Search Results — 2000 specimen records retrieved (1072 records with coordinates)
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Results for search: County=LOS ANGELES; Source=All; Collector=Peirson;   

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

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

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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  CAS-BOT-BC100416  Brickellia californica Frank W. Peirson 1922-9-14 4732 Los Angeles Cascade [Canon] Canyon, San Antonio Region 1402 Comment
  CAS-BOT-BC104140  Salix hindsiana Frank W. Peirson 1919-6-15 716 Los Angeles Pinyon Ridge, Rock Creek, San Gabriel Mts. 1371 Comment
  CAS-BOT-BC106135  Brickellia nevinii Frank W. Peirson 1921-10-22 2599 Los Angeles Head of Eaton Canyon [Canon] - San Gabriel Mts. 1645 Comment
  CAS-BOT-BC123033  Lessingia lemmonii var. peirsonii Frank Warrington Peirson 1923-6-9 3550 Los Angeles Liebre Mts., at lowest point between the divides of Pine and Oak Grove Canyons 1173 Comment
  CAS-BOT-BC123661  Malvastrum gabrielense Frank Warrington Peirson 1929-1-1 774 Los Angeles San Gabriel Mts. Aliso Creek. Arraster. 1097 Comment
  CAS-BOT-BC131689  Ericameria cooperi var. cooperi Frank W. Peirson 1921-5-19 1245 Los Angeles Little Rock Cr., San Gabriel Mts. Comment
  CAS-BOT-BC134966  Phoradendron bolleanum F. W. Peirson 1919-5-10 4682 Los Angeles Arrasler, San Gabirel Mts. 853 Comment
  CAS-BOT-BC145076  Phacelia mohavensis F. W. Peirson 1921-6-15 962 Los Angeles trail from Pine Flats to Chilao, San Gabriel Mts. 1676 Comment
  CAS-BOT-BC153047  Diplacus fremontii F. W. Peirson 1921-5-19 2744 Los Angeles Little Rock Creek, San Gabriel Mts. 1036 Comment
  CAS-BOT-BC159275  Garrya veatchii Frank W. Peirson 1919-11-30 2723 Los Angeles Eaton Canyon 609 Comment
  CAS-BOT-BC175107  Silene verecunda Frank W. Peirson 1922-7-5 4687 Los Angeles N. of Big Pines. San Gabriel Mts. Comment
  CAS-BOT-BC175149  Silene verecunda Frank W. Peirson 1920-9-15 2284 Los Angeles San Gabriel Mts. Baldy, north slope Comment
  CAS-BOT-BC179821  Centrostegia thurberi Frank W. Peirson 1919-5-10 28 Los Angeles Arraster Creek, San Gabirel Mts. 914 Comment
  CAS-BOT-BC179823  Centrostegia thurberi F. W. Peirson 1919-5-10 28 Los Angeles Arraster Creek, San Gabriel Mts. 914 Comment
  CAS-BOT-BC184334  Vulpia microstachys var. pauciflora F. W. Peirson 1921-5-20 5364 Los Angeles Little Rock Creek, San Gabriel Mts. 960 Comment
  CAS-BOT-BC184790  Vulpia myuros subsp. megalura F. W. Peirson 1923-4-10 3418 Los Angeles Summit Plateau, San Clemente Island Comment
  CAS-BOT-BC185858  Vulpia octoflora var. hirtella Frank W. Peirson 1922-5-30 4333 Los Angeles West spur of Mt. Lowe, San Gabriel Mts. 1371 Comment
  CAS-BOT-BC203922  Malacothamnus clementinus Frank W. Peirson 1923-4-9 3458 Los Angeles N. slope canon [canyon] at Lemmon [Lemon] Tank, San Clemente Is. Comment
  CAS-BOT-BC203923  Malacothamnus clementinus Frank W. Peirson 1923-4-9 3458 Los Angeles N. slope canon [canyon] at Lemmon [Lemon] Tank, San Clemente Is. Comment
  CAS-BOT-BC204749  Acmispon argophyllus var. argenteus Frank W. Peirson 1923-4-9 3468 Los Angeles 2 miles S.-E. of Wilsons [Wilson] Cove, San Clemente Comment
  CAS-BOT-BC204750  Acmispon argophyllus var. argenteus Frank W. Peirson 1923-4-9 3468 Los Angeles 2 mi. southeast of Wilsons [Wilson] Cove, San Clemente Comment
  CAS-BOT-BC205149  Lupinus elatus Frank W. Peirson 1921-6-16 2438 Los Angeles Waterman Ridge, San Gabriel Mts. 2286 Comment
  CAS-BOT-BC205150  Lupinus elatus F. W. Peirson 1918-6-10 89 Los Angeles San Gabriel Peak Comment
  CAS-BOT-BC205151  Lupinus elatus F. W. Peirson; Bulletin Torrey Club 1921-6-16 2438 Los Angeles Waterman Ridge Comment
  CAS-BOT-BC206225  Malacothamnus fasciculatus Frank W. Peirson 1918-10-26 114 Los Angeles Big Dalton Canyon, San Gabriel Mts. 762 Comment
  CAS-BOT-BC207240  Lupinus peirsonii Frank W. Peirson 1926-4-27 6671 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
  CAS-BOT-BC209704  Ribes quercetorum Frank W. Peirson 1922-6-3 2548 Los Angeles East of Oakgrove Canon [Canyon] Divide, Liebre Mts. Comment
  CAS-BOT-BC214319  Salvia dorrii var. pilosa Frank W. Peirson 1923-5-26 s.n. Los Angeles Rock Creek, San Gabriel Mts. 1371 Comment
  CAS-BOT-BC215332  Lupinus excubitus var. excubitus F. W. Peirson 1924-8-23 5052 Los Angeles San Gabriel River 411 Comment
  CAS-BOT-BC225494  Gilia nevinii Frank W. Peirson 1923-4-9 3433 Los Angeles Wilson's Cove, San Clemente Is. Comment
  CAS-BOT-BC226395  Gilia latiflora subsp. latiflora Frank W. Peirson 1921-5-19 2832 Los Angeles Little Rock Creek, San Gabriel Mts. 1036 Comment
  CAS-BOT-BC228641  Cryptantha traskiae Frank W. Peirson 1923-4-11 3421 Los Angeles Eagle Ranch, San Clemente Is., on sea bluff Comment
  CAS-BOT-BC231610  Lycium cooperi Frank W. Peirson 1921-5-19 1086 Los Angeles San Gabriel Mts., Little Rock Cr. Comment
  CAS-BOT-BC238985  Symphoricarpos rotundifolius Frank W. Peirson 1922-7-5 4506 Los Angeles Big Pines Camp, San Gabriel Mountains 2103 Comment
  CAS-BOT-BC238991  Symphoricarpos rotundifolius Frank W. Peirson 1922-7-6 s.n. Los Angeles San Gabriel Mts., Blue Ridge Comment
  CAS-BOT-BC240943  Collinsia parryi Frank W. Peirson 1923-5-21 3514 Los Angeles San Gabriel Mts., Fish Canon [Canyon] Comment
  CAS-BOT-BC240947  Collinsia parryi Frank W. Peirson 1923-5-21 3514 Los Angeles Fish Canyon, San Gabriel Mts. 731 Comment
  CAS-BOT-BC240951  Collinsia parryi Frank W. Peirson 1919-4-19 4719 Los Angeles San Gabriel Mts., Pacoima Canon [Canyon] Comment
  CAS-BOT-BC240956  Collinsia parryi Frank W. Peirson 1918-5-26 193 Los Angeles Toll Road to Mt. Wilson at Hennigers Flat, San Gabriel Mts. 868 Comment
  CAS-BOT-BC242780  Eriogonum davidsonii Frank W. Peirson 1919-7-29 18 Los Angeles Summit of Mt. Wilson, San Gabriel Mts. Comment
  CAS-BOT-BC248474  Eriogonum angulosum Frank W. Peirson 1921-11-11 4202 Los Angeles Elizabeth Lake Comment
  CAS-BOT-BC253462  Eriogonum gracile Frank W. Peirson 1923-10-7 4164 Los Angeles Newhall at R.R. Station, San Gabriel Mts. Comment
  CAS-BOT-BC25678  Boechera sparsiflora Frank W. Peirson 1919-6-14 662 Los Angeles San Gabriel Mountains. Rocky Creek. 1706 Comment
  CAS-BOT-BC264997  Eriogonum wrightii var. subscaposum Frank W. Peirson 1928-9-5 8193 Los Angeles Road from Rock Creek to Big Pines, San Gabriel Mts. 1676 Comment
  CAS-BOT-BC268163  Eriogonum umbellatum var. minus Frank W. Peirson 1929-7-1 8446 Los Angeles Mt. Pacifico, San Gabriel Mts. 1981 Comment
  CAS-BOT-BC268205  Eriogonum umbellatum var. munzii Frank W. Peirson 1923-8-30 4684 Los Angeles San Gabriel Mts. North of Big Pines Comment
  CAS-BOT-BC268210  Eriogonum umbellatum var. munzii Frank W. Peirson 1922-7-5 4684 Los Angeles Peak north of Big Pines Camp, San Gabriel Mountains 2209 Comment
  CAS-BOT-BC277830  Chaenactis santolinoides Frank W. Peirson 1920-6-10 241 Los Angeles Summit Mt. Wilson 1752 Comment
  CAS-BOT-BC277831  Chaenactis santolinoides Frank W. Peirson 1921-6-18 2710 Los Angeles Divide north of Mt. Islip, San Gabriel Mts. 2042 Comment
  CAS-BOT-BC293120  Ericameria pinifolia Frank W. Peirson 1918-10-20 s.n. Los Angeles Rubio Wash at New York Ave., Altadena Comment
  CAS-BOT-BC304323  Galinsoga parviflora F. W. Peirson 1931-4-11 9375 Los Angeles 1077 New York Ave, Altadena Comment
  CAS-BOT-BC30948  Acamptopappus sphaerocephalus Frank W. Peirson 1921-5-21 2407 Los Angeles Little Rock Creek, San Gabriel Mts. 975 Comment
  CAS-BOT-BC311264  Heterotheca sessiliflora subsp. echioides F. W. Peirson 1923-10-7 4163 Los Angeles Newhall at Railway Station, San Gabriel Mts. Comment
  CAS-BOT-BC323295  Malacothrix foliosa Frank W. Peirson 1923-4-12 3463 Los Angeles Wilson's Cove, San Clemente Island Comment
  CAS-BOT-BC32931  Corethrogyne filaginifolia var. filaginifolia Frank Warrington Peirson 1923-10-7 4159 Los Angeles San Gabriel Mts. Newhall, Railroad Station Comment
  CAS-BOT-BC32998  Calystegia peirsonii Frank Warrington Peirson 1923-5-27 3537 Los Angeles San Gabriel Mts. Rock Cr. 1295 Comment
  CAS-BOT-BC339290  Lessingia glandulifera var. glandulifera F. W. Peirson 1919-8-30 1261 Los Angeles Between Mohave and Lancaster in n. Los Angeles Co. Comment
  CAS-BOT-BC342195  Logfia filaginoides F. W. Peirson 1921-6-20 5278 Los Angeles West fork San Gabriel River, San Gabriel Mts. 533 Comment
  CAS-BOT-BC356543  Pseudognaphalium biolettii Frank W. Peirson 1923-4-12 3465 Los Angeles Wilsons Cove. San Clemente Is. Comment
  CAS-BOT-BC376010  Stylocline gnaphaloides F. W. Peirson 1921-5-20 2789 Los Angeles Little Rock Creek, San Gabriel Mts. 1097 Comment
  CAS-BOT-BC402005  Gilia ochroleuca subsp. bizonata Frank W. Peirson 1919-5-10 268 Los Angeles Arraster [Arrastre] Creek, San Gabriel Mts. 914 Comment
  CAS-BOT-BC422743  Meconella denticulata Frank W. Peirson 1925-4-23 5806 Los Angeles San Gabriel Canyon below Forks 365 Comment
  CAS-BOT-BC432202  Lithophragma bolanderi Frank W. Peirson 1925-3-18 5469 Los Angeles Newhall Grade 381 Comment
  CAS-BOT-BC432203  Lithophragma bolanderi Frank W. Peirson 1922-6-3 3079 Los Angeles Collins Ranch, Liebre Mts. 1143 Comment
  CAS-BOT-BC53324  Frangula californica subsp. cuspidata Frank W. Peirson 1921-5-20 4442 Los Angeles Little Rock Creek, San Gabriel Mts. 975 Comment
  CAS-BOT-BC59208  Antennaria dimorpha F. W. Peirson 1921-6-15 2492 Los Angeles Pine Flats, headwaters of Tujunga, San Gabriel Mts. 1676 Comment
  CAS-BOT-BC6696  Phacelia austromontana Frank Warrington Peirson 1928-6-2 7940 Los Angeles San Gabriel Mts., S. Fork Rock Cr. 1828 Comment
  CAS-BOT-BC75817  Berberis pinnata Frank W. Peirson 1943-5-15 13462 Los Angeles Up the grade from Big Pines, San Gabriel Mountains. 2133 Comment
  CAS-BOT-BC83647  Solanum umbelliferum F. W. Peirson 1943-5-15 13550 Los Angeles Rock Creek, N slope of San Gabriel Mountains 1295 Comment
  CAS-BOT-BC97966  Symphyotrichum greatae Frank W. Peirson 1918-10-16 4733 Los Angeles Rubio [Canon] Canyon 731 Comment
  JEPS10258  Mimulus cardinalis F. W. Peirson 1918-7-9 194 Los Angeles San Antonio Canyon San Gabriel Mts. 1981 Comment
  JEPS10610  Mimulus pilosus Frank W. Peirson 1918-10-16 269 Los Angeles Pacoima Canyon San Gabriel Mountains 548 Comment
  JEPS10748  Pedicularis semibarbata Frank W. Peirson 1918-6-17 212 Los Angeles n slope North Baldy Baldy; San Gabriel Mountains 2743 Comment
  JEPS10828  Orobanche fasciculata Frank W. Peirson 1919-6-7 465 Los Angeles San Gabriel Mountains, Cow Canyon Divide. Comment
  JEPS11020  Mimulus floribundus Frank W. Peirson 1921-6-19 2456 Los Angeles Crystal Lake San Gabriel Mountains 1676 Comment
