Search Results — 2000 specimen records retrieved (1036 records with coordinates)
(That's the default maximum. Contact Jason Alexander for larger data requests.)

Results for search: Source=All; Collector=Peirson;   
Map/download results:

BerkeleyMapper with layers and yellow flags

Download Options:
Select all records · Select records with coordinates

Include annotations and voucher information

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

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

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

Click on column header to sort data (* sorts by family); click in leftmost checkbox to select record. CCH Help Page.
A yellow cell in the column headed "?", for records with coordinates, indicates a discrepancy with respect to range as specified in the eFlora. Read more ...
? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  UCR142721  Camissonia claviformis subsp. peirsonii F. W. Peirson 1922-4-12 4512 Imperial Sonoran (Colorado) Desert, Twenty-eight miles south [SE] of Coachella -56 Comment
  CAS-BOT-BC128762  Whipplea modesta Frank W. Peirson 1941-7-23 s.n. Mendocino Van Damme Creek, Van Damme State Park, about 2 miles up the stream. Comment
  CAS-BOT-BC132784  Salix arctica F. W. Peirson 1933-8-21 13530 Inyo Upper Ruby Stream, Rock Creek Lake Basin Comment
  CAS-BOT-BC14899  Crepis intermedia Frank Warrington Peirson 1926-6-25 6873 Modoc Cedarville Pass, Warner Mountains Comment
  CAS-BOT-BC162668  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-BC175132  Silene verecunda Frank W. Peirson 1922-8-25 3270 San Bernardino South Fork Santa Ana River, San Bernardino Mts. Comment
  CAS-BOT-BC179188  Floerkea proserpinacoides Frank Warrington Peirson 1926-6-25 6888 Modoc Small side canyon, 1 mi. E of summit, Cedarville Rd. Comment
  CAS-BOT-BC185859  Vulpia octoflora var. hirtella F. W. Peirson 1918-5-19 1567 Los Angeles Millards Canyon, San Gabriel Mts. Comment
  CAS-BOT-BC197983  Navarretia intertexta subsp. propinqua Frank Warrington Peirson 1926-6-25 6868 Modoc Cedarville Pass, Warner Mts. Comment
  CAS-BOT-BC198169  Deschampsia danthonioides Frank W. Peirson 1922-5-19 3022 Riverside 10 mi. NE of Murietta along roadside, Menifee Valley Comment
  CAS-BOT-BC205346  Lupinus elatus F. W. Peirson; Bulletin Torrey Club 1919-6-4 2435 San Bernardino Icehouse Canon [Canyon] Comment
  CAS-BOT-BC227046  Leptosiphon floribundus subsp. glaber Frank W. Peirson 1922-4-28 946 Riverside Leach Canon [Canyon], Elsinore Region Comment
  CAS-BOT-BC243666  Justicia californica Frank W. Peirson 1928-3-24 7736 San Diego San Felipe Creek near the foot of Sentenac Canyon Comment
  CAS-BOT-BC252979  Eriogonum reniforme Frank W. Peirson 1928-4-2 7788 Inyo Near Bradbury Well, Death Valley Region Comment
  CAS-BOT-BC259447  Eriogonum luteolum Frank W. Peirson 1923-7-7 3709 Mendocino About 3 miles southeast of Boonville Comment
  CAS-BOT-BC263556  Eriogonum thomasii Frank W. Peirson 1928-4-22 7881 San Diego San Felipe Creek at the Narrows Comment
  CAS-BOT-BC263557  Eriogonum thomasii Frank W. Peirson 1928-4-22 7881 San Diego Along foot of rocky walls of the Narrows, San Felipe Creek, western edge of Colorado Desert Comment
  CAS-BOT-BC301784  Eriophyllum multicaule Frank W. Peirson 1922-4-29 2927 Riverside Road to Leach Canon [Canyon], Elsinore Comment
  CAS-BOT-BC303585  Geraea canescens Frank W. Peirson 1921-3-23 2782 Riverside 10 miles SE of Palm Springs Comment
  CAS-BOT-BC311079  Heterotheca oregona var. rudis Frank W. Peirson 1926-7-13 7051 Humboldt Mad River, vicinity of Blue Lake Comment
  CAS-BOT-BC312844  Hymenoxys lemmonii Frank W. Peirson 1932-7-20 10356 Plumas Sierra Valley, probably Plumas County. North of Loyalton Comment
  CAS-BOT-BC327848  Oreostemma peirsonii F. W. Peirson 1919-8-8 1276 Tulare Twin Lake Cirque, Mt. Whitney Region Comment
  CAS-BOT-BC330357  Lessingia tenuis Frank W. Peirson 1923-6-10 s.n. Ventura Seymour Cr., Mt. Pinos 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
  CAS-BOT-BC348003  Malacothrix sonchoides Frank W. Peirson 1922-5-14 3001 San Bernardino Mojave Desert. 8 miles north of Barstow Comment
  CAS-BOT-BC401964  Gilia ochroleuca subsp. bizonata Frank W. Peirson 1923-6-10 3582 Ventura Seymour Cr., Mt. Pinos Comment
  CAS-BOT-BC407623  Gilia ochroleuca subsp. exilis Frank W. Peirson 1938-5-30 12413 Riverside South of the Shell Gas station, Thomas Mountain, Hemet Valley Comment
  CAS-BOT-BC418708  Eschscholzia glyptosperma Frank W. Peirson 1928-4-1 7771 Inyo (Canyon floor about 4 miles below Bradbury Well.) Old Confidence Mill to Bradbury Well, Death Valley Region Comment
  CAS-BOT-BC42028  Draba albertina Frank W. Peirson 1908-7-23 653 Tulare Sierra Nevada. Sequoia National Park. Comment
  CAS-BOT-BC46323  Arctostaphylos pungens Frank W. Peirson 1929-3-30 8279 San Diego Pines Hills Lodge near Julian. Comment
  CAS-BOT-BC48095  Styrax redivivus Frank W. Peirson 1923-5-5 3493 Orange Trabuco Canyon, Santa Ana Mts. - Near canyon bottom in shade. Comment
  CAS-BOT-BC83349  Myosurus minimus Frank W. Peirson 1922-5-19 4171 Riverside Menifee Valley. Comment
  CAS-BOT-BC88077  Thelypodium brachycarpum Frank W. Peirson 1923-7-19 3736 Siskiyou Laird's Landing. Comment
  CAS-BOT-BC88116  Thelypodium laciniatum Frank W. Peirson 1923-7-19 3734 Siskiyou Laird's Landing. Comment
  GH420237  Tiquilia canescens var. pulchella F. W. Peirson 1935-4-16 Unknown 4-S Pass eastern Imperial Co. Comment
  JEPS10828  Orobanche fasciculata Frank W. Peirson 1919-6-7 465 Los Angeles San Gabriel Mountains, Cow Canyon Divide. Comment
  JEPS1174  Phacelia mohavensis Frank W. Peirson 1922-7-5 3164 Los Angeles 1 mi w Big Pines; San Gabriel Mountains, Mescal Creek region Comment
  JEPS13828  Salix lasiolepis Frank W. Peirson 1919-2-9 317 Los Angeles Fish Canyon; San Gabriel Mts., Fish Canyon Comment
Read comments
Dec 10 2014
  JEPS200  Sanicula arguta Mabel Peirson Apr 12 1927-Apr 14 1927 Santa Barbara Prisoner's Cove Santa Cruz Isl. Comment
  JEPS20270  Limonium sinuatum Frank W. Peirson 1923-3-27 3397 San Diego Imperial Beach 0 Comment
  JEPS23380  Delphinium gypsophilum Frank W. Peirson 1928-4-5 7834 Kern n slope Tehachapi Pass Comment
  JEPS27588  Gayophytum heterozygum F. W. Peirson 1918-6-30 130 Los Angeles Mt. Wilson San Gabriel Mountains (near summit) Comment
  JEPS36931  Artemisia dracunculus F. W. Peirson 1918-10-16 272 Los Angeles Pacoima Canyon San Gabriel Mts., Pacoima Canyon Comment
  JEPS37778  Quercus wislizeni Frank W. Peirson 1919-5-10 403 Los Angeles Mt. Gleason San Gabriel Mts. Comment
Read comments
Aug 21 2014
  JEPS40715  Dieteria canescens var. canescens Frank W. Peirson 1923-8-30 4008 Los Angeles Mescal Creek San Gabriel Mountains (very head) Comment
  JEPS41860  Corethrogyne filaginifolia Frank W. Peirson 1918-10-15 229 Los Angeles Summit Sister Elsie Peak; San Gabriel Mts. Comment
  JEPS44040  Epilobium canum subsp. latifolium Frank W. Peirson 1918-6-30 123 Los Angeles Trail from Mt. Lowe to Mt. Wilson. Comment
  JEPS49135  Ephedra funerea Frank W. Peirson 1928-4-2 7790 Inyo near Bradbury Well; Death Valley Region Comment
  JEPS56706  Eriogonum davidsonii Frank W. Peirson 1918-6-30 18 Los Angeles summit Mt. Wilson San Gabriel Mts., Mt. Wilson Comment
  JEPS57740  Chorizanthe spinosa Frank W. Peirson 1927-5-29 7336 Kern Red Rock Canyon Comment
  JEPS5908  Bloomeria crocea Frank Peirson 1918-6-28 6 Los Angeles foothills e. of Rubio Canyon; base s. of San Gabriel Mts. Comment
  JEPS61990  Lilium humboldtii subsp. ocellatum Frank W. Peirson 1919-7-1 515 Los Angeles Fish Canyon; San Gabriel Mountains Comment
  JEPS63300  Teucrium glandulosum Frank W. Peirson 1935-4-18 11504 San Bernardino n part Whipple Mts. Comment
  JEPS63880  Juncus mexicanus Frank W. Peirson 1920-9-17 2287 Los Angeles San Antonio Canyon San Gabriel Mountains Comment
  JEPS65123  Lupinus elatus Frank W. Peirson 1918-6-10 89 Los Angeles Summit of San Gabriel Peak San Gabriel Peak Comment
  JEPS65607  Pediomelum californicum Frank W. Peirson 1933-7-9 10686 Kern road from Caliente to Bodfish about 6 mi s Bodfish; s of Bodfish Comment
  JEPS69868  Leptodactylon pungens Frank W. Peirson 1923-7-19 3809 Siskiyou w foot Mt. Shasta (road crossing of Whitney Creek); , Whitney Creek Comment
  JEPS8725  Keckiella antirrhinoides Frank Peirson 1925-6-16 Los Angeles Pasadena Comment
  LA38974  Mimulus mohavensis Frank W. Peirson; 1922-5-14 2982 San Bernardino Half way Barstow to Victorville, River Rd Comment
  PASA1097  Lotus hamatus Frank W. Peirson 1927-4-19 San Diego Headland south of Torrey Pines Comment
  PASA1565  Nicolletia occidentalis Frank W. Peirson 1930-4-13 San Bernardino 10 miles sout of Garlic Spring, Mohave Desert Comment
  PASA1603  Meconella linearis Frank W. Peirson 1929-4-20 Santa Barbara Near Surf. Near sea level Comment
  PASA1703  Solidago occidentalis Frank W. Peirson 1921-9-21 Los Angeles Los Angeles River near Tropico Comment
Read comments
Nov 12 2014
  PASA1761  Sphaeralcea fendleri var. californica Frank W. Peirson 1922-5-13 San Bernardino Granite Wells, Mohave Desert Comment
  PASA1772  Hibiscus denudatus Frank W. Peirson 1928-3-24 San Diego Sentenac Canyon, San Felipe Creek Comment
  PASA1784  Ayenia californica Frank W. Peirson 1928-4-22 San Diego San Felipe Creek Comment
  PASA2002  Amsinckia lycopsoides Frank W. Peirson 1923-3-27 San Diego Imperial Beach Comment
  PASA2034  Lepidium dictyotum Frank W. Peirson 1925-3-23 Kings 6 miles west of Lemoore Comment
  PASA2051  Lyrocarpa coulteri Frank W. Peirson 1928-3-24 San Diego San Felipe Creek, 2 miles below Sentenac Canyon Comment
  PASA2185  Blennosperma californicum Frank W. Peirson 1926-4-2 Lake West end of Clear Lake Comment
  PASA2288  Gnaphalium bicolor Frank W. Peirson 1929-4-20 Santa Barbara Surf Comment
  PASA2533  Delphinium parryi Frank W. Peirson 1923-3-27 San Diego Imperial Beach Comment
  PASA2582  Thysanocarpus laciniatus Frank W. Peirson 1923-4-12 3446 Los Angeles Wilson's Cove, San Clemente Island Comment
  PASA2779  Lupinus breweri F. W. Peirson 1921-7-3 Y 73 Mariposa Little Yosemite Comment
  PASA2801  Salix sitchensis F. W. Peirson 1921-7-8 Y 101 Mariposa Ten Lakes Comment
  PASA2866  Ribes montigenum F. W. Peirson 1921-7-8 Y 93 Mariposa Ten Lakes Comment
  PASA2880  Sambucus racemosa F. W. Peirson 1921-7-8 Y 97 Mariposa Ten Lakes Comment
  PASA2883  Kalmia polifolia var. microphylla F. W. Peirson 1921-7-8 Y 99 Mariposa Ten Lakes Comment
  PASA410  Viguiera deltoidea var. parishii Frank W. Peirson 1925-5-17 San Diego Lower part of Vallecito Canyon, Laguna Mts. Comment
  PASA46  Galium bolanderi Frank W. Peirson 1932-7-7 Humboldt Willow Creek Comment
  PASA581  Abronia nana Frank W. Peirson 1930-7-5 San Bernardino North shore of Bear Lake, San Bernardino Mountains Comment
  PASA686  Linum micranthum Frank W. Peirson 1922-5-19 Riverside Two and one-half miles northeast of Murietta on the Menifee Valley Raod Comment
  POM171914  Brickellia oblongifolia var. linifolia F. W. Peirson 1930-8-12 s.n. Mono Mono Lake Comment
  POM175545  Viguiera laciniata F. W. Peirson 1923-3-26 3364 San Diego 4 miles south of San Onofre Comment
  POM17758  Castilleja foliolosa F. W. Peirson 1923-3-26 2890 San Diego 1/2 mile south of Torrey Pines. Comment
  POM203727  Crepis acuminata F. W. Peirson 1934-7-14 s.n. Mono East of Blue Lake; Virginia Lakes Basin Comment
  POM203880  Polemonium pulcherrimum F. W. Peirson 1934-7-11 11181 Mono Above Moat Lake [Virginia Lakes Basin, Sierra Nevada] Comment
  POM20529  Phacelia distans F. W. Peirson 1923-3-26 3384 San Diego Agua Hedionda Comment
  POM20532  Hemizonia increscens F. W. Peirson 1923-6-26 s.n. San Luis Obispo Arroyo Grande. Comment
  POM20563  Plagiobothrys bracteatus F. W. Peirson 1923-3-27 3385 San Diego 6 miles S of National City. Comment
  POM212920  Salvia mohavensis F. W. Peirson 1935-4-18 11496 San Bernardino Whipple Mountains: In a valley in the north part of the range not far from the road going down into Copper Basin. Comment
  POM47646  Astragalus lentiginosus var. sierrae F. W. Peirson 1924-5-15 4558 San Bernardino North end of Baldwin Lake, San Bernardino Mts. Comment
  POM48463  Dudleya edulis F. W. Peirson 1924-5-31 4674 Orange 5 miles southeast of Laguna Beach. Comment
  POM8239  Hoffmannseggia glauca F. W. Peirson 1922-8-15 s.n. Los Angeles Coyote Pass, Los Angeles. Comment
  POM87143  Holcus lanatus F. W. Peirson 1925-8-10 6369 Mendocino Jug Handle Creek. Comment
  POM89889  Erythronium californicum Frank W. Peirson 1926-4-2 6574 Lake Grade down to Clear Lake, Hopland Road. Comment
  RSA0017272  Gilia ochroleuca subsp. exilis F. W. Peirson 1919-4-15 921 Riverside Whitewater Grade above Cabazon, San Gorgonio Pass. Comment
  RSA100194  Lonicera hispidula var. vacillans F. W. Peirson 1918-6-15 264 Los Angeles Mint Canyon at northwest corner of San Gabriel Mts. Comment
  RSA100202  Lonicera involucrata var. ledebourii F. W. Peirson 1925-8-10 6381 Mendocino Jug Handle Creek 6 miles north of Mendocino City. Comment
  RSA212880  Camissonia campestris subsp. campestris F. W. Peirson 1935-3-16 s.n. Kern Mojave Desert, 1-2 miles N of the Grapevine Grade. Comment
  RSA414752  Oxytropis oreophila F. W. Peirson 1922-8-28 s.n. San Bernardino Summit of San Gorgonio Peak Comment
  RSA435956  Lyrocarpa coulteri var. palmeri F. W. Peirson 1928-3-24 7749 San Diego San Felipe Creek, 2 miles below Sentenac Canyon, eastern SD county. Comment
  RSA451826  Petrophytum caespitosum F. W. Peirson 1920-7-1 3399 Tulare Big Arroyo. Comment
  RSA568517  Gentiana fremontii F. W. Peirson 1920-07 3416 San Bernardino Upper Santa Ana River Comment
  RSA64583  Eriogonum pusillum F. W. Peirson 1928-4-24 7912 Riverside Below Cottonwood Spring, northern edge of Colorado Desert. Comment
  RSA64614  Eriogonum sphaerocephalum var. halimioides F. W. Peirson 1926-7-25 6859 Modoc Cedarville Rd. west slope of Warner Mts. Comment
  RSA64699  Eriogonum thomasii F. W. Peirson 1916-7-9 s.n. San Bernardino Mojave Desert, near Victorville. Comment
  RSA65001  Nemacaulis denudata var. denudata F. W. Peirson 1951-8-18 1781 Los Angeles Alamitos, Long Beach 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
  RSA65200  Chorizanthe brevicornu var. brevicornu F. W. Peirson 1920-2-16 1775 Riverside East of Palm Springs. Comment
  RSA65261  Mucronea perfoliata F. W. Peirson 1917-5-3 1773 San Bernardino Mojave Desert. Comment
  RSA65347  Atriplex watsonii F. W. Peirson 1923-3-27 3413 San Diego Imperial Beach. Comment
  RSA65349  Atriplex elegans var. fasciculata F. W. Peirson 1927-4-26 7207 Imperial 2 miles below foot of Mtn Springs Grade Comment
  RSA65352  Atriplex californica F. W. Peirson 1924-2-10 4534 Orange Corona Del Mar Comment
  RSA65358  Atriplex canescens F. W. Peirson 1924-8-29 4528 Orange Corona Del Mar Comment
  RSA65386  Atriplex rosea F. W. Peirson 1920-6-22 s.n. Los Angeles Bassett, near El Monte Comment
  RSA65391  Atriplex hymenelytra F. W. Peirson 1930-3-29 8694 Riverside Painted Canyon, near Mecca, Colorado Desert. Comment
  RSA65581  Spergularia platensis F. W. Peirson 1866 Los Angeles Long Beach Comment
  RSA65623  Opuntia ramosissima F. W. Peirson 1928-4-24 7906 Riverside Below Cottonwood Springs, Eagle Mountains. Northern Colorado Desert. Comment
  RSA65626  Elatine brachysperma F. W. Peirson, W. L. Jepson 1927-4-19 7242 San Diego Headland south of Torrey Pines, Comment
  RSA65716  Loeflingia squarrosa F. W. Peirson 1922-4-9 4156 Riverside Palm Canyon Region, near Palm Springs. Comment
  RSA65723  Claytonia rubra subsp. rubra F. W. Peirson 1951-1 s.n. San Bernardino Bear Valley. Comment
  RSA65743  Sesuvium verrucosum F. W. Peirson 1918-04 1856 Imperial Salton Sea. Comment
Read comments
Nov 18 2014
  RSA65787  Cleomella obtusifolia F. W. Peirson 1922-5-14 3004 San Bernardino 8 miles north of Barstow. Comment
  RSA65789  Cleomella obtusifolia F. W. Peirson 1924-5-14 4576 San Bernardino 21 miles east of Victorville. Comment
  RSA65854  Polygonum paronychia F. W. Peirson 1912-6-27 1794 Monterey Monterey. Comment
  RSA65898  Chorizanthe uniaristata F. W. Peirson 1933-7-9 10684 Kern 1/2 north of the Walker Basin on road from Caliente to Bodfish. Comment
  RSA66020  Eriogonum nudum var. auriculatum F. W. Peirson 1923-7-10 4206 Humboldt Garberville. Comment
  RSA66067  Rorippa curvisiliqua F. W. Peirson 1908-7-12 1908 Kern Lower Kern River, Sierrra Nevada. Comment
  RSA66087  Tropidocarpum gracile F. W. Peirson 1919-4-14 2811 Riverside Murray Canyon, near Palm Springs. Comment
  RSA66108  Cardamine californica var. integrifolia F. W. Peirson 1934-3-26 11058 Santa Barbara Santa Cruz Island. Frye's Harbor. Comment
  RSA66173  Draba cuneifolia var. integrifolia F. W. Peirson 1928-3-24 7751 San Diego San Felipe Creek, 2 miles below Sentenac Canyon, eastern SD county. Comment
  RSA66224  Arabis lemmonii var. depauperata F. W. Peirson 1921-8-18 2534 Inyo Taboose Pass, Sierra Nevada. Comment
  RSA66295  Canbya candida F. W. Peirson 1926-4-26 6660 Los Angeles about 6 miles west of Rock Creek, Comment
  RSA66299  Stylomecon heterophylla F. W. Peirson 1918-5-5 1889 Los Angeles along road to [Brents] on the Malibu, Santa Monica Mts. Comment
  RSA66310  Argemone munita subsp. munita F. W. Peirson 1935-4-18 11478 San Bernardino Copper basin creek, Whipple Mtns., eastern San Bernardino county Comment
  RSA66320  Polygonum lapathifolium F. W. Peirson 1920-6-22 1791 San Bernardino 2 miles south of Chino Comment
  RSA66326  Polygonum phytolaccifolium F. W. Peirson 1910-8-2 1787 Tuolumne Tamarack Flat, Yosemite National Park. Comment
Read comments
Jul 4 2012
  RSA66492  Eschscholzia glyptosperma F. W. Peirson 1927-5-7 7281 San Bernardino 1 mile east of Kramer. Comment
  RSA66505  Arabis glabra F. W. Peirson 1903-3-10 658 Los Angeles Laurel Canyon, Santa Monica Mts. Comment
  RSA66544  Dithyrea californica F. W. Peirson 1920-2-14 4178 Riverside Whitewater Station, Colorado Desert Comment
  RSA66701  Arabis perennans F. W. Peirson 1919-4-13 660 Riverside Along the Tahquitz creek, East of Palm Springs, Riverside. Comment
  RSA66704  Streptanthus barbiger F. W. Peirson 1923-7-7 3732 Mendocino 3 miles above Boonville Comment
Read comments
Aug 14 2013
  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
  RSA68621  Calochortus weedii var. intermedius Frank W. Peirson 1927-6-20 7350 Orange Site for botanical garden (Rancho Santa Ana) Comment
  RSA68707  Lilium pardalinum subsp. vollmeri Frank W. Peirson 1923-7-12 3688 Del Norte 15 miles south of Crescent City Comment
  RSA68711  Lilium rubescens Frank W. Peirson 3687 Los Angeles Road near Coldwater Canyon, Santa Monica Mts. Comment
Read comments
May 5 2010
  RSA69234  Gaultheria shallon F. W. Peirson 1912-6-27 845 Monterey Above 17 Mile Drive, Monterey Peninsula. Comment
  RSA69411  Delphinium parryi F. W. Peirson 1925-4-11 5745 Orange 5 miles south of Laguna Beach. Comment
  RSA69508  Veratrum fimbriatum Frank W. Peirson 1925-8-10 6402 Mendocino Jug Handle Creek, 6 miles north of Mendocino City Comment
  RSA69551  Mentzelia torreyi F. W. Peirson 1914-8-25 752 Mono Crooked Creek, Northern part of Volcanic Tableland Comment
Read comments
Jan 7 2016
  RSA69554  Mentzelia tridentata F. W. Peirson 1922-5-12 4111 San Bernardino 10 miles N of Barstow on Granite Wells Road Comment
  RSA69592  Triglochin maritima F. W. Peirson 1923-3-27 3391 San Diego Imperial Beach. Comment
  RSA69648  Goodyera oblongifolia Frank W. Peirson 1925-8-10 6397 Mendocino Jug Handle Creek, 6 miles north of Mendocino City. Comment
  RSA69806  Centaurium venustum F. W. Peirson 1926-4-30 6693 San Diego About 1 mile from Pala on the road to Henshaw Dam Comment
  RSA69896  Fraxinus velutina var. coriacea F. W. Peirson 1922-5-14 2994 San Bernardino Bottom land of Mojave River, between Oro Grande and Bridge. Comment
  RSA69916  Asclepias subulata F. W. Peirson 1935-4-17 11476 Riverside 30 miles north of Blythe. Comment
  RSA69943  Nitrophila occidentalis F. W. Peirson 1916-7-8 855 San Bernardino Near western end of Baldwin Lake. San Bernardino Mts Comment
  RSA69946  Grayia spinosa F. W. Peirson 1923-7-19 3716 Siskiyou About 2 miles S of Oregon line, Lowest Klamath Lake. Comment
  RSA69965  Abronia villosa F. W. Peirson 1930-4-15 8724 Inyo Near Amargosa River 9 miles south of Shoshone. Comment
  RSA69967  Abronia villosa var. aurita F. W. Peirson 1924-8-29 5060 Orange Santa Ana Comment
  RSA69969  Abronia villosa var. villosa F. W. Peirson 1927-4-15 7205 Imperial near Colorado River, Ft. Yuma Comment
  RSA70003  Tidestromia oblongifolia F. W. Peirson 1937-11-27 12319 Riverside La Quinta, Coachella Valley. At sea-level. 0 Comment
  RSA70137  Triteleia clementina F. W. Peirson 1923-4-9 3472 Los Angeles San Clemente Island: canyon running to Middle Ranch Comment
  RSA70159  Dichelostemma capitatum subsp. capitatum F. W. Peirson 1924-5-31 4672 Orange 5 miles southeast of Laguna Beach. Comment
  RSA70219  Allium praecox F. W. Peirson 1922-4-14 2915 San Diego Grossmont, 10 miles east of San Diego. Comment
  RSA70258  Vaccinium uliginosum subsp. occidentale F. W. Peirson 1933-8-4 s.n. Inyo South of Long Lake, Rock Creek Lake Basin Comment
  RSA70263  Juncus phaeocephalus var. phaeocephalus F. W. Peirson 1923-7-11 3669 Humboldt 7 miles N of Arcata, Humboldt County Comment
  RSA70384  Euphorbia peplus F. W. Peirson 1925-9-20 6433 Alameda Hills back of Oakland. Comment
  RSA70390  Chamaesyce polycarpa var. polycarpa F. W. Peirson 1924-5-31 4663 Orange 5 miles southeast of Laguna Beach. Comment
  RSA70396  Chamaesyce serpillifolia F. W. Peirson 2039 Los Angeles Laurel Canyon, Santa Monica Mts. Comment
  RSA70428  Ditaxis lanceolata F. W. Peirson 1928-4-22 7877 San Diego steep rocky canyon immediately west of the Narrows, San Felipe Creek. Comment
  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
  RSA70558  Croton californicus F. W. Peirson 1920-12-29 4439 Riverside 1.5 miles east of Whitewater Station, head of Coachella Valley. Comment
  RSA70607  Iris hartwegii subsp. australis Frank W. Peirson 1916-7-6 1692 San Bernardino Bear Lake region [Big Bear Lake], San Bernardino Mountains. Comment
  RSA70609  Agave deserti subsp. deserti Frank W. Peirson 1928-3-24 7753 San Diego San Felipe Canyon [Banner Canyon], shortly above the Narrows Comment
  RSA70853  Arctostaphylos glandulosa subsp. adamsii F. W. Peirson 1925-5-16 5936 San Diego Monument Peak, Laguna Mts. Comment
  RSA70862  Arctostaphylos glauca F. W. Peirson 1927-4-18 7233 San Diego About 1/2 way from Newtown to Buckman Sps. Comment
  RSA71000  Cuscuta salina F. W. Peirson 1920-7-31 899 San Luis Obispo Morro Bay Comment
  RSA71112  Calystegia soldanella F. W. Peirson 1923-7-11 3805 Humboldt 18 miles north of Eureka Comment
  RSA71850  Gilia cana subsp. speciformis F. W. Peirson 1922-5-12 4138 San Bernardino Mojave Desert. 10 miles north of Barstow. Comment
  RSA71862  Allophyllum glutinosum F. W. Peirson 1930-5-10 8777 San Diego 4 miles south of Oak Grove, eastern San Diego Co. 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
  RSA71874  Gilia aliquanta subsp. breviloba F. W. Peirson 1935-3-16 11409 Kern South slope of Tehachapi Range and 4 miles north of Mojave Comment
  RSA72186  Epilobium glaberrimum subsp. glaberrimum F. W. Peirson 1908-7-22 s.n. Tulare Near Hockett Meadows, Sequoia National Park Comment
  RSA72237  Camissonia claviformis subsp. aurantiaca F. W. Peirson 1920-2-16 2707 Riverside Palm Canyon stream below the canyon, Palm Springs. region Comment
  RSA72239  Camissonia claviformis subsp. yumae F. W. Peirson 1932-3-21 9768 Imperial 6 miles east of Holtville. 0 Comment
  RSA72255  Camissonia claviformis subsp. claviformis F. W. Peirson 1930-5-12 8796 Kern 8 miles east of Mojave Comment
  RSA72257  Camissonia cheiranthifolia subsp. suffruticosa F. W. Peirson 1923-3-26 3408 San Diego Agua Hedionda Comment
  RSA72259  Camissonia cheiranthifolia subsp. cheiranthifolia F. W. Peirson 1912-6-27 788 Monterey Monterey coast Comment
  RSA73004  Leptosiphon aureus F. W. Peirson 1927-5-29 7333 Kern 10 miles north of Red Rock canyon, Indian Wells Valley, Western Mojave Desert. Comment
  RSA73290  Linanthus californicus F. W. Peirson 1918-5-4 158 Los Angeles Summit of Santa Monica Range, above Brents on the Malibu Comment
  RSA73296  Linanthus pungens subsp. hookeri F. W. Peirson 1923-7-19 3809 Siskiyou Road crossing over Whitney Creek, foot of Mt. Shasta Comment
  RSA73315  Clarkia cylindrica F. W. Peirson 1933-7-9 10678 Kern About 6 miles from Caliente on road to Bodfish. Comment
  RSA73327  Clarkia amoena subsp. whitneyi F. W. Peirson 1923-7-8 3792 Mendocino Ten-mile River Comment
  RSA73669  Navarretia leptalea F. W. Peirson 1913-8-22 939 Inyo Taboose Pass, Sierra Nevada. Comment
  RSA73689  Leptosiphon breviculus F. W. Peirson 1916-7-6 938 San Bernardino Bear Lake. San Bernardino Mts. Comment
  RSA74175  Phacelia ambigua F. W. Peirson 1922-4-9 4126 Riverside Palm Canyon Region, near Palm Springs. Comment
  RSA74500  Phacelia minor F. W. Peirson 1918-1 162 Los Angeles burned area east of Rubio Canyon Comment
  RSA74710  Nama hispida var. revoluta F. W. Peirson 1941-4-8 s.n. Imperial 10 miles NW of Ogilby. Comment
  RSA74713  Nama demissa var. deserti F. W. Peirson 1920-2-15 2315 Riverside Palm Springs, Tahquitz Camp. Comment
  RSA74716  Nama demissa var. covillei F. W. Peirson 1928-4-1 7766 San Bernardino 33 miles north of Baker. Comment
  RSA74726  Phacelia curvipes F. W. Peirson 1916-7-6 986 San Bernardino Bear Lake. San Bernardino Mts. Comment
  RSA75139  Nemacladus rubescens F. W. Peirson 1926-1-31 6486 Riverside About 2 miles from Dos Palmas on road to Mecca, Colorado Desert. Comment
  RSA75148  Nemacladus glanduliferus F. W. Peirson 1927-4-16 7219 Imperial Foot of Mountain Springs Grade, Western Imperial County Comment
  RSA75372  Camissonia boothii subsp. boothii F. W. Peirson 1916-7-9 792 San Bernardino Mojave Desert, near Victorville. Comment
  RSA75435  Camissonia pallida subsp. pallida F. W. Peirson 1919-4-13 786 Riverside Tahquitz Canyon stream, near Palm Springs. Comment
  RSA75437  Camissonia hirtella F. W. Peirson 1918-5-4 2309 Los Angeles Summit of Santa Monica Range, above Brents on the Malibu Comment
  RSA75519  Phacelia adenophora F. W. Peirson 1926-6-24 6851 Lassen On Madeline Plain. Comment
  RSA75527  Phacelia fremontii F. W. Peirson 1930-4-16 8745 San Bernardino About 18 miles north of Goffs on the Cima Road. Comment
  RSA75799  Pholistoma auritum F. W. Peirson 1923-3-25 4481 Orange Aliso Creek, near Laguna Beach. 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
  RSA77147  Ceanothus crassifolius F. W. Peirson 1903-2-14 5378 Los Angeles Arroyo Seco near Pasadena Comment
  RSA77160  Ceanothus leucodermis F. W. Peirson 1926-5-1 6712 San Diego Along trail from Oak Grove to Palomar Mt. Comment
  RSA77166  Ceanothus leucodermis F. W. Peirson 1925-5-17 5950 San Diego Lower part of Vallecito Canyon. Comment
  RSA77180  Malvella leprosa F. W. Peirson 1924-8-29 5068 Orange 4 miles S of Santa Ana Comment
  RSA77191  Horsfordia newberryi F. W. Peirson 1928-4-22 7874 San Diego San Felipe Creek about 4 miles below Sentenac Canyon. Comment
  RSA77218  Sphaeralcea ambigua subsp. monticola F. W. Peirson 1928-4-2 7795 Inyo 2 miles E of Bradbury Well, Death Valley Region Comment
  RSA77228  Ayenia compacta F. W. Peirson 1919-4-14 2069 Riverside Murray Canyon, near Palm Springs. Comment
  RSA77235  Eriodictyon californicum F. W. Peirson 1912-1 988 Santa Cruz Santa Cruz Mtns. Comment
  RSA77239  Eriodictyon crassifolium var. nigrescens F. W. Peirson 1918-5-19 171 Los Angeles north of Dawn Station on trail to Dawn Mine, Millards Canyon Comment
  RSA77415  Brandegea bigelovii F. W. Peirson 1927-4-12 7166 Riverside In Painted Canyon near Mecca. Comment
  RSA77417  Citrullus lanatus F. W. Peirson 1923-9-10 4047 San Diego 3 mi. from coast at Torrey Pines Comment
  RSA77425  Petalonyx linearis F. W. Peirson 1935-4-16 11460 Imperial North of bridge of canal at Laguna Dam [AZ], north of Yuma. Comment
Read comments
Feb 25 2008
  RSA77427  Petalonyx nitidus F. W. Peirson 1927-5-29 7335 Kern Red Rock Canyon, Southwestern Kern County Comment
  RSA77810  Pholisma arenarium F. W. Peirson 1939-11-25 12902 San Diego San Felipe canyon just above the Narrows, eastern San Diego County. Comment
  RSA77816  Pectocarya peninsularis F. W. Peirson 1920-2-16 1013 Riverside Palm Canyon stream below the canyon, Palm Springs. region Comment
  RSA77820  Pectocarya platycarpa F. W. Peirson 1928-4-24 7908 Riverside Cottonwood Spring, west end of Eagle Mtns. Comment
Read comments
Oct 9 2010
  RSA77846  Callitriche marginata F. W. Peirson 1922-5-12 3067 Riverside South of Lake Elsinore. Comment
  RSA77867  Pectocarya linearis subsp. ferocula F. W. Peirson 1918-5-5 1017 Los Angeles Brents on the Malibu, Santa Monica Mountains. Comment
  RSA77887  Tiquilia palmeri F. W. Peirson 1926-2-22 5421 Riverside Thousand-Palms Canyon; Coachella Valley Comment
  RSA77889  Tiquilia palmeri F. W. Peirson 1927-4-12 7176 Riverside Painted Canyon, near Mecca Comment
  RSA78646  Castilleja cinerea F. W. Peirson 1943-5-30 13548 San Bernardino Baldwin Lake. Comment
  RSA79574  Cryptantha incana F. W. Peirson 1908-7-23 1036 Tulare North Fork of Middle Fork of Tule River. Sequoia National Park. Comment
  RSA79588  Cryptantha angustifolia F. W. Peirson 1926-2-22 6508 Riverside Thousand-Palms Canyon; Coachella Valley Comment
  RSA79777  Penstemon rydbergii var. oreocharis F. W. Peirson 1926-6-21 6772 Butte Butte Meadow, Humboldt Road. Comment
  RSA79779  Penstemon centranthifolius F. W. Peirson 1905-1 200 Los Angeles Mt. Lowe, San Gabriel Mountains. Comment
  RSA79838  Penstemon heterophyllus subsp. heterophyllus F. W. Peirson 202 Los Angeles Devils Gate, Arroyo Seco, west of Pasadena. Comment
  RSA79863  Keckiella rothrockii F. W. Peirson 1908-7-19 1120 Tulare Upper Kern Canyon, Sierra Nevada. Comment
  RSA79880  Datura wrightii F. W. Peirson 1924-8-29 5095 Orange Road from Artesia to Hungtington Beach, along ditch Comment
  RSA80043  Castilleja praeterita F. W. Peirson 1911-8-8 s.n. Tulare Cottonwood Pass, Sierra Nevada. Comment
  RSA80069  Veronica arvensis F. W. Peirson 1919-4-25 1096 Los Angeles Lawn at 1077 New York Drive, Altadena. Comment
  RSA80087  Mimulus tricolor F. W. Peirson 1925-3-21 5601 Tulare About 3 miles south of Lindsay. Comment
  RSA80207  Plagiobothrys arizonicus F. W. Peirson 1930-4-16 8727 San Bernardino 8 miles south of Cima, eastern San Bernardino Comment
  RSA80221  Penstemon clevelandii F. W. Peirson 1928-3-24 7732 San Diego San Felipe Creek, Sentenac Canyon. Comment
  RSA80313  Lycium andersonii F. W. Peirson 1935-4-18 11492 San Bernardino Copper Basin Creek, Whipple Mountains Comment
  RSA80343  Orthocarpus densiflorus var. gracilis F. W. Peirson 1164 Los Angeles Garvanza. Comment
  RSA80389  Eryngium armatum F. W. Peirson 1925-8-10 6361 Mendocino Jug Handle Creek, 6 miles north of Mendocino City Comment
  RSA80431  Antirrhinum kelloggii F. W. Peirson 189 Los Angeles Laurel Canyon, Santa Monica Mts. Comment
  RSA80683  Oligomeris linifolia F. W. Peirson 1925-4-11 5744 Orange 5 miles southeast of Laguna Beach. Comment
