. Peirson 1923-5-27 3535 Los Angeles small canyon on Pinyon Ridge, Rock Creek, north slope of San Gabriel Mountains 1296 Comment
  RSA93225  Heterotheca sessiliflora subsp. bolanderi F. W. Peirson 1923-6-7 3891 Mendocino Coast near Little River. Comment
  PASA2377  Aesculus californica Frank W. Peirson 1923-6-9 Los Angeles Pine Canyon, Liebre Mts. 1188 Comment
  UC501463  Lessingia glandulifera var. peirsonii Frank W. Peirson 1923-6-9 3550 Los Angeles King Canyon Liebre Mts., King Canyon 1173 Comment
  CAS-BOT-BC123032  Lessingia lemmonii var. peirsonii Frank Warrington Peirson 1923-6-9 3550 Los Angeles Liebre Mts., Kings Canyon 1173 Comment
  CAS-BOT-BC221192  Calystegia malacophylla subsp. pedicellata Frank W. Peirson 1923-6-10 3555 Ventura Seymour Creek, Mt. Pinos 1798 Comment
  CAS-BOT-BC330357  Lessingia tenuis Frank W. Peirson 1923-6-10 s.n. Ventura Seymour Cr., Mt. Pinos Comment
  PASA189  Swertia neglecta Frank W. Peirson 1923-6-10 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
  RSA71115  Calystegia malacophylla subsp. pedicellata F. W. Peirson 1923-6-10 3555 Ventura Seymour Creek, Mt. Pinos. 1799 Comment
  RSA90747  Astragalus pachypus F. W. Peirson 1923-6-10 3584 Ventura Side Canyon, Seymour Creek, Mt. Pinos. 1829 Comment
  UC501592  Fritillaria pinetorum Frank W. Peirson 1923-6-11 3593 Ventura Mount Pinos 2286 Comment
  CAS-BOT-BC69161  Antennaria dimorpha F. W. Peirson 1923-6-11 3562 Ventura Mt. Pinos, near summit 2682 Comment
  RSA91191  Lupinus formosus F. W. Peirson 1923-6-11 3592 Ventura Seymour Creek, Mt. Pinos. 1905 Comment
  RSA98250  Oenanthe sarmentosa F. W. Peirson 1923-6-17 4055 Monterey 17-mile Drive, Monterey Peninsula Comment
  RSA91281  Lessingia pectinata var. pectinata F. W. Peirson 1923-6-26 5300 Monterey About 3 miles from Monterey on road to Salinas. Comment
  RSA94823  Hypochaeris radicata F. W. Peirson 1923-6-26 5287 Monterey About 3 miles from Monterey on road to Salinas. Comment
  CAS-BOT-BC257410  Chorizanthe pungens var. pungens Frank W. Peirson 1923-6-27 3707 Monterey Monterey Comment
  CAS-BOT-BC64554  Armeria maritima subsp. californica Frank W. Peirson 1923-6-27 3804 Monterey Monterey. Comment
  RSA75943  Phacelia malvifolia F. W. Peirson 1923-6-27 3819 Monterey 17-mile Drive. At south end near Carmel. Comment
  CAS-BOT-BC367561  Lasthenia minor Frank W. Peirson 1923-6-27 3916 Monterey Notrey's Landing, Coast, south of Carmel Comment
  PASA2216  Eriophyllum staechadifolium Frank W. Peirson 1923-6-27 Monterey Coast south of Pacific Grove [sea level] Comment
  RSA85201  Horkelia cuneata F. W. Peirson 1923-6-27 3746 Monterey 3 miles up the Salinas road from Monterey. Comment
  RSA92536  Eriophyllum staechadifolium F. W. Peirson 1923-6-27 3912 Monterey Sandy coast south of Pacific Grove Comment
  RSA93118  Corethrogyne filaginifolia var. californica F. W. Peirson 1923-6-27 3885 Monterey Sand dunes at Monterey Comment
  RSA93414  Monardella villosa F. W. Peirson 1923-6-27 3833 Monterey Coast near Pacific Grove Comment
  SD87772  Horkelia cuneata var. cuneata F. W. Peirson 1923-6-27 3746 Monterey At auto camp about 3 miles up the Salinas Road Comment
  RSA91763  Adenocaulon bicolor F. W. Peirson 1923-6-28 3894 Santa Cruz West slope of Santa Cruz Mts. Comment
  CAS-BOT-BC271459  Anisocarpus madioides Frank W. Peirson 1923-6-29 5283 Santa Cruz Along Boulevard, Santa Cruz Mts. Comment
  RSA68803  Delphinium nudicaule F. W. Peirson 1923-6-29 4169 Santa Cruz Santa Cruz Mts. Along boulevard near summit. Comment
  RSA92293  Eriophyllum lanatum var. achilleoides F. W. Peirson 1923-7-1 4242 Contra Costa Short distance below summit of Mt. Diablo Comment
  RSA73312  Clarkia rubicunda subsp. blasdalei F. W. Peirson 1923-7-4 3791 Alameda Strawberry Creek, Berkeley. Comment
  RSA74518  Phacelia nemoralis subsp. nemoralis F. W. Peirson 1923-7-4 3817 Alameda Strawberry Creek, Berkeley. Comment
  RSA80644  Boisduvalia glabella F. W. Peirson 1923-7-6 3788 Mendocino Indian Creek, southern Mendocino Co. Comment
  POM48479  Myrica californica F. W. Peirson 1923-7-7 3703 Mendocino 2 miles east of Mendocino City. Comment
  RSA100283  Campanula californica F. W. Peirson 1923-7-7 3866 Mendocino 1 mile north of Navarro River Comment
  RSA85830  Cupressus goveniana F. W. Peirson 1923-7-7 3637 Mendocino 2 miles east of Mendocino City. Comment
  UC501467  Bellis perennis Frank W. Peirson 1923-7-7 3889 Mendocino n of Westport Comment
  UC501615  Triteleia laxa Frank W. Peirson 1923-7-7 3679 Mendocino 5 mi nw Boonville Comment
  RSA0098125  Spergularia rubra F. W. Peirson 1923-7-7 s.n. Mendocino Navarro River, 10 miles below Wendling. Comment
  RSA100340  Triodanis biflora F. W. Peirson 1923-7-7 3870 Mendocino Navarro River, 10 miles below Wendling. Comment
  RSA64789  Chenopodium botrys F. W. Peirson 1923-7-7 3718 Mendocino Navarro River, 10 miles below Wendling. Comment
  RSA65091  Eriogonum nudum var. oblongifolium F. W. Peirson 1923-7-7 3710 Mendocino 3 miles southeast of Boonville Comment
  RSA69784  Gentiana oregana F. W. Peirson 1923-7-7 s.n. Mendocino 2 miles east of Mendocino City. Comment
  RSA85862  Blechnum spicant F. W. Peirson 1923-7-7 3631 Mendocino 2 miles east of Mendocino City. Comment
  RSA94178  Hemizonia luzulifolia F. W. Peirson 1923-7-7 3903 Mendocino 5 miles west of Boonville. Comment
  RSA94827  Cnicus benedictus F. W. Peirson 1923-7-7 3931 Mendocino Field borders, Indian Creek Comment
  RSA95042  Senecio sylvaticus F. W. Peirson 1923-7-7 3968 Mendocino 2 miles below Wendling. Comment
  RSA95201  Sidalcea calycosa subsp. rhizomata F. W. Peirson 1923-7-7 3773 Mendocino 1 mile north of Navarro River Comment
  SEINET10463950  Campanula californica Frank W. Peirson 1923-7-7 Peirson 3866 Mendocino Wet roadside on coast 1 miles north of Navarro River Comment
  RSA86528  Picea sitchensis F. W. Peirson 1923-7-8 3963 Mendocino 5 miles north of Mendocino City. Comment
  RSA72648  Wyethia angustifolia F. W. Peirson 1923-7-8 3896 Mendocino Along fence in N part of Mendocino City. Comment
  RSA94425  Chrysanthemum segetum F. W. Peirson 1923-7-8 3908 Mendocino 5 miles north of Mendocino City Comment
  RSA70055  Epipactis gigantea Frank W. Peirson 1923-7-9 3697 Humboldt State Park on Eel River Comment
  RSA94822  Hypochaeris glabra F. W. Peirson 1923-7-9 3934 Humboldt State Park on Eel River Comment
  RSA95171  Hieracium albiflorum F. W. Peirson 1923-7-9 3938 Mendocino Summit of first grade north of Westport. Comment
  RSA87079  Lupinus vallicola subsp. apricus F. W. Peirson 1923-7-10 4221 Humboldt Garberville Comment
  RSA93304  Downingia elegans var. corymbosa F. W. Peirson 1923-7-10 3871 Humboldt Wood border opening near road about 6 miles N of Garberville Comment
  RSA71112  Calystegia soldanella F. W. Peirson 1923-7-11 3805 Humboldt 18 miles north of Eureka Comment
  RSA80042  Veronica scutellata F. W. Peirson 1923-7-11 3838 Humboldt 7 miles N of Arcata. Comment
  RSA80294  Orthocarpus faucibarbatus F. W. Peirson, Mabel B. Peirson 1923-7-11 3849 Humboldt 7 miles N of Arcata. Comment
  UC501613  Veronica scutellata Frank W. Peirson 1923-7-11 3838 Humboldt 7 mi n of Arcata Comment
  RSA0116954  Camassia leichtlinii subsp. suksdorfii Frank W. Peirson 1923-7-11 3681 Humboldt 7 miles north of Arcata. Comment
  RSA68979  Plantago maritima F. W. Peirson 1923-7-11 3857 Humboldt Flats north of Eureka. Comment
  RSA72004  Phlox diffusa subsp. subcarinata F. W. Peirson 1923-7-11 3563 Ventura Mt. Pinos. 2652 Comment
  RSA90281  Lathyrus littoralis F. W. Peirson 1923-7-11 3623 Humboldt 18 miles north of Eureka. Comment
  RSA92250  Layia carnosa F. W. Peirson 1923-7-11 3905 Humboldt 18 miles north of Eureka Comment
  RSA68707  Lilium pardalinum subsp. vollmeri Frank W. Peirson 1923-7-12 3688 Del Norte 15 miles south of Crescent City Comment
  RSA70604  Iris douglasiana Frank W. Peirson 1923-7-12 3692 Humboldt About 5 miles north of Orick Comment
  RSA77511  Hippuris vulgaris F. W. Peirson 1923-7-12 3784 Del Norte in marsh a mile or So S of Crescent City, Del Norte County Comment
  RSA85042  Polystichum munitum F. W. Peirson 1923-7-12 3633 Del Norte ? miles northeast of Crescent City. Comment
  RSA68716  Lilium maritimum Frank W. Peirson 1923-7-13 3690 Del Norte 4 miles northeast of Gasquet Comment
  RSA87154  Quercus vacciniifolia F. W. Peirson 1923-7-13 3702 Del Norte 7 miles north of 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
  RSA73296  Linanthus pungens subsp. hookeri F. W. Peirson 1923-7-19 3809 Siskiyou Road crossing over Whitney Creek, foot of Mt. Shasta Comment
  RSA74810  Nama lobbii F. W. Peirson 1923-7-19 3821 Siskiyou Whitney Creek at the foot of Mt. Shasta. Comment
  RSA93191  Erigeron elegantulus F. W. Peirson 1923-7-19 3873 Siskiyou 17 miles north of Bray Comment
  RSA94751  Senecio streptanthifolius F. W. Peirson 1923-7-19 3922 Siskiyou Lairds Landing Comment
  RSA95063  Hemizonia fitchii F. W. Peirson 1923-7-21 3901 Butte North of Chico. Comment
  RSA90447  Glycyrrhiza lepidota F. W. Peirson 1923-7-24 8411 Santa Clara Coast Boulevard crossing of the Pajaro River. Comment
  RSA68958  Plantago maritima F. W. Peirson 1923-7-27 3856 Monterey near Pacific Grove, low sea bluffs Comment
  PASA1098  Lotus micranthus Frank W. Peirson 1923-7-29 Santa Clara Santa Cruz Mts. Road from Santa Cruz to Los Gatos slightly east of summit Comment
  RSA100551  Campanula prenanthoides F. W. Peirson 1923-7-29 3868 Santa Cruz Along blvd slightly east of summit of Santa Cruz Mts. Comment
  RSA72345  Epilobium canum subsp. latifolium F. W. Peirson 1923-8-21 7344 San Bernardino Small canyon back of Forest Home 1829 Comment
  RSA88756  Carex alma F. W. Peirson 1923-8-22 3974 San Bernardino Vivian Creek, San Bernardino Mountains 2195 Comment
  CAS-BOT-BC31162  Carex lemmonii Frank W. Peirson 1923-8-23 3970 San Bernardino High Creek, San Bernardino Mts. Comment
  JEPS51152  Stellaria calycantha Frank W. Peirson 1923-8-23 4158 San Bernardino High Creek; San Bernardino Mts. Comment
  RSA88806  Carex abrupta F. W. Peirson 1923-8-23 3973 San Bernardino High Creek, San Bernardino Mountains. 2774 Comment
  CAS-BOT-BC363637  Senecio fremontii var. occidentalis Frank W. Peirson 1923-8-24 3994 San Bernardino San Bernaridno Mts. Summit San Gorgonio Peak Comment
  UC672181  Erigeron aphanactis var. congestus Frank W. Peirson 1923-8-24 1284 San Bernardino Summit San Gorgonio Peak 3490 Comment
  RSA68999  Samolus parviflorus F. W. Peirson 1923-8-26 s.n. San Bernardino above road to Seven Oaks, in Mill Creek. 1220 Comment
  RSA65342  Atriplex rosea F. W. Peirson 1923-8-30 4009 San Bernardino Northeast part of San Gabriel Mts., Lone Pine Canyon, Clyde Ranch. 1479 Comment
  RSA70315  Juncus xiphioides F. W. Peirson 1923-8-30 4024 San Bernardino Clyde Ranch, Lone Pine Canyon. Eastern San Gabriel Mountains, west San Bernardino County 1494 Comment
  RSA82250  Castilleja miniata subsp. miniata F. W. Peirson 1923-8-30 4021 San Bernardino Clyde Ranch, Lone Pine Canyon. Eastern San Gabriel Mountains, west San Bernardino County 1494 Comment
  UCR158046  Helianthus nuttallii subsp. nuttallii F. W. Peirson 1923-8-30 4022 San Bernardino Transverse Ranges: Eastern San Gabriel Mountains, Clyde Ranch, Lone Pine Canyon 1494 Comment
  JEPS36550  Pleiacanthus spinosus Frank W. Peirson 1923-8-31 4007 Los Angeles Blue Ridge, San Gabriel Mountains San Gabriel Mountains, Blue Ridge Comment
  RSA85236  Horkelia bolanderi F. W. Peirson 1923-8-31 4026 Los Angeles Earthquake rift, 2 miles W of Big Pines, N face of San Gabriel Mts. 1860 Comment
  RSA64585  Eriogonum pusillum F. W. Peirson 1923-8-31 4006 Los Angeles Blue Ridge, eastern San Gabriel Mountains near line between Los Angeles and San Bernardino counties. 2591 Comment
  JEPS56555  Eriogonum plumatella Frank W. Peirson 1923-9-1 4002 Los Angeles Sheep Creek San Gabriel Mountains 1584 Comment
Read comments
Dec 11 2014
  RSA83320  Monardella linoides subsp. erecta F. W. Peirson 1923-9-1 5167 San Bernardino between Double and Holcomb Valley, San Bernardino Mts. 2226 Comment
  RSA91274  Isocoma menziesii F. W. Peirson 1923-9-6 4034 San Bernardino Roadside and fields S of Chhino Comment
  RSA92102  Cyperus esculentus F. W. Peirson 1923-9-6 4032 Orange Along canal east of Olive. Comment
  CAS-BOT-BC32931  Corethrogyne filaginifolia var. filaginifolia Frank Warrington Peirson 1923-10-7 4159 Los Angeles San Gabriel Mts. Newhall, Railroad Station Comment
  RSA65345  Atriplex serenana F. W. Peirson 1923-10-7 4162 Los Angeles Bouquet Canyon, where Los Angeles Aqueduct crosses Santa Clara River. Comment
  RSA95079  Microseris sylvatica F. W. Peirson 1924-3-19 5491 Kern north slope of Tehachapi Pass. 610 Comment
  POM47642  Hesperocnide tenella F. W. Peirson 1924-5-14 4547 San Bernardino 12 miles east of Victorville. Comment
  RSA93346  Xylorhiza tortifolia F. W. Peirson 1924-5-14 4575 San Bernardino Box S Springs in Cushenberry [Cushenbury] Springs Region, north base of San Bernardino Mountains. 1082 Comment
  RSA94673  Senecio douglasii var. monoensis F. W. Peirson 1924-5-14 4580 San Bernardino Box S Springs in Cushenberry [Cushenbury] Springs Region, north base of San Bernardino Mountains. 1082 Comment
  SD87572  Aliciella leptomeria F. W. Peirson 1924-5-14 4577 San Bernardino 21 miles east of Victorville. Comment
  CAS-BOT-BC64024  Anisocoma acaulis Frank W. Peirson 1924-5-14 4608 Los Angeles Near Summit Cajon Pass Comment
  RSA94600  Anisocoma acaulis F. W. Peirson 1924-5-14 4608 San Bernardino South side of Cajon Pass. 1220 Comment
  CAS-BOT-BC143421  Ivesia saxosa F. W. Peirson 1924-5-15 4605 San Bernardino Cactus Flat, San Bernardino Mts. 1798 Comment
  CAS-BOT-BC297168  Erigeron concinnus var. concinnus Frank W. Peirson 1924-5-15 4572 San Bernardino N. end of Baldwin Lake, San Bernardino Mts. Comment
  PASA2633  Ranunculus californicus var. ludovicianus Frank W. Peirson 1924-5-15 4560 San Bernardino Baldwin Lake, San Bernadino Mtns. 2035 Comment
  POM47645  Astragalus purshii var. lectulus F. W. Peirson 1924-5-15 4567 San Bernardino Summit above Doble, San Bernardino Mountains 2100 Comment
  RSA93742  Aster frondosus F. W. Peirson 1924-5-15 4595 San Bernardino North end of Baldwin Lake 2037 Comment
  RSA91921  Poa secunda F. W. Peirson 1924-5-15 4539 San Bernardino N end of Baldwin Lake, San Bernardino Mts 2058 Comment
  RSA86846  Prunus emarginata F. W. Peirson 1924-5-16 4615 San Bernardino Bear Lake Dam. 2043 Comment
  RSA87191  Lupinus excubitus var. johnstonii F. W. Peirson 1924-5-27 4637 Los Angeles Strawberry Peak, San Gabriel Mountains. Comment
  UCR129355  Heuchera elegans F. W. Peirson 1924-5-27 4639 Los Angeles San Gabriel Mtns., north slope, Strawberry Peak 1753 Comment
  RSA0063244  Heuchera elegans F. W. Peirson 1924-5-27 4639 Los Angeles San Gabriel Mountains. North slope, Strawberry Peak. 1753 Comment
  RSA65046  Silene lemmonii F. W. Peirson 1924-5-27 4624 Los Angeles north slope of Strawberry Peak, San Bernardino Mts. 1524 Comment
  RSA91467  Scirpus microcarpus F. W. Peirson 1924-5-27 4636 Los Angeles Colby's Ranch 975 Comment
  RSA95251  Taraxacum officinale F. W. Peirson 1924-5-27 4679 Los Angeles Colby's Ranch 975 Comment
  UC908733  Collomia grandiflora Frank W. Peirson 1924-5-28 4634 Los Angeles Tujunga Canyon 457 Comment
  POM48463  Dudleya edulis F. W. Peirson 1924-5-31 4674 Orange 5 miles southeast of Laguna Beach. Comment
  RSA68988  Plantago ovata var. insularis F. W. Peirson 1924-5-31 4668 Orange 5 miles southeast of Laguna Beach. Comment
  RSA71016  Cressa truxillensis F. W. Peirson 1924-5-31 4647 Orange Laguna Canyon, near Laguna Beach. 106 Comment
  RSA85842  Marsilea vestita F. W. Peirson 1924-5-31 4645 Orange Laguna Canyon, near Laguna Beach 106 Comment
  UCR143159  Chaenactis glabriuscula var. orcuttiana F. W. Peirson 1924-5-31 4671 Orange Coastal Plains and Basins; South Coastal Plains region, 5 miles southeast of Laguna Beach Comment
  POM47667  Leymus triticoides F. W. Peirson 1924-6-1 4678 Riverside River lands along Santa Ana River. 152 Comment
  POM49370  Stachys stebbinsii F. W. Peirson 1924-6-2 s.n. Riverside Near foot of Temescal canyon. Comment
  RSA79782  Keckiella cordifolia F. W. Peirson 1924-6-16 4748 Los Angeles Kineloa Road, Eaton Canyon foothills, San Gabriel Mountains. Comment
  CAS-BOT-BC191305  Chorizanthe fimbriata var. fimbriata Frank W. Peirson 1924-6-21 4763 San Diego Grade N of Pala 228 Comment
  RSA409772  Cuscuta salina F. W. Peirson 1924-6-21 s.n. Riverside South of Elsinore Comment
  RSA73129  Navarretia atractyloides F. W. Peirson 1924-6-21 4769 San Diego Benches southeast of Pala 244 Comment
  RSA82574  Stachys rigida subsp. quercetorum F. W. Peirson 1924-6-21 4759 Riverside Temescal Canyon. 290 Comment
  RSA0087147  Centromadia pungens subsp. laevis F. W. Peirson 1924-6-21 4762 Riverside Near Temecula. 335 Comment
  PASA429  Hypericum formosum Frank W. Peirson 1924-6-22 San Diego Palomar Mt., near the Country Club 1584 Comment
  RSA65657  Montia fontana F. W. Peirson 1924-6-22 s.n. San Diego Near head of Doane Valley, Palomar Mts., San Diego Co., California. 1585 Comment
  RSA68768  Delphinium cardinale F. W. Peirson 1924-6-22 s.n. San Diego At Country Club, Palomar Mts. 1616 Comment
  RSA70537  Chamaesyce serpillifolia subsp. hirtula F. W. Peirson 1924-6-22 4777 San Diego Near the Country Club, Palomar Mountains. 1585 Comment
  RSA86791  Rosa gymnocarpa F. W. Peirson 1924-6-22 4806 San Diego Doane Valley. 1494 Comment
  RSA498327  Lotus heermannii F. W. Peirson 1924-6-23 s.n. San Diego Upper Doane Valley Palomar 1494 Comment
  UC501617  Brodiaea terrestris subsp. kernensis Frank W. Peirson 1924-6-23 4811 San Diego meadows at head Doane Valley; Palomar Mt. 1524 Comment
  RSA368918  Lilaea scilloides F. W. Peirson 1924-6-24 4880 San Diego Cuyamaca Lake. Comment
  RSA77753  Viola lobata F. W. Peirson 1924-6-24 4824 San Diego dry slope under pines, Scenic View, 5 mi. north of Cuyamaca Lake on road to Julian. 1448 Comment
  RSA97154  Lomatium dasycarpum subsp. dasycarpum F. W. Peirson 1924-6-24 4821 San Diego Henshaw Grade, Palomar Mts. 1219 Comment
  RSA65066  Silene verecunda subsp. platyota F. W. Peirson 1924-6-25 4832 San Diego Above camp [Laguna Camp?], Laguna Lakes Region, Laguna Mountains. Comment
  RSA70131  Brodiaea terrestris subsp. kernensis F. W. Peirson 1924-6-25 4834 San Diego near old Rangers Cabin, Laguna Lakes region, Laguna Mtns. Comment
  RSA71947  Collomia grandiflora F. W. Peirson 1924-6-25 4839 San Diego Laguna Mts., Laguna Lakes Region, near auto camp. 1829 Comment
  RSA79963  Cryptantha micrantha var. lepida F. W. Peirson 1924-6-25 4849 San Diego Above camp [Laguna Camp?], Laguna Lakes Region, Laguna Mountains. Comment
  RSA87067  Koeleria macrantha F. W. Peirson 1924-6-25 4850 San Diego Laguna Lakes 1829 Comment
  RSA0074140  Alopecurus aequalis F. W. Peirson 1924-6-25 4840 San Diego Margin of Little Lake, Laguna Mts. Comment
  RSA90957  Erigeron divergens F. W. Peirson 1924-6-25 4845 San Diego Above camp [Laguna Camp?], Laguna Lakes Region, Laguna Mountains. Comment
  RSA92382  Psilocarphus brevissimus F. W. Peirson 1924-6-25 4835 San Diego near old Rangers Cabin, Laguna Lakes region, Laguna Mtns. Comment
  RSA69607  Boerhavia coccinea F. W. Peirson 1924-6-26 4876 San Diego Lower part of Vallecito Canyon. Comment
  CAS-BOT-BC330265  Pentachaeta aurea F. W. Peirson 1924-6-27 4863 San Diego Laguna Mts., at camp, Laguna Lakes Region Comment
  POM47630  Arctostaphylos glandulosa subsp. adamsii F. W. Peirson 1924-6-27 4884 San Diego Monument Peak, Laguna Mts. Comment
  RSA84267  Ranunculus aquatilis var. capillaceus F. W. Peirson 1924-6-27 4864 San Diego ponds at Laguna Lakes 1524 Comment
  RSA97294  Garrya fremontii F. W. Peirson 1924-6-27 4886 San Diego Monument Peak, Laguna Mts. Comment
  RSA92679  Eriophyllum lanatum var. obovatum F. W. Peirson 1924-7-5 4906 San Bernardino Bluff Lake, San Bernardino Mountains. 2287 Comment
  RSA68646  Calochortus palmeri var. palmeri Frank W. Peirson 1924-7-6 4923 San Bernardino North shore of Bear Lake (Nr its West end) 2042 Comment