  JEPS11362  Mimulus nasutus F. W. Peirson 1918-5-19 197 Los Angeles back of Altadena; San Gabriel Mts., Millards Canyon 762 Comment
  JEPS11385  Penstemon speciosus Frank W. Peirson 1922-7-5 3193 Los Angeles Big Pines San Gabriel Mountains, Big Pines 2072 Comment
  JEPS11538  Mimulus guttatus Frank W. Peirson 1918-6-1 198 Los Angeles Eaton Canyon San Gabriel Mountains 640 Comment
  JEPS11571  Keckiella cordifolia Frank W. Peirson 1918-6-28 205 Los Angeles e of Rubio Canyon; San Gabriel Mountains 609 Comment
  JEPS11668  Orobanche californica subsp. feudgei Frank W. Peirson 1921-7-3 2489 Los Angeles San Gabriel Mountains. Ridge south of Swartout Valley. Comment
  JEPS11683  Orobanche bulbosa Frank W. Peirson 1919-5-14 417 Los Angeles e. trail Mt. Lowe; San Gabriel Mts., Mt. Lowe 1295 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
  JEPS12156  Solanum umbelliferum Frank W. Peirson 1918-6-16 186 Los Angeles Rock Creek; San Gabriel Mountains, Rock Creek 1447 Comment
  JEPS12262  Anemopsis californica Frank W. Peirson 1919-6-15 503 Los Angeles San Gabriel Mountain, Rock Creek Rock Creek; San Gabriel Mountain, Rock Creek 1295 Comment
  JEPS1233  Turricula parryi Frank W. Peirson 1918-6-30 170 Los Angeles Summit of Mount Wilson 1752 Comment
  JEPS12429  Lycium cooperi Frank W. Peirson 1921-5-19 1086 Los Angeles Little Rock Creek San Gabriel Mountains 944 Comment
  JEPS12530  Acamptopappus sphaerocephalus var. sphaerocephalus Frank W. Peirson 1921-5-19 24007 Los Angeles lower part, in wash Little Rock Creek canyon; San Gabriel Mountains 975 Comment
  JEPS12565  Deinandra fasciculata Frank W. Peirson 1918-6-28 236 Los Angeles e of Rubio Canyon; San Gabriel Mountains 609 Comment
  JEPS12574  Madia elegans Frank W. Peirson 1918-8-16 237 Los Angeles San Antonio Canyon San Gabriel Mountains 1341 Comment
  JEPS12671  Symphoricarpos rotundifolius var. parishii Frank W. Peirson 1921-6-17 2439 Los Angeles n of Waterman; San Gabriel Mountains 1859 Comment
  JEPS12738  Sambucus mexicana Frank W. Peirson 1919-4-24 391 Los Angeles canyon e Rubio; San Gabriel Mountains 548 Comment
  JEPS12816  Lonicera interrupta Frank W. Peirson 1919-6-13 264 a Los Angeles Rock Creek San Gabriel Mountains 1295 Comment
  JEPS12848  Lonicera hispidula var. vacillans Frank W. Peirson 1918-6-30 218 Los Angeles Mt. Wilson Toll Road San Gabriel Mountains 1158 Comment
  JEPS12859  Lonicera subspicata var. denudata Frank W. Peirson 1918-6-30 217 Los Angeles Mt. Wilson Toll Road San Gabriel Mountains 1371 Comment
  JEPS1287  Phacelia tanacetifolia Frank W. Peirson 1920-3-28 2101 Los Angeles Tujunga Canyon San Gabriel Mountains 457 Comment
  JEPS13657  Symphoricarpos mollis Frank W. Peirson 1919-5-18 440 Los Angeles Monrovia Canyon; San Gabriel Mountains 457 Comment
  JEPS1377  Nama demissa var. demissa Frank W. Peirson 1921-5-19 2415 Los Angeles Little Rock Creek , Little Rock Creek (San Gabriel Mountains) 1036 Comment
  JEPS13828  Salix lasiolepis Frank W. Peirson 1919-2-9 317 Los Angeles Fish Canyon; San Gabriel Mts., Fish Canyon Comment
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Dec 10 2014
  JEPS14151  Oreonana vestita Frank W. Peirson 1918-6-17 137 Los Angeles summit of North Baldy San Gabriel Mts.; , N. Baldy 2743 Comment
  JEPS1433  Nama californica Frank W. Peirson 1919-5-10 396 Los Angeles Arraster Creek; San Gabriel Mountains, Arraster Creek 914 Comment
  JEPS14677  Dodecatheon redolens Frank W. Peirson 1921-7-17 2516 Los Angeles Prairie Fork San Gabriel Riv , Prairie Fork-San Gabriel Riv (San Gabriel Mountains) 2133 Comment
  JEPS1475  Phacelia affinis Frank W. Peirson 1919-5-10 410 Los Angeles Arraster Creek San Gabriel Mountains 914 Comment
  JEPS15762  Yabea microcarpa Frank W. Peirson 1918-6-1 132 Los Angeles Eaton Canyon; San Gabriel Mountains 990 Comment
  JEPS1590  Emmenanthe penduliflora Frank W. Peirson 1918-6-10 168 Los Angeles Foothills east pf Rubio Canyon; San Gabriel Mts. 609 Comment
  JEPS15912  Osmorhiza berteroi Frank W. Peirson 1919-6-14 491 Los Angeles Rock Creek San Gabriel Mountains 1981 Comment
  JEPS15945  Osmorhiza brachypoda Frank W. Peirson 1918-5-19 135 Los Angeles Millards Canyon San Gabriel Mountains Comment
  JEPS164  Tauschia parishii F. W. Peirson 1918-6-10 136 Los Angeles summit of Mt. Lowe; San Gabriel Mts., summit of Mt. Lowe Comment
  JEPS16475  Veronica peregrina subsp. xalapensis Frank W. Peirson 1919-6-5 499 Los Angeles San Antonio Canyon; San Gabriel Mountains, San Antonio Canyon 1341 Comment
  JEPS1713  Eucrypta chrysanthemifolia var. chrysanthemifolia Frank W. Peirson 1918-6-10 167 Los Angeles foothills e Rubio Canyon; San Gabriel Mountains 609 Comment
  JEPS1805  Nemophila menziesii var. integrifolia Frank W. Peirson 1918-5-19 166 Los Angeles Millards Canyon , Millards Canyon (San Gabriel Mountains) 609 Comment
  JEPS1832  Pholistoma auritum Frank W. Peirson 1919-5-18 441 Los Angeles Monrovia Canyon San Gabriel Mts., Monrovia Canyon Comment
  JEPS18578  Brickellia californica Frank W. Peirson 1918-10-21 221 a Los Angeles West Fork San Gabriel River San Gabriel Mountains, West Fork San Gabriel River 1066 Comment
  JEPS18579  Brickellia californica Frank W. Peirson 1918-9-7 221 Los Angeles Head of Eaton Creek San Gabriel Mountains, Eaton Creek 1554 Comment
  JEPS18780  Brickellia nevinii Frank W. Peirson 1918-9-7 228 Los Angeles lowest part of Toll Road (to Mt. Wilson) (San Gabriel Mountains); , Toll Road (to Mt. Wilson) 411 Comment
  JEPS18979  Gutierrezia microcephala Frank W. Peirson 1923-9-1 4016 Los Angeles Sheep Creek San Gabriel Mountains, Sheep Creek 1524 Comment
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Aug 14 2013
  JEPS18984  Gutierrezia sarothrae Frank W. Peirson 1918-10-16 277 Los Angeles entrance to canyon Pacoima Canyon; San Gabriel Mountains, Pacoima Canyon 457 Comment
  JEPS19136  Ericameria cuneata var. cuneata Frank W. Peirson 1918-9-7 222 Los Angeles trail from Mt. Lowe to Mt. Wilson; San Gabriel Mountains 1615 Comment
  JEPS19138  Ericameria parishii var. parishii Frank W. Peirson 1918-8-16 224 Los Angeles Baldy San Gabriel Mountains, Mt. San Antonio, Baldy 2133 Comment
  JEPS19140  Ericameria pinifolia Frank W. Peirson 1918-8-17 223 Los Angeles San Antonio Canyon San Gabriel Mountains, San Antonio Canyon 1371 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
  JEPS19252  Ericameria cooperi var. cooperi Frank W. Peirson 1927-5-21 Los Angeles summit Mint Canyon Grade; San Gabriel Mts., Mint Canyon Grade Comment
  JEPS19277  Pycnanthemum californicum F. W. Peirson 1918-6-18 184 Los Angeles s Valyermo (vicinity of Devils Punch Bowl, watershed of Big Rock Creek, San Gabriel Mountains); San Gabriel Mts, Big Rock Creek watershed, Devils Punch Bowl 1219 Comment
  JEPS1976  Phacelia imbricata subsp. patula Frank W. Peirson 1921-6-16 2451 Los Angeles Mt. Waterman Ridge San Gabriel Mountains 2286 Comment
  JEPS1977  Phacelia imbricata subsp. patula F. W. Peirson 1918-6-30 165 Los Angeles Mt. Wilson San Gabriel Mts. (summit) 1752 Comment
  JEPS19910  Arctostaphylos parryana Frank W. Peirson 1919-5-10 429 Los Angeles Mt. Gleason 1737 Comment
Read comments
Aug 21 2014
  JEPS19961  Ambrosia acanthicarpa Frank W. Peirson 1918-10-16 271 Los Angeles in Pacoima Canyon 518 Comment
  JEPS20492  Pseudognaphalium californicum Frank W. Peirson 1918-6-28 235 Los Angeles foothills e of Rubio Canon; San Gabriel Mountains 609 Comment
  JEPS20504  Pseudognaphalium microcephalum Frank W. Peirson 1919-1-26 303 Los Angeles Rubio Canon San Gabriel Mts., Rubio Canon 548 Comment
  JEPS20558  Lessingia glandulifera var. glandulifera Frank W. Peirson 1918-10-26 294 Los Angeles San Gabriel Mountains, Big Dalton Canyon 609 Comment
  JEPS2056  Phacelia fremontii Frank W. Peirson 1919-5-10 400 Los Angeles Arraster Creek San Gabriel Mountains 914 Comment
  JEPS2116  Phacelia austromontana Frank W. Peirson 1928-6-2 7940 Los Angeles South Fork Rock Creek San Gabriel Range 1828 Comment
  JEPS21270  Baccharis salicifolia subsp. salicifolia F. W. Peirson 1919-3-29 353 Los Angeles San Gabriel Mountains, Rubio Canon 548 Comment
  JEPS2128  Phacelia longipes Frank W. Peirson 1919-4-19 381 Los Angeles Pacoima Canyon San Gabriel Mountains 487 Comment
  JEPS2131  Phacelia austromontana Frank W. Peirson 1921-7-3 2486 Los Angeles Trail ne of Rock Creek Divide (San Gabriel Mountains); San Gabriel Mountains 2133 Comment
  JEPS21516  Ericameria nauseosa var. bernardina Frank W. Peirson 1918-9-7 226 Los Angeles trail near Mt. Markham; San Gabriel Mts. 1645 Comment
  JEPS2172  Phacelia imbricata subsp. patula F. W. Peirson 1918-6-1 164 Los Angeles Eaton Canyon San Gabriel Mts. 670 Comment
  JEPS2179  Phacelia hubbyi Frank W. Peirson 1920-3-28 2100 Los Angeles Tujunga Canyon San Gabriel Mountains 457 Comment
  JEPS22260  Symphyotrichum greatae Frank W. Peirson 1918-10-16 274 Los Angeles Pacoima Canon San Gabriel Mountains 518 Comment
  JEPS2289  Phacelia cryptantha Frank W. Peirson 1928-6-2 7942 Los Angeles South F. Rock Creek San Gabriel Mts. Comment
  JEPS2294  Phacelia cryptantha Frank W. Peirson 1923-5-25 3529 Los Angeles Rock Creek San Gabriel Mountains 1295 Comment
  JEPS2359  Phacelia davidsonii Frank W. Peirson 1918-5-26 163 Los Angeles mt summit San Gabriel Mountains, Mount Wilson 1752 Comment
  JEPS2415  Heterotheca sessiliflora subsp. fastigiata Frank W. Peirson 1918-10-16 285 Los Angeles Pacoima Canyon San Gabriel Mountains 533 Comment
  JEPS2601 Image available Galium siccatum var. anotinum Frank W. Peirson 1918-7-8 215 Los Angeles Baldy San Gabriel Mountains, Mt. San Antonio; Mt. San Antonio (Baldy), Los Angeles Co. 2133 Comment
  JEPS2623 Image available Habenaria leucostachys var. virida F. W. Peirson 1918-7-8 12 Los Angeles San Antonio Canyon San Gabriel Mts.; San Antonio Canyon, San Gabriel Mts. 1828 Comment
  JEPS26402  Malacothamnus marrubioides F. W. Peirson 1921-7-1 774 Los Angeles Arraster Creek, San Gabriel Mts., Los Angeles Co. Comment
  JEPS26403  Malacothamnus clementinus Frank W. Peirson 1923-4-9 3458 Los Angeles n slope canyon from Lemon Tank; San Clemente Island Comment
  JEPS26408  Malacothamnus marrubioides F. W. Peirson 1921-7-1 774 Los Angeles Arraster Creek, San Gabriel Mts., Los Angeles Co. Comment
  JEPS2658 Image available Navarretia atractyloides var. flavida Frank W. Peirson 1921-6-20 2444 Los Angeles North Fork San Gabriel River San Gabriel Mountains; North Fork of San Gabriel River, San Gabriel Mts. 457 Comment
  JEPS26957  Senecio astephanus Frank W. Peirson 1920-6-10 1432 Los Angeles near Inspiration Point (on Mt. Lowe); San Gabriel Mts., Mt. Lowe 1371 Comment