  RSA80686  Oligomeris linifolia F. W. Peirson 1922-4-12 1925 Imperial 15 miles south of Coachella. Comment
Read comments
Apr 1 2013
  RSA80715  Grindelia camporum var. bracteosa F. W. Peirson 1218 Los Angeles Road near Coldwater Canyon, Santa Monica Mts. Comment
  RSA80727  Nicotiana obtusifolia F. W. Peirson 1924-5-14 4579 San Bernardino 12 miles east of Victorville. Comment
  RSA80738  Cryptantha maritima F. W. Peirson 1927-4-12 7172 Riverside Painted Canyon, near Mecca Comment
  RSA80749  Cryptantha racemosa F. W. Peirson 1927-4-12 7170 Riverside Painted Canyon, near Mecca Comment
  RSA80760  Cryptantha nevadensis F. W. Peirson 1922-4-13 2857 San Diego Mountain Springs, eastern San Diego County. Comment
  RSA81010  Fouquieria splendens F. W. Peirson 1921-3-23 2391 Riverside Deep canyon wash, south of Coachella Valley Comment
  RSA81470  Castilleja applegatei subsp. martinii F. W. Peirson 1926-5-1 6705 San Diego Along trail from Oak Grove to Palomar Mt. Comment
  RSA82062  Cordylanthus maritimus subsp. maritimus F. W. Peirson 1924-8-29 5098 Los Angeles 2 miles south of Artesia Comment
  RSA82105  Mimulus aurantiacus var. parviflorus F. W. Peirson 1934-3-25 11047 Santa Barbara Santa Cruz Island. Frye's Harbor. Comment
  RSA82111  Utricularia vulgaris subsp. macrorhiza F. W. Peirson 1928-9-5 5113 San Bernardino Victorville Comment
  RSA82231  Castilleja affinis F. W. Peirson 1920-7-29 1149 San Luis Obispo 1 mile south of Pismo Beach. Comment
  RSA82254  Castilleja angustifolia F. W. Peirson 1922-5-13 4152 San Bernardino Granite Wells, Mojave Desert. Comment
  RSA82350  Scutellaria nana F. W. Peirson 1923-7-19 3826 Siskiyou 20 miles north of Bray. Comment
  RSA83970  Saxifraga californica F. W. Peirson 1926-4-2 6569 Lake Hopland grade. Comment
  RSA83973  Saxifraga californica F. W. Peirson 1925-4-11 5730 Orange Slope above mill, in Silverado Canyon, Santa Ana Mountains. Comment
  RSA83992  Saxifraga californica F. W. Peirson 1934-3-29 11095 Santa Barbara Santa Cruz Island. Fry s Creek, at Frys Harbor . Comment
  RSA84471  Clematis pauciflora F. W. Peirson 1925-5-17 s.n. San Diego Lower Vallecito Canyon, east base of Laguna Mountains. Comment
  RSA84516  Ribes aureum var. gracillimum F. W. Peirson 1921-3-6 687 Los Angeles Foothill Blvd. 1 mile east of Monrovia Comment
  RSA84839  Ribes nevadense F. W. Peirson 1926-5-1 6714 San Diego Sour Dough Spring, east trail from Palomar Mt. to Oak Grove. Comment
  RSA84970  Ribes speciosum F. W. Peirson 1927-3-19 7112 Los Angeles Seminole Hot Springs. Santa Monica Mts. Comment
  RSA84976  Potamogeton gramineus F. W. Peirson 1914-8-9 1538 Fresno Florence Lake, Sierra Nevada. Comment
  RSA85023  Polystichum munitum F. W. Peirson 1934-3-28 11083 Santa Barbara in Diablo canyon, Frye's Harbor, Santa Cruz Island. Comment
  RSA85173  Ephedra funerea F. W. Peirson 1928-4-2 7790 Inyo About 1 mile south of Bradbury Well, Mojave Desert (Death Valley region). Comment
  RSA85176  Ephedra trifurca F. W. Peirson 1922-3-21 9774 Imperial Near summit of Sand Hills, east of Holtville. Comment
  RSA85192  Sparganium angustifolium F. W. Peirson 1914-8-9 1536 Fresno Florence Lake, Sierra Nevada. Comment
  RSA85205  Horkelia sericata F. W. Peirson 1923-7-12 3749 Del Norte 10 miles northeast of Gasquet Comment
  RSA85209  Horkelia wilderae F. W. Peirson 1922-6-25 4277 San Bernardino Barton Flats. Comment
  RSA85310  Paeonia californica Mabel Peirson 1925-2-14 5434 Los Angeles Arroyo Seco at the Devil's Gate, Pasadena Comment
  RSA85524  Calycanthus occidentalis F. W. Peirson 1932-7-6 10250 Mendocino Dimmick Memorial Park; Navarro River. Comment
  RSA85691  Potentilla gracilis var. flabelliformis F. W. Peirson 1926-6-25 6883 Modoc 1 mile east of summit of Cedarville Road, Warner Mountains Comment
  RSA85936  Selaginella bigelovii Mabel B. Peirson 1927-4-14 7143 Santa Barbara Santa Cruz Island, Prisoners Cove. Comment
Read comments
Dec 30 2014
  RSA85950  Pentagramma triangularis subsp. viscosa F. W. Peirson 1922-4-14 2888 San Diego Torrey Pines Park, near La Jolla. Comment
  RSA86293  Potentilla wheeleri F. W. Peirson 1908-7-13 1980 Tulare Volcano Creek. Comment
  RSA86358  Pinus muricata F. W. Peirson 1925-8-10 6408 Mendocino On coast south of Mendocino City, Northern California. Comment
  RSA86620  Purshia tridentata var. tridentata F. W. Peirson 1925-7-5 6272 El Dorado Mt. Tallac Comment
  RSA86646  Chamaebatia foliolosa F. W. Peirson 1908-7-11 1956 Kern Little Kern River, Southern Sierra Nevada. Comment
  RSA86667  Ammophila arenaria F. W. Peirson 1941-7-29 13112 Humboldt Little River Beach State Park. Comment
  RSA86685  Leymus triticoides F. W. Peirson 1930-7-1 8954 San Bernardino Southwest shore of Baldwin Lake Comment
  RSA86687  Leymus triticoides F. W. Peirson 1938-7-8 12415 Inyo Near bank of Lone Pine Creek, west of Alabama Hills. Comment
  RSA86710  Lolium temulentum F. W. Peirson 1923-6-6 3648 Mendocino Indian Creek, southern Mendocino County Comment
  RSA86787  Lolium perenne subsp. multiflorum F. W. Peirson 1932-7-4 s.n. San Luis Obispo Oceano. Comment
  RSA86851  Prunus emarginata F. W. Peirson 1908-7-10 698 Tulare Tule River, Sierra Nevada. Comment
  RSA86937  Corylus cornuta var. californica F. W. Peirson 1908-7-24 1707 Tulare North Fork of Tule River, Sierra Nevada. Comment
  RSA86939  Lithocarpus densiflorus var. densiflorus F. W. Peirson 1912-6-28 1711 Santa Cruz Santa Cruz. Comment
  RSA87033  Lupinus shockleyi F. W. Peirson 1922-5-14 7716 San Bernardino 1 mile north of Barstow, San Bernardino County Comment
  RSA87068  Koeleria macrantha F. W. Peirson 1918-4-28 1596 Los Angeles Road east and south of El Monte. Comment
  RSA87144  Quercus wislizeni var. frutescens F. W. Peirson 1924-6-26 4867 San Diego At foot of steep portion of trail from Vallecito Canyon to Laguna Mts. Comment
  RSA87353  Muhlenbergia filiformis F. W. Peirson 1922-6-23 4324 San Bernardino Sugarloaf Mountains Comment
  RSA87356  Muhlenbergia microsperma F. W. Peirson 1921-3-22 4323 Riverside Andreas Canyon, Palm Springs region Comment
  RSA87441  Melica imperfecta F. W. Peirson 1923-4-12 3420 Los Angeles Wilson's Cove, San Clemente Island Comment
  RSA90217  Astragalus bernardinus F. W. Peirson 1930-5-31 8924 San Bernardino Summit of grade above Warrens Well. Little San Bern Mtns. Comment
  RSA90306  Lotus rigidus F. W. Peirson 1919-4-14 712 Riverside Murray Canyon, near Palm Springs. Comment
  RSA90697  Gutierrezia californica F. W. Peirson 1920-12-28 5298 Riverside Murray Canyon near Palm Springs Comment
  RSA91096  Trifolium variegatum F. W. Peirson 1919-4-14 561 Riverside Murray Canyon, near Palm Springs. Comment
  RSA91724  Gastridium phleoides F. W. Peirson 1926-4-30 6700 San Diego About 2 miles east from Pala on the road to Henshaw Dam Comment
  RSA93726  Pleurocoronis pluriseta F. W. Peirson 1919-4-13 1213 Riverside Tahquitz Canyon, near Palm Springs. Comment
Read comments
Sep 18 2011
  SBBG29162  Oxytheca dendroidea subsp. dendroidea F. W. Peirson 1925-6-25 6038 Mono grade up volcanic tableland [in 1925, "grade" = Rock Creek Road) Comment
Read comments
Feb 8 2013
  SBBG54411  Phalaris californica F. W. Peirson 1932-7-6 10257 Mendocino Hale's Grove Auto Camp, rd from Westport Comment
  SBBG97362  Acmispon strigosus F. W. Peirson 1934-3-28 Santa Barbara Diablo Cyn, ca. 1 mi W of Frys Harbor Comment
  SD87524  Langloisia setosissima subsp. punctata Frank W. Peirson 1927-5-7 7287 San Bernardino 4.0 miles west of Barstow. Comment
  SD87545  Baccharis salicina F. W. Peirson 1924-10-19 5228 Los Angeles Clearwater Comment
  SD87552  Eriastrum eremicum subsp. eremicum Frank W. Peirson 1926-4-27 6684 San Bernardino 18 miles east of Victorville, Box S. Ranch vicinity. Comment
  SD87597  Symphyotrichum lanceolatum subsp. hesperium F. W. Peirson 1924-10-19 5241 Orange Wintersberg Comment
  SD87609  Silene menziesii subsp. dorrii Frank W. Peirson 1925-6-25 6058 Mono Rock Creek, Volcanic Tablelands. Comment
  SD87639  Helianthus nuttallii subsp. parishii F. W. Peirson 1924-10-19 5247 Orange Wintersberg Comment
  SD87737  Brickellia oblongifolia var. linifolia Frank W. Peirson 1925-6-30 6166 Mono West Fork Walker River below Cris Flats. Comment
  SD87742  Chaenactis stevioides Frank W. Peirson 1927-4-16 7208 Imperial 2.0 miles below foot of Mountain Springs Grade. Comment
  SD87753  Myriopteris covillei Frank W. Peirson 1921-3-22 2331 Riverside Murray CaA'on Comment
  SD87786  Atriplex hymenelytra F. W. Peirson 1924-12-30 5415 Riverside 1000 Palms Canon Comment
  SD87866  Phacelia bicolor Frank W. Peirson 1930-5-31 8919 San Bernardino Road from Lovejoy Buttes to Adelanto Comment
  SD87868  Porophyllum gracile F. W. Peirson 1922-4-13 2882 Imperial Foot of Mountain Springs Grade Comment
  UC1076515  Erigeron linearis Frank W. Peirson 1925-7-6 6290 El Dorado Angora Lookout Fallen Leaf Lake, Angora Lookout Comment
  UC1366095  Ribes divaricatum var. pubiflorum Frank W. Peirson 1938-4-13 12384 Santa Barbara 2 mi s Surf (1/2 mi up stream); Bear Creek Comment
  UC501445  Tetradymia canescens Frank W. Peirson 1932-7-20 10354 Lassen 20 mi se Susanville Comment
  UC501447  Galinsoga parviflora var. parviflora Frank W. Peirson 1931-4-11 9375 Los Angeles 1077 New York Avenue Altadena Comment
  UC501449  Monoptilon bellioides Frank W. Peirson 1927-4-24 7899 Riverside Cottonwood Spring Comment
Read comments
Oct 9 2010
  UC501486  Polygala californica Frank W. Peirson 1923-7-7 3758 Mendocino 5 mi below Boonville Comment
  UC511758  Phacelia fremontii Frank W. Peirson 1925-3-18 5474 Kern s slope Tehachapi Pass Comment
  UC635537  Clematis pauciflora Frank W. Peirson 1927-4-17 7225 San Diego summit Mountain Springs Grade (on escarpment s. of rd.) Comment
  UC672541  Mimulus palmeri Frank W. Peirson 1925-5-15 5919 San Diego Laguna Lakes Camp Laguna Mts. Comment
  UC908445  Linanthus parryae Frank W. Peirson 1928-4-4 7827 Kern 11 mi N of Johannesburg Comment
  UC908542  Eriastrum pluriflorum Frank W. Peirson 1927-5-7 7268 Los Angeles 12 mi s Muroc Comment
  UC908887  Gilia ochroleuca subsp. vivida Frank W. Peirson 1918-6-30 155 Los Angeles summit Mount Wilson San Gabriel Mountains, summit Mount Wilson Comment
  UC909102  Loeseliastrum schottii Frank W. Peirson 1927-5-7 7275 San Bernardino 1 mi. e. Kramer Comment
  UC909108  Loeseliastrum schottii Frank W. Peirson 1927-4-16 7218 Imperial foot of Mountain Springs Grade (along n. bank of stream) 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
  UCD64091  Digitaria sanguinalis F. W. Peirson 1917-9-1 1592 Los Angeles 1077 New York Avenue, Altadena. Comment
  CAS-BOT-BC115145  Carex vesicaria Frank Warrington Peirson 1926-6-21 6788 Plumas Open flat strip along shore of Lake, Lake Almanor. Comment
  CAS-BOT-BC166414  Epilobium canum subsp. canum Peirson 1920-7-30 2234 San Luis Obispo Willow Creek, Morro region, sea level 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
  CAS-BOT-BC257953  Eriogonum parvifolium F. W. Peirson 1920-7-28 1760 Ventura Along the coast about 3 miles west of Ventura 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
  CAS-BOT-BC355772  Osmadenia tenella F. W. Peirson 1926-4-25 6643 Orange Upper part of Laguna Canyon Comment
  CAS-BOT-BC376605  Syntrichopappus fremontii Frank W. Peirson 1928-4-2 7806 Inyo 18 miles south of Ryan, Death Valley Region Comment
  CAS-BOT-BC384747  Arenaria serpyllifolia var. serpyllifolia Frank W. Peirson 1924-5-27 4622 Los Angeles San Gabriel Mts. Colby's Ranch 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
  CAS-BOT-BC407620  Gilia ochroleuca subsp. exilis Frank W. Peirson 1919-4-15 921 Riverside Whitewater Grade above Cabazon Comment
  CAS-BOT-BC423096  Cleomella obtusifolia Frank W. Peirson 1930-8-2 9044 Inyo Little Lake. 1/4 mile north of garage along old road Comment
  CAS-BOT-BC431346  Nemacladus californicus Frank W. Peirson 1922-5-12 2968 Fresno 22 mi N of Barstow Comment
  CAS-BOT-BC436639  Luzula comosa var. laxa F. W. Peirson 1925-7-29 11721 A Alpine Woods Lake Comment
  GH363701  Boykinia occidentalis F. W. Peirson 1923-6-27 Unknown Redwood Creek, at Notreys Landing Comment
  HSC4250  Spergularia rubra F. W. Peirson 1925-8-10 6409 Mendocino Grade down to stream, Albion Comment
  JEPS51052  Sagina saginoides Frank W. Peirson 1913-2 Ventura Seymour Creek Comment
  JEPS62536  Salvia apiana Frank W. Peirson 1918-6-28 180 Los Angeles Mt. Lowe foothills Mt. Lowe Comment
  JEPS68644  Malva nicaeensis F. W. Peirson 3356 Los Angeles streets of Claremont Claremont Comment
  LA38972  Mimulus guttatus Frank W. Peirson; 1918-5-19 197 Los Angeles San Gabriel Mountains, Trail from Dawn Station to Dawn Mine Comment
  PASA1130  Stachys ajugoides Frank W. Peirson 1932-7-7 Humboldt Near Willow Creek Comment
  PASA1168  Mentha pulegium Frank W. Peirson 1925-8-8 Sonoma 5 miles east of Santa Rosa Comment
  PASA1664  Lupinus horizontalis var. platypetalus Frank W. Peirson 1922-5-12 San Bernardino 22 miles north of Barstow on the Granite Wells Road Comment
  PASA1690  Lessingia glandulifera var. pectinata Frank W. Peirson 1923-6-26 Monterey Auto Camp 3 miles from Monterey on the Salinas Road Comment
  PASA1934  Cornus sessilis Frank W. Peirson 1932-7-7 Humboldt Wild Creek Comment
  PASA2775  Senecio lugens var. exaltatus F. W. Peirson 1921-7-3 Y 69 Mariposa Little Yosemite Comment
  PASA2777  Gilia leptalea F. W. Peirson 1921-7-3 Y 71 Mariposa above Little Yosemite Comment
  PASA2804  Orobanche uniflora F. W. Peirson 1921-7-9 Y 104 Mariposa Ten Lakes trail Comment
  PASA2815  Lonicera conjugialis F. W. Peirson 1921-7-9 Y 115 Mariposa Ten Lakes trail Comment
  PASA2817  Godetia viminea F. W. Peirson 1921-7-9 Y 118 Mariposa Near foot of upper Yosemite Falls Comment
  PASA2819  Lupinus longipes F. W. Peirson 1921-6-27 Y 20 Mariposa Below Yosemite Falls Comment
  PASA2825  Cystopteris fragilis F. W. Peirson 1921-6-28 Y 26 Mariposa Tenaya Canyon Comment
  PASA283  Symphoricarpos albus Frank W. Peirson 1923-6-27 Monterey Redwood Creek at Notery's Landing Comment
  PASA2838  Mitella breweri F. W. Peirson 1921-7-1 Y 36 Mariposa above Lake Merced Comment
  PASA2845  Thalictrum fendleri F. W. Peirson 1921-7-1 Y 42 Mariposa above Lake Merced Comment
  PASA2847  Ranunculus alismifolius var. alismellus F. W. Peirson 1921-7-1 Y 44 Mariposa marshes above Lake Merced Comment
  PASA2849  Ribes roezlii F. W. Peirson 1921-7-1 Y 46 Mariposa above Lake Merced Comment
  PASA2852  Sedum obtusatum F. W. Peirson 1921-7-1 Y 50 Mariposa granite slopes below Lake Merced Comment
  PASA2858  Potentilla lactea F. W. Peirson 1921-7-3 Y 51 Mariposa glaciated granite slopes below Lake Merced Comment
  PASA2860  Geranium richardsonii F. W. Peirson 1921-7-3 Y 57 Mariposa Merced Lake Trail; locality same as Y55 Comment
  PASA2863  Penstemon confertus F. W. Peirson 1921-7-8 Y 95 Mariposa ""Dream Lake"", Ten Lakes Comment
  PASA375  Montia sibirica Mabel B. Peirson 1926-3-28 Marin Tennessee Cove Comment
  PASA614  Scirpus rostellatus Frank W. Peirson 1922-7-7 San Bernardino Swartout Valley. Marsh near Ranger's Cabin Comment
  POM175484  Hypericum concinnum Mabel Peirson 1926-5-31 2071 Marin Mt. Tamalpais Comment
  POM175550  Downingia elegans var. corymbosa F. W. Peirson 1923-7-10 3871 Humboldt About 6 miles N of Garbersville. Comment
  POM20560  Veronica scutellata F. W. Peirson 1923-7-7 s.n. Mariposa Navarro River. Comment
  POM212924  Cheilanthes parryi F. W. Peirson 1935-4-18 11501 San Bernardino Whipple Mountains, Northern Part of Range Comment
  POM254665  Atriplex serenana F. W. Peirson 1923-10-7 4162 Los Angeles Santa Clara River at Aqueduct crossing. Comment
  POM47640  Lathyrus torreyi F. W. Peirson 1923-6-29 3628 Santa Cruz Santa Cruz Mts. Comment
  POM87051  Allium dichlamydeum F. W. Peirson 1925-8-10 6398 Mendocino Jug Handle Creek. Comment
  POM87070  Claytonia sibirica F. W. Peirson 1925-8-10 6403 Mendocino Jug Handle Creek, Mendocino County Comment
  POM89887  Fritillaria recurva Frank W. Peirson 1926-4-3 6622 Lake South of Middletown near Napa County line Comment
  POM98580  Downingia bacigalupii F. W. Peirson 1926-6-21 6802 Plumas Lake Almanor. Comment
  POM98583  Cordylanthus tenuis subsp. viscidus F. W. Peirson 1926-6-22 6807 Shasta Lassen National Park, in vicinity of Boiling Lake Comment
  POM98586  Erythronium purpurascens Frank W. Peirson 1926-6-23 6844 Shasta Trail to summit of Lassen Peak, Lassen National Park. Comment
  POM98605  Potentilla gracilis var. flabelliformis F. W. Peirson 1926-6-25 6883 Modoc 1 mile east of summit of Cedarville Road, Warner Mountains Comment
  POM98607  Orthocarpus cuspidatus subsp. copelandii F. W. Peirson 1926-6-25 6871 Modoc Cedarville Road, Warner Mountains. Comment
  POM99735  Antirrhinum coulterianum F. W. Peirson 188 Los Angeles Foothills east of Rubio C. San Gabriel Mts. Comment
  RSA0008570  Cryptantha traskiae F. W. Peirson 1923-4-11 3421 Los Angeles In canyon below farm buildings at Eagle Ranch, San Clemente Island Comment
  RSA0011821  Shepherdia argentea F. W. Peirson 1910-7-21 2078 Mono Along stream near Farrington's, Mono Valley. Comment
  RSA0025703  Abronia latifolia F. W. Peirson 1923-6-27 1847 Monterey Seventeen Mile Drive, Monterey. Comment
  RSA0025948  Abronia umbellata F. W. Peirson 1920-7-29 2324 San Luis Obispo 1 mile S of Pismo Beach. Comment
  RSA0028451  Geranium dissectum Mabel Peirson 1926-5-31 s.n. Alameda Berkeley Hills Comment
  RSA0028541  Geranium molle Mabel Peirson 1926-3-28 6536 Marin Tennessee Cove. Comment
  RSA0028542  Geranium molle F. W. Peirson 1925-8-10 6385 Mendocino Jug Handle Creek, 6 miles north of Mendocino City. Comment
  RSA0029589  Geranium viscosissimum var. nervosum F. W. Peirson 1926-6-25 6864 Modoc Cedarville Road, west slope of Warner Mts. Comment
  RSA0042708  Thysanocarpus conchuliferus F. W. Peirson 1934-3-26 11054 Santa Barbara Santa Cruz Island. Slope east of canyon above Frye s Harbor. Comment
  RSA0057650  Eremogone congesta var. suffrutescens F. W. Peirson 1911-8-8 627 Inyo Cottonwood Creek, Sierra Nevada. Comment
  RSA0059185  Orobanche uniflora subsp. occidentalis Frank W. Peirson 1934-3-29 11088 Santa Barbara Banks of Frye's Inlet, Santa Cruz Island. Comment
  RSA0070478  Orobanche californica subsp. feudgei Frank W. Peirson 1926-5-1 6722 San Diego Bottom lands of Temecula River, Oak Grove. Comment
  RSA0070582  Cirsium brevistylum F. W. Peirson 1925-8-10 6365 Mendocino Jug Handle Creek, 6 miles north of Mendocino City. Comment
  RSA0077928  Orobanche corymbosa subsp. corymbosa Frank W. Peirson 1938-7-8 12423 Inyo Sherwin Grade, north of Bishop. Comment
  RSA0080479  Pyrola dentata F. W. Peirson 1908-7-19 826 Tulare Upper Kern River Canyon. Comment
  RSA0087573  Linnaea borealis subsp. longiflora Frank W. Peirson 1923-7-13 3865 Del Norte About 2 miles south of Oregon line on road between Grants Pass and Gasquet. Comment
  RSA0091053  Amsinckia spectabilis var. microcarpa F. W. Peirson 1929-4-20 8299 Santa Barbara La Purissima Mission, north of Lompoc. Comment
  RSA0091277  Amsinckia spectabilis F. W. Peirson s.n. Los Angeles Ballona. Comment
  RSA0098127  Spergularia rubra F. W. Peirson 1925-8-10 6409 Mendocino Albion. Comment
  RSA0117237  Collinsia parviflora F. W. Peirson 1926-6-25 6891 Modoc Small side canyon 1 mile east of summit of Warner Mountains on Cedarville Road. Comment
  RSA0121162  Eriastrum pluriflorum subsp. sherman-hoytiae F. W. Peirson 1933-5-13 s.n. Los Angeles About 10 miles south of Munroc, Western Mojave Desert. Comment
  RSA0121659  Euphorbia albomarginata F. W. Peirson 1927-4-15 7200 Imperial Low land along Colorado River, near Ft. Yuma. Comment
  RSA0124165  Thysanocarpus desertorum F. W. Peirson 1922-5-13 2970 San Bernardino Granite Wells, Mojave Desert. Comment
  RSA0124856  Eriastrum wilcoxii F. W. Peirson 1911-8-7 934 Inyo Hockett Trail, Sierra Nevada. Comment
  RSA0125607  Echinocereus engelmannii var. engelmannii F. W. Peirson 1928-4-20 7843 San Diego Near summit of low hill on San Felipe Creek, about 2 miles above Sentenac Canyon. Comment
  RSA0128745  Boechera californica F. W. Peirson 1918-5-19 62 Los Angeles Near Dawn Station on trolley line to Mt. Lowe. Comment
  RSA087025  Lupinus densiflorus var. lacteus F. W. Peirson 1914-04 705 Riverside Whitewater at head of Coachella Valley. Comment
  RSA100245  Valeriana capitata subsp. californica F. W. Peirson 1925-7-6 6291 El Dorado Trail from Fallen Leaf to Angora Lookout, Sierra Nevada. Comment
  RSA100329  Campanula prenanthoides F. W. Peirson 1926-7-11 7023 Siskiyou About half way up the grade west of Etna or Etna Mills Comment
  RSA100331  Campanula prenanthoides F. W. Peirson 1908-1 1207 Tulare North fork or Tule River, Sierra Nevada. Comment
  RSA576932  Plectritis macrocera F. W. Peirson 1926-4-1 6562 Mendocino Hopland. Near Russian River. Comment
  RSA64797  Chenopodium macrospermum var. farinosum F. W. Peirson 1919-11-8 1826 Orange Aliso Creek. 0 Comment
  RSA65091  Eriogonum nudum var. oblongifolium F. W. Peirson 1923-7-7 3710 Mendocino 3 miles southeast of Boonville Comment
  RSA65094  Eriogonum caespitosum F. W. Peirson 1914-8-6 1770 Inyo Piute Pass. Comment
  RSA65345  Atriplex serenana F. W. Peirson 1923-10-7 4162 Los Angeles Bouquet Canyon, where Los Angeles Aqueduct crosses Santa Clara River. Comment
  RSA65394  Atriplex semibaccata F. W. Peirson 1928-1-14 7685 Los Angeles Vacant field east of Norwalk Insane Asylum. Comment
  RSA65475  Rumex salicifolius F. W. Peirson 1923-4-9 3473 Los Angeles San Clemente Island: about 6 miles SE of Wilson's Cove. Comment
  RSA65590  Moehringia macrophylla F. W. Peirson 1908-7-23 629 Tulare North Fork of Tule River, Sierra Nevada. Comment
  RSA65646  Claytonia gypsophiloides F. W. Peirson 1926-4-1 6555 Mendocino open bank on roadside, 5 mi. north of Cloverdale. Comment
  RSA65689  Silene scouleri var. scouleri F. W. Peirson 1936-7-15 11835 Marin Near the lighthouse, Point Reyes. Comment
  RSA65713  Silene bernardina F. W. Peirson 1908-7-10 614 Tulare Tule River near Nelson, Sierra Nevada. Comment
  RSA65726  Montia chamissoi F. W. Peirson 1914-8-7 603 Inyo Piute Creek, Sierra Nevada. Comment
  RSA65870  Polygonum hydropiperoides var. asperifolium F. W. Peirson 1923-1-21 1792 Los Angeles Pond north of East Lake Park, Los Angeles. Comment
  RSA65892  Centrostegia thurberi var. thurberi F. W. Peirson 1926-5-8 6725 Los Angeles 4 miles east of Palmdale, Antelope Valley. Comment
  RSA65912  Eriogonum nidularium F. W. Peirson 1914-8-26 1742 Mono Volcanic Tableland east of Long Valley Comment
  RSA65935  Polygonum bistortoides F. W. Peirson 1923-7-7 3704 Mendocino 1 mile north of Navarro River Comment
  RSA65942  Polygonum shastense F. W. Peirson 1910-7-29 1795 Unknown High pass betw Matterhorn Creek and Smerberg Lake, Sierra Nevada. [no county specified] Comment
  RSA66085  Tropidocarpum gracile F. W. Peirson 1903-2-24 1902 Los Angeles Eagle Rock Valley Comment
  RSA66205  Arabis repanda G. B. Peirson 1914-07 657 Tuolumne Tuolumne Meadow region, Sierra Nevada Comment
  RSA66323  Polygonum lapathifolium F. W. Peirson 1923-10-10 4160 Los Angeles Santa Clara River at crossing north of Saugus. Comment
  RSA66597  Rorippa curvisiliqua F. W. Peirson 1906 Los Angeles Playa del Rey. Comment
  RSA66694  Dicentra formosa subsp. formosa F. W. Peirson 1923-7-9 3731 Mendocino Grade 7 miles north of Westport Comment
  RSA68695  Maianthemum dilatatum Frank W. Peirson 1923-7-12 3675 Del Norte Northeast of Crescent City Comment
  RSA68721  Fritillaria recurva Frank W. Peirson, Mabel B. Peirson 1926-4-3 6622 Lake South of Middletown near Napa County line Comment
  RSA68744  Disporum hookeri var. hookeri Frank W. Peirson 1912-6-29 1673 Santa Cruz State Park, Santa Cruz. Comment
  RSA68797  Delphinium glaucum F. W. Peirson 1914-8-23 637 Madera Agnew's Trail, Sierra Nevada Comment
  RSA68979  Plantago maritima F. W. Peirson 1923-7-11 3857 Humboldt Flats north of Eureka. Comment
  RSA69231  Ledum glandulosum subsp. columbianum F. W. Peirson 1923-7-7 3796 Mendocino 2 miles east of Mendocino City. Comment
  RSA69276  Maianthemum racemosum subsp. amplexicaule Frank W. Peirson, Mabel B. Peirson 1925-4-10 6636 Contra Costa Boulevard near San Pablo Reservoir Comment
  RSA69292  Chlorogalum Frank W. Peirson 1670 Unknown Sierra Nevada Comment
  RSA69405  Delphinium nuttallianum F. W. Peirson 1926-6-22 6820 Shasta Trail to Devils Kitchen, Drakesbad, Lassen National Park Comment
  RSA69712  Mentzelia dispersa F. W. Peirson 1926-6-26 6899 Modoc Roadside, Alturas to Canby. 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
  RSA69739  Luzula parviflora F. W. Peirson 1923-7-11 3673 Humboldt About 3 miles north of Orick. Comment
  RSA69861  Juncus torreyi F. W. Peirson 1928-9-4 8186 Los Angeles about 1 mile above Pallett Creek Comment
  RSA70139  Triteleia laxa F. W. Peirson 1923-6-29 4096 Santa Cruz Along boulevard, Santa Cruz Mountains Comment
  RSA70142  Triteleia ixioides subsp. scabra F. W. Peirson 1908-7-10 1658 Tulare Tule River, Sierra Nevada. Comment
  RSA70148  Dichelostemma ida-maia F. W. Peirson 1926-7-12 7030 Humboldt W slope of Coast Range back of Orick. Comment
  RSA70155  Triteleia montana F. W. Peirson 1926-6-22 6823 Lassen Drakesbad, trail to Devils Kitchen, Lassen National Park. Comment
  RSA70232  Allium validum F. W. Peirson 1925-7-6 6297 El Dorado Lake of the Woods Trail from Fallen Leaf Lake. Sierra Nevada. Comment
  RSA70252  Allium obtusum var. obtusum Gertrude B. Peirson 1914-07 1650 Tuolumne Tuolumne Meadow region, Sierra Nevada. Comment
  RSA70280  Juncus covillei F. W. Peirson 1923-7-9 3666 Humboldt Humboldt County State Park on Eel River, northern California. Comment
  RSA70435  Floerkea proserpinacoides F. W. Peirson 1926-6-25 6888 Modoc Small side canyon 1 mile east of summit of Warner Mountains on Cedarville Road. Comment
  RSA70545  Euphorbia spathulata F. W. Peirson 1908-4-18 2037 Los Angeles Point Fermin Comment
  RSA70547  Chamaesyce albomarginata F. W. Peirson 1919-2-16 2038 Los Angeles Point Fermin. Comment
  RSA70552  Euphorbia crenulata F. W. Peirson 1923-7-8 3761 Mendocino Ten Mile Creek, about 5 miles upstream. Comment
  RSA71118  Calystegia malacophylla F. W. Peirson 1919-8-15 895 Tulare Trail from Redwood Meadow to Giant Forest, Sierra Nevada Comment
  RSA71856  Collomia heterophylla F. W. Peirson 1941-7-27 13096 Del Norte Elk Valley Forest Camp Comment
  RSA71888  Navarretia leptalea F. W. Peirson 1914-8-10 930 Fresno Warm Creek, tributary of San Joaquin River Comment
  RSA72145  Gayophytum eriospermum F. W. Peirson 1916-08 797 Tulare Tule River. Comment
  RSA72180  Epilobium hornemannii subsp. hornemannii F. W. Peirson 1914-08 2305 Madera Minaret Creek, Sierra Nevada Comment
  RSA72194  Oenothera californica subsp. californica F. W. Peirson 781 Los Angeles Los Angeles River, San Fernando Valley Comment
  RSA72235  Camissonia palmeri F. W. Peirson 1926-5-8 6727 Los Angeles 12 miles E of Palmdale, Antelope Valley Comment
  RSA72631  Wyethia helenioides F. W. Peirson 1926-8-10 6626 Contra Costa Tunnel Road to Walnut Creek. Comment
  RSA73027  Leptosiphon bicolor F. W. Peirson 1923-4-9 3428 Los Angeles San Clemente Island: Lemon Tank; north shore Comment
  RSA73083  Linanthus dichotomus subsp. dichotomus F. W. Peirson, Mabel Peirson 1926-4-3 6614 Lake 3.4 miles north of Middletown Comment
  RSA73304  Clarkia bottae F. W. Peirson 1929-5-18 8394 Santa Barbara Cuyama Valley Road, 13 miles east of Coast Boulevard. Comment
  RSA73347  Clarkia xantiana F. W. Peirson 1927-5-28 7302 Kern Kern River Road, 15 miles from Bakersfield. Comment
  RSA74957  Phacelia quickii F. W. Peirson 1925-7-8 6319 El Dorado Road down American River, Sierra Nevada. Comment
  RSA75122  Nemacladus longiflorus var. breviflorus F. W. Peirson 1918-6-4 220 -a Los Angeles Rubio Canyon wash, south face of San Gabriel Mountains. Comment
  RSA75364  Camissonia boothii subsp. desertorum F. W. Peirson 1914-8-26 794 Mono Volcanic Tableland, Owens Valley Comment
  RSA75384  Camissonia strigulosa F. W. Peirson 1951-5-13 344 Los Angeles Arroyo Seco, Pasadena. Comment
  RSA75525  Phacelia fremontii F. W. Peirson 1917-5-13 963 Los Angeles Near Little Rock, Mojave Desert. Comment
  RSA75797  Pholistoma auritum Mabel Peirson 1927-4-12 7130 Santa Barbara Lady s Harbor, Santa Cruz Island Comment
  RSA75871  Nemophila menziesii var. menziesii F. W. Peirson 1925-3-20 5544 Tulare Near Richgrove. Comment
  RSA76021  Nemophila parviflora var. parviflora F. W. Peirson 1923-7-7 3816 Mendocino Navarro River. 8 miles below Wendling. Comment
  RSA766128  Eriogonum nudum var. pubiflorum F. W. Peirson 1930-5-13 s.n. Kern About 3 miles southeast of Kernville. Comment
  RSA77419  Datisca glomerata F. W. Peirson 1904-8-28 122 Los Angeles Little Santa Anita Canyon, south base of San Gabriel Mts. Comment
  RSA77432  Apium graveolens F. W. Peirson 1923-06 819 Los Angeles Kewen Lake Canyon, Pasadena Comment
  RSA77770  Viola glabella F. W. Peirson 1926-6-22 6818 Unknown Trail from Devil's Kitchen, Lassen National Park. Comment
  RSA78640  Cryptantha confertiflora F. W. Peirson 1946-4-20 13543 Inyo Gray s Camp. Comment
  RSA79422A  Collinsia bartsiifolia var. davidsonii F. W. Peirson 1926-4-4 7089 Alameda Berkeley Hills, Crgmont Region Comment
  RSA79443  Collinsia bartsiifolia F. W. Peirson 1929-4-20 8315 Santa Barbara About 2 miles from Surf on the road to Lompoc. Comment
  RSA79886  Leucophysalis nana F. W. Peirson 1926-6-21 6796 Plumas Open flat strip along shore of Lake Almanor. Comment
  RSA79907  Solanum americanum F. W. Peirson 1936-4-7 11812 Inyo along the creek below Darwin Falls, Argus Range. Comment
  RSA79909  Solanum elaeagnifolium F. W. Peirson 1929-7-27 8566 Kern along the railroad track at south end of Mohave. Comment
  RSA79999  Amsinckia spectabilis F. W. Peirson 1925-3-25 5678 San Luis Obispo Morro. Comment
  RSA80102  Mimulus torreyi F. W. Peirson 1926-6-21 6800 Plumas Flat strip along shore of Lake Almanor (north shore). Comment
  RSA80134  Mimulus guttatus F. W. Peirson 1926-6-21 6775 Butte Butte Meadow, Humboldt Road. Comment
  RSA80173  Linaria vulgaris F. W. Peirson 1923-7-7 3846 Mendocino 2 miles below Wendling. Comment
  RSA80198  Penstemon speciosus F. W. Peirson 1911-8-7 1115 Inyo Little Cottonwood Creek, east slope of Sierra Nevada. Comment
  RSA80205  Plagiobothrys scouleri var. hispidulus F. W. Peirson 1914-8-25 999 Mono Crooked Creek, east of Sierra Nevarda Comment
  RSA80316  Lycium pallidum var. oligospermum F. W. Peirson 1928-4-4 7823 Inyo low table land about 15 mi. N of Trona. Comment
  RSA80365  Heracleum maximum F. W. Peirson 1923-7-7 3939 Mendocino Indian Creek Camp Comment
  RSA80367  Heracleum maximum F. W. Peirson 1914-8-15 807 Madera Devil s Post Pile, Sierra Nevada. Comment
  RSA80492  Mimulus primuloides var. pilosellus F. W. Peirson 1908-7-11 1140 Tulare Meadow Divide above Nelson, Sierra Nevada. Comment
  RSA80645  Hypericum concinnum Mabel Peirson 1926-5-31 2071 Marin Mt. Tamalpais Comment
  RSA80647  Boisduvalia glabella F. W. Peirson 1906-7-19 2083 Los Angeles Sink near Inglewood. Comment
  RSA80691  Boisduvalia densiflora var. densiflora F. W. Peirson 1908-7-9 2081 Tulare Tule River, Sierra Nevada. Comment
  RSA80704  Circaea alpina subsp. pacifica F. W. Peirson 1941-7-23 s.n. Mendocino Van Damme State Park. Near sea level. 0 Comment