  RSA83430  Satureja mimuloides F. W. Peirson 1924-7-8 5394 Los Angeles 2.5 miles below Switzer s Camp, San Gabriel Mts, above Pasadena. 671 Comment
  POM365418  Polemonium occidentale F. W. Peirson 1924-7-13 s.n. San Bernardino South fork of the Santa Ana Meadow 2530 Comment
  RSA65020  Silene menziesii subsp. dorrii F. W. Peirson 1924-7-13 4939 San Bernardino Fish Creek. 2134 Comment
  RSA72130  Epilobium ciliatum subsp. ciliatum F. W. Peirson 1924-7-13 4947 San Bernardino South Fork of Mission Creek; San Bernardino Mountains 2439 Comment
  RSA92658  Eriophyllum confertiflorum F. W. Peirson 1924-7-13 4945 San Bernardino Divide between Fish and Mission Creeks 2530 Comment
  RSA83987  Saxifraga odontoloma F. W. Peirson 1924-7-14 4949 San Bernardino Lost Creek, San Bernardino Mountains. 2210 Comment
  RSA65466  Rumex salicifolius F. W. Peirson 1924-7-14 4955 San Bernardino Lost Creek. 2363 Comment
  RSA81445  Castilleja applegatei F. W. Peirson 1924-7-15 4966 San Bernardino Coon Creek Divide, San Bernardino Mts. 2439 Comment
  RSA82527  Verbascum thapsus F. W. Peirson 1924-7-26 4978 San Bernardino Little San Gorgonio Creek, Oak Glen region. 1220 Comment
  JEPS49608  Philadelphus microphyllus var. stramineus Frank W. Peirson 1924-7-27 4991 Riverside Dark Canyon, Mt. San Jacinto. 2286 Comment
  PASA2373  Euonymus parishii Frank W. Peirson 1924-7-27 Riverside Dark Canyon, San Jacinto Mts. 1767 Comment
  RSA70053  Epipactis gigantea Frank W. Peirson 1924-7-27 4984 Riverside Dark Canyon, San Jacinto Mountains. 1799 Comment
  RSA88679  Carex lemmonii F. W. Peirson 1924-7-27 6024 Riverside Deer Spring, Dark Canyon, San Jacinto Mountains. 2439 Comment
  RSA0018963  Thalictrum fendleri var. fendleri F. W. Peirson 1924-7-27 4995 Riverside Deer Springs, San Jacinto Mtns. 2668 Comment
  CAS-BOT-BC101306  Corethrogyne filaginifolia Frank W. Peirson 1924-7-28 5017 Riverside Pine Flats Camp, San Jacinto Mts. 1798 Comment
  CAS-BOT-BC268189  Eriogonum umbellatum var. munzii Frank W. Peirson 1924-7-28 5014 Riverside Pine Flats Camp, San Jacinto Mts. 1798 Comment
  RSA72167  Epilobium ciliatum subsp. ciliatum F. W. Peirson 1924-7-28 5012 Riverside Pine Flats Camp 1799 Comment
  RSA91118  Trifolium monanthum subsp. grantianum F. W. Peirson 1924-7-28 5016 Riverside Pine flats Camp, San Jacinto Mts. 1799 Comment
  RSA66014  Eriogonum nudum var. pauciflorum F. W. Peirson 1924-7-29 5035 Riverside Banning to Idyllwild Rd. 1555 Comment
  RSA71003  Cuscuta ceanothi F. W. Peirson 1924-7-29 5036 Riverside Banning to Idyllwild Rd. 1555 Comment
  RSA77439  Angelica tomentosa F. W. Peirson 1924-7-29 5024 Riverside Open Mountain slope on road from Banning to Idyllwild, San Jacinto Mountains. 1677 Comment
  RSA92107  Cyperus squarrosus F. W. Peirson 1924-7-29 5031 Riverside Banning to Idyllwild road, San Jacinto Mountains. 1570 Comment
  RSA464930  Fraxinus velutina F. W. Peirson 1924-8-23 s.n. Los Angeles W fork San Gabriel River, just above forks Comment
  PASA1878  Lythrum californicum Frank W. Peirson 1924-8-29 Orange 4 miles south of Santa Ana Comment
  RSA65358  Atriplex canescens F. W. Peirson 1924-8-29 4528 Orange Corona Del Mar Comment
  RSA70016  Suaeda esteroa F. W. Peirson 1924-8-29 5082 Orange 2.5 miles from Balboa on road inland along creek. Comment
  RSA64759  Chenopodium ambrosioides var. ambrosioides F. W. Peirson 1924-8-29 5079 Orange 6 miles from Balboa on road inland along creek. Comment
  RSA70021  Suaeda calceoliformis F. W. Peirson 1924-8-29 5078 Orange 3 miles from Balboa inland along creek Comment
  RSA91899  Paspalum distichum F. W. Peirson 1924-8-29 5096 Orange Road from Artesia to Hungtington Beach, along ditch Comment
  RSA92200  Jaumea carnosa F. W. Peirson 1924-8-29 5076 Orange 3 miles from Balboa Beach. Comment
  PASA1737  Gutierrezia lucida Frank W. Peirson 1924-8-31 San Bernardino Box S. Spring 1081 Comment
  RSA64900  Eriogonum plumatella F. W. Peirson 1924-8-31 5104 San Bernardino Roadside, 2 miles N of Cajon Pass, S Mojave Desert 1159 Comment
  RSA65379  Atriplex lentiformis F. W. Peirson 1924-8-31 s.n. San Bernardino Victorville, Mojave Desert. 793 Comment
  RSA84263  Azolla filiculoides Frank W. Peirson 1924-8-31 5109 San Bernardino South of Victorville 792 Comment
  UCR70730  Solidago confinis F. W. Peirson 1924-8-31 5133 San Bernardino Mojave Desert, Box 'S' Spring, near Cushenbury Spring 1082 Comment
  RSA92153  Eleocharis parishii F. W. Peirson 1924-8-31 5129 San Bernardino Box S Springs, southern Mojave Desert 1082 Comment
  RSA92406  Bidens laevis F. W. Peirson 1924-8-31 5108 San Bernardino South of Victorville. 792 Comment
  RSA93320  Machaeranthera carnosa F. W. Peirson 1924-8-31 5131 San Bernardino Box S Springs, north base of San Bernardino Mountains. 1082 Comment
  RSA94198  Artemisia ludoviciana subsp. incompta F. W. Peirson 1924-8-31 5118 San Bernardino Along ponds south of Victorville 793 Comment
  CAS-BOT-BC294433  Ericameria parryi var. aspera F. W. Peirson 1924-9-1 5168 San Bernardino Near Arrastre Flat, Holcomb Valley, San Bernardino Mts. 2286 Comment
  RSA65784  Cleomella plocasperma F. W. Peirson 1924-9-1 5137 San Bernardino Open land above Box S Spring, grade near Cushenberry Spring. north base of San Bernardino Mountains. 1128 Comment
  CAS-BOT-BC112009  Schoenus nigricans Frank Warrington Peirson 1924-9-2 5199 San Bernardino Arrowhead Hot Springs, San Bernardino Mts. 579 Comment
  CAS-BOT-BC140298  Ivesia santolinoides F. W. Peirson 1924-9-2 5177 San Bernardino Fish Camp, Fish Creek, 1 to 2 mi. west along blvd. from point where it joins Bear Creek Basin, San Bernardino 2057 Comment
  PASA430  Hypericum formosum Frank W. Peirson 1924-9-2 San Bernardino Fish Camp (City Creek Road), San Bernardino Mts. 2057 Comment
  POM351951  Chrysothamnus nauseosus subsp. bernardinus F. W. Peirson 1924-9-2 3176 San Bernardino Fish Camp. 2058 Comment
  RSA70852  Arctostaphylos glandulosa subsp. glaucomollis F. W. Peirson 1924-9-2 5196 San Bernardino City Creek Road, San Bernardino Mts. 1524 Comment
  RSA80366  Perideridia parishii subsp. parishii F. W. Peirson 1924-9-2 5185 San Bernardino Fish Camp. 2058 Comment
  RSA87065  Imperata brevifolia F. W. Peirson 1924-9-2 5201 San Bernardino Arrowhead Hot Springs. 579 Comment
  RSA90907  Chrysothamnus nauseosus subsp. bernardinus F. W. Peirson 1924-9-2 5176 San Bernardino Fish Camp. 2058 Comment
  RSA92148  Fimbristylis thermalis F. W. Peirson 1924-9-2 5200 San Bernardino Arrowhead Hot Springs. 579 Comment
Read comments
Dec 24 2010
  RSA91745  Muhlenbergia rigens F. W. Peirson 1924-9-2 5195 San Bernardino Near road to Deep Creek on City Creek Road. 1829 Comment
  RSA93779  Lobelia cardinalis subsp. graminea F. W. Peirson 1924-9-2 5204 San Bernardino Marshes on Santa Ana River, about 2 miles south of San Bernardino. Comment
  POM48465  Nitrophila occidentalis F. W. Peirson 1924-10-19 5229 Los Angeles Clearwater. Comment
  RSA69944  Nitrophila occidentalis F. W. Peirson 1924-10-19 5229 Los Angeles Clearwater. Comment
  SD87612  Symphyotrichum subulatum var. parviflorum F. W. Peirson 1924-10-19 5240 Orange Wintersberg Comment
  CAS-BOT-BC113821  Cyperus niger var. capitatus Frank Warrington Peirson 1924-10-19 5231 Orange Along edge of water in ditch, Wintersberg. Comment
  RSA70402  Chamaesyce serpillifolia F. W. Peirson 1924-10-19 5236 Orange Wintersberg Comment
  RSA91008  Conyza canadensis F. W. Peirson 1924-10-19 5242 Orange Wintersberg. Comment
  RSA93166  Baccharis emoryi F. W. Peirson 1924-10-19 5228 Los Angeles Clearwater. Comment
  RSA93743  Aster subulatus var. ligulatus F. W. Peirson 1924-10-19 5240 Orange Wintersberg Comment
  RSA71002  Cuscuta ceanothi F. W. Peirson 1924-10-26 5261 Los Angeles Arroyo Seco, about 0.5 mile below California Street, Pasadena, 198 Comment
  RSA84262  Azolla filiculoides Frank W. Peirson 1924-10-26 5257 Los Angeles Arroyo Seco, about 0.5 mile below California Street, Pasadena, 198 Comment
  RSA93916  Xanthium strumarium F. W. Peirson 1924-10-26 5264 Los Angeles Arroyo Seco, below California St. bridge, Pasadena 198 Comment
  RSA92643  Salix lasiolepis F. W. Peirson 1924-12-3 9604 Los Angeles San Gabriel Wash at Foothill Boulevard, Azusa. Comment
  RSA70535  Chamaesyce melanadenia F. W. Peirson 1924-12-5 5380 Los Angeles Large colony on open bank above trail; Little Samnta Anita Canyon. Comment
  RSA90166  Astragalus lentiginosus var. borreganus F. W. Peirson 1924-12-29 5402 Riverside Near Garnet, northeast of Palm Springs Comment
  PASA617  Cyperus laevigatus Frank W. Peirson 1924-12-30 Riverside Thousand Palms Canyon 121 Comment
Read comments
Jun 24 2016
  RSA65363  Atriplex canescens var. laciniata F. W. Peirson 1924-12-30 s.n. Riverside Thousand Palms Canyon, Coachella Valley. 122 Comment
  RSA69420  Eustoma exaltatum F. W. Peirson 1924-12-30 5419 Riverside Thousand-Palms Canyon, Colorado Desert 122 Comment
  RSA69917  Asclepias subulata F. W. Peirson 1924-12-30 5420 Riverside Near mouth of Thousand Palms Canyon, Coachella Valley 91 Comment
  UC501500  Dicoria canescens Frank W. Peirson 1924-12-30 5425 Riverside 1000 Palms Canyon 121 Comment
  RSA93201  Baccharis salicifolia F. W. Peirson 1924-12-30 5424 Riverside Thousand-Palms Canyon, Colorado Desert 122 Comment
  RSA65018  Silene menziesii subsp. dorrii F. W. Peirson 1925-1-25 6058 Mono Rock Creek. 2073 Comment
  RSA92715  Salix lucida subsp. lasiandra Mabel Peirson 1925-3-1 9605 Los Angeles Arroyo Seco, west of Pasadena Comment
  RSA90225  Astragalus douglasii F. W. Peirson 1925-3-18 5495 Kern North slope of Tehachapa Pass. 762 Comment
  RSA91779  Ericameria linearifolia F. W. Peirson 1925-3-18 5473 Kern South slope of Tehachapi Mts., Tehachapi Pass. Comment
Read comments
Mar 27 2011
  CAS-BOT-BC29895  Achyrachaena mollis F. W. Peirson 1925-3-19 5502 Kern north slope of Tehachapi 457 Comment
  RSA69704  Mentzelia affinis F. W. Peirson 1925-3-19 5526 Kern Caliente near north base of Tehachapi Mountains. Comment
  RSA73684  Leptosiphon bicolor F. W. Peirson 1925-3-19 5508 Kern North slope of Tehachapi Mountains. 457 Comment
Read comments
Mar 27 2011
  RSA74149  Phacelia tanacetifolia F. W. Peirson 1925-3-19 5516 Kern Caliente Creek near foot of Tehachapi Grade 457 Comment
  RSA75870  Nemophila menziesii F. W. Peirson 1925-3-19 5478 Kern North slope of Tehachapi Pass. 610 Comment
  RSA77870  Pectocarya penicillata F. W. Peirson 1925-3-19 5515 Kern Caliente near north base of Tehachapi Mountains. Comment
  RSA90222  Astragalus didymocarpus var. didymocarpus F. W. Peirson 1925-3-19 5493 Kern North slope of Tehachapi Pass. 610 Comment
  RSA92275  Layia pentachaeta F. W. Peirson 1925-3-19 5507 Kern North slope of Tehachapi Mountains 457 Comment
  PASA1980  Cryptantha flaccida Frank W. Peirson 1925-3-20 Tulare Near Richgrove Comment
  RSA75416  Oenothera deltoides subsp. cognata F. W. Peirson 1925-3-20 5532 Kern 20 miles S of Bakersfield Comment
  UCR143276  Lycium cooperi F. W. Peirson 1925-3-20 5533 Kern San Joaquin Valley, west of boulevard, 20 miles south of Bakersfield 183 Comment
  RSA0001501  Pseudobahia peirsonii F. W. Peirson 1925-3-20 5550 Tulare Between Ducor and Terrebella. Comment
  RSA70490  Erodium brachycarpum F. W. Peirson 1925-3-20 5537 Kern In fields 18 miles N of Bakersfield. Comment
  RSA80842  Orthocarpus brevistyla F. W. Peirson 1925-3-20 5545 Tulare Near Richgrove. Comment
  RSA90730  Astragalus oxyphysus F. W. Peirson 1925-3-20 5535 Kern In fields 18 miles N of Bakersfield. Comment
  CAS-BOT-BC100292  Blennosperma nanum var. nanum F. W. Peirson 1925-3-21 5581 Tulare Lewis Creek, near Lindsay 259 Comment
  JEPS33793  Hesperevax acaulis var. robustior F. W. Peirson 1925-3-21 5592 Tulare Lewis Creek near Lindsay; Lewis Creek 289 Comment
  JEPS4191  Mimulus congdonii Frank W. Peirson 1925-3-21 5589 Tulare near Lindsay; Lewis Creek 274 Comment
  PASA1322  Arenaria californica Frank W. Peirson 1925-3-21 Tulare Lewis Creek, near Lindsay 213 Comment
  RSA0039342  Thysanocarpus curvipes var. curvipes Frank W. Peirson 1925-3-21 5591 Tulare Slope on Lewis Creek near Lindsay. 289 Comment
  RSA0106586  Pentachaeta alsinoides F. W. Peirson 1925-3-21 5596 Tulare Lewis Creek, near Lindsay. 274 Comment
  RSA65655  Montia fontana F. W. Peirson 1925-3-21 5579 Santa Barbara Lewis Creek, near Lindsay, Tulare County. 213 Comment
  RSA66758  Lepidium dictyotum F. W. Peirson 1925-3-21 5576 Tulare Lewis Creek, near Lindsay. 213 Comment
  RSA93939  Blennosperma nanum var. nanum F. W. Peirson 1925-3-21 5581 Tulare Lewis Creek near Lindsay. 259 Comment
  CAS-BOT-BC323268  Layia fremontii Frank W. Peirson 1925-3-22 5606 Tulare 4 miles below Springville 243 Comment
  JEPS23346  Delphinium variegatum subsp. variegatum Frank W. Peirson 1925-3-22 5609 Tulare 4 mi below Springville 243 Comment
  JEPS36160  Microseris douglasii subsp. douglasii Frank W. Peirson 1925-3-22 5605 Tulare 4 mi below Springville 243 Comment
  JEPS679  Limnanthes montana Frank W. Peirson 1925-3-22 5629 Tulare Middle Fork Tule River 609 Comment
  LA38977  Mimulus guttatus Frank W. Peirson; 1925-3-22 5626 Tulare Middle Fork Tule River 609 Comment
  RSA804893  Mimulus palmeri F. W. Peirson 1925-3-22 5619 Tulare Middle Fork of Tule River. 534 Comment
  RSA80408  Mimulus congdonii F. W. Peirson 1925-3-22 5624 Tulare Middle Fork Tule River. 610 Comment
  RSA92415  Coreopsis bigelovii F. W. Peirson 1925-3-22 5622 Tulare Middle Fork of Tule River 610 Comment
  RSA95083B  Microseris campestris F. W. Peirson 1925-3-22 5605 Tulare About 4 miles below Springville. 244 Comment
  PASA2034  Lepidium dictyotum Frank W. Peirson 1925-3-23 Kings 6 miles west of Lemoore Comment
  UC908033  Gilia clivorum Frank W. Peirson 1925-3-23 5639 Fresno along summit of ridge above County Auto Camp (Coalinga to Parksfield); Inner Coast Ranges, Coalinga to Parksfield 975 Comment
  RSA73048  Leptosiphon androsaceus F. W. Peirson 1925-3-24 5655 Monterey Road from Coalinga to Parkfield 915 Comment
  RSA91104  Trifolium oliganthum F. W. Peirson 1925-3-24 5659 San Luis Obispo Morro Creek Divide. 457 Comment
  RSA66569  Lepidium dictyotum F. W. Peirson 1925-3-25 5726 San Luis Obispo Just west of summit of Morro Creek. 366 Comment
  RSA79999  Amsinckia spectabilis F. W. Peirson 1925-3-25 5678 San Luis Obispo Morro. Comment
  RSA91058  Trifolium depauperatum var. truncatum F. W. Peirson 1925-3-25 5667 San Luis Obispo On Morro Creek Divide. 427 Comment
  RSA92183  Layia jonesii F. W. Peirson 1925-3-25 5687 San Luis Obispo Between Morro and San Luis Obispo Comment
  RSA95354  Ceanothus oliganthus var. sorediatus F. W. Peirson 1925-3-25 5673 San Luis Obispo Morro Creek 412 Comment
  PASA909  Agoseris heterophylla subsp. californica Frank W. Peirson 1925-3-26 Santa Barbara Road from Lompoc to Buelton 152 Comment
  RSA90201  Alopecurus saccatus F. W. Peirson 1925-3-26 5706 Santa Barbara Between La Purisima Mission and Buellton. 152 Comment
  RSA94531  Artemisia californica F. W. Peirson 1925-3-26 5717 Santa Barbara At sea level, El Capitan Auto Camp on coast northwest of Santa Barbara. 0 Comment
  RSA77490  Ceanothus spinosus F. W. Peirson 1925-3-27 8719 Santa Barbara hills back of Santa Barbara 152 Comment
  RSA87442  Muhlenbergia microsperma F. W. Peirson 1925-3-27 5724 Santa Barbara Hills back of Santa Barbara Comment
  RSA93862  Encelia californica F. W. Peirson 1925-3-27 5718 Santa Barbara hills back of Santa Barbara 152 Comment
  RSA77487  Ceanothus spinosus F. W. Peirson 1925-4-10 5742 Orange In Silverado Canyon. 610 Comment
  PASA2253  Ribes indecorum Frank W. Peirson 1925-4-11 Orange Silverado Canyon, Santa Ana Mountains 914 Comment
  RSA84506  Ribes indecorum F. W. Peirson 1925-4-11 5732 Orange slope above mill, in Silverado Canyon, Santa Ana Mountains. 915 Comment
  POM77241  Eriodictyon crassifolium F. W. Peirson 1925-4-18 5754 Ventura Sespe Creek. 305 Comment
  RSA86866  Prunus ilicifolia F. W. Peirson 1925-4-18 5766 Ventura Sespe Creek. 305 Comment
  RSA66191  Meconella denticulata F. W. Peirson 1925-4-23 5806 Los Angeles San Gabriel River 366 Comment
  RSA69576  Mentzelia micrantha F. W. Peirson 1925-4-23 5797 Los Angeles Forks of San Gabriel River. 534 Comment
  RSA0117474  Collinsia concolor F. W. Peirson 1925-5-12 5818 San Diego Potrero Grade 686 Comment
  RSA90346  Lathyrus splendens F. W. Peirson 1925-5-12 5817 San Diego Potrero Grade 686 Comment
  CAS-BOT-BC115900  Carex subfusca Frank Warrington Peirson 1925-5-15 5918 San Diego Laguna Lakes Camp, Laguna Mountains. 1752 Comment
  LA38962  Mimulus palmeri Frank W. Peirson; 1925-5-15 5919 San Diego Laguna Lakes auto camp, N of camp 1676 Comment
  RSA100258  Plectritis ciliosa subsp. insignis F. W. Peirson 1925-5-15 5907 San Diego Laguna Lakes, Laguna Mountains 1829 Comment
  RSA65662B  Claytonia parviflora subsp. tenuifolia F. W. Peirson 1925-5-15 5908 San Diego Laguna Lakes Camp, Laguna Mountains. Comment
  RSA80184  Antirrhinum coulterianum F. W. Peirson 1925-5-15 5897 San Diego 10 miles northwest of Jacumba Comment
  RSA80442  Mimulus fremontii F. W. Peirson 1925-5-15 5901 San Diego 4 mi. south of Buckman Springs, eastern San Diego Co. Comment
  UC635630  Limnanthes gracilis subsp. parishii Frank W. Peirson 1925-5-15 5921 San Diego Laguna Lakes Camp Laguna Mts. Comment
  RSA0117319  Collinsia parviflora F. W. Peirson 1925-5-15 5927 San Diego Laguna Lakes, Laguna Mts 1524 Comment
  RSA90227  Astragalus douglasii var. perstrictus F. W. Peirson 1925-5-15 5896 San Diego 10 miles northwest of Jacumba Comment
  RSA93953  Hymenoclea salsola F. W. Peirson 1925-5-15 5891 San Diego Summit of Mtn Springs Grade, East of Jacumba Comment
  RSA68757  Delphinium patens subsp. hepaticoideum F. W. Peirson 1925-5-16 5934 San Diego About 1 mile north of Laguna Lakes camp, Laguna Mouintains. Comment
  RSA70853  Arctostaphylos glandulosa subsp. adamsii F. W. Peirson 1925-5-16 5936 San Diego Monument Peak, Laguna Mts. Comment
  JEPS54139  Thysanocarpus laciniatus Frank W. Peirson 1925-5-17 5942 San Diego e slope Laguna Mts., Vallecito Canyon Vallecito Canyon; e slope Laguna Mts., Vallecito Canyon Comment
  PASA2221  Eriophyllum wallacei var. rubellum Frank W. Peirson 1925-5-17 San Diego Vallecito Canyon, east slope Laguna Mts. Comment
  PASA410  Viguiera deltoidea var. parishii Frank W. Peirson 1925-5-17 San Diego Lower part of Vallecito Canyon, Laguna Mts. Comment
  RSA80225  Penstemon clevelandii subsp. connatus F. W. Peirson 1925-5-17 5957 San Diego At foot of steep part of trail from Vallecito Canyon to Laguna Mountains Comment
  JEPS19457  Lotus micranthus Frank W. Peirson 1925-5-18 5963 San Diego n shore of Cuyamaca Lake Cuyamaca Lake 1402 Comment
  JEPS65694  Trifolium albopurpureum var. albopurpureum Frank W. Peirson 1925-5-18 5974 San Diego Automobile Camp Cuyamaca Lake 1402 Comment
  RSA65685  Lewisia brachycalyx F. W. Peirson 1925-5-18 5990 San Diego Cuyamaca Lake, north of dam 1402 Comment
  RSA82102  Mimulus clevelandii F. W. Peirson 1925-5-18 5960 San Diego Lower part of grade from Guatay to Laguna Mountains. Comment
  RSA86766  Deschampsia danthonioides F. W. Peirson 1925-5-18 5993 San Diego Camp ground at Cuyamaca Lake 1402 Comment
  SD136473  Sanicula tuberosa F. W. Peirson 1925-5-18 5964 San Diego Cuyamaca Lake, Cuyamaca Mountains 1399 Comment
  RSA90990  Trifolium wormskioldii F. W. Peirson 1925-5-18 5973 San Diego North shore of Cuyamaca Lake. 1402 Comment
  RSA69670  Juncus bufonius F. W. Peirson 1925-5-19 6017 San Diego Road crossing, San Luis Rey River. 915 Comment
  RSA77755  Viola lobata F. W. Peirson 1925-5-19 5996 San Diego Middle Peak, Cuyamaca Mountains, eastern San Diego County 1677 Comment
  RSA80171  Collinsia heterophylla F. W. Peirson 1925-5-19 6002 San Diego 1 mile south of Morettis, northern San Diego Co. (south of Henshaw Lake) 930 Comment
  RSA92152  Eleocharis parishii F. W. Peirson 1925-5-19 6016 San Diego Road crossing on San Luis Rey River, northern San Diego County 915 Comment
  RSA82107  Mimulus aurantiacus var. puniceus F. W. Peirson 1925-5-20 6014 Riverside 1 mile northwest of Dripping Spring, east of Temecula. 457 Comment