  JEPS27002  Caulanthus heterophyllus Frank W. Peirson 1919-3-30 63 a Los Angeles Tujunga Canyon San Gabriel Mountains, Tujunga Canyon 426 Comment
  JEPS27006  Caulanthus major Frank W. Peirson 1918-6-17 65 Los Angeles Rock Creek San Gabriel Mountains, Rock Creek 1676 Comment
  JEPS2704 Image available Lithophragma scabrellum var. peirsonii F. W. Peirson 1922-6-3 Los Angeles Collins Ranch n. slope Liebre Mts.; Collins Ranch, N slope of Liebre Mts., Southern Calif. 1143 Comment
  JEPS273  Sanicula crassicaulis Frank W. Peirson 1919-5-18 431 Los Angeles San Gabriel Mountains, Monrovia Canyon Monrovia Canyon; San Gabriel Mountains, Monrovia Canyon 609 Comment
  JEPS27588  Gayophytum heterozygum F. W. Peirson 1918-6-30 130 Los Angeles Mt. Wilson San Gabriel Mountains (near summit) Comment
  JEPS27793  Lotus strigosus Frank W. Peirson 1918-5-26 323 Los Angeles Summit Mt. Wilson San Gabriel Mountains 1737 Comment
  JEPS2994  Osmorhiza brachypoda Frank W. Peirson 1919-5-21 451 Los Angeles Arroyo Seco San Gabriel Mountains 609 Comment
  JEPS31580  Camissoniopsis pallida subsp. pallida Frank W. Peirson 1919-6-14 478 Los Angeles Rock Creek San Gabriel Mountains 1524 Comment
  JEPS31619  Calystegia occidentalis subsp. fulcrata Frank W. Peirson 1919-6-14 497 Los Angeles Rock Creek , Rock Creek (San Gabriel Mountains) 1905 Comment
  JEPS31639  Calystegia peirsonii F. W. Peirson 1927-5-21 7301 Los Angeles Rock Creek , Rock Creek (San Gabriel Range) 1524 Comment
  JEPS31648  Calystegia macrostegia subsp. intermedia F. W. Peirson 1918-6-28 151 Los Angeles foothills e Rubio Canyon (San Gabriel Mountains); , fthills e of Rubio Canyon 579 Comment
  JEPS31666  Clarkia unguiculata Frank W. Peirson 1920-5-16 2086 Los Angeles Tujunga Canyon San Gabriel Mountains 457 Comment
  JEPS31693  Eremothera boothii subsp. decorticans Frank W. Peirson 1928-6-2 7949 Los Angeles Rock Cr. San Gabriel Mts. (main stream bed) 1371 Comment
  JEPS31698  Eremothera boothii subsp. decorticans Frank W. Peirson 1919-6-14 479 Los Angeles Rock Creek San Gabriel Mountains 1524 Comment
  JEPS31725  Camissonia strigulosa Frank W. Peirson 1919-3-30 344 Los Angeles Tujunga Canyon San Gabriel Mountains 441 Comment
  JEPS31726  Camissonia strigulosa Frank W. Peirson 1919-5-10 405 Los Angeles Arraster Creek San Gabriel Mountains 914 Comment
  JEPS31736  Eulobus californicus Frank W. Peirson 1919-3-27 349 Los Angeles hills w Arroyo Seco; San Gabriel Mountains 426 Comment
  JEPS31771  Camissoniopsis ignota Frank W. Peirson 1919-3-30 414 Los Angeles Tujunga Canyon San Gabriel Mountains 457 Comment
  JEPS32410  Solidago confinis Frank W. Peirson 1920-9-12 1230 Los Angeles Bear Flat Baldy Trail, San Grabriel Mts. 1676 Comment
  JEPS33729  Camissonia campestris Frank W. Peirson 1921-5-20 793 Los Angeles Little Rock Creek San Gabriel Mountains 1066 Comment
  JEPS34065  Pseudognaphalium stramineum F. W. Peirson 1920-9-17 2241 Los Angeles San Antonio Canyon San Gabriel Mountains, San Antonio Canyon 1341 Comment
  JEPS34066  Gnaphalium palustre F. W. Peirson 1918-7-9 234 Los Angeles San Antonio Canyon San Gabriel Mts., San Antonio Canyon 1341 Comment
  JEPS34120  Encelia actoni F. W. Peirson 1919-6-13 484 Los Angeles Rock Creek San Gabriel Mts., Rock Creek 1295 Comment
  JEPS34175  Chaenactis glabriuscula F. W. Peirson 1918-6-28 243 Los Angeles foothills e of (which is about 2 mi n of Pasadena) Rubio Canyon 609 Comment
  JEPS3448  Plantago patagonica Frank W. Peirson 1921-5-20 2410 Los Angeles Little Rock Creek San Gabriel Mountains 960 Comment
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Sep 26 2010
  JEPS34704  Eriophyllum confertiflorum var. confertiflorum F. W. Peirson 1924-6-16 Los Angeles Pasadena Comment
  JEPS34715  Eriophyllum confertiflorum var. confertiflorum F. W. Peirson 1919-5-10 409 Los Angeles Arraster Canyon San Gabriel Mts., Arraster Canyon 838 Comment
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Aug 21 2014
  JEPS34716  Eriophyllum confertiflorum var. confertiflorum F. W. Peirson 1918-7-7 240 Los Angeles Icehouse Canyon San Gabriel Mts., Icehouse Canyon 2133 Comment
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Dec 10 2014
  JEPS34718  Eriophyllum confertiflorum var. confertiflorum F. W. Peirson 1920-9-12 2276 Los Angeles s trail Baldy; San Gabriel Mts., Baldy 2438 Comment
  JEPS34886  Hulsea heterochroma F. W. Peirson 1919-7-3 514 Los Angeles Lukens Peak San Gabriel Mts. 1219 Comment
  JEPS35470  Helianthus gracilentus F. W. Peirson 1919-7-3 512 Los Angeles Lukens Peak (formerly called Sister Elsie Peak) San Gabriel Mountains (along dry ridges) 1219 Comment
  JEPS35537  Helenium bigelovii F. W. Peirson 1918-7-8 244 Los Angeles nw of North Ontario; San Antonio Canyon 1828 Comment
  JEPS35730  Eriogonum deflexum var. baratum Frank W. Peirson 1921-7-2 2471 Los Angeles Pallett Creek San Gabriel Mountains, Pallett Creek 1082 Comment
  JEPS35962  Anisocoma acaulis F. W. Peirson 1921-5-19 1468 Los Angeles Little Rock Creek; San Gabriel Mts. 1036 Comment
  JEPS36605  Malacothrix saxatilis var. tenuifolia F. W. Peirson 1920-5-3 2118 Los Angeles Big Tujunga Wash 335 Comment
  JEPS36641  Malacothrix glabrata F. W. Peirson 1921-6-20 2149 a Los Angeles North Fork San Gabriel River San Gabriel Mts. 762 Comment
  JEPS36729  Achyrachaena mollis F. W. Peirson 1921-4-10 1363 Los Angeles foot of San Dimas Canyon; San Gabriel Mts., San Dimas Canyon 426 Comment
  JEPS36880  Stephanomeria exigua subsp. coronaria Frank W. Peirson 1923-8-31 4014 Los Angeles Blue Ridge San Gabriel Mountains 2529 Comment
  JEPS36910  Achillea millefolium F. W. Peirson 1919-5-18 443 Los Angeles canyon Monrovia; San Gabriel Mts. 396 Comment
  JEPS36927  Artemisia californica F. W. Peirson 1918-9-15 245 Los Angeles near foot of Sister Elsie Peak trail Sister Elsie Peak (now Mount Lukens); San Gabriel Mountains 640 Comment
  JEPS36932  Artemisia douglasiana F. W. Peirson 1918-9-15 246 Los Angeles near foot of Sister Elsie trail; San Gabriel Mountains, Sister Elsie Peak/Mount Lukens 640 Comment
  JEPS37  Eriodictyon crassifolium var. nigrescens Frank W. Peirson 1918-5-19 171 Los Angeles Echo Mountain; San Gabriel Mountains, Echo Mountain 990 Comment
  JEPS37163  Lepidospartum squamatum F. W. Peirson 1918-10-16 275 Los Angeles Pacoima Canyon San Gabriel Mts., Pacoima Canyon 518 Comment
  JEPS37243  Packera ionophylla F. W. Peirson 1921-7-17 2511 Los Angeles Prairie Fork San Gabriel Mts., San Gabriel Mts. 2133 Comment
  JEPS37246  Senecio triangularis F. W. Peirson 1921-7-17 2509 Los Angeles San Gabriel River, Prairie Fork San Gabriel Mts. 2133 Comment
  JEPS37248  Senecio flaccidus var. douglasii F. W. Peirson 1919-6-13 481 Los Angeles Rock Creek San Gabriel Mts. 1325 Comment
  JEPS37251  Senecio californicus F. W. Peirson 1919-3-30 347 Los Angeles Big Tujunga Canyon San Gabriel Mts. 411 Comment
  JEPS37335  Quercus chrysolepis Frank W. Peirson 1918-5-19 16 Los Angeles Echo Mountain San Gabriel Range 1036 Comment
  JEPS37499  Packera ionophylla F. W. Peirson 1922-7-6 3195 Los Angeles Big Pines Region San Gabriel Mts. Comment
  JEPS37567  Rafinesquia californica F. W. Peirson 1918-6-4 251 Los Angeles foothills e Rubio Canyon (San Gabriel Mts., near Altadena); San Gabriel Mts. 609 Comment
  JEPS37777  Quercus durata var. gabrielensis Frank W. Peirson 1919-5-14 376 Los Angeles e trail Mt. Lowe San Gabriel Mountains, Mt. Lowe Comment
  JEPS37778  Quercus wislizeni Frank W. Peirson 1919-5-10 403 Los Angeles Mt. Gleason San Gabriel Mts. Comment
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Aug 21 2014
  JEPS38025  Quercus kelloggii Frank W. Peirson Jul 3 1921-May 26 1923 1708 Los Angeles Rock Creek San Gabriel Mountains Comment
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Mar 29 2014
  JEPS38026  Quercus Frank W. Peirson 1919-5-11 404 Los Angeles Arraster Creek San Gabriel Mountains Comment
  JEPS38496  Salix exigua Frank W. Peirson 1919-3-30 355 Los Angeles Tujunga Canyon San Gabriel Mts. Comment
  JEPS39094  Verbena lasiostachys var. lasiostachys Frank W. Peirson 1918-7-9 175 Los Angeles San Antonio Canyon; San Gabriel Mts 1981 Comment
  JEPS39203  Layia glandulosa F. W. Peirson 1921-5-19 2413 Los Angeles Little Rock Creek San Gabriel Mountains, Little Rock Creek 975 Comment
  JEPS39231  Epilobium ciliatum subsp. ciliatum F. W. Peirson 1919-4-16 382 Los Angeles Cajon Pass 685 Comment
  JEPS39236  Epilobium brachycarpum Frank W. Peirson 1918-8-16 126 Los Angeles San Antonio Canyon San Gabriel Mountains, San Antonio Mts. 1341 Comment
  JEPS39323  Chamerion angustifolium subsp. circumvagum Frank W. Peirson 1921-7-17 2506 Los Angeles Prairie Fork <of> San Gabriel River San Gabriel Mountains 2133 Comment
  JEPS39860  Rumex salicifolius var. salicifolius F. W. Peirson 1918-6-18 29 Los Angeles Lower Rock Creek San Gabriel Mts. 1219 Comment
  JEPS4000  Mimulus parishii Frank W. Peirson 1918-6-16 199 Los Angeles Rock Creek San Gabriel Mountains 1447 Comment
  JEPS40079  Aralia californica Frank W. Peirson 1918-7-13 131 Los Angeles Santa Anita Canyon San Gabriel Mts., Santa Anita Canyon 762 Comment
  JEPS40113  Umbellularia californica Frank W. Peirson 1919-1-25 312 Los Angeles San Gabriel Mountains, Arroyo Seco Arroyo Seco; San Gabriel Mountains, Arroyo Seco 381 Comment
  JEPS40241  Vitis girdiana Frank W. Peirson 1919-5-18 442 Los Angeles Monrovia Canyon San Gabriel Mts. 365 Comment
  JEPS40303  Platanus racemosa Frank W. Peirson 1919-3-27 341 Los Angeles Arroyo Seco Canyon San Gabriel Mountains 411 Comment
  JEPS40715  Dieteria canescens var. canescens Frank W. Peirson 1923-8-30 4008 Los Angeles Mescal Creek San Gabriel Mountains (very head) Comment
  JEPS41100  Iva axillaris subsp. robustior Frank W. Peirson 1921-7-2 1322 Los Angeles near n base San Gabriel Mountains (about 5 mi due n of Pearblossom); southern edge of Mohave Desert, Pallett Creek 1097 Comment
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Jul 28 2014
  JEPS4112  Gilia ochroleuca subsp. vivida Frank W. Peirson 1918-6-30 155 Los Angeles summit Mt. Wilson San Gabriel Mts., Mt. Wilson Comment
  JEPS41225  Mentzelia congesta Frank W. Peirson 1923-5-25 3523 Los Angeles San Gabriel Mountains, Rock Creek Comment
  JEPS41458  Erigeron breweri var. jacinteus F. W. Peirson 1922-7-21 3204 Los Angeles Little Baldy San Gabriel Mountains (summit) 2910 Comment
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Dec 10 2014
  JEPS41486  Erigeron foliosus var. foliosus Frank W. Peirson 1918-7-13 231 Los Angeles Santa Anita San Gabriel Mts., Santa Anita 914 Comment
  JEPS41667  Heuchera caespitosa Frank W. Peirson 1918-6-10 67 Los Angeles n of Pasadena (n slope of Mt. Lowe near the summit); San Gabriel Mountains, Mt. Lowe 1676 Comment