  RSA80717  Grindelia camporum var. bracteosa F. W. Peirson 1920-7-30 2754 -A San Luis Obispo Willow Creek, Morro region. Comment
  RSA80766  Petunia parviflora F. W. Peirson 1092 Los Angeles Los Angeles River, Inglewood. Comment
  RSA80791  Pedicularis groenlandica F. W. Peirson 1908-7-10 1171 Tulare Tule River near Nelson, Sierra Nevada. Comment
  RSA81473  Castilleja wightii F. W. Peirson 1941-7-23 s.n. Mendocino Van Damme State Park Comment
  RSA82053  Cordylanthus rigidus subsp. rigidus F. W. Peirson 1908-7-9 1159 Tulare Tule River Comment
  RSA82551  Stachys albens F. W. Peirson 1925-8-10 6379 Mendocino Jug Handle Creek, 5 miles north of Mendocino City. Comment
  RSA83324  Dudleya lanceolata F. W. Peirson s.n. Los Angeles Altadena. Comment
  RSA83399  Monardella lanceolata var. lanceolata F. W. Peirson 1908-7-10 1074 Tulare Tule River near Nelson Comment
  RSA83450  Mentha canadensis F. W. Peirson 1926-7-12 7044 Humboldt Humboldt County: Orick Comment
  RSA83453  Mentha canadensis F. W. Peirson 1921-8-2 1076 Inyo Owens River, 2 miles north of Lone Pine. Comment
  RSA84213  Sedum stenopetalum subsp. stenopetalum F. W. Peirson 1926-6-25 6866 Modoc West slope of Warner Mountains on Cedarville Road. Comment
  RSA84289  Equisetum hyemale var. affine F. W. Peirson 1532 Los Angeles Benedicts Canyon, Santa Monica Mts Comment
  RSA84324  Tellima grandiflora F. W. Peirson 1923-7-7 3739 Mendocino Just below Wendling. Comment
  RSA84954  Ribes divaricatum F. W. Peirson 1925-3-25 5682 San Luis Obispo North of Morro Comment
  RSA84992  Adiantum jordanii F. W. Peirson 1934-3-29 11089 Santa Barbara Santa Cruz Island. Top of sea-bluffs west of Inlet, Frye's Harbor. Comment
  RSA85016  Polypodium californicum F. W. Peirson 1923-4-9 3441 Los Angeles north slope about 4 miles southeast of Wilson's Cove, San Clemente Island Comment
  RSA85170  Ephedra californica F. W. Peirson 1938-4-12 12381 San Luis Obispo Cuyama Valley in extreme southeast corner of San Luis Obispo County Comment
  RSA85198  Typha domingensis F. W. Peirson 1924-8-29 5075 Orange 3 miles from Balboa Beach. Comment
  RSA85211  Horkelia tridentata F. W. Peirson 1908-7-23 1964 Tulare Sequoia National Park, Sierra Nevada Comment
  RSA85224  Horkelia fusca subsp. tenella F. W. Peirson 1926-6-21 6794 Plumas South shore Lake almanor, Comment
  RSA85295  Ranunculus sceleratus var. multifidus F. W. Peirson 1926-6-26 6904 Modoc Alturas to Canby Comment
  RSA85297  Ranunculus occidentalis var. ultramontanus F. W. Peirson 1925-7-1 6171 Contra Costa Wood borders, State Line, Lake Tahoe Comment
Read comments
Feb 10 2013
  RSA85299  Ranunculus occidentalis var. eisenii F. W. Peirson 1926-4-2 6593 Lake 3 miles east of Kelseyville on road to Lower Lake Comment
  RSA85727  Potentilla drummondii F. W. Peirson 1908-7-24 1981 Tulare North Fork of Tule River, Sierra Nevada. Comment
  RSA86689  Leymus triticoides F. W. Peirson 1924-7-1 4678 San Bernardino Woods along river north of Bridge, Santa Ana River. Comment
  RSA86808  Sorbus californica F. W. Peirson 1912-6-29 1989 Santa Cruz State Park. Santa Cruz Mtns. Comment
Read comments
Nov 11 2012
  RSA86831  Rubus ursinus F. W. Peirson 1929-5-17 8378 Santa Barbara Grade beyond Bear Creek, 2 miles south of Surf. Comment
  RSA86948  Lupinus sparsiflorus subsp. sparsiflorus F. W. Peirson 1917-5-12 2432 Los Angeles County public camp ground in Mint Canyon, northwest corner of San Gabriel Mts. Comment
  RSA87071  Lupinus densiflorus var. lacteus F. W. Peirson 1933-7-9 10679 Kern On road from Caliente to Bodfish, about 6 miles north of the former Comment
  RSA87082  Lupinus nanus subsp. menkerae F. W. Peirson 1938-4-12 12388 Kern From fields of Lupine along first level stretch north of grade, at Arvin Cutoff, south of Bakersfield, Kern County. Comment
  RSA87234  Lupinus culbertsonii subsp. hypolasius F. W. Peirson 1917-8-14 532 Fresno Dusey Creek, Middle Fork of Kings River, Sierra Nevada. Comment
  RSA88693  Carex bolanderi F. W. Peirson 1932-7-7 10261 Humboldt Willow Creek, a few miles above the town of that name. Comment
  RSA90078  Lotus argophyllus var. argophyllus F. W. Peirson 1928-4-21 7867 San Diego Junction of Grapevine Canyon and San Felipe Creek, eastern San Diego County. Comment
  RSA90155  Astragalus didymocarpus var. didymocarpus F. W. Peirson 1903-3-28 2345 Los Angeles Benedict's Canyon, Santa Monica Mountains. Comment
  RSA90157  Astragalus didymocarpus var. didymocarpus F. W. Peirson 1918-5-5 581 Los Angeles West foot of Santa Susanna Grade, Simi Valley. Comment
  RSA90159  Astragalus didymocarpus var. dispermus F. W. Peirson 1918-03 579 Riverside Coachella Valley, field near Indio. Comment
  RSA90219  Astragalus bolanderi F. W. Peirson 1908-7-23 4142 Tulare South Fork of Kaweah River Comment
  RSA90227  Astragalus douglasii var. perstrictus F. W. Peirson 1925-5-15 5896 San Diego 10 miles northwest of Jacumba Comment
  RSA90238  Astragalus gilensis F. W. Peirson 1916-8-30 2001 Kern near Bakerfield. Comment
  RSA90245  Astragalus layneae F. W. Peirson 1922-5-14 3011 San Bernardino 10 miles N of Barstow. Comment
  RSA90300  Lotus hamatus F. W. Peirson 1926-4-30 6696 San Diego About 1 mile from Pala on the road to Henshaw Dam Comment
  RSA90364  Lotus heermannii F. W. Peirson 1923-7-27 3607 Monterey Monterey 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
  RSA90442  Astragalus kentrophyta var. danaus F. W. Peirson 1910-7-26 595 Tuolumne Mt. Dana, Seirra nevada, Tuolumne Co. California Comment
  RSA90455  Lathyrus jepsonii subsp. californicus F. W. Peirson 1908-7-9 2009 Tulare Tule River, Sierra Nevada. Comment
  RSA90457  Lathyrus torreyi F. W. Peirson 1923-6-29 3628 Santa Cruz Santa Cruz Mts. Comment
  RSA90459  Lathyrus sulphureus F. W. Peirson 1908-7-10 s.n. Tulare Tule River, Sierra Nevada. Comment
  RSA90641  Astragalus palmeri F. W. Peirson 1928-4-20 7850 San Diego Upper end of Sentenac Canyon, San Felipe Creek. Comment
  RSA90707  Astragalus trichopodus var. lonchus F. W. Peirson 1927-4-19 7253 San Diego Headland South of Torrey Pines Comment
  RSA90709  Astragalus trichopodus var. lonchus F. W. Peirson 1908-4-18 7695 Los Angeles Point Fermin Comment
  RSA90724  Astragalus purshii var. tinctus F. W. Peirson 1922-5-13 2976 San Bernardino Granite Wells, Mojave Desert. Comment
  RSA90744  Astragalus magdalenae var. peirsonii F. W. Peirson 1927-4-15 7194 Imperial Lower part of dunes west of Yuma. Comment
  RSA91139  Trifolium monanthum subsp. grantianum F. W. Peirson 1924-7-14 4950 San Bernardino Lost Creek, San Bernardino Mts. Comment
  RSA91148  Euthamia occidentalis F. W. Peirson 1924-8-31 5106 San Bernardino South of Victorville. Comment
  RSA91155  Lessingia glandulifera var. peirsonii F. W. Peirson 1927-5-29 7331 Kern 10 miles north of Red Rock canyon, Indian Wells Valley, Western Mojave Desert. Comment
  RSA91157  Lessingia glandulifera var. glandulifera F. W. Peirson 1924-8-31 5099 San Bernardino On road to Phelan N of Cajon Pass, Comment
  RSA91201  Lupinus excubitus var. hallii F. W. Peirson 1923-3-23 4424 San Bernardino 1 mile east of Mentone. Comment
  RSA91204  Lupinus formosus var. formosus F. W. Peirson 1907-7-7 3 Los Angeles pine Flats Comment
  RSA91215  Krameria grayi F. W. Peirson 1927-4-16 7216 Imperial Foot of Mountain Springs Grade, Western Imperial County Comment
  RSA91260  Lupinus latifolius subsp. latifolius F. W. Peirson, Mabel B. Peirson 1926-4-2 6565 Mendocino Near foot of Hopland Grade. Comment
  RSA91306  Vicia americana F. W. Peirson 1907-7-9 2016 Los Angeles East Fork of Alder Creek, San Gabriel Mts Comment
  RSA91364  Medicago lupulina F. W. Peirson 1906-8-12 547 San Bernardino Mill Creek Canyon, San Bernardino Mts. Comment
  RSA91381  Linum angustifolium F. W. Peirson 1923-7-8 5309 Mendocino Neglected yard, Mendocino City. Comment
  RSA91435  Psorothamnus polydenius F. W. Peirson 1925-6-25 6029 Inyo 10 miles N of Independence Comment
  RSA91437  Psorothamnus schottii F. W. Peirson 1927-4-16 7215 Imperial Foot of Mountain Springs Grade, Western Imperial County Comment
  RSA91442  Trifolium gracilentum var. palmeri F. W. Peirson 1923-4-12 3436 Los Angeles Wilson's Cove, San Clemente Island. Comment
  RSA91504  Trifolium ciliolatum F. W. Peirson 1903-4-9 552 Los Angeles Shorb, Los Angeles County Comment
  RSA91515  Poa secunda F. W. Peirson 1918-04 1550 Los Angeles Arroyo Seco above Devil's Gate, West of Pasadena Comment
  RSA91517  Poa secunda F. W. Peirson 1919-4-12 1551 Riverside Tahquitz canyon near Palm Springs. Comment
  RSA91525  Digitaria sanguinalis F. W. Peirson 1917-09 1592 Los Angeles At 1085 New York Drive, Altadena Comment
  RSA91545  Trifolium dichotomum F. W. Peirson 1926-4-3 6608 Lake 3.3 miles north of Middletown. Comment
  RSA91549  Trifolium depauperatum F. W. Peirson, Mabel B. Peirson 1926-4-2 6589 Lake West end of Clear Lake. Comment
  RSA91558  Trifolium breweri F. W. Peirson 1926-6-21 6770 Butte Butte Meadow, Humboldt Road. Comment
  RSA91560  Trifolium breweri F. W. Peirson 1941-7-27 13105 Del Norte About 10 miles below Patricks Camp. Comment
  RSA91580  Schoenoplectus maritimus F. W. Peirson 1918-03 1618 Riverside Mecca. Comment
  RSA91591  Carex buxbaumii F. W. Peirson 1940-8-19 12946 Inyo Rock Creek Basin, northern Inyo Co., defile cutting across lower part of Transverse Ridge. Comment
Read comments
Dec 19 2011
  RSA91624  Trisetum spicatum F. W. Peirson 1930-8-5 9103 Inyo Gorge east of Mono Pass, Rock Creek Lake Basin, northern Inyo County. Comment
  RSA91695  Gnaphalium palustre F. W. Peirson 1315 Los Angeles Sink at Inglewood. Comment
  RSA91709  Gnaphalium beneolens F. W. Peirson 1925-10-3 6451 Marin Near south foot of Mt. Tamalpais Comment
  RSA91714  Pseudognaphalium californicum F. W. Peirson 1929-5-17 8375 Santa Barbara On sand dunes at Surf. Comment
  RSA91975  Hierochloe occidentalis F. W. Peirson 1923-6-27 s.n. Monterey Seventeen Mile Drive Comment
  RSA92117  Carex nebrascensis F. W. Peirson 1935-7-28 11716 Alpine Foot of Red Lake. Comment
  RSA92127  Eleocharis parishii F. W. Peirson 1930-5-31 8911 Los Angeles Below Lovejoy Dam, Lovejoy Buttes, southwestern Mojave Desert. Comment
  RSA92138  Eleocharis quinqueflora F. W. Peirson 1937-8-3 s.n. Inyo Above Long Lake, Rock Creek Lake Basin. Comment
  RSA92160  Scirpus diffusus F. W. Peirson 1926-6-21 6769 Butte Butte Meadow, Humboldt Road. Comment
  RSA92163  Schoenoplectus californicus F. W. Peirson 1918-4-28 1612 Los Angeles Road east and south of El Monte. Comment
  RSA92180  Layia platyglossa subsp. platyglossa F. W. Peirson 1927-4-12 7135 Santa Barbara Santa Cruz Island. Lady's Harbor, Comment
  RSA92183  Layia jonesii F. W. Peirson 1925-3-25 5687 San Luis Obispo Between Morro and San Luis Obispo Comment
  RSA92186  Lagophylla ramosissima F. W. Peirson 1358 Los Angeles Montana St. Pasadena Comment
  RSA92191  Amblyopappus pusillus Mabel Peirson 1922-4-7 1392 Los Angeles San Pedro. Comment
  RSA92212  Palafoxia arida var. arida F. W. Peirson 1914-04 1381 Riverside Whitewater at head of Coachella Valley. Comment
  RSA92218  Pectis papposa F. W. Peirson 1938-11-12 92218 Imperial Along boilevard to Imperial Valley directly opposite the road to Mecca. 0 Comment
Read comments
Feb 20 2013
  RSA92222  Perityle emoryi F. W. Peirson 1907-7-1 1368 Los Angeles Catalina Island. Comment
  RSA92257  Layia platyglossa subsp. campestris F. W. Peirson 1923-4-9 3430 Los Angeles San Clemente Island: Wilson's Cove Comment
  RSA92379  Psilocarphus tenellus F. W. Peirson 1918-5-5 1303 Los Angeles Brents on the Malibu, Santa Monica Mountains. Comment
  RSA92417  Coreopsis bigelovii F. W. Peirson s.n. Los Angeles Benedicts Canyon, Santa Monica Mts Comment
  RSA92445  Panicum urvilleanum F. W. Peirson 1922-5-14 2965 San Bernardino along bank north of railroad tracks, Barstow Comment
  RSA92447  Echinochloa muricata var. microstachya F. W. Peirson 1920-7-28 2216 Santa Barbara Canada del Refugio, at sea level. 0 Comment
  RSA92483  Helianthus cusickii F. W. Peirson 1926-6-26 6902 Modoc between Alturas and Canby Comment
  RSA92486  Helianthus niveus subsp. tephrodes F. W. Peirson 1927-4-15 7197 Imperial Sand dunes west of Yuma. Comment
  RSA92512  Rudbeckia californica F. W. Peirson 1914-8-13 1324 Fresno Fish Creek tributary to San Joaquin River, Sierra Nevada. Comment
  RSA92518  Verbesina encelioides subsp. exauriculata F. W. Peirson 1923-6-25 3898 Ventura On Calabasas Road, 10 miles east of Ventura Comment
  RSA92528  Bahiopsis parishii F. W. Peirson 1930-4-16 8748 San Bernardino about 10 miles north of Goffs on Cima Road, eastern San Bernardino Co. Comment
  RSA92535  Eriophyllum staechadifolium var. depressum F. W. Peirson 1934-3-28 11079 Santa Barbara Santa Cruz Island. Diablo Canyon, about 1 mile west of Frye's Harbor Comment
  RSA92537  Eriophyllum staechadifolium F. W. Peirson 1912-1 1385 Monterey Monterey Comment
  RSA92631  Monolopia lanceolata F. W. Peirson 1929-5-18 8401 San Luis Obispo Cuyama Valley Road, ca. 62 miles east of the Coast Boulevard Comment
  RSA92670  Eriophyllum lanatum var. grandiflorum F. W. Peirson 1926-6-21 6766 Butte About 10 miles east of Chico on Humboldt Road Comment
  RSA92673  Eriophyllum lanatum var. achilleoides F. W. Peirson 1923-7-13 3913 Del Norte 7 miles N of Gasquet. Comment
  RSA92676  Eriophyllum lanatum var. arachnoideum F. W. Peirson 1926-7-12 7029 Humboldt West slope of Coast Range back of Orick. Comment
  RSA92840  Hemizonia arida F. W. Peirson 1927-5-29 7337 Kern Red Rock Canyon, Southwestern Kern County Comment
  RSA92846  Madia madioides F. W. Peirson 1923-6-29 5283 Santa Cruz Along boulevard, Santa Cruz Mountains Comment
  RSA92869  Urtica urens F. W. Peirson 1919-10 1713 Los Angeles weed in Altadena. Comment
  RSA92900  Madia madioides F. W. Peirson 1941-7-23 13083 Mendocino About 2 miles back from beach, Van Damme State Park Comment
  RSA92990  Lasthenia coronaria F. W. Peirson 1912-03 s.n. Los Angeles Rubio Wash, south base of San Gabriel Mountains Comment
  RSA93017  Lasthenia minor F. W. Peirson 1925-3-19 5519 Kern Caliente Creek near foot of Tehachapi Grade. Comment
  RSA93086  Pluchea odorata F. W. Peirson 1924-8-24 5093 Los Angeles Road from Artesia to Hungtington Beach. Comment
  RSA93200  Baccharis salicifolia F. W. Peirson 1926-4-1 6557 Mendocino Banks of Russian River, Hopland Comment
  RSA93203  Baccharis salicifolia F. W. Peirson 1924-12-3 5384 Los Angeles San Gabriel Wash at Foothill Boulevard, Azusa. Comment
  RSA93206  Baccharis salicifolia F. W. Peirson 1904-9-5 s.n. Los Angeles Verdugo Canyon, Verdugo Mountains 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
  RSA93315  Aster breweri F. W. Peirson 1931-8-7 9522 El Dorado Near Grass Lake, Glen Alpine Creek Basin Comment
  RSA93319  Heterotheca oregona var. rudis F. W. Peirson 1926-7-13 7051 Humboldt Near Blue Lake, Mad River Comment
  RSA93325  Xylorhiza cognata F. W. Peirson 1927-4-13 7258 Riverside Painted Canyon, near Mecca Comment
  RSA93327  Xylorhiza cognata F. W. Peirson 1927-4-12 7159 Riverside Painted Canyon, near Mecca Comment
  RSA93332  Kelloggia galioides F. W. Peirson 1923-7-19 4501 Siskiyou 16 miles S of Bray. Comment
  RSA93345  Xylorhiza tortifolia F. W. Peirson 1926-4-26 6662 Los Angeles 5 miles west of Rock Creek, Mohave Desert. Comment
  RSA93347  Xylorhiza tortifolia F. W. Peirson 1917-5-13 1269 San Bernardino West of Victorville. Comment
  RSA93352  Aster bernardinus F. W. Peirson 1924-8-29 5065 Orange roadside 4 miles south of Santa Ana. Comment
  RSA93388B  Symphoricarpos mollis F. W. Peirson 1923-6-27 3864 Monterey Redwood Creek at Notrey's [Notley's] Landing. Comment
  RSA93669  Antennaria argentea F. W. Peirson 1908-7-10 1305 Tulare Tule River, Sierra Nevada. Comment
  RSA93685  Ambrosia psilostachya F. W. Peirson 1919-11-15 1318 Los Angeles East Villa St. near Allen St. Pasadena. Comment
  RSA93716  Brickellia arguta var. odontolepis F. W. Peirson 1928-4-20 7851 San Diego canyon of San Felipe Creek, Sentenac Canyon, E San Diego Co. Comment
  RSA93723  Ageratina occidentalis F. W. Peirson 1926-7-13 7052 Humboldt Near Blue Lake, Mad River Comment
  RSA93743  Aster subulatus var. ligulatus F. W. Peirson 1924-10-19 5240 Orange Wintersberg Comment
  RSA93746  Aster radulinus F. W. Peirson 1923-7-10 3881 Humboldt Garberville. Comment
  RSA93765  Geraea canescens F. W. Peirson 1918-03 1333 Riverside Irrigated field near Indio. Comment
  RSA93767  Geraea canescens F. W. Peirson 1921-3-23 2782 Riverside 10 miles SE of Palm Spring Comment
Read comments
Apr 21 2011
  RSA93769  Helianthus niveus subsp. canescens F. W. Peirson 1918-03 1329 Riverside Irrigated field near Indio. Comment
  RSA93831  Chaenactis carphoclinia var. carphoclinia F. W. Peirson 1927-5-30 7343 Kern Petrified Forest Canyon, Western Mojave Desert. Comment
  RSA93870  Helenium puberulum F. W. Peirson 1920-7-29 3210 San Luis Obispo 1 mile S of Pismo Beach. Comment
  RSA93918  Xanthium strumarium F. W. Peirson 1920-8-1 2237 Ventura 6 miles west of Ventura 0 Comment
  RSA93928  Ambrosia dumosa F. W. Peirson 1920-2-16 1319 Riverside Colorado Desert. Garden of Eden east of Palm Springs. Comment
  RSA93935  Ambrosia acanthicarpa F. W. Peirson 1919-10-26 271 Los Angeles Rubio Reservoir, south base of San Gabriel Mts. Comment
  RSA93955  Hymenoclea salsola F. W. Peirson 1927-4-17 7232 San Diego Summit of Mountain Springs Grade. Comment
  RSA93957  Hymenoclea salsola F. W. Peirson 1914-04 2494 Riverside Whitewater at head of Coachella Valley. Comment
  RSA93959  Pyrrocoma uniflora var. uniflora F. W. Peirson 1914-8-25 1241 Mono Crooked Creek, Northern part of Volcanic Tableland Comment
  RSA94086  Psathyrotes ramosissima F. W. Peirson 1918-03 1426 Riverside Between Palm Springs and Indio. Comment
Read comments
Feb 22 2009
  RSA94175  Hemizonia clementina F. W. Peirson 1923-4-9 3459 Los Angeles 2 miles SE of Wilson's Cove, San Clemente Island. Comment
Read comments
May 29 2013
  RSA94177  Hemizonia lutescens F. W. Peirson 1925-10-3 6457 Marin Trail along N foot of Mt. Tamalpais. Comment
  RSA94179  Hemizonia luzulifolia F. W. Peirson, Mabel Peirson 1920-7-30 2232 San Luis Obispo Near Morro. Comment
  RSA94366  Madia elegans F. W. Peirson 1925-8-10 6412 Mendocino Grade down to the stream at Albion Comment
  RSA94380  Eastwoodia elegans F. W. Peirson 1929-5-18 8405 Kern a sonsiderable colony on rolling hills on lower part of grade on N slope of Tehachapi Pass. Comment
  RSA94383  Dyssodia cooperi F. W. Peirson 1922-5-12 2986 San Bernardino 3 miles SW of Barstow on the Victorville Rd. Comment
  RSA94561  Senecio californicus F. W. Peirson 1928-4-20 7857 San Diego San Felipe creek near foot of Sentenac Canyon , eastern San Diego Co. Comment
  RSA94613  Syntrichopappus fremontii F. W. Peirson 1928-4-2 7806 Inyo 18 miles north of Ryan, Death Valley region. Comment
  RSA94616  Trichoptilium incisum F. W. Peirson 1927-4-14 7189 Imperial Canyon near east end of Santa Rosa Mountains, 8 miles from Imperial Valley Boulevard. Comment
  RSA94620  Venegasia carpesioides F. W. Peirson 1925-3-26 5716 Santa Barbara El Capitan Camp, on seashore northwest of Santa Barbara Comment
  RSA94623  Whitneya dealbata F. W. Peirson 1926-6-23 6833 Shasta Trail to summit of Lassen Peak, Lassen National Park Comment
  RSA94665  Senecio mohavensis F. W. Peirson 1927-4-12 7156 Riverside In Painted Canyon near Mecca. Comment
  RSA94669  Senecio douglasii var. monoensis F. W. Peirson 1927-5-8 7294 San Bernardino Half way between Victorville and Barstow. Comment
  RSA94685  Senecio lyonii F. W. Peirson 1923-4-12 3478 Los Angeles Wilson's Cove, San Clemente Island. Comment
  RSA94687  Senecio aphanactis F. W. Peirson 1934-3-25 11033 Santa Barbara Santa Cruz Island. West of Fryes Harbor Comment
  RSA94713  Senecio flaccidus var. douglasii F. W. Peirson 1924-6-26 4875 San Diego Laguna Mountains. Lower part of Vallecito Canyon. Comment
  RSA94831  Trixis californica F. W. Peirson 1928-3-24 7745 San Diego San Felipe Creek, 2 miles below Sentenac Canyon, eastern SD county. Comment
  RSA94834  Centaurea solstitialis F. W. Peirson 1923-7-20 3929 Tehama Red Bluff Comment
  RSA94870  Arnica nevadensis F. W. Peirson 1925-7-5 6276 El Dorado Near summit of Mt. Tallac, Sierra Nevada Comment
  RSA94898  Arnica amplexicaulis F. W. Peirson 1914-8-16 1417 Madera Minaret Creek, Sierra Nevada Comment
  RSA94955  Malacothrix saxatilis var. tenuifolia F. W. Peirson 1919-11-8 1482 Orange Aliso Creek. 0 Comment
  RSA95000  Agoseris glauca var. dasycephala F. W. Peirson 1926-6-25 6884 Modoc Small side canyon 1 mile east of summit of Warner Mountains on Cedarville Road. Comment
  RSA95061  Rafinesquia neomexicana F. W. Peirson 1920-2-16 2762 Riverside Garden of Eden at Palm Springs Comment
  RSA95081  Microseris douglasii subsp. platycarpha F. W. Peirson 1908-4-18 1464 Los Angeles Point Fermin. Comment
  RSA95090  Calycoseris wrightii F. W. Peirson 1935-4-18 11490 San Bernardino Copper basin creek, Whipple Mtns., eastern San Bernardino county Comment
  RSA95093  Calycoseris parryi F. W. Peirson 1917-5-14 1484 San Bernardino Cajon Pass. Comment
  RSA95096  Calycoseris parryi F. W. Peirson 1930-4-14 8706 San Bernardino About 3 miles north of Cave Spring. Comment
  RSA95128  Glyptopleura setulosa F. W. Peirson 1926-4-27 6673 San Bernardino Near Llano Comment
  RSA95139  Crepis intermedia F. W. Peirson 1926-6-25 6873 Modoc Summit of grade, Cedarville Pass, Warner Mountains. Comment
  RSA95201  Sidalcea calycosa subsp. rhizomata F. W. Peirson 1923-7-7 3773 Mendocino 1 mile north of Navarro River Comment
  RSA95225  Stephanomeria cichoriacea F. W. Peirson 1918-9-15 249 Los Angeles Lukens Peak trail, San Gabriel Mountains. Comment
  RSA95252  Taraxacum laevigatum F. W. Peirson 1924-6-25 4836 San Diego Laguna Lakes Region, Laguna Mountains. Comment
  RSA95266  Sidalcea oregana subsp. spicata F. W. Peirson 1923-7-11 3778 Humboldt Along road 7 miles north of Arcata. Comment
  RSA95300  Hibiscus denudatus F. W. Peirson 1928-3-24 7734 San Diego San Felipe Creek, Sentenac Canyon, eastern San Diego Co. Comment
  RSA95303  Rhamnus californica subsp. occidentalis F. W. Peirson 1923-7-13 3764 Del Norte 4 miles north of Gasquet. Comment
  RSA95306  Rhamnus pirifolia F. W. Peirson 1934-3-28 11082 Santa Barbara Santa Cruz Island. Diablo Canyon, about 1 mile west of Frye's Harbor Comment
  RSA95372  Sidalcea malviflora subsp. malviflora F. W. Peirson 1923-6-27 3780 Monterey Monterey coast. Comment
  RSA95381  Sidalcea malviflora subsp. nana F. W. Peirson 1923-7-13 3775 Del Norte 4 miles northeast of Gasquet. Comment
  RSA95393  Ceanothus verrucosus F. W. Peirson 734 San Diego Torrey Pines, coast of San Diego Comment
  RSA95396  Ceanothus foliosus F. W. Peirson, Mabel Peirson 1926-4-2 6571 Lake Hopland Grade Comment
  RSA97149  Lomatium marginatum F. W. Peirson 1926-4-3 6607 Lake 3.3 mi N of Middletown. Comment
  RSA97375  Sanicula bipinnatifida F. W. Peirson 1925-3-23 5645 Fresno On road from Coalinga to Parkfield Comment
  RSA97377  Sanicula bipinnatifida F. W. Peirson s.n. Los Angeles hills near Shorb, Los Angeles Co. Comment
  RSA97379  Sanicula bipinnata F. W. Peirson 2795 Los Angeles Santa Monica, Los Angeles. Comment
  RSA97404  Torilis nodosa F. W. Peirson 1923-7-8 s.n. Mendocino Ten-Mile River, about 5 miles from mouth Comment
  RSA97417  Tauschia parishii F. W. Peirson 1926-5-1 6710 San Diego open places about the summit of Palomar Mountain. Comment
  RSA97419  Tauschia arguta F. W. Peirson 1908-05 134 Los Angeles Eaton Canyon at south base of mountains. Comment
  RSA97425  Ligusticum grayi F. W. Peirson 1939-8-13 12887 Alpine Frog Lake, Woods Lake Region, Sierra Nevada, Alpine County Comment
  RSA97429  Arceuthobium campylopodum F. W. Peirson 1909-08 1721 San Bernardino South Fork of Santa Ana River. Comment
  RSA97432  Lomatium mohavense subsp. mohavense F. W. Peirson 1926-4-26 6655 -a Los Angeles about 1 mile east of Palmdale Comment
  RSA97447  Phoradendron pauciflorum F. W. Peirson 1909-08 1718 San Bernardino on Abies concolor; South Fork of Santa Ana River. Comment
  RSA97463  Perideridia parishii subsp. latifolia F. W. Peirson 817 Los Angeles Laurel Canyon, Santa Monica Mts. Comment
  RSA97466  Perideridia kelloggii F. W. Peirson 1925-8-8 6343 Sonoma 5 miles south of Santa Rosa Comment
  RSA97813  Ligusticum californicum F. W. Peirson 1923-7-13 3944 Del Norte 10 miles northeast of Gasquet Comment
  RSA98325  Oenanthe sarmentosa F. W. Peirson 1923-7-7 3941 Mendocino Navarro River within one mile of ocean Comment
  RSA991825  Cenchrus echinatus F. W. Peirson 1922-4-12 2913 Imperial 28 miles south of Coachella. Comment
  RSA99354  Symphoricarpos vaccinioides F. W. Peirson 1932-7-11 10225 Shasta Forest borders about the lakes, Thousand-Lake Basin. Comment
  SD87628  Wyethia mollis Frank W. Peirson 1925-6-26 6089 Mono Northern part of Volcanic Tableland Comment
  SD87656  Trifolium dichotomum Frank W. Peirson 1926-4-2 6579 Lake 0.5 miles south of Clear Lake, open roadside Comment
  SD87658  Crepis monticola Frank W. Peirson 1926-6-22 6829 Lassen Lassen National Park Comment
  SD87685  Allium peninsulare Frank W. Peirson 1923-5-21 Los Angeles San Gabriel Mountains, Fish Canyon. Comment
  SD87711  Castilleja exserta subsp. latifolia Frank W. Peirson 1936-7-15 11834 Marin Point Reyes, open sea bluffs near the lighthouse Comment
  SD87744  Chaenactis carphoclinia Frank W. Peirson 1927-5-30 7343 Kern At Petrified Forest Comment
  SD87876  Eriogonum fasciculatum var. fasciculatum F. W. Peirson 1924-2-10 4527 Unknown Corona del Mar, back from beach Comment
Read comments
Dec 18 2011
  SEINET10463313  Campanula prenanthoides Frank W. Peirson 1926-7-11 Peirson 7023 Siskiyou HALF WAY UP GRADE, GRADE W OF ETNA OR ETNA MILLS Comment
  SEINET10840483  Heterocodon rariflorum Frank W. Peirson 1921-6-14 Peirson 1210 Los Angeles TRAIL FORK OF SAN GABRIEL RIVER 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
  SEINET12057104  Calochortus invenustus F. Peirson, Peirson, M. 1908-1 s.n. Tulare Sierra Nevada, Volcano Creek [Volcanic?] Comment
  UC908166  Navarretia intertexta Frank W. Peirson 1925-1-1 El Dorado s side Lake Tahoe; Sierra Nevada Comment
  RSA84589  Heuchera micrantha var. diversifolia F. W. Peirson 1937-7-19 12096 Monterey Along trail up the river at 100-200ft, Big Sur River 30 Comment
  RSA77813  Pholisma sonorae Mabel Peirson 1932-3-21 9781 Imperial Holtville to Yuma Rd. 61 Comment
  RSA90378  Lotus strigosus F. W. Peirson 1934-3-25 11027 Santa Barbara West of canyon to Frye's Harbor, Santa Cruz Island. 61 Comment
  POM17780  Verbena menthifolia F. W. Peirson 1923-3-27 3379 San Diego Otay Creek. 76 Comment
  RSA93687  Ambrosia confertiflora F. W. Peirson 1932-9-4 10460 San Diego 3 miles east of Chula Vista. 76 Comment
  RSA95006  Malacothrix glabrata F. W. Peirson 1928-4-20 8662 San Diego Borrego Valley, 1 mile E of entrance to Palm Canyon Park, Colorado Desert. 76 Comment
  RSA65740  Sesuvium verrucosum F. W. Peirson 1924-5-31 4655 Orange Laguna Canyon, near Laguna Beach 106 Comment
  SD87554  Cuscuta campestris Frank W. Peirson 1932-11-26 9659 Riverside Just south of Palm Grove, 1000 Palms. 120 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
  UC501518  Tidestromia oblongifolia Frank W. Peirson 1924-12-30 5416 Riverside 1000-Palms. North of the Palm Grove. 121 Comment
  POM48555  Asclepias subulata F. W. Peirson 1924-12-30 5420 Riverside Thousand-Palms Canyon, north side of Coachella Valley. 122 Comment
  RSA65363  Atriplex canescens var. laciniata F. W. Peirson 1924-12-30 s.n. Riverside Thousand Palms Canyon, Coachella Valley. 122 Comment
  RSA69622  Juncus acutus subsp. leopoldii F. W. Peirson 1924-12-30 5409 Riverside Thousand-Palms Canyon, north side of Coachella Valley. 122 Comment
  RSA70006  Tidestromia oblongifolia subsp. oblongifolia F. W. Peirson 1924-12-30 5416 Riverside Thousand-Palms Canyon, Colorado Desert 122 Comment
  RSA79829  Keckiella antirrhinoides F. W. Peirson 1922-5-18 3027 Orange Santa Ana River. 122 Comment
  RSA86723  Aristida adscensionis F. W. Peirson 1932-3-21 9786 Imperial 3 mi. north of Ogilby. 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
  RSA91217  Krameria grayi F. W. Peirson 1932-3-21 9785 Imperial 3 mi. north of Ogilby. 122 Comment
  RSA91372  Psorothamnus emoryi F. W. Peirson 1924-12-30 5417 Riverside Thousand-Palms Canyon, Colorado Desert 122 Comment
  RSA92101  Cyperus laevigatus F. W. Peirson 1924-12-30 5405 Riverside Thousand-Palms Canyon, Colorado Desert 122 Comment
  RSA93922  Dicoria canescens F. W. Peirson 1924-12-30 5425 Riverside Thousand-Palms Canyon, edge of Coachella Valley. 122 Comment
  RSA95204  Microseris heterocarpa F. W. Peirson 1923-3-28 3393 San Diego 6 miles North of San Diego 122 Comment
  CAS-BOT-BC177824  Astragalus curtipes Frank W. Peirson 1925-3-25 5675 San Luis Obispo Morro Creek 152 Comment
  POM47667  Leymus triticoides F. W. Peirson 1924-6-1 4678 Riverside River lands along Santa Ana River. 152 Comment
  RSA80320  Hydrocotyle ranunculoides F. W. Peirson 1920-6-22 2168 San Bernardino Chino Creek 152 Comment
  RSA80326  Hydrocotyle umbellata F. W. Peirson 1920-6-22 814 San Bernardino Chino Creek 152 Comment
  RSA80387  Daucus carota F. W. Peirson 1920-6-22 2188 Los Angeles Roadside near Chino Creek, southeastern Los Angeles 152 Comment
  RSA82234  Castilleja affinis F. W. Peirson 1923-3-25 3376 Orange Aliso Canyon, near Laguna Beach. 152 Comment
  RSA82985  Stachys bullata F. W. Peirson 1925-3-25 5676 San Luis Obispo Morro Creek. 152 Comment
  RSA83931  Ranunculus californicus F. W. Peirson 1922-4-28 4305 San Bernardino Chino Creek, south of Chino 152 Comment
  RSA84220  Dudleya multicaulis F. W. Peirson 1922-5-18 3071 Orange Santa Ana River Canyon 152 Comment
Read comments
Apr 1 2009
  RSA87368  Muhlenbergia microsperma F. W. Peirson 1932-3-22 9805 Imperial Midway Well. 152 Comment
  UC635494  Calandrinia ambigua Frank W. Peirson 1926-2-22 6512 Riverside rocky hills along summits 1000-Palm Canyon 152 Comment
  UC908900  Gilia stellata Frank W. Peirson 1932-3-22 9803 Imperial Midway Well Midway Well (eastern Imperial County) 152 Comment
  UCR129700  Zigadenus venenosus F. W. Peirson 1923-3-26 4102 San Diego South Coast, southward from Torrey Pines 152 Comment
  RSA68977  Plantago bigelovii subsp. californica F. W. Peirson 1925-3-26 5709 Santa Barbara Between La Purisima Mission and Buellton. 152 Comment
  RSA69409  Delphinium parryi subsp. blochmaniae F. W. Peirson 1929-5-18 8389 Santa Barbara 10 miles east of Lompoc on road to Buellton. 152 Comment
  RSA80310  Orthocarpus densiflorus F. W. Peirson 1929-5-18 8390 Santa Barbara 10 miles east of Lompoc on road to Buellton. 152 Comment
  RSA90201  Alopecurus saccatus F. W. Peirson 1925-3-26 5706 Santa Barbara Between La Purisima Mission and Buellton. 152 Comment
  RSA91428  Marina parryi F. W. Peirson 1932-3-22 9802 Imperial Midway Well 152 Comment
  RSA91439  Psorothamnus spinosus F. W. Peirson 1921-4-13 568 Riverside Deep Canyon Wash, about 12 miles SE of Palm Springs. 152 Comment
  RSA95364  Ceanothus megacarpus F. W. Peirson 1925-3-27 5721 Santa Barbara hills back of Santa Barbara 152 Comment