  UC501462  Triteleia ixioides subsp. scabra Frank W. Peirson 1925-5-22 5602 Tulare lower part Frazier Valley Comment
  CAS-BOT-BC253320  Eriogonum fasciculatum var. foliolosum Frank W. Peirson 1925-5-27 5956 San Diego Vallecito Canyon, Laguna Mts. Comment
  SD87655  Ericameria nauseosa var. hololeuca Frank W. Peirson 1925-6-23 6026 Los Angeles Upper part of Mint Canyon. Comment
  RSA85569  Zannichellia palustris F. W. Peirson 1925-6-24 6027 Inyo Little Lake, S of Owen Valley, Inyo County. Comment
  CAS-BOT-BC291556  Crepis intermedia Frank W. Peirson 1925-6-25 6052 Mono Rock Creek 2072 Comment
  POM87063  Phlox stansburyi F. W. Peirson 1925-6-25 6065 Mono Rock Creek, volcanic tablelands. 2073 Comment
  RSA79768  Penstemon rydbergii var. oreocharis F. W. Peirson 1925-6-25 6064 Mono [Lower] Rock Creek, Sierra Nevada. 2073 Comment
  RSA85762  Potentilla glandulosa var. nevadensis F. W. Peirson 1925-6-25 6063 Mono [Lower] Rock Creek. 2073 Comment
  RSA87223  Lupinus pratensis F. W. Peirson 1925-6-25 6066 Mono Rock Creek, Sierra Nevada. 2073 Comment
  RSA88688  Carex pellita F. W. Peirson 1925-6-25 6081 Mono Rock Creek 2073 Comment
  RSA0117261  Collinsia parviflora F. W. Peirson 1925-6-25 6051 Mono [Lower] Rock Creek, Sierra Nevada. 2073 Comment
  RSA766403  Eriogonum brachyanthum F. W. Peirson 1925-6-25 6040 Mono Grade up volcanic Tableland north of Bishop. Comment
  RSA93222  Erigeron lonchophyllus F. W. Peirson 1925-6-25 6080 Inyo [Lower] Rock Creek, east base of Sierra Nevada. 2073 Comment
  RSA94481  Arnica chamissonis subsp. foliosa F. W. Peirson 1925-6-25 6045 Mono Rock Creek 1829 Comment
  RSA95222  Stephanomeria pauciflora F. W. Peirson 1925-6-25 6034 Mono Sherwin Grade, N of Bishop. 1829 Comment
  LA95397  Mimulus nanus var. mephiticus Frank W. Peirson; 1925-6-26 6095 Mono N of Mammoth, between Deadman Creek and June Lake 2377 Comment
  RSA67165  Galium trifidum var. pusillum F. W. Peirson 1925-6-26 6101 Mono Shore of Silver Lake. Sierra Nevada. 2195 Comment
  RSA82238  Castilleja applegatei subsp. pinetorum F. W. Peirson 1925-6-26 6100 Mono Silver Lake. 2195 Comment
  RSA0006827  Astragalus monoensis F. W. Peirson 1925-6-26 6093 Mono Hills north of Mammouth. 2409 Comment
  RSA72639  Wyethia mollis F. W. Peirson 1925-6-26 6089 Mono Northern part of Volcanic Tableland. Comment
  RSA85686  Potentilla fruticosa F. W. Peirson 1925-6-27 6114 Mono Gem Lake. 2774 Comment
  RSA85745  Potentilla flabellifolia F. W. Peirson 1925-6-27 6123 Mono Rush Creek. 2896 Comment
  CAS-BOT-BC391147  Stellaria longipes subsp. longipes Frank W. Peirson 1925-6-28 6133 Mono Reverse Creek 2286 Comment
  SD87879  Carex athrostachya Frank W. Peirson 1925-6-28 6134 Mono Reverse Creek, Silver Lake Region 2194 Comment
  RSA92280  Layia glandulosa subsp. glandulosa F. W. Peirson 1925-6-29 6157 Mono North slope of grade north of Mono Lake. 2134 Comment
  UC555589  Trifolium andersonii var. beatleyae Frank W. Peirson 1925-6-29 6154 Mono about 1/2 way Mono Lake to Bridgeport Comment
  UC635275  Taraxia tanacetifolia Frank W. Peirson 1925-6-29 6150 Mono summit of grade n Mono Lake Comment
  RSA79821  Keckiella breviflora subsp. glabrisepala F. W. Peirson 1925-6-30 6164 Mono West fork of Walker River below Cris Flat. Comment
  LA38993  Mimulus nanus var. mephiticus Frank W. Peirson; 1925-7-1 6174 El Dorado State Line, Lake Tahoe 1920 Comment
  POM87088  Mimulus nanus var. mephiticus F. W. Peirson 1925-7-1 6174 El Dorado State Line, Lake Tahoe. 1905 Comment
  RSA66063  Rorippa subumbellata F. W. Peirson 1925-7-1 6187 El Dorado Lake Tahoe, at State Line 1921 Comment
  RSA83953  Saxifraga oregana F. W. Peirson 1925-7-1 6168 El Dorado State Line, Lake Tahoe. 1951 Comment
  SD87767  Antennaria argentea Frank W. Peirson 1925-7-1 6181 El Dorado State Line, Lake Tahoe 1905 Comment
  POM87166  Balsamorhiza sagittata F. W. Peirson 1925-7-1 6188 El Dorado State Line, Lake Tahoe. 1921 Comment
  RSA100239  Porterella carnosula F. W. Peirson 1925-7-1 6191 El Dorado State Line, Lake Tahoe. 1951 Comment
  RSA80118  Mimulus breweri F. W. Peirson 1925-7-1 6173 El Dorado State Line, Lake Tahoe. 1921 Comment
  RSA80467  Plagiobothrys scouleri var. hispidulus F. W. Peirson 1925-7-1 8651 El Dorado State Line, Lake Tahoe. 1921 Comment
  RSA85219  Horkelia fusca subsp. parviflora F. W. Peirson 1925-7-1 6184 El Dorado State Line, Lake Tahoe. 1905 Comment
  RSA91304  Vicia americana var. americana F. W. Peirson 1925-7-1 6196 El Dorado State Line, Lake Tahoe 1905 Comment
  PASA242  Trifolium monanthum Frank W. Peirson 1925-7-2 El Dorado Fallen Leaf Lake. On Glen Alpine road, 1/4 mile from lake 2011 Comment
  POM87079  Polygonum argyrocoleon F. W. Peirson 1925-7-2 6204 El Dorado South side of Lake Tahoe. 1905 Comment
  RSA70057  Juncus bufonius var. occidentalis F. W. Peirson 1925-7-2 6207 El Dorado South side of Lake Tahoe. 1905 Comment
  RSA85916  Polygonum aviculare F. W. Peirson 1925-7-2 6204 El Dorado South side of Lake Tahoe. 1905 Comment
  RSA92121  Carex nebrascensis F. W. Peirson 1925-7-2 6214 El Dorado South side of Lake Tahoe. 1905 Comment
  RSA69259  Kalmia polifolia subsp. microphylla F. W. Peirson 1925-7-3 6250 El Dorado Susie Lake, Glen Alpine Creek Basin, Sierra Nevada. Comment
  CAS-BOT-BC344347  Madia exigua F. W. Peirson 1925-7-3 6234 El Dorado Glen Alpine Creek, Sierra Nevada 2042 Comment
  CAS-BOT-BC380401  Ranunculus alismifolius var. hartwegii F. W. Peirson 1925-7-3 6252 El Dorado Glen Alpine Creek Basin, Sierra Nevada 2499 Comment
  RSA0019669  Ribes velutinum F. W. Peirson 1925-7-3 6228 El Dorado Glen Alpine Creek Basin. Sierra Nevada. 2439 Comment
  RSA77768  Viola glabella F. W. Peirson 1925-7-3 6246 El Dorado Glen Alpine Creek Basin, Sierra Nevada. 2210 Comment
  RSA88663  Carex luzulifolia F. W. Peirson 1925-7-3 6254 El Dorado Grass Lake, Glen Alpine Creek Basin, Sierra Nevada. Comment
  RSA92665  Eriophyllum lanatum var. integrifolium F. W. Peirson 1925-7-3 6249 El Dorado Glen Alpine Creek Basin, Sierra Nevada. 2287 Comment
  JEPS38044  Chrysolepis sempervirens Frank W. Peirson 1925-7-4 6264 El Dorado Fallen Leaf Lake Comment
  RSA80099  Mimulus torreyi F. W. Peirson 1925-7-4 6263 El Dorado Road on east shore of Fallen Leaf Lake, Sierra Nevada. 1951 Comment
  POM87067  Polemonium pulcherrimum F. W. Peirson 1925-7-5 6275 El Dorado Mt. Tallac 2622 Comment
  PASA1151  Agastache urticifolia Frank W. Peirson 1925-7-6 El Dorado Glen Alpine Road near Fallen Leaf Lake 1981 Comment
  RSA69379  Thalictrum fendleri F. W. Peirson 1925-7-6 6285 El Dorado 1/4 mile above Fallen Leaf Camp Comment
  RSA84419  Caltha howellii F. W. Peirson 1925-7-7 6318 El Dorado Echo Lakes Divide, Sierra Nevada. 2530 Comment
  CAS-BOT-BC310930  Heterotheca villosa var. minor F. W. Peirson 1925-7-15 6283 El Dorado Near foot of North Trail to Tallac 1950 Comment
  LA95097  Mimulus nanus var. mephiticus Frank W. Peirson; 1925-7-26 6095 Mono N of Mammoth, between Deadman Creek and June Lake 2377 Comment
  SD87533  Baccharis glutinosa Frank W. Peirson 1925-8-4 6327 Santa Cruz Santa Cruz Mountains, Boulder region, near San Lorenzo River Comment
  RSA70087A  Piperia elongata Frank W. Peirson 1925-8-4 6336 Santa Cruz About one mile from Boulder, along San Lorenzo River. Comment
  RSA83443  Pogogyne douglasii F. W. Peirson 1925-8-8 6340 Sonoma Field 6 miles south of Santa Rosa Comment
  SD87807  Lessingia ramulosa Frank W. Peirson 1925-8-9 6351 Lake Near Upper Blue Lakes Comment
  CAS-BOT-BC64595  Armeria maritima subsp. californica Frank W. Peirson 1925-8-10 6386 Mendocino Jug Handle Creek. Comment
  POM87058  Horkelia californica F. W. Peirson 1925-8-10 6415 Mendocino 1 mile S of Albion Comment
  RSA100284  Campanula californica F. W. Peirson 1925-8-10 6372 Mendocino Jug Handle Creek, 6 miles north of Mendocino City. Comment
  RSA65602  Stellaria crispa F. W. Peirson 1925-8-10 6391 Mendocino Jug Handle Creek, 6 miles north of Mendocino City. Comment
  RSA65603  Stellaria media F. W. Peirson 1925-8-10 6390 Mendocino Jug Handle Creek, 6 miles north of Mendocino City. Comment
  RSA68748  Armeria maritima subsp. californica F. W. Peirson 1925-8-10 6386 Mendocino Jug Handle Creek, 6 miles north of Mendocino City. Comment
  RSA69648  Goodyera oblongifolia Frank W. Peirson 1925-8-10 6397 Mendocino Jug Handle Creek, 6 miles north of Mendocino City. Comment
  RSA80354  Conioselinum chinense F. W. Peirson 1925-8-10 6359 Mendocino Jug Handle Creek, 6 miles north of Mendocino City Comment
  RSA86358  Pinus muricata F. W. Peirson 1925-8-10 6408 Mendocino On coast south of Mendocino City, Northern California. Comment
  RSA0028542  Geranium molle F. W. Peirson 1925-8-10 6385 Mendocino Jug Handle Creek, 6 miles north of Mendocino City. Comment
  RSA82551  Stachys albens F. W. Peirson 1925-8-10 6379 Mendocino Jug Handle Creek, 5 miles north of Mendocino City. Comment
  RSA94423  Chrysanthemum segetum F. W. Peirson 1925-8-10 6414 Mendocino 1 mile south of Albion Comment
  RSA99371  Lonicera hispidula var. vacillans F. W. Peirson 1925-8-10 6380 Mendocino Jug Handle Creek, 6 miles north of Mendocino City. Comment
  RSA93842  Aster radulinus F. W. Peirson 1925-8-30 6422 Alameda Near summit of Berkeley Hills Comment
  RSA83463  Melissa officinalis F. W. Peirson 1925-9-20 6436 Alameda Hills back of Oakland. Comment
  SD87862  Epilobium densiflorum Frank W. Peirson 1925-9-20 6437 Alameda Hills back of Oakland, Moraga Road, Comment
  POM87099  Physalis lancifolia F. W. Peirson 1925-9-26 6447 Solano Suisun Marshes. Along railroad track. Comment
  RSA80779  Grindelia stricta var. angustifolia F. W. Peirson 1925-9-26 6439 Solano Suisun Marshes. Comment
  RSA91479  Schoenoplectus robustus F. W. Peirson 1925-9-26 6443 Solano Suisun Marshes Comment
  RSA91916  Phragmites australis F. W. Peirson 1925-9-26 6438 Solano Suisun Marshes Comment
  RSA93747  Aster subulatus var. ligulatus F. W. Peirson 1925-9-26 6444 Solano Suisun Marshes Comment
  RSA91905  Phalaris californica F. W. Peirson 1925-11-2 6472 Alameda Euclid Avenue, Cragmont, Berkeley Comment
  CAS-BOT-BC263518  Eriogonum thomasii Frank W. Peirson 1926-1-31 6490 Riverside Abundant at Dos Palmas, Colorado Desert Comment
  RSA65388  Atriplex hymenelytra F. W. Peirson 1926-2-22 6502 Riverside Thousand-Palms Canyon; Coachella Valley Comment
  RSA77887  Tiquilia palmeri F. W. Peirson 1926-2-22 5421 Riverside Thousand-Palms Canyon; Coachella Valley Comment
  RSA85867  Fragaria chiloensis Mabel Peirson 1926-2-24 6519 San Mateo Moss Beach. Comment
  RSA69046  Dodecatheon hendersonii subsp. cruciatum F. W. Peirson 1926-3-13 6526 Alameda Strawberry Canyon, Berkeley Comment
  RSA95346  Ceanothus oliganthus var. oliganthus F. W. Peirson, Ruth Conrad 1926-3-20 6513 Los Angeles Arroyo Seco. 1006 Comment
  POM175482  Sidalcea malviflora subsp. laciniata Mabel Peirson 1926-3-28 6528 Marin Marin County: Elk Valley Comment
  PASA1325  Cerastium arvense var. maximum Mabel B. Peirson 1926-3-28 Marin Tennessee Cove Comment
  RSA87099  Lupinus bicolor subsp. microphyllus F. W. Peirson 1926-3-28 6642 Tulare Kings River at main north and south boulevard. Comment
  PASA507  Brodiaea laxa Frank W. Peirson 1926-4-1 Sonoma 6 miles south of Cloverdale Comment
  POM89154  Trifolium fucatum F. W. Peirson 1926-4-1 6551 Sonoma 6 miles south of Cloverdale. Comment
  RSA100278  Plectritis congesta subsp. brachystemon Mabel Peirson, F. W. Peirson 1926-4-1 6562 Mendocino Near Russian River, Hopland. Comment
  RSA576932  Plectritis macrocera F. W. Peirson 1926-4-1 6562 Mendocino Hopland. Near Russian River. Comment
  RSA79470  Collinsia sparsiflora var. collina F. W. Peirson, Mabel B. Peirson 1926-4-1 6543 Marin 4 miles north of Ignacio. Comment
  RSA88647  Carex barbarae F. W. Peirson, Mabel Peirson 1926-4-1 6559 Mendocino Near Russian River, Hopland. Comment
  RSA97384  Scandix pecten-veneris F. W. Peirson, Mabel Peirson 1926-4-1 6540 Marin 2 miles N of San Rafael Comment
  RSA69891  Fraxinus dipetala F. W. Peirson, Mabel Peirson 1926-4-2 6602 Lake Lower Lake. Comment
  RSA77807  Cynoglossum grande F. W. Peirson, Mabel Peirson 1926-4-2 6575 Lake Grade from Clear Lake on Hopland Road. Comment
  RSA83970  Saxifraga californica F. W. Peirson 1926-4-2 6569 Lake Hopland grade. Comment
  RSA87201  Lupinus albifrons var. albifrons F. W. Peirson 1926-4-2 6601 Lake Lower Lake Comment
  SD87567  Lasthenia glabrata var. glabrata Frank W. Peirson 1926-4-2 6588 Lake West end Clear Lake. Comment
  SD87887  Erythronium californicum Frank W. Peirson 1926-4-2 6574 Lake Grade down to Clear Lake, Hopland Road, abundant on shaded banks. Comment
  PASA2566  Delphinium variegatum Frank W. Peirson 1926-4-2 6564 Mendocino Foot of Hopland Grade 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
  RSA80304  Orthocarpus purpurascens F. W. Peirson 1926-4-2 6606 Lake Lower Lake. Comment
  RSA84874  Ranunculus hebecarpus Mabel Peirson 1926-4-2 6603 Lake Hill top back from Lower Lake Comment
  RSA91549  Trifolium depauperatum F. W. Peirson, Mabel B. Peirson 1926-4-2 6589 Lake West end of Clear 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
  RSA92706  Salix exigua F. W. Peirson 1926-4-2 9602 Lake Hopland Grade to Clear Lake. Comment
  RSA95045  Cacaliopsis nardosmia F. W. Peirson, Mabel Peirson 1926-4-2 6577 Lake Grade down to Clear Lake, Hopland Road. Comment
  JEPS33079  Allium fimbriatum var. fimbriatum F. W. Peirson 1926-4-3 6618 Lake Middletown Comment
  RSA68721  Fritillaria recurva Frank W. Peirson, Mabel B. Peirson 1926-4-3 6622 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
  RSA92385  Ancistrocarphus filagineus F. W. Peirson, Mabel Peirson 1926-4-3 6613 Lake 3.3 miles north of Middletown. Comment
  UCR66560  Trientalis latifolia F. W. Peirson 1926-4-10 6635 Contra Costa Boulevard near San Pablo Reservoir Comment
  RSA97366  Sanicula bipinnata F. W. Peirson, Mabel Peirson 1926-4-10 6633 Alameda West slope of El Cerrito Comment
  RSA92273  Calycadenia tenella F. W. Peirson 1926-4-25 6643 Orange Laguna canyon Comment
  RSA66708  Caulanthus amplexicaulis var. amplexicaulis F. W. Peirson 1926-4-27 6672 Los Angeles Rock Creek, north slope of San Gabriel Range 1372 Comment
  RSA91762  Ericameria linearifolia F. W. Peirson 1926-4-27 6669 Los Angeles San Gabriel Mountains. North side of San Gabriel Mountains, Rock Creek. 1296 Comment
  RSA93762  Baileya pleniradiata F. W. Peirson 1926-4-27 6676 San Bernardino 16 miles W of victorville, Mojave Desert Comment
  RSA93814  Chaenactis fremontii F. W. Peirson 1926-4-27 6677 San Bernardino 16 miles W of victorville, Mojave Desert Comment
  RSA95067  Rafinesquia neomexicana F. W. Peirson 1926-4-27 6675 San Bernardino 20 miles west of Voctorville Comment
  SD87551  Leptosiphon breviculus Frank W. Peirson 1926-4-27 6665 Unknown Rock Creek, San Gabriel Range. 1295 Comment
Read comments
Jan 1 2016
  RSA65226  Eriogonum maculatum F. W. Peirson 1926-4-28 6690 San Bernardino Box S Spring, s. Mojave Desert. 1082 Comment
  RSA71868  Gilia cana subsp. bernardina F. W. Peirson 1926-4-28 6686 San Bernardino About 5 miles north of Box S Spring, Mojave Desert. Comment
  RSA65143  Eriogonum fasciculatum var. foliolosum F. W. Peirson 1926-4-30 6695 San Diego About 1 mile from Pala on the road to Henshaw Dam 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
  RSA0070478  Orobanche californica subsp. feudgei Frank W. Peirson 1926-5-1 6722 San Diego Bottom lands of Temecula River, Oak Grove. Comment
  RSA72235  Camissonia palmeri F. W. Peirson 1926-5-8 6727 Los Angeles 12 miles E of Palmdale, Antelope Valley Comment
  RSA71999  Phlox austromontana F. W. Peirson 1926-5-30 6745 San Bernardino On low hills, chiefly along summits on north side of Baldwin Lake. San Bernardino Mountains. 2043 Comment
  RSA91063  Trifolium longipes subsp. atrorubens F. W. Peirson 1926-5-30 6749 San Bernardino South side of Bear Lake near road to Santa Ana River, about 2 miles from Dam 2043 Comment
  RSA65687  Lewisia nevadensis F. W. Peirson 1926-5-31 6754 San Bernardino Bluff Lake 2287 Comment
  RSA85714  Potentilla wheeleri F. W. Peirson 1926-5-31 6756 San Bernardino Bluff Lake. 2287 Comment
  RSA83354  Dudleya cymosa subsp. pumila F. W. Peirson 1926-6-2 7938 Los Angeles Trail up south fork Rock Creek. 1828 Comment
  RSA69605  Sagittaria latifolia F. W. Peirson 1926-6-20 6759 Butte Banks of Sacramento River, 5 miles west of Chico. Comment
  SBBG29846  Downingia bacigalupii F. W. Peirson 1926-6-21 6802 Plumas ca. 0.5 mi back from N shore of Lake Almanor Comment
  CAS-BOT-BC228465  Plagiobothrys mollis Frank W. Peirson 1926-6-21 6803 Plumas Open strip of land between forest and lake on the N shore, Lake Almanor 1447 Comment
  PASA154  Orthocarpus lacerus Frank W. Peirson 1926-6-21 Plumas East slope Sierra Nevada on the Humbolt Rd. Comment
  POM175522  Erythranthe pulsiferae F. W. Peirson 1926-6-21 6801 Plumas Lake Almanor. Comment
  RSA71855  Collomia linearis F. W. Peirson 1926-6-21 6783 Plumas East slope of Sierra Nevada on Humboldt Road Comment
  UC501524  Brodiaea minor Frank W. Peirson 1926-6-21 6767 Butte Humboldt Road Butte Meadows Comment
  PASA1628  Dicentra formosa Frank W. Peirson 1926-6-22 Shasta Drakesbad, Lassen National Park. Trail to the Devil's Kitchen 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
  RSA77770  Viola glabella F. W. Peirson 1926-6-22 6818 Unknown Trail from Devil's Kitchen, Lassen National Park. Comment
  RSA79803  Penstemon newberryi subsp. newberryi F. W. Peirson 1926-6-22 6814 Plumas Drakesbad, Lassen National Park. 1677 Comment
  SD87658  Crepis monticola Frank W. Peirson 1926-6-22 6829 Lassen Lassen National Park Comment
  UC511756  Phacelia mutabilis Frank W. Peirson 1926-6-22 6813 Plumas trail from Drakesbad to the Devil's Kitchen; Lassen National Park 1737 Comment
  RSA65931  Polygonum davisiae F. W. Peirson 1926-6-23 6841 Shasta Trail to summit of Lassen Peak, Lassen National Park Comment
  RSA66580  Lesquerella occidentalis F. W. Peirson 1926-6-23 6837 Shasta Trail to summit of Lassen Peak, Lassen National Park. Comment
  RSA72652  Helianthella californica var. nevadensis F. W. Peirson 1926-6-23 6834 Shasta Lower portion of trail to summit of Lassen Peak. Lassen National Park. Comment
  SD87856  Erythronium purpurascens Frank W. Peirson 1926-6-23 6844 Shasta Mount Lassen, extremely abundant on banks about the meadows and wood borders. Comment
  CAS-BOT-BC197595  Eriogonum vimineum Frank Warrington Peirson 1926-6-24 6856 Modoc Near a small lake about 3 mi E of Alturus. Comment
  RSA72211  Camissonia tanacetifolia subsp. tanacetifolia F. W. Peirson 1926-6-24 6857 Modoc Small lake about 3 miles east of Alturas. Comment
  CAS-BOT-BC197983  Navarretia intertexta subsp. propinqua Frank Warrington Peirson 1926-6-25 6868 Modoc Cedarville Pass, Warner Mts. Comment
  JEPS12114  Solanum triflorum Frank W. Peirson 1926-6-25 6878 Modoc Warner Mountains, Cedarville Road, 1 mi e of summit Cedarville Road; Warner Mountains, Cedarville Road Comment
  JEPS12115  Solanum triflorum Frank W. Peirson 1926-6-25 6878 Modoc Warner Mountains, Cedarville Road, 1 1/2 mi e of summit Cedarville Road; Warner Mountains, Cedarville Road Comment
  RSA65209  Eriogonum heracleoides var. heracleoides F. W. Peirson 1926-6-25 6863 Modoc Warner Mountains; not far below summit in small side canyon; Cedarville Road, west slope Comment
  RSA71945  Collomia tinctoria F. W. Peirson 1926-6-25 6892 Modoc 1 mile east of summit of Cedarville Road, Warner Mountains Comment
  RSA77052  Hydrophyllum capitatum var. alpinum F. W. Peirson 1926-6-25 6875 Modoc small side canyon on Cedarville road 1 mile W of summit of Warner Mts. Comment
  RSA77589  Mertensia longiflora F. W. Peirson 1926-6-25 6895 Modoc 1 mile east of summit of Cedarville Road, Warner Mountains Comment
  RSA84425  Aquilegia formosa F. W. Peirson 1926-6-25 6879 Modoc small side canyon on Cedarville road 1 mile W of summit of Warner Mts. Comment
  POM175555A  Nemophila pedunculata F. W. Peirson 1926-6-25 6896 Modoc Small side canyon 1 mile east of summit of Warner Mountains on Cedarville Road. Comment