  JEPS41825  Conyza canadensis Frank W. Peirson 1918-10-16 273 Los Angeles Pacoima Canyon San Gabriel Mts., Pacoima Canyon 518 Comment
  JEPS41859  Corethrogyne filaginifolia Frank W. Peirson 1918-10-16 270 Los Angeles Pacoima Canyon; San Gabriel Mts. 548 Comment
  JEPS41860  Corethrogyne filaginifolia Frank W. Peirson 1918-10-15 229 Los Angeles Summit Sister Elsie Peak; San Gabriel Mts. Comment
  JEPS41931  Triteleia lugens Frank W. Peirson 1921-6-16 2458 Los Angeles along stream n Waterman Mountain; San Gabriel Range, Waterman Mountain 1859 Comment
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Jul 24 2018
  JEPS41979  Rhamnus crocea Frank W. Peirson 1919-3-27 339 Los Angeles w of Arroyo Seco; San Gabriel Mountains 396 Comment
  JEPS41980  Rhamnus californica subsp. californica Frank W. Peirson 1918-6-28 108 Los Angeles Rubio Canyon San Gabriel Mts. 579 Comment
  JEPS41982  Rhamnus ilicifolia Frank W. Peirson 1918-6-1 109 Los Angeles Eaton Canyon San Gabriel Mts. 609 Comment
  JEPS42268  Ceanothus cordulatus Frank W. Peirson 1920-9-14 2277 Los Angeles Coldwater Creek, Coldwater Canyon, in the trail fork head of San Antonio Divide San Gabriel Mtns, San Antonio Mtns Comment
  JEPS42284  Ceanothus oliganthus var. oliganthus Frank W. Peirson 1927-3-19 7116 Los Angeles Seminole Hot Springs Region Santa Monica Mountains 457 Comment
  JEPS42305  Ceanothus greggii var. vestitus F. W. Peirson 1919-6-14 415 a Los Angeles san Gabriel Mts. 1371 Comment
  JEPS42337  Ceanothus leucodermis Frank W. Peirson 1918-6-10 112 Los Angeles San Gabriel Peak 1828 Comment
  JEPS42398  Ceanothus integerrimus Frank W. Peirson 1920-5-16 2138 Los Angeles Tujunga Canyon San Gabriel Mts. 518 Comment
  JEPS42404  Ceanothus leucodermis Frank W. Peirson 1920-9-14 2281 Los Angeles Coldwater Canyon San Gabriel Mts. (San Antonio Mts) Comment
  JEPS42411  Ceanothus oliganthus var. oliganthus Frank W. Peirson 1918-6-30 113 Los Angeles Toll Road Mt. Wilson; , Toll Road 1280 Comment
  JEPS42575  Barbarea orthoceras Frank W. Peirson 1922-7-5 3166 Los Angeles Big Pines San Gabriel Mountains, Swartout Valley region (in the Swartout Valley region, n side of San Gabriel Mountains) 2072 Comment
  JEPS42584  Phoradendron pauciflorum Frank W. Peirson 1918-8-17 32 Los Angeles San Gabriel Mts., Baldy 2286 Comment
  JEPS42675  Acer macrophyllum Frank W. Peirson 1918-6-17 107 Los Angeles Rock Creek San Gabriel Mts., Rock Creek 1950 Comment
  JEPS42676  Acer macrophyllum Frank W. Peirson 1919-4-5 107 a Los Angeles Old Mt. Wilson trail , Old Mt. Wilson trail (San Gabriel Mountains) 685 Comment
  JEPS42750  Mentzelia micrantha Frank W. Peirson 1921-6-20 2465 Los Angeles San Gabriel Mountains,North Fork San Gabriel River 914 Comment
  JEPS42852  Mentzelia laevicaulis var. laevicaulis F. W. Peirson 1918-6-16 121 Los Angeles San Gabriel Mts., Rock Creek Comment
  JEPS42904  Fremontodendron californicum Frank W. Peirson 1918-6-17 116 Los Angeles Rock Creek. San Gabriel Mts. 1524 Comment
  JEPS42932  Forestiera pubescens Frank W. Peirson 1919-6-13 483 Los Angeles Rock Creek; San Gabriel Mountains 1295 Comment
  JEPS42939  Fraxinus velutina Frank W. Peirson 1921-6-20 2459 Los Angeles West Fork San Gabriel River San Gabriel Mountains 457 Comment
  JEPS43068  Lithophragma bolanderi Frank W. Peirson 1918-5-19 69 Los Angeles just n Altadena (Millard's Canyon, lower slopes of the s face of the San Gabriel Range); lower slopes of s face of San Gabriel Range 609 Comment
  JEPS43117  Anagallis arvensis Frank W. Peirson 1919-3-27 331 Los Angeles foot of Lukens Peak Trail; San Gabriel Mts. 579 Comment
  JEPS43189  Claytonia parviflora subsp. viridis Frank W. Peirson 1923-5-26 3545 Los Angeles n of Rock Creek Divide; San Gabriel Mountains 2133 Comment
  JEPS43691  Clarkia purpurea subsp. quadrivulnera Frank W. Peirson 1919-6-5 467 Los Angeles San Antonio Canyon San Gabriel Mountains 1341 Comment
  JEPS43692  Clarkia xantiana Frank W. Peirson 1923-5-27 3535 Los Angeles Rock Creek San Gabriel Mts. 1295 Comment
  JEPS43807  Saxifraga californica Frank W. Peirson 1919-4-19 373 Los Angeles Pacoima Canyon; San Gabriel Mountains, Pacoima Canyon 533 Comment
  JEPS43895  Mentzelia ravenii Frank W. Peirson 1919-5-10 395 Los Angeles San Gabriel Mountains, Arraster Creek 914 Comment
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Feb 20 2013
  JEPS44012  Epilobium canum subsp. canum Frank W. Peirson 1918-10-15 279 Los Angeles foot of Echo Mt. trail San Gabriel Mts. 548 Comment
  JEPS44040  Epilobium canum subsp. latifolium Frank W. Peirson 1918-6-30 123 Los Angeles Trail from Mt. Lowe to Mt. Wilson. Comment
  JEPS44247  Drymocallis cuneifolia var. ewanii Frank W. Peirson 1919-6-16 493 Los Angeles South Fork Rock Creek San Gabriel Mts., South Fork Rock Creek 1981 Comment
  JEPS44248  Drymocallis cuneifolia var. ewanii Frank W. Peirson 1921-6-18 493 a Los Angeles n slope of Windy Camp San Gabriel Mts., Mt. Islip (Mt. Islip) 2255 Comment
  JEPS44278  Potentilla gracilis var. fastigiata Frank Peirson 1922-7-5 3165 Los Angeles about meadow and down Mescal Creek Big Pines--Swartout Valley Region, Mescal Creek 2072 Comment
  JEPS44509  Horkelia cuneata subsp. puberula Frank W. Peirson 1919-4-5 362 Los Angeles 1/4 mi below the mountains (Borders of Eaton Canyon); San Gabriel Mts., Eaton Canyon 365 Comment
  JEPS44522  Horkelia rydbergii Frank W. Peirson 1923-8-31 4026 Los Angeles San Gabriel Mountains, Big Pines 1859 Comment
  JEPS44525  Horkelia rydbergii Frank W. Peirson 1921-6-15 2448 Los Angeles San Gabriel Mts., Pine Flats stream [Charlton Flat] 1524 Comment
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Jul 29 2016
  JEPS44765  Rubus ursinus Frank W. Peirson 1919-4-19 380 Los Angeles Pacoima Canyon San Gabriel Mts., Pacoima Canyon 609 Comment
  JEPS44779  Adenostoma fasciculatum Frank W. Peirson 1918-6-1 78 Los Angeles Mt. Wilson Toll Rd. 609 Comment
  JEPS44912  Prunus virginiana var. demissa Frank W. Peirson 1919-6-4 82 a Los Angeles Icehouse Canyon; San Gabriel Mountain, Icehouse Canyon 2057 Comment
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Dec 10 2014
  JEPS44949  Prunus emarginata Frank W. Peirson 1919-6-16 492 Los Angeles South Fork Rock Creek 1828 Comment
  JEPS45027  Heteromeles arbutifolia Frank W. Peirson 1918-7 77 Los Angeles Santa Anita Canyon; San Gabriel Mts. 792 Comment
  JEPS45050  Holodiscus discolor Frank W. Peirson 1918-7-13 75 Los Angeles Santa Anita Canyon, San Gabriel Mts. 914 Comment
  JEPS45151  Amelanchier utahensis Frank W. Peirson 1911-1 Los Angeles Lower Rock Creek; San Gabriel Mountains Comment
  JEPS45546  Cercocarpus betuloides var. betuloides Frank W. Peirson 1919-7-1 340 a Los Angeles Fish Canyon; San Gabriel Mountains, Fish Canyon 304 Comment
  JEPS45576  Cercocarpus Frank W. Peirson 1918-5-26 79 Los Angeles Summit of Mount Wilson Comment
  JEPS45732  Datisca glomerata Frank W. Peirson 1918-7-13 122 Los Angeles Santa Anita Canyon; San Gabriel Mountains, Santa Anita Canyon 762 Comment
  JEPS45766  Elatine brachysperma Frank W. Peirson 1921-6-19 2470 Los Angeles Crystal Lake San Gabriel Mtns Comment
  JEPS45921  Carex subfusca Frank W. Peirson 1922-7-5 4265 Los Angeles Big Pines San Gabriel Mts., Big Pines 2072 Comment
  JEPS4627  Collinsia parryi F. W. Peirson 1918-6-1 193 Los Angeles ne Altadena; San Gabriel Mts., Eaton Canyon 914 Comment
  JEPS46376  Centaurium venustum Frank W. Peirson 1918-6-28 144 Los Angeles Lower Rubio Canyon San Gabriel Mts. 579 Comment
  JEPS4641  Collinsia heterophylla F. W. Peirson 1918-6-1 192 Los Angeles Eaton Canyon; San Gabriel Mtns 914 Comment
  JEPS4690  Mimulus johnstonii Frank W. Peirson 1919-6-13 480 Los Angeles San Gabriel Mountains, Rock Creek Rock Creek; San Gabriel Mountains, Rock Creek 1295 Comment
  JEPS4691  Mimulus johnstonii F. W. Peirson 1918-6-30 196 Los Angeles summit Mt. Wilson; San Gabriel Mts. 1737 Comment
  JEPS47108  Cuscuta californica Frank W. Peirson 1918-6-28 150 a Los Angeles e of Rubio Canyon; San Gabriel Mts. 609 Comment
  JEPS47932  Pinus monophylla Frank W. Peirson 1919-6-15 469 Los Angeles Rock Creek San Gabriel Mountains Comment
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Mar 29 2014
  JEPS49134  Ephedra nevadensis Frank W. Peirson 1921-5-19 1527 Los Angeles Little Rock Creek San Gabriel Mountains, Little Rock Creek 944 Comment
  JEPS49281  Ribes amarum Frank W. Peirson 1919-4-5 316 Los Angeles Toll Road San Gabriel Range 1066 Comment
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Dec 10 2014
  JEPS49339  Ribes indecorum Frank W. Peirson 1918-11-1 299 Los Angeles trail to Switzers (Arroyo Seco); San Gabriel Mts. 944 Comment
  JEPS49340  Ribes indecorum Frank W. Peirson 1919-5-21 299 a Los Angeles San Gabriel Mountains, Arroyo Seco, Trail to Switzers Arroyo Seco; San Gabriel Mountains, Arroyo Seco 944 Comment
  JEPS49394  Ribes montigenum Frank W. Peirson 1918-8-16 73 Los Angeles summit Baldy; Mt. San Antonio Comment
  JEPS49398  Ribes montigenum Frank W. Peirson 1920-9-12 685 Los Angeles Summit, a few feet down the n slope Baldy; San Gabriel Range, Mt. San Antinio 3048 Comment
  JEPS49404  Ribes cereum Frank W. Peirson 1918-6-17 256 Los Angeles summit North Baldy; San Antonio Mts. Comment
  JEPS49664  Boykinia rotundifolia Frank W. Peirson 1918-7-13 74 Los Angeles Santa Anita Canyon 975 Comment
  JEPS49815  Apocynum cannabinum Frank W. Peirson 1918-6-18 146 Los Angeles Devils Punch Bowl San Gabriel Mts., Devils Punch Bowl 1219 Comment
  JEPS49874  Asclepias eriocarpa F. W. Peirson 1918-6-28 148 Los Angeles e of Rubio Canyon; San Gabriel Mts. 609 Comment
  JEPS49876  Dudleya lanceolata Frank W. Peirson 1919-7-1 518 Los Angeles Fish Canyon San Gabriel Mtns 304 Comment
  JEPS49901  Dudleya cymosa subsp. pumila Frank W. Peirson 1919-5-10 453 Los Angeles Mount Gleason San Gabriel Mtns 1371 Comment
  JEPS49954  Asclepias fascicularis Frank W. Peirson 1918-8-18 149 Los Angeles San Antonio Canyon; San Gabriel Mts. 1341 Comment
  JEPS50145  Cornus sericea subsp. sericea Frank W. Peirson 1922-7-5 3186 Los Angeles San Gabriel Mts., San Antonio Mts., Swartout Valley Region, 1981 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
  JEPS50292  Viola douglasii Frank W. Peirson 1921-6-15 2447 Los Angeles Trail from Pine Flats to Chilao; San Gabriel Mountains 1676 Comment
  JEPS50471  Viola pedunculata Frank W. Peirson 1919-3-27 332 Los Angeles foot of Lukens Peak Trail; San Gabriel Mountains, Lukens Peak Trail 579 Comment
  JEPS50882  Silene verecunda subsp. platyota Frank W. Peirson 1919-6-14 474 Los Angeles Rock Creek San Gabriel Mountains, Rock Creek 1706 Comment