  UC501458  Clarkia cylindrica subsp. cylindrica Frank W. Peirson 1929-5-18 8391 Santa Barbara 12 mi e Lompoc 152 Comment
  PASA2274  Ribes speciosum Frank W. Peirson 1925-3-26 Santa Barbara Gaviota Pass 182 Comment
  RSA76970  Condalia globosa var. pubescens F. W. Peirson 1932-3-21 9794 Imperial 24 miles north of Ogibly 183 Comment
  RSA82987  Stachys bullata F. W. Peirson 1925-3-26 5711 Santa Barbara Side canyon at Gaviota Pass. 183 Comment
  RSA85783  Drymocallis glandulosa var. wrangelliana F. W. Peirson 1935-3-26 5713 Santa Barbara Side canyon, Gaviota Pass. 183 Comment
  CAS-BOT-BC178567  Vulpia myuros var. myuros F. W. Peirson 1921-3-6 2360 Los Angeles San Gabriel Wash 213 Comment
  RSA66747  Eschscholzia minutiflora F. W. Peirson 1921-3-20 4175 Riverside Andreas Canyon near Palm Springs 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
  RSA77698  Ceanothus oliganthus var. sorediatus F. W. Peirson 1920-4-26 732 Los Angeles Santa Anita Wash, S base of San Gabriel Mts. 213 Comment
  RSA79860  Penstemon spectabilis subsp. subviscosus F. W. Peirson 1920-4-28 206 Los Angeles San Anita Wash, south base of San Gabriel Mountains. 213 Comment
  RSA66758  Lepidium dictyotum F. W. Peirson 1925-3-21 5576 Tulare Lewis Creek, near Lindsay. 213 Comment
  RSA70135  Triteleia laxa F. W. Peirson 1925-3-21 5578 Tulare Lewis Creek, near Lindsay. 213 Comment
  RSA70215  Allium hyalinum F. W. Peirson 1925-3-21 5555 Tulare Lewis Creek, near Lindsay. 213 Comment
  RSA80454  Plagiobothrys nothofulvus F. W. Peirson 1925-3-21 5580 Tulare Lewis Creek, near Lindsay. 213 Comment
  RSA84855  Sedella pumila F. W. Peirson 1925-3-21 5575 Tulare Lewis Creek, near Lindsay. 213 Comment
  RSA87050  Lupinus benthamii var. benthamii F. W. Peirson 1925-3-21 5560 Tulare Lewis Creek, near Lindsay. 213 Comment
  UC501548  Nama pusilla Frank W. Peirson 1932-5-10 9954 San Bernardino on the Death Valley Road 15 mi from Baker; Death Valley road, 15 mi from Baker 213 Comment
  UC501522  Nolina parryi Frank W. Peirson 1922-5-18 3026 Orange canyon heading e at river Santa Ana River 228 Comment
Read comments
Nov 26 2007
  RSA67161  Galium californicum subsp. maritimum F. W. Peirson 1937-7-19 12094 Monterey Along trail up the Big Sur River. 229 Comment
  JEPS18805  Blennosperma nanum var. nanum Frank W. Peirson 1925-3-21 5581 Tulare near Lindsay; Lewis Creek 243 Comment
  RSA0070921  Pentagramma maxonii F. W. Peirson 1921-3-20 5357 Riverside Andreas Canyon, near Palm Springs. 243 Comment
  RSA85930  Isoetes nuttallii F. W. Peirson 1925-3-22 5603 Tulare About 4 miles below Springville. 244 Comment
  UCR142886  Navarretia hamata subsp. hamata F. W. Peirson 1924-6-21 4770 San Diego Peninsular Range, benches SE of Pala [along Hwy 76 above the San Luis Rey River] 244 Comment
  RSA65503  Minuartia douglasii F. W. Peirson 1925-3-21 5583 Tulare Lewis Creek near Lindsay 244 Comment
  RSA83934  Ranunculus californicus var. rugulosus F. W. Peirson 1925-3-22 5608 Tulare 4 miles below Springville. 244 Comment
  RSA91078  Trifolium depauperatum var. truncatum F. W. Peirson 1925-3-22 5607 Tulare About 4 miles below Springville. 244 Comment
  RSA83395  Dudleya densiflora F. W. Peirson 1919-7-1 517 Los Angeles Fish Canyon 274 Comment
  SD70387  Dudleya densiflora Frank W. Peirson 1919-7-1 517 Los Angeles Fish Canyon 274 Comment
  CAS-BOT-BC363120  Rigiopappus leptocladus F. W. Peirson 1925-3-21 5596 Tulare Near stream of Lewis Creek, near Lindsay 274 Comment
  RSA0057560  Thysanocarpus curvipes subsp. curvipes Frank W. Peirson 1925-3-21 5591 Tulare Lewis Creek, near Lindsay. 274 Comment
  RSA92885  Populus fremontii subsp. fremontii F. W. Peirson 1925-3-21 5599 Tulare Lewis Creek near Lindsay. 274 Comment
  RSA73038  Linanthus jonesii F. W. Peirson 1932-3-24 9827 San Bernardino Baker, along SW base of rock hill 280 Comment
  UC501466  Gilia filiformis Frank W. Peirson 1932-3-24 9825 San Bernardino Baker 280 Comment
  RSA75120A  Nemacladus glanduliferus F. W. Peirson 1932-3-24 s.n. San Bernardino Near the town of Baker. 280 Comment
  RSA75120B  Nemacladus orientalis F. W. Peirson 1932-3-24 s.n.-b San Bernardino Near the town of Baker. 280 Comment
  RSA77194  Eremalche rotundifolia F. W. Peirson 1932-3-24 9833 San Bernardino Near the town of Baker. 280 Comment
  RSA0024569  Ribes quercetorum F. W. Peirson 1925-3-21 5598 Tulare Rocky side canyon, Lewis Creek near Lindsay. 290 Comment
  RSA93689  Hesperevax acaulis F. W. Peirson 1925-3-21 5592 Tulare Lewis Creek near Lindsay 290 Comment
  RSA94066  Hemizonia kelloggii F. W. Peirson 1924-6-21 4757 Riverside Temescal Canyon. 290 Comment
  CAS-BOT-BC407622  Gilia ochroleuca subsp. exilis Frank W. Peirson 1928-3-24 7725 Riverside Temescal Canyon, near auto camp 304 Comment
  JEPS34678  Venegasia carpesioides Frank W. Peirson 1925-4-18 5761 Ventura Sespe Creek 304 Comment
  JEPS43697  Clarkia bottae Frank W. Peirson 1919-5-18 432 Los Angeles Monrovia Canyon San Gabriel Mountains 304 Comment
  SBBG28219  Lomatium utriculatum F. W. Peirson 1921-2-26 2358 Los Angeles Topanga Cyn 304 Comment
  RSA0016300  Gilia ochroleuca subsp. exilis F. W. Peirson 1928-3-24 7725 Riverside Temescal Canyon. 305 Comment
  RSA87195  Lupinus excubitus var. hallii F. W. Peirson 1925-4-18 5752 Ventura Sespe Creek 305 Comment
  RSA90232  Astragalus douglasii var. douglasii F. W. Peirson 1925-4-18 5758 Ventura Sespe Creek. 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
  CAS-BOT-BC185944  Vulpia octoflora var. octoflora F. W. Peirson 1920-5-3 2124 Los Angeles Little Tujunga Wash, San Fernando Valley 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
  RSA80747  Cryptantha racemosa F. W. Peirson 1921-3-23 2377 Riverside Deep Canyon south of Coachella Valley 335 Comment
  JEPS32343  Euthamia occidentalis Frank W. Peirson 4161 Los Angeles Santa Clara River near Saugus 350 Comment
  PASA954  Senecio mohavensis Frank W. Peirson 1922-4-13 Imperial Moutain Springs Grade 365 Comment
  JEPS5136  Plectritis ciliosa subsp. insignis Frank W. Peirson 1925-4-23 5807 Los Angeles San Gabriel Canyon, below Forks San Gabriel Canyon 365 Comment
  RSA74922  Phacelia imbricata subsp. imbricata F. W. Peirson 1905-5-28 974 Los Angeles Rubio Wash above New York Ave., Pasadena 366 Comment
  RSA82197  Trichostema lanceolatum F. W. Peirson 1932-8-14 10415 Tuolumne Near Jamestown. 366 Comment
  RSA95064  Hemizonia fitchii F. W. Peirson 1932-8-14 10413 Tuolumne Near Jamestown. 366 Comment
  RSA0098506  Spergularia marina var. tenuis F. W. Peirson 1922-4-29 1867 Riverside South of Lake Elsinore. 374 Comment
  PASA2553  Delphinium parryi Frank W. Peirson 1922-5-18 3051 Riverside Road south of Lake Elsinore 377 Comment
  RSA65578  Spergularia platensis F. W. Peirson 1922-4-29 2926 Riverside South of Lake Elsinore. 381 Comment
  RSA66241  Platystemon californicus F. W. Peirson 1922-4-29 2935 Riverside South of Lake Elsinore. 381 Comment
  JEPS61153  Amsinckia intermedia Frank W. Peirson 1919-3-27 333 Los Angeles foot of Arroyo Seco Canyon; San Gabriel Mountains 381 Comment
  RSA0097301  Spergularia atrosperma F. W. Peirson 1922-4-29 2953 Riverside South of Lake Elsinore. 381 Comment
  RSA65177  Lastarriaea coriacea F. W. Peirson 1919-5-21 447 Los Angeles foot of canyon proper, on Arroyo Seco. 381 Comment
  RSA95238  Microseris heterocarpa F. W. Peirson 1922-4-29 2951 Riverside South of Lake Elsinore. 381 Comment
  PASA1998  Amsinckia douglasiana Frank W. Peirson 1921-3-22 Riverside Murray Canyon, Palm Springs Region 396 Comment
  PASA2165  Brickellia nevinii Frank W. Peirson September, 1918 Los Angeles Near foot of Mt. Wilson Toll Road 396 Comment
  JEPS55857  Lotus strigosus Frank W. Peirson 1919-3-27 351 Los Angeles Arroyo Seco San Gabriel Mountains 396 Comment
  RSA91979  Pleuraphis rigida F. W. Peirson 1921-3-22 2369 Riverside Murray Canyon, near Palm Springs 396 Comment
  RSA92608  Salix exigua F. W. Peirson 1919-3-30 355 Los Angeles Tujunga Canyon, west end of San Gabriel Mountains 396 Comment
  RSA92634  Monolopia lanceolata F. W. Peirson 1919-3-30 526 Los Angeles on low hill near entrance to Tujunga Canyon 396 Comment
  JEPS40303  Platanus racemosa Frank W. Peirson 1919-3-27 341 Los Angeles Arroyo Seco Canyon San Gabriel Mountains 411 Comment
  JEPS53579  Erysimum capitatum var. capitatum Frank W. Peirson 1919-3-27 337 Los Angeles Arroyo Seco Canyon San Gabriel Mountains 411 Comment
  POM9734  Equisetum telmateia var. braunii F. W. Peirson 1920-4-25 s.n. Los Angeles Arroyo Seco, Pasadena 411 Comment
Read comments
Sep 26 2014
  RSA70061  Juncus rugulosus F. W. Peirson 1924-8-23 5057 Los Angeles west fork of San Gabriel River 411 Comment
  RSA68975  Plantago erecta F. W. Peirson 1919-3-27 329 Los Angeles Arroyo Seco near Pasadena 412 Comment
  JEPS5837  Calandrinia breweri Frank W. Peirson 1919-3-27 357 Los Angeles hills w Arroyo Seco; San Gabriel Mountains 426 Comment
  JEPS62730  Salvia leucophylla Frank W. Peirson 1919-5-11 412 Los Angeles Soledad Canyon San Gabriel Mts. (n slope of San Gabriel Mts) 426 Comment
  PASA1099  Lotus micranthus Frank W. Peirson 1919-5-18 436 Los Angeles Monrovia Canyon, San Gabriel Mts. 426 Comment
  JEPS39205  Layia platyglossa F. W. Peirson 1919-3-27 328 Los Angeles Hill w of Arroyo Seco; San Gabriel Mts. 426 Comment
  JEPS65553  Melilotus albus Frank W. Peirson 1919-5-21 450 Los Angeles Arroyo Seco San Gabriel Mountains 426 Comment
  RSA66752  Caulanthus heterophyllus var. heterophyllus F. W. Peirson 1919-3-17 4186 Los Angeles Hills west of Arroyo Seco, Pasadena 426 Comment
  UC573104  Plagiobothrys trachycarpus Frank W. Peirson 1925-3-25 5669 San Luis Obispo Morro Creek Divide 426 Comment
  RSA74918  Phacelia imbricata subsp. imbricata F. W. Peirson 1921-5-18 2827 Los Angeles summit of Newhall Grade, northwest end of San Gabriel Range. 427 Comment
  RSA84468  Clematis pauciflora F. W. Peirson 1921-3-22 s.n. Riverside Murray Canyon, near Palm Springs 427 Comment
  RSA86726  Aristida purpurea var. nealleyi F. W. Peirson 1935-4-18 11499 San Bernardino Northern part of Whipple Mountains, road going down into Copper Basin 427 Comment
  UCR142549  Parietaria hespera var. hespera F. W. Peirson 1920-2-15 1714 Riverside San Jacinto Mtns./Sonoran (Colorado) Desert, Tahquitz Canyon, near Palm Springs 427 Comment
  RSA65366  Rumex acetosella F. W. Peirson 1919-5-18 1809 Los Angeles South slope of San Gabriel Mountains. Monrovia Canyon. 427 Comment
  RSA79568  Cryptantha intermedia F. W. Peirson 1919-2-12 320 Los Angeles Hills west of Arroyo Seco, near Pasadena 427 Comment
  RSA90711  Astragalus trichopodus var. lonchus F. W. Peirson 1923-9-8 4044 Orange Trabucco Canyon. 427 Comment
  RSA92401  Bebbia juncea F. W. Peirson 1923-9-8 4043 Orange Trabucco Canyon. 427 Comment
  RSA95084  Microseris douglasii subsp. douglasii F. W. Peirson 1922-4-30 2952 Riverside Plains one mile west of Lakeview, San Jacinto Valley 427 Comment
  RSA65360  Atriplex canescens F. W. Peirson 1921-7-1 1811 Los Angeles Soledad Canyon, north base of San Gabriel Mountains. 442 Comment
  SD87755  Diplacus calycinus Frank W. Peirson 1927-5-28 7309 Kern Kern River Road, 15 miles from Bakersfield, steep wooded canyon slope 456 Comment
  CAS-BOT-BC181570  Crossosoma bigelovii Frank W. Peirson 1922-4-9 s.n. Riverside Andreas Canyon - Colorado Desert 457 Comment
  CAS-BOT-BC213221  Ayenia compacta Frank W. Peirson 1922-4-9 9600 Riverside Andreas Canyon, Palm Springs Region 457 Comment
  JEPS10622  Castilleja exserta subsp. exserta Frank W. Peirson 1919-3-27 334 Los Angeles w of Arroyo Seco; San Gabriel Mountains 457 Comment
  JEPS1287  Phacelia tanacetifolia Frank W. Peirson 1920-3-28 2101 Los Angeles Tujunga Canyon San Gabriel Mountains 457 Comment
  JEPS42284  Ceanothus oliganthus var. oliganthus Frank W. Peirson 1927-3-19 7116 Los Angeles Seminole Hot Springs Region Santa Monica Mountains 457 Comment
  JEPS52365  Chamaesyce serpyllifolia Frank W. Peirson 1921-6-20 2445 Los Angeles San Gabriel Mtns, San Gabriel River, North Fork 457 Comment
  JEPS53712  Lepidium nitidum Frank W. Peirson 1925-3-19 5506 Kern n slope Tehachapi Pass 457 Comment
  JEPS55486  Lotus heermannii Frank W. Peirson 1919-7-1 510 Los Angeles Fish Canyon San Gabriel Mountains 457 Comment
  JEPS75653  Platystemon californicus Frank W. Peirson 1920-3-28 2103 Los Angeles Tujunga Canyon; San Gabriel Mountains, Tujunga Canyon 457 Comment
  PASA1246  Poa bigelovii Frank W. Peirson 1921-3-22 Riverside Murray Canyon 457 Comment
  PASA625  Juncus balticus Frank W. Peirson 1922-6-4 Los Angeles Soledad Canyon 457 Comment
  RSA100199  Lonicera subspicata var. denudata F. W. Peirson 1920-6-22 217 Riverside Dripping Springs, Temecula River 457 Comment
  RSA65720  Claytonia parviflora subsp. utahensis F. W. Peirson 1921-3-22 2389 Riverside Murray Canyon near Palm Springs. 457 Comment
  RSA66244  Platystemon californicus F. W. Peirson 1925-3-19 5500 Kern North slope of Tehachapi Mountains. 457 Comment
  RSA69628  Juncus balticus F. W. Peirson 1922-6-4 1642 Los Angeles Soledad Canyon, San Gabriel Mountains. 457 Comment
  RSA70225  Allium haematochiton F. W. Peirson 1921-4-21 2841 Los Angeles Foot of San Dimas Canyon. 457 Comment
  RSA70560  Croton californicus F. W. Peirson 1918-10-17 276 Los Angeles foot of Pacoima Canyon 457 Comment
  RSA72242  Camissonia claviformis subsp. peirsonii F. W. Peirson 1922-4-13 2892 Imperial Mountain Spring Grade. 457 Comment
  RSA73363  Clarkia unguiculata F. W. Peirson 1920-5-16 2086 Los Angeles Tujunga Canyon, west end of San Gabriel Mountains. 457 Comment
  RSA76934  Simmondsia chinensis F. W. Peirson 1919-4-13 2049 Riverside Murray Canyon, Palm Springs Region. 457 Comment
  RSA77491  Ceanothus spinosus F. W. Peirson 1929-4-21 8332 Santa Barbara San Marcus Pass. 457 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
  RSA87199  Lupinus albifrons var. albifrons F. W. Peirson 1925-3-22 5612 Tulare Middle Fork of Tule River, Sierra Nevada. 457 Comment
  UC908751  Saltugilia australis Frank W. Peirson 1928-4-19 7848 Riverside hills n Elsinore; hills n of Elsinore 457 Comment
  RSA0121585  Eriastrum sapphirinum subsp. dasyanthum F. W. Peirson 1920-6-22 4474 Riverside Dripping Spring southeast of Temecula 457 Comment
  RSA65025  Silene multinervia F. W. Peirson 1925-5-20 6013 Riverside Burned area in chaparral, 1 mile northwest of Dripping Spring, W. Riverside Co. 457 Comment
  RSA65616  Cerastium glomeratum F. W. Peirson 1919-5-18 438 Los Angeles Hills east of Monrovia Canyon 457 Comment
  RSA70157  Dichelostemma capitatum subsp. capitatum F. W. Peirson 1919-5-18 s.n. Los Angeles Hills east of Monrovia Canyon 457 Comment
  RSA73080  Linanthus dichotomus subsp. dichotomus F. W. Peirson 1925-3-22 5615 Tulare Middle Fork of Tule River, Sierra Nevada. 457 Comment
  RSA73685  Leptosiphon bicolor F. W. Peirson 1925-3-22 5617 Tulare Middle Fork of Tule River, Sierra Nevada. 457 Comment
  RSA90856  Carex triquetra F. W. Peirson 1918-5-5 1634 Los Angeles Summit of Santa Sunann [Susana?] Grade between Los Angeles and Ventura Counties. 457 Comment
  RSA91697  Gnaphalium palustre F. W. Peirson 1930-5-10 8769 Riverside Roadside, on Hemet Plateau near March Field, between Riverside and Perris. 457 Comment
  RSA92228  Calycadenia ciliosa F. W. Peirson 1925-8-15 6349 Lake About 0.5 miles above Blue Lakes 457 Comment
  RSA92248  Layia platyglossa subsp. campestris F. W. Peirson 1919-3-27 328 Los Angeles Hills west of the Arroyo Seco, near Pasadena 457 Comment
  RSA93873  Helenium puberulum F. W. Peirson 1923-10-21 4228 Los Angeles Sunset Canyon, Verdugo Mountains 457 Comment
  RSA95361  Ceanothus megacarpus F. W. Peirson 1921-2-26 2359 Los Angeles Topanga Canyon Road, west end of San Gabriel Mts. Near summit of ridge, north slope 457 Comment
  RSA90280  Lathyrus vestitus var. vestitus F. W. Peirson 1920-5-16 2137 Los Angeles Tujunga Canyon, west end of San Gabriel Mountains. 473 Comment
  CAS-BOT-BC361118  Lasthenia microglossa Peirson 1919-4-14 s.n. Riverside Murray Canon 487 Comment
  RSA82388  Salvia vaseyi F. W. Peirson 1933-4-13 10635 Riverside Deep Canyon to Santa Rosa Mts. road 488 Comment
  UCR142553  Hesperocnide tenella F. W. Peirson 1921-2-26 2356 Los Angeles Western Transverse Range; Santa Monica Mtns., Topanga Canyon Divide 488 Comment
  RSA70586  Sisyrinchium bellum Frank W. Peirson 1919-5-18 444 Los Angeles Monrovia Canyon. 518 Comment
  RSA92242  Calycadenia truncata subsp. truncata F. W. Peirson 1936-7-13 11831 Monterey Nacimiento Creek; a branch of San Antonio River 518 Comment
  JEPS45538  Cercocarpus betuloides var. betuloides Frank W. Peirson 1919-3-27 340 Los Angeles road out of Arroyo Seco San Gabriel Mountains 533 Comment
  PASA1287  Stellaria nitens Frank W. Peirson 1929-4-23 Los Angeles Forks of the San Gabriel River 533 Comment
  RSA0079461  Cryptantha muricata var. jonesii F. W. Peirson 1925-4-23 5794 Los Angeles Burned hillslope at forks of San Gabriel River. 533 Comment
  RSA428780  Solanum umbelliferum F. W. Peirson 1922-4-29 4487 Riverside Leach Canyon. (base of Santa Ana Mts., near Elsinore) 534 Comment
  RSA73047  Leptosiphon androsaceus F. W. Peirson 1922-4-28 4472 Riverside Leach Canyon, near Elsinore 534 Comment
  RSA77237  Eriodictyon crassifolium F. W. Peirson 1922-4-28 4480 Riverside Leach Canyon, near Elsinore 534 Comment
  RSA77255  Emmenanthe penduliflora var. penduliflora F. W. Peirson 1925-4-23 5799 Los Angeles Forks of San Gabriel River. 534 Comment
  RSA83976  Saxifraga californica F. W. Peirson 1919-4-19 373 Los Angeles Pacoima Canyon, west end of San Gabriel Mountains 534 Comment
  RSA65027  Silene multinervia F. W. Peirson 1925-4-23 5789 Los Angeles Forks of San Gabriel River. 534 Comment
  RSA69576  Mentzelia micrantha F. W. Peirson 1925-4-23 5797 Los Angeles Forks of San Gabriel River. 534 Comment
  RSA73301  Clarkia deflexa F. W. Peirson 1919-5-21 4703 Los Angeles Arroyo Seco, Pasadena. 534 Comment
  RSA91229  Lupinus formosus var. formosus F. W. Peirson 1919-3-11 90 Los Angeles First small canyon east of Rubio Canyon, south base of San Gabriel Mts. 534 Comment
  RSA93358  Heterotheca fastigiata F. W. Peirson 1918-10-16 285 Los Angeles Pacoima Canyon west end of San Gabriel Mts. 534 Comment
  JEPS12738  Sambucus mexicana Frank W. Peirson 1919-4-24 391 Los Angeles canyon e Rubio; San Gabriel Mountains 548 Comment
  JEPS20384  Heterotheca grandiflora Frank W. Peirson 1918-10-15 281 Los Angeles foot of Echo Mt. trail San Gabriel Mountains, Echo Mt. 548 Comment
  PASA922  Calycoseris parryi Frank W. Peirson 1930-4-15 Inyo 9 miles south of Death Valley Junction 548 Comment
  RSA72101  Epilobium canum subsp. canum F. W. Peirson 1919-10-26 4517 Los Angeles Along Pacific Electric tracks to Rubio Canyon, San Gabriel Mts. 549 Comment
  RSA76951  Eremocarpus setiger F. W. Peirson 1919-10-26 2046 Los Angeles Along Pacific Electric tracks to Rubio Canyon, San Gabriel Mts. 549 Comment
  RSA77145  Ceanothus crassifolius F. W. Peirson 1919-1-19 302 Los Angeles Rubio Canyon, San Gabriel Mountains. 549 Comment
  RSA82554  Stachys albens F. W. Peirson 1927-8-14 7840 Los Angeles Arroyo Seco south base of San Gabriel Mts. 549 Comment
  RSA92259  Layia platyglossa subsp. campestris F. W. Peirson 1919-4-15 2575 Riverside Whitewater Grade near Cabazon 549 Comment
Read comments
Mar 13 2011
  RSA69573  Mentzelia micrantha F. W. Peirson 1918-6-12 119 Los Angeles In area recently burned over, in hills east of Rubio Canyon, San Gabriel Mts. 549 Comment
  RSA92427  Helianthus gracilentus F. W. Peirson 1923-5-5 4147 Orange Trabuco Canyon, Santa Ana Mts. 549 Comment
  RSA86716  Andropogon glomeratus F. W. Peirson 1924-9-2 5202 San Bernardino Arrowhead Hot Springs. 579 Comment
  RSA92145  Schoenus nigricans F. W. Peirson 1924-9-2 5199 San Bernardino Arrowhead Hot Springs. 579 Comment
  JEPS17151  Lomatium dasycarpum subsp. dasycarpum Frank W. Peirson 1919-3-27 338 Los Angeles foot of Lukeys Peak Trail (San Gabriel Mts.); San Gabriel Mts. 579 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
  RSA73049  Leptosiphon parviflorus F. W. Peirson 1919-4-19 377 Los Angeles Pacoima Canyon, west end of San Gabriel Mts. 579 Comment
  RSA74785  Phacelia ramosissima var. latifolia F. W. Peirson 1920-6-10 2159 Los Angeles foot of Echo Mt. trail San Gabriel Mts. 579 Comment
  CAS-BOT-BC158001  Garrya veatchii F. W. Peirson 1919-11-30 2723 Los Angeles Eaton Canyon, San Gabriel Mts. 609 Comment
  CAS-BOT-BC159275  Garrya veatchii Frank W. Peirson 1919-11-30 2723 Los Angeles Eaton Canyon 609 Comment
  CAS-BOT-BC16346  Athysanus unilateralis Frank W. Peirson 1925-3-19 5482 Kern North slope Tehachapi Pass. 609 Comment
  CAS-BOT-BC432274  Lithophragma affine Frank W. Peirson 1925-4-11 5734 Orange Silverado Canyon, Santa Ana Mts. 609 Comment
  JEPS1188  Phacelia minor F. W. Peirson 1918-6-4 162 Los Angeles foothills e Rubio Canyon; San Gabriel Mountains 609 Comment
  JEPS12565  Deinandra fasciculata Frank W. Peirson 1918-6-28 236 Los Angeles e of Rubio Canyon; San Gabriel Mountains 609 Comment
  JEPS2995  Osmorhiza brachypoda Frank W. Peirson 1919-5-21 451 Los Angeles Arroyo Seco San Gabriel Mountains 609 Comment
  JEPS43922  Fraxinus dipetala Frank W. Peirson 1919-7-1 383 a Los Angeles Fish Canyon San Gabriel Mountains 609 Comment
  JEPS5226  Nemacladus ramosissimus Frank W. Peirson 1918-6-4 220 Los Angeles foothills e. of Rubio Canyon; San Gabriel Mountains 609 Comment
  JEPS55286  Lathyrus vestitus var. vestitus Frank W. Peirson 1919-4-19 374 Los Angeles Pacoima Canyon San Gabriel Mountains 609 Comment
Read comments
Feb 25 2015
  JEPS5902  Delphinium parryi Frank Peirson 1918-6-1 48 Los Angeles foothills e Rubio Canyon (n base of mts., back and slightly e of Altadena); San Gabriel Mountains 609 Comment
  JEPS69109  Eriastrum sapphirinum Frank W. Peirson 1918-6-28 156 Los Angeles foothills e Rubio Canyon; San Gabriel Mts. 609 Comment
  JEPS78510  Nemacladus pinnatifidus Frank W. Peirson 1918-6-12 219 Los Angeles foothills e Rubio Canyon; San Gabriel Mountains 609 Comment
  JEPS27003  Caulanthus heterophyllus Frank W. Peirson 1918-6-4 63 Los Angeles e Rubio Canyon (northern outskirts of Altadena); foothills at southern base San Gabriel Mountains 609 Comment
  PASA1828  Osmorhiza brachypoda Frank W. Peirson 1919-5-21 Los Angeles Arrroyo Seco Canyon 609 Comment
  RSA97152  Lomatium dasycarpum subsp. dasycarpum F. W. Peirson 1919-3-27 338 Los Angeles Foot of trail to Lukens Peak 609 Comment
  RSA66749  Eschscholzia glyptosperma F. W. Peirson 1930-4-15 8711 Inyo Along the Amargosa River, 6 miles south of Death Valley Junction 610 Comment
  RSA69893  Fraxinus dipetala F. W. Peirson 1925-4-10 5743 Orange In Silverado Canyon. 610 Comment
  RSA70238  Allium peninsulare F. W. Peirson 1930-5-10 8773 Riverside St. Johns Grade. south of Hemet 610 Comment
  RSA74808  Phacelia parryi F. W. Peirson 1930-5-11 8787 San Diego San Luis Rey River. 610 Comment
  RSA0011736  Asplenium vespertinum F. W. Peirson 1919-12-28 1520 Los Angeles Middle Eaton Canyon, south face of San Gabriel Mts. 610 Comment
  RSA0126321  Nemacladus longiflorus var. longiflorus F. W. Peirson 1921-6-21 2453 Los Angeles West Fork of San Gabriel River. 610 Comment
  RSA65304  Eriogonum thurberi F. W. Peirson 1930-5-30 8901 Los Angeles shade of oaks, Mint Canyon 610 Comment
  RSA80408  Mimulus congdonii F. W. Peirson 1925-3-22 5624 Tulare Middle Fork Tule River. 610 Comment
  RSA91283  Lessingia glandulifera var. glandulifera F. W. Peirson 1918-10-26 294 Los Angeles South base of San Gabriel Mountains, Big Dalton Canyon. 610 Comment
  RSA92415  Coreopsis bigelovii F. W. Peirson 1925-3-22 5622 Tulare Middle Fork of Tule River 610 Comment
  RSA95078  Microseris sylvatica F. W. Peirson 1928-4-5 7836 Kern North slope of Tehachapi Pass 610 Comment
  SEINET10461064  Nemacladus ramosissimus Frank W. Peirson 1918-6-4 Peirson 220 Los Angeles Foothills east of Rubio Canyon, San Gabriel Mountains 610 Comment
  JEPS59145  Cirsium occidentale var. californicum Frank W. Peirson 1918-6-1 248 Los Angeles San Gabriel Mts., Eaton Canyon 640 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
  RSA71797  Gilia capitata subsp. abrotanifolia F. W. Peirson 1919-4-19 384 Los Angeles Pacoima Canyon, west end of San Gabriel Mountains. 671 Comment
  RSA94957  Malacothrix clevelandii F. W. Peirson 1919-5-21 445 Los Angeles Arroyo Seco Canyon, near Pasadena 685 Comment
  RSA80010  Cryptantha micrantha var. lepida F. W. Peirson 1919-4-16 370 San Bernardino South slope of Cajon Pass. 686 Comment
  SD87570  Gilia diegensis F. W Peirson 1919-4-16 4133 San Bernardino Cajon Pass. 686 Comment
  RSA91128  Trifolium microcephalum F. W. Peirson 1923-5-21 3513 Los Angeles Fish Canyon, San Bernardino Mountains 686 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
  RSA69414  Delphinium parryi F. W. Peirson 1929-5-4 8337 Riverside Mostly about bushes on low hill about 2 miles south of summit of St. Johns Grade south of Hemet. 701 Comment
  JEPS960  Sanicula tuberosa Frank W. Peirson 1919-5-14 422 Los Angeles San Gabriel Mountains, Eaton Canyon Eaton Canyon; San Gabriel Mountains, Eaton Canyon 731 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
  UCR19612  Langloisia schottii F. W. Peirson 1927-5-7 7275 San Bernardino Western Mojave Desert, 1 mi. east of Kramer 757 Comment
  LA38961  Mimulus palmeri Frank W. Peirson; 1922-4-30 2934 Riverside below summit of St. Johns Grade 761 Comment
  CAS-BOT-BC407815  Gilia ochroleuca subsp. exilis F. W. Peirson 1929-5-4 8342 San Diego About 5 miles N of Oak Grove 762 Comment
  JEPS36641  Malacothrix glabrata F. W. Peirson 1921-6-20 2149 a Los Angeles North Fork San Gabriel River San Gabriel Mts. 762 Comment
  RSA69570  Arbutus menziesii F. W. Peirson 1919-4-5 140 Los Angeles Old Trail to Mt. Wilson, San Gabriel Mts. 762 Comment
  UC501438  Gilia minor Frank W. Peirson 1932-4-17 9861 Los Angeles 2 mi ne Lovejoy Buttes (Mohave Desert); , ne of Lovejoy Buttes 762 Comment
  RSA0017268  Gilia ochroleuca subsp. exilis F. W. Peirson 1929-5-4 8342 San Diego About 5 miles N of Oak Grove. 762 Comment
  RSA0059184  Orobanche uniflora subsp. occidentalis Frank W. Peirson 1921-5-12 1174 Los Angeles Big Santa Anita Trail, south slope of San Gabriel Mts. 762 Comment
  RSA80170  Collinsia heterophylla F. W. Peirson 1921-6-21 4492 Los Angeles west fork of San Gabriel River 762 Comment
  RSA85046  Pteridium aquilinum var. pubescens F. W. Peirson 1923-5-21 3510 Los Angeles Fish Canyon, south base of San Gabriel Mountains 762 Comment
  RSA92542  Salix exigua F. W. Peirson 1932-4-17 9859 Los Angeles Margin of Lovejoy Dam, Lovejoy Buttes, SW Mojave Desert. 762 Comment
  RSA95217  Stephanomeria pauciflora F. W. Peirson 1927-5-29 7338 Kern Red Rock Canyon, west end of Mojave Desert. 762 Comment
  RSA94959  Malacothrix clevelandii F. W. Peirson 1923-5-21 5288 Los Angeles South face of San Gabriel Mountains. Fish Canyon 792 Comment
  RSA75874  Nemophila menziesii F. W. Peirson 1929-5-4 8336 Riverside In open spaces along road, summit of St. John s Grade, south of Hemet. 793 Comment
  RSA82074  Utricularia vulgaris subsp. macrorhiza F. W. Peirson 1924-8-31 5113 San Bernardino South of Victorville 793 Comment
  RSA69803  Centaurium venustum F. W. Peirson 1921-7-19 144 Los Angeles At forks of Coldwater Canyon and Cattle Canyon, East Fork San Gabriel Canyon 793 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
  RSA90850  Carex senta F. W. Peirson 1919-5-14 1625 Los Angeles W fork of Eaton Canyon 822 Comment
  POM171944  Chorizanthe membranacea F. W. Peirson 1930-5-14 8844 Kern Kern River 823 Comment
  JEPS62700  Salvia dorrii Frank W. Peirson 1919-5-11 392 Los Angeles Arraster Canyon; San Gabriel Mts. 838 Comment
  JEPS64999  Lupinus bicolor Frank W. Peirson 1919-5-10 413 Los Angeles Arraster Canyon San Gabriel Mts., Arraster Canyon 838 Comment
Read comments
Aug 21 2014
  RSA69499  Mirabilis laevis var. villosa F. W. Peirson 1919-5-10 1853 Los Angeles Arraster [Arrastre] Creek, San Gabriel Mountains. 838 Comment
  RSA81476  Castilleja plagiotoma F. W. Peirson 1919-5-10 1148 Los Angeles Arraster [Arrastre] Creek, San Gabriel Mountains. 838 Comment
  JEPS5324  Lobelia dunnii var. serrata F. W. Peirson 1918-8-6 260 Los Angeles old trail to Mount Wilson 838 Comment
  RSA100232  Lobelia dunnii var. serrata F. W. Peirson 1918-8-6 260 Los Angeles Sierra Madre Trail to Mt. Wilson 838 Comment
  RSA92539  Eriophyllum wallacei F. W. Peirson 1919-5-9 1391 Los Angeles San Gabriel Mountains. 838 Comment
  POM128670  Malacothamnus orbiculatus F. W. Peirson 1927-5-29 7320 Kern Just south of Tulare County line, Kern River. 845 Comment
  JEPS34547  Allium lacunosum Frank W. Peirson 1919-5-10 426 Los Angeles Arrastre Creek San Gabriel Mountains 853 Comment
Read comments
Jan 1 2017
  JEPS5153  Castilleja applegatei subsp. martinii F. W. Peirson 1918-5-19 209 Los Angeles Millards Canyon San Gabriel Mountains 853 Comment
  RSA427394  Solanum umbelliferum F. W. Peirson 1926-5-1 6720 San Diego Bottom lands of temecula River, Oak grove. 854 Comment
  RSA77731  Viola purpurea subsp. quercetorum F. W. Peirson 1930-5-11 8780 San Diego near Henshaw Dam. 854 Comment
  RSA80340  Orthocarpus densiflorus var. gracilis F. W. Peirson 1926-4-30 6703 San Diego Oprn grassy field near Henshaw Dam, northeastern San Diego Co. 854 Comment
  RSA80680  Helianthemum scoparium var. aldersonii F. W. Peirson 1920-6-23 2170 San Diego Oak Grove 854 Comment
  RSA0041598  Thysanocarpus curvipes F. W. Peirson 1930-5-11 8783 San Diego Henshaw Dam. 854 Comment
  RSA65808  Thlaspi arvense F. W. Peirson 1919-2-23 66 Los Angeles Henniger s Falt, San Gabriel Mts 854 Comment
  RSA66026  Eriogonum gracile var. gracile F. W. Peirson 1918-11-2 296 Los Angeles Hennigers Flat, north San Gabriel Mts. 854 Comment
  RSA92075  Micropus californicus F. W. Peirson 1930-5-11 8779 San Diego near Henshaw Dam. 854 Comment
  RSA95112  Agoseris heterophylla var. heterophylla F. W. Peirson 1930-5-11 8785 San Diego near Henshaw Dam. 854 Comment
  JEPS43186  Claytonia parviflora subsp. parviflora F. W. Peirson 1918-5-27 35 Los Angeles Henninger Flats 868 Comment
  JEPS62867  Scutellaria tuberosa Frank W. Peirson 1918-5-26 178 Los Angeles Henninger Flats; San Gabriel Mountains, Henninger Flats 868 Comment
  UC501631  Lessingia glandulifera var. glandulifera Frank W. Peirson 1921-5-29 1262 San Bernardino opposite Hesperia; Mohave River 868 Comment
  RSA67357  Lepidium flavum F. W. Peirson 1921-5-29 2813 San Bernardino Mojave River 869 Comment
  POM12544  Thlaspi arvense F. W. Peirson 1919-2-23 s.n. Los Angeles Henninger Flats. N of Pasadena. 869 Comment
  CAS-BOT-BC339412  Lessingia glandulifera var. glandulifera F. W. Peirson 1921-5-29 1262 San Bernardino Mohave River, Mohave Desert 883 Comment
  JEPS41864  Corethrogyne filaginifolia Frank W. Peirson 1918-8-6 257 Los Angeles Mt. Wilson, Toll Road San Gabriel Mts., Mt. Wilson 883 Comment
  PASA2187  Chaenactis carphoclinia var. attenuata Frank W. Peirson 1930-5-13 Kern Red Rock Canyon 883 Comment
  PASA960  Tetradymia glabrata Frank W. Peirson 1930-5-13 Kern Red Rock Canyon 883 Comment
  UC501429  Gilia hutchinsifolia Frank W. Peirson 1932-5-5 9870 Kern Red Rock Canyon 883 Comment
  UC573115  Cryptantha pterocarya Frank W. Peirson 1921-5-29 5812 San Bernardino Mohave River 883 Comment