  RSA0011248  Vicia americana F. W. Peirson 1926-6-25 6890 Modoc Small side canyon 1 mile east of summit, Cedarville Road, Warner Mountains. 1829 Comment
  RSA90968  Erigeron pumilus var. intermedius F. W. Peirson 1926-6-25 6885 Modoc 1 mile east of summit, Cedarville Road, Warner Mountains Comment
  JEPS16042  Berula erecta Frank W. Peirson 1926-6-26 6903 Modoc Road from Alturas to Canby Comment
  RSA98355  Berula erecta F. W. Peirson 1926-6-26 6903 Modoc between Alturas and Canby Comment
  RSA90921  Erigeron foliosus var. confinis F. W. Peirson 1926-7-11 7024 Siskiyou High mountain ridge, summit of grade west of Etna or Etna Mills 1982 Comment
  CAS-BOT-BC301183  Eriophyllum lanatum var. arachnoideum Frank W. Peirson 1926-7-12 7029 Humboldt West slope Coast Range back of Orick Comment
  RSA79855  Keckiella corymbosa F. W. Peirson 1926-7-12 7025 Humboldt Klamath River near Weitchpec. Comment
  RSA85191  Sparganium angustifolium F. W. Peirson 1926-7-12 7042 Humboldt Humboldt County: Orick Comment
  RSA90948  Trifolium fucatum var. fucatum F. W. Peirson 1926-7-12 7032 Humboldt Orick Comment
  CAS-BOT-BC311079  Heterotheca oregona var. rudis Frank W. Peirson 1926-7-13 7051 Humboldt Mad River, vicinity of Blue Lake Comment
  RSA0022786  Monardella villosa subsp. subserrata F. W. Peirson 1926-7-13 7050 Humboldt Near Blue Lake, Mad River Comment
  RSA79453  Scrophularia californica F. W. Peirson 1926-7-13 7053 Humboldt Vicinity of Blue Lake, Mad River. Comment
  RSA80079  Mimulus dentatus F. W. Peirson 1926-7-13 7055 Humboldt On south side of Mad River, near Blue Lake. Comment
  JEPS10649  Castilleja exserta subsp. latifolia Frank W. Peirson 1926-7-14 7064 a Humboldt Table Bluff Lighthouse Table Bluff Comment
  RSA66714  Streptanthus bernardinus F. W. Peirson 1926-9-5 7075 San Bernardino Lake Arrowhead 1524 Comment
  RSA93099  Corethrogyne filaginifolia var. sessilis F. W. Peirson 1926-9-5 7072 San Bernardino Lake Arrowhead 1524 Comment
  UC672291  Symphyotrichum spathulatum Frank W. Peirson 1926-9-5 7073 San Bernardino Arrowhead Lake, on dam San Bernardino Mts., Arrowhead Lake 1524 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
  CAS-BOT-BC263508  Eriogonum thomasii Frank W. Peirson 1927-4-12 7171 Riverside Foot of canyon, Painted Canyon Comment
  JEPS1263  Pholistoma racemosum Mabel Peirson Apr 12 1927-Apr 14 1927 Santa Barbara Santa Cruz Island, Prisoner's Cove Prisoner's Cove; Santa Cruz Island, Prisoner's Cove Comment
  JEPS44778  Adenostoma fasciculatum Mabel Peirson Apr 12 1927-Apr 14 1927 Santa Barbara Santa Cruz Isl., Prisoner's Cove Comment
  PASA1119  Lotus tomentellus Frank W. Peirson 1927-4-12 Riverside Painted Canyon, Colorado Desert Comment
  RSA66281  Dendromecon rigida subsp. harfordii Mabel Peirson 1927-4-12 7129 Santa Barbara Santa Cruz Island. Lady's Harbor. 152 Comment
  RSA74951  Phacelia distans F. W. Peirson 1927-4-12 7163 Riverside Painted canyon, near Mecca. Comment
  UC672284  Xylorhiza cognata Frank W. Peirson 1927-4-12 7159 Riverside Painted Canyon Comment
  CAS-BOT-BC177744  Astragalus crotalariae Frank W. Peirson 1927-4-13 s.n. Imperial Imperial Valley Boulevard, opposite Salton Sea Comment
  UC635305  Astragalus crotalariae Frank W. Peirson 1927-4-13 Imperial Imperial Valley Boulevard opposite Salton Sea; opposite Salton Sea Comment
  RSA69471  Mirabilis laevis var. retrorsa F. W. Peirson 1927-4-14 7180 Imperial Canyon near east end of Santa Rosa Mountains, 8 miles from Imperial Valley Boulevard. 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
  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
  RSA97354  Sanicula arguta Mabel Peirson 1927-4-14 7147 Santa Barbara Santa Cruz Island. Prisoners Cove. Comment
  RSA75421  Oenothera deltoides subsp. deltoides F. W. Peirson 1927-4-15 7192 Imperial 10 miles east of Holtsville Comment
  SD87849  Palafoxia arida var. gigantea Frank W. Peirson 1927-4-15 7198 Imperial Sand Dunes west of Yuma Comment
  RSA92486  Helianthus niveus subsp. tephrodes F. W. Peirson 1927-4-15 7197 Imperial Sand dunes west of Yuma. Comment
  POM128762  Atriplex elegans var. fasciculata F. W. Peirson 1927-4-16 7202 Imperial A couple of miles below foot of Mountain Springs grade Comment
  RSA71803  Gilia stellata F. W. Peirson 1927-4-16 7217 Imperial Foot of Mountain Springs Grade, Western Imperial County Comment
  SD87742  Chaenactis stevioides Frank W. Peirson 1927-4-16 7208 Imperial 2.0 miles below foot of Mountain Springs Grade. Comment
  RSA82103  Mimulus aurantiacus var. aridus F. W. Peirson 1927-4-17 7223 San Diego Just north of Boulevard, at head of Mountain Springs Grade. 1067 Comment
  RSA93955  Hymenoclea salsola F. W. Peirson 1927-4-17 7232 San Diego Summit of Mountain Springs Grade. 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
  CAS-BOT-BC376037  Stylocline gnaphaloides Frank W. Peirson 1927-4-19 7244 San Diego On headland south of Torrey Pines Comment
  PASA149  Orthocarpus densiflorus var. gracilis Frank W. Peirson 1927-4-19 San Diego Headland south of Torrey Pines Comment
  POM128739  Trifolium depauperatum var. amplectens F. W. Peirson 1927-4-19 7252 San Diego Headland South of Torrey Pines Comment
  RSA90154  Astragalus didymocarpus F. W. Peirson 1927-4-19 7238 San Diego Headland south of Torrey Pines, Comment
  RSA91907  Phalaris caroliniana F. W. Peirson 1927-4-19 7246 San Diego Headland South of Torrey Pines Comment
  PASA354  Thelypodium cooperi Frank W. Peirson 1927-5-7 San Bernardino East of Kramer, Mohave Desert Comment
  RSA64778  Goodmania luteola F. W. Peirson 1927-5-7 7266 Kern 12 miles south of Muroc Comment
  RSA66808  Streptanthella longirostris F. W. Peirson 1927-5-7 7272 Kern Muroc (10 miles south) Comment
  SD87524  Langloisia setosissima subsp. punctata Frank W. Peirson 1927-5-7 7287 San Bernardino 4.0 miles west of Barstow. Comment
  RSA94976  Prenanthella exigua F. W. Peirson 1927-5-7 7276 San Bernardino 1 mile east of Kramer. Comment
  CAS-BOT-BC376675  Syntrichopappus fremontii F. W. Peirson 1927-5-8 7290 San Bernardino 10 miles north of Barstow Comment
  RSA94669  Senecio douglasii var. monoensis F. W. Peirson 1927-5-8 7294 San Bernardino Half way between Victorville and Barstow. Comment
  JEPS51896  Chamaesyce vallis-mortae Frank W. Peirson 1927-5-29 7334 Kern Red Rock Canyon Comment
  RSA0084024  Potentilla F. W. Peirson 1927-7-19 s.n. Mono Saddleback Creek. 3018 Comment
  SEINET209197  Halimolobos diffusa var. jaegeri Frank W. Peirson 1927-7-24 7539 Inyo Westguard Pass East slope in crevices of rock wall. Comment
  CAS-BOT-BC315924  Hulsea vestita subsp. vestita Frank W. Peirson 1927-7-26 7563 Mono Gull Lake 2316 Comment
  RSA0121630  Mentzelia monoensis F. W. Peirson 1927-7-26 7558 Mono Volcanic mountains between Deadman Creek and June Lake. 2409 Comment
  RSA74841  Phacelia hastata subsp. compacta F. W. Peirson 1927-7-26 7561 Mono Volcanic Mountains, between Deadman Creek and June Lake. 2409 Comment
  RSA95014  Agoseris monticola F. W. Peirson 1927-7-26 7556 Mono Volcanic Mountains between Deadman Creek and June Lake. 2439 Comment
  RSA65179  Eriogonum elatum var. elatum F. W. Peirson 1927-7-27 7571 Mono North end of Silver Lake. 2256 Comment
  RSA70070  Platanthera hyperborea Frank W. Peirson 1927-7-27 7574 Mono Slope W of camp at N end of Silver Lake. 2256 Comment
  CAS-BOT-BC365783  Solidago spectabilis F. W. Peirson 1927-7-28 7583 Mono Field near Mono Lake, at Mono Inn 1958 Comment
  RSA69616  Triglochin maritima F. W. Peirson 1927-7-28 7585 Mono Near Mono Lake at Mono Inn 1966 Comment
  RSA85222  Horkelia fusca subsp. parviflora F. W. Peirson 1927-7-29 7593 Mono Slate Creek, east slope of Sierra Nevada. 3018 Comment
  RSA87320  Galium bifolium F. W. Peirson 1927-7-29 7601 Mono Slate Creek, Sierra Nevada. 3018 Comment
  RSA0074839  Sedum obtusatum F. W. Peirson 1927-7-29 7586 Mono Slate (Saddleback) Creek, Sierra Nevada. 3018 Comment
  RSA67163  Galium trifidum var. pusillum F. W. Peirson 1927-7-29 7600 Mono Saddlebag Creek. Sierra Nevada. 3201 Comment
  RSA80088  Mimulus tilingii F. W. Peirson 1927-7-29 7596 Mono Saddleback Creek. 3018 Comment
  RSA69404  Delphinium nuttallianum F. W. Peirson 1927-7-31 7602 Tuolumne Trail from Tuolumne Meadows to Conness Peak. 2744 Comment
  RSA99366  Lonicera cauriana F. W. Peirson 1927-8-1 7617 Tuolumne Soda Spring; Tuolumne Meadows; Sierra Nevada. 2591 Comment
  CAS-BOT-BC90062  Arnica nevadensis F. W. Peirson 1927-8-3 7622 Tuolumne west slope of Mt. Dana 3200 Comment
  RSA65237  Eriogonum ovalifolium var. nivale F. W. Peirson 1927-8-3 7628 Tuolumne West slope of Mt. Dana, Sierra Nevada. 3506 Comment
  RSA83982  Saxifraga aprica F. W. Peirson 1927-8-3 7626 Tuolumne W slope of Mt Dana. Sierra Nevada. 3354 Comment
  RSA88713  Carex helleri F. W. Peirson 1927-8-3 7631 Tuolumne west slope of Mt. Dana, Sierra Nevada. 3659 Comment
  RSA94894  Arnica mollis F. W. Peirson 1927-8-3 7620 Tuolumne West slope of Mt. Dana, Sierra Nevada. 3110 Comment
  RSA92663  Eriophyllum lanatum var. integrifolium F. W. Peirson 1927-8-5 7642 Mariposa North of Lake Tenaya, Sierra Nevada 2485 Comment
  RSA93042  Erigeron peregrinus subsp. callianthemus F. W. Peirson 1927-8-5 7644 Mariposa Murphy Creek, Lake Tenaya, Sierra Nevada 2485 Comment
  RSA68702  Lilium parvum Frank W. Peirson 1927-8-6 7666 Mariposa Porcupine Flat, Sierra Nevada 2439 Comment
  RSA82249  Castilleja miniata F. W. Peirson 1927-8-6 7650 Mariposa Near May Lake. 2820 Comment
  RSA0124941  Senecio integerrimus var. exaltatus F. W. Peirson 1927-8-6 7658 Mariposa Porcupine Flat, Sierra Nevada. 2438 Comment
  RSA92856  Chaenactis alpigena F. W. Peirson 1927-8-6 7663 Mariposa Porcupine Flat, Sierra Nevada 2439 Comment
  CAS-BOT-BC375603  Stephanomeria lactucina Frank W. Peirson 1927-8-7 7668 Mariposa Trail from Porcupine Flat to Yosemite Point 2316 Comment
  JEPS11336  Kickxia elatine Frank W. Peirson 1927-9-25 7676 Orange flats below Wintersberg Comment
  SEINET6692574 Image available Eriogonum deserticola Frank W. Peirson 1927-11-26 7679 Imperial Open desert along boulevard about 1/2 way down the Salton Sea. Comment
  RSA64587  Eriogonum pusillum F. W. Peirson 1928-3-10 7702 Riverside Just east of Whitewater Bridge, near Whitewater, at head of Coachella Valley. Comment
  RSA80251  Mohavea confertiflora F. W. Peirson 1928-3-10 7708 Riverside Hidden Spring, northern Colorado Desert. Comment
  RSA65528  Mammillaria dioica F. W. Peirson 1928-3-24 7754 San Diego San Felipe Canyon above Sentac Canyon. Comment
  RSA77087  Thamnosma montana F. W. Peirson 1928-3-24 7738 San Diego San Felipe Creek, near foot of Sentenac Canyon, eastern San Diego Co. Comment
  RSA80146  Mimulus bigelovii var. bigelovii F. W. Peirson 1928-3-24 7735 San Diego San Felipe Creek, Sentenac Canyon, eastern San Diego Co. Comment
  RSA92527  Bahiopsis parishii F. W. Peirson 1928-3-24 7737 San Diego San Felipe Creek near mouth of Sentenac Canyon, eastern San Diego. Comment
  PASA2710  Astragalus agninus Frank W. Peirson 1928-4-1 7759 San Bernardino Silver Lake, about 8 miles north of Baker Comment
  POM90171  Astragalus lentiginosus var. borreganus F. W. Peirson 1928-4-1 7759 San Bernardino Silver Lake, about 8 miles north of Baker, e. Mojave Desert. Comment
  RSA77068  Langloisia setosissima subsp. punctata F. W. Peirson 1928-4-1 7761 San Bernardino Bordering the Amargosa Wash, 28 miles north of Baker Comment
  CAS-BOT-BC252979  Eriogonum reniforme Frank W. Peirson 1928-4-2 7788 Inyo Near Bradbury Well, Death Valley Region Comment
  JEPS1697  Eucrypta micrantha Frank W. Peirson 1928-4-2 7785 Inyo near Bradbury Well; Death Valley Region Comment
  JEPS31434  Monoptilon bellioides Frank W. Peirson 1928-4-2 7780 Inyo near Bradbury Well; Death Valley Region Comment
  PASA1995  Cryptantha pterocarya var. cycloptera Frank W. Peirson 1928-4-2 Inyo Near Bradbury Well, Death Valley Region Comment
  PASA2300  Stylocline micropoides Frank W. Peirson 1928-4-2 Inyo Near Bradbury Well, Death Valley Region Comment
  POM171192  Sphaeralcea ambigua var. keckii F. W. Peirson 1928-4-2 7795 Inyo 2 miles E of Bradbury Well, Death Valley Region Comment
  RSA66171  Draba cuneifolia var. integrifolia F. W. Peirson 1928-4-2 7791 Inyo About 1 mile east of Bradbury Well; Death Valley Region. Comment
  RSA75691  Camissonia kernensis subsp. gilmanii F. W. Peirson 1928-4-2 7799 Inyo About 1 mile east of Bradbury Well, Death Valley Region. Comment
  CAS-BOT-BC401939  Gilia ochroleuca subsp. ochroleuca F. W. Peirson 1928-4-2 7805 Inyo 18 miles south of Ryan, Death Valley Region Comment
  CAS-BOT-BC401940  Gilia ochroleuca subsp. ochroleuca Frank W. Peirson 1928-4-2 7805 Inyo 18 miles south of Ryan, Death Valley Region Comment
  RSA94109  Peucephyllum schottii F. W. Peirson 1928-4-2 7813 Inyo Low benches along stream bed, Furnace Creek, below Ryan, Death Valley 396 Comment
  UC908516  Gilia scopulorum Frank W. Peirson 1928-4-2 7812 Inyo Furnace Cr near Ryan (foot of canyon wall and in talus); Furnace Cr near Ryan 609 Comment
  JEPS21060  Viguiera reticulata Frank W. Peirson 1928-4-3 7820 Inyo Emigrant Pass Death Valley Region 914 Comment
  RSA92523  Bahiopsis reticulata F. W. Peirson 1928-4-3 7820 Inyo Emigrant Pass, Death Valley Region 914 Comment
  RSA90763  Astragalus purshii var. tinctus F. W. Peirson, Margaret Stason, F. Brubaker 1928-4-4 7837 Inyo Wild Rose Canyon, Panamint Mts. 1524 Comment
  RSA92918  Lasthenia gracilis F. W. Peirson 1928-4-4 7830 Kern Road Randsburg to Mojave and 15 miles from the former Comment
  RSA65621  Opuntia echinocarpa var. wolfii F. W. Peirson 1928-4-20 7853 San Diego South slope of canyon of San Felipe Creek, near foot of Sentenac Canyon. Comment
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Mar 19 2020
  RSA70532  Chamaesyce melanadenia F. W. Peirson 1928-4-20 7860 San Diego San Felipe creek near foot of Sentenac Canyon , eastern San Diego Co. Comment
  RSA86986  Senna covesii F. W. Peirson 1928-4-21 7870 San Diego Canyon of San Felipe Creek, near foot of Sentenac canyon Comment
  CAS-BOT-BC203391  Horsfordia newberryi Frank W. Peirson 1928-4-22 7874 San Diego San Felipe Creek, 4 miles below Sentenac Canyon Comment
  RSA72240  Camissonia claviformis subsp. peirsonii F. W. Peirson 1928-4-22 7880 Imperial Foot of rocky walls of the Narrows, San Felipe Creek. Comment
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Aug 22 2014
  RSA74796  Phacelia pedicellata F. W. Peirson 1928-4-22 7876 San Diego The Narrows, San Felipe Creek, eastern San Diego County. Comment
  RSA75386  Camissonia cardiophylla F. W. Peirson 1928-4-22 7882 San Diego steep rocky canyon immediately west of the Narrows, San Felipe Creek. Comment
  RSA93443  Brickellia frutescens F. W. Peirson 1928-4-22 7885 San Diego steep rocky canyon immediately west of the Narrows, San Felipe Creek. Comment
  PASA949  Senecio monoensis Frank W. Peirson 1928-4-23 Riverside 2 1/2 miles below Cottonwood Spring Comment
  RSA69915  Asclepias subulata F. W. Peirson 1928-4-23 7886 Riverside in sandy wash land; 6 mi. n.e. of Mecca, on road to Blythe Comment
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Oct 23 2011
  CAS-BOT-BC106344  Brickellia atractyloides var. arguta Frank W. Peirson 1928-4-24 7900 Riverside Cottonwood Spring Comment
  PASA307  Nemacladus rigidus Frank W. Peirson 1928-4-24 Riverside Cottonwood Spring, 1/2 mile below spring in broad sandy wash Comment
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Jun 24 2016
  RSA64583  Eriogonum pusillum F. W. Peirson 1928-4-24 7912 Riverside Below Cottonwood Spring, northern edge of Colorado Desert. Comment
  RSA65145  Eriogonum fasciculatum F. W. Peirson 1928-4-24 7907 Riverside Cottonwood Spring, west end of Eagle Mtns. Comment
  RSA67363  Lepidium fremontii F. W. Peirson 1928-4-24 7902 Riverside Cottonwood Springs, northern Colorado Desert Comment
  RSA69561  Mentzelia jonesii F. W. Peirson 1928-4-24 7909 Riverside Below Cottonwood Springs, Eagle Mountains. Northern Colorado Desert. Comment
  RSA93902  Encelia actoni F. W. Peirson 1928-4-24 7891 Riverside Cottonwood Springs, northern Colorado Desert Comment
  RSA95318  Sphaeralcea ambigua subsp. ambigua F. W. Peirson 1928-4-24 7892 Riverside Cottonwood Springs, northern Colorado Desert Comment
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Oct 9 2010
  RSA93294  Ericameria cooperi F. W. Peirson 1928-4-25 7920 San Bernardino White Tank region 11 miles S of 29 Palms. Comment
  RSA74919  Phacelia egena F. W. Peirson 1928-6-2 7946 Los Angeles along lower part of trail up S Fork of Rock Creek, San Gabriel Mts 1524 Comment
  RSA0006074  Orobanche valida subsp. valida F. W. Peirson 1928-6-2 7937 Los Angeles S fork of Rock Creek: trail toward the summit. 1982 Comment
  RSA75532  Phacelia fremontii F. W. Peirson 1928-6-2 7947 Los Angeles Open clearing, south fork of Rock Creek, San Gabriel Range 1463 Comment
  RSA69912  Asclepias vestita F. W. Peirson 1928-6-3 7950 Los Angeles roadside, N slope of Pinyon Ridge, betw Rock Creek and Big Pines, San Gabriel Mts. 1372 Comment
  RSA66042  Eriogonum baileyi var. baileyi F. W. Peirson 1928-7-1 8417 Los Angeles San Gabriel Mountains: Aliso Canyon 1098 Comment
  RSA94422  Chrysanthemum leucanthemum F. W. Peirson 1928-7-5 7960 Del Norte Open field 15-20 miles north of Crescent City Comment
  RSA66058  Rorippa curvipes var. truncata F. W. Peirson 1928-8-7 8178 Mono Cris Flat, west fork of Walker River. Comment
  PASA347  Stephanomeria runcinata Frank W. Peirson 1928-9-4 Los Angeles Roock Creek about 1 mile below canyon Comment
  RSA66045  Eriogonum baileyi var. baileyi F. W. Peirson 1928-9-4 8188 Los Angeles Rock Creek about 1 mile below Pallett Creek Comment
  RSA70312  Juncus xiphioides F. W. Peirson 1928-9-4 8187 Los Angeles wet bank of irrigation ditch; Rock Creek about 1 mile above Pallett Creek Comment
  RSA68967  Plantago major F. W. Peirson 1928-9-5 8198 San Bernardino Near Old Woman Springs, s. Mojave Desert . 970 Comment
  RSA93843  Aster bernardinus F. W. Peirson 1928-9-5 8195 San Bernardino Victorville Comment
  RSA90686  Gutierrezia microcephala F. W. Peirson 1928-9-6 8203 San Bernardino 1 mile S of Warrens Well, Southern Mojave Desert Comment
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Mar 24 2011
  RSA70007  Tidestromia oblongifolia F. W. Peirson 1928-11-30 8211 Riverside Foot canyon below Shavers Well, NE of Mecca. Comment
  RSA72330  Epilobium canum subsp. latifolium F. W. Peirson 1928-11-30 8212 Riverside Cottonwood Spring, northern Colorado Desert. Comment
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Oct 9 2010
  RSA93251  Ericameria cuneata var. spathulata F. W. Peirson 1928-11-30 8214 Riverside about 1 mile north of Cottonwood Spring, northeast of Mecca. Comment
  CAS-BOT-BC123661  Malvastrum gabrielense Frank Warrington Peirson 1929-1-1 774 Los Angeles San Gabriel Mts. Aliso Creek. Arraster. 1097 Comment
  RSA84515  Ribes indecorum F. W. Peirson 1929-3-30 8278 San Diego south slope near summit of grade, north of Pala Comment
  RSA75868  Nemophila menziesii var. menziesii F. W. Peirson 1929-3-31 8286 San Diego Foot of flat below Banner, Foster Grade east of Julian. Comment
  RSA77344  Ceanothus tomentosus var. olivaceus F. W. Peirson 1929-3-31 8283 San Diego Banner Canyon east of Julian. 1067 Comment
  CAS-BOT-BC322521  Malacothrix incana Frank W. Peirson 1929-4-20 8311 Santa Barbara Surf, sea level Comment
  JEPS36628  Malacothrix incana Frank W. Peirson 1929-4-20 8311 Santa Barbara Surf Comment
  RSA428785  Solanum umbelliferum F. W. Peirson 1929-4-20 8321 Santa Barbara Surf. Comment
  RSA65188  Chorizanthe angustifolia F. W. Peirson 1929-4-20 8310 Santa Barbara Surf Comment
  RSA72260  Camissonia cheiranthifolia subsp. cheiranthifolia F. W. Peirson 1929-4-20 8308 Santa Barbara Surf. Comment
  RSA82984  Stachys bullata F. W. Peirson 1929-4-20 8291 Santa Barbara El Capitan Auto Camp, on coast west of Santa Barbara. Comment
  PASA813  Lupinus concinnus var. optatus Frank W. Peirson 1929-5-4 San Diego Palomar Mt. east trail 1066 Comment
  RSA71816  Saltugilia australis F. W. Peirson 1929-5-4 8343 San Diego About 5 miles N of Oak Grove. 762 Comment