  JEPS50884  Silene lemmonii Frank Peirson 1918-6-10 39 Los Angeles Mt. Lowe 1371 Comment
  JEPS50922  Silene antirrhina Frank W. Peirson 1919-5-14 421 Los Angeles Eaton Canyon San Gabriel Mountains, Eaton Canyon 731 Comment
  JEPS5093  Asclepias californica Frank W. Peirson 1923-5-26 3541 Los Angeles Rock Creek Divide 2011 Comment
  JEPS51093  Stellaria media Frank W. Peirson 1919-4-19 368 Los Angeles Pacoima Canyon; San Gabriel Mountains 609 Comment
  JEPS51094  Stellaria nitens Frank W. Peirson 1918-5-26 43 Los Angeles Henninger Flats 868 Comment
  JEPS51379  Polycarpon tetraphyllum Frank W. Peirson 1931-5-25 9376 Los Angeles Altadena; 1077 New York Avenue. Comment
  JEPS51534  Meconella denticulata Frank W. Peirson 1918-5-19 36 Los Angeles Millards Canyon San Gabriel Mtns 609 Comment
  JEPS51564  Platystemon californicus Frank W. Peirson 1920-3-28 2103 Los Angeles Tujunga Canyon; San Gabriel Mountains, Tujunga Canyon 457 Comment
  JEPS51657  Canbya candida Frank W. Peirson 1921-5-19 2412 Los Angeles San Gabriel Mountains, Little Rock Creek, North Slope Cajon Pass North Slope Cajon Pass; San Gabriel Mountains, Little Rock Creek 1036 Comment
  JEPS51667  Dendromecon rigida Frank W. Peirson 1919-5-21 408 Los Angeles Arroyo Seco Canyon; San Gabriel Mountains 914 Comment
  JEPS5175  Fritillaria pinetorum Frank W. Peirson 1921-6-18 2454 Los Angeles Mt. Williamson is about 2 mi nw of Islip (San Gabriel Mountains); , Mt. Williamson 2316 Comment
  JEPS51856  Monardella exilis Frank W. Peirson 1921-5-19 2416 Los Angeles Little Rock Creek San Gabriel Mts. 1036 Comment
  JEPS51887  Chamaesyce albomarginata Frank W. Peirson 1919-6-13 459 Los Angeles San Gabriel Mtns, Rock Creek Canyon 1295 Comment
  JEPS51891  Chamaesyce albomarginata F. W. Peirson 1919-6-13 459 Los Angeles Sam Gabriel Mtns, Rock Creek Canyon Comment
  JEPS51907  Euphorbia palmeri Frank W. Peirson 1922-7-6 3184 Los Angeles Big Pines; San Gabriel Mountains 2072 Comment
  JEPS5222  Castilleja applegatei subsp. martinii Frank W. Peirson 1921-7-17 2505 Los Angeles Prairie Fork San Gabriel Mountains, San Gabriel River 2011 Comment
  JEPS52466  Croton californicus Frank W. Peirson 1918-10-16 276 Los Angeles Pacoima Canyon San Gabriel Mts. (at entrance) 457 Comment
  JEPS52562  Calyptridium monandrum Frank W. Peirson 1918-6-4 33 Los Angeles Foothills e of Rubio Canyon 609 Comment
  JEPS5284  Antirrhinum multiflorum Frank W. Peirson 1918-6-30 190 Los Angeles Mt. Wilson Toll Road; San Gabriel Mountains 1143 Comment
  JEPS52980  Berberis aquifolium var. dictyota Frank W. Peirson 1919-5-6 54 Los Angeles Eaton Canyon; San Gabriel Mts 609 Comment
  JEPS53159  Boechera repanda Frank W. Peirson 1919-6-14 507 Los Angeles Rock Creek 1706 Comment
  JEPS53396  Cardamine californica var. integrifolia Frank W. Peirson 1918-5-21 265 a Los Angeles Arroyo Seco San Gabriel Mountains, Arroyo Seco 487 Comment
  JEPS53437  Descurainia pinnata Frank W. Peirson 1919-1-25 309 Los Angeles Arroyo Seco; San Gabriel Mountains 381 Comment
  JEPS53619  Lepidium fremontii Frank W. Peirson 1921-5-19 677 Los Angeles Little Rock Creek San Gabriel Mts. 960 Comment
  JEPS5362  Eriophyllum pringlei F. W. Peirson 1921-5-19 1386 Los Angeles San Gabriel Mts., Little Rock Creek 1036 Comment
  JEPS5376  Eriophyllum wallacei F. W. Peirson 1919-3-30 346 Los Angeles Big Tujunga Canyon San Gabriel Mts., Big Tujunga Canyon 426 Comment
  JEPS53774  Lepidium virginicum Frank W. Peirson 1918-11-2 298 Los Angeles Mt. Wilson Summit San Gabriel Mountains 1767 Comment
  JEPS53908  Stanleya pinnata Frank W. Peirson 1919-6-13 292 Los Angeles Rock Creek San Gabriel Mountains, Rock Creek 1295 Comment
  JEPS54047  Thlaspi arvense Frank W. Peirson 1918-5-26 66 Los Angeles Henninger Flats; San Gabriel Mts., Henninger Flats 868 Comment
  JEPS54161  Thysanocarpus curvipes Frank W. Peirson 1919-3-27 388 Los Angeles hills w Arroyo Seco; San Gabriel Mountains, hills w of Arroyo Seco 426 Comment
  JEPS54208  Thysanocarpus laciniatus Frank W. Peirson 1918-5-19 59 Los Angeles Millards Canyon; San Gabriel Mts., Millards Canyon 609 Comment
  JEPS54295  Amaranthus californicus Frank W. Peirson 1922-7-6 3183 Los Angeles Big Pines San Gabriel Mountains 2072 Comment
  JEPS54534  Astragalus trichopodus var. phoxus Frank W. Peirson 1920-3-28 2099 Los Angeles Tujunga San Gabriel Mts., Tujunga (San Gabriel Mts., on hillside at foot of canyon) 457 Comment
  JEPS54555  Astragalus bicristatus Frank W. Peirson 1921-7-17 2510 Los Angeles San Gabriel River, Prairie Fork 2057 Comment
  JEPS54602  Astragalus douglasii Frank W. Peirson 1919-5-10 397 Los Angeles Arrastre Canyon , Arrastre Canyon (San Gabriel Mts.) 975 Comment
  JEPS54639  Astragalus didymocarpus var. dispermus Frank W. Peirson 1919-5-10 398 Los Angeles Arrastre Canyon San Gabriel Mts., Arrastre Canyon 853 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
  JEPS55202  Paeonia californica Frank W. Peirson 1919-1-25 314 Los Angeles Arroyo Seco San Gabriel Mountains 381 Comment
  JEPS55285  Lathyrus vestitus var. vestitus Frank W. Peirson 1920-5-16 2137 Los Angeles Tujunga Canyon San Gabriel Mountains 472 Comment
  JEPS55286  Lathyrus vestitus var. vestitus Frank W. Peirson 1919-4-19 374 Los Angeles Pacoima Canyon San Gabriel Mountains 609 Comment
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Feb 25 2015
  JEPS55394  Lotus crassifolius F. W. Peirson 1918-6-17 103 Los Angeles Rock Creek San Gabriel Mts. 1524 Comment
  JEPS55411  Lotus argophyllus var. argophyllus Frank W. Peirson 1918-5-26 96 Los Angeles Toll Road up Mt. Wilson 1066 Comment
  JEPS55412  Lotus nevadensis var. davidsonii Frank W. Peirson 1918-6-30 95 Los Angeles San Gabriel Mountains, Summit Mount Wilson Mount Wilson; San Gabriel Mountains, Mount Wilson 1737 Comment
  JEPS55486  Lotus heermannii Frank W. Peirson 1919-7-1 510 Los Angeles Fish Canyon San Gabriel Mountains 457 Comment
  JEPS55487  Lotus heermannii Frank W. Peirson 1918-5-21 99 Los Angeles Arroyo Seco San Gabriel Mountains 487 Comment
  JEPS55500  Lotus micranthus Frank W. Peirson 1919-5-18 436 Los Angeles Monrovia Canyon San Gabriel Mountains 426 Comment
  JEPS55557  Lotus oblongifolius var. oblongifolius Frank W. Peirson 1918-5-21 100 Los Angeles Arroyo Seco San Gabriel Mountains 487 Comment
  JEPS55743  Lotus oblongifolius var. oblongifolius Frank W. Peirson 1919-6-15 501 Los Angeles Rock Creek San Gabriel Mountains 1295 Comment
  JEPS55756  Lotus procumbens var. procumbens Frank W. Peirson 1918-6-18 101 a Los Angeles Lower Rock Creek San Gabriel Mountains Comment
  JEPS55866  Lotus strigosus F. W. Peirson 1918-6-4 97 Los Angeles e of Rubio Canyon; San Gabriel Mts. 609 Comment
  JEPS55921  Lotus salsuginosus F. W. Peirson 1918-6-4 94 Los Angeles hills e Rubio Canyon; San Gabriel Mts. 609 Comment
  JEPS56106  Eriogonum wrightii var. subscaposum Frank W. Peirson 1918-8-17 22 Los Angeles Baldy, Mt. San Antonio San Gabriel Mts., Baldy, Mt. San Antonio 2438 Comment
  JEPS56374  Allium peninsulare var. peninsulare Frank W. Peirson 1919-7-1 509 Los Angeles Fish Canyon San Gabriel Mountains, Fish Canyon 609 Comment
  JEPS56460  Eriogonum pusillum Frank W. Peirson 1921-7-2 4203 Los Angeles Pallett Creek San Gabriel Mts., Pallett Creek Comment
  JEPS56555  Eriogonum plumatella Frank W. Peirson 1923-9-1 4002 Los Angeles Sheep Creek San Gabriel Mountains 1584 Comment
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Dec 11 2014
  JEPS56695  Eriogonum davidsonii Frank W. Peirson 1920-9-12 2278 Los Angeles South Trail, Baldy San Gabriel Mountains, Baldy 2438 Comment
  JEPS56706  Eriogonum davidsonii Frank W. Peirson 1918-6-30 18 Los Angeles summit Mt. Wilson San Gabriel Mts., Mt. Wilson Comment
  JEPS56723  Eriogonum microthecum var. corymbosoides Frank W. Peirson 4003 Los Angeles n to nw slope along uppermost course of Mescal Creek Mescal Creek Comment
  JEPS56881  Eriogonum heermannii var. heermannii Frank W. Peirson 1918-6-18 23 Los Angeles Lower Rock Creek Canyon San Gabriel Mts., Lower Rock Creek Canyon 1219 Comment
  JEPS56929  Eriogonum cithariforme Frank W. Peirson 1921-5-20 2411 Los Angeles Little Rock Creek 975 Comment
  JEPS56939  Eriogonum gracile Frank W. Peirson 1918-11-2 296 Los Angeles Hennigers Flats San Gabriel Mountains Comment
  JEPS57016  Eriogonum elongatum var. elongatum Frank W. Peirson 1918-9-7 19 Los Angeles Toll Road (automobile road up Mt. Wilson) Mt. Wilson Comment
  JEPS57642  Dodecahema leptoceras Frank W. Peirson 1921-6-21 2455 Los Angeles West Fork San Gabriel River San Gabriel Mountains 640 Comment
  JEPS57652  Dodecahema leptoceras Frank W. Peirson 1920-4-26 2113 Los Angeles Santa Anita Wash San Gabriel Mountains 213 Comment
  JEPS57709  Chorizanthe parryi var. parryi Frank W. Peirson 1919-5-21 446 Los Angeles Arroyo Seco San Gabriel Mountains, Arroyo Seco 381 Comment
  JEPS57770  Chorizanthe watsonii Frank W. Peirson 1919-5-10 394 Los Angeles Arraster Creek San Gabriel Mountains, Arraster Creek Comment
  JEPS57815  Centrostegia thurberi var. thurberi Frank W. Peirson 1918-6-16 27 Los Angeles San Gabriel Mountains, Rock Creek Rock Creek; San Gabriel Mountains, Rock Creek 1447 Comment
  JEPS57950  Lastarriaea coriacea Frank W. Peirson 1919-5-21 447 Los Angeles San Gabriel Mountains, Arroyo Seco Arroyo Seco; San Gabriel Mountains, Arroyo Seco 381 Comment
  JEPS57994  Pterostegia drymarioides Frank W. Peirson 1918-5-19 17 Los Angeles Millards Canyon San Gabriel Mts., Millards Canyon Comment
  JEPS58130  Linanthus parviflorus Frank W. Peirson 1919-4-19 377 Los Angeles Pacoima Canyon San Gabriel Mountains 579 Comment
  JEPS58201  Linanthus aureus Frank W. Peirson 1919-3-30 343 Los Angeles Big Tujunga Canyon San Gabriel Mountains 426 Comment
  JEPS5837  Calandrinia breweri Frank W. Peirson 1919-3-27 357 Los Angeles hills w Arroyo Seco; San Gabriel Mountains 426 Comment
  JEPS5839  Calyptridium parryi var. parryi Frank W. Peirson 1922-7-5 3169 Los Angeles Big Pines San Gabriel Mountains 2072 Comment
  JEPS58608  Alnus rhombifolia Frank W. Peirson 1919-1 301 Los Angeles San Gabriel Mountains 579 Comment
  JEPS5908  Bloomeria crocea Frank Peirson 1918-6-28 6 Los Angeles foothills e. of Rubio Canyon; base s. of San Gabriel Mts. Comment
  JEPS59085  Pterospora andromedea Frank W. Peirson 1920-9-13 2272 Los Angeles San Antonio Canyon San Gabriel Mountains 2286 Comment
  JEPS59145  Cirsium occidentale var. californicum Frank W. Peirson 1918-6-1 248 Los Angeles San Gabriel Mts., Eaton Canyon 640 Comment
  JEPS59569  Atriplex rosea Frank W. Peirson 1923-8-30 4009 Los Angeles Lone Pine Canyon San Gabriel Mountains, Lone Pine Cayon, Cyde Ranch (Clyde Ranch) Comment
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Feb 21 2013