  RSA614278  Ericameria cooperi F. W. Peirson 1931-5-30 5427 San Bernardino Mojave River, E of Hesperia. Old river terrace 884 Comment
  RSA87141  Lupinus horizontalis var. platypetalus F. W. Peirson 1930-5-13 8800 Kern Red Rock Canyon. 884 Comment
  RSA90448  Glycyrrhiza lepidota F. W. Peirson 1921-5-30 4425 San Bernardino Mojave River, Victorville. 884 Comment
  RSA94935  Tetradymia glabrata F. W. Peirson 1930-5-13 8799 Kern Red Rock Canyon 884 Comment
  CAS-BOT-BC326821  Xylorhiza tortifolia F. W. Peirson 1922-5-14 s.n. San Bernardino 5 miles norht of Barstow, Mojave Desert 914 Comment
  CAS-BOT-BC407812  Gilia ochroleuca subsp. exilis F. W. Peirson 1929-5-5 8363 San Diego South slope of divide between Oak Grove and Warner's Hot Springs 914 Comment
  CAS-BOT-BC407813  Gilia ochroleuca subsp. exilis F. W. Peirson 1929-5-5 8363 San Diego South slope of divide between Oak Grove and Warner's Hot Springs 914 Comment
  JEPS1433  Nama californica Frank W. Peirson 1919-5-10 396 Los Angeles Arraster Creek; San Gabriel Mountains, Arraster Creek 914 Comment
  JEPS31726  Camissonia strigulosa Frank W. Peirson 1919-5-10 405 Los Angeles Arraster Creek San Gabriel Mountains 914 Comment
  JEPS4627  Collinsia parryi F. W. Peirson 1918-6-1 193 Los Angeles ne Altadena; San Gabriel Mts., Eaton Canyon 914 Comment
  JEPS60620  Delphinium parishii subsp. parishii Frank W. Peirson 1919-5-10 419 Los Angeles Arraster Creek San Gabriel Mountains 914 Comment
  JEPS66574  Arbutus menziesii Frank W. Peirson 1919-4-5 140 Los Angeles Old Mt. Wilson Trail; San Gabriel Mountains, Sierra Madre, Old Mt. Wilson Trail 914 Comment
  JEPS75649  Dendromecon rigida Frank W. Peirson 1919-5-21 408 Los Angeles Arroyo Seco Canyon; San Gabriel Mountains 914 Comment
  JEPS8766  Castilleja foliolosa Frank W. Peirson 1919-5-10 430 Los Angeles Arraster Creek San Gabriel Mountains 914 Comment
  PASA2253  Ribes indecorum Frank W. Peirson 1925-4-11 Orange Silverado Canyon, Santa Ana Mountains 914 Comment
  RSA71122  Calystegia occidentalis subsp. fulcrata F. W. Peirson 1923-5-21 3516 Los Angeles Fish Canyon 914 Comment
  RSA91501  Trifolium ciliolatum F. W. Peirson 1923-5-21 3517 Los Angeles Fish Canyon 914 Comment
  UC501432  Scutellaria antirrhinoides Frank W. Peirson 1932-7-17 10327 Shasta Goose Valley, Wallace Ranch Goose Valley; , Wallace Ranch 914 Comment
  UC501483  Polygala cornuta var. cornuta Frank W. Peirson 1932-7-17 10331 Shasta Wallace Ranch Goose Valley 914 Comment
  CAS-BOT-BC344377  Madia exigua Frank W. Peirson 1923-5-21 3511 Los Angeles Fish Canyon, San Gabriel Mts. 914 Comment
  PASA2331  Madia exigua Frank W. Peirson 1923-5-21 Los Angeles Fish Canyon, San Gabriel Mts. 914 Comment
  RSA90422  Lotus strigosus F. W. Peirson 1921-6-20 4076 Los Angeles N fork San Gabriel River 914 Comment
  RSA65083  Eriogonum gracillimum F. W. Peirson 1932-11-13 10485 San Bernardino Deadman Point, east of Victorville. 915 Comment
  RSA70874  Arctostaphylos glauca F. W. Peirson 1924-12-5 5383 Los Angeles Little Santa Anita Canyon 915 Comment
Read comments
Dec 30 2007
  RSA71836  Gilia aliquanta subsp. aliquanta F. W. Peirson 1924-5-14 4548 San Bernardino 2 miles N of Cajon Pass. 915 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
  RSA74200  Phacelia campanularia subsp. vasiformis F. W. Peirson 1926-4-27 6678 San Bernardino 13 miles W of Victorville 915 Comment
  RSA75529  Phacelia fremontii F. W. Peirson 1919-5-10 400 Los Angeles Arraster [Arrastre] Creek. North base of San Gabriel Mountains. 915 Comment
  RSA82570  Stachys rigida subsp. quercetorum F. W. Peirson 1920-6-25 2193 San Diego from Oak Grove to Warners Hot Springs. 915 Comment
  RSA83433  Pycnanthemum californicum F. W. Peirson 1921-7-15 2731 Los Angeles Main branch of San Gabriel River. 915 Comment
  SD87569  Cryptantha intermedia F. W. Peirson 1919-5-11 402 Los Angeles San Gabriel Mountains, Arraster 915 Comment
  POM98118  Ceanothus oliganthus F. W. Peirson 1925-4-11 5735 Orange slope above mill, in Silverado Canyon, Santa Ana Mountains. 915 Comment
  POM9920  Petunia parviflora F. W. Peirson 1920-6-25 2207 San Diego San Luis Rey. 915 Comment
  RSA71799  Gilia achilleifolia F. W. Peirson 1925-3-23 5638 Fresno Slope slightly above County Auto Camp, Inner Coast Ranges, road between Coalinga and Parksfield 915 Comment
  RSA92129  Eleocharis palustris F. W. Peirson 1925-5-19 6006 San Diego About 4 miles northwest of Warners Hots Spring on the San Luis Rey River 915 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
  RSA92993  Lasthenia debilis F. W. Peirson 1930-5-15 8883 Kern Greenhorn Range, SE of Glenville. 915 Comment
  RSA93363  Heterotheca sessiliflora subsp. fastigiata F. W. Peirson 1921-10-9 4735 Los Angeles Delta Canyon, tributary to Tujunga Creek, west end of San Gabriel Mountains. 915 Comment
  RSA93802  Chaenactis glabriuscula var. megacephala F. W. Peirson 1925-3-24 5653 Monterey Inner Coast Range on road from Coalinga to Parkfield 915 Comment
  RSA93808  Chaenactis artemisiifolia F. W. Peirson 1919-7-3 242 Los Angeles San Gabriel Mountains: Lukens Peak 915 Comment
  RSA94083  Psathyrotes annua F. W. Peirson 1924-8-31 5127 San Bernardino 1 miles W of Box S Ranch, Southern Mojave Desert E of Victorville 915 Comment
  RSA95258  Sidalcea oregana subsp. spicata F. W. Peirson 1932-7-17 10323 Shasta Wallace Ranch, Goose Valley 915 Comment
  RSA80434  Antirrhinum multiflorum F. W. Peirson 1924-5-26 4643 Los Angeles Trail to Switzers Camp, San Gabriel Mts 930 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
  RSA91093  Trifolium variegatum F. W. Peirson 1921-5-19 560 Los Angeles Little Rock Creek 945 Comment
  RSA95291  Rhamnus ilicifolia F. W. Peirson 1924-5-26 4625 Los Angeles trail to Switzers Camp, Arroyo Seco, north of Pasadena 945 Comment
  RSA67359  Lepidium fremontii var. fremontii F. W. Peirson 1921-5-19 677 Los Angeles Little Rock Creek: N slope of San Gabriel Mountains 960 Comment
  RSA94394  Chaenactis fremontii F. W. Peirson 1921-5-19 2409 Los Angeles Little Rock Creek: N slope of San Gabriel Mountains 960 Comment
  JEPS34174  Chaenactis glabriuscula var. glabriuscula F. W. Peirson 1921-5-19 1399 Los Angeles Little Rock Creek San Gabriel Mts., Little Rock Creek 975 Comment
  JEPS39203  Layia glandulosa F. W. Peirson 1921-5-19 2413 Los Angeles Little Rock Creek San Gabriel Mountains, Little Rock Creek 975 Comment
  RSA94610  Syntrichopappus fremontii F. W. Peirson 1921-5-20 4746 Los Angeles Little Rock Creek, N slope of San Gabriel Mtns. 976 Comment
  RSA95286  Frangula californica subsp. cuspidata F. W. Peirson 1921-5-20 4442 Los Angeles Little Rock Creek, San Gabriel Mts. 976 Comment
  JEPS15762  Yabea microcarpa Frank W. Peirson 1918-6-1 132 Los Angeles Eaton Canyon; San Gabriel Mountains 990 Comment
  JEPS37  Eriodictyon crassifolium var. nigrescens Frank W. Peirson 1918-5-19 171 Los Angeles Echo Mountain; San Gabriel Mountains, Echo Mountain 990 Comment
  JEPS42338  Ceanothus papillosus var. roweanus F. W. Peirson 1923-1 3492 Orange Holy Jim Canon Santa Ana Mountains, SW Riverside Co. 990 Comment
Read comments
Oct 2 2011
  JEPS11456  Mimulus nasutus Frank W. Peirson 1922-5-30 3073 Los Angeles Millard's Canyon San Gabriel Mountains 990 Comment
Read comments
Oct 2 2011
  JEPS11806  Heterocodon rariflorum Frank W. Peirson 1921-6-14 1210 Los Angeles Trail Fork San Gabriel; San Gabriel Mountains 990 Comment
  RSA66192  Meconella californica F. W. Peirson 1930-5-15 8885 Kern Greenhorn Range, hills southeast of Glenville 991 Comment
  RSA0076531  Acanthomintha lanceolata F. W. Peirson 1925-3-23 5646 Fresno Road from Coalinga to Parkfield. 991 Comment
  JEPS69845  Leptodactylon californicum subsp. glandulosum Frank W. Peirson 1918-5-19 158 Los Angeles Echo Mountain; San Gabriel Mts., Echo Mountain 1005 Comment
  POM89885  Ceanothus oliganthus var. oliganthus F. W. Peirson 1926-3-20 6513 Los Angeles Arroyo Seco. 1006 Comment
  RSA74948  Phacelia distans F. W. Peirson 1921-5-20 4714 Los Angeles Little Rock Creek: north base of San Gabriel Mountains. 1006 Comment
  RSA65710  Silene antirrhina F. W. Peirson 1921-6-19 2681 Los Angeles North Fork of San Gabriel River 1006 Comment
  JEPS69139  Loeseliastrum matthewsii Frank W. Peirson 1921-5-19 952 Los Angeles Little Rock Creek San Gabriel Mts., Little Rock Creek 1036 Comment
  JEPS73669  Monardella exilis Frank W. Peirson 1921-5-19 2416 Los Angeles Little Rock Creek San Gabriel Mts. 1036 Comment
  LA38971  Mimulus guttatus Frank W. Peirson; 1921-6-19 4721 Los Angeles San Gabriel Mountains, Groverland Canyon, N fork San Gabriel River 1036 Comment
  RSA70372  Calochortus superbus Frank W. Peirson 1930-5-15 8898 Kern Hills northwest of Glenville, Greenhorn Range 1037 Comment
  RSA77163  Ceanothus leucodermis F. W. Peirson 1918-5-19 112 Los Angeles Dawn Station along the trolley to Mt. Lowe, San Gabriel Mts. 1037 Comment
  RSA83397  Monardella candicans F. W. Peirson 1930-5-15 8879 Kern Hills northwest of Glenville, Greenhorn Range. 1037 Comment
  RSA82050  Cordylanthus rigidus subsp. setiger F. W. Peirson 1924-7-11 5396 Los Angeles Mt. Washburn trail near Switzers Camp. 1037 Comment
  JEPS15754  Conium maculatum Frank W. Peirson 1920-5-18 2115 San Bernardino San Gabriel Mountains, Lytle Creek Lytle Creek; San Gabriel Mountains, Lytle Creek 1066 Comment
  JEPS54840  Astragalus palmeri Frank W. Peirson 1922-4-13 2899 San Diego Mountain Springs grade 1066 Comment
  JEPS55411  Lotus argophyllus var. argophyllus Frank W. Peirson 1918-5-26 96 Los Angeles Toll Road up Mt. Wilson 1066 Comment
  JEPS57766  Chorizanthe xanti Frank W. Peirson 1921-5-30 2419 San Bernardino Lone Pine Canyon , Lone Pine Canyon (San Gabriel Mountains) 1066 Comment
Read comments
Jul 18 2011
  JEPS63182  Trichostema parishii Frank W. Peirson 1921-7-1 2473 Los Angeles Arraster Creek San Gabriel Mountains 1066 Comment
  PASA1790  Chrysopsis villosa var. fastigiata Frank W. Peirson 1928-10-21 Los Angeles West Fork San Gabriel River 1066 Comment
  CAS-BOT-BC438076  Lithophragma parviflorum Frank W. Peirson 1930-5-15 8889 Kern hills nw of Glenville, Greenhorn mts. 1066 Comment
  PASA997  Collinsia bicolor Frank W. Peirson 1930-5-15 Kern Hills NW. of Glenville, Greenhorn Mts. 1066 Comment
  RSA0060162  Poa secunda subsp. secunda F. W. Peirson 1918-5-19 1548 Los Angeles Along trolley track on Echo Mt., San Gabriel Range. 1066 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
  RSA72104  Epilobium canum subsp. canum F. W. Peirson 1918-10-21 280 Los Angeles West Fork of San Gabriel Mountains. 1067 Comment
  RSA73066  Leptosiphon montanus F. W. Peirson 1930-5-15 8896 Kern Greenhorn Range, in hills northwest of Glenville 1067 Comment
  RSA75439  Camissonia ignota F. W. Peirson 1923-5-6 3505 Orange Trail to Santiago Peak, Santa Ana Ms., from Trabuco Canyon. 1067 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
  RSA76998  Staphylea bolanderi F. W. Peirson 1936-5-30 11819 Tulare About 4 miles above the control, on road to Balch Park. 1067 Comment
  RSA80176  Antirrhinum nuttallianum subsp. nuttallianum F. W. Peirson 1929-5-4 8346 San Diego On trail from Oak Grove to Palomar Mtn. 1067 Comment
  RSA80323  Hydrocotyle umbellata F. W. Peirson 1920-5-18 2141 San Bernardino Lytle Creek, east end of San Gabriel Mts. 1067 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
  RSA90381  Lotus strigosus F. W. Peirson 1929-5-4 8352 San Diego On trail from Oak Grove to Palomar Mtn. 1067 Comment
  RSA95003  Malacothrix glabrata F. W. Peirson 1920-5-19 2149 San Bernardino North Fork of Lytle Creek, San Gabriel Mts 1067 Comment
  RSA99376  Lonicera interrupta F. W. Peirson 1936-5-30 11816 Tulare About 4 miles above the control, on road to Balch Park. 1067 Comment
  PASA1796  Acamptopappus sphaerocephalus Frank W. Peirson 1930-4-29 San Bernardino Box S. Spring 1081 Comment
  RSA435264  Lythrum californicum F. W. Peirson 1924-8-31 3134 San Bernardino Box S Springs, southern Mojave Desert 1082 Comment
  RSA80725  Lythrum californicum F. W. Peirson 1924-8-31 5134 San Bernardino Box S Springs, southern Mojave Desert 1082 Comment
  RSA91977  Pleuraphis rigida F. W. Peirson 1924-5-14 54544 San Bernardino Box S Springs in Cushenberry [Cushenbury] Springs Region, north base of San Bernardino Mountains. 1082 Comment
  JEPS1430  Nama californica Frank W. Peirson 1921-5-29 2421 San Bernardino n slope Cajon Pass; San Gabriel Mountains, n slope Cajon Pass 1097 Comment
  JEPS34561  Syntrichopappus lemmonii F. W. Peirson 1921-5-29 1378 San Bernardino near Cajon Pass summit 1097 Comment
  RSA66783  Thysanocarpus laciniatus F. W. Peirson 1921-5-29 665 San Bernardino north slope of Cajon Pass 1097 Comment
  UC483075  Salix laevigata Frank W. Peirson 1923-5-27 9609 Los Angeles Pallett Creek San Gabriel Mts., Pallett Creek 1097 Comment
  PASA1488  Eriogonum pusillum Frank W. Peirson 1923-5-27 Los Angeles Pillett Creek, San Gabriel Mts. 1097 Comment
  RSA86959  Lupinus odoratus F. W. Peirson 1921-7-2 2477 Los Angeles Pallett Creek, lower Rock Creek tributary: north side of San Gabriel Mountains. 1098 Comment
  RSA64586  Eriogonum pusillum F. W. Peirson 1923-5-27 4203 Los Angeles Pallett Creek, north slope of San Gabriel Mountains 1098 Comment
  RSA92702  Salix laevigata F. W. Peirson 1923-5-27 9609 Los Angeles Pallett Creek, north slope of San Gabriel Mountains 1098 Comment
  RSA97433A  Lomatium mohavense subsp. mohavense F. W. Peirson 1922-5-12 2973 San Bernardino Old road through Cajon Pass 1098 Comment
  PASA2256  Ribes malvaceum Frank W. Peirson 1923-5-6 Orange Santiago Peak. Holy Jim Trail near spring 1142 Comment
  CAS-BOT-BC22481  Acamptopappus shockleyi Frank W. Peirson 1932-5-6 9903 Inyo Wildrose Canyon, Panamint Mountains 1143 Comment
  JEPS42399  Ceanothus integerrimus Frank W. Peirson 1918-5-26 111 Los Angeles Toll Rd San Gabriel Range, Mt. Wilson 1143 Comment
  UC501460  Clarkia heterandra Frank W. Peirson 1922-6-3 3083 Los Angeles n. slope Liebre Mts. (and sl. e. of the Collins Ranch house and extending up slope to ca. 5000 ft); Liebre Mts. and Collins Ranch 1143 Comment
  RSA70412  Arctostaphylos pungens F. W. Peirson 1922-4-13 2896 San Diego El Centro-San Diego road west of main summit. 1143 Comment
Read comments
Sep 2 2016
  RSA92692  Salix exigua F. W. Peirson 1932-5-6 9900 Inyo Wild Rose Canyon, Panamint Mts. 1143 Comment
  RSA93281  Pentachaeta aurea F. W. Peirson 1922-5-19 3037 Riverside San Jacinto River 1143 Comment
  UC218118  Clarkia heterandra F. W. Peirson 1922-6-3 Los Angeles Liebre Mts. 1143 Comment
  SD87630  Rigiopappus leptocladus F. W. Peirson 1922-6-3 Los Angeles North slope of Liebre Mts. road to Collins Ranch 1145 Comment
Read comments
Jul 10 2010
  CAS-BOT-BC515148  Eriastrum sapphirinum subsp. sapphirinum F. W. Peirson 1920-6-23 2299 San Diego Oak Grove 1158 Comment
  PASA1014  Collinsia callosa Frank W. Peirson 1922-6-3 Los Angeles East of Oak Grove Canyon Divide, Liebre Mts. 1173 Comment
  UC501463  Lessingia glandulifera var. peirsonii Frank W. Peirson 1923-6-9 3550 Los Angeles King Canyon Liebre Mts., King Canyon 1173 Comment
  RSA74959  Phacelia douglasii F. W. Peirson 1922-6-3 3085 Los Angeles East of Oak Grove Creek Divide, Liebre Mts. 1174 Comment
  RSA84951  Ribes quercetorum F. W. Peirson 1922-6-3 2548 Los Angeles East of Oak Grove Creek Divide, Liebre Mts. 1174 Comment
  JEPS19243  Hazardia squarrosa var. grindelioides Frank W. Peirson 1918-9-15 227 Los Angeles Sister Elsie Peak San Gabriel Mountains, Sister Elsie Peak 1219 Comment
  UC501452  Brickellia atractyloides Frank W. Peirson 1932-5-6 9896 Inyo 8 mi e of Darwin 1219 Comment
  PASA91  Cordylanthus rigidus subsp. brevibracteatus Frank W. Peirson 1921-11-12 Los Angeles Collin's Ranch, north slope Liebre Mts., about 4000ft. 1219 Comment
  RSA65506  Minuartia douglasii F. W. Peirson 1921-5-3 5315 Los Angeles Bear Canyon Ridge west of Mt. Lowe 1219 Comment
  RSA65785  Cleomella plocasperma F. W. Peirson 1916-7-8 1920 San Bernardino Open land above Box S Spring, grade near Cushenberry Spring. north base of San Bernardino Mountains. 1220 Comment
  RSA73317  Clarkia cylindrica subsp. cylindrica F. W. Peirson 1922-6-3 771 Los Angeles North slope of Liebre Mts. 1220 Comment
  RSA82576  Stachys rigida subsp. quercetorum F. W. Peirson 1923-9-7 4039 Orange Santa Ana Mountains; Trail Trabuco Canyon to Santago Peak. 1220 Comment
  RSA75428  Camissonia walkeri subsp. tortilis F. W. Peirson 1932-5-6 9895 Inyo Gravelly stream terrace, 5 miles east of Darwin. 1220 Comment
  RSA79905  Physalis philadelphica F. W. Peirson 1923-8-26 3996 San Bernardino above road to Seven Oaks, in Mill Creek. 1220 Comment
  RSA87336  Lupinus concinnus subsp. orcuttii F. W. Peirson 1921-5-29 544 San Bernardino Summit of Cajon Pass. 1220 Comment
  RSA90072  Lotus argophyllus var. argophyllus F. W. Peirson 1924-5-16 4581 San Bernardino City Creek. 1220 Comment
  RSA93720  Brickellia arguta F. W. Peirson 1932-5-6 9896 Inyo 8 mi. E of Darwin 1220 Comment
  RSA94667  Senecio douglasii var. monoensis F. W. Peirson 1932-5-6 9897 Inyo 8 miles east of Darwin 1220 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
  CAS-BOT-BC106330  Brickellia atractyloides var. arguta Frank W. Peirson 1932-5-9 9951 Inyo Keane Spring, Funeral Mts. 1249 Comment
  CAS-BOT-BC76267  Arctomecon merriamii Frank W. Peirson 1932-5-9 9945 Inyo Keane Spring, Funeral Mountains. 1249 Comment
  JEPS26404  Malacothamnus orbiculatus Frank W. Peirson 1919-6-15 502 Los Angeles San Gabriel Mountains, Rock Creek 1249 Comment
  RSA81451  Castilleja plagiotoma F. W. Peirson 1918-6-18 210 Los Angeles Rock Creek, north base of San Gabriel Mountains. 1250 Comment
  RSA86363  Pinus monophylla F. W. Peirson 1919-6-15 2328 Los Angeles Rock Creek 1250 Comment
  RSA73025  Linanthus parryae F. W. Peirson 1926-5-8 6729 Los Angeles Road to Los Angeles County playgrounds about 1/4 mile from Rock Creek north slope of San Gabriel Mtns. 1250 Comment
  RSA71006  Cuscuta ceanothi F. W. Peirson 1923-9-7 4037 Orange Trail from Trabuco Canyon to Santiago Peak. 1280 Comment
  RSA85069  Agrimonia gryposepala F. W. Peirson 1924-7-16 4975 San Bernardino Potato Canyon, south slope of the San Bernardino Mts. 1280 Comment
  JEPS51887  Chamaesyce albomarginata Frank W. Peirson 1919-6-13 459 Los Angeles San Gabriel Mtns, Rock Creek Canyon 1295 Comment
  JEPS55743  Lotus oblongifolius var. oblongifolius Frank W. Peirson 1919-6-15 501 Los Angeles Rock Creek San Gabriel Mountains 1295 Comment
  JEPS8877  Chaenactis stevioides Frank W. Peirson 1923-5-25 3522 Los Angeles Rock Creek San Gabriel Mountains, Rock Creek 1295 Comment
  PASA2116  Nemophila menziesii Frank W. Peirson 1929-5-4 San Diego Palomar, east trail 1295 Comment
  SBBG28525  Frangula californica subsp. cuspidata F. W. Peirson 1919-6-15 727 Los Angeles Rock Crk, N slope 1295 Comment
  JEPS63352  Monardella macrantha Frank W. Peirson 1918-7-13 183 Los Angeles trail near Studevants; San Gabriel Mts., West Fork San Gabriel River 1295 Comment
  SD87551  Leptosiphon breviculus Frank W. Peirson 1926-4-27 6665 Unknown Rock Creek, San Gabriel Range. 1295 Comment
Read comments
Jan 1 2016
  POM175480  Rhamnus tomentella subsp. cuspidata F. W. Peirson 1919-6-15 727 Los Angeles Rock Creek, north slope of San Gabriel Mountains. 1296 Comment
  RSA69881  Forestiera pubescens F. W. Peirson 1919-6-13 483 Los Angeles Large colony on south side of canyon of Rock Creek. 1296 Comment
  RSA70081  Platanthera sparsiflora Frank W. Peirson 1919-6-15 505 Los Angeles Rock Creek, north slope of San Gabriel Mountains. 1296 Comment
  RSA74179  Phacelia cryptantha F. W. Peirson 1923-5-25 3529 Los Angeles Rock Creek, north slope of San Gabriel Mountains 1296 Comment
  RSA74928  Phacelia egena F. W. Peirson 1942-5-15 13463 Los Angeles Rock Creek. 1296 Comment
  RSA97415  Tauschia parishii F. W. Peirson 1926-4-27 6670 Los Angeles San Gabriel Mountains. North side of San Gabriel Mountains, Rock Creek. 1296 Comment
  JEPS34066  Gnaphalium palustre F. W. Peirson 1918-7-9 234 Los Angeles San Antonio Canyon San Gabriel Mts., San Antonio Canyon 1341 Comment
  JEPS60560  Clematis ligusticifolia Frank W. Peirson 1918-10-21 52 Los Angeles San Antonio Canyon 1341 Comment
  JEPS7146  Plantago major Frank W. Peirson 1919-6-5 462 Los Angeles San Antonio Canyon San Gabriel Mountains 1341 Comment
  PASA2230  Heuchera elegans Frank W. Peirson 1922-5-30 Los Angeles West spur of Mt. Lowe 1341 Comment
  RSA70850  Arctostaphylos glandulosa subsp. mollis F. W. Peirson 1920-5-9 142 Los Angeles east trail to Mt. Lowe 1341 Comment
  RSA75882  Nemophila menziesii var. integrifolia F. W. Peirson 1920-5-8 2739 San Bernardino San Antonio Canyon. 1341 Comment
  RSA0063270  Heuchera elegans F. W. Peirson 1922-5-30 67 Los Angeles West spur of Mt Lowe, San Gabriel Mountains. 1341 Comment
  RSA90888  Ericameria pinifolia F. W. Peirson 1918-11-25 2752 San Bernardino San Antonio Canyon, San Gabriel Mts. 1341 Comment
  RSA65500  Arenaria macradenia var. arcuifolia F. W. Peirson 1929-7-1 8430 Los Angeles Aliso Creek at Tie Canyon. 1356 Comment
  RSA75442  Camissonia hirtella F. W. Peirson 1929-6-30 8421 Los Angeles Clearing below the road near Tie Canyon stream; Aliso Creek, San Gabriel Mts. 1357 Comment
  CAS-BOT-BC207241  Lupinus peirsonii Frank W. Peirson 1930-5-30 8904 Los Angeles Rock Cr., San Gabriel Range 1371 Comment
  CAS-BOT-BC207252  Lupinus peirsonii Frank W. Peirson 1930-5-30 8904 Los Angeles Rock Creek, San Gabriel Mts. 1371 Comment
  JEPS26956  Senecio astephanus Frank W. Peirson 1920-6-10 1432 Los Angeles near Inspiration Point (on Mt. Lowe); San Gabriel Mts., Mt. Lowe 1371 Comment
  JEPS43825  Clarkia dudleyana Frank W. Peirson 1919-6-7 466 Los Angeles Cow Canyon Divide San Gabriel Mountains 1371 Comment
  JEPS47607  Allium cratericola Frank W. Peirson 1922-5-21 3069 Riverside small side canyon, on e side of Hemet Valley San Jacinto Mts., Hemet Valley 1371 Comment
  RSA90215  Astragalus filipes F. W. Peirson 1922-5-20 3341 Riverside Hemet Valley, San Jacinto Mountains. 1371 Comment
  RSA69985  Mirabilis pumila F. W. Peirson 1920-8-26 2257 San Bernardino Santa Ana River, San Bernardino Mountains. 1372 Comment
  RSA74955  Phacelia curvipes F. W. Peirson 1929-5-4 8354 San Diego Along trail from Oak Grove to Palomar Mt. 1372 Comment
  RSA86802  Rosa californica F. W. Peirson 1920-8-26 s.n. San Bernardino Santa Ana River 1372 Comment
  POM9778  Collinsia parryi F. W. Peirson 1920-5-28 2156 Los Angeles San Antonio Mountains: Bear Canyon 1372 Comment
  RSA0004551  Oenothera kernensis F. W. Peirson 1930-5-13 8822 Kern East slope of Walker Pass, Freeman Canyon. 1372 Comment
  RSA66738  Eschscholzia caespitosa subsp. caespitosa F. W. Peirson 1921-7-16 2503 Los Angeles East fork of San Gabriel River. 1372 Comment
  PASA2571  Myosurus aristatus Frank W. Peirson 1922-5-20 3035 Riverside Helmet Valley, San Jacinto Mtns. 1386 Comment
  JEPS27935  Balsamorhiza deltoidea Frank W. Peirson 1941-5-31 13079 Fresno Kings River, Cedar Grove 1402 Comment
  RSA65685  Lewisia brachycalyx F. W. Peirson 1925-5-18 5990 San Diego Cuyamaca Lake, north of dam 1402 Comment
  RSA70204  Allium amplectens F. W. Peirson 1925-5-18 5986 San Diego Camp ground at Cuyamaca Lake 1402 Comment
  UC912302  Micropus californicus Frank W. Peirson 1925-5-18 5981 San Diego roadside near Automobile Camp (Cuyamaca Laek); Cuyamaca Lake 1402 Comment
  RSA0017275  Gilia ochroleuca subsp. exilis F. W. Peirson 1938-5-30 12413 Riverside Thomas Mountain, Hemet Valley. 1402 Comment
  RSA91412  Trifolium albopurpureum F. W. Peirson 1925-5-18 5974 San Diego North shore of Cyamaca Lake 1402 Comment
  RSA93329  Downingia concolor var. brevior F. W. Peirson 1925-5-19 5982 San Diego Cuyamaca Lake 1402 Comment
Read comments
Mar 21 2014
  SD87560  Linanthus orcuttii Frank W. Peirson 1920-6-24 2173 San Diego Ridge westward from Palomar Peak (IPB 2/06) 1431 Comment
  CAS-BOT-BC114141  Cyperus squarrosus Frank Warrington Peirson 1920-6-22 2684 San Diego Meadow at east foot of Morgan Hill, Palomar Mts. 1432 Comment
  JEPS61293  Mirabilis pumila Frank W. Peirson 1922-8-27 3288 San Bernardino Santa Ana River; San Bernardino Mts, Santa Ana River 1432 Comment
  UC501427  Navarretia leptalea subsp. leptalea Frank W. Peirson 1932-7-9 10288 Shasta Burney Spring 1432 Comment
  UC501512  Sidalcea oregana subsp. spicata Frank W. Peirson 1932-7-9 10273 Shasta Burney Spring 1432 Comment
  UCD85951  Koeleria macrantha F. W. Peirson 1932-7-9 10266 Shasta Burney Spring. 1432 Comment
  RSA65032  Silene occidentalis F. W. Peirson 1932-7-16 10307 Shasta Burney Spring. 1433 Comment
  RSA69612  Lilaea scilloides F. W. Peirson 1924-6-24 4830 San Diego South of Cuyamaca Lake. 1433 Comment
  RSA73687  Linanthus orcuttii subsp. pacificus F. W. Peirson 1920-6-24 2173 San Diego Meadow east of Morgan Hill; Palomar Mts. 1433 Comment
  RSA87124  Koeleria macrantha F. W. Peirson 1932-7-9 10266 Shasta along water course below Burney Spring 1433 Comment
  RSA66729  Galium bolanderi F. W. Peirson 1932-7-16 10300 Shasta Burney Spring. 1433 Comment
  RSA92104  Cyperus squarrosus F. W. Peirson 1920-6-22 2684 San Diego East foot of Morgan Hill, Palomar Mountains 1433 Comment
  RSA93094  Erigeron philadelphicus F. W. Peirson 1932-7-16 10313 Shasta Near stream from Burney Springs 1433 Comment
  RSA73349  Clarkia xantiana subsp. parviflora F. W. Peirson 1919-6-5 5307 Los Angeles San Antonio Canyon, along stream bed above bridge. 1448 Comment
  RSA75361  Camissonia boothii subsp. desertorum F. W. Peirson 1938-7-10 12459 Mono Alluvial cone along west slope of White Mountains, directly below the old Devernois Ranch 1463 Comment
  UC501555  Scirpus congdonii Frank W. Peirson 1932-7-19 10348 Plumas Feather River near Chester; Feather River near Chester 1463 Comment
  RSA65955  Eriogonum umbellatum var. polyanthum F. W. Peirson 1932-7-16 10303 Shasta 1 mi. above Burney Spring, on road to Thousand- Lake Basin. 1463 Comment
  RSA75396  Camissonia strigulosa F. W. Peirson 1928-6-2 7948 Los Angeles Open clearing, south fork of Rock Creek, San Gabriel Range 1463 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
  POM254663  Atriplex rosea F. W. Peirson 1923-8-30 4009 San Bernardino Northeast part of San Gabriel Mts., Lone Pine Canyon, Clyde Ranch. 1479 Comment
  RSA69270  Chimaphila menziesii F. W. Peirson 1924-6-22 4803 San Diego About 2 miles west of cmp, Doane Valley, Palomar Mts. 1494 Comment
  RSA93080  Solidago confinis F. W. Peirson 1923-8-30 4025 San Bernardino Northeast part of San Gabriel Range; Clyde Ranch to Lone Pine Canyon. 1494 Comment
  PASA1812  Corethrogyne filaginifolia Frank W. Peirson 1926-9-5 San Bernardino Arrowhead Lake, San Bernardino Mts. 1523 Comment
  CAS-BOT-BC205528  Sidalcea hickmanii subsp. parishii Frank W. Peirson 1924-7-16 4971 San Bernardino Barton Flats Road, San Bernardino Mts. 1524 Comment
  JEPS18979  Gutierrezia microcephala Frank W. Peirson 1923-9-1 4016 Los Angeles Sheep Creek San Gabriel Mountains, Sheep Creek 1524 Comment
Read comments
Aug 14 2013
  JEPS31580  Camissoniopsis pallida subsp. pallida Frank W. Peirson 1919-6-14 478 Los Angeles Rock Creek San Gabriel Mountains 1524 Comment
  JEPS31639  Calystegia peirsonii F. W. Peirson 1927-5-21 7301 Los Angeles Rock Creek , Rock Creek (San Gabriel Range) 1524 Comment
  JEPS31698  Eremothera boothii subsp. decorticans Frank W. Peirson 1919-6-14 479 Los Angeles Rock Creek San Gabriel Mountains 1524 Comment
  JEPS46353  Swertia neglecta Frank W. Peirson 1918-6-17 145 Los Angeles n side San Gabriel Mts; San Gabriel Mts., Rock Creek 1524 Comment
  JEPS9776  Castilleja miniata Frank W. Peirson 1919-6-14 490 Los Angeles Big Rock Creek; San Gabriel Mountains 1524 Comment
Read comments
Jan 31 2008
  RSA71096  Calystegia peirsonii F. W. Peirson 1927-5-21 7301 Los Angeles Rock Creek, north base of San Gabriel Mountains. 1524 Comment
  RSA73029  Leptosiphon breviculus F. W. Peirson 1928-9-5 7082 San Bernardino Along shores of Arrowhead Lake. 1524 Comment
  RSA80694  Epilobium densiflorum F. W. Peirson 1907-7-9 2085 Los Angeles Pine Flats, San Gabriel Mts. 1524 Comment
  RSA82251  Castilleja miniata F. W. Peirson 1924-6-25 4844 San Diego Laguna Mountains: Meadow near Laguna Lakes. 1524 Comment
Read comments
Jan 31 2008
  RSA84267  Ranunculus aquatilis var. capillaceus F. W. Peirson 1924-6-27 4864 San Diego ponds at Laguna Lakes 1524 Comment
  RSA85241  Horkelia rydbergii F. W. Peirson 1921-6-16 2448 Los Angeles Pine Flats. 1524 Comment
Read comments
Jul 29 2016
  RSA86834  Rubus ursinus F. W. Peirson 1924-6-24 4814 San Diego Henshaw Grade, south slope of Palomar Mts. 1524 Comment
  RSA87350  Galium andrewsii F. W. Peirson 1920-6-24 4499 San Diego On east trail to Palomar Mtn. 1524 Comment
  RSA0105526  Eriastrum densifolium subsp. austromontanum F. W. Peirson 1906-8-16 4127 San Bernardino Santa Ana River, near Seven Oaks. 1524 Comment
  RSA72651  Helianthella californica var. nevadensis F. W. Peirson 1932-7-16 10301 Shasta On trail to Thousand-Lake Basin. 1524 Comment
  RSA80701  Circaea alpina subsp. pacifica F. W. Peirson 1908-7-10 2089 Tulare Nelson, on Tule River, Sierra Nevada 1524 Comment
  RSA92425  Helianthus gracilentus F. W. Peirson 1929-8-23 8581 San Bernardino City Creek Grade below Fredalba 1524 Comment
  RSA92654  Salix lasiolepis F. W. Peirson 1933-4-14 10648 Riverside Road between Banning and Idyllwild. 1524 Comment
  RSA94948  Tetradymia canescens F. W. Peirson 1927-7-25 7547 Inyo grade up Volcanic Table land north of Bishop 1524 Comment
  RSA97228  Garrya flavescens var. pallida F. W. Peirson 1921-3-21 4464 Riverside Gordon trail from Andreas Canyon, San Jacinto Mts. 1524 Comment
  RSA71003  Cuscuta ceanothi F. W. Peirson 1924-7-29 5036 Riverside Banning to Idyllwild Rd. 1555 Comment
  RSA91699  Gnaphalium palustre F. W. Peirson 1924-7-29 5030 Riverside Banning to Idyllwild road, San Jacinto Mountains. 1570 Comment
  JEPS85628  Keckiella ternata var. ternata Frank W. Peirson 1918-8-6 263 Los Angeles Mt. Wilson; San Gabriel Mountains 1584 Comment
  CAS-BOT-BC346368  Psorothamnus arborescens Frank W. Peirson 1938-7-10 12453 Mono W slope of the White Mountains 1584 Comment
  RSA70217  Allium campanulatum F. W. Peirson 1924-6-22 4797 San Diego Near the Country Club, Mt. Palomar. 1585 Comment
  RSA90229  Astragalus douglasii F. W. Peirson 1924-6-22 4799 San Diego Near the Country Club, Mt. Palomar. 1585 Comment
  CAS-BOT-BC226205  Gilia interior F. W. Peirson 1930-5-14 8856 Kern On road from Kernville to Glenville [Glennville], Greenhorn Range 1600 Comment
  RSA77734  Viola purpurea subsp. quercetorum F. W. Peirson 1930-5-14 8857 Kern On road from Kernville to Glenville, Greenhorn Range 1601 Comment
  RSA73358  Clarkia rhomboidea F. W. Peirson 1924-6-22 4784 San Diego At Country Club, Palomar Mts. 1616 Comment
  RSA79849  Penstemon labrosus F. W. Peirson 1924-6-22 4790 San Diego At Country Club, Palomar Mts. 1616 Comment
  RSA0104954  Sedum spathulifolium F. W. Peirson 1922-6-26 4432 San Bernardino Barton Flats road, near Glen Martin, San Bernardino Mts. 1616 Comment
  JEPS40141  Arceuthobium campylopodum Frank W. Peirson 1921-6-15 2322 Los Angeles near Chilao San Gabriel Mtns 1645 Comment