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May 10 2017
  RSA73090  Linanthus dianthiflorus subsp. dianthiflorus F. W. Peirson 1929-5-4 8341 San Diego About 5 miles N of Oak Grove. 762 Comment
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May 10 2017
  RSA75131  Nemacladus pinnatifidus F. W. Peirson 1929-5-4 8358 San Diego On trail from Oak Grove to Palomar Mtn. 1067 Comment
  RSA75509  Phacelia brachyloba F. W. Peirson 1929-5-4 8349 San Diego trail from Oak Grove to Palomar Mt. Comment
  RSA81465  Castilleja applegatei subsp. martinii F. W. Peirson 1929-5-4 8357 San Diego Trail from Oak Grove to Palomar Mountain. 1296 Comment
  RSA87458  Melica imperfecta F. W. Peirson 1929-5-4 8351 San Diego Trail from Oak Grove to Palomar Mountain. 1296 Comment
  RSA73052  Leptosiphon androsaceus F. W. Peirson 1929-5-5 73052 San Diego South slope of divide between Oak Grove and Warner's Hot Springs. 915 Comment
  RSA91592  Carex mesochorea F. W. Peirson 1929-5-10 8365 Los Angeles Altadena. Comment
  PASA2287  Gnaphalium ramosissimum Frank W. Peirson 1929-5-17 Santa Barbara Surf Comment
  RSA447394  Stachys bullata F. W. Peirson 1929-5-17 8366 Santa Barbara Lompoc road 1 mile east of Surf. Comment
  RSA86668  Ammophila arenaria F. W. Peirson 1929-5-17 8377 Santa Barbara Grade beyond Bear Creek, 2 miles south of Surf. Comment
  RSA91714  Pseudognaphalium californicum F. W. Peirson 1929-5-17 8375 Santa Barbara On sand dunes at Surf. Comment
  RSA80166  Collinsia heterophylla F. W. Peirson 1929-5-18 8384 Santa Barbara Miguelito Park, 4 miles south of Lompoc. 122 Comment
  UCR17956  Eriogonum gracillimum F. W. Peirson 1929-5-18 s.n. San Luis Obispo Upper Cuyama Valley 427 Comment
  UC501458  Clarkia cylindrica subsp. cylindrica Frank W. Peirson 1929-5-18 8391 Santa Barbara 12 mi e Lompoc 152 Comment
  RSA90865  Carex alma F. W. Peirson 1929-5-31 8407 Los Angeles Los Angeles-San Bernardino counties. San Antonio Canyon, San Gabriel Mountains. between Los Angeles and San Bernardino Counties. 2134 Comment
  RSA79753  Keckiella ternata subsp. septentrionalis F. W. Peirson 1929-6-30 8425 Los Angeles Just below the old mill on the Tie Canyon stream, Aliso Creek, San Gabriel Mountians. 1341 Comment
  RSA68782  Delphinium parishii subsp. parishii F. W. Peirson 1929-7-1 8441 Los Angeles Mt. Pacifico: upper part of trail, San Gabriel Mountains. 1982 Comment
  RSA100117  Lonicera interrupta F. W. Peirson 1929-7-11 8474 San Bernardino City Creek road below the bridge; southern slope of San Bernardino Mountains. 610 Comment
  RSA79868  Penstemon rostriflorus F. W. Peirson 1929-7-11 8456 San Bernardino Fawnskin, Bear Valley. 2073 Comment
  RSA81442  Castilleja montigena F. W. Peirson 1929-7-11 8452 San Bernardino Fawnskin, Bear Valley. 2073 Comment
  RSA90065  Lotus argyraeus var. argyraeus F. W. Peirson 1929-7-11 8451 San Bernardino Along summit of ridge back of Fawnskin, Bear Valley 2073 Comment
  GH404013  Cryptantha humilis F. W. Peirson 1929-7-20 8508 Unknown Green Lake Valley, Bishop Creek Region 3291 Comment
  RSA65114  Eriogonum lobbii F. W. Peirson 1929-7-20 8500 Inyo Trail from South Lake to Green Lake, Bishop Creek 3293 Comment
  RSA65240  Eriogonum ovalifolium var. nivale F. W. Peirson 1929-7-20 8506 Inyo Green Lake Valley, Bishop Creek region, Sierra Nevada 3293 Comment
  UC638462  Ivesia shockleyi var. shockleyi Frank W. Peirson 1929-7-20 8502 Inyo Green Lake Valley; Bishop Creek Region 3291 Comment
  RSA93047  Erigeron peregrinus subsp. callianthemus F. W. Peirson 1929-7-20 8492 Inyo Trail from South Lake to Green Lake, Sierra Nevada 3171 Comment
  POM160268  Juncus drummondii F. W. Peirson 1929-7-21 8524 Inyo Canyon south of South Lake, Bishop Creek. 3201 Comment
  RSA88712  Carex helleri F. W. Peirson 1929-7-21 8525 Inyo Below unnamed lake, canyon south of South Lake, Bishop Creek. 3201 Comment
  RSA77821  Hackelia micrantha F. W. Peirson 1929-7-21 8520 Inyo Canyon south of South Lake, Bishop Creek, Sierra Nevada. 3125 Comment
  RSA87225  Lupinus pratensis F. W. Peirson 1929-7-21 8519 Inyo Canyon south of south Lake, Bishop Creek 3125 Comment
  CAS-BOT-BC16318  Boechera howellii Frank W. Peirson 1929-7-22 8538 Inyo Bishop Pass. 3505 Comment
  RSA79988  Castilleja nana F. W. Peirson 1929-7-22 8531 Inyo Trail southward from Long Lake, Bishop Creek Region. 3415 Comment
  RSA67130  Galium hypotrichium subsp. hypotrichium F. W. Peirson 1929-7-24 8546 Inyo along the summit area, Inconsolable Range. 3582 Comment
  RSA86621  Purshia tridentata var. tridentata F. W. Peirson 1929-7-24 8554 Inyo Slope below Green Lake, Bishop Creek region. 3354 Comment
  SD87769  Draba sierrae Frank W. Peirson 1929-7-24 8549 Inyo Inconsolable Range 3660 Comment
  RSA93865  Dugaldia hoopesii F. W. Peirson 1929-7-24 8555 Inyo Slope below Green Lake, Bishop Creek region. 3354 Comment
  RSA85030  Pellaea breweri F. W. Peirson 1929-7-25 8560 Inyo South Lake, Bishop Creek Region, east slope of Sierra Nevada 3018 Comment
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Aug 19 2011
  UC501629  Gutierrezia sarothrae Frank W. Peirson 1929-8-23 8583 San Bernardino sw shore Baldwin Lake; San Bernardino Mts., Baldwin Lake 2072 Comment
  CAS-BOT-BC515050  Eriastrum sapphirinum subsp. sapphirinum F. W. Peirson 1929-8-23 8585 San Bernardino SW slopes of Baldwin Lake, near lot, Bear Valley 2072 Comment
  SD87733  Erigeron divergens Frank W. Peirson 1929-9-11 8590 San Bernardino Near Peter Pan Woodland Club, Bear Valley. 2070 Comment
  CAS-BOT-BC299871  Dieteria canescens var. canescens Frank W. Peirson 1929-9-16 8593 San Bernardino Near Baldwin Lake, San Bernardino Mts. 2103 Comment
  RSA92662  Eriophyllum confertiflorum F. W. Peirson 1929-11-10 8608 San Bernardino Road fill, Johnson Grade, East end of San Bernardino Mts 1951 Comment
  CAS-BOT-BC174419  Eremogone macradenia var. macradenia Frank W. Peirson 1930-4-14 8698 San Bernardino Cave Spring, [Mohave] Mojave Desert Comment
  RSA92412  Coreopsis bigelovii F. W. Peirson 1930-4-14 8707 San Bernardino About 3 miles north of Cave Spring. Comment
  RSA93905  Encelia actoni F. W. Peirson 1930-4-14 8700 Kern Cave Spring. Comment
  CAS-BOT-BC418716  Eschscholzia glyptosperma Frank W. Peirson 1930-4-15 8711 Inyo 6 miles south of Death Valley Junction 609 Comment
  RSA66686  Oxystylis lutea F. W. Peirson 1930-4-15 8716 Inyo Death Valley Junction. Along the Amargosa River, 7 miles S of Death Valley Junction. 579 Comment
  RSA93863  Encelia frutescens F. W. Peirson 1930-4-15 8722 Inyo Near Amargosa River 9 miles south of Shoshone. Comment
  RSA66745  Eschscholzia minutiflora F. W. Peirson 1930-4-16 8739 San Bernardino 6 miles south of summit on Cima road, eastern San Bernardino County. Comment
  RSA75526  Phacelia fremontii F. W. Peirson 1930-4-16 8729 San Bernardino Cima road, 8 miles S of the Las Vegas to Baker road Comment
  RSA86648  Purshia tridentata var. glandulosa F. W. Peirson 1930-4-16 8742 San Bernardino 7 miles south of summity of grade on Cima Road. Comment
  CAS-BOT-BC321557  Layia glandulosa Frank W. Peirson 1930-4-16 8728 San Bernardino Cima Road, 8 miles S of the Las Vegas Road Comment
  RSA93763  Baileya pleniradiata F. W. Peirson 1930-4-16 8731 San Bernardino Cima road, 8 miles S of the Las Vegas to Baker road Comment
  RSA86298  Potentilla wheeleri F. W. Peirson 1930-4-27 8751 San Bernardino Southwest end of Baldwin Lake. 2043 Comment
  RSA66118  Cusickiella douglasii F. W. Peirson 1930-4-28 8755 San Bernardino Sugarloaf Road south of Baldwin Lake 2133 Comment
  RSA90758  Astragalus purshii var. lectulus F. W. Peirson 1930-4-28 8753 San Bernardino Sugarloaf Road south of Baldwin Lake 2133 Comment
  CAS-BOT-BC100357  Brickellia atractyloides Frank W. Peirson 1930-4-29 8765 San Bernardino 2 miles east of Box S Ranch, [Mohave] Mojave Desert 914 Comment
  CAS-BOT-BC295703  Erigeron parishii Frank W. Peirson 1930-4-29 8761 San Bernardino Cushenbury Grade, San Bernardino Mts. 1371 Comment
  CAS-BOT-BC89475  Lepidium fremontii Frank W. Peirson 1930-4-29 8760 San Bernardino San Bernardino Mountains. Cushenbury Grade. 1219 Comment
  RSA571787  Ephedra nevadensis F. W. Peirson 1930-4-29 8766 San Bernardino 1 mile west of the Mohave River on the Hesperia Road. 854 Comment
  RSA67362  Lepidium fremontii F. W. Peirson 1930-4-29 8760 San Bernardino A short distance below Cusshenberry Springs, N base of San Bernardino Mt. 1220 Comment
  RSA0091448  Amsinckia tessellata var. tessellata Frank W. Peirson 1930-5-12 8792 Los Angeles Along boulevard nearly opposite Acton, about 3 miles north of Mint Canyon summit. Comment
  RSA71821  Gilia capitata subsp. abrotanifolia F. W. Peirson 1930-5-13 8837 Kern River embankment, Kern River. 845 Comment
  RSA71870  Gilia cana subsp. speciosa F. W. Peirson 1930-5-13 8819 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
  RSA79752  Penstemon grinnellii subsp. scrophularioides F. W. Peirson 1930-5-13 8833 Kern In great abundance along south bank of Cannell Creek, about 1/4 mi. back from Kern River. 845 Comment
  RSA93830  Chaenactis carphoclinia var. carphoclinia F. W. Peirson 1930-5-13 8808 Kern Red Rock Canyon 884 Comment
  RSA93952  Hymenoclea salsola F. W. Peirson 1930-5-13 8816 Kern 5 miles north of Ricardo, Indian Wells Valley 1006 Comment
  RSA94961  Malacothrix clevelandii F. W. Peirson 1930-5-13 8835 Kern Kern River 845 Comment
  RSA95366  Sphaeralcea ambigua subsp. ambigua F. W. Peirson 1930-5-13 8815 Kern 5 miles north of Ricardo, Indian Wells Valley 1006 Comment
  RSA175557  Nemophila maculata F. W. Peirson 1930-5-14 8866 Kern Greenhorn Range on road from Kernville to Glenville 1677 Comment
  RSA66274  Eschscholzia caespitosa F. W. Peirson 1930-5-14 8863 Kern On road from Kernville to Glenville, Greenhorn Range 1601 Comment
  RSA73007  Linanthus parryae F. W. Peirson 1930-5-14 8851 Kern Road from Kernville to Glenville, east slope of Greenhorn range. 1524 Comment
  RSA73016  Leptosiphon nudatus F. W. Peirson 1930-5-14 8852 Kern Road from Kernville to Glenville, east slope of Greenhorn range. 1524 Comment
  RSA76013  Nemophila pulchella F. W. Peirson 1930-5-14 8867 Kern Road from Kernville to Glenville, east slope of Greenhorn range. 1524 Comment
  RSA85294  Ranunculus occidentalis var. eisenii F. W. Peirson 1930-5-14 8868 Kern On road from Kernville to Glenville, on east side of Greenhorn Range. 1463 Comment
  CAS-BOT-BC225673  Leptosiphon serrulatus F. W. Peirson 1930-5-15 8888 Kern Hills near Glennville, Greenhorn Range 1036 Comment
  SD87526  Leptosiphon montanus Frank W. Peirson 1930-5-15 8896 Kern Greenhorn Range. 1067 Comment
  CAS-BOT-BC438076  Lithophragma parviflorum Frank W. Peirson 1930-5-15 8889 Kern hills nw of Glenville, Greenhorn mts. 1066 Comment
  RSA97251  Lomatium vaginatum F. W. Peirson 1930-5-15 8895 Kern Greenhorn Range, in hills northwest of Glenville 1067 Comment
  RSA87219  Lupinus peirsonii F. W. Peirson 1930-5-30 8904 Los Angeles North slope of Rock Creek 1372 Comment
  POM171942  Astragalus bernardinus F. W. Peirson 1930-5-31 8924 San Bernardino Summit of grade above Warrens Well. Little San Bern Mtns. 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
  RSA86685  Leymus triticoides F. W. Peirson 1930-7-1 8954 San Bernardino Southwest shore of Baldwin Lake Comment
  RSA90952  Erigeron divergens F. W. Peirson 1930-7-1 8959 San Bernardino Baldwin Lake 2043 Comment
  PASA549  Allium lacunosum Frank W. Peirson 1930-7-2 San Bernardino Ridge south of summit of Johnson's Grade, San Bernardino Mts. 2133 Comment
  RSA65929  Eriogonum kennedyi var. kennedyi F. W. Peirson 1930-7-2 8966 San Bernardino Ridge at summit of Johnson's Grade, east of Baldwin Lake. 2104 Comment
  RSA68962  Plantago purshii var. oblonga F. W. Peirson 1930-7-2 8967 San Bernardino Ridge south from summit of Johnsons Grade, east end of San Bernardino Mountains 2104 Comment
  RSA70598  Iris missouriensis Frank W. Peirson 1930-7-3 8980 San Bernardino Below Fish Hatchery, south of Baldwin Lake, San Bernardino Mountains. 2195 Comment
  RSA82385  Scutellaria siphocampyloides F. W. Peirson 1930-7-3 8977 San Bernardino Along a road leading to Fish Hatchery south of Baldwin Lake, San Bernardino Mountains 2134 Comment
  RSA86655  Purshia tridentata var. glandulosa F. W. Peirson 1930-7-3 8982 San Bernardino About 0.5 mile below Fish Hatchery south of Baldwin Lake. 2195 Comment
  PASA2375  Acer glabrum Frank W. Peirson 1930-7-4 San Bernardino Greene Creek, north slope Sugarloaf, San Bernardino Mts. 2438 Comment
  RSA74925  Phacelia hastata F. W. Peirson 1930-7-4 8998 San Bernardino Greene Creek, north slope of Sugerloaf. 2515 Comment
  RSA75947  Phacelia austromontana F. W. Peirson 1930-7-4 s.n. San Bernardino Green Creek, north slope of Sugarloaf, San Bernardino Mts. 2378 Comment
  RSA90251  Astragalus lentiginosus var. sierrae F. W. Peirson 1930-7-4 8991 San Bernardino Greene Creek, north slope of Sugarloaf Peak 2438 Comment
  RSA0063186  Heuchera parishii F. W. Peirson 1930-7-4 9000 San Bernardino Open ridge above Greene Creek Canyon, Sugarloaf Peak. 2591 Comment
  PASA481  Salvia carnosa Frank W. Peirson 1930-7-5 San Bernardino Road from Bear Lake to Holcomb Valley, San Bernardino Mts. 2133 Comment
  RSA74927  Phacelia imbricata subsp. patula F. W. Peirson 1930-7-5 9005 San Bernardino Quarry northwest of Baldwin Lake, San Bernardino Mountains. 2073 Comment
  RSA81443  Castilleja montigena F. W. Peirson 1930-7-5 9008 San Bernardino Road from Bear Lake to Holcomb Valley 2134 Comment
  RSA90184  Astragalus bicristatus F. W. Peirson 1930-7-5 9007 San Bernardino Road from Bear Lake to Holcomb Valley 2133 Comment
  RSA97414  Tauschia parishii F. W. Peirson 1930-7-5 9009 San Bernardino Road from Bear Lake to Holcomb Valley, San Bernardino Mts. 2133 Comment
  CAS-BOT-BC343815  Madia elegans F. W. Peirson 1930-7-7 9026 San Bernardino Arrastre Flat, San Bernardino Mts. 2286 Comment
  PASA156  Orthocarpus lasiorhynchus Frank W. Peirson 1930-7-7 San Bernardino Arrastre Flat, San Bernardino Mts. 2285 Comment
  RSA80058  Veronica peregrina subsp. xalapensis F. W. Peirson 1930-7-7 9018 San Bernardino Arrastre Flat 2287 Comment
  RSA86365  Pinus flexilis F. W. Peirson 1930-7-8 9037 San Bernardino Fish Hatchery creek [possibly Green Canyon Creek], north slope of Sugarloaf Peak, San Bernardino Mts. 2515 Comment
Read comments
Aug 15 2011
  PASA2061  Streptanthus major Frank W. Peirson 1930-7-8 San Bernardino Fish Hatcher Creek, Bear Valley, San Bernardino Mts. 2438 Comment
  POM171930  Muhlenbergia richardsonis F. W. Peirson 1930-8-3 9070 Inyo Rock Creek Lake Basin 3201 Comment
  RSA69771  Gentianopsis holopetala F. W. Peirson 1930-8-3 9068 Inyo Heart Lake, Rock Creek Lake Basin. 3201 Comment
  RSA82273  Castilleja lemmonii F. W. Peirson 1930-8-3 9062 Inyo shore of Heart Lake, Rock Creek Lake Basin. 3195 Comment
Read comments
Dec 19 2011
  RSA88662  Carex fissuricola F. W. Peirson 1930-8-3 9072 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
  RSA90903  Carex utriculata F. W. Peirson 1930-8-3 9074 Inyo On margin of Heart Lake, Rock Creek Lake Basin. 3201 Comment
  RSA0001040  Castilleja peirsonii F. W. Peirson 1930-8-4 9078 Inyo Upper Rock Creek Lake Basin. 3293 Comment
  CAS-BOT-BC22194  Carex helleri Frank W. Peirson 1930-8-5 9093 Inyo Summit of Mono Pass, Rock Creek Lake Basin, Sierra Nevada. 3657 Comment
  RSA91612  Carex congdonii F. W. Peirson 1930-8-5 9106 Inyo Gorge east of Mono Pass, Rock Creek Lake Basin 3598 Comment
  RSA93274  Ericameria discoidea F. W. Peirson 1930-8-5 9097 Inyo Rock Creek Lake Basin, Trail to Mono Pass 3596 Comment
  RSA94513  Arnica nevadensis F. W. Peirson 1930-8-5 9099 Inyo Gorge east of Mono Pass, Rock Creek Lake Basin 3628 Comment
  RSA94719  Senecio fremontii F. W. Peirson 1930-8-5 9094 Inyo East of summit of Mono Pass, Rock Creek Lake Basin 3628 Comment
  POM175532  Salix arctica F. W. Peirson 1930-8-7 9121 Inyo Rock Creek Lake Basin, valley south of Ruby Lake. 3445 Comment
  RSA33880  Sphaeromeria cana F. W. Peirson 1930-8-7 9115 Inyo Rock Creek Lake Basin, Sierra Nevada, northern Inyo [Co.] 3354 Comment
  RSA65071  Eriogonum incanum F. W. Peirson 1930-8-7 9124 Inyo Ruby Lake, Rock Creek Lake Basin. 3399 Comment
  RSA83957  Saxifraga nidifica F. W. Peirson 1930-8-7 9118 -a Inyo Valley southward from Ruby Lake, Rock Creek Lake Basin. 3476 Comment
  RSA83985  Saxifraga odontoloma F. W. Peirson 1930-8-7 9131 Inyo Spring on west shore of Ruby Lake, Rock Creek Lake Basin. 3399 Comment
  CAS-BOT-BC428636  Micranthes bryophora F. W. Peirson 1930-8-7 9117 Inyo Near summit of divide west of Long Lake, Rock Creek Lake Basin, Sierra Nevada 3474 Comment
  RSA78534  Carex vernacula F. W. Peirson 1930-8-7 13590 Inyo Stream south of Ruby Lake, Rock Creek Lake Basin. Comment
  RSA91120  Trifolium monanthum subsp. monanthum F. W. Peirson 1930-8-7 9122 Inyo West shore of Ruby Lake, Rock Creek Lake Basin, northern Inyo Co. 3399 Comment
  RSA84941  Ribes montigenum F. W. Peirson 1930-8-8 9137 Inyo West of Heart Lake, Rock Creek Lake Basin 3232 Comment
  RSA69791  Gentianella amarella F. W. Peirson 1930-8-8 9142 Inyo West of Heart Lake, Rock Creek Lake Basin. 3201 Comment
  RSA93644  Antennaria rosea F. W. Peirson 1930-8-8 9139 Inyo West of Heart Lake, foot of rock parapet, northern Inyo County 3232 Comment
  RSA94910  Cirsium scariosum F. W. Peirson 1930-8-8 9149 Inyo West of Heart Lake, Rock Creek Lake Basin 3201 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
  RSA69510  Veratrum californicum Frank W. Peirson 1930-8-9 9161 Inyo In Ruby Stream, Rock Creek Lake Basin, northern Inyo Co. 3323 Comment
  RSA69746  Luzula parviflora F. W. Peirson 1930-8-9 9168 Inyo Ruby Lake stream west of Heart Lake, Rock Creek Lake Basin. 3232 Comment
  RSA92864  Chaenactis alpigena F. W. Peirson 1930-8-9 9156 Inyo E of Heart Lake, Rock Creek Lake Basin 3537 Comment
  RSA94515  Arnica amplexicaulis F. W. Peirson 1930-8-9 9159 Inyo In Ruby Stream, Rock Creek Lake Basin, northern Inyo Co. 3323 Comment
  RSA86682  Cercocarpus ledifolius F. W. Peirson 1930-8-11 9175 Inyo Above Rock Creek Lake, Rock Creek Lake Basin, Northern Inyo county. 3018 Comment
  CAS-BOT-BC332950  Senecio spartioides Frank W. Peirson 1930-8-11 9179 Mono North of Deadman Creek 2438 Comment
  RSA0013670  Senecio spartioides F. W. Peirson 1930-8-11 9179 Mono Volcanic mountains north of Deadman Creek. 2439 Comment
  RSA93858  Chrysothamnus parryi subsp. asper F. W. Peirson 1930-8-11 9177 Mono Volcanic mountains north of Deadman Creek. 2439 Comment
  POM171920  Astragalus canadensis var. brevidens F. W. Peirson 1930-8-12 9197 Mono North shore of Mono Lake 1966 Comment
  RSA65362  Atriplex canescens F. W. Peirson 1930-8-12 9203 Mono N shore of Mono Lake. E of Sierra Nevada. 1966 Comment
  RSA90191  Astragalus casei F. W. Peirson 1930-8-12 9188 Mono Just back of willows on shore of Mono Lake. 1966 Comment
  RSA91067  Phacelia humilis var. humilis F. W. Peirson 1930-8-12 9190 Mono Shore of Mono Lake. 1966 Comment
  RSA93664  Solidago spectabilis F. W. Peirson 1930-8-12 9192 Mono Mono Lake 1966 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
  RSA0016778  Hippuris vulgaris F. W. Peirson 1930-8-14 9222 Tuolumne Pool near river at Soda Spring, Tuolumne Meadows. 2622 Comment
  RSA93146  Aster occidentalis F. W. Peirson 1930-8-14 9220 Tuolumne Tuolumne Meadows, Sierra Nevada. 2591 Comment
  PASA1835  Ligusticum grayi Frank W. Peirson 1930-8-15 Mariposa Lake Tenaya Region 2499 Comment
  RSA87414  Lupinus latifolius subsp. longipes F. W. Peirson 1930-8-15 9227 Mariposa Murphy Creek, Lake Tenaya region, Yosemite National Park. 2500 Comment
  RSA91615  Carex athrostachya F. W. Peirson 1930-8-17 9236 Mariposa meadow opposite Glacier Point, Yosemite Valley floor 1220 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
  RSA93030  Erigeron strigosus F. W. Peirson 1930-8-17 9240 Mariposa Floor of Yosemite Valley opposite Glaicer Point, Yosemite National Park 1220 Comment
  CAS-BOT-BC304324  Galinsoga parviflora F. W. Peirson 1931-4-11 9375 Los Angeles 1077 New York Ave, Altadena Comment