  JEPS59717  Chenopodium ambrosioides Frank W. Peirson 1918-10-16 284 Los Angeles Pacoima Canyon 518 Comment
  JEPS60545  Clematis lasiantha Frank W. Peirson 1918-5 51 Los Angeles Millards Canyon 640 Comment
  JEPS60559  Clematis ligusticifolia Frank W. Peirson 1918-8-16 52 Los Angeles San Antonio Canyon 1341 Comment
  JEPS60584  Delphinium patens subsp. hepaticoideum Frank W. Peirson 1918-5-19 50 Los Angeles Millards Canyon 609 Comment
  JEPS60620  Delphinium parishii subsp. parishii Frank W. Peirson 1919-5-10 419 Los Angeles Arraster Creek San Gabriel Mountains 914 Comment
  JEPS60628  Delphinium patens subsp. montanum Frank W. Peirson 1921-7-3 2479 Los Angeles Pinon Ridge San Gabriel Mountains (e end) 2286 Comment
  JEPS60675  Ranunculus cymbalaria var. saximontanus Frank W. Peirson 1919-6-15 486 Los Angeles Rock Creek San Gabriel Mountains 1295 Comment
  JEPS61154  Amsinckia intermedia Frank W. Peirson 1919-4-5 361 Los Angeles Hennigers Flats; San Gabriel Mountains 853 Comment
  JEPS61208  Abronia pogonantha Frank W. Peirson 1921-5-19 2414 Los Angeles San Gabriel Mountains, Little Rock Creek 1036 Comment
  JEPS61408  Geranium carolinianum Frank W. Peirson 1919-5-18 437 Los Angeles Monrovia Canyon San Gabriel Mountains 457 Comment
  JEPS61453  Geranium californicum Frank W. Peirson 1922-7-6 3185 Los Angeles Big Pines San Gabriel Mountains 2072 Comment
  JEPS61485  Allium fimbriatum var. fimbriatum Frank W. Peirson 1919-5-10 425 Los Angeles Arrastre Creek, San Gabriel Mountains Comment
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Jan 1 2017
  JEPS61616  Calochortus albus Frank W. Peirson 1920-6-10 2163 Los Angeles Little Santa Anita Canyon San Gabriel Mountains 1066 Comment
  JEPS61647 Image available Calochortus catalinae Frank W. Peirson 1920-5-16 2146 Los Angeles Tujunga Canyon San Gabriel Mountains Comment
  JEPS61654  Calochortus kennedyi Frank W. Peirson 1921-5-20 1667 Los Angeles about 5 mi back from Mohave Desert; San Gabriel Mts., Little Rock Creek 1127 Comment
  JEPS6170  Collinsia callosa Frank W. Peirson 1921-6-15 2443 Los Angeles Chilao San Gabriel Mountains (from Pine Flats to Islip) 1645 Comment
  JEPS61703  Calochortus invenustus Frank W. Peirson 1922-7-5 3188 Los Angeles n of Big Pines; San Gabriel Mts., Le Montaine 2286 Comment
  JEPS61715  Calochortus splendens Frank W. Peirson 1922-6-4 3089 Los Angeles Soledad Canyon San Gabriel Mountains 457 Comment
  JEPS62047  Lilium parryi Frank W. Peirson 1921-7-17 2515 Los Angeles Prairie Fork, San Gabriel River; San Gabriel Mountains 2133 Comment
  JEPS62190  Veratrum californicum var. californicum Frank W. Peirson 1922-7-6 3190 Los Angeles Big Pine Meadows San Gabriel Mountians 2087 Comment
  JEPS62516  Salazaria mexicana Frank W. Peirson 1919-6-15 498 Los Angeles Rock Creek; San Gabriel Mts., Rock Creek 1341 Comment
  JEPS62525  Salvia apiana F. W. Peirson 1924-6-16 Los Angeles Pasadena Comment
  JEPS62665  Salvia columbariae Frank W. Peirson 1919-3-27 335 Los Angeles hills w Arroyo Seco; San Gabriel Mts. 426 Comment
  JEPS62700  Salvia dorrii Frank W. Peirson 1919-5-11 392 Los Angeles Arraster Canyon; San Gabriel Mts. 838 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
  JEPS62762  Salvia mellifera Frank W. Peirson 1918-6-1 181 Los Angeles Mt. Wilson San Gabriel Mts. (Toll Road) 609 Comment
  JEPS62952  Stachys ajugoides var. rigida Frank W. Peirson 1918-8-16 179 Los Angeles San Antonio Canyon San Gabriel Mts. 1341 Comment
  JEPS62996  Stachys albens Frank W. Peirson 1921-7-1 1046 Los Angeles Soledad Canyon San Gabriel Mts. 441 Comment
  JEPS63  Eriodictyon trichocalyx F. W. Peirson 1918-6-10 169 Los Angeles Mt. Lowe 1584 Comment
  JEPS63015  Stachys bullata F. W. Peirson 1919-5-18 439 Los Angeles Monrovia Canyon San Gabriel Mts. 457 Comment
  JEPS63248  Lepechinia fragrans Frank W. Peirson 1918-6-30 177 Los Angeles San Gabriel Mountains, Mount Wilson, Toll Road Mount Wilson; San Gabriel Mountains, , Toll Road 1066 Comment
  JEPS63313  Monardella cinerea Frank W. Peirson 1918-6-8 182 Los Angeles Baldy (Mt. San Antonio); San Gabriel Mts. 2286 Comment
  JEPS63340  Monardella breweri subsp. lanceolata Frank W. Peirson 1919-7-1 511 Los Angeles Fish Canyon San Gabriel Mts. 304 Comment
  JEPS63874  Juncus textilis Frank W. Peirson 1921-6-20 1640 Los Angeles North Fork San Gabriel River San Gabriel Mountains 762 Comment
  JEPS63880  Juncus mexicanus Frank W. Peirson 1920-9-17 2287 Los Angeles San Antonio Canyon San Gabriel Mountains Comment
  JEPS64192  Dichelostemma capitatum Frank W. Peirson 1918-5-21 7 Los Angeles Arroyo Seco San Gabriel Mts. Comment
  JEPS64281  Sisyrinchium bellum Frank W. Peirson 1919-5-18 444 Los Angeles Monrovia Canyon; San Gabriel Mountains 518 Comment
  JEPS64375  Epipactis gigantea Frank W. Peirson 1918-7-8 13 Los Angeles San Antonio Canyon San Gabriel Mountains 1828 Comment
  JEPS64479  Piperia cooperi Frank W. Peirson 1919-5-14 449 Los Angeles Eaton Canyon San Gabriel Mountains 609 Comment
  JEPS64529  Populus fremontii subsp. fremontii Frank W. Peirson 1919-3-30 386 Los Angeles Big Tujunga Canyon; San Gabriel Mountains, Big Tujunga Canyon 441 Comment
  JEPS64569  Populus trichocarpa Frank W. Peirson 1919-2 318 Los Angeles San Gabriel Mountains 457 Comment
  JEPS64999  Lupinus bicolor Frank W. Peirson 1919-5-10 413 Los Angeles Arraster Canyon San Gabriel Mts., Arraster Canyon 838 Comment
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Aug 21 2014
  JEPS65041  Lupinus breweri Frank W. Peirson 1921-6-16 2441 Los Angeles near summit Mt. Waterman; San Gabriel Mts., nr summit Mt. Waterman 2316 Comment
  JEPS65121  Lupinus elatus Frank W. Peirson 1921-6-16 2438 Los Angeles Waterman Ridge; San Gabriel Mts., Waterman Ridge 2286 Comment
  JEPS65122  Lupinus hyacinthinus Frank W. Peirson 1918-6-10 88 Los Angeles Summit San Gabriel Peak San Gabriel Peak Comment
  JEPS65123  Lupinus elatus Frank W. Peirson 1918-6-10 89 Los Angeles Summit of San Gabriel Peak San Gabriel Peak Comment
  JEPS65128  Lupinus excubitus var. austromontanus Frank W. Peirson 1919-6-14 522 Los Angeles Rock Creek San Gabriel Mts., Rock Creek 1981 Comment
  JEPS65131  Lupinus excubitus var. hallii F. W. Peirson 1922-6-4 3090 Los Angeles San Gabriel Mountain, Soledad Canyon Soledad Canyon; San Gabriel Mountain, Soledad Canyon 685 Comment
  JEPS65255  Lupinus hirsutissimus Frank W. Peirson 1918-6-4 86 Los Angeles foothills e Rubio Canyon; San Gabriel Mts., e of Rubio Canyon 609 Comment
  JEPS65273  Lupinus latifolius var. parishii Frank W. Peirson 1919-6-5 464 Los Angeles San Antonio Canyon; San Gabriel Mts., San Antonio Canyon 1341 Comment
  JEPS65299  Lupinus longifolius F. W. Peirson 1920-5-14 2147 Los Angeles Lukens Peak; San Gabriel Mts. 914 Comment
  JEPS65548  Melilotus albus Frank W. Peirson 1919-3-30 354 Los Angeles Tujunga Canyon San Gabriel Mountains 426 Comment
  JEPS65634  Hoita orbicularis Frank W. Peirson 1921-7-1 2474 Los Angeles Arraster Creek San Gabriel Mountains 944 Comment
  JEPS65701  Trifolium albopurpureum var. albopurpureum Frank W. Peirson 1920-5-24 2154 Los Angeles San Antonio Canyon San Gabriel Mtns 1341 Comment
  JEPS65971  Trifolium microcephalum Frank W. Peirson 1919-4-19 379 Los Angeles Pacoima Canyon San Gabriel Mtns 685 Comment
  JEPS6598  Galium aparine F. W. Peirson 1921-6-19 1184 Los Angeles North Fork San Gabriel River San Gabriel Mts. 1005 Comment
  JEPS66089  Trifolium wormskioldii Frank W. Peirson 1919-6-15 485 Los Angeles Rock Creek 1295 Comment
  JEPS66275  Rhus trilobata Frank W. Peirson 1919-5-10 418 Los Angeles Arraster Creek; San Gabriel Mountains, Arraster Creek 914 Comment
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Aug 21 2014
  JEPS66276  Rhus trilobata Frank W. Peirson 1919-3 342 Los Angeles Monrovia Canyon, Arroyo Seco Monrovia Canyon; San Gabriel Mountains 426 Comment
  JEPS66573  Arbutus menziesii Frank W. Peirson 1918-7-13 140 Los Angeles Santa Anita Canyon; San Gabriel Mountains, Santa Anita Canyon 914 Comment
  JEPS66727  Garrya flavescens Frank W. Peirson 1918-6-16 138 Los Angeles Rock Creek San Gabriel Mts. (n side of San Gabriel Mts.) 1447 Comment
  JEPS66754  Garrya veatchii Frank W. Peirson 1918-5-27 139 Los Angeles n of Claremont; San Gabriel Mts., San Antonio Canyon 1371 Comment
  JEPS67032  Juncus macrophyllus Frank W. Peirson 1920-9-17 2288 Los Angeles San Antonio Canyon San Gabriel Mountains Comment
  JEPS67037  Juncus nevadensis Frank W. Peirson 1922-7-7 3174 Los Angeles Ranger's Cabin San Gabriel Mountains, Swartout Valley 1798 Comment
  JEPS673  Rhamnus tomentella subsp. cuspidata F. W. Peirson 1918-6-16 110 Los Angeles Rock Creek San Gabriel Mts. 1447 Comment
  JEPS67517  Cryptantha circumscissa Frank W. Peirson 1918-6-30 174 Los Angeles Summit Mt. Wilson Mt. Wilson 1752 Comment
  JEPS67675  Cryptantha intermedia Frank W. Peirson 1919-5-10 402 Los Angeles Arraster Creek San Gabriel Mountains 914 Comment
  JEPS67721  Cryptantha muricata Frank W. Peirson 1921-7-1 2476 Los Angeles Arraster Creek San Gabriel Mountains 944 Comment
  JEPS68011  Plagiobothrys collinus Frank W. Peirson 1921-6-15 997 Los Angeles Pine Flats to Chilao; San Gabriel Mountains 1676 Comment
  JEPS69007  Eriastrum densifolium Frank W. Peirson 1919-6-18 482 Los Angeles Rock Creek San Gabriel Mountains 1295 Comment
  JEPS69109  Eriastrum sapphirinum Frank W. Peirson 1918-6-28 156 Los Angeles foothills e Rubio Canyon; San Gabriel Mts. 609 Comment
  JEPS69139  Loeseliastrum matthewsii Frank W. Peirson 1921-5-19 952 Los Angeles Little Rock Creek San Gabriel Mts., Little Rock Creek 1036 Comment
  JEPS69357  Allophyllum divaricatum Frank W. Peirson 1918-6-1 153 Los Angeles cross trail into Eaton Canyon; San Gabriel Mts. 990 Comment
  JEPS69442  Gilia angelensis Frank W. Peirson 1919-5-14 424 Los Angeles Eaton Canyon San Gabriel Mountains, Eaton Canyon 762 Comment
  JEPS69537  Gilia capitata subsp. abrotanifolia Frank W. Peirson 1919-4-19 384 Los Angeles Pacoima Canyon San Gabriel Mountains, Pacoima Canyon 670 Comment
  JEPS69584  Gilia diegensis Frank W. Peirson 1919-4-19 385 Los Angeles Pacoima Canyon San Gabriel Mountains, Pacoima Canyon 548 Comment
  JEPS69712  Gilia splendens subsp. splendens Frank W. Peirson 1921-7-3 2485 Los Angeles trail ne Rock Creek divide; San Gabriel Mountains, ne of Rock Creek divide 2133 Comment
  JEPS69713  Gilia splendens subsp. splendens Frank W. Peirson 1918-10-21 286 Los Angeles West Fork San Gabriel River 1219 Comment
  JEPS7023  Galium grande F. W. Peirson 1919-5-18 448 Los Angeles ridge between Monrovia Canyon and Fish Canyon; San Gabriel Mts. 990 Comment