  CAS-BOT-BC219187  Ribes nevadense Frank W. Peirson 1919-5-10 688 Los Angeles Trail from Arraster Creek, Mount Gleason, San Gabriel Mountains 1676 Comment
  CAS-BOT-BC9457  Mimulus diffusus Frank Warrington Peirson 1925-5-15 5919 San Diego Laguna Lakes, Laguna Mtns. 1676 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
  LA38962  Mimulus palmeri Frank W. Peirson; 1925-5-15 5919 San Diego Laguna Lakes auto camp, N of camp 1676 Comment
  UC511783  Phacelia davidsonii Frank W. Peirson 1925-5-15 5915 San Diego Laguna Lakes Auto Camp Laguna Mts. 1676 Comment
  UC581530  Viola lobata subsp. integrifolia Frank W. Peirson 1925-5-19 5996 a San Diego Middle Peak; Cuyamaca Mountains, Middle Peak 1676 Comment
  PASA2282  Antennaria dimorpha Frank W. Peirson 1921-6-15 Los Angeles Pine Flats, San Gabriel Mts. 1676 Comment
  RSA84474  Ceratophyllum demersum F. W. Peirson 1921-6-19 2614 Los Angeles Crystal Lake, North Fork San Gabriel River 1676 Comment
  RSA91741  Gnaphalium stramineum F. W. Peirson 1921-6-19 2583 Los Angeles Crystal Lake, North Fork San Gabriel River 1676 Comment
  POM19058  Viola sheltonii F. W. Peirson 1923-5-6 3496 Orange Santiago Peak. 1677 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
  RSA70378  Euphorbia palmeri F. W. Peirson 1920-6-24 2201 San Diego On east trail to Palomar Mtn. 1677 Comment
  RSA71882  Gilia diegensis F. W. Peirson 1920-6-24 2294 San Diego On east trail to Palomar Mtn. 1677 Comment
  RSA73345  Clarkia xantiana F. W. Peirson 1928-6-2 7943 Los Angeles Trail up South Fork of Rock Creek. 1677 Comment
  RSA74935  Phacelia davidsonii F. W. Peirson 1923-5-6 3499 Orange Summit of Santiago Peak. 1677 Comment
  RSA74937  Phacelia davidsonii F. W. Peirson 1921-6-14 2826 Los Angeles San Gabriel Mountains. Pine Flats, headwaters of Tujunga Creek. 1677 Comment
  RSA74942  Phacelia davidsonii F. W. Peirson 1925-5-15 5915 San Diego Public Camp, laguna Mts 1677 Comment
  RSA76781  Saltugilia caruifolia F. W. Peirson 1920-6-24 2295 San Diego Trail from Oak Grove to Palomar Mountain 1677 Comment
  RSA77438  Angelica tomentosa F. W. Peirson 1924-7-29 5024 Riverside Open Mountain slope on road from Banning to Idyllwild, San Jacinto Mountains. 1677 Comment
  RSA77702  Ceanothus palmeri F. W. Peirson 1920-6-24 4193 San Diego West of summit of Mt. Palomar, [Palomar Mountains]. 1677 Comment
  RSA80745  Cryptantha oxygona F. W. Peirson 1921-6-15 2463 Los Angeles Trail from Pine Flats to Chilao 1677 Comment
  RSA84842  Ribes nevadense F. W. Peirson 1919-5-10 688 Los Angeles Trail from Arraster [Arrastre] Creek to Mt. Gleason, San Gabriel Mts. 1677 Comment
Read comments
Aug 21 2014
  RSA0070618  Cirsium douglasii var. breweri F. W. Peirson 1926-6-22 6824 Lassen Near Hot Springs, Drakesbad, Mount Lassen National Park. 1677 Comment
  RSA75504  Phacelia brachyloba F. W. Peirson 1924-7-16 4969 San Bernardino Road to Barton Flats, San Bernardino Mts. 1677 Comment
  RSA91249  Vicia americana F. W. Peirson 1920-6-24 2175 a San Diego Trail from Oak Grove to Palomar Mountain 1677 Comment
  RSA91286  Lessingia glandulifera var. glandulifera F. W. Peirson 1933-7-28 10710 Mono Sherwin Grade, Owens Valley (north of Bishop) 1677 Comment
  RSA97160  Lomatium dissectum var. multifidum F. W. Peirson 1920-5-19 2153 San Bernardino Coldwater Canyon, fork of Lytle Creek, San Gabriel Mountains 1677 Comment
  JEPS17041  Lomatium nevadense var. parishii Frank W. Peirson 1919-6-14 473 Los Angeles San Gabriel Mts., Rock Creek canyon 1706 Comment
  JEPS50882  Silene verecunda subsp. platyota Frank W. Peirson 1919-6-14 474 Los Angeles Rock Creek San Gabriel Mountains, Rock Creek 1706 Comment
  RSA65063  Silene verecunda subsp. platyota F. W. Peirson 1919-6-14 474 Los Angeles Rock Creek, north slope of San Gabriel Mountains 1707 Comment
  RSA90390  Lotus strigosus F. W. Peirson 1918-5-26 323 Los Angeles Summit of Mt. Wilson. 1707 Comment
  JEPS19910  Arctostaphylos parryana Frank W. Peirson 1919-5-10 429 Los Angeles Mt. Gleason 1737 Comment
Read comments
Aug 21 2014
  JEPS4691  Mimulus johnstonii F. W. Peirson 1918-6-30 196 Los Angeles summit Mt. Wilson; San Gabriel Mts. 1737 Comment
  RSA73058  Leptosiphon ciliatus F. W. Peirson 1920-6-10 2790 Los Angeles San Gabriel Mts., summit of Mt. Wilson 1738 Comment
  RSA66340  Eriogonum davidsonii F. W. Peirson 1919-7-29 18 Los Angeles Summit of Mt. Wilson, San Gabriel Mountains 1738 Comment
  UCR129355  Heuchera elegans F. W. Peirson 1924-5-27 4639 Los Angeles San Gabriel Mtns., north slope, Strawberry Peak 1753 Comment
  CAS-BOT-BC109457  Sidotheca caryophylloides Frank W. Peirson 1924-7-29 5019 Riverside San Jacinto Mountains. Banning-Idlewild Road. 1767 Comment
  PASA2373  Euonymus parishii Frank W. Peirson 1924-7-27 Riverside Dark Canyon, San Jacinto Mts. 1767 Comment
  RSA72996  Leptosiphon breviculus F. W. Peirson 1924-5-15 4564 San Bernardino Cactus Flat, San Bernardino Mts. level open place on hills. 1768 Comment
  RSA76931  Euonymus occidentalis var. parishii F. W. Peirson 1924-7-27 4983 Riverside Dark Canyon, San Jacinto Mts. 1768 Comment
  CAS-BOT-BC221192  Calystegia malacophylla subsp. pedicellata Frank W. Peirson 1923-6-10 3555 Ventura Seymour Creek, Mt. Pinos 1798 Comment
  CAS-BOT-BC90796  Artemisia ludoviciana subsp. ludoviciana F. W. Peirson 1923-9-1 3197 San Bernardino Ranger Station, Swartout Valley, north slope of San Gabriel Mts. 1798 Comment
  JEPS54731  Astragalus lentiginosus var. antonius Frank W. Peirson 1922-7-7 3194 Los Angeles Ranger's Cabin Swartout Valley (San Gabriel Mountains); , Swartout Valley 1798 Comment
  RSA70245  Allium howellii var. clokeyi F. W. Peirson 1923-6-10 3598 Ventura Seymour Creek, Mt. Pinos. 1799 Comment
  RSA86290  Ivesia saxosa F. W. Peirson 1924-5-15 4605 San Bernardino Cactus Flat. 1799 Comment
  RSA88859  Carex praegracilis F. W. Peirson 1922-7-6 3176 San Bernardino Rangers Cabin, Swartout Valley, north side of San Gabriel Mountains. 1799 Comment
  RSA0017070  Gilia ochroleuca subsp. bizonata F. W. Peirson 1923-6-10 3582 Ventura Seymour Creek, Mt. Pinos. 1799 Comment
  RSA90412  Lotus oblongifolius F. W. Peirson 1924-7-28 5018 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
  RSA91393  Trifolium cyathiferum F. W. Peirson 1922-7-29 3217 Ventura Seymour Creek, Mt. Pinos. 1799 Comment
  CAS-BOT-BC6696  Phacelia austromontana Frank Warrington Peirson 1928-6-2 7940 Los Angeles San Gabriel Mts., S. Fork Rock Cr. 1828 Comment
  JEPS17817  Calochortus splendens Frank W. Peirson 1924-6-27 4858 San Diego near Little Lake; Laguna Mts. 1828 Comment
  JEPS2116  Phacelia austromontana Frank W. Peirson 1928-6-2 7940 Los Angeles South Fork Rock Creek San Gabriel Range 1828 Comment
  JEPS44949  Prunus emarginata Frank W. Peirson 1919-6-16 492 Los Angeles South Fork Rock Creek 1828 Comment
  PASA1520  Viola douglasii Frank W. Peirson 1925-5-15 San Diego Laguna Lakes Auto Camp, Laguna Mts. 1828 Comment
  RSA171916  Astragalus cimae var. cimae F. W. Peirson 1930-4-16 8738 San Bernardino Summit of grade on Cima Road, over New York Mountains 1828 Comment
  RSA85313  Mahonia dictyota F. W. Peirson 1923-8-30 11701 San Bernardino Colony on south side of road a short distance west of the Lone Pine Canyon divide, Swartout Valley. 1828 Comment
  UC501634  Lessingia tenuis Frank W. Peirson 1922-7-31 3242 Ventura Seymour Creek Mt. Pinos Region, Seymour Creek 1828 Comment
  CAS-BOT-BC421027  Polygonum spergulariiforme Frank W. Peirson 1931-8-10 9564 Nevada Donner Lake 1828 Comment
  CAS-BOT-BC428418  Lithophragma tenellum F. W. Peirson 1921-6-16 2442 Los Angeles Trail north of Mt. Waterman, San Gabriel Mts. 1828 Comment
  POM11374  Keckiella breviflora F. W. Peirson 1922-7-29 3237 Ventura Seymour Creek, Mt. Pinos. 1829 Comment
  RSA66198  Arabis pulchra F. W. Peirson 1924-5-15 4568 San Bernardino Cactus Flat 1829 Comment
  RSA70583  Sisyrinchium bellum Frank W. Peirson 1918-7-8 11 San Bernardino San Antonio Canyon, Los Angeles-San Bernardino County Line 1829 Comment
  RSA73015  Leptosiphon pygmaeus subsp. pygmaeus F. W. Peirson 1925-5-15 5924 San Diego Laguna Lakes, Laguna Mountains 1829 Comment
  RSA82036  Cordylanthus nevinii F. W. Peirson 1920-9-15 2248 San Bernardino North Fork of Lytle Creek 1829 Comment
  POM354311  Phoradendron densum F. W. Peirson 1922-7-2 3251 Ventura Saymouer Cr.-Mt. Pinos 1829 Comment
  RSA66043  Eriogonum baileyi var. baileyi F. W. Peirson 1922-7-31 3243 Ventura Seymour Creek. 1829 Comment
  RSA69254  Pleuricospora fimbriolata F. W. Peirson 1919-8-15 840 Tulare Giant Forest, Sierra Nevada. 1829 Comment
  RSA80108  Mimulus breweri F. W. Peirson 1932-7-25 10407 Tuolumne Sonora Road along the Stanislaus River 1829 Comment
  RSA82330  Scutellaria californica F. W. Peirson 1931-8-10 9562 Nevada Near west end of Donner Lake. 1829 Comment
  RSA90372  Lotus nevadensis F. W. Peirson 1931-8-10 9561 Nevada West of Donner Lake. 1829 Comment
  RSA92147  Bulbostylis capillaris F. W. Peirson 1932-7-25 10405 Tuolumne Sonora Road along the Stanislaus River 1829 Comment
  RSA92522  Viguiera multiflora var. nevadensis F. W. Peirson 1932-5-7 9912 Inyo North Fork of Hanaupah Canyon, Panamint Mountains 1829 Comment
  RSA92903  Madia elegans F. W. Peirson 1922-7-31 4240 Ventura Seymour Creek. 1829 Comment
  RSA95283  Rhamnus tomentella subsp. tomentella F. W. Peirson 1922-7-29 3256 Ventura Seymour Creek, Mt Pinos 1829 Comment
  RSA99373  Lonicera interrupta F. W. Peirson 1922-7-29 4505 Ventura Seymour Creek, Mt. Pinos. 1829 Comment
  PASA913  Agoseris heterophylla Frank W. Peirson 1922-7-7 San Bernardino Swartout Valley 1843 Comment
  POM99353  Symphoricarpos rotundifolius var. parishii F. W. Peirson 1921-6-17 2439 Los Angeles along stream north of Mt Waterman. San Gabriel Mountains. 1859 Comment
  RSA74720  Nama densa F. W. Peirson 1938-7-8 12421 Mono Sherwin Grade. 1890 Comment
  RSA74723  Nama aretioides F. W. Peirson 1938-7-8 s.n. Mono Sherwin Grade. 1890 Comment
  RSA91263  Lupinus latifolius subsp. parishii F. W. Peirson 1922-7-29 3257 Ventura Seymour Creek, Mt. Pinos. 1890 Comment
  PASA1902  Gayophytum caesium Frank W. Peirson 1925-7-1 El Dorado Lake Tahoe 1904 Comment
  SEINET180137 Image available Muhlenbergia richardsonis Frank W. Peirson 1935-8-2 El Dorado State Line Lake Tahoe. 1905 Comment
  UC555562  Horkelia fusca subsp. parviflora Frank W. Peirson 1925-7-1 6184 El Dorado State Line Lake Tahoe 1905 Comment
  RSA0081611  Pyrola aphylla F. W. Peirson 1924-7-27 4988 Riverside Dark Canyon, San Jacinto Mts. 1905 Comment
  RSA298500  Calystegia occidentalis subsp. fulcrata F. W. Peirson 1919-6-14 497 Los Angeles Rock Creek. 1905 Comment
  RSA65045  Silene lemmonii F. W. Peirson 1925-7-2 6217 El Dorado On south side of Lake Tahoe. 1905 Comment
  RSA65643  Montia linearis F. W. Peirson 1925-7-1 6189 El Dorado State Line, Lake Tahoe 1905 Comment
  RSA72117  Epilobium oregonense F. W. Peirson 1925-7-1 6197 El Dorado State Line, Lake Tahoe. Sierra Nevada. 1905 Comment
  RSA85791  Drymocallis glandulosa var. reflexa F. W. Peirson 1928-6-2 7936 Los Angeles Along trail up South Fork of Rock Creek, 1905 Comment
  RSA92132  Eleocharis palustris F. W. Peirson 1925-7-2 6206 El Dorado On south side of 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
  JEPS5603  Delphinium gracilentum Frank W. Peirson 1936-5-30 11825 Tulare along wood road Balch Park 1920 Comment
  JEPS61812  Disporum hookeri Frank W. Peirson 1936-5-30 11824 Tulare Balch Park 1920 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
  SD87626  Malacothamnus fasciculatus F. W. Peirson 1922-7-30 3247 Ventura Mt. Pinos, south fork of Seymour Creek. 1920 Comment
  UCR136622  Collinsia parviflora F. W. Peirson 1922-6-24 3141 San Bernardino San Bernardino Mtns., Santa Ana River at the South Fork 1921 Comment
  RSA79858  Penstemon speciosus F. W. Peirson 1931-8-10 9549 El Dorado Along boulevard on west shore of Lake Tahoe. 1921 Comment
  RSA91232  Alnus rhombifolia F. W. Peirson 1924-7-12 4930 San Bernardino Santa Ana River. 1921 Comment
  RSA95229  Stephanomeria lactucina F. W. Peirson 1931-8-10 9550 El Dorado Along boulevard on west shore of Lake Tahoe. 1921 Comment
  RSA65019  Silene menziesii subsp. dorrii F. W. Peirson 1922-6-24 4287 San Bernardino Santa Ana River 1936 Comment
  JEPS1462  Phacelia bicolor var. bicolor F. W. Peirson 1934-7-8 Mono Sherwin Hill 1950 Comment
  JEPS18583  Brickellia microphylla var. microphylla F. W. Peirson 1934-7-30 Mono Sherwin Hill 1950 Comment
  JEPS56727  Eriogonum microthecum var. ambiguum Frank W. Peirson 1934-7-8 11159 Mono Sherwin Hill 1950 Comment
  UC501559  Deschampsia cespitosa subsp. cespitosa Frank W. Peirson 1932-7-12 10106 Shasta 1000-Lake Basin s. of Burney (along shore of Lake Eiler); 1000-Lake Basin, Lake Eiler 1950 Comment
  UC501608  Juncus orthophyllus Frank W. Peirson 1932-7-13 10123 Shasta s of Burney; 1000-Lake Basin 1950 Comment
  CAS-BOT-BC464498  Allium campanulatum F. W. Peirson 1932-7-12 s.n. Shasta 1000- Lake Basin 1950 Comment
  UC501480  Hypericum formosum var. scouleri Frank W. Peirson 1922-6-30 3241 Ventura Mt. Pinos Region, Seymour Creek 1950 Comment
  UC599221  Eriophyllum pringlei Frank W. Peirson 1938-7-9 12450 Mono 1.5 mi se Benton 1950 Comment
  POM203740  Brickellia microphylla F. W. Peirson 1934-7-30 s.n. Mono Summit Sherwin Hill 1951 Comment
  RSA66040  Eriogonum baileyi var. baileyi F. W. Peirson 1933-7-28 10713 Mono Summit of Sherwin Grade 1951 Comment
  RSA69655  Spiranthes porrifolia Frank W. Peirson 1932-7-12 10133 Shasta Along shore of Lake Eiler. Thousand-Lake Basin. 1951 Comment
  RSA70064  Juncus parryi F. W. Peirson 1932-7-12 10121 Shasta In crater of Red Crater Hill; Thousand-Lake Basin. 1951 Comment
  RSA70283  Juncus nevadensis F. W. Peirson 1932-7-14 10119 Shasta Shores of Lake Eiler, Thousand-Lake Basin. 1951 Comment
  RSA84973  Ribes roezlii F. W. Peirson 1919-6-14 690 Los Angeles near top of Big Rock Creek 1951 Comment
  POM87031  Allium campanulatum F. W. Peirson 1925-7-4 6262 El Dorado Road along E shore of Fallen Leaf Lake. 1951 Comment
  POM87076  Heterotheca villosa var. minor F. W. Peirson 1925-7-5 6283 El Dorado Near Fallen Leaf Lodge. 1951 Comment
  RSA0129806  Arabis platysperma F. W. Peirson 1932-7-10 10153 Shasta Thousand-Lake Basin. 1951 Comment
  RSA51464A  Scirpus microcarpus F. W. Peirson 1922-7-30 3228 Ventura South Fork of Seymour Creek Cienega, Mt. Pinos. 1951 Comment
  RSA70448  Allium campanulatum F. W. Peirson 1932-7-12 10129 Shasta Trail below camp; Thousand-Lake Basin. 1951 Comment
  RSA75695  Camissonia heterochroma F. W. Peirson 1934-7-8 11160 Mono Sherwin Hill 1951 Comment
  RSA78643  Asarum hartwegii F. W. Peirson 1932-7-14 13546 Shasta 1000-Lake Basin, Growing near camp on Lake Eiler 1951 Comment
  RSA84314  Isoetes bolanderi F. W. Peirson 1932-7-16 10102 Shasta Small pond just separated from Lake Eiler, Thousand-Lake Basin. 1951 Comment
  RSA87231  Lupinus lyallii var. lyallii F. W. Peirson 1932-7-11 10174 Shasta Forest floor of the interlake region. Thousand-lake Basin, Shasta Co. 1951 Comment
  RSA88796  Carex whitneyi F. W. Peirson 1932-7-13 10113 Shasta Dry places southwest of Red Crater, Thousand-Lake Basin. 1951 Comment
  RSA93261  Heterotheca villosa var. minor F. W. Peirson 1925-7-5 6283 El Dorado Near Fallen Leaf Lodge. 1951 Comment
  RSA93338  Kelloggia galioides F. W. Peirson 1932-7-14 10222 Shasta Thousand-Lake Basin. 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
  CAS-BOT-BC414167  Polygonum aviculare subsp. buxiforme Frank W. Peirson 1927-7-28 7577 Mono Mono Lake aet Mono Inn 1958 Comment
  RSA77798  Lappula occidentalis var. occidentalis F. W. Peirson 1927-7-28 7578 Mono Mono Lake. 1959 Comment
  RSA91238  Vicia villosa F. W. Peirson 1927-7-28 7582 Mono Near Mono Lake. At Mono Inn. 1959 Comment
  SD87741  Ericameria nauseosa var. oreophila Frank W. Peirson 1930-8-12 9205 Mono Mono Lake 1965 Comment
  JEPS20190  Pyrrocoma racemosa var. sessiliflora Frank W. Peirson 1933-7-31 10762 Mono Mono Lake; n shore, back of beach 1965 Comment
  UC511729  Astragalus lentiginosus var. albifolius Frank W. Peirson 1933-7-31 10758 Mono n shore Mono Lake; n shore Mono Lake 1965 Comment
  POM171919  Astragalus casei F. W. Peirson 1930-8-12 9188 Mono North shore of Mono Lake 1966 Comment
  RSA112105  Astragalus lentiginosus var. ineptus F. W. Peirson 1933-7-31 10758 Mono North shore Mono Lake. 1966 Comment
  JEPS36929  Artemisia tridentata subsp. tridentata Frank W. Peirson 1920-9-15 1455 San Bernardino Lytle Creek San Gabriel Mts., Lytle Creek 1981 Comment
  JEPS47798  Asclepias californica Frank W. Peirson 1919-6-15 496 Los Angeles Rock Creek; San Gabriel Mts. 1981 Comment
  UC570577  Horkelia tridentata subsp. tridentata Frank W. Peirson 1935-7-23 11551 Calaveras Big Meadow N. Fork Stanislaus River Region 1981 Comment
  UC908885  Gilia ochroleuca subsp. vivida Frank W. Peirson 1928-6-2 7934 Los Angeles S Fork Rock Cr , S. Fork Rock Cr. (San Gabriel Mts.) 1981 Comment
  CAS-BOT-BC82387  Arnica discoidea Frank W. Peirson 1931-8-6 s.n. El Dorado Trail from Angora Lakes to Fallen-Leaf Lake 1981 Comment
  PASA230  Trifolium cyathiferum Frank W. Peirson 1925-7-2 El Dorado South side Lake Tahoe 1981 Comment
  RSA64721  Eriogonum wrightii var. subscaposum F. W. Peirson 1924-9-1 5151 San Bernardino Johnson's Grade, east end of San Bernardino Mountains 1982 Comment
  RSA69659  Juncus macrophyllus F. W. Peirson 1922-8-27 3271 San Bernardino Barton Flats, San Bernardino Mountains. 1982 Comment
  RSA74939  Phacelia davidsonii F. W. Peirson 1929-7-1 8444 Los Angeles Mt. Pacifico: upper part of trail, San Gabriel Mountains. 1982 Comment
  RSA82534  Stachys albens F. W. Peirson 1924-9-2 5189 San Bernardino San Bernardino Mountains: Near creek about 1 mile below Fish Camp. 1982 Comment
  RSA88681  Carex lemmonii F. W. Peirson 1925-7-2 6225 El Dorado Glen Alpine Ranch, 0.25 miles above Fallen Leaf Lake, Sierra Nevada. 1982 Comment
  RSA88848  Carex subfusca F. W. Peirson 1922-6-25 4268 San Bernardino Near Barton Flats, San Bernardino Mountains. 1982 Comment
  RSA0030025  Delphinium patens subsp. montanum F. W. Peirson 1919-6-14 50 Los Angeles Rock Creek, San Gabriel Mountians. 1982 Comment
  RSA66013  Eriogonum nudum var. pauciflorum F. W. Peirson 1920-9-16 20 San Bernardino North Fork, San Antonio Creek. San Gabriel Mountains 1982 Comment
  RSA73032  Leptosiphon breviculus F. W. Peirson 1929-7-1 8443 Los Angeles Mt. Pacifico: upper part of trail, San Gabriel Mountains. 1982 Comment
  RSA73281  Linanthus pungens F. W. Peirson 1929-7-1 8440 Los Angeles Mt. Pacifico: upper part of trail, San Gabriel Mountains. 1982 Comment
  RSA82033  Cordylanthus rigidus subsp. rigidus F. W. Peirson 1919-8-15 1158 Tulare On trail from Redwood Meadow to Giant Forest. 1982 Comment
  RSA85214  Horkelia tridentata F. W. Peirson 1935-7-23 11551 Calaveras Big Meadow, North Fork of Stanislaus River 1982 Comment
  RSA91721  Gnaphalium thermale F. W. Peirson 1920-9-16 5251 San Bernardino North Fork, San Antonio Creek. San Gabriel Mountains 1982 Comment
  RSA92843  Madia glomerata F. W. Peirson 1931-8-7 9529 El Dorado Glen Alpine Creek Basin 1982 Comment
  RSA92887  Populus fremontii subsp. fremontii F. W. Peirson 1921-7-17 2513 San Bernardino Lytle Creek. 1982 Comment
  RSA95219  Stephanomeria pauciflora F. W. Peirson 1919-8-28 1472 Inyo Saw Mill trail, near Independence. 1982 Comment
  RSA97452  Comandra umbellata subsp. californica F. W. Peirson 1935-7-23 11547 Calaveras Big Meadow, N. Fork of Stanislaus River, Sierra Nevada. 1982 Comment
  PASA924  Crepis acuminata Frank W. Peirson 1921-7-17 Los Angeles Praire Fork of the San Gabriel River 2011 Comment
  RSA72183  Epilobium glaberrimum subsp. glaberrimum F. W. Peirson 1921-7-17 2499 Los Angeles Prairie Fork of San Gabriel River, San Gabriel Mountains. 2012 Comment
  RSA75517  Phacelia fremontii F. W. Peirson 1922-7-7 4477 Los Angeles west end of Swartout Valley 2012 Comment
  RSA79465  Collinsia torreyi F. W. Peirson 1932-7-12 10209 Shasta Along rim of Red Crater. Thousand Lake Basin. Sierra Nevada. 2012 Comment
  RSA64799  Chenopodium salinum F. W. Peirson 1924-7-5 4915 San Bernardino North shore of Baldwin Lake 2037 Comment
  SD87712  Layia glandulosa F. W. Peirson 1924-5-15 4591 San Bernardino Baldwin Lake, San Bernardino Mountains 2040 Comment
  CAS-BOT-BC116988  Carex straminiformis Frank Warrington Peirson 1932-7-12 10110 Shasta Inner slope of the Red Crater, 1000-Lake Basin. South of Burney. 2042 Comment
  CAS-BOT-BC18112  Carex athrostachya Frank W. Peirson 1929-7-11 8467 San Bernardino San Bernardino Mountains. Fawnskin, Bear Valley. 2042 Comment
  CAS-BOT-BC226879  Linanthus killipii F. W. Peirson 1926-5-30 6748 San Bernardino On north side of Baldwin Lake, San Bernardino Mts., southern California 2042 Comment
  CAS-BOT-BC89816  Lepidium montanum Frank W. Peirson 1933-7-29 10724 Mono On the floor of Crooked Creek Canyon. Owens River. 2042 Comment
  RSA90721  Astragalus leucolobus F. W. Peirson 1924-5-15 4566 San Bernardino At foot of hills, Baldwin Lake 2042 Comment
  UC511879  Horkeliella congdonis Frank W. Peirson 1933-7-29 10729 Mono on floor Crooked Creek Canyon; Owens River 2042 Comment
  CAS-BOT-BC196548  Lupinus argenteus var. meionanthus Frank W. Peirson 1933-7-29 10750 Mono Owens River. Near Whisky Creek 2042 Comment
  PASA146  Orthocarpus cinereus Frank W. Peirson 1931-7-1 San Bernardino Southwest shore of Baldwin Lake, San Bernardino Mts. 2042 Comment
  UC511732  Pyrrocoma lanceolata var. lanceolata Frank W. Peirson 1933-7-29 10749 Mono along the river road s Whisky Creek; Owens River 2042 Comment
  UC511875  Oxytheca dendroidea subsp. dendroidea Frank W. Peirson 1933-7-29 10732 Mono slopes about Whisky Creek Whisky Creek 2042 Comment
  UC511877  Cleomella parviflora Frank W. Peirson 1933-7-29 10731 Mono Owens River 2042 Comment
  POM13530  Galium hallii F. W. Peirson 1922-7-6 s.n. Los Angeles 1 mile east of Big Pines in canyon at Saw Mill, Swartout Valley. 2043 Comment
  RSA65939  Polygonum ramosissimum F. W. Peirson 1924-9-1 5161 San Bernardino North side of Baldwin Lake, San Bernardino Mountains. 2043 Comment
  RSA70529  Calochortus invenustus Frank W. Peirson 1930-7-1 8964 San Bernardino Baldwin Lake 2043 Comment
  RSA77248  Hesperochiron californicus F. W. Peirson 1924-5-16 4585 San Bernardino A few feet back from margin of Bear Lake, at east end; San Bernardino Mountains. 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
  RSA85794  Potentilla anserina F. W. Peirson 1924-5-15 4593 San Bernardino Baldwin Lake. 2043 Comment
  RSA86789  Elymus F. W. Peirson 1933-7-29 10735 Mono Low ground in Whiskey Creek near the Owens River. 2043 Comment
  RSA87405  Lupinus confertus F. W. Peirson 1916-7-6 708 San Bernardino Big Bear Lake, San Bernardino Mts. 2043 Comment
  RSA91064  Trifolium longipes subsp. atrorubens F. W. Peirson 1924-5-16 4598 San Bernardino 2.5 miles from Bear Lake Dam on south side of Bear Lake 2043 Comment
  RSA64795  Chenopodium leptophyllum var. leptophyllum F. W. Peirson 1934-7-8 11162 Mono Owens River, about Whisky Creek 2043 Comment
  RSA65264  Chorizanthe brevicornu var. spathulata F. W. Peirson 1933-7-29 10739 Mono Whisky Creek, Owens River. 2043 Comment
  RSA74789  Phacelia ramosissima var. subglabra F. W. Peirson 1933-7-29 10728 Mono Floor of Crooked Creek Canyon; Owens River. 2043 Comment
  RSA77823  Hackelia micrantha F. W. Peirson 1925-7-2 6220 El Dorado Glen Alpine Road, about 0.5 mile above Fallen Leaf Lake. 2043 Comment
  RSA90714  Astragalus lemmonii F. W. Peirson 1933-7-29 10744 Mono Along Hilton Creek, Owens River. 2043 Comment
  RSA91519  Poa secunda F. W. Peirson 1934-7-8 11164 Mono foot of Whiskey Creek, Owens River 2043 Comment
  RSA92125  Carex nebrascensis F. W. Peirson 1934-7-8 11165 Mono At foot of Whisky Creek, Owens River. 2043 Comment
  RSA93640  Antennaria dimorpha F. W. Peirson 1924-5-15 4596 San Bernardino Low places near Baldwin Lake 2043 Comment
  RSA93667  Solidago canadensis subsp. elongata F. W. Peirson 1931-8-8 9537 El Dorado Near trail to Lake of the Woods, Glen Alpine Creek Basin. 2043 Comment
  RSA93912  Iva axillaris F. W. Peirson 1930-7-2 8973 San Bernardino North side of Baldwin Lake. 2043 Comment
  CAS-BOT-BC241262  Castilleja cinerea Frank W. Peirson 1933-6-24 s.n. San Bernardino Southwest shore of Baldwin Lake, San Bernardino Mts. 2057 Comment
  PASA1700  Solidago californica Frank W. Peirson 1924-9-2 San Bernardino Fish Camp, City Creek Road, San Bernardino Mts. 2057 Comment
  RSA90247  Astragalus lentiginosus var. sierrae F. W. Peirson 1942-5-10 s.n. San Bernardino East side of Baldwin Lake, San Bernardino Mts. 2057 Comment
  UC511749  Leymus triticoides Frank W. Peirson 1933-7-13 San Bernardino unused roadways near Baldwin Lake; San Bernardino Mts., Bear Valley 2057 Comment
  RSA85766  Potentilla glandulosa subsp. nevadensis F. W. Peirson 1921-7-17 2678 Los Angeles Prairie Fork of San Gabriel River, San Gabriel Mountains. 2058 Comment
  RSA87208  Lupinus elatus F. W. Peirson 1929-7-1 8439 Los Angeles Mt. Pacifico 2058 Comment
  RSA92438  Poa atropurpurea F. W. Peirson 1932-5-28 9973 San Bernardino southwest shores of Baldwin Lake, San Bernardino Mountains. 2058 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
  RSA85704  Potentilla gracilis F. W. Peirson 1931-8-10 9575 Nevada Along the banks of the Yuba River, 4 miles W of summit of Donner Pass. 2058 Comment
  JEPS51476  Minuartia nuttallii subsp. gracilis Frank W. Peirson 1921-6-17 2437 Los Angeles divide-Bear Cr. and Little Rock tributary San Gabriel Mountains 2072 Comment
  JEPS5839  Calyptridium parryi var. parryi Frank W. Peirson 1922-7-5 3169 Los Angeles Big Pines San Gabriel Mountains 2072 Comment
  JEPS61453  Geranium californicum Frank W. Peirson 1922-7-6 3185 Los Angeles Big Pines San Gabriel Mountains 2072 Comment
  UC1083357  Gilia inyoensis Frank W. Peirson 1925-6-25 6074 Mono Rock Creek Volcanic Tableland 2072 Comment
  UC511745  Lathyrus sulphureus Frank W. Peirson 1933-7-9 10689 Kern s of Summit Camp; Summit Greenhorn Mts. 2072 Comment
  UC511747  Delphinium gracilentum Frank W. Peirson 1933-7-9 10695 Kern in dry meadow about 2 mi s Summit Camp; Greenhorn Mts. 2072 Comment
  NY604258  Penstemon labrosus F. W. Peirson 1929-7-11 8455 Unknown Fawnskin, Bear Valley, San Bernardino Mountains. 2072.6 Comment
Read comments
Jun 26 2012
  POM87034  Eriogonum elatum var. elatum F. W. Peirson 1925-6-25 6055 Mono Rock Creek, volcanic tablelands. 2073 Comment
  RSA65593  Minuartia nuttallii subsp. gracilis F. W. Peirson 1921-6-17 2437 Los Angeles Divide between Little Rock Creek and Bear Creek, north side of San Gabriel Mountains 2073 Comment
  RSA70201  Allium campanulatum F. W. Peirson 1933-7-9 10696 Kern 2 miles south of Summit Camp, Greenhorn Mountains. Alt. 6800 ft. 2073 Comment
  RSA70381  Euphorbia palmeri F. W. Peirson 1922-7-6 3184 Los Angeles Swartout Valley region. Big Pines, north side of San Gabriel Mtns. 2073 Comment
  RSA73284  Linanthus pungens F. W. Peirson 1925-6-25 6073 Mono Rock Creek, Sierra Nevada. 2073 Comment
Read comments
Feb 23 2013
  RSA79832  Penstemon labrosus F. W. Peirson 1929-7-11 8456 San Bernardino Fawnskin, Bear Valley. 2073 Comment
  RSA85732  Potentilla gracilis var. fastigiata F. W. Peirson 1922-7-5 3165 Los Angeles Big Pines Meadow, north side of San Gabriel Mountains 2073 Comment
  RSA90695  Gutierrezia sarothrae F. W. Peirson 1929-8-23 8583 San Bernardino Southwest slopes of Baldwin Lake, San Bernardino Mts. 2073 Comment
  POM162890  Apocynum androsaemifolium subsp. pumilum F. W. Peirson 1929-10-26 8603 San Bernardino Above Fish Camp, City Cr. Road. 2073 Comment
  RSA0041821  Penstemon rydbergii var. oreocharis F. W. Peirson 1925-6-25 6064 Mono Rock Creek. 2073 Comment
  RSA69926  Apocynum androsaemifolium subsp. pumilum F. W. Peirson 1929-10-26 8603 San Bernardino Above Fish Camp, City Cr. Road. 2073 Comment
  RSA70594  Iris missouriensis Frank W. Peirson 1925-6-25 6057 Mono [Lower] Rock Creek, Sierra Nevada 2073 Comment
  RSA79911  Leucophysalis nana F. W. Peirson 1933-7-30 10752 Mono Between Tom's Place and Convict Creek, near the crossing of McGee Creek. 2073 Comment
  RSA90418  Lotus oblongifolius F. W. Peirson 1925-6-25 6062 Mono Rock Creek 2073 Comment
  SD87714  Madia elegans F. W. Peirson 1929-9-11 8588 San Bernardino Bear Valley Boulevard near Peter Pan Woodland Club, San Bernardino Mountains. 2075 Comment
  RSA66507  Arabis parishii F. W. Peirson 1924-5-15 4571 San Bernardino Summit above Doble, San Bernardino Mountains 2100 Comment
  CAS-BOT-BC255449  Eriogonum ampullaceum Frank W. Peirson 1937-8-1 12155 Mono Long Valley, Hot Creek Region 2103 Comment
  JEPS31872  Symphyotrichum frondosum Frank W. Peirson 1937-8-1 12168 Mono Hot Creek Region Long Valley 2103 Comment
  JEPS36841  Stephanomeria exigua subsp. exigua Frank W. Peirson 1937-8-1 12158 Mono Hot Creek Region Long Valley 2103 Comment
  PASA1311  Arenaria macradenia Frank W. Peirson 1930-7-2 San Bernardino Ridge south of summit of Johnson's Grade, San Bernardino Mts. 2103 Comment
  POM259169  Hordeum jubatum F. W. Peirson 1937-8-1 12995 Mono Long Valley 2104 Comment
  RSA74506  Phacelia exilis F. W. Peirson 1932-5-29 9969 San Bernardino Along road to Fish Hatchery, south of Baldwin Lake 2104 Comment
  RSA84848  Ribes cereum var. cereum F. W. Peirson 1922-7-6 4433 Los Angeles Big Pines 2104 Comment
  RSA87056  Hordeum jubatum F. W. Peirson 1937-8-1 12995 Mono Long Valley, Owens River 2104 Comment
  POM231948  Tiquilia nuttallii F. W. Peirson 1937-8-1 12157 Mono Long Valley, Hot Creek Basin 2104 Comment
  RSA90624  Chrysothamnus parryi subsp. asper F. W. Peirson 1929-9-16 8592 San Bernardino Road to Fisheries S of Baldwin Lake, San Bernardino Mts. 2104 Comment
  RSA93740  Aster frondosus F. W. Peirson 1937-8-1 12168 Mono Long Valley, Hot Creek region 2104 Comment
  CAS-BOT-BC268228  Eriogonum umbellatum var. munzii Frank W. Peirson 1920-8-22 2247 San Bernardino Foxesee (Forsee) Creek, San Bernardino Mts. 2133 Comment
  CAS-BOT-BC297169  Erigeron concinnus var. concinnus Frank W. Peirson 1933-6-24 10676 San Bernardino Along ridge southward from the summit of the Johnson Grade, San Bernardino Mts. 2133 Comment
  JEPS15885  Corethrogyne filaginifolia Frank W. Peirson 1929-10-11 8600 San Bernardino 2 mi w Bear Lake Dam (City Cr. Road); San Bernardino Mts. 2133 Comment
  JEPS62047  Lilium parryi Frank W. Peirson 1921-7-17 2515 Los Angeles Prairie Fork, San Gabriel River; San Gabriel Mountains 2133 Comment
  PASA2574  Cotyledon Frank W. Peirson 1930-7-2 8972 San Bernardino Ridge south of summit of Johnson's Grade, San Bernadino Mountains 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
  RSA70459  Allium monticola F. W. Peirson 1921-6-16 5223 Los Angeles north slope of Mt. Waterman 2133 Comment
  RSA90249  Astragalus lentiginosus var. sierrae F. W. Peirson 1920-8-24 2347 San Bernardino Big Meadows, at head of Santa Ana River 2133 Comment
  SD87707  Monardella linoides subsp. sierrae Frank W. Peirson 1927-7-24 7543 Inyo Westgard Pass. 2133 Comment
  UC501602  Arabis dispar Frank W. Peirson 1932-5-7 9918 Inyo North Fork of Hanaupah Canyon Panamint Mts. 2133 Comment
  UC599192  Astragalus lemmonii Frank W. Peirson 1938-7-8 12614 Mono near windmill (Hot Creek Region); Hot Creek Region 2133 Comment