  UC501447  Galinsoga parviflora var. parviflora Frank W. Peirson 1931-4-11 9375 Los Angeles 1077 New York Avenue Altadena Comment
  SD87673  Salix orestera Frank W. Peirson 1931-7-17 9428 Inyo Rock Creek Lake Basin, along Ruby stream 3261 Comment
  RSA64809  Chenopodium atrovirens F. W. Peirson 1931-7-17 9439 Inyo Heart Lake, Rock Creek Lake Basin, northern Inyo Co. 3232 Comment
  RSA72162  Epilobium hornemannii subsp. hornemannii F. W. Peirson 1931-7-17 9597 Inyo About 1/4 mile south of Ruby Falls, Rock Creek Lake Basin. 3323 Comment
  POM175516  Arabis inyoensis F. W. Peirson 1931-7-18 9455 Inyo Along rock ridge on E shore of Long Lake, Rock Creek Lake Basin 3247 Comment
  RSA66166  Erysimum capitatum var. perenne F. W. Peirson 1931-7-18 9458 Inyo On east shore of Long Lake, Rock Creek Lake Basin. 3247 Comment
  RSA80045  Castilleja nana F. W. Peirson 1931-7-18 9487 Inyo Upper basin near Chickenfoot Lake, Rock Creek Lake Basin. 3277 Comment
  RSA65471  Rumex salicifolius var. denticulatus F. W. Peirson 1931-7-19 9430 Inyo East slope Rock Creek Lake Basin. 3317 Comment
  RSA66549  Draba breweri F. W. Peirson 1931-7-19 9452 Inyo Trail to cirque on E slope, Rock Creek Lake Basin 3262 Comment
  RSA85743  Potentilla flabellifolia F. W. Peirson 1931-7-19 9478 Inyo Rock Creek Lake Basin, Sierra Nevada. 3354 Comment
  RSA90970  Erigeron coulteri F. W. Peirson 1931-7-21 9502 Inyo West shore of Long Lake, Rock Creek Lake Basin 3232 Comment
  RSA84214  Sedum lanceolatum F. W. Peirson 1931-7-22 9459 Inyo rocky places high above the south shore of Ruby Lake, Rock Creek Lake Basin, 3445 Comment
  RSA80223  Penstemon rostriflorus F. W. Peirson 1931-7-23 9492 Inyo East of Heart Lake, Rock Creek Lake Basin, northern Inyo Co. 3232 Comment
  JEPS45575  Cercocarpus ledifolius Frank W. Peirson 1931-7-25 9470 Inyo ridge near Heart Lake (Rock Creek Lake Basin); Rock Creek Lake Basin 3200 Comment
  RSA86683  Cercocarpus ledifolius F. W. Peirson 1931-7-25 9470 Inyo Heart Lake, Rocky Creek Lake Basin, northern Inyo county 3232 Comment
  RSA86653  Purshia tridentata var. tridentata F. W. Peirson 1931-7-28 9469 Inyo Transverse Ridge, Rock Creek Lake Basin. 3201 Comment
  CAS-BOT-BC118847  Carex praeceptorum Frank Warrington Peirson 1931-7-30 9417 Inyo Rock Creek Lake Basin at Ruby Falls. 3322 Comment
  RSA86345  Juniperus occidentalis var. australis F. W. Peirson 1931-7-30 9395 Inyo Along Ruby Stream. Rock Creek Lake Basin, at 10,800 ft. 3293 Comment
  CAS-BOT-BC189468  Cryptantha circumscissa var. circumscissa Frank W. Peirson 1931-7-31 9485 Inyo Rock Creek Lake Basin, roadside below Heart Lake 3169 Comment
  RSA87058  Hordeum jubatum F. W. Peirson 1931-7-31 9410 Inyo Heart Lake, Rock Creek Lake Basin 3201 Comment
  UC698495  Eleocharis acicularis Frank W. Peirson 1931-7-31 9413 Inyo drying pond on Escarpment w Heart Lake; Rock Creek Lake Basin 3352 Comment
  CAS-BOT-BC217523  Galium hypotrichium subsp. hypotrichium Frank W. Peirson 1931-8-2 9498 Inyo Rock Creek Lake Basin 3413 Comment
  CAS-BOT-BC294950  Erigeron clokeyi Frank W. Peirson 1931-8-2 s.n. Inyo Rock Creek Lake Basin 3291 Comment
  RSA67143  Galium hypotrichium subsp. hypotrichium F. W. Peirson 1931-8-2 9498 Inyo Slope west of Heart Lake, Rock Creek Lake Basin. 3415 Comment
  RSA87354  Melica stricta F. W. Peirson 1931-8-2 9406 Inyo Heart Lake, Rock Creek Lake Basin Comment
  SD87683  Erigeron clokeyi Frank W Peirson 1931-8-2 Inyo Rock Creek Lake Basin, west of Heart Lake 3290 Comment
  RSA92116  Carex senta F. W. Peirson 1931-8-2 9414 Inyo Near Heart Lake, Rock Creek Lake Basin, northern Inyo County. 3201 Comment
  RSA87120  Agrostis pallens F. W. Peirson 1931-8-7 9526 Alpine above Grass Lake. Glen Alpine Creek Basin 2287 Comment
  POM84481  Aconitum columbianum var. columbianum F. W. Peirson 1931-8-7 9521 El Dorado Glen Alpine Creek Basin. 2226 Comment
  RSA91742  Muhlenbergia richardsonis F. W. Peirson 1931-8-7 9527 El Dorado Above Grass Lake, Glen Alpine Creek Basin 2256 Comment
  RSA91957  Glyceria striata F. W. Peirson 1931-8-7 9533 El Dorado Trail to Grass Lake above Glen Alpine. 2134 Comment
  RSA86746  Elymus glaucus F. W. Peirson 1931-8-8 9534 El Dorado Lake of the Woods Trail; Glen Alpine Creek Basin 2256 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
  RSA95191  Arnica longifolia F. W. Peirson 1931-8-9 9541 El Dorado Great masses where East Trail and Middle Trail join, Mt. Tallac, Sierra Nevada 2622 Comment
  RSA72653  Helianthella californica var. nevadensis F. W. Peirson 1931-8-10 9572 Nevada On banks of Yuba River, Sierra Camp, 4 miles west of Donner Pass 2058 Comment
  RSA69685  Mentzelia affinis F. W. Peirson 1932-3-21 9791 Imperial 10 miles N of Ogilby, Eastern Imperial County Comment
  RSA77416  Brandegea bigelovii F. W. Peirson 1932-3-21 9790 Imperial Desert 10 mi. N of Ogilby. 152 Comment
  UC501479  Chylismia claviformis subsp. yumae Frank W. Peirson 1932-3-21 9768 Imperial 6 mi e Holtville (slightly above sea level) Comment
  RSA0108306  Cryptantha costata F. W. Peirson 1932-3-21 9773 Imperial 10 miles east of Holtville. 23 Comment
  RSA90745  Astragalus magdalenae var. peirsonii F. W. Peirson 1932-3-21 9776 Imperial The east edge of the Sand Hills east of Holtville 60 Comment
  UC908900  Gilia stellata Frank W. Peirson 1932-3-22 9803 Imperial Midway Well Midway Well (eastern Imperial County) 152 Comment
  RSA91430  Dalea mollis F. W. Peirson 1932-3-22 9811 Riverside 20 miles North of Blythe on the road to Needles, Eastern Riverside. 152 Comment
  RSA74173  Phacelia ambigua F. W. Peirson 1932-3-23 9814 San Bernardino Along base of desert hills,18 miles S of Needles on Blythe Road Comment
  RSA74496  Phacelia neglecta F. W. Peirson 1932-3-24 9834 San Bernardino Baker. Along southwest base of rocky hills. Comment
  RSA75120B  Nemacladus orientalis F. W. Peirson 1932-3-24 s.n.-b San Bernardino Near the town of Baker. 280 Comment
  RSA66154  Erysimum capitatum var. capitatum F. W. Peirson 1932-3-25 9837 San Bernardino 8 miles from Barstow on road to Victorville 701 Comment
  UC501597  Erysimum capitatum var. capitatum Frank W. Peirson 1932-3-25 9837 San Bernardino on Victorville Rd 8 mi from Barstow 670 Comment
  RSA65884  Monolepis nuttalliana F. W. Peirson 1932-4-17 9849 Los Angeles Near dam head, Lovejoy Buttes, Mohave Desert 762 Comment
  RSA68785  Delphinium parishii F. W. Peirson 1932-4-17 9854 Los Angeles Below the Lovejoy Dam, Lovejoy Buttes, Mojave Desert. 762 Comment
  UC483091  Salix exigua Frank W. Peirson 1932-5-6 9900 a Inyo <Wild> Rose Canyon; Panamint Mts. 1143 Comment
  UC501442  Phlox stansburyi Frank W. Peirson 1932-5-6 9904 Inyo Wild Rose Canyon Panamint Mts. 1981 Comment
  RSA71848  Gilia cana subsp. triceps F. W. Peirson 1932-5-6 9902 Inyo Wild Rose Canyon, Panamint Mts. 1143 Comment
  RSA90762  Astragalus purshii var. tinctus F. W. Peirson 1932-5-6 9905 Inyo Wild Rose Canyon, Panamint Mountains. 1982 Comment
  CAS-BOT-BC305829  Heliomeris multiflora var. nevadensis Frank W. Peirson 1932-5-7 9912 Inyo North Fork Hanaupah Canyon, Panamint Mts. 1828 Comment
  POM72232  Camissonia pterosperma F. W. Peirson 1932-5-7 9919 Inyo Light soil on south bank of North Fork of Hanaupah Canyon, Panamint Mts. 1829 Comment
  RSA68963  Plantago purshii var. oblonga F. W. Peirson 1932-5-7 9920 Inyo North fork of Hanaupah Canyon, Panamint Mountains. 2134 Comment
  RSA86211  Cheilanthes parryi F. W. Peirson 1932-5-7 9921 Inyo North fork of Hanaupah Canyon, Panamint Mountains. 2134 Comment
  RSA90320  Lotus humistratus F. W. Peirson 1932-5-7 9909 Inyo North fork of Hanaupah Canyon, Panamint Mountains. 2134 Comment
  RSA92305  Poa fendleriana F. W. Peirson 1932-5-7 9913 Inyo North fork of Hanaupah Canyon, Panamint Mountains. 2134 Comment
  UC501549  Tricardia watsonii Frank W. Peirson 1932-5-7 9923 Inyo North Fork Hanaupah Canyon; Panamint Mts. 1828 Comment
  RSA92522  Viguiera multiflora var. nevadensis F. W. Peirson 1932-5-7 9912 Inyo North Fork of Hanaupah Canyon, Panamint Mountains 1829 Comment
  RSA80346  Cymopterus panamintensis var. panamintensis F. W. Peirson 1932-5-8 9931 Inyo Wild Rose Canyon, Panamint Mountains. 2439 Comment
  RSA68654  Calochortus flexuosus Frank W. Peirson 1932-5-9 9442 Inyo Above Keane Spring, Funeral Mountains. 1341 Comment
  RSA91970  Elymus multisetus F. W. Peirson 1932-5-9 9946 Inyo Near Keane Spring, Funeral Mountains. 1250 Comment
  RSA72143  Gayophytum decipiens F. W. Peirson 1932-5-28 9965 San Bernardino southwest shores of Baldwin Lake, San Bernardino Mountains. 2058 Comment
  UC501550  Hesperochiron californicus Frank W. Peirson 1932-5-28 9964 San Bernardino flats along s.w. shore Baldwin Lake; San Bernardino Mts., Baldwin Lake 2042 Comment
  UC501580  Astragalus bicristatus Frank W. Peirson 1932-5-28 San Bernardino sw side Baldwin Lake San Bernardino Mts., Baldwin Lake 2057 Comment
  RSA91903  Phalaris californica F. W. Peirson 1932-6-6 10257 Mendocino near Hale's Grove Auto Camp Comment
  RSA73082  Linanthus dichotomus subsp. dichotomus F. W. Peirson 1932-6-10 3558 Ventura Mount Pinos. Seymour Creek. 1799 Comment
  RSA632116  Dudleya cymosa subsp. pumila F. W. Peirson 1932-6-26 877 Los Angeles San Gabriel Canyon 335 Comment
  RSA90274  Polypogon viridis F. W. Peirson 1932-7-4 10239 San Luis Obispo Oceano. Comment
  RSA611928  Polypogon interruptus F. W. Peirson 1932-7-6 10869 Mendocino Navarro River. Dimmick Memorial Park. Comment
  RSA79882  Datura stramonium F. W. Peirson 1932-7-6 10252 Mendocino Navarro River. Dimmick Memorial Park. Comment
  RSA82200  Trichostema laxum F. W. Peirson 1932-7-6 10248 Mendocino Navarro River. Dimmick Memorial Park. Comment
  RSA85524  Calycanthus occidentalis F. W. Peirson 1932-7-6 10250 Mendocino Dimmick Memorial Park; Navarro River. Comment
  RSA87346  Galium aparine F. W. Peirson 1932-7-6 10247 Mendocino Navarro River. Dimmick Memorial Park. Comment
  PASA1789  Chrysopsis oregona Frank W. Peirson 1932-7-6 Mendocino Dimmick Memmorial Park, Navarro River Comment
  RSA67142  Galium muricatum F. W. Peirson 1932-7-7 10263 Humboldt Willow Creek. A few miles above town of that name. Comment
  RSA91384  Hesperolinon micranthum F. W. Peirson 1932-7-8 10264 Shasta Hill Crest Au to Camp on the Redding to Burney Road. 1006 Comment
  RSA95166  Hieracium scouleri F. W. Peirson 1932-7-9 10296 Shasta Burney Spring. 1433 Comment
  RSA77805  Cynoglossum occidentale F. W. Peirson 1932-7-10 10207 Shasta Near Lake Eiler, Thousand-Lake Basin. 1951 Comment
  CAS-BOT-BC115053  Carex vesicaria Frank Warrington Peirson 1932-7-10 10116 Shasta Margina of Lake Eiler, 1000-Lake Basin 1950 Comment
  SD87713  Pedicularis semibarbata Frank W. Peirson 1932-7-10 10216 Shasta 1000-Lake Basin 1951 Comment
  RSA99354  Symphoricarpos vaccinioides F. W. Peirson 1932-7-11 10225 Shasta Forest borders about the lakes, Thousand-Lake Basin. Comment
  JEPS71067  Collomia tinctoria Frank W. Peirson 1932-7-12 10200 Shasta s Burney (on rim of Red Crater); 1000 Lake Basin 2072 Comment
  RSA69655  Spiranthes porrifolia Frank W. Peirson 1932-7-12 10133 Shasta Along shore of Lake Eiler. Thousand-Lake Basin. 1951 Comment
  RSA80708  Hypericum androsaemum F. W. Peirson 1932-7-12 13465 Shasta Shores of Lake Eiler, Thousand-Lake Basin Comment
  UC501465  Collomia tinctoria Frank W. Peirson 1932-7-12 10200 Shasta on rim Red Crater (s of Burney); 1000-Lake Basin 2072 Comment
  RSA70329  Asclepias cordifolia F. W. Peirson 1932-7-12 s.n. Shasta Thousand Lake Basin 2012 Comment
  RSA70448  Allium campanulatum F. W. Peirson 1932-7-12 10129 Shasta Trail below camp; Thousand-Lake Basin. 1951 Comment
  RSA92713  Salix lemmonii F. W. Peirson 1932-7-12 10134 Shasta Along shore of Lake Eiler. Thousand-Lake Basin. 1951 Comment
  UC501577  Trifolium kingii var. productum Frank W. Peirson 1932-7-13 10177 Shasta s Burney (1000-Lake Basin) 1950 Comment
  UC501606  Rhamnus rubra Frank W. Peirson 1932-7-13 10179 Shasta s of Burney; 1000-Lake Basin 1950 Comment
  RSA91575  Trifolium productum F. W. Peirson 1932-7-13 10177 Shasta Thousand Lake Basin Comment
  UC501595  Ribes nevadense Frank W. Peirson 1932-7-14 10161 Shasta s Burney; 1000-Lake Basin 1950 Comment
  UC696740  Penstemon neotericus Frank W. Peirson 1932-7-14 10219 a Shasta rocky locations on ridge e Lake Eiler (1000-Lake Basin, eastern Shasta County); 1000-Lake Basin, e of Lake Eiler 1950 Comment
  RSA0018034  Ribes roezlii F. W. Peirson 1932-7-14 10160 Shasta Eiler Butte, Thousand-Lake Basin. 2012 Comment
  RSA95154  Hieracium horridum F. W. Peirson 1932-7-14 10228 Shasta South slope of Eiler Butte, Thousand-Lake Basin. 1982 Comment
  NY590187  Penstemon davidsonii var. davidsonii F. W. Peirson 1932-7-15 10217 Shasta On east slope of Mount Magee; 1000-Lake Basin 2286.0 Comment
  RSA69237  Phyllodoce breweri F. W. Peirson 1932-7-15 10194 Shasta Lake at east end of Mt. Magee, Thousand Lake Basin. 2195 Comment
  UC501430  Collomia grandiflora Frank W. Peirson 1932-7-16 10308 Shasta top of wooded slope behind camp Burney Spring 1432 Comment
  RSA0013794  Nuphar lutea subsp. polysepala F. W. Peirson 1932-7-16 10146 Shasta Thousand-Lake Region. 1951 Comment
  RSA93391  Symphoricarpos acutus F. W. Peirson 1932-7-16 10224 Shasta Thousand-Lake Basin. 1951 Comment
  RSA95227  Stephanomeria lactucina F. W. Peirson 1932-7-16 10229 Shasta Along trail below camp and Thousand-Lake Basin. 1951 Comment
  SEINET10972517  Heterocodon rariflorum Frank W. Peirson 1932-7-17 Peirson 10332 Shasta WET PLACES AT BORDER OF MARSHY FIELD, WALLACE R., GOOSE VALLEY Comment
  RSA65956  Eriogonum umbellatum var. polyanthum F. W. Peirson 1932-7-19 10343 Shasta Mt. Lassen. 1829 Comment
  UC501569  Sclerolinon digynum Frank W. Peirson 1932-7-19 10352 Plumas near Chester; Feather River 1463 Comment
  RSA91391  Trifolium cyathiferum F. W. Peirson 1932-7-19 10346 Plumas Feather River. Near Chester. 1463 Comment
  CAS-BOT-BC312844  Hymenoxys lemmonii Frank W. Peirson 1932-7-20 10356 Plumas Sierra Valley, probably Plumas County. North of Loyalton Comment
  UC483084  Salix jepsonii Frank W. Peirson 1932-7-22 10374 Mono along Robinson Creek below Barney Lake; Twin Lake Basin 2438 Comment
  RSA93442  Brickellia grandiflora F. W. Peirson 1932-7-22 10370 Mono Robinson Creek along the steep slope below Barney Lake, Twin Lakes Basin 2439 Comment
  RSA95104  Crepis acuminata F. W. Peirson 1932-7-22 10364 Mono Steep slope below Barney Lake and along Robinson Creek, Twin Lake Basin. 2439 Comment
  PASA2203  Helenium hoopesii Frank W. Peirson 1932-7-23 Mono East slope Sonora Pass 2590 Comment
  RSA66763  Arabis divaricarpa F. W. Peirson 1932-7-23 10380 Mono East side of Sonora Pass. 2591 Comment
  CAS-BOT-BC153702  Diplacus mephiticus F. W. Peirson 1932-7-24 10397 Tuolumne Slopes above Relief Reservoir, Stanislaus River Region 2286 Comment
  UC501443  Arnica longifolia Frank W. Peirson 1932-7-24 10398 Tuolumne above, (along small stream on rocky slope, Stanislaus River region) Relief Reservoir; Stanislaus River 2286 Comment
  POM274965  Adenostoma sparsifolium F. W. Peirson 1932-9-4 10471 San Diego Campo to Bukman Spring 671 Comment
  SEINET675828 Image available Artemisia vulgaris Frank W. Peirson 1932-11-12 10486 San Bernardino Forest border with A. tridentata. Southwest of Baldwin Lake, San Bernadino Mountains 2058 Comment
  RSA90905  Chrysothamnus nauseosus subsp. hololeucus F. W. Peirson 1932-11-12 10488 San Bernardino Forested areas on mesa S of Baldwin Lake, San Bernardino Mts 2134 Comment
  RSA70999  Cuscuta umbellata F. W. Peirson 1932-11-26 9659 Riverside Thousand Palms Comment
  RSA64582  Eriogonum pusillum F. W. Peirson 1933-4-13 10642 Riverside Deep Canyon to Idyllwild, Santa Rosa Mountains 1372 Comment
  UC511829  Salvia vaseyi Frank W. Peirson 1933-4-13 10635 Riverside road from Deep Canyon to Idyllwild 487 Comment
  UC511831  Forestiera pubescens Frank W. Peirson 1933-4-13 10647 Riverside road from Deep Canyon to Idyllwild (at Palm Creek crossing) 1386 Comment
  RSA71802  Gilia stellata F. W. Peirson 1933-4-16 10640 Riverside Deep Canyon to Idyllwild road 1067 Comment
  RSA75344  Phacelia bicolor F. W. Peirson 1933-5-13 10664 Los Angeles About 10 miles south of Munroc, Western Mojave Desert. Comment
  CAS-BOT-BC204886  Acmispon argyraeus var. argyraeus Frank W. Peirson 1933-6-24 10677 San Bernardino Along ridge southward from the summit of the Johnson Grade, San Bernardino Mts. 2133 Comment
  CAS-BOT-BC67804  Marsilea vestita Frank W. Peirson 1933-6-25 10674 San Bernardino San Bernardino Mts. - two miles southeast of Baldwin Lake 2133 Comment
  POM203378  Descurainia pinnata subsp. halictorum F. W. Peirson 1933-6-25 10673 San Bernardino in a low open valley southeast of Baldwin Lake, about 2 miles east of Fish Hatchery, San Bernardino Mountains 2133 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
  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
  RSA68755  Delphinium gracilentum F. W. Peirson 1933-7-9 10695 Kern 2 miles south of Summit Camp, Greenhorn Mountains. 2073 Comment
  RSA73315  Clarkia cylindrica F. W. Peirson 1933-7-9 10678 Kern About 6 miles from Caliente on road to Bodfish. Comment
  RSA79468  Collinsia torreyi var. wrightii F. W. Peirson 1933-7-9 10693 Kern 2 miles south of Summit Camp, Greenhorn Mountains. 2073 Comment
  RSA87318  Galium bifolium F. W. Peirson 1933-7-9 10698 Kern 2 miles south of Summit Camp, Greenhorn Mountains. 2073 Comment
  UC511744  Vicia americana var. americana Frank W. Peirson 1933-7-9 10690 Kern Summit Greenhorn Mts.; s of Summit Camp 2072 Comment
  UC511904  Perideridia pringlei Frank W. Peirson 1933-7-9 10687 Kern about 6 mi s Bodfish (road from Caliente to Bodfish) Comment
  UC511918  Penstemon speciosus Frank W. Peirson 1933-7-9 10701 Kern in clearing along Power Line near Summit Camp; Summit Greenhorn Mts. 2072 Comment
  CAS-BOT-BC241607  Eriogonum baileyi var. baileyi Frank W. Peirson 1933-7-28 10713 Mono Summit Sherwin Hill 1950 Comment
  RSA66062  Rorippa palustris subsp. occidentalis F. W. Peirson 1933-7-28 10709 Inyo [Lower] Rock Creek 1372 Comment
  RSA0125171  Eriastrum wilcoxii F. W. Peirson 1933-7-28 10717 Mono Summit of Sherwin Hill, [north of Bishop] 1951 Comment
  CAS-BOT-BC229053  Astragalus lemmonii Frank W. Peirson 1933-7-29 10744 Mono Hilton Creek, Owens River 2042 Comment
  RSA68344  Lepidium montanum var. canescens F. W. Peirson 1933-7-29 10724 Mono Floor of Crooked Creek Canyon and at foots of its walls; Owens River. 2043 Comment
  RSA77885  Tiquilia nuttallii F. W. Peirson 1933-7-29 10721 Mono Along foot of canyon walls of Crooked Creek, Owens River. 2043 Comment
  POM359538  Pyrrocoma lanceolata F. W. Peirson 1933-7-29 10748 Mono Along the river road at the foot of Whisky Creek, Owens River. 2043 Comment
  RSA0006796  Astragalus lentiginosus var. ineptus F. W. Peirson 1933-7-29 10743 Mono Owens River, along Hilton Creek. 2043 Comment
  RSA66830  Thelypodium laciniatum F. W. Peirson 1933-7-29 10723 Mono Crooked Creek Canyon, Owens Valley 2043 Comment
  RSA71942  Collomia linearis F. W. Peirson 1933-7-29 10742 Mono Along Hilton Creek, Owens River. 2043 Comment
  RSA87465  Lupinus meionanthus F. W. Peirson 1933-7-29 10750 Mono Along the river south of Whisky Creek, Owens River. 2043 Comment
  RSA90714  Astragalus lemmonii F. W. Peirson 1933-7-29 10744 Mono Along Hilton Creek, Owens River. 2043 Comment
  RSA93236  Pyrrocoma lanceolata F. W. Peirson 1933-7-29 10749 Mono River flats south of Whisky Creek, Owens River. 2043 Comment
  RSA94672  Senecio spartioides F. W. Peirson 1933-7-29 10745 Mono Along the road along Owens river. 2043 Comment
  UC511806  Pedicularis crenulata Frank W. Peirson 1933-7-30 Mono Convict Creek 2148 Comment
  UC511729  Astragalus lentiginosus var. albifolius Frank W. Peirson 1933-7-31 10758 Mono n shore Mono Lake; n shore Mono Lake 1965 Comment
  PASA1557  Mentzelia torreyi Frank W. Peirson 1933-8-1 Mono North slope Mono Lake Comment
  PASA1949  Oreocarya confertiflora Frank W. Peirson 1933-8-1 Mono North shore, Mono Lake 1965 Comment
  RSA70234  Allium validum F. W. Peirson 1933-8-3 10799 Inyo West side of Ruby Lake, Rock Creek Lake Basin. 3399 Comment