  JEPS7049  Collinsia torreyi var. wrightii Frank W. Peirson 1922-7-5 3156 Los Angeles Big Pines; San Gabriel Mtns 2103 Comment
  JEPS71118  Phlox gracilis Frank W. Peirson 1921-7-3 2484 Los Angeles e end Pinyon Ridge; San Gabriel Mountains 2286 Comment
  JEPS73669  Monardella exilis Frank W. Peirson 1921-5-19 2416 Los Angeles Little Rock Creek San Gabriel Mts. 1036 Comment
  JEPS7558  Penstemon heterophyllus var. australis F. W. Peirson 1918-6-10 202 Los Angeles Mt. Lowe San Gabriel Mts., Mt. Lowe 762 Comment
  JEPS75649  Dendromecon rigida Frank W. Peirson 1919-5-21 408 Los Angeles Arroyo Seco Canyon; San Gabriel Mountains 914 Comment
  JEPS75653  Platystemon californicus Frank W. Peirson 1920-3-28 2103 Los Angeles Tujunga Canyon; San Gabriel Mountains, Tujunga Canyon 457 Comment
  JEPS78507  Nemacladus longiflorus var. longiflorus Frank W. Peirson 1921-6-21 2453 Los Angeles San Gabriel Mountains, West Fork of San Gabriel River 640 Comment
  JEPS78508  Nemacladus ramosissimus Frank W. Peirson 1918-6-4 220 Los Angeles foothills e. of Rubio Canyon; San Gabriel Mountains 609 Comment
  JEPS78510  Nemacladus pinnatifidus Frank W. Peirson 1918-6-12 219 Los Angeles foothills e Rubio Canyon; San Gabriel Mountains 609 Comment
  JEPS7856  Galium angustifolium subsp. angustifolium F. W. Peirson 1918-6-28 213 Los Angeles foothills e Rubio Canyon; San Gabriel Mts. 609 Comment
  JEPS79790  Mimulus johnstonii Frank W. Peirson 1919-6-13 480 Los Angeles San Gabriel Mountains, Rock Creek Rock Creek; San Gabriel Mountains, Rock Creek 1295 Comment
  JEPS79971  Rosa woodsii var. ultramontana Frank W. Peirson 1919-6-14 470 Los Angeles Big Rock Creek Canyon; San Gabriel Mts. 1676 Comment
  JEPS85719  Penstemon spectabilis var. subviscosus Frank W. Peirson 1924-6-16 Los Angeles near Pasadena (foothills of the San Gabriel Mountains); San Gabriel Mountains Comment
  JEPS8725  Keckiella antirrhinoides Frank Peirson 1925-6-16 Los Angeles Pasadena Comment
  JEPS8766  Castilleja foliolosa Frank W. Peirson 1919-5-10 430 Los Angeles Arraster Creek San Gabriel Mountains 914 Comment
  JEPS8767  Castilleja foliolosa Frank W. Peirson 1918-5-19 208 Los Angeles Echo Mt. San Gabriel Mountains 762 Comment
  JEPS8827  Castilleja linariifolia Frank W. Peirson 1921-7-2 2478 Los Angeles Pallett Creek; San Gabriel Mountains 1097 Comment
  JEPS8876  Chaenactis fremontii Frank W. Peirson 1921-5-19 2409 Los Angeles near its opening into the Mojave Desert Little Rock Creek (n base of San Gabriel Mountains); Mojave Desert, San Gabriel Mountains, Little Rock Creek 960 Comment
  JEPS8878  Chaenactis santolinoides Frank W. Peirson 1918-6-10 241 Los Angeles region just to the s of Red Box Gap (at the summit of San Gabriel Peak); San Gabriel Mountains, San Gabriel Peak 1874 Comment
  JEPS8904  Chaenactis artemisiifolia Frank W. Peirson 1918-6-28 242 Los Angeles foothills e of Rubio Canyon; San Gabriel Mountains 609 Comment
  JEPS908  Tauschia arguta F. W. Peirson 1918-5-19 134 Los Angeles Echo Mt.; San Gabriel Mts., Echo Mt. 609 Comment
  JEPS9161  Acourtia microcephala Frank W. Peirson 1919-7-1 520 Los Angeles Fish Canyon; San Gabriel Mountains 457 Comment
  JEPS9442  Galium hallii Frank W. Peirson 1923-9-1 4013 Los Angeles in small canyon back of old sawmill (w end of valley); Swartout Valley Comment
  JEPS9470  Galium angustifolium subsp. gabrielense Frank W. Peirson 1919-6-7 7677 Los Angeles Cow Canyon Divide San Gabriel Mts. 1371 Comment
  JEPS9477  Galium parishii F. W. Peirson 1920-9-12 2280 Los Angeles Summit Baldy San Gabriel Mts. 3072 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
  JEPS9776  Castilleja miniata Frank W. Peirson 1919-6-14 490 Los Angeles Big Rock Creek; San Gabriel Mountains 1524 Comment
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Jan 31 2008
  JEPS9868  Mimulus brevipes F. W. Peirson 1918-5-19 195 Los Angeles Echo Mountain San Gabriel Mountains 685 Comment
  JEPS9911  Lasthenia coronaria Frank W. Peirson 1919-3-27 330 Los Angeles Arroyo Seco Canyon San Gabriel Mountains, Arroyo Seco Canyon 411 Comment
  PASA1014  Collinsia callosa Frank W. Peirson 1922-6-3 Los Angeles East of Oak Grove Canyon Divide, Liebre Mts. 1173 Comment
  PASA1039  Veronica arvensis Frank W. Peirson 1919-4-25 Los Angeles 1077 New York Avenue, Altadena Comment
  PASA1139  Monardella cinerea Frank W. Peirson 1920-9-12 Los Angeles San Antonio Peak 2819 Comment
  PASA1219  Cercocarpus betuloides Frank W. Peirson 1927-3-19 Los Angeles Seminole Hot Springs Region, Santa Monica Mts. Comment
  PASA1576  Syntrichopappus lemmonii Frank W. Peirson 1926-5-8 Los Angeles Road from Rock Creek to L. A. County Playground 1310 Comment
  PASA1605  Meconella oregana var. denticulata Frank W. Peirson 1925-4-23 Los Angeles San Gabriel River 365 Comment
  PASA1701  Solidago confinis Frank W. Peirson 1920-9-12 Los Angeles Bear Flat, trail to Mt. San Antonio 1706 Comment
  PASA1703  Solidago occidentalis Frank W. Peirson 1921-9-21 Los Angeles Los Angeles River near Tropico Comment
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Nov 12 2014
  PASA1791  Chrysopsis villosa var. fastigiata Frank W. Peirson 1921-10-9 Los Angeles Tujunga Canyon 914 Comment
  PASA1815  Corethrogyne filaginifolia Frank W. Peirson 1919-10-26 Los Angeles Foot of Rubio Canyon, Altadena 548 Comment
  PASA1978  Cryptantha circumscissa Mabel B. Peirson 1933-5-13 Los Angeles Lovejoy Buttes Comment
  PASA2040  Lepidium fremontii Frank W. Peirson 1921-5-19 Los Angeles Little Rock Creek, San Gabriel Mts. 960 Comment
  PASA2105  Nama rothrockii Frank W. Peirson 1930-7-7 Los Angeles Arrastre Flat, San Bernardino Mts. 2285 Comment
  PASA2162  Brickellia californica Frank W. Peirson 1924-10-26 Los Angeles Arroyo Seco 198 Comment
  PASA2196  Chaenactis santolinoides Frank W. Peirson 1928-6-2 Los Angeles South Fork Rock Creek, San Gabriel Mts. 1981 Comment
  PASA2198  Chaenactis stevioides Frank W. Peirson 1923-5-25 Los Angeles Rock Creek, San Gabriel Mts. 1295 Comment
  PASA2210  Eriophyllum confertiflorum Frank W. Peirson 1923-9-1 Los Angeles West end of Swartout Valley near the old Saw Mill 2011 Comment
  PASA2230  Heuchera elegans Frank W. Peirson 1922-5-30 Los Angeles West spur of Mt. Lowe 1341 Comment
  PASA2243  Ribes aureum var. gracillimum Frank W. Peirson 1921-3-6 Los Angeles Foothill Boulevard, 1 mile east on Monrovia Comment
  PASA2254  Ribes indecorum Frank W. Peirson 1920-12-30 Los Angeles San Gabriel Wash at Foothill Boulevard 137 Comment
  PASA2301  Hemizonia clementina Frank W. Peirson 1923-4-9 Los Angeles Southeastward from Wilsons Cove, San Clemente Island Comment
  PASA238  Trifolium microcephalum Frank W. Peirson 1919-5-18 Los Angeles Monrovia Canyon, San Gabriel Mts. 457 Comment
  PASA2396  Clematis lasiantha Frank W. Peirson 1926-3-20 Los Angeles Arroyo Seco, San Gabriel Mts. 914 Comment
  PASA262  Vicia americana Frank W. Peirson 1921-4-10 Los Angeles San Dimas Canyon, San Gabriel Mts. 426 Comment
  PASA2796  Fritillaria pinetorum F. W. Peirson 1921-7-18 Los Angeles San Gabriel Mtns., Mt. Williamson 2316 Comment
  PASA284  Symphoricarpos albus var. mollis Frank W. Peirson 1919-5-18 Los Angeles Monrovia Canyon 761 Comment
  PASA357  Thelypodium lasiophyllum Frank W. Peirson 1919-5-14 Los Angeles Eaton Canyon, San Gabriel Mts. 761 Comment
  PASA386  Barbarea vulgaris Frank W. Peirson 1922-7-5 Los Angeles Big Pines Camp, San Gabriel Mts. 2072 Comment
  PASA445  Canbya candida Frank W. Peirson 1926-4-26 Los Angeles 6 miles west of Rock Creek (old road). Mohave desert Comment
  PASA472  Salvia carnosa subsp. pilosa Frank W. Peirson 1929-6-15 Los Angeles Rock Creek, San Gabriel Mts. 1295 Comment
  PASA625  Juncus balticus Frank W. Peirson 1922-6-4 Los Angeles Soledad Canyon 457 Comment
  PASA911  Agoseris retrorsa Frank W. Peirson 1922-7-6 Los Angeles Blue Ridge, San Gabriel Mts. 2316 Comment
  PASA991  Castilleja plagiotoma Frank W. Peirson 1921-7-3 Los Angeles Blue Ridge, San Gabriel Mts. 2285 Comment
  POM128775  Clarkia xantiana subsp. parviflora F. W. Peirson 1927-5-21 7300 Los Angeles Rock Creek, north base of San Gabriel Mountains. 1524 Comment
  POM13528  Collinsia bartsiifolia var. davidsonii F. W. Peirson 1922-6-3 s.n. Los Angeles West of Elizabeth Lake. 1174 Comment
  POM13538  Lithophragma bolanderi F. W. Peirson 1922-6-3 s.n. Los Angeles At Collins Ranch, north slope of Liebre Mts. 1143 Comment
  POM160274  Malacothamnus marrubioides F. W. Peirson 1929-7-1 s.n. Los Angeles Aliso Creek, San Gabriel Mts. 1098 Comment
  POM162487  Arenaria macradenia var. arcuifolia F. W. Peirson 1929-7-1 8430 Los Angeles Aliso Creek at Tie Canyon. 1356 Comment
  POM171941  Lupinus peirsonii F. W. Peirson 1930-5-30 8904 Los Angeles North slope of Rock Creek 1372 Comment
  POM175471  Solanum umbelliferum F. W. Peirson 1919-6-15 1082 Los Angeles Rock Creek, north slope of San Gabriel Mountains. 1296 Comment
  POM175480  Rhamnus tomentella subsp. cuspidata F. W. Peirson 1919-6-15 727 Los Angeles Rock Creek, north slope of San Gabriel Mountains. 1296 Comment
  POM17754  Nemacladus sigmoideus F. W. Peirson 1921-5-19 s.n. Los Angeles Little Rock Creek: north base of San Gabriel Mountains. 1037 Comment
  POM35148  Horkelia rydbergii F. W. Peirson 1921-6-16 2448 Los Angeles Pine Flats. 1524 Comment
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Jul 29 2016
  POM358609  Galinsoga parviflora var. parviflora F. W. Peirson 1931-4-11 9375 Los Angeles 1077 New York Avenue, Altadena. Comment
  POM47663  Lithophragma tenellum F. W. Peirson 1921-6-16 4690 Los Angeles Summit of Mt. Waterman, San Gabriel Mountains 2317 Comment
  POM48465  Nitrophila occidentalis F. W. Peirson 1924-10-19 5229 Los Angeles Clearwater. Comment
  POM48474  Baccharis salicifolia F. W. Peirson 1924-12-3 5384 Los Angeles San Gabriel Wash at Foothill Boulevard, Azusa. Comment
  POM71664  Castilleja plagiotoma F. W. Peirson 1921-7-3 2727 Los Angeles Blue Ridge, south of Swartout Valley 2287 Comment
  POM75440  Camissonia pallida subsp. pallida F. W. Peirson 1928-6-3 7951 Los Angeles roadside, N slope of Pinyon Ridge, betw Rock Creek and Big Pines, San Gabriel Mts. 1372 Comment
  POM8239  Hoffmannseggia glauca F. W. Peirson 1922-8-15 s.n. Los Angeles Coyote Pass, Los Angeles. Comment
  POM86818A  Amelanchier utahensis F. W. Peirson 1919-6-14 471 -A Los Angeles Rock Creek Divide, north side of San Gabriel Mountains. 2012 Comment
  POM89885  Ceanothus oliganthus var. oliganthus F. W. Peirson 1926-3-20 6513 Los Angeles Arroyo Seco. 1006 Comment
  POM9733  Equisetum laevigatum F. W. Peirson 1920-4-25 s.n. Los Angeles Arroyo Seco, Pasadena 411 Comment
  POM9734  Equisetum telmateia var. braunii F. W. Peirson 1920-4-25 s.n. Los Angeles Arroyo Seco, Pasadena 411 Comment