  CAS-BOT-BC355657  Orochaenactis thysanocarpha Frank W. Peirson 1919-8-28 1395 Inyo Saw-Mill [Sawmill] Canyon, east slope Sierras 2133 Comment
  RSA66715  Caulanthus major F. W. Peirson 1929-10-5 8594 San Bernardino Along stream south of Peter Pan Woodland Club, Bear Valley 2134 Comment
  RSA68709  Lilium parryi Frank W. Peirson 1921-7-17 2515 Los Angeles Prairie Fork of San Gabriel River, San Gabriel Mountains. 2134 Comment
  RSA69036  Dodecatheon redolens F. W. Peirson 1921-7-17 2516 Los Angeles Prairie Fork of San Gabriel River, San Gabriel Mountains. 2134 Comment
  RSA69923  Apocynum cannabinum F. W. Peirson 1920-9-14 4469 San Bernardino Coldwater Fork of Lytle Creek, eastern San Gabriel Mountains 2134 Comment
  RSA70294  Juncus duranii F. W. Peirson 1921-7-17 2844 Los Angeles Prairie Fork of San Gabriel River, San Gabriel Mountains. 2134 Comment
  RSA72127  Epilobium ciliatum subsp. glandulosum F. W. Peirson 1920-9-14 2304 San Bernardino Coldwater Cienega, Lytle Creek. 2134 Comment
  RSA84223  Dudleya abramsii subsp. affinis F. W. Peirson 1930-7-2 8972 San Bernardino Ridge south of summit of Johnson Grade, east end of San Bernardino Mountains. 2134 Comment
  RSA84453  Anemone tuberosa F. W. Peirson 1932-5-7 9910 Inyo North fork of Hanaupah Canyon, Panamint Mountains. 2134 Comment
  RSA86769  Deschampsia elongata F. W. Peirson 1924-7-13 4934 San Bernardino big Meadows, upper Santa Ana River, San Bernardino Mountains. 2134 Comment
  RSA66214  Arabis holboellii var. retrofracta F. W. Peirson 1938-7-9 12447 -a Mono Along east base of Mono Craters. 2134 Comment
  RSA66691  Dicentra uniflora F. W. Peirson 1932-7-15 10156 Shasta Along stream from Mt Magee, Thousand-Lake Basin. 2134 Comment
  RSA79819  Keckiella breviflora F. W. Peirson 1919-8-15 1110 Tulare Trail to Giant Forest by 7-mile Hill, Sierra Nevada. 2134 Comment
  RSA84399  Mitella breweri F. W. Peirson 1925-7-3 6244 El Dorado Glen Alpine Creek Basin. Sierra Nevada. 2134 Comment
  RSA90705  Astragalus nuttallianus var. imperfectus F. W. Peirson 1932-5-7 9917 Inyo North fork of Hanaupah Canyon, Panamint Mountains, Alt. 7000 ft. 2134 Comment
  RSA92237  Madia minima F. W. Peirson 1920-6-10 238 Los Angeles summit of Mt. Wilson 2134 Comment
  RSA93083  Solidago confinis F. W. Peirson 1920-8-24 s.n. San Bernardino Big Meadow, San Bernardino Mountains, southern California. [County not listed but most likely San Bernardino Co.] 2134 Comment
  RSA97119  Cornus stolonifera F. W. Peirson 1919-8-22 820 Fresno paradise Valley, South Fork of Kings River, Sierra Nevada. 2134 Comment
  RSA97445  Phoradendron juniperinum subsp. juniperinum F. W. Peirson 1922-6-21 3142 San Bernardino Cienega Seca Creek. 2134 Comment
  JEPS10417  Pedicularis crenulata Frank W. Peirson 1927-7-25 Mono Convict Creek at road crossing Convict Creek 2148 Comment
  CAS-BOT-BC82596  Arnica lanceolata subsp. prima Frank W. Peirson 1934-7-18 11260 Madera at the foot of Rainbow Falls, Middle Fork San Joaquin River 2164 Comment
  UC599224  Tetradymia glabrata Frank W. Peirson 1938-7-9 12448 Mono 19 mi nw Benton 2164 Comment
  RSA86740  Leymus cinereus F. W. Peirson 1932-7-22 10359 Mono Twin Lake Basin ; upper lake 2165 Comment
  RSA0020654  Bromus tectorum F. W. Peirson 1932-7-22 10357 Mono Twin Lakes Basin; lower end of Upper Lake 2165 Comment
  RSA84482  Aconitum columbianum var. columbianum F. W. Peirson 1925-6-28 6146 Mono Rush Creek below Silver Lake. 2165 Comment
  SD87804  Erigeron coulteri Frank W. Peirson 1925-6-28 6143 Mono Reverse Creek, Silver Lake Region 2190 Comment
  CAS-BOT-BC100839  Chrysothamnus viscidiflorus subsp. viscidiflorus Frank W. Peirson 1931-10-10 s.n. San Bernardino Road to Fish Hatchery south of Baldwin Lake, San Bernardino Mts. 2194 Comment
  RSA64724  Eriogonum spergulinum var. reddingianum F. W. Peirson 1925-6-26 6108 Mono Silver Lake. 2195 Comment
  RSA85020  Polypodium hesperium F. W. Peirson 1923-8-22 3984 San Bernardino Vivian Creek, San Bernardino Mountains 2195 Comment
  RSA88764  Carex douglasii F. W. Peirson 1925-6-26 6104 Mono Silver Lake. 2195 Comment
  RSA93388A  Helenium bigelovii F. W. Peirson 1923-8-22 3985 San Bernardino Vivian Creek, San Bernardino Mountains 2195 Comment
  RSA74787  Phacelia ramosissima var. latifolia F. W. Peirson 1930-7-3 8979 San Bernardino 1.25 miles below Fish Hatchery on road from Bear lake, San Bernardino Mts. 2195 Comment
  RSA94922  Cirsium occidentale var. californicum F. W. Peirson 1930-7-3 8983 San Bernardino About 0.5 mile below Fish Hatchery south of Baldwin Lake. 2195 Comment
  RSA97460  Osmorhiza occidentalis F. W. Peirson 1925-6-26 6106 Mono Silver Lake. 2195 Comment
  RSA99370  Lonicera conjugialis F. W. Peirson 1935-7-3 6242 El Dorado Glen Alpine Creek Basin at Grass lake; Sierra Nevada. 2195 Comment
  JEPS54675  Astragalus Frank W. Peirson 1922-7-5 3167 Los Angeles n Big Pines (Le Montaine); San Gabriel Mts, n of Big Pines, Le Montaine 2209 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
  POM13533  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
  RSA69987  Mirabilis pumila F. W. Peirson 1924-7-5 4920 San Bernardino Gold Mountain, near Baldwin Lake 2210 Comment
  RSA86713  Leucopoa kingii F. W. Peirson 1924-7-5 4922 San Bernardino Gold Mt. near Baldwin Lake. 2210 Comment
  RSA92375  Hymenopappus filifolius var. lugens F. W. Peirson 1920-8-25 2773 San Bernardino Summit of ridge W of the S Fork canyon, Santa Ana River, San Bernardino mts 2210 Comment
  JEPS9486  Galium johnstonii F. W. Peirson 1922-7-5 3159 Los Angeles n Big Pines; San Gabriel Mts., Le Montaine 2225 Comment
  UC570575  Luzula cascadensis Frank W. Peirson 1935-7-24 11558 Alpine Margins Lake Alpine 2225 Comment
  RSA87111  Galium johnstonii F. W. Peirson 1922-7-5 3159 Los Angeles Elevation north of Big Pines called La Montaine 2226 Comment
  RSA66727  Galium trifidum var. pusillum F. W. Peirson 1935-7-24 11559 Alpine Margins of Lake Alpine. 2226 Comment
  RSA88700  Carex lenticularis var. lipocarpa F. W. Peirson 1934-7-18 11266 Madera Short way above the Rainbow Falls, middle fork of San Joaquin River. 2226 Comment
  RSA93787  Aster integrifolius F. W. Peirson 1931-8-7 9523 El Dorado Near Grass Lake, Glen Alpine Creek Basin. 2226 Comment
  CAS-BOT-BC246526  Eriogonum elatum var. elatum Frank W. Peirson 1927-7-27 7571 Mono Canyon slope west of camp at north end of Silver Lake 2255 Comment
  RSA65017  Silene menziesii subsp. dorrii F. W. Peirson 1927-7-27 7568 Mono North end of Silver Lake. 2256 Comment
  RSA65179  Eriogonum elatum var. elatum F. W. Peirson 1927-7-27 7571 Mono North end of Silver Lake. 2256 Comment
  RSA72149  Gayophytum decipiens F. W. Peirson 1906-8-14 799 San Bernardino Bluff Lake, San Bernardino Mountains. 2256 Comment
  RSA82199  Trichostema micranthum F. W. Peirson 1924-9-1 5173 San Bernardino Holcomb Valley 2256 Comment
  RSA82202  Trichostema austromontanum subsp. austromontanum F. W. Peirson 1906-8-15 1042 San Bernardino Bluff Lake, San Bernardino Mountains. 2256 Comment
  RSA86746  Elymus glaucus F. W. Peirson 1931-8-8 9534 El Dorado Lake of the Woods Trail; Glen Alpine Creek Basin 2256 Comment
  POM12783  Erigeron breweri var. porphyreticus F. W. Peirson 1922-6-22 3100 San Bernardino Ridge W of S Fork of Santa Ana 2256 Comment
  RSA0050349  Arctostaphylos patula F. W. Peirson 1930-7-7 9023 San Bernardino Arrastre Flat near Holcomb Valley, San Bernardino Mts. 2256 Comment
  RSA84269  Ranunculus aquatilis var. capillaceus F. W. Peirson 1950-7-7 9027 San Bernardino permanent water hole near Caribou Creek, Holcomb Valley 2256 Comment
  RSA90977  Erigeron breweri var. porphyreticus F. W. Peirson 1922-6-22 3100 San Bernardino Ridge W of S Fork of Santa Ana 2256 Comment
  RSA91266  Lupinus latifolius subsp. longipes F. W. Peirson 1934-7-18 11262 Madera Near Reds Meadow, Middle Fork of San Joaquin River, Sierra Nevada. 2256 Comment
  RSA91705  Gnaphalium palustre F. W. Peirson 1930-7-7 9028 San Bernardino Damp place near Caribou Creek, Holcomb Valley, San Bernardino Mts. 2256 Comment
  LA38959  Mimulus guttatus Frank W. Peirson; 1925-7-7 6303 El Dorado Trail along Echo Lake 2285 Comment
  CAS-BOT-BC307410  Gnaphalium palustre Frank W. Peirson 1924-7-5 4912 San Bernardino Bluff Lake, San Bernardino Mts. 2286 Comment
  JEPS1976  Phacelia imbricata subsp. patula Frank W. Peirson 1921-6-16 2451 Los Angeles Mt. Waterman Ridge San Gabriel Mountains 2286 Comment
  SBBG53804  Myosurus apetalus var. montanus F. W. Peirson 1926-5-31 San Bernardino Bluff Lake 2286 Comment
  SD87878  Castilleja plagiotoma Frank W. Peirson 1921-7-3 2727 Los Angeles Blue Ridge, San Gabriel Mts., summit of ridge 2286 Comment
  UC483077  Salix lasiolepis Frank W. Peirson 1919-6-6 717 San Bernardino North Fork San Antonio Creek 2286 Comment
  CAS-BOT-BC310041  Hemizonella minima F. W. Peirson 1925-7-7 6304 El Dorado Trail along Echo Lake 2286 Comment
  JEPS69065  Eriastrum wilcoxii Frank W. Peirson 1933-7-31 10755 Mono n slope Mono Craters 2286 Comment
  POM349507  Trifolium monanthum subsp. grantianum F. W. Peirson 1924-7-5 4070 San Bernardino Bluff Lake. San Bernardino Mts. 2287 Comment
  RSA65687  Lewisia nevadensis F. W. Peirson 1926-5-31 6754 San Bernardino Bluff Lake 2287 Comment
  RSA70084  Platanthera sparsiflora Frank W. Peirson 1919-6-6 504 San Bernardino North Fork of San Antonio Creek, San Gabriel Mountains 2287 Comment
  RSA70525  Calochortus invenustus Frank W. Peirson 1922-6-22 3138 San Bernardino South Fork of Santa Ana River. 2287 Comment
  RSA74503  Phacelia exilis F. W. Peirson 1930-7-7 9017 San Bernardino Arrastre Flat, San Bernardino Mountains 2287 Comment
  RSA0030024  Delphinium patens subsp. montanum F. W. Peirson 1921-7-3 2479 Los Angeles East end of Pinyon Ridge, San Gabriel Mountains 2287 Comment
  RSA66760  Arabis divaricarpa F. W. Peirson 1935-7-24 11573 Alpine North of Lake Alpine, Sierra Nevada. 2287 Comment
  RSA71853  Collomia linearis F. W. Peirson 1914-8-14 4194 Madera Devil's Post Pile 2287 Comment
  RSA73019  Leptosiphon harknessii F. W. Peirson 1925-7-7 6310 El Dorado Meadow on trail to Upper Echo Lake 2287 Comment
  RSA73063  Leptosiphon ciliatus F. W. Peirson 1925-7-7 6312 El Dorado meadow on trail by Upper Echo Lake, Sierra Nevada 2287 Comment
  RSA79801  Penstemon newberryi subsp. newberryi F. W. Peirson 1932-7-24 10400 Tuolumne Slopes above Relief Reservoir, Stanislaus River region, Sierra Nevada. 2287 Comment
  RSA80131  Mimulus guttatus F. W. Peirson 1925-7-7 6303 El Dorado Trail along Echo Lake. 2287 Comment
  RSA80209  Plagiobothrys hispidus F. W. Peirson 1932-7-23 10387 Mono East side of Sonora Pass Sierra Nevada 2287 Comment
  RSA80476  Mimulus lewisii F. W. Peirson 1925-7-6 6299 El Dorado Trail from Fallen Leaf Lake to Lake of the Woods. 2287 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
  RSA91137  Trifolium monanthum subsp. grantianum F. W. Peirson 1906-8-15 4070 San Bernardino Bluff Lake, San Bernardino Mts. 2287 Comment
  RSA91227  Lupinus elatus F. W. Peirson 1906-8-15 546 San Bernardino Bluff Lake, San Bernardino Mountains. 2287 Comment
  RSA91459  Trifolium cyathiferum F. W. Peirson 1932-7-22 10365 Mono Meadows along Robinson Creek, Twin Lake Basin 2287 Comment
  RSA95148  Crepis occidentalis subsp. conjuncta F. W. Peirson 1925-6-29 6158 Mono North slope of grade north of Mono Lake. 2287 Comment
  RSA97158  Lomatium dissectum var. multifidum F. W. Peirson 1935-7-24 11569 Alpine North of Lake Alpine, Sierra Nevada 2287 Comment
  RSA95280  Ceanothus velutinus F. W. Peirson 1925-6-26 6092 Mono Abundant at Convict Lake, E slope of Sierra Nevada. 2312 Comment
  CAS-BOT-BC225447  Gilia leptantha subsp. pinetorum Frank W. Peirson 1923-6-11 3580 Ventura Mt. Pinos 2316 Comment
  PASA2167  Brickellia oblongifolia var. linifolia Frank W. Peirson 1927-7-25 Mono Convict Lake 2316 Comment
  CAS-BOT-BC18111  Carex athrostachya Frank W. Peirson 1934-7-18 11267 Madera Middle Fork San Joaquin River. Pumice Flat. 2316 Comment
  RSA95122  Agoseris retrorsa F. W. Peirson 1922-7-6 1491 Los Angeles Blue Ridge near Swartout Valley. 2316 Comment
  RSA69728  Lemna trisulca F. W. Peirson 1925-6-28 6138 Mono Gull Lake, Reverse Creek 2317 Comment
  RSA71833  Gilia leptantha subsp. leptantha F. W. Peirson 1924-7-13 4942 San Bernardino Along bank of Fish Creek, upper Santa Ana River 2317 Comment
  RSA82270  Castilleja linariifolia F. W. Peirson 1927-7-25 7552 Mono Convict Lake, east slope of Sierra Nevada. 2317 Comment
  RSA72191  Epilobium ciliatum subsp. glandulosum F. W. Peirson 1914-8-15 767 Madera Devils Post Pile, Sierra Nevada 2317 Comment
  RSA91252  Lupinus breweri var. grandiflorus F. W. Peirson 1921-6-16 2441 Los Angeles Summit of Mt. Waterman, San Gabriel Mountains 2317 Comment
  SD87847  Boechera retrofracta F. W. Peirson 1922-6-22 3135 San Bernardino San Bernardino Mountains, South Fork of Santa Ana River 2345 Comment
  JEPS44462  Potentilla wheeleri F. W. Peirson 1922-6-22 3113 San Bernardino South Fork Santa Ana River 2346 Comment
  RSA87114  Galium parishii F. W. Peirson 1931-7-9 9386 San Bernardino Head of Arctic Creek, Holcomb Valley 2348 Comment
  RSA95249  Taraxacum californicum F. W. Peirson 1922-6-22 2261 San Bernardino South Fork of Santa Ana River 2348 Comment
  RSA65015  Silene menziesii subsp. dorrii F. W. Peirson 1920-8-25 2820 San Bernardino Lower end of meadow, South Fork of Santa Ana River 2363 Comment
  RSA95384  Sidalcea malviflora subsp. dolosa F. W. Peirson 1922-6-23 2056 San Bernardino Upper Holcomb Creek 2363 Comment
  RSA79804  Penstemon newberryi subsp. newberryi F. W. Peirson 1925-6-27 6129 Mono Rush Creek. 2363 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
  RSA65667  Montia chamissoi F. W. Peirson 1922-6-22 3137 San Bernardino South Fork of Santa Ana River 2377 Comment
  RSA0078551  Orobanche uniflora subsp. occidentalis F. W. Peirson 1935-7-26 11595 Alpine North slope above North Fork of Mokelumne River at Hermit Valley. 2377 Comment
  POM11884  Myosurus aristatus F. W. Peirson 1922-6-22 3110 San Bernardino South Fork of Santa Ana River. 2378 Comment
  RSA69531  Maianthemum stellatum Frank W. Peirson 1922-7-22 4101 San Bernardino South Fork of Santa Ana River, San Bernardino Mountains 2378 Comment
  RSA70517  Geranium richardsonii F. W. Peirson 1930-7-4 8987 San Bernardino Green Creek, north slope of Sugarloaf, San Bernardino Mts. 2378 Comment
  RSA65922  Rumex crispus F. W. Peirson 1922-7-21 3211 San Bernardino Near stream, Coldwater- San Antonio Canyon Divide, San Gabriel Mts 2378 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
  RSA79866  Penstemon rostriflorus F. W. Peirson 1922-7-19 3206 San Bernardino Divide between Cucamonga and Ontario Peaks, San Gabriel Mtns, 2409 Comment
  RSA88761  Carex douglasii F. W. Peirson 1935-7-28 11719 Alpine Foot of Red Lake. 2409 Comment
  RSA92119  Carex nebrascensis F. W. Peirson 1935-7-28 11717 Alpine Lake margin at embankment at foot of Red Lake. 2409 Comment
  RSA94851  Arnica longifolia subsp. myriadenia F. W. Peirson 1919-8-13 1422 Fresno Camp near Mineral King, Sierra Nevada 2409 Comment
  PASA1305  Silene platyota Frank W. Peirson 1930-7-4 San Bernardino Greene Creek, north slope sugarloaf, San Bernardino Mts. 2438 Comment
  PASA2376  Acer glabrum Frank W. Peirson 1930-7-4 San Bernardino Greene Creek, north slope Sugarloaf, San Bernardino Mts. 2438 Comment
  PASA340  Scorzonella nutans Frank W. Peirson 1927-8-6 Mariposa Porcupine Flat 2438 Comment
  RSA84285  Equisetum arvense F. W. Peirson 1922-6-22 3111 San Bernardino South Fork of Santa Ana River, San Bernardino Mountains 2438 Comment
  RSA94689  Senecio bernardinus F. W. Peirson 1922-6-23 3145 San Bernardino Sugarloaf Mountain 2438 Comment
  UC501425  Monardella odoratissima subsp. glauca Frank W. Peirson 1932-7-22 10361 Mono Twin Lake Basin, from Bridgeport, along Robinson Creek on the steep slope below Barney Lake. 2438 Comment
  CAS-BOT-BC127793  Brickellia grandiflora Mabel B. Peirson 1931-8-5 s.n. El Dorado Echo Lake Region. Slopes above Tamarac Lake 2438 Comment
  CAS-BOT-BC332950  Senecio spartioides Frank W. Peirson 1930-8-11 9179 Mono North of Deadman Creek 2438 Comment
  PASA1970  Lappula floribunda Frank W. Peirson 1932-6-22 Mono Twin Lake Basin 2438 Comment
  PASA785  Gilia gilioides Frank W. Peirson 1932-7-22 Mono Twin Lake Basin, Steep rocky slope along the Robinson creek 2438 Comment
  RSA65038  Silene parishii F. W. Peirson 1906-8-17 609 San Bernardino South Fork of Santa Ana River. 2439 Comment
  RSA66521  Arabis holboellii var. pinetorum F. W. Peirson 1930-7-8 s.n. San Bernardino Fish Hatchery creek [possibly Green Canyon Creek], N side of Sugarloaf, San Bernardino Mts 2439 Comment
Read comments
Aug 15 2011
  RSA69030  Dodecatheon alpinum F. W. Peirson 1908-7-19 860 Tulare Junction Meadow. Sierra Nevada, Tulare County 2439 Comment
  RSA72132  Epilobium angustifolium subsp. circumvagum F. W. Peirson 1908-7-19 768 Tulare Junction Meadow, Kern River Canyon, Sierra Nevada. 2439 Comment
  RSA76992  Acer glabrum subsp. diffusum F. W. Peirson 1930-7-4 8990 San Bernardino Greene Creek, north slope of Sugarloaf Peak 2439 Comment
  RSA85619  Ivesia santolinoides F. W. Peirson 1927-8-6 7657 Mariposa Porcupine Flat 2439 Comment
  RSA86623  Purshia tridentata var. tridentata F. W. Peirson 1930-8-11 9178 Mono Volcanic mountains north of Deadman Creek. 2439 Comment
  RSA64705  Eriogonum spergulinum var. reddingianum F. W. Peirson 1923-6-11 5346 Ventura Mt. Pinos. 2439 Comment
  RSA66316  Monolepis nuttalliana F. W. Peirson 1925-6-29 6149 Mono Summit of grade north of Mono Lake 2439 Comment
  RSA80346  Cymopterus panamintensis var. panamintensis F. W. Peirson 1932-5-8 9931 Inyo Wild Rose Canyon, Panamint Mountains. 2439 Comment
  RSA85544  Cheilanthes gracillima F. W. Peirson 1925-6-27 6127 Mono Rush Creek, Sierra Nevada 2439 Comment
  RSA93177  Machaeranthera canescens F. W. Peirson 1922-7-30 3226 Ventura Mt. Pinos 2439 Comment
  RSA93646  Solidago multiradiata F. W. Peirson 1908-7-19 1233 a Tulare Junction Meadows, Sierra Nevada. 2439 Comment
  RSA94503  Arnica cordifolia F. W. Peirson 1935-7-26 11593 Alpine Hermit Valley, North Fork Mokelumne River, Sierra Nevada. 2439 Comment
  CAS-BOT-BC21937  Carex heteroneura F. W. Peirson 1937-7-30 13609 Mono Lundy. 2468 Comment
  RSA70300  Juncus mertensianus F. W. Peirson 1937-7-31 12200 Mono Mill Creek (Lundy Canyon). 2470 Comment
  RSA74854  Phacelia heterophylla subsp. virgata F. W. Peirson 1937-7-30 12137 Mono Mill Creek (Lundy Canyon) 2470 Comment
  RSA91850  Danthonia californica var. americana F. W. Peirson 1930-8-16 9235 Mariposa in canyon below Lake Tenaya 2470 Comment
  CAS-BOT-BC99302  Symphyotrichum spathulatum F. W. Peirson 1927-8-5 7646 Mariposa Murphy Creek, Lake Tenaya Region 2484 Comment
  RSA65047  Silene lemmonii F. W. Peirson 1927-8-5 7639 Mariposa South side of May Lake, Sierra Nevada 2485 Comment
  RSA93317  Aster breweri F. W. Peirson 1927-8-5 7640 Mariposa South side of May Lake, Sierra Nevada 2485 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
  PASA1835  Ligusticum grayi Frank W. Peirson 1930-8-15 Mariposa Lake Tenaya Region 2499 Comment
  RSA68724  Fritillaria pinetorum Frank W. Peirson 1922-7-6 5337 Los Angeles Westward from highest point of Blue Ridge, San Gabriel Mountains 2500 Comment
  RSA80473  Mimulus laciniatus F. W. Peirson 1935-7-19 11534 Mariposa Glaciated region west of Lake Tenaya 2500 Comment
  RSA86935  Betula occidentalis F. W. Peirson 1911-8-1 1705 Fresno Woods Creek Meadow, Sierra Nevada. 2500 Comment
  RSA87371  Agrostis idahoensis F. W. Peirson 1918-7-7 1576 San Bernardino Kellly's Cabin, Ontario Ridge, San Gabriel Mountains. 2500 Comment
  RSA69642  Listera convallarioides Frank W. Peirson 1911-8-1 1699 Fresno Woods Creek at meadow, Sierra Nevada 2500 Comment
  RSA87414  Lupinus latifolius subsp. longipes F. W. Peirson 1930-8-15 9227 Mariposa Murphy Creek, Lake Tenaya region, Yosemite National Park. 2500 Comment
  RSA91744  Muhlenbergia montana F. W. Peirson 1935-7-19 11535 Mariposa Glaciated region north of Lake Tenaya, Sierra Nevada. 2500 Comment
  RSA93290  Corethrogyne filaginifolia F. W. Peirson 1922-8-25 3268 San Bernardino Along base of E slope, S Fork of Santa Ana River, San Bernardino Mts 2500 Comment
  POM87165  Caltha howellii F. W. Peirson 1925-7-3 s.n. El Dorado Glen Alpine Creek Basin. 2515 Comment
  RSA70566  Vaccinium uliginosum subsp. occidentale F. W. Peirson 1917-08 837 Fresno Grouse Meadows, Sierra Nevada. 2515 Comment
  RSA79825  Penstemon azureus var. azureus F. W. Peirson 1921-8-9 1109 Fresno Aspen Meadow, San Joaquin River. 2515 Comment
  RSA0011683  Drosera rotundifolia F. W. Peirson 1917-8-12 1936 Fresno Grouse Meadows, Middle Fork of Kings River. 2515 Comment
  RSA86272  Aspidotis densa F. W. Peirson 1921-8-9 1511 Sierra South Fork of San Joaquin River 2515 Comment
  RSA90975  Erigeron breweri F. W. Peirson 1921-8-9 2521 Fresno Aspen Meadow. S Fork of the San Joaquin River. Sierra Nevada. 2515 Comment
  RSA95215  Stephanomeria exigua subsp. exigua F. W. Peirson 1923-8-31 4014 Los Angeles Blue Ridge, near Swartout Valley 2529 Comment
  RSA70527  Calochortus invenustus Frank W. Peirson 1918-7-7 2851 San Bernardino Ontario Ridge, eastern San Gabriel Mountains. 2530 Comment
  RSA72152  Gayophytum humile F. W. Peirson 1925-7-5 6268 El Dorado Mt. Tallac, middle trail near stream. Sierra Nevada. 2530 Comment
  RSA79423  Collinsia torreyi var. wrightii F. W. Peirson 1925-7-7 6315 El Dorado Echo Lakes Divide. 2530 Comment
  RSA95137  Crepis intermedia F. W. Peirson 1935-7-25 11582 Alpine Below summit of main ridge, north of Lake Alpine, Sierra Nevada 2530 Comment
  UC640211  Lupinus lepidus var. lobbii Frank W. Peirson 1939-8-9 12789 Alpine in meadow land n Woods Lake; n of Woods Lake 2545 Comment
  RSA85933  Selaginella asprella Frank W. Peirson 1922-7-18 3201 San Bernardino Summit of Ontario Ridge, above Kelly s Cabin 2546 Comment
  RSA84998  Athyrium filix-femina F. W. Peirson 1922-8-25 3285 San Bernardino South fork of Santa Ana River, San Bernardino Mountains 2560 Comment
  CAS-BOT-BC118618  Carex raynoldsii Frank Warrington Peirson 1937-7-22 12202 Alpine Woods Lake 2560 Comment
  RSA90979  Erigeron breweri var. covillei F. W. Peirson 1922-8-22 3291 San Bernardino Meadows of South Fork of Santa Ana River, San Bernardino Mountains. 2560 Comment
  UC640244  Sparganium emersum var. emersum Frank W. Peirson 1939-8-10 12813 Alpine margin of Woods Lake 2560 Comment
  RSA86767  Deschampsia elongata F. W. Peirson 1937-6-27 12220 Alpine Woods Lake, Sierra Nevada 2561 Comment
  RSA65876  Polygonum kelloggii F. W. Peirson 1922-7-30 3222 Ventura Mt. Pinos. 2561 Comment
  RSA68644  Calochortus leichtlinii Frank W. Peirson 1935-7-25 11588 Alpine Open summit of ridge ca. 2 miles N of Lake Alpine 2561 Comment
  RSA72158  Gayophytum racemosum F. W. Peirson 1922-7-30 3240 Ventura Mt. Pinos. 2561 Comment
  RSA91586  Luzula comosa F. W. Peirson 1935-7-29 11721 a Alpine Near Woods Lake. 2561 Comment
  RSA97259  Sphenosciadium capitellatum F. W. Peirson 1939-8-14 12860 Alpine near Woods Lake, Sierra Nevada 2561 Comment
  CAS-BOT-BC242811  Eriogonum davidsonii Frank W. Peirson 1923-8-31 4005 San Bernardino About 4 miles eastward from Big Pines Camp, Blue Ridge, San Gabriel Mts. 2590 Comment
  CAS-BOT-BC312587  Hulsea vestita subsp. callicarpha Frank W. Peirson 1924-7-27 5005 Riverside Near Deer Spring, San Jacinto Mts. 2590 Comment
  CAS-BOT-BC375003  Stenotus acaulis Frank W. Peirson 1925-7-5 6273 El Dorado Mt. Talac [Tallac] 2590 Comment
  JEPS49761  Cycladenia humilis var. venusta Frank W. Peirson 1918-7-8 147 San Bernardino Baldy, Mt. San Antonio 2590 Comment
  PASA952  Senecio multicapitatus Frank W. Peirson 1920-8-22 San Bernardino Foxsee Creek (Santa Ana River tributary) San Bernardino Mts. 2590 Comment
  RSA65851  Eriogonum microtheca var. johnstonii F. W. Peirson 1922-7-19 3199 San Bernardino Cucamonga Peak, San Gabriel Mountains 2591 Comment
  RSA66151  Arabis divaricarpa F. W. Peirson 1920-8-22 2244 San Bernardino Foxesee Creek, San Bernardino Mts. 2591 Comment
  RSA66763  Arabis divaricarpa F. W. Peirson 1932-7-23 10380 Mono East side of Sonora Pass. 2591 Comment
  RSA67164  Galium trifidum var. pusillum F. W. Peirson 1930-8-14 9215 Tuolumne Tuolumne Meadows. Sierra Nevada. 2591 Comment
  RSA79467  Collinsia torreyi var. wrightii F. W. Peirson 1927-6-15 7346 San Bernardino West side of the Coldwater; Devil's Backbone, San Gabriel Mountains. 2591 Comment
  RSA86352  Tsuga mertensiana F. W. Peirson 1930-8-15 9224 Mariposa Between Tuolumne Meadow and Lake Tenaya, just about at the Tuolumne-Mariposa county line. 2591 Comment
  RSA87409  Lupinus lyallii var. villosus F. W. Peirson 1932-7-23 10377 Mono East slope of Sonora Pass. 2591 Comment
  RSA65058  Silene verecunda subsp. platyota F. W. Peirson 1922-7-5 4687 Los Angeles Blue Ridge, north side of San Gabriel Mountains 2591 Comment
  RSA79847  Penstemon labrosus F. W. Peirson 1923-8-31 4031 Los Angeles Just below summit of Blue Ridge, 3-4 miles east of Big Pines, San Gabriel Mtns. 2591 Comment
  RSA85541  Cheilanthes gracillima F. W. Peirson 1937-7-21 12153 Mono Mill Creek, Lundy Canyon 2591 Comment
  RSA93626  Antennaria rosea F. W. Peirson 1906-8-17 1312 San Bernardino South Fork of Santa Ana River. 2591 Comment
  RSA93665  Solidago canadensis subsp. elongata F. W. Peirson 1916-8-22 1231 Tulare Big Arroyo, Sierra Nevada. 2591 Comment
  RSA99351  Symphoricarpos rotundifolius var. parishii F. W. Peirson 1920-8-22 2264 San Bernardino Foxesee Creek [Forsee Creek], San Bernardino Mts. 2591 Comment
  RSA70457  Allium burlewii F. W. Peirson 1918-7-7 266 San Bernardino Summit of Ontario Peak, San Gabriel Mts. 2621 Comment
  UC640221  Mimulus tilingii Frank W. Peirson 1939-8-14 12865 Alpine East Fork Woods Lake Region (near stream) 2621 Comment
  UC640224  Navarretia capillaris Frank W. Peirson 1939-8-14 12863 Alpine East Fork , East Fork (Woods Lake Region) 2621 Comment
  RSA69534  Maianthemum stellatum Frank W. Peirson 1935-8-4 11651 Mono Sonora Pass region 2622 Comment
  RSA88781  Carex scopulorum var. bracteosa F. W. Peirson 1935-8-4 11727 Mono Mono County: About 2 miles southeast of Sonora Pass 2622 Comment
  RSA0029561  Geranium richardsonii F. W. Peirson 1932-7-23 10386 Mono East side of Sonora Pass, Sierra Nevada. 2622 Comment
  RSA65873  Polygonum kelloggii F. W. Peirson 1939-8-12 12844 Alpine Woods Lake region; southward from Carson Pass. 2622 Comment
  RSA69407  Delphinium nuttallianum F. W. Peirson 1937-7-26 12126 Alpine Creek E of Woods Lake. 2622 Comment
  RSA74831  Phacelia hydrophylloides F. W. Peirson 1939-8-12 12843 Alpine Carson Pass, Sierra Nevada. 2622 Comment
  RSA77494  Angelica breweri F. W. Peirson 1911-8-9 9544 El Dorado Found where East trail and Middle trail join, Mt. Tallac 2622 Comment
  RSA91856  Cinna latifolia F. W. Peirson 1939-8-14 12866 Alpine Along the East Fork, near Woods Lake. 2622 Comment
  RSA93019  Bahia dissecta F. W. Peirson 1922-8-23 3282 San Bernardino S Fork of Santa Ana River, San Bernardino Mts 2622 Comment
Read comments
Jul 19 2009
  RSA65284  Eriogonum wrightii var. subscaposum F. W. Peirson 1922-7-30 5347 Ventura Mt. Pinos. 2652 Comment
  RSA65928  Eriogonum kennedyi var. alpigenum F. W. Peirson 1922-7-30 3231 Ventura Mt. Pinos. 2652 Comment
  RSA82573  Stachys stebbinsii F. W. Peirson 1924-7-27 4994 Riverside Deer Springs, San Jacinto Mtns. 2668 Comment
  RSA84859  Ranunculus oxynotus F. W. Peirson 1920-8-22 1877 San Bernardino Foxesse Creek [Forsee Creek], San Bernardino Mts. 2668 Comment
  CAS-BOT-BC31567  Carex luzulifolia Frank W. Peirson 1937-7-25 13564 Alpine Trail to Winnemucca, Woods Lake. 2682 Comment
  RSA88664  Carex luzulifolia F. W. Peirson 1935-7-30 11723 Alpine small riparian meadows along stream west of Woods Lake 2683 Comment
  UC640214  Eriogonum spergulinum var. reddingianum Frank W. Peirson 1939-8-13 12854 Alpine slopes about Frog Lake Woods Lake Region, Frog Lake 2712 Comment
  RSA93834  Chrysothamnus parryi subsp. nevadensis F. W. Peirson 1939-8-12 12847 Alpine About Frog Lake, Woods Lake Region, Sierra Nevada 2713 Comment
  CAS-BOT-BC21935  Carex heteroneura Frank W. Peirson 1935-8-4 11732 Mono Sonora Pass Region. About 2 miles southeast of Pass. 2743 Comment
  JEPS10748  Pedicularis semibarbata Frank W. Peirson 1918-6-17 212 Los Angeles n slope North Baldy Baldy; San Gabriel Mountains 2743 Comment
  JEPS44520  Horkelia rydbergii Frank W. Peirson 1923-8-23 3976 San Bernardino 1/4 mi w High Creek; San Gabriel Mountains 2743 Comment
Read comments
Jul 28 2016
  UC640241  Polygonum davisiae Frank W. Peirson 1939-8-10 12800 Alpine near Winnemucca Lake; Woods Lake Region 2743 Comment
  RSA95157  Hieracium horridum F. W. Peirson 1920-8-22 2343 San Bernardino Foxesee Creek [Forsee Creek], San Bernardino Mountains 2743 Comment
  RSA69618  Triglochin palustris F. W. Peirson 1919-8-12 1541 Tulare Rattlesnake Creek, tributary of Kern River 2744 Comment
Read comments
Mar 1 2011
  RSA69635  Juncus balticus subsp. ater F. W. Peirson 1920-8-25 2268 San Bernardino Dollar Lake, San Bernardino Mountains. 2744 Comment
  RSA87333  Melica bulbosa F. W. Peirson 1937-7-24 12218 Alpine Shores of Winnemucca Lake, Woods Lake Region, Sierra Nevada. 2744 Comment
  RSA0126135  Arabis drummondii F. W. Peirson 1939-8-10 12802 Alpine Winnemucca Lake, Woods Lake Region 2744 Comment
  RSA100243  Valeriana capitata subsp. californica F. W. Peirson 1939-8-10 12797 Alpine Above Winnemucca Lake, Woods Lake Region, Sierra Nevada 2744 Comment
  RSA69273  Chimaphila umbellata subsp. occidentalis F. W. Peirson 1924-7-14 4964 San Bernardino Slope E of S Fork Santa Ana. 2744 Comment
  RSA73060  Leptosiphon ciliatus F. W. Peirson 1927-7-31 7605 Tuolumne On trail from Tuolumne Meadows to Conness Peak. Sierra Nevada. 2744 Comment
  RSA85749  Potentilla flabellifolia F. W. Peirson 1935-7-27 11609 Alpine Along small streamlet on west slope of Ebbetts Pass. 2744 Comment
  RSA88696  Carex lenticularis var. lipocarpa F. W. Peirson 1939-8-10 12810 Alpine Winnemucca Lake, Woods Lake Region 2744 Comment
  RSA97458  Osmorhiza occidentalis F. W. Peirson 1939-8-13 12852 Alpine Slope above Frog Lake, Woods Lake Region, Sierra Nevada 2744 Comment
  RSA69502  Luzula comosa F. W. Peirson 1923-8-23 4263 San Bernardino High Creek, San Bernardino Mountains. 2774 Comment
  RSA70266  Juncus macrandrus F. W. Peirson 1923-8-23 3969 San Bernardino High Creek, San Bernardino Mountains. 2774 Comment
  RSA80151  Mimulus breweri F. W. Peirson 1922-8-23 3278 San Bernardino Dry Lake, San Bernardino Mountains. 2774 Comment
  RSA85686  Potentilla fruticosa F. W. Peirson 1925-6-27 6114 Mono Gem Lake. 2774 Comment
  RSA86296  Potentilla wheeleri F. W. Peirson 1906-8-18 4279 San Bernardino Dry Lake. 2774 Comment
  CAS-BOT-BC119113  Carex phaeocephala Frank Warrington Peirson 1935-8-4 11730 Mono Sonora Pass Region. Open terrain along the main range ca 1.5 mi S of Pass. 2804 Comment
  GH404012  Cryptantha humilis F. W. Peirson 1935-7-27 11599 Unknown Summit region south of Ebbets Pass 2804 Comment
  RSA80065  Veronica cusickii F. W. Peirson 1937-7-23 12100 Alpine Along western edge of plateau southwest of Woods Lake 2805 Comment