  JEPS3781  Castilleja peirsonii Frank W. Peirson 1933-8-4 10784 Inyo South of Long Lake; Rock Creek Lake Basin 3291 Comment
  RSA66225  Arabis platysperma F. W. Peirson 1933-8-4 10786 Inyo Rock Creek Lake Basin. Broken country S of Long Lake 3323 Comment
  RSA88665  Carex illota F. W. Peirson 1933-8-4 10831 Inyo South of Long Lake, Rock Creek Lake Basin. 3262 Comment
  SBBG54412  Juncus parryi F. W. Peirson 1933-8-4 Inyo Rock Crk Lake Basin, S of Long Lake 3352 Comment
  RSA611929  Poa secunda F. W. Peirson 1933-8-5 10827 Inyo Drier parts of the Heart Lake Meadow, Rock Creek Lake Basin 3216 Comment
  UC511812 Image available Lorandersonia peirsonii Frank W. Peirson 1933-8-5 Inyo on Transverse Ridge; Rock Creek Lake Basin; Rock Creek Lake Basin, Inyo Co. 3383 Comment
  UC511886  Poa secunda subsp. secunda Frank W. Peirson 1933-8-5 10827 Inyo Hear Lake Meadow Rock Creek Lake Basin 3200 Comment
Read comments
May 31 2012
  RSA93088  Erigeron clokeyi var. pinzliae F. W. Peirson 1933-8-5 10787 Inyo soil pockets on Transverse Ridge, Rock Creek Lake Basin 3293 Comment
  UC511813  Astragalus lentiginosus var. ineptus Frank W. Peirson 1933-8-5 Inyo on the Transverse Ridge , on the Transverse Ridge (Rock Creek Lake Basin) 3352 Comment
  UC511817  Packera cana Frank W. Peirson 1933-8-5 10776 Inyo Rock Cr. Lake Basin , high Transverse Ridge (high Transverse Ridge) 3413 Comment
  RSA87462  Elymus trachycaulus subsp. trachycaulus F. W. Peirson 1933-8-7 10866 Inyo Long Lake, Rock Creek Lake Basin, northern Inyo County. 3247 Comment
  UC511815  Lomatium torreyi Frank W. Peirson 1933-8-7 10771 Inyo slope w. Long Lake (Rock Creek Lake Basin); Rock Creek Lake Basin 3352 Comment
  POM188541  Arabis repanda var. greenei F. W. Peirson 1933-8-8 10768 Inyo West of Heart Lake, Rock Creek Lake Basin 3506 Comment
  UCD93742  Trisetum spicatum F. W. Peirson 1933-8-8 s.n. Inyo Rock Creek Lake Basin, west of Heart Lake. 3352 Comment
  RSA91613  Carex congdonii F. W. Peirson 1933-8-8 10835 Inyo West of Heart Lake, Rock Creek Lake Basin. 3383 Comment
  SEINET179667 Image available Poa stebbinsii Frank W. Peirson 1933-8-9 10821 Inyo Rock Creek Lake Basin, recess on east shore. 3292 Comment
  UC511856  Trichophorum clementis Frank W. Peirson 1933-8-10 10766 Inyo along stream below Ruby Lake; Rock Creek Lake Basin, below Ruby Lake 3352 Comment
  UCD85952  Koeleria macrantha F. W. Peirson 1933-8-11 s.n. Inyo Rock Creek Basin. In first meadow below Heart Lake. 3200 Comment
  CAS-BOT-BC117703  Carex simulata Frank Warrington Peirson 1933-8-11 10836 Inyo Rock Creek Lake Basin, meadow at Heart Lake. 3200 Comment
  CAS-BOT-BC18532  Carex abrupta Frank W. Peirson 1933-8-11 10832 Inyo Rock Creek Lake Basin. Meadow at Heart Lake . 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
  POM273773  Descurainia californica F. W. Peirson 1933-8-11 s.n. Inyo Rock Creek Lake Basin, Escarpment west of Heart Lake. 3232 Comment
  SEINET7548181 Image available Carex abrupta Frank W. Peirson 1933-8-11 10845 Inyo Rock Creek Lake Basin 3200 Comment
  CAS-BOT-BC117124  Carex spectabilis Frank Warrington Peirson 1933-8-12 s.n. Inyo Rock Creek Lake Basin. Rocky slopes above Glacial Lakes. 3474 Comment
  JEPS67191  Luzula comosa Frank W. Peirson 1933-8-13 10803 Inyo meadow at Heart Lake; Rock Creek Lake Basin, meadow at Heart Lake 3230 Comment
  RSA68705  Lilium kelleyanum Frank W. Peirson 1933-8-13 10796 Inyo Heart Lake Meadow, Rock Creek Lake Basin, Sierra Nevada. 3232 Comment
  SEINET7575690 Image available Carex specifica Frank W. Peirson 1933-8-13 10849 Inyo Rock Creek Lake Basin. 3200 Comment
  SEINET8078276  Stipa nelsonii F. W. Peirson 1933-8-13 s.n. Inyo Rock Creek Lake Basin, Heart Lake. 3200 Comment
  CAS-BOT-BC519379  Triantha occidentalis subsp. occidentalis Frank W. Peirson 1933-8-14 s.n. Inyo Near Morgan Pass Lakes, Rock Creek Lake Basin 3322 Comment
  RSA91686  Poa secunda F. W. Peirson 1933-8-15 10868 Inyo Rock Creek Lake Basin, Inyo. 3506 Comment
  UC511844  Polygonum Frank W. Peirson 1933-8-15 Inyo near Heart Lake (Rock Creek Basin); Rock Creek Basin 3200 Comment
  JEPS37043  Artemisia dracunculus Frank W. Peirson 1933-8-18 s.n. Inyo Rock Creek Lake Basin, slope west of Long Lake 3261 Comment
Read comments
Dec 3 2015
  UC511731  Adiantum aleuticum Frank W. Peirson 1933-8-18 Inyo w shore Long Lake; Rock Creek Lake Basin 3246 Comment
  UC511764  Artemisia ludoviciana subsp. incompta Frank W. Peirson 1933-8-18 Inyo w shore Long Lake; Rock Creek Lake Basin 3261 Comment
  RSA97465  Perideridia parishii subsp. latifolia F. W. Peirson 1933-8-19 10792 Inyo Ruby Falls, Rock Creek Lake Basin, northern Inyo [Co.] 3323 Comment
  RSA65510  Silene bernardina F. W. Peirson 1933-8-20 10863 Inyo Rock Creek Lake Basin, Sierra Nevada 3293 Comment
  UC511864  Silene Frank W. Peirson 1933-8-20 10863 Inyo steep mountain slope w Heart Lake (Rock Creek Lake Basin); , w of Heart Lake 3291 Comment
  UCD93743  Trisetum spicatum F. W. Peirson 1933-8-21 10870 Inyo Sierra Nevada, Rock Creek Lake Basin, upper Ruby Lake. 3505 Comment
  CAS-BOT-BC218399  Comastoma tenellum Frank W. Peirson 1933-8-22 s.n. Inyo Upper part of Heart Lake Meadow, Rock Creek Lake Basin 3230 Comment
  RSA92139  Eleocharis quinqueflora F. W. Peirson 1933-8-22 10790 Inyo Heart Lake Meadow, Rock Creek Lake Basin, Sierra Nevada 3201 Comment
  UC599251  Gentianella tenella subsp. tenella Frank W. Peirson 1933-8-22 Inyo upper part Heart Lake Meadow; Rock Creek Lake Basin 3230 Comment
  RSA65804  Lepidium virginicum var. robinsonii F. W. Peirson 1934-3-25 11032 Santa Barbara Santa Cruz Island. Near Fry s Harbor Comment
  RSA71106  Calystegia macrostegia subsp. macrostegia F. W. Peirson 1934-3-25 11022 Santa Barbara Santa Cruz island, Frye's harbor. Comment
  RSA82105  Mimulus aurantiacus var. parviflorus F. W. Peirson 1934-3-25 11047 Santa Barbara Santa Cruz Island. Frye's Harbor. Comment
  RSA0063344  Pentagramma viscosa F. W. Peirson 1934-3-25 11037 Santa Barbara West of canyon at Frye's Harbor, Santa Cruz Island. Comment
  RSA79890  Solanum umbelliferum F. W. Peirson 1934-3-25 11048 Santa Barbara Santa Cruz Island. Frye's Harbor Comment
  RSA65754  Stellaria nitens F. W. Peirson 1934-3-27 11067 Santa Barbara Santa Cruz Island. Upper part of Frye Creek Basin, Fryes Harbor 518 Comment
  RSA84961  Ribes thacherianum F. W. Peirson 1934-3-28 11077 Santa Barbara Santa Cruz Island. Diablo Canyon, about 1 mile west of Frye s Harbor Comment
  UCD102438  Ribes thacherianum Frank W. Peirson 1934-3-28 s.n. Santa Barbara Santa Cruz Island, Diablo Canyon, about mile west of Fry's Harbor. Comment
  RSA90384  Lotus strigosus F. W. Peirson 1934-3-28 11076 Santa Barbara Santa Cruz Island. Diablo Canyon, about 1 mile west of 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
  CAS-BOT-BC154314  Phacelia peirsoniana Frank W. Peirson 1934-7-8 11161 Mono Summit of Sherwin Hill, along foot of rocky hill at the broad turnout space at summit of grade 1950 Comment
  JEPS56215  Eriogonum umbellatum var. chlorothamnus Frank Peirson 1934-7-8 11158 Mono Sherwin Hill 1950 Comment
  RSA65846  Eriogonum microtheca var. ambiguum F. W. Peirson 1934-7-8 11159 Mono Sherwin Hill 1951 Comment
  POM203742  Oxytheca dendroidea F. W. Peirson 1934-7-8 s.n. Mono At foot of Whisky Creek, Owens River. 2043 Comment
  SEINET3836450 Image available Eriogonum baileyi var. baileyi Frank W. Peirson 1934-7-8 Shasta Whiskey Creek Comment
  POM203899  Caltha leptosepala F. W. Peirson 1934-7-10 11173 Mono Virginia Lakes Basin, along trail above Blue Lake, at higher location they are abundant in the open. 3110 Comment
  POM203735  Kelloggia galioides F. W. Peirson 1934-7-11 s.n. Mono Virginia Lakes Basin. Hill slope along the stream from Moat Lakes. 3079 Comment
  RSA72018  Polemonium pulcherrimum F. W. Peirson 1934-7-11 11181 Mono Above Moat Lake, Virginia Lakes Basin, Sierra Nevada 3171 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
  RSA80154  Mimulus breweri F. W. Peirson 1934-7-13 11315 Mono East end of Blue Lake, Virginia Lakes Basin, East Slope of Sierra Nevada 3049 Comment
  RSA203747  Silene bernardina F. W. Peirson 1934-7-14 10769 Inyo Rock Creek Lake Basin, steep mountain slope west of Heart Lake. 3354 Comment
  RSA72046  Phlox stansburyi F. W. Peirson 1934-7-14 11225 Mono East of Blue Lake, Virginia Lakes Basin. East side of Sierra Nevada. 3018 Comment
  RSA79457  Scrophularia californica var. desertorum F. W. Peirson 1934-7-14 11226 Mono East of Blue Lake, Virginia Lakes Basin. East side of Sierra Nevada. 3018 Comment
  RSA85223  Horkelia fusca subsp. parviflora F. W. Peirson 1934-7-14 11212 Mono E of Blue Lake, Virginia Lakes basin. 3018 Comment
  RSA93867  Dugaldia hoopesii F. W. Peirson 1934-7-14 11211 Mono East of Blue Lake, Virginia Lakes Basin. East slope of Sierra Nevada. 3018 Comment
  CAS-BOT-BC13957  Boechera lemmonii Frank W. Peirson 1934-7-15 11331 Mono Virginia Lakes Basin. In the cirque above Red Lake. 3230 Comment
  SEINET210457  Claytonia nevadensis F. W. Peirson 1934-7-15 11231 Mono Virginia Lakes Basin Sierra Nevada 3170 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
  RSA91644  Carex vernacula F. W. Peirson 1934-7-15 11228 Mono Along Red Lake stream, Virginia Lakes Basin. 3171 Comment
  UC638463  Potentilla flabellifolia Frank W. Peirson 1934-7-15 11230 Mono along stream flowing into Red Lake Viginia Lakes Basin, stream flowing into Red Lake 3169 Comment
  POM203734  Eriogonum microtheca var. alpinum F. W. Peirson 1934-7-16 s.n. Mono Virginia Lakes Basin, near the Virginia Lakes Resort. 2988 Comment
  JEPS61448  Geranium richardsonii Frank W. Peirson 1934-7-16 11239 Mono Blue Lake Virginia Lakes Basin Comment
  POM203733  Mentzelia congesta F. W. Peirson 1934-7-16 11248 Mono Virginia Lakes Basin. 2988 Comment
  RSA0029562  Geranium richardsonii F. W. Peirson 1934-7-16 11239 Mono On north or northwest shore of Blue Lake, Virginia Lakes Basin. 3018 Comment
  RSA92688  Eriophyllum lanatum var. integrifolium F. W. Peirson 1934-7-16 11255 Mono Moraine near Virginia Lakes Resort, Virginia Lakes Basin, Sierra Nevada 2988 Comment
  RSA93171  Machaeranthera canescens var. canescens F. W. Peirson 1934-7-16 11246 Mono Moraine near Virginia Lakes Resort, Virginia Lakes Basin, Sierra Nevada 2988 Comment
  RSA94881  Arnica mollis F. W. Peirson 1934-7-16 11254 Mono Moraine near Virginia Lakes Resort, Virginia Lakes Basin, Sierra Nevada 2988 Comment
  RSA91830  Calamagrostis muiriana F. W. Peirson 1934-7-20 12617 Inyo At Ruby Falls, Rock Creek Lake Basin, northern Inyo County. 3323 Comment
  RSA66251  Arabis lemmonii var. lemmonii F. W. Peirson 1934-7-21 11296 Inyo Rock Creek Lake Basin; Cirque on east side of canyon 3445 Comment
  RSA66499  Arabis lyallii F. W. Peirson 1934-7-21 11295 Inyo Rock Creek Lake Basin. 3445 Comment
  SEINET7552947 Image available Carex breweri Frank W. Peirson 1934-7-21 11395 Inyo Rock Creek Lake Basin. 3475 Comment
  CAS-BOT-BC34114  Carex breweri Frank W. Peirson 1934-7-22 s.n. Inyo Rock Creek Lake Basin. 3383 Comment
  POM203876  Phacelia frigida subsp. dasyphylla F. W. Peirson 1934-7-22 s.n. Inyo Upper Glacial Lake, Rock Creek Lake Basin, northern Inyo County. 3384 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-BC31884  Carex microptera Frank W. Peirson 1934-7-23 11401 Inyo Heart Lake Meadow, RockCreek Lake Basin. 3215 Comment
  POM203750  Gentianella tenella F. W. Peirson 1934-7-23 9482 Inyo Heart Lake Meadow, Rock Creek Lake Basin. 3216 Comment
  CAS-BOT-BC20931  Carex heteroneura Frank W. Peirson 1934-7-23 s.n. Inyo Rock Creek Lake Basin. In Hear Lake Meadow. 3215 Comment
  RSA88729  Carex aquatilis F. W. Peirson 1934-7-23 s.n. Inyo Rock Creek Lake Basin 3232 Comment
  UCD50947  Achnatherum occidentale F. W. Peirson 1934-7-24 s.n. Inyo Rock Creek Lake Basin. 3352 Comment
  SEINET7571410 Image available Carex phaeocephala Frank W. Peirson 1934-7-24 s.n. Inyo Rock Creek Lake Basin. 3353 Comment
  POM203754  Symphoricarpos vaccinioides F. W. Peirson 1934-7-25 s.n. Inyo Rock Creek Lake Basin. Foot of escarpment at Heart Lake. 3232 Comment
  RSA69766  Luzula spicata F. W. Peirson 1934-7-25 11283 Inyo North of Chickenfoot Lake, Rock Creek Lake Basin. 3277 Comment
  RSA70578  Sisyrinchium idahoense Frank W. Peirson 1934-7-25 11282 Inyo West side of Long Lake, Rock Creek Lake Basin. 3277 Comment
  RSA88667  Carex jonesii F. W. Peirson 1934-7-25 11307 Inyo Heart Lake Meadow, Rock Creek Lake Basin 3216 Comment
  CAS-BOT-BC118690  Carex proposita Frank Warrington Peirson 1934-7-27 s.n. Inyo Rock Creek Lake Basin. Gravel slope above Mono Pass. 3779 Comment
  JEPS63781  Trichophorum clementis F. W. Peirson 1934-7-27 11300 Inyo Heart Lake Mdw Rock Creek Lake Basin, Heart Lake Mdw 3215 Comment
  UC638458  Ivesia muirii Frank W. Peirson 1934-7-27 Inyo gorge below Mono Pass; Rock Creek Lake Basin 3596 Comment
  UCD90955  Poa cusickii subsp. epilis F. W. Peirson 1934-7-27 s.n. Inyo Rock Creek Lake Basin. Borders of Heart Lake Meadow. 3230 Comment
  JEPS55566  Hackelia micrantha F. W. Peirson 1934-7-29 Inyo Ruby Lake; Rock Creek Lake Basin 3505 Comment
  POM212912  Minuartia californica Mabel Peirson 1935-3-16 11407 Kern North side of Tehachapi Range, along the Arvin cut-off. 457 Comment
  RSA53113  Caulanthus cooperi F. W. Peirson 1935-3-16 11408 Kern South slope of Tehachapi Range and 4 miles north of Mojave Comment
  RSA94825  Cnicus benedictus F. W. Peirson 1935-3-31 11457 Los Angeles Mendocino Street and Holliston Ave, Altadena Comment
  RSA466515  Cistanthe ambigua F. W. Peirson 1935-4-15 11458 Imperial 4 miles north of Laguna Dam. Comment
  SD87782  Achyronychia cooperi Frank W. Peirson 1935-4-15 11459 Imperial 4 miles north of the Laguna Dam Comment
  RSA80730  Nicotiana obtusifolia F. W. Peirson 1935-4-16 11462 Imperial North of the bridge over the canal at Laguna Dam Comment
  RSA93354  Machaeranthera asteroides F. W. Peirson 1935-4-17 11471 Riverside Eastern part of Blythe, colorado Desert, Comment
  JEPS5094  Asclepias albicans Frank W. Peirson 1935-4-18 11503 San Bernardino n part of Range near the road going down into Copper Basin; Whipple Mts. 457 Comment
  POM212926  Plagiobothrys jonesii F. W. Peirson 1935-4-18 11495 San Bernardino Whipple Mountains. Summit of main ridge N of Copper Basin. 686 Comment
  RSA84451  Anemone tuberosa F. W. Peirson 1935-4-18 11502 San Bernardino Copper Basin, Whipple Mts., eastern San Bernardino Co. 457 Comment
  UC570589  Logfia filaginoides Frank W. Peirson 1935-4-18 11480 San Bernardino a mi or 2 up the canyon Copper Creek Basin; Whipple Mountains, Copper Creek Basin Comment
  UC570604  Anemone tuberosa Frank W. Peirson 1935-4-18 11502 San Bernardino n. part of Range near rd. going down into Copper Basin; Whipple Mts. 457 Comment
  RSA694466  Mirabilis laevis var. villosa F. W. Peirson 1935-4-18 11487 San Bernardino Whipple Mountains: northern part of Whipple Mts. 427 Comment
  RSA65682  Lewisia rediviva F. W. Peirson 1935-7-16 11515 Inyo At foot of Ruby Lake, Rock Creek Lake Basin 3399 Comment
  RSA69260  Kalmia polifolia subsp. microphylla F. W. Peirson 1935-7-17 11522 Inyo Meadows along upper end of Chickenfoot Lake, Rock Creek Lake Basin, Sierra Nevada 3293 Comment
  CAS-BOT-BC20227  Carex filifolia var. erostrata F. W. Peirson 1935-7-17 11705 Inyo Rock Creek Basin. Along edge of Heart Lake Meadow. 3215 Comment
  RSA0066486  Phlox caespitosa F. W. Peirson 1935-7-17 11519 Inyo Shores of Long Lake, Rock Creek Lake Basin; Sierra Nevada. 3262 Comment
  CAS-BOT-BC20252  Carex filifolia var. erostrata F. W. Peirson 1935-7-18 11706 Mono Slate Creek. 3048 Comment
  JEPS56854  Eriogonum incanum Frank W. Peirson 1935-7-18 11524 Mono 1/2 mi above, in stream bottom site of the old saw mill; Slate Creek 3048 Comment
  RSA0084035  Potentilla Frank W. Peirson 1935-7-18 s.n. Mono Slate Creek. 3109 Comment
  RSA378073  Triteleia ixioides subsp. scabra F. W. Peirson 1935-7-18 s.n. Mono Near site of old saw mill; Slate Creek. 3018 Comment
  RSA80799  Pedicularis groenlandica subsp. surrecta F. W. Peirson 1935-7-18 11527 Mono Mono County: wet places at old Saw Mill Camp, Slate Creek. 3018 Comment
  UC570578  Juncus chlorocephalus Frank W. Peirson 1935-7-18 11525 Mono Old Saw Mill auto camp Slate Creek 3017 Comment
  SEINET180129 Image available Muhlenbergia montana Frank W. Peirson 1935-7-19 11535 Mariposa Lake Tenaya north of lake. 2499 Comment
  RSA92238  Madia minima F. W. Peirson 1935-7-19 s.n. Mariposa Glaciated region north of Lake Tenaya, Sierra Nevada. 2500 Comment
  JEPS69506  Gilia capillaris Frank W. Peirson 1935-7-23 11544 Calaveras Big Mdw , Big Mdw (North Fork Stanislaus River) 1981 Comment
  SEINET180134 Image available Danthonia americana Frank W. Peirson 1935-7-23 11553 Calaveras Auto Campgrounds Big Meadow N. Fork Stanislaus River Region. 1981 Comment
  UC570537  Eucephalus breweri Frank W. Peirson 1935-7-23 Calaveras Big Meadow, near Auto Camp North Fork Stanislaus River Region 1981 Comment
  UC570559  Navarretia leptalea subsp. leptalea Frank W. Peirson 1935-7-23 11543 Calaveras Big Meadow N Fork Stanislaus River Region, Big Meadow 1981 Comment
  POM212936  Plagiobothrys hispidulus F. W. Peirson 1935-7-23 11546 Calaveras Big Meadow, N. Fork Stanislaus River Region, in Auto Camp grounds. 1982 Comment
  CAS-BOT-BC22078  Carex heteroneura Frank W. Peirson 1935-7-24 11711 Alpine Lake Alpine. 2225 Comment
  CAS-BOT-BC28174  Carex hoodii Frank W. Peirson 1935-7-24 11710 Alpine Lake Alpine. Comment
  RSA26684  Elymus glaucus F. W. Peirson 1935-7-24 11561 Alpine open woods near Lake Alpine, Sierra Nevada 2226 Comment
  RSA75999  Nemophila spatulata F. W. Peirson 1935-7-24 11568 Alpine North of Lake Alpine, Sierra Nevada. 2287 Comment
  RSA77055  Hydrophyllum occidentale F. W. Peirson 1935-7-24 11572 Alpine North of Lake Alpine, Sierra Nevada. 2287 Comment
  RSA91629  Carex vesicaria F. W. Peirson 1935-7-24 11708 Alpine Margins of Lake Alpine. 2226 Comment
  RSA92844  Madia glomerata F. W. Peirson 1935-7-24 11571 Alpine North of Lake Alpine, Sierra Nevada. 2287 Comment
  UC570535  Trifolium cyathiferum Frank W. Peirson 1935-7-25 11577 Alpine Lake Alpine region 2438 Comment
  UC570598  Ribes lasianthum Frank W. Peirson 1935-7-25 11575 Alpine Lake Alpine Region 2438 Comment
  RSA91184  Lupinus arbustus subsp. silvicola F. W. Peirson 1935-7-25 11579 Alpine Lake Alpine Region. 2439 Comment
  RSA91458  Trifolium cyathiferum F. W. Peirson 1935-7-25 11577 Alpine Lake Alpine Region. 2439 Comment
  UC570532  Cryptantha affinis Frank W. Peirson 1935-7-26 11596 Alpine n slope above Mokelumne River; Hemit Valley 2438 Comment
  UC570540  Bolandra californica Frank W. Peirson 1935-7-26 11594 Alpine n slope above Mokelumne River (near small streamlet); Hermit Valley 2438 Comment
  RSA66146  Draba densifolia F. W. Peirson 1935-7-26 11597 Alpine Hermit Valley, North Fork of Mokelumne River. 2591 Comment
  RSA90617  Stenotus acaulis F. W. Peirson 1935-7-26 11598 Alpine S of N Fork of Mokelumne River (Hermit Valley). 2591 Comment
  CAS-BOT-BC223127  Galium hypotrichium subsp. ebbettsense Frank W. Peirson 1935-7-27 11604 Alpine Summit region south of Ebbets Pass 2804 Comment
  GH404012  Cryptantha humilis F. W. Peirson 1935-7-27 11599 Unknown Summit region south of Ebbets Pass 2804 Comment
  RSA66730  Galium hypotrichium subsp. ebbettsense F. W. Peirson 1935-7-27 11605 Alpine Summit region S of Ebbet's Pass. Sierra Nevada. 2805 Comment
  RSA80858  Orthocarpus cuspidatus subsp. copelandii F. W. Peirson 1935-7-27 11601 Alpine Summit region S of Ebbet's Pass. Sierra Nevada. 2805 Comment
  CAS-BOT-BC20614  Carex douglasii Frank W. Peirson 1935-7-28 11719 Alpine Red Lake. 2407 Comment
  SEINET180126 Image available Bromus carinatus var. marginatus Frank W. Peirson 1935-7-28 11615 Alpine Red Lake 2408 Comment
  UC570560  Linanthus ciliatus Frank W. Peirson 1935-7-28 11612 Alpine Red Lake 2407 Comment
  CAS-BOT-BC119752  Carex nebrascensis Frank Warrington Peirson 1935-7-28 11717 Alpine Red Lake; Lake margin above the embankment at foot of lake. 2407 Comment