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Sep 26 2014
  POM9745  Galium angustifolium subsp. gabrielense F. W. Peirson 1919-6-7 7677 Los Angeles Cow Canyon divide, San Antonio Creek Region 1372 Comment
  RSA0070771  Pentagramma triangularis F. W. Peirson 1923-4-10 3440 Los Angeles North slope canyon about 10 miles southeast of Wilson's Cove, San Clemente Island. Comment
  RSA0083644  Sedum spathulifolium F. W. Peirson 1921-6-21 2472 Los Angeles West Fork of San Gabriel River. 686 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
  RSA100195  Lonicera interrupta F. W. Peirson 1918-6-30 218 Los Angeles Mt. Wilson Road, south face of San Gabriel Mountains 1158 Comment
  RSA100222  Lonicera interrupta F. W. Peirson 1919-6-14 4504 Los Angeles Rock Creek, north slopes of San Gabriel Mts. 1295 Comment
  RSA114700  Cornus sericea subsp. sericea F. W. Peirson 1922-7-5 3186 Los Angeles Mescal Creek, Swartout Valley region, westward from Big Pines 1981 Comment
  RSA182015  Arctostaphylos glandulosa subsp. mollis F. W. Peirson 1918-5-19 142 Los Angeles Echo Mountain;, 2 mi. n of Altadena 1037 Comment
  RSA296869  Mentzelia laevicaulis F. W. Peirson 1918-6-16 121 Los Angeles San Gabriel Mts. Rock Creek 1448 Comment
  RSA298501  Ranunculus cymbalaria var. saximontanus F. W. Peirson 1919-6-15 486 Los Angeles Rock Creek, north slope of San Gabriel Mountains. 1296 Comment
  RSA33252  Ericameria cuneata var. cuneata F. W. Peirson 1924-12-5 5381 Los Angeles San Gabriel Peak at head of Eaton Canyon 1646 Comment
  RSA37103  Agrostis exarata F. W. Peirson 1920-9-17 2289 Los Angeles San Antonio Canyon, San Gabriel Mountains. 1341 Comment
  RSA417661  Aster greatae F. W. Peirson 1924-8-23 5053 Los Angeles W fork San Gabriel River, just above forks Comment
  RSA427421  Solanum umbelliferum F. W. Peirson 1921-2-26 2792 Los Angeles Topanga Canyon Road, west end of San Gabriel Mts. Near summit of ridge, north slope 457 Comment
  RSA428320A  Thysanocarpus laciniatus F. W. Peirson 1919-4-19 5334 Los Angeles Pacoima Canyon 548 Comment
  RSA435910  Berberis nevinii F. W. Peirson 1921-3-3 s.n. Los Angeles Near stream, Arroyo Seco 335 Comment
  RSA442865  Sphaeralcea emoryi subsp. variabilis F. W. Peirson 1921-5-18 s.n. Los Angeles Palmdale, Antelope Valley. Comment
  RSA464930  Fraxinus velutina F. W. Peirson 1924-8-23 s.n. Los Angeles W fork San Gabriel River, just above forks Comment
  RSA523591  Plantago patagonica F. W. Peirson 1921-5-20 2410 Los Angeles Little Rock Creek 960 Comment
  RSA64584  Eriogonum pusillum F. W. Peirson 1921-5-19 2406 Los Angeles Little Rock Creek: N slope of San Gabriel Mountains 960 Comment
  RSA64885  Oxytheca parishii var. parishii F. W. Peirson 1951-1 1782 Los Angeles Mt. Wilson, San Gabriel Mts Comment
  RSA64887  Oxytheca parishii var. parishii F. W. Peirson 1922-7-5 3168 Los Angeles Summit of Le Montaine, north of Big Pines, north side of San Gabriel Mountains 2210 Comment
  RSA65035  Silene parishii F. W. Peirson 1918-9-7 38 Los Angeles trail from San Gabriel Peak to Mt. Wilson 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
  RSA65064  Silene verecunda subsp. platyota F. W. Peirson 1920-9-15 2284 Los Angeles Mt. San Antonio, north slope 2819 Comment
  RSA65079  Eriogonum giganteum var. formosum F. W. Peirson 1923-4-10 3450 Los Angeles 5 mi. SE of Wilson Cove. Canyon about 5 mi. southeast of Eagle Ranch, San Clemente Island. Comment
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May 16 2008
  RSA65089  Eriogonum hirtiflorum F. W. Peirson 1921-6-15 2452 Los Angeles Trail from Pine Flats to Chilao. 1677 Comment
  RSA65149  Eriogonum fasciculatum var. foliolosum F. W. Peirson 1919-7-3 513 Los Angeles San Gabriel Mountains: Lukens Peak 915 Comment
  RSA65151  Eriogonum fasciculatum var. foliolosum F. W. Peirson 1919-1-26 305 Los Angeles San Gabriel Mountains: Rubio Reservoir, foot of Rubio Canyon 549 Comment
  RSA65161  Dodecahema leptoceras F. W. Peirson 1925-4-19 5776 Los Angeles On Upper Boulevard, just E of Pacoima Bridge, SW base of San Gabriel Mts. Comment
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Sep 9 2015
  RSA65162  Dodecahema leptoceras F. W. Peirson 1920-4-26 2113 Los Angeles Santa Anita Wash, S base of San Gabriel Mts. 213 Comment
  RSA65163  Dodecahema leptoceras F. W. Peirson 1921-6-21 2455 Los Angeles West Fork of San Gabriel River, San Gabriel Mts. 640 Comment
  RSA65167  Chorizanthe parryi var. parryi F. W. Peirson 1920-5-12 2131 Los Angeles Foothill Blvd. San Gabriel Wash, S base of San Gabriel Mts. 183 Comment
  RSA65170  Chorizanthe parryi var. fernandina F. W. Peirson 1920-5-3 2120 Los Angeles Little Tujunga Wash just above the junction with Big Tujunga, SW base of San Gabriel Mountains 335 Comment
  RSA65202  Mucronea californica F. W. Peirson 1951-1 1778 Los Angeles Rubio Wash, Altadena Comment
  RSA65213  Eriogonum heermannii var. heermannii F. W. Peirson 1918-6-18 23 Los Angeles Rock Creek, north base of San Gabriel Mountains. 1250 Comment
  RSA65222  Eriogonum angulosum F. W. Peirson 1921-11-11 4202 Los Angeles Elizabeth Lake. Comment
  RSA65266  Chorizanthe staticoides F. W. Peirson 1918-6-15 26 Los Angeles Lower part of Mint Canyon, n.w. base of San Gabriel Mts. 457 Comment
  RSA65268  Chorizanthe staticoides F. W. Peirson 1921-5-20 5342 Los Angeles Little Rock Creek 1067 Comment
  RSA65354  Atriplex serenana F. W. Peirson 1817 Los Angeles Near Kewen Lake, Pasadena Comment
  RSA65361  Atriplex canescens F. W. Peirson 1921-11-11 2598 Los Angeles Lower Bouquet Canyon. Comment
  RSA65370  Pterostegia drymarioides F. W. Peirson 17 Los Angeles Devils Gate, Arroyo Seco, Pasadena Comment
  RSA65373  Atriplex serenana F. W. Peirson 1920-6-22 1818 Los Angeles Bassett, near El Monte. Comment
  RSA65385  Atriplex pacifica F. W. Peirson 1923-4-11 3461 Los Angeles In canyon below farm buildings at Eagle Ranch, San Clemente Island Comment
  RSA65434  Calandrinia breweri F. W. Peirson 1918-5-4 1859 Los Angeles Summit of Santa Monica Range, above Brents on the Malibu Comment
  RSA65435  Calandrinia breweri F. W. Peirson 1919-5-27 357 Los Angeles Hills west of lower Arroyo Seco, Pasadena 426 Comment
  RSA65442  Lewisia rediviva F. W. Peirson 1921-6-16 4686 Los Angeles along stream north of Mt. Waterman, San Gabriel Mountains 1860 Comment
  RSA65453  Rumex hymenosepalus F. W. Peirson 1919-3-6 1803 Los Angeles New York Ave, Altadena. Comment
  RSA65474  Rumex salicifolius var. salicifolius F. W. Peirson 1919-6-14 29 Los Angeles Rock Creek, north slopes of San Gabriel Mts. 1296 Comment
  RSA65500  Arenaria macradenia var. arcuifolia F. W. Peirson 1929-7-1 8430 Los Angeles Aliso Creek at Tie Canyon. 1356 Comment
  RSA65501  Arenaria macradenia var. arcuifolia F. W. Peirson 1922-7-5 3157 Los Angeles Summit of Le Montaine, north of Big Pines, north side of San Gabriel Mountains 2209 Comment
  RSA65507  Minuartia douglasii F. W. Peirson 1919-4-19 367 Los Angeles Pacoima Canyon 548 Comment
  RSA65558  Polycarpon depressum F. W. Peirson 1918-6-4 46 Los Angeles Burned area in Hlls east of Rubio Canyon Comment
  RSA65560  Polycarpon tetraphyllum F. W. Peirson 1931-5-25 9376 Los Angeles At 1077 New York Ave. Altadena. Comment
  RSA65565  Spergularia platensis F. W. Peirson 1944-8-19 s.n. Los Angeles at 1085 New York Avenue, Altadena Comment
  RSA65581  Spergularia platensis F. W. Peirson 1866 Los Angeles Long Beach Comment
  RSA65638  Vaccaria hispanica F. W. Peirson 1908-1 1864 Los Angeles 1077 New York Ave, Altadena. Comment
  RSA65792  Lepidium virginicum var. virginicum F. W. Peirson 1918-11-2 298 Los Angeles summit of Mt. Wilson Comment
  RSA65821  Descurainia pinnata subsp. menziesii F. W. Peirson 1918-03 1900 Los Angeles At Altadena. Comment
  RSA65847  Eriogonum microtheca var. corymbosoides F. W. Peirson 1923-8-30 s.n. Los Angeles Upper end of Mescal Creek, Le Montaine, north side of San Gabriel Mountains. 2226 Comment
  RSA65891  Centrostegia thurberi F. W. Peirson 1919-5-10 28 Los Angeles Arraster [Arrastre] Creek. North base of San Gabriel Mountains. 915 Comment
  RSA65980  Eriogonum roseum F. W. Peirson 1921-11-11 2719 Los Angeles Elizabeth Lake. Comment
  RSA65994  Eriogonum umbellatum var. munzii F. W. Peirson 1923-8-30 4684 Los Angeles Le Montaine: north of Big Pines; norh side of San Gabriel Mountains 2287 Comment
  RSA66031  Eriogonum gracile var. gracile F. W. Peirson 1923-10-7 4164 Los Angeles Railroad station at Newhall. Comment
  RSA66070  Barbarea orthoceras F. W. Peirson 1922-7-5 3166 Los Angeles Big Pines Meadow, north side of San Gabriel Mountains 2072 Comment
  RSA66080  Brassica rapa F. W. Peirson 1919-1-26 306 Los Angeles Hills east of Rubio Canyon 548 Comment
  RSA66082  Sinapis arvensis F. W. Peirson 1919-4-5 1898 Los Angeles New York Ave. Altadena 351 Comment
  RSA66107  Cardamine californica var. integrifolia F. W. Peirson s.n. Los Angeles Santa Monica Canyon, Santa Monica Mts. Comment
  RSA66226  Boechera arcuata F. W. Peirson 1919-6-14 662 Los Angeles Rock Creek, north slope of San Gabriel Mountains 1707 Comment
  RSA66242  Platystemon californicus F. W. Peirson 1920-3-28 2103 Los Angeles North slope of low hills at foot of Tujunga Canyon, w. end of San Gabriel Mountains. 457 Comment
  RSA66268  Eschscholzia californica var. peninsularis F. W. Peirson 1930-5-12 8789 Los Angeles Open desert along boulevard nearly opposite Acton, about 3 miles north of Mint Canyon summit. Comment
  RSA66270  Eschscholzia californica var. peninsularis F. W. Peirson 1921-4-21 319 Los Angeles Trail below Sycamore Flat, on way to San Dimas, San Gabriel Mountains. 793 Comment
  RSA66272  Eschscholzia ramosa F. W. Peirson 1923-4-11 3469 Los Angeles San Clemente Island, bluff above sea a little way NW of Eagle Ranch Comment
  RSA66285  Dendromecon rigida F. W. Peirson 1919-5-10 408 Los Angeles Arraster [Arrastre] Creek. North base of San Gabriel Mountains. 915 Comment
  RSA66294  Canbya candida F. W. Peirson 1921-5-19 2412 Los Angeles Little Rock Creek: north base of San Gabriel Mountains. 1037 Comment
  RSA66299  Stylomecon heterophylla F. W. Peirson 1918-5-5 1889 Los Angeles along road to [Brents] on the Malibu, Santa Monica Mts. Comment
  RSA66304  Papaver californicum F. W. Peirson 1921-4-10 2397 Los Angeles Trail from San Dimas to Sycamore Flat, San Gabriel Mountains. 534 Comment
  RSA66342  Eriogonum brachyanthum F. W. Peirson 1921-5-19 2656 Los Angeles Little Rock Creek: north base of San Gabriel Mountains 976 Comment
  RSA66344  Eriogonum brachyanthum F. W. Peirson 1921-7-2 1744 Los Angeles Pallett Creek, San Gabriel Mountains. 1098 Comment