  RSA80470  Mimulus nanus var. mephiticus F. W. Peirson 1935-7-30 11635 Alpine West of Roundtop, Woods Lake Region. 2805 Comment
  RSA464467  Lewisia pygmaea F. W. Peirson 1935-7-30 s.n. Alpine Alpine County: Woods Lake Region. High open plain NW from Roundtop 2805 Comment
  RSA86301  Ivesia lycopodioides subsp. megalopetala F. W. Peirson 1921-8-10 2532 Fresno Evolution Meadow, Sierra Nevada. 2805 Comment
  UC511738  Dodecatheon alpinum Frank W. Peirson 1927-8-6 7652 Mariposa May Lake 2819 Comment
  RSA70455  Allium burlewii F. W. Peirson 1918-6-17 4 Los Angeles Summit of North Baldy, San Gabriel Mts. 2820 Comment
  RSA70830  Arctostaphylos nevadensis F. W. Peirson 1925-6-27 6117 Mono West end of Gem lake, Sierra Nevada. 2820 Comment
  A364338  Eriogonum microthecum var. alpinum F. W. Peirson 1935-8-4 11647 Unknown Sonora Pass region 2834 Comment
  RSA84210  Sedum niveum F. W. Peirson 1922-8-24 3293 San Bernardino Rocky ledge above Dollar Lake, San Bernardino Mountains. 2834 Comment
  RSA66102  Cardamine breweri F. W. Peirson 1935-8-4 11662 Mono East slope of main range, ca. 1.5 miles S of Sonora Pass. 2835 Comment
  RSA80451  Mimulus moschatus var. longiflorus F. W. Peirson 1927-8-6 7651 Mariposa Near May Lake, Sierra Nevada. 2835 Comment
  RSA83951  Saxifraga oregana F. W. Peirson 1935-8-4 11655 Mono Along east slope of main range, ca. 1.5 miles east of Sonora Pass, Sierra Nevada. 2835 Comment
  RSA93942  Artemisia arbuscula subsp. arbuscula F. W. Peirson 1937-7-26 12128 Alpine East of Winnemucca Lake, Woods lake region 2835 Comment
  RSA94892  Arnica fulgens F. W. Peirson 1935-7-30 11636 Alpine N slope of Roundtop, Woods Lake Region. 2865 Comment
  RSA84857  Ranunculus oxynotus F. W. Peirson 1935-7-30 11638 Alpine N slope of Roundtop, Woods Lake Region. 2866 Comment
  RSA93179  Machaeranthera canescens F. W. Peirson 1920-8-22 2588 San Bernardino Ridge east of Foxesee Creek [Forsee Creek], San Bernardino Mts 2895 Comment
  CAS-BOT-BC22080  Carex heteroneura Frank W. Peirson 1937-7-25 12205 Alpine Woods Lake Region. Near Fourth of July Lake. 2895 Comment
  POM9929  Cryptogramma acrostichoides F. W. Peirson 1921-8-22 1519 San Bernardino San Bernardino Mountains: Foxesee Creek [Forsee Creek]. 2895 Comment
  SD87600  Scorzonella nutans var. laciniata Frank W. Peirson 1921-8-9 1465 Fresno Piute Creek 2895 Comment
  RSA84523  Jamesia americana var. rosea F. W. Peirson 1913-8-10 1952 Fresno Above Vidette Meadow, Bubba Creek 2896 Comment
  RSA85745  Potentilla flabellifolia F. W. Peirson 1925-6-27 6123 Mono Rush Creek. 2896 Comment
  RSA87330  Muhlenbergia filiformis F. W. Peirson 1921-8-16 2565 Fresno South Fork of Kings River, Sierra Nevada. 2896 Comment
  RSA88837  Carex phaeocephala F. W. Peirson 1920-9-15 2290 San Bernardino Summit of peak north of Mount San Antonio 2896 Comment
  POM231942  Silene douglasii F. W. Peirson 1937-7-22 s.n. Alpine Woods Lake Region; near Fourth of July Lake. 2896 Comment
  RSA69742  Luzula parviflora F. W. Peirson 1927-7-31 7608 Tuolumne Trail from Tuolumne Meadows to Conness Peak. 2896 Comment
  RSA90361  Lotus davidsonii F. W. Peirson 1920-8-22 4094 San Bernardino Ridge east of Foxesee Creek [Forsee Creek], San Bernardino Mountains 2896 Comment
  RSA95072  Microseris nutans F. W. Peirson 1921-8-9 1465 Fresno Oiute [Piute?] Creek, Sierra Nevada 2896 Comment
  PASA951  Senecio multicapitatus Frank W. Peirson 1922-8-23 San Bernardino North slope San Gorgonio, San Bernardino Mts. 2925 Comment
  RSA0070605  Cirsium canovirens F. W. Peirson 1935-7-29 11628 Alpine Summit of Elephants Back, Woods Lake Region, Sierra Nevada. 2927 Comment
  UC501528  Anemone drummondii Frank W. Peirson 1932-7-23 10393 Mono summit Sonora Pass; w. edge Mono Co., Sonora Pass 2933 Comment
  CAS-BOT-BC124060  Galium hypotrichium subsp. subalpinum Frank Warrington Peirson 1919-8-27 1189 Inyo Sawmill Creek, east slope Sierra Nevada 2956 Comment
  JEPS19208  Lorandersonia peirsonii F. W. Peirson 1919-8-27 1404 Inyo Sawmill Canyon e. slope Sierra Nevada 2956 Comment
  RSA0005760  Galium munzii var. subalpinum F. W. Peirson 1919-7-27 1189 Inyo Sawmill Creek, east slope of Sierra Nevada. 2957 Comment
  RSA85758  Potentilla glandulosa var. nevadensis F. W. Peirson 1921-8-10 1973 Fresno Evolution Creek, Sierra Nevada Creek. 2957 Comment
  RSA90614  Pyrrocoma apargioides F. W. Peirson 1921-8-10 2713 Fresno Evolution Creek, Sierra Nevada 2957 Comment
  RSA80089  Mimulus tilingii F. W. Peirson 1929-7-21 8515 Inyo Showy and in considerable clumps, stream bank in allucvial flat South Lake, Bishop Creek. 2973 Comment
  RSA93851  Chrysothamnus parryi subsp. monocephalus F. W. Peirson 1934-7-13 11208 Mono Shores of Virginia Lake, Virginia Lakes Basin 2988 Comment
  RSA94873  Arnica nevadensis F. W. Peirson 1934-7-16 11394 Mono Moraine near Virginia Lakes Resort, Virginia Lakes Basin, Sierra Nevada 2988 Comment
  RSA65669  Montia chamissoi F. W. Peirson 1927-7-29 7589 Mono Slate Creek near Saddlebag Lake, Sierra Nevada. 3017 Comment
  RSA72129  Epilobium saximontanum F. W. Peirson 1929-7-19 8485 Inyo Bishop Creek at South Lake. 3018 Comment
  RSA86626  Purshia tridentata var. tridentata F. W. Peirson 1934-7-11 11183 Mono East of Blue Lake, Virginia Lakes Basin, Sierra Nevada. 3018 Comment
  UCR136628  Thalictrum fendleri F. W. Peirson 1934-7-16 11242 Mono Sierra Nevada Mtns., brushy west end of Blue Lake, Virginia Lakes Basin 3018 Comment
  POM203907  Wyethia mollis F. W. Peirson 1934-7-16 s.n. Mono Open spaces at west end of Blue Lake, Virginia Lakes Basin, east slope of Sierra Nevada 3018 Comment
  POM47060  Arenaria serpyllifolia subsp. serpyllifolia F. W. Peirson 1924-5-27 4622 Los Angeles Colby s Ranch. San Gabriel Mountains. 3018 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
  RSA68799  Delphinium glaucum F. W. Peirson 1934-7-16 11237 Mono W end of Blue L Lake, Virginia Lakes Basin 3018 Comment
  RSA79426  Collinsia parviflora F. W. Peirson 1935-7-18 11664 Mono Near site of old saw mill; Slate Creek. 3018 Comment
  RSA91135  Trifolium monanthum subsp. monanthum F. W. Peirson 1927-7-29 7590 Mono Slate Creek, east slope of Sierra Nevada. 3018 Comment
  RSA92708  Salix orestera F. W. Peirson 1929-7-19 8491 Inyo Upper Bishop Creek at South Lake, east slope of Sierra Nevada. 3018 Comment
  RSA93264  Erigeron lonchophyllus F. W. Peirson 1929-7-25 8561 Inyo South Lake, Bishop Creek Region, east slope of Sierra Nevada 3018 Comment
  RSA70078  Platanthera leucostachys Frank W. Peirson 1934-7-16 11234 Mono Just above the gorge above Blue Lake, Virginia Lakes Basin. 3034 Comment
  RSA94854  Arnica longifolia subsp. myriadenia F. W. Peirson 1934-7-16 11240 Mono Above Blue Lake. Virginia Lakes Basin. 3034 Comment
  PASA2189  Chaenactis douglasii Frank W. Peirson 1921-8-6 Inyo Trail north from Big Pine Creek 3047 Comment
  UC221334  Lorandersonia peirsonii Frank W. Peirson 1921-8-7 2517 Inyo North Fork Bishop Creek 3048 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
  RSA80211  Plagiobothrys greenei F. W. Peirson 1911-8-9 1028 Tulare Whitney Meadows, Sierra Nevada 3049 Comment
  RSA87374  Agrostis scabra F. W. Peirson 1930-8-6 9110 Inyo Rock Creek Lake Basin, northern Inyo County. 3049 Comment
  RSA72634  Wyethia mollis F. W. Peirson 1934-7-14 11209 Mono Above the Virginia Lakes, east slope of Sierra Nevada. 3049 Comment
  RSA90252  Astragalus lentiginosus var. ineptus F. W. Peirson 1914-8-4 587 Inyo Coyote Creek. 3049 Comment
  RSA91258  Lupinus breweri var. bryoides F. W. Peirson 1921-8-6 2549 Inyo Coyote Creek meadows, Sierra Nevada 3049 Comment
  RSA0117257  Collinsia parviflora F. W. Peirson 1930-8-6 9109 Inyo Rock Creek Lake Basin, northern Inyo County. 3079 Comment
  RSA87421  Lupinus polyphyllus subsp. superbus F. W. Peirson 1927-8-3 7633 Tuolumne West side of Mt. Dana. 3110 Comment
  RSA0003480  Lupinus padre-crowleyi F. W. Peirson 1921-8-6 2551 Inyo Trail out of Big Pine to Baker Creek, Sierra Nevada 3125 Comment
  SD87801  Antennaria corymbosa Frank W. Peirson 1940-8-6 12958 Inyo Rock Creek Lake Basin. 3130 Comment
  RSA0084027  Potentilla F. W. Peirson 1921-8-8 2629 Fresno Piute Creek, Sierra Nevada. 3139 Comment
  RSA65948  Eriogonum umbellatum var. nevadense F. W. Peirson 1934-7-10 11171 Mono rocky location near Cooney Lake, Virginia Lakes Basin, Sierra Nevada. 3140 Comment
  SD87802  Erigeron compositus Frank W. Peirson 1934-7-10 11176 Mono Virginia Lakes Basin, Rock Platform near Cooney Lake 3140 Comment
  POM203398  Arabis puberula F. W. Peirson 1934-7-10 11175 Mono Near Cooney Lake, Virginia Lakes Basin. 3140 Comment
  POM175515  Silene menziesii subsp. dorrii F. W. Peirson 1931-7-31 s.n. Inyo Rock Creek Lake Basin, bank along road below Heart Lake. 3171 Comment
  RSA87362  Agrostis hyemalis F. W. Peirson 1931-7-31 9612 Inyo Rock Creek Lake Basin 3171 Comment
  RSA91644  Carex vernacula F. W. Peirson 1934-7-15 11228 Mono Along Red Lake stream, Virginia Lakes Basin. 3171 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
  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
  CAS-BOT-BC117784  Carex specifica Frank Warrington Peirson 1933-8-13 10849 Inyo Rock Creek Lake Basin, meadow at Heart Lake. 3200 Comment
  CAS-BOT-BC218398  Comastoma tenellum Frank W. Peirson 1933-8-22 s.n. Inyo Heart Lake Meadow, Rock Creek Lake Basin 3200 Comment
  CAS-BOT-BC239758  Ptilagrostis kingii F. W. Peirson 1940-9-10 13545 Inyo Heart Lake Meadow, Rock Creek Lake Basin 3200 Comment
  CAS-BOT-BC266361  Eriogonum nudum var. deductum Frank W. Peirson 1930-8-3 Inyo Rock Creek Lake Basin, about Heart Lake 3200 Comment
  CAS-BOT-BC28276  Carex scopulorum var. bracteosa Frank W. Peirson 1940-8-17 13559 Inyo Heart Lake Meadow, Rock Creek Lake Basin. 3200 Comment
  CAS-BOT-BC9408  Carex subnigricans F. W. Peirson 1940-8-17 s.n. Inyo Heart Lake Meadows, Rock Creek Lake Basin 3200 Comment
  JEPS31380  Gentianella tenella subsp. tenella Frank W. Peirson 1931-7-21 9482 Inyo meadow at and elsewhere Heart Lake; Rock Creek Lake Basin 3200 Comment
  RSA65052  Silene sargentii F. W. Peirson 1930-8-3 9065 Inyo east of Heart Lake, Rock Creek Lake Basin. 3200 Comment
  UC1026420  Carex abrupta F. W. Peirson 1940-8-17 13558 Inyo Heart Creek Meadow Rock Creek Lake Basin, Heart Creek Meadow 3200 Comment
  UC1026431  Carex pellita F. W. Peirson 1940-8-17 13561 Inyo Heart Lake Meadow Rock Creek Lake Basin 3200 Comment
  UC638461  Potentilla pensylvanica var. ovium Frank W. Peirson 1931-7-21 9474 Inyo meadow at Heart Lake; Rock Creek Lake Basin 3200 Comment
  UC698469  Eleocharis suksdorfiana Frank W. Peirson 1940-8-17 Inyo Heart Lake Meadow Rock Creek Lake Basin 3200 Comment
  CAS-BOT-BC34220  Carex canescens Frank W. Peirson 1933-8-11 10833 Inyo Rock Creek Lake Basin. East chain lakes. 3200 Comment
  CAS-BOT-BC419959  Polygonum polygaloides subsp. kelloggii Frank W. Peirson 1933-8-15 s.n. Inyo Near Heart Lake. Rock Creek Lake Basin 3200 Comment
  SEINET7575690 Image available Carex specifica Frank W. Peirson 1933-8-13 10849 Inyo Rock Creek Lake Basin. 3200 Comment
  RSA100547  Symphoricarpos vaccinioides F. W. Peirson 1930-8-3 9067 Inyo On margin of Heart Lake, Rock Creek Lake Basin. 3201 Comment
  RSA65957  Eriogonum umbellatum var. nevadense F. W. Peirson 1931-7-21 9438 Inyo Near Heart Lake, Rock Creek Lake Basin. 3201 Comment
  RSA82276  Castilleja lemmonii F. W. Peirson 1921-8-15 1157 Fresno Cartridge Creek, tributary of Middle Fork of Kings River. 3201 Comment
  RSA85786  Potentilla glandulosa subsp. nevadensis F. W. Peirson 1930-8-3 9066 Inyo On margin of Heart Lake, Rock Creek Lake Basin. 3201 Comment
  RSA86304  Ivesia pygmaea F. W. Peirson 1916-8-25 1962 Tulare Silver Lake, Little Kern Tributary, Sierra Nevada. 3201 Comment
Read comments
Feb 25 2011
  RSA88661  Carex fissuricola F. W. Peirson 1916-8-25 1629 Tulare Silver Lake, tributary to Little Kern river, Sierra Nevada 3201 Comment
  POM9938  Pellaea breweri F. W. Peirson 1921-8-18 1509 Inyo Taboose Pass 3201 Comment
Read comments
Jan 23 2011
  RSA66016  Eriogonum nudum var. deductum F. W. Peirson 1931-8-3 9063 Inyo East of Heart Lake, Rocky Creek lake Basin, 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
  RSA80085  Mimulus tilingii F. W. Peirson 1930-8-3 9057 Inyo along stream from Ruby Lake near Heart Lake, Rock Creek Lake Basin. 3201 Comment
  RSA80652  Hypericum androsaemum F. W. Peirson 1931-8-2 9464 Inyo Heart lake, Rock Creek Lake Basin 3201 Comment
  RSA86327  Ivesia lycopodioides subsp. megalopetala F. W. Peirson 1930-8-3 9052 Inyo West side of Heart Lake, Rock Creek Lake Basin, northern Inyo county 3201 Comment
  RSA90874  Carex utriculata F. W. Peirson 1933-8-11 10848 Inyo East Chain Lakes, Rock Creek Lake Basin, northern Inyo County. 3201 Comment
  RSA91836  Calamagrostis canadensis Frank W. Peirson 1933-8-11 10822 Inyo Lowest chain of lakes, Rock Creek Lake Basin, northern Inyo County. 3201 Comment
  RSA92115  Carex senta F. W. Peirson 1933-8-11 10834 Inyo East chain lake, Rock Creek Lake Basin, northern Inyo County. 3201 Comment
  RSA92149  Eleocharis quinqueflora F. W. Peirson 1930-8-8 9146 Inyo East of Heart Lake, Rock Creek Lake Basin 3201 Comment
  CAS-BOT-BC111189  Trichophorum clementis Frank Warrington Peirson 1934-7-27 11300 Inyo Geart Lake Meadow, Rock Creek Lake Basin 3215 Comment
  CAS-BOT-BC31884  Carex microptera Frank W. Peirson 1934-7-23 11401 Inyo Heart Lake Meadow, RockCreek Lake Basin. 3215 Comment
  CAS-BOT-BC20629  Carex douglasii Frank W. Peirson 1937-8-8 12212 Inyo Rock Creek Lake basin. Heart Lake region. 3215 Comment
  JEPS27458  Boechera retrofracta Frank W. Peirson 1937-8-6 12183 Inyo Box Lake Rock Creek Lake Basin 3215 Comment
  RSA91594  Carex canescens F. W. Peirson 1933-8-11 10833 Inyo East Chain lakes, Rock Creek Lake Basin, Sierra Nevada, northern Inyo County. 3216 Comment
  CAS-BOT-BC118818  Carex preslii Frank Warrington Peirson 1940-8-17 13022 Inyo Heart Lake Meadow, Rock Creek Lake Basin. 3230 Comment
  CAS-BOT-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
  JEPS16598  Anelsonia eurycarpa Frank W. Peirson 1934-7-13 11201 Mono in the cirque above Red Lake (Virginia Lakes Basin); Virginia Lakes Basin 3230 Comment
  JEPS27464  Gayophytum decipiens Frank W. Peirson 1937-8-4 12176 Inyo Heart Lake Region, Rock Creek Lake Basin 3230 Comment
  UC511760  Ribes inerme var. inerme Frank W. Peirson 1933-8-13 Inyo along the Escarpment w Heart Lake Meadow; Rock Creek Lake Basin 3230 Comment
  UC638464  Potentilla pseudosericea Frank W. Peirson 1934-7-13 11203 Mono in the cirque above Red Lake (Virginia Lakes Basin); , above Red Lake 3230 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
  UC643223  Eriogonum incanum Frank W. Peirson 1940-8-1 12987 Inyo dry border of Heart Lake Meadow Rock Creek Lake Basin, Heart Lake Meadow 3230 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
  CAS-BOT-BC228812  Cistanthe umbellata F. W. Peirson 1940-7-31 s.n. Inyo Rock Creek Lake Basin 3230 Comment
  UC643226  Ivesia lycopodioides subsp. megalopetala Frank W. Peirson 1940-7-31 Inyo Heart Lake Meadow; Rock Creek Lake Basin 3230 Comment
  RSA68705  Lilium kelleyanum Frank W. Peirson 1933-8-13 10796 Inyo Heart Lake Meadow, Rock Creek Lake Basin, Sierra Nevada. 3232 Comment
  POM203753  Linanthus pungens subsp. pulchriflorus F. W. Peirson 1934-7-25 s.n. Inyo Rock Creek Lake Basin. Foot of escarpment at Heart Lake. 3232 Comment
  RSA0063075  Heuchera rubescens var. alpicola F. W. Peirson 1911-8-3 s.n. Fresno Rae Lake, Sierra Nevada. 3232 Comment
  RSA65831  Descurainia californica F. W. Peirson 1931-7-17 9457 Inyo Heart Lake, Rock Creek Lake Basin, northern Inyo Co. 3232 Comment
  RSA68697  Lilium pardalinum Frank W. Peirson 1937-8-4 12177 Inyo Upper part of Heart Lake Meadow, not far from the Ruby stream, Rock Creek Lake Basin. 3232 Comment
  RSA70580  Sisyrinchium idahoense Frank W. Peirson 1933-8-6 10773 Inyo Heart Lake Meadow, Rock Creek Lake Basin, Sierra Nevada. 3232 Comment
  RSA78500  Carex abrupta F. W. Peirson 1940-8-17 13570 Inyo Heart Lake Meadow, Rock Creek Lake Basin. northern Inyo County. 3232 Comment
  RSA78503  Carex jonesii F. W. Peirson 1940-8-17 13571 Inyo Heart Lake Meadow, Rock Creek Lake Basin. northern Inyo County. 3232 Comment
  RSA83344  Monardella odoratissima subsp. glauca F. W. Peirson 1934-7-26 11284 Inyo Rock Creek Lake Basin. 3232 Comment
  RSA84488  Actaea rubra F. W. Peirson 1931-7-24 9449 Inyo At foot of escarpment of Heart Lake, Rock Creek lake Basin. 3232 Comment
  RSA93623  Antennaria umbrinella F. W. Peirson 1940-8-6 12958 Inyo Dry border of Heart Lake Meadow near its upper end, Rock Creek Lake Basin, northern Inyo Co. 3232 Comment
  RSA94578  Achillea millefolium var. alpicola F. W. Peirson 1940-7-31 12969 Inyo Dry border of Heart Lake Meadow at upper end; Rock Creek Lake Basin, northern Inyo Co., California. 3232 Comment
  RSA95155  Hieracium horridum F. W. Peirson 1919-8-24 1499 Fresno Rae Lake, Sierra Nevada. 3232 Comment
  RSA66207  Arabis inyoensis F. W. Peirson 1940-8-1 12974 Inyo Rock Creek Lake Basin 3247 Comment
  CAS-BOT-BC236007  Poa secunda subsp. secunda Frank W. Peirson 1940-8-19 12934 Inyo Rock Creek Lake Basin, in the defile across the Transverse Ridge 3261 Comment
  CAS-BOT-BC267099  Triglochin palustris Frank W. Peirson 1940-8-4 12180 Inyo Rock Creek Lake Basin, on E side of canyon 3261 Comment
  CAS-BOT-BC28067  Carex illota Frank W. Peirson 1933-8-4 10831 Inyo Broken country south of Long Lake, Rock Creek Lake Basin. 3261 Comment
  SEINET179664 Image available Poa stebbinsii Frank W. Peirson 1933-8-6 10816 Inyo Rock Creek Lake Basin, in small meadow eastward from Long Lake. 3261 Comment
  UC1026429  Carex illota F. W. Peirson 1940-8-18 13573 Inyo along stream s Long Lake; Rock Creek Lake Basin 3261 Comment
  UC570579  Rumex paucifolius Frank W. Peirson 1935-7-16 11516 Inyo upper end Heart Lake Meadow; Rock Creek Basin, Heart Lake Meadow 3261 Comment
  CAS-BOT-BC114824  Carex whitneyi Frank Warrington Peirson 1931-7-24 9415 Inyo Rock Creek Lake Basin. West shore Long Lake in dry location. 3261 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
  SEINET6632133  Poa nervosa Frank W. Peirson 1934-1 Inyo Rock Creek Lake Basin 3261 Comment
  UC643216  Thalictrum sparsiflorum Frank W. Peirson 1940-8-5 Inyo margin of lake on e side canyon (and at base of Transverse Ridge); Rock Creek Lake Basin 3261 Comment
  POM254385  Luzula orestera F. W. Peirson 1940-8-1 12966 Inyo Long Lake, Rock Creek Lake Basin. 3262 Comment
  RSA69737  Luzula orestera F. W. Peirson 1940-8-1 12966 Inyo Long Lake and stream valleys southward, Rock Creek Lake Basin. 3262 Comment
  RSA78506  Carex aurea F. W. Peirson 1940-8-18 13574 Inyo South of Long Lake, Rock Creek Lake Basin, northern Inyo County. 3262 Comment
  RSA72160  Epilobium anagallidifolium F. W. Peirson 1931-7-24 s.n. Inyo West shore of Long Lake, Rock Creek Lake Basin, Sierra Nevada. 3262 Comment
  RSA77776  Viola macloskeyi F. W. Peirson 1931-7-22 9465 Inyo Long Lake, Rock Creek Lake Basin. 3262 Comment
  RSA85010  Adiantum aleuticum F. W. Peirson 1931-7-22 9391 Inyo West shore of Long Lake, Rock Creek Lake Basin 3262 Comment
  RSA84603  Heuchera rubescens var. rydbergiana F. W. Peirson 1931-7-24 9462 Inyo west side of Long Lake, Rock Creek Lake Basin. 3277 Comment
  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
  RSA90437  Astragalus kentrophyta var. danaus F. W. Peirson 1921-8-18 2802 Inyo Taboose Pass, Sierra Nevada. 3277 Comment
  RSA92867  Urtica dioica subsp. holosericea F. W. Peirson 1931-7-24 9429 Inyo west side of Long Lake, Rock Creek Lake Basin. 3277 Comment
  SD87683  Erigeron clokeyi Frank W Peirson 1931-8-2 Inyo Rock Creek Lake Basin, west of Heart Lake 3290 Comment
  CAS-BOT-BC22201  Carex helleri Frank W. Peirson 1934-7-23 s.n. Inyo Rock Creek Lake Basin. Dry location on the east side of the Canyon. 3291 Comment
  RSA160278  Senecio canus F. W. Peirson 1929-7-24 s.n. Inyo Green Lake Region, Bishop Creek. 3291 Comment
  UC643210  Minuartia nuttallii subsp. gracilis Frank W. Peirson 1937-8-3 Inyo near Chickenfoot Lake; Rock Creek Lake Basin 3291 Comment
  UC643220  Boechera Frank W. Peirson 1940-8-6 12975 Inyo slope w Heart Lake; Rock Creek Lake Basin 3291 Comment
  CAS-BOT-BC389804  Silene sargentii Frank W. Peirson 1937-8-7 s.n. Inyo Rock Creek Lake Basin. In the main gorge south of Long Lake 3291 Comment
  GH424181  Scirpus clementis F. W. Peirson 1937-8-3 Unknown Rocky Creek Lake Basin, Shores of Chickenfoot Lake 3291 Comment
Read comments
Jan 12 2017
  JEPS27460  Boechera howellii Frank W. Peirson 1937-8-3 12172 Inyo bank near Chickenfoot Lake (Rock Creek Lake Basin); Rock Creek Lake Basin 3291 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
  POM254419  Triglochin palustris F. W. Peirson 1940-8-4 s.n. Inyo Rock Creek Lake Basin 3293 Comment
  RSA70093  Juncus parryi F. W. Peirson 1930-8-4 9081 Inyo Upper Rock Creek Lake Basin. 3293 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
  RSA86349  Pinus jeffreyi F. W. Peirson 1931-7-30 9396 Inyo Along Ruby Stream. Rock Creek Lake Basin, at 10,800 ft. 3293 Comment
  RSA66514  Arabis platysperma var. howellii F. W. Peirson 1934-7-23 11297 Inyo Rock Creek Lake Basin 3293 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
  RSA85780  Sibbaldia procumbens F. W. Peirson 1931-7-18 9477 Inyo Road to Morgan Pass, Chickenfoot Lake region; Rock Creek Lake Basin. 3293 Comment
  RSA91006  Erigeron petiolaris F. W. Peirson 1933-8-5 10812 Inyo soil pockets on Transverse Ridge, Rock Creek Lake Basin 3293 Comment
  RSA93001  Erigeron clokeyi F. W. Peirson 1939-8-4 12771 Inyo Near one of the E Chain lakes, Rock Creek lake Basin, Northern Inyo County. 3293 Comment
  RSA93004  Erigeron clokeyi F. W. Peirson 1940-8-3 12964 Inyo Rock Creek Lake Basin, slope west of Heart Lake. 3293 Comment
  RSA93091  Erigeron tener F. W. Peirson 1934-7-28 11289 Inyo Rock Creek Lake Basin along the south slope of the Transverse Glacial Ridge. 3293 Comment
  CAS-BOT-BC28599  Achillea millefolium Frank W. Peirson 1933-8-19 s.n. Inyo Near Ruby Falls, Rock Creek Lake Basin 3322 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
  POM203755  Ribes inerme F. W. Peirson 1934-7-20 11271 Inyo At Ruby Falls, Rock Creek Lake Basin, northern Inyo County. 3323 Comment
  RSA72163  Epilobium anagallidifolium F. W. Peirson 1919-8-24 763 Fresno Above Rae Lake, Sierra Nevada. 3323 Comment
Read comments
Dec 23 2018
  RSA85683  Potentilla diversifolia F. W. Peirson 1934-7-29 11293 Inyo Meadow at Ruby Falls, Rock Creek Lake Basin, extreme northern Inyo county. 3323 Comment
  RSA91830  Calamagrostis muiriana F. W. Peirson 1934-7-20 12617 Inyo At Ruby Falls, Rock Creek Lake Basin, northern Inyo County. 3323 Comment
  CAS-BOT-BC217525  Galium hypotrichium subsp. hypotrichium Frank W. Peirson 1931-7-19 9497 Inyo Rock Creek Lake Basin 3352 Comment
  CAS-BOT-BC41154  Draba lemmonii F. W. Peirson 1940-8-2 s.n. Inyo Rock Creek Lake Basin. Below Ruby Lake. 3352 Comment
  CAS-BOT-BC9406  Carex subnigricans Frank W. Peirson 1934-7-20 s.n. Inyo Rock Creek Lake Basin 3352 Comment
  CAS-BOT-BC34846  Carex deflexa var. boottii Frank W. Peirson 1937-8-7 12211 Inyo Rock Creek Lake Basin. Southwest part of basin. 3352 Comment
  SEINET10490075  Lupinus lyallii var. danaus Frank W. Peirson 1921-8-8 Peirson 2552 Inyo Piute Pass, E slope, Sierra Nevada Mountains. 3353 Comment
  RSA72166  Epilobium hallianum F. W. Peirson 1908-7-15 762 Tulare Rock Creek, tributary of Kern River, Sierra Nevada 3354 Comment
  RSA79944  Cryptantha nubigena F. W. Peirson 1934-7-24 11279 Inyo West of Heart Lake, Rock Creek Lake Basin, northern Inyo County. 3354 Comment
  RSA80046  Castilleja nana F. W. Peirson 1937-8-8 s.n. Inyo Tranverse Ridge, Rock Creek Lake Basin. 3354 Comment
  POM203889  Lomatium torreyi F. W. Peirson 1933-8-5 s.n. Inyo Rock Creek Lake Basin: summit of glacial ridge 3354 Comment
  RSA0076361  Sedum lanceolatum F. W. Peirson 1921-8-8 2717 Inyo East slope of Piute Pass. 3354 Comment
  RSA95159  Hieracium horridum F. W. Peirson 1931-7-20 9511 Inyo Below Ruby Lake stream, Rock Creek Lake Basin, Sierra Nevada, northern Inyo County. 3354 Comment
  GH378812  Boechera lyallii F. W. Peirson 1940-8-2 12973 Unknown east side Ruby stream below Ruby Lake, Rock Creek Lake Basin 3383 Comment
  RSA91614  Carex congdonii F. W. Peirson 1934-7-22 11396 Inyo Shore of Upper Glacial Lake, Rock Creek Lake Basin. 3383 Comment
  RSA80369  Mimulus leptaleus F. W. Peirson 1934-7-27 11286 Inyo Open level along trail to Mono Pass, Rock Creek Lake Basin. 3384 Comment
  RSA86329  Ivesia lycopodioides F. W. Peirson 1934-7-12 11193 Mono In pass at the head of upper Virginia Lakes Basin 3384 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
  SBBG28979  Erythranthe breweri F. W. Peirson 1940-8-10 12963 Inyo Ruby Lake, above Rock Crk Lake 3398 Comment
  SD87817  Ivesia lycopodioides Frank W. Peirson 1940-8-10 12961 Inyo Rock Creek Lake Basin, on the delta at the inlet of Ryby Lake 3398 Comment
Read comments
May 31 2012
  UC511766  Collinsia parviflora Frank W. Peirson 1933-8-3 10779 Inyo Rock Creek Lake Basin, Ruby Lake Ruby Lake; Rock Creek Lake Basin, Ruby Lake 3398 Comment
  UCD93741  Trisetum spicatum F. W. Peirson 1930-8-7 9133 Inyo Rock Creek Lake Basin, west shore of Ruby Lake. 3398 Comment
  RSA94584  Achillea millefolium var. alpicola F. W. Peirson 1931-7-20 9506 Inyo Shore of Ruby Lake, Rock Creek Lake Basin, Sierra Nevada. 3398 Comment
  RSA66498  Arabis lemmonii var. lemmonii F. W. Peirson 1940-8-2 12976 Inyo shore of Ruby Lake near outlet; Rock Creek Lake Basin, northern Inyo Co. 3399 Comment
  RSA65613  Stellaria longipes F. W. Peirson 1930-10-16 9128 Inyo West shore of Ruby Lake, Rock Creek Lake Basin, Sierra Nevada 3399 Comment
  RSA65665  Montia chamissoi F. W. Peirson 1930-8-7 9126 Inyo Ruby Lake, Rock Creek Lake Basin. 3399 Comment
  RSA72115  Epilobium glaberrimum subsp. fastigiatum F. W. Peirson 1930-8-7 9130 Inyo Rock Creek Lake Basin, Sierra Nevada 3399 Comment
  RSA90204  Bromus marginatus F. W. Peirson 1931-7-30 9407 Inyo Ruby Lake, Rock Creek Lake Basin. 3399 Comment
  CAS-BOT-BC217523  Galium hypotrichium subsp. hypotrichium Frank W. Peirson 1931-8-2 9498 Inyo Rock Creek Lake Basin 3413 Comment
  RSA66010  Eriogonum rosense F. W. Peirson 1933-8-5 10778 Inyo Upper part of the Transverse Ridge, Rock Creek Lake Basin. 3415 Comment
  JEPS56564  Eriogonum rosense Frank W. Peirson 1934-7-21 Inyo Rock Creek Lake Basin; nw Inyo Co. 3444 Comment
  POM175532  Salix arctica F. W. Peirson 1930-8-7 9121 Inyo Rock Creek Lake Basin, valley south of Ruby Lake. 3445 Comment
  POM203749  Draba lemmonii F. W. Peirson 1934-7-21 9453 Inyo Rock Creek Lake Basin; Cirque on east side of canyon 3445 Comment
  CAS-BOT-BC22203  Carex helleri Frank W. Peirson 1934-7-21 11398 Inyo Rock Creek Lake Basin. In the cirque on the east slope. 3474 Comment
  JEPS27452  Drymocallis pseudorupestris var. crumiana Frank W. Peirson 1937-8-11 12195 Inyo Rock Creek Lake Basin above East Recess; Rock Creek Lake Basin 3474 Comment
  JEPS41301  Erigeron aphanactis var. congestus Frank W. Peirson 1922-8-23 San Bernardino Summit San Gorgonio Peak 3474 Comment
  JEPS67189  Luzula spicata Frank W. Peirson 1933-8-9 Inyo Rock Creek Lake Basin 3474 Comment
  RSA0063187  Heuchera parishii F. W. Peirson 1922-8-23 680 San Bernardino Summit of Mount San Gorgonio. 3476 Comment
  RSA69735  Luzula orestera F. W. Peirson 1930-8-7 9116 Inyo Valley southward from Ruby Lake, Rock Creek Lake Basin. 3476 Comment
  RSA88678  Carex helleri F. W. Peirson 1934-7-21 11398 Inyo East slope of Rock Creek Lake Basin, northern Inyo County. 3476 Comment
  RSA94720  Senecio fremontii F. W. Peirson 1923-8-24 3994 San Bernardino Down southeast slope of summit of Mount San Gorgonio Peak 3476 Comment
  RSA74851  Phacelia frigida subsp. dasyphylla F. W. Peirson 1929-7-24 8551 Inyo S of Green lake, Bishop Creek Region, Sierra Nevada 3476 Comment
  RSA93272  Ericameria discoidea F. W. Peirson 1919-8-26 1240 Fresno Mt. Baxter Cirque, Woods Lake side, Sierra Nevada 3476 Comment
  RSA85752  Potentilla wheeleri F. W. Peirson 1906-8-19 1979 San Bernardino Summit of San Gorgonio Peak 3491 Comment
  RSA90435  Oxytropis oreophila F. W. Peirson 1906-8-19 2008 San Bernardino Summit of San Gorgonio Peak 3491 Comment
  CAS-BOT-BC16318  Boechera howellii Frank W. Peirson 1929-7-22 8538 Inyo Bishop Pass. 3505 Comment
  UC511727  Galium hypotrichium subsp. hypotrichium Frank W. Peirson 1933-8-8 10770 Inyo steep mt. slope w Heart Lake; Rock Cr. Lake Basin 3505 Comment
  UC511752  Oreostemma alpigenum var. andersonii Frank W. Peirson 1933-8-21 Inyo strip meadow about Upper Ruby Lake; Rock Creek Lake Basin 3505 Comment
  SEINET7575754 Image available Carex spectabilis Frank W. Peirson 1933-8-21 10839 Inyo Rock Creek Lake Basin. 3505 Comment
  RSA65029  Silene parishii var. viscida F. W. Peirson 1929-7-22 8537 Inyo Among rocks, foot of steep trial on north slope of Bishop Pass 3506 Comment
  POM203381  Drymocallis pseudorupestris var. crumiana F. W. Peirson 1934-7-21 11272 Inyo Rock Creek Lake Basin. Recess or cirque on E slope, rocky talus slope far above the cirque floor 3506 Comment
  POM20538  Trisetum spicatum F. W. Peirson 1919-8-5 s.n. Inyo Center Basin. 3506 Comment
  RSA72119  Epilobium obcordatum F. W. Peirson 1930-8-5 9088 Inyo Along stream course from Mono Pass and west of Ruby Lake; Rock Creek Lake Basin; Sierra Nevada. 3506 Comment
  RSA91000  Erigeron petiolaris F. W. Peirson 1919-8-8 1294 Tulare Twin Lake Cirque, Mt. Whitney region, Sierra Nevada. 3506 Comment
  RSA91003  Erigeron petiolaris F. W. Peirson 1921-8-11 2759 Fresno SW slope of Mt. Darwin, Evolution Lake region, Sierra Nevada 3506 Comment
  RSA90258  Astragalus lentiginosus var. ineptus F. W. Peirson 1929-7-24 8544 Inyo along the summit area, Inconsolable Range. 3581 Comment
  RSA90428  Oxytropis borealis var. viscida F. W. Peirson 1929-7-24 8547 Inyo Along summit ridge of Inconsolable Range 3582 Comment
  POM171910  Poa glauca subsp. rupicola F. W. Peirson 1930-8-5 9105 Inyo Rock Creek Lake Basin; Trail to Mono Pass 3598 Comment
  RSA79845  Penstemon davidsonii F. W. Peirson 1930-8-5 9100 Inyo Rock Creek Lake Basin, Trail to Mono Pass 3598 Comment
  CAS-BOT-BC34110  Carex breweri Frank W. Peirson 1930-8-5 9095 Inyo Rock Creek Lake Basin. In gorge east of Mono Pass. 3627 Comment
  RSA90266  Agrostis variabilis F. W. Peirson 1930-8-10 91970 Inyo In cirque at foot of Mt. Dade, Rock Creek Lake Basin, Sierra Nevada, extreme northern Inyo County. Alt. 11,900 ft. 3628 Comment
  SD87579  Boechera lemmonii Frank W. Peirson 1934-7-27 11299 Inyo Rock Creek Lake Basin, Gorge below Mono Pass 3630 Comment
  JEPS20066  Oxytropis borealis var. australis Frank W. Peirson 1929-7-24 8547 Inyo Inconsolable Range 3657 Comment
  RSA66131  Draba densifolia F. W. Peirson 1922-7-24 8549 a Inyo Inconsolable Range 3659 Comment
  RSA93643  Antennaria umbrinella F. W. Peirson 1937-8-9 12191 Inyo Above and to the north of Mono Pass (Rock Creek Lake Basin). 3674 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



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