  POM257987  Carex whitneyi F. W. Peirson 1935-7-28 11735 Alpine At foot of Red Lake. 2409 Comment
  POM85225  Horkelia fusca subsp. parviflora F. W. Peirson 1935-7-28 11619 Alpine Lake margin at embankment at foot of Red Lake. 2409 Comment
  CAS-BOT-BC34452  Carex deflexa var. boottii Frank W. Peirson 1935-7-29 11721 Alpine Wood Lake. 2560 Comment
  RSA435665  Floerkea proserpinacoides F. W. Peirson 1935-7-29 11624 Alpine Not far from W base of Elephant s Back. Woods Lake Region. 2820 Comment
  SD87650  Floerkea proserpinacoides Frank W. Peirson 1935-7-29 11624 Alpine Not far from west base of Elephants Back. Woods Lake Region. 2819 Comment
  CAS-BOT-BC31568  Carex luzulifolia Frank W. Peirson 1935-7-30 11723 Alpine Woods Lake Region. 2743 Comment
  SD87854  Polemonium pulcherrimum Frank W. Peirson 1935-7-30 11639 Alpine Woods Lake Region. 2865 Comment
  RSA66593  Phoenicaulis cheiranthoides F. W. Peirson 1935-7-30 11637 Alpine Near small un-named lake just below the 9500 ft contour; Woods Lake Region. Comment
  RSA91043  Carex phaeocephala F. W. Peirson 1935-7-30 11722 Alpine Northwest of Roundtop, Woods Lake region. 2805 Comment
  RSA94529  Raillardella argentea F. W. Peirson 1935-7-30 11632 Alpine Northwest of Roundtop, Woods Lake region. 2805 Comment
  RSA86690  Leymus triticoides F. W. Peirson 1935-8-2 11646 El Dorado a few feet above Lake Tahoe at State Line 1905 Comment
  SEINET180128 Image available Leymus triticoides F. W. Peirson 1935-8-2 11646 El Dorado State Line Lake Tahoe 1905 Comment
  RSA74861  Phacelia hastata subsp. compacta F. W. Peirson 1935-8-2 11643 El Dorado A few feet above Lake Tahoe. 1905 Comment
  RSA91743  Muhlenbergia richardsonis F. W. Peirson 1935-8-2 11644 El Dorado Near State Line, Lake Tahoe 1905 Comment
  RSA93948  Artemisia dracunculus F. W. Peirson 1935-8-2 11645 El Dorado Open flat back lot at State Line, Lake Tahoe 1905 Comment
  CAS-BOT-BC119804  Carex nebrascensis Frank Warrington Peirson 1935-8-4 11728 Mono Sonora Pass Region, ca. 2 mi SE of Pass. Comment
  CAS-BOT-BC251492  Castilleja lemmonii F. W. Peirson 1935-8-4 11658 Mono in large boggy meadow, along east slope of main range about 1.5 mi. south of Sonora Pass 2834 Comment
  RSA69534  Maianthemum stellatum Frank W. Peirson 1935-8-4 11651 Mono Sonora Pass region 2622 Comment
  RSA82275  Castilleja lemmonii F. W. Peirson 1935-8-4 11658 Mono Along east slope of main range, ca. 1.5 miles east of Sonora Pass, Sierra Nevada. 2835 Comment
  RSA86720  Aristida adscensionis var. modesta F. W. Peirson 1936-4-16 11463 Imperial 4-S Pass northeast of Ogilby. Comment
  RSA77757  Viola lobata F. W. Peirson 1936-5-30 11823 Tulare Balch Park, Sierra Nevada. 1921 Comment
  CAS-BOT-BC515673  Prosartes hookeri Frank W. Peirson 1936-5-30 11824 Tulare Balch Park 1920 Comment
  RSA68802  Delphinium patens F. W. Peirson 1936-5-30 11825 Tulare Oak wooads, Balch Park. 1921 Comment
  JEPS62813  Satureja mimuloides Frank W. Peirson 1936-7-13 11828 Monterey Nacimiento Creek (branch of San Antonio River) 518 Comment
  RSA289934  Monardella villosa subsp. obispoensis F. W. Peirson 1936-7-13 11829 Monterey Nacimiento Creek, a branch of San Antonio River 518 Comment
  RSA87463  Agrostis pallens F. W. Peirson 1936-7-16 11998 Del Norte Smith River, near sea level. Comment
  POM78541  Carex subnigricans F. W. Peirson 1936-7-17 13596 Inyo Heart Lake Meadow, Rock Creek Lake Basin. Comment
  POM231933  Bromus arenarius F. W. Peirson 1937-5-30 12079 Kern Ca. 2 miles above White Oak Lodge, Cottonwood Creek, Tahachapi Mountains. 1677 Comment
  RSA84359  Boykinia occidentalis F. W. Peirson 1937-7-19 12086 Monterey Big Sur River. Comment
  JEPS16588  Heuchera micrantha var. diversifolia Frank W. Peirson 1937-7-19 12096 Monterey Pine Ridge trail from public camp grounds Big Sur River 304 Comment
  CAS-BOT-BC32179  Carex multicostata Frank Warrington Peirson 1937-7-22 13563 Alpine Woods Lake, Sierra Nevada. 2560 Comment
  POM231942  Silene douglasii F. W. Peirson 1937-7-22 s.n. Alpine Woods Lake Region; near Fourth of July Lake. 2896 Comment
  RSA80065  Veronica cusickii F. W. Peirson 1937-7-23 12100 Alpine Along western edge of plateau southwest of Woods Lake 2805 Comment
  RSA87467  Lupinus meionanthus F. W. Peirson 1937-7-23 12101 Alpine Northwest of Woods Lake. Comment
  RSA70228  Allium bisceptrum F. W. Peirson 1937-7-24 12113 Alpine Along trail to Winnemucca Lake, in rather open terrain, Woods Lake Region. 2683 Comment
  RSA85939  Selaginella watsonii Frank W. Peirson 1937-7-24 12116 Alpine Near Woods Lake, Sierra Nevada. 2561 Comment
  SEINET8351279  Festuca viridula Frank W. Peirson 1937-7-24 12219 Unknown Woods Lake; shores of Winnemuca Lake. 2743 Comment
  JEPS27462  Cerastium beeringianum var. capillare Frank W. Peirson 1937-7-25 12120 Alpine short distance w. Fourth of July Lake; Woods Lake Region 2895 Comment
  RSA69652  Spiranthes romanzoffiana Frank W. Peirson 1937-7-28 12135 El Dorado Back of the Memler property near Richardsons; Lake Tahoe. 1905 Comment
  RSA69484  Luzula comosa F. W. Peirson 1937-7-30 12140 Mono Mill Creek (Lundy Canyon). 2470 Comment
  RSA85708  Potentilla diversifolia var. diversifolia F. W. Peirson 1937-7-30 12151 Mono Lundy Canyon, Mill creek. 2591 Comment
  RSA0022024  Ribes montigenum F. W. Peirson 1937-7-30 12146 Mono Broken country above the falls, Mill Creek (Lundy Canyon). 2515 Comment
  JEPS40841  Symphyotrichum campestre Frank W. Peirson 1937-8-1 12156 Mono Long Valley Hot Creek Region; , Hot Creek Region 2103 Comment
  RSA65233  Eriogonum ampullaceum F. W. Peirson 1937-8-1 12155 Mono Long Valley, Hot Creek region. 2104 Comment
  RSA88856  Carex praegracilis F. W. Peirson 1937-8-1 12207 Mono Long Valley, Hot Creek region. 2104 Comment
  RSA91845  Spartina gracilis F. W. Peirson 1937-8-1 12223 Mono Long Valley, Hot Creek Basin 2104 Comment
  RSA93154  Aster campestris F. W. Peirson 1937-8-1 12156 Mono Long Valley, Hot Creek region. 2104 Comment
  RSA66550  Draba breweri F. W. Peirson 1937-8-3 12173 Inyo along E shore of Long Lake, Rock Creek Lake Basin 3262 Comment
  RSA78528  Carex subnigricans F. W. Peirson 1937-8-3 13584 Inyo Above Long Lake, Rock Creek Lake Basin. Comment
  SD87877  Stipa occidentalis var. occidentalis Frank W. Peirson 1937-8-4 Inyo Rock Creek Lake Basin. Dry borders of Heart Lake Meadow. 3215 Comment
  UC1026426  Carex filifolia var. erostrata F. W. Peirson 1937-8-4 13593 Inyo Escarpment at Heart Lake Rock Creek Basin 3230 Comment
  CAS-BOT-BC429020  Micranthes nidifica F. W. Peirson 1937-8-5 12179 Inyo West of Long Lake, Rock Creek Lake Basin 3276 Comment
  POM231950  Cistanthe rosea F. W. Peirson 1937-8-5 11269 Inyo Rock Creek Lake Basin. 3201 Comment
  UC643213  Ericameria discoidea Frank W. Peirson 1937-8-6 Inyo e side of canyon on the rocky s slope of the Transverse Ridge Rock Creek Lake Basin, Transverse Ridge 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
  JEPS27458  Boechera retrofracta Frank W. Peirson 1937-8-6 12183 Inyo Box Lake Rock Creek Lake Basin 3215 Comment
  RSA86639  Geum macrophyllum F. W. Peirson 1937-8-6 12185 Inyo East side of Rock Creek Lake basin. 3293 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
  SEINET202660  Calyptridium umbellatum F. W. Peirson 1937-8-9 Inyo Above Mono Pass Rock Cr Lake Basin 3673 Comment
  JEPS16589  Luzula parviflora Frank W. Peirson 1937-8-10 Inyo along stream tributary to Ruby Creek (below Falls); Rock Creek Lake Basin, tributary to Ruby Creek 3322 Comment
  RSA70003  Tidestromia oblongifolia F. W. Peirson 1937-11-27 12319 Riverside La Quinta, Coachella Valley. At sea-level. 0 Comment
  RSA65917  Polygonum ramosissimum F. W. Peirson 1938-4-10 12379 Riverside 1-2 miles west of Blythe. Comment
  RSA87008  Myrica californica F. W. Peirson 1938-4-13 12385 Santa Barbara 0.5 miles up stream on Bear Creek, about 2 miles south of Surf. Comment
  RSA0025031  Ribes divaricatum var. pubiflorum F. W. Peirson 1938-4-13 12384 Santa Barbara 0.5 miles up stream on Bear Creek, about 2 miles south of Surf. Comment
  RSA73057  Leptosiphon lemmonii F. W. Peirson 1938-5-30 12414 Riverside Thomas Mountain, Hemet Valley. 1402 Comment
  RSA0017275  Gilia ochroleuca subsp. exilis F. W. Peirson 1938-5-30 12413 Riverside Thomas Mountain, Hemet Valley. 1402 Comment
  UC908992  Saltugilia splendens subsp. grantii Frank W. Peirson 1938-6-2 7933 Los Angeles South Fork Rock Cr San Gabriel Mts., S Fork Rock Cr 1981 Comment
  JEPS48928  Calyptridium roseum Frank W. Peirson 1938-7-8 12433 Mono Hot Creek Region; near the gorge 2194 Comment
  RSA77039  Malacothamnus orbiculatus F. W. Peirson 1938-7-8 12416 Inyo on flats along Lone Pine Creek, west of Alabama Hills 1524 Comment
  RSA86687  Leymus triticoides F. W. Peirson 1938-7-8 12415 Inyo Near bank of Lone Pine Creek, west of Alabama Hills. Comment
  JEPS1427  Nama densa Frank W. Peirson 1938-7-8 12421 Mono Sherwin Hill , Sherwin Hill (Sherwin Grade) 1889 Comment
  RSA65404  Cistanthe rosea F. W. Peirson 1938-7-8 12433 Mono Near the Hot creek Gorge, Ownes Valley 2195 Comment
  RSA75533  Phacelia bicolor F. W. Peirson 1938-7-8 s.n. Mono Crooked Creek 2073 Comment
  RSA80430  Antirrhinum kingii F. W. Peirson 1938-7-8 12425 Inyo Sherwin Grade, north of Bishop. 1890 Comment
  UC599223  Monolepis nuttalliana Frank W. Peirson 1938-7-8 12440 Mono near the windmill in low valley between hills Hot Creek Comment
  UC599227  Phlox stansburyi Frank W. Peirson 1938-7-8 12429 Mono between the Boulevard in the vicinity of Whisky Creek and the Owens River; Whisky Creek 2072 Comment
  UC599225  Mimulus nanus var. mephiticus Frank W. Peirson 1938-7-9 12445 Mono e base Mono Craters 2133 Comment
  RSA72298  Aliciella monoensis F. W. Peirson 1938-7-9 12615 Mono 19 miles northwest of Benton 2165 Comment
  RSA94934  Tetradymia glabrata F. W. Peirson 1938-7-9 12448 Mono About 19 miless W or NW of Benton. 2073 Comment
  UC599191  Gilia subacaulis Frank W. Peirson 1938-7-9 12615 Mono 19 mi w or nw Benton; nw of Benton 2164 Comment
  UC599222  Abronia turbinata Frank W. Peirson 1938-7-9 12443 Mono At east base of Mono Craters Mono Craters Comment
  CAS-BOT-BC226903  Loeseliastrum depressum Frank W. Peirson 1938-7-10 12462 Mono West slope White Mountains. Directly below the Devernois Ranch 1432 Comment
  RSA0006788  Astragalus lentiginosus var. fremontii F. W. Peirson 1938-7-10 12458 Mono Below the old Devernois Ranch, west slope of White Mountains. 1463 Comment
  UC640213  Ericameria paniculata Frank W. Peirson 1938-11-12 12638 San Diego just above The Narrows; San Felipe Canyon Comment
  UC643217  Sphaeromeria cana Frank W. Peirson 1939-8-3 Inyo w Long Lake; Rock Creek Lake Basin 3261 Comment
  RSA94586  Achillea millefolium F. W. Peirson 1939-8-3 12770 Inyo Near south end of Long Lake, Rock Creek Lake Basin, Northern Inyo Co. 3262 Comment
  CAS-BOT-BC318400  Packera cana Frank Warrington Peirson 1939-8-5 s.n. Inyo Rock Creek Lake Basin, Along the foot of the escarpment at Heart Lake 3230 Comment
  RSA0101659  Botrychium simplex var. compositum F. W. Peirson 1939-8-6 12991 Inyo Along west shore of Ruby Lake, Rock Creek Lake Basin. 3399 Comment
  RSA97462  Perideridia parishii subsp. latifolia F. W. Peirson 1939-8-6 12888 Inyo Ruby Lake, Rock Creek Lake Basin. 3399 Comment
  UC640212  Eucephalus breweri Frank W. Peirson 1939-8-9 12786 Alpine Woods Lake 2545 Comment
  UC640231  Monardella odoratissima subsp. pallida Frank W. Peirson 1939-8-9 12791 Alpine At foot of rocks north of Woods Lake 2545 Comment
  UC640229  Valeriana californica Frank W. Peirson 1939-8-10 12797 Alpine slopes above Winnemucca Lake; Woods Lake Region 2773 Comment
  RSA90902  Carex utriculata F. W. Peirson 1939-8-10 12812 Alpine At edge of outlet of Woods Lake. 2561 Comment
  RSA93788  Aster integrifolius F. W. Peirson 1939-8-10 12796 Alpine Above Winnemucca Lake, Wood's Lake Region. 2774 Comment
  UC640244  Sparganium emersum var. emersum Frank W. Peirson 1939-8-10 12813 Alpine margin of Woods Lake 2560 Comment
  RSA84258  Parnassia palustris var. californica F. W. Peirson 1939-8-11 s.n. Alpine On northeast slope of Round Top, Woods Lake Region 2820 Comment
  POM254415  Mimulus nanus var. mephiticus F. W. Peirson 1939-8-12 12840 Alpine Woods Lake Region. Frog Lake below high water mark. 2713 Comment
  UC640217  Polygonum polygaloides subsp. kelloggii Frank W. Peirson 1939-8-12 12844 Alpine meadow s-ward from Carson Pass; Woods Lake Region 2621 Comment
  UCR142546  Gnaphalium palustre F. W. Peirson 1939-8-12 12833 Alpine Sierra Nevada Mtns., Woods Lake region; south of Carson Pass 2622 Comment
  RSA85227  Horkelia fusca subsp. parviflora F. W. Peirson 1939-8-13 12853 Alpine below Frog Lake, Woods Lake Region. 2683 Comment
  CAS-BOT-BC268650  Eriogonum spergulinum var. reddingianum Frank W. Peirson 1939-8-13 12854 Alpine About Frog Lake; Woods Lake region, Sierra Nevada 2712 Comment
  CAS-BOT-BC294540  Erigeron breweri var. breweri Frank W. Peirson 1939-8-13 12858 Alpine Woods Lake 2560 Comment
  RSA69388  Thalictrum fendleri F. W. Peirson 1939-8-13 12859 Alpine Along the south shore of Woods Lake. 2561 Comment
  RSA94941  Tetradymia canescens F. W. Peirson 1939-8-13 s.n. Alpine Frog Lake, Woods Lake Region, Sierra Nevada. Comment
  RSA97458  Osmorhiza occidentalis F. W. Peirson 1939-8-13 12852 Alpine Slope above Frog Lake, Woods Lake Region, Sierra Nevada 2744 Comment
  RSA65054  Silene invisa F. W. Peirson 1939-8-14 13001 Alpine East Fork of Woods Creek, Woods Lake region. 2622 Comment
  RSA66222  Arabis holboellii var. pinetorum F. W. Peirson 1939-8-20 12873 Fresno West side of Florence Lake. 2226 Comment
  RSA90371  Lotus nevadensis F. W. Peirson 1939-8-20 12872 Fresno West side of Florence Lake. 2226 Comment
  CAS-BOT-BC286596  Ericameria bloomeri Frank W. Peirson 1939-8-22 12884 Fresno Florence Lake 2209 Comment
  POM258117  Carex utriculata F. W. Peirson 1939-8-22 s.n. Fresno Wet location along stream in Jackass Meadow. Florence Lake region. 2180 Comment
  RSA82064  Cordylanthus tenuis F. W. Peirson 1939-8-22 12878 Fresno abundant along west shore of Florence Lake, Sierra Nevada Comment
  RSA70002  Tidestromia oblongifolia F. W. Peirson 1939-11-25 s.n. Riverside Foot of mountain near Painted Canyon. Comment
  CAS-BOT-BC349762  Monoptilon bellioides F. W. Peirson 1940-3-21 s.n. Inyo Death Valley at road junction on north side of valley Comment
  RSA82581  Stachys ajugoides F. W. Peirson 1940-4-20 s.n. San Luis Obispo Cambria Pines. Comment
  PASA779  Gilia capitata Frank W. Peirson 1940-5-14 Kern Greenhorn Range, east slope 1523 Comment
  RSA75979  Draperia systyla F. W. Peirson 1940-6-2 12932 Fresno Along road to Kings River; from canyon of South Fork of Kings River. 1067 Comment
  UC643215  Draperia systyla Frank W. Peirson 1940-6-2 12932 Fresno Canyon of South Fork Kings River 1066 Comment
  PASA1122  Scutellaria angustifolia Frank W. Peirson 1940-7-3 San Bernardino Road to Fish Hatchery south of Baldwin Lake, San Bernardino Mts. 2133 Comment
  PASA1123  Scutellaria angustifolia Frank W. Peirson 1940-7-3 San Bernardino Road to Fish Hatchery south of Baldwin Lake, San Bernardino Mts. 2133 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
  RSA66500  Arabis lyallii F. W. Peirson 1940-8-2 12973 Inyo Along bank on east side of creek a short distance below Ruby Lake, Rock Creek Lake Basin. Inyo. Comment
Read comments
May 12 2014
  RSA78491  Salix arctica F. W. Peirson 1940-8-2 13533 Inyo Below Ruby Lake, Rock Creek Lake Basin. 3506 Comment
  POM254413  Antennaria media F. W. Peirson 1940-8-2 12959 Inyo shore of Ruby Lake near outlet; Rock Creek Lake Basin, northern Inyo Co. 3399 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
  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
  CAS-BOT-BC399931  Thalictrum sparsiflorum Frank W. Peirson 1940-8-5 s.n. Inyo Margin of lake on east side of canyon and at base of Transverse Ridge; Rock Creek Lake Basin, Sierra Nevada 3261 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
  CAS-BOT-BC13874  Boechera inyoensis Frank W. Peirson 1940-8-6 12975 Inyo Rock Creek Lake Basin. Mountain slope west of Heart Lake. 3291 Comment
  CAS-BOT-BC13875  Boechera inyoensis Frank W. Peirson 1940-8-6 12975 Inyo Rock Creek Lake Basin. 3291 Comment
  POM256929  Achnatherum occidentale subsp. occidentale F. W. Peirson 1940-8-6 12940 Inyo Rock Creek Lake Basin 3323 Comment
  UC643231  Montia chamissoi Frank W. Peirson 1940-8-6 Inyo w of Heart Lake (Rock Creek Lake Basin); Rock Creek Lake Basin 3291 Comment
  RSA91664  Trisetum spicatum F. W. Peirson 1940-8-6 12941 Inyo Heart Lake Meadow, Rock Creek Lake Basin 3201 Comment
  POM254414  Antennaria pulchella F. W. Peirson 1940-8-9 12957 Inyo Above upper lake on east side of Rock Creek Lake Basin. 3293 Comment
  UC643229  Hulsea algida Frank W. Peirson 1940-8-9 Inyo on e side of canyon Rock Creek Lake Basin 3307 Comment
  POM256928  Calamagrostis canadensis F. W. Peirson 1940-8-13 12943 Inyo Rock Creek Lake Basin above Heart Lake Meadow 3232 Comment
  CAS-BOT-BC333029  Senecio scorzonella Frank W. Peirson 1940-8-14 12982 Inyo Box Lake, Rock Creek Lake Basin 3230 Comment
  UC698469  Eleocharis suksdorfiana Frank W. Peirson 1940-8-17 Inyo Heart Lake Meadow Rock Creek Lake Basin 3200 Comment
  RSA91045  Carex subfusca F. W. Peirson 1940-8-17 13022 Inyo Heart Lake Meadow, Rock Creek Lake Basin. 3201 Comment
  RSA91847  Danthonia intermedia F. W. Peirson 1940-8-18 12935 Inyo South of Long Lake, Rock Creek Lake Basin, northern Inyo County. Alt. 10700 ft. 3262 Comment
  UC837234  Carex buxbaumii Frank W. Peirson 1940-8-19 12946 Inyo Rock Creek Lake Basin 3261 Comment
  RSA94517  Arnica mollis F. W. Peirson 1940-9-10 12999 Inyo First Glacial Lake, Rock Creek Lake basin 3384 Comment
  UC643212  Tofieldia occidentalis subsp. occidentalis Frank W. Peirson 1940-9-10 Inyo one of the small lakes above Morgan Pass; Rock Creek Lake Basin 3352 Comment
  RSA69541  Mentzelia involucrata F. W. Peirson 1941-4-8 s.n. Imperial Painted Gorge north of the San Diego to El Centro hwy. Comment
  RSA74710  Nama hispida var. revoluta F. W. Peirson 1941-4-8 s.n. Imperial 10 miles NW of Ogilby. Comment
  RSA80274  Cryptantha maritima var. pilosa F. W. Peirson 1941-4-8 13073 Imperial Road to gorge turns N from boulevard a few miles E of Mtn Springs Grade Comment
  RSA66762  Arabis pulchra F. W. Peirson 1941-4-9 13077 Riverside Open desert among shrubs; Pinto Basin road at junction with road to Cottonwood Springs. Comment
  RSA66799  Arabis glaucovalvula F. W. Peirson 1941-4-10 13078 Riverside White Tank Region at summit of grade S of 29 Palms. Comment
  RSA86754  Vulpia microstachys var. ciliata F. W. Peirson 1941-5-31 13080 Fresno Cedar Grove, Kings River; Sierra Nevada. 1402 Comment
  RSA70421  Polygala californica F. W. Peirson 1941-7-23 13086 Mendocino About 3 miles back from beach. Van Damme State Park. Comment
  RSA91983  Holcus lanatus F. W. Peirson 1941-7-23 13120 Mendocino Van Damme State Park. Near sea level. Comment
  RSA78648  Solanum umbelliferum F. W. Peirson 1943-5-15 13550 Los Angeles Rock Creek, north slope of San Gabriel Mountains. 1296 Comment
  CAS-BOT-BC141852  Potentilla anserina F. W. Peirson 1943-5-30 13552 San Bernardino Baldwin Lake, San Bernardino Mts., southern California Comment
  RSA78639  Phacelia curvipes F. W. Peirson 1946-4-20 13542 Inyo Gray s Camp. Comment
  RSA79947  Cryptantha nubigena F. W. Peirson 1950-8-9 9153 Inyo East of Heart Lake; Rock Creek Lake Basin 3430 Comment
  RSA65653  Claytonia palustris F. W. Peirson 1951-1 1860 Tulare Tule River, Sierra Nevada Comment
  RSA95062  Hemizonia australis F. W. Peirson 1951-1 1350 Los Angeles at 1085 New York Drive, Altadena. Comment
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Apr 1 2009
  RSA82224  Verbena scabra F. W. Peirson 1951-08 1039 Los Angeles Kewen Lake, Pasadena Comment
  RSA66767  Arabis divaricarpa F. W. Peirson 1956-7-24 9456 Inyo Foot of escarpment near Heart Lake, Rock Creek Lake Basin. 3232 Comment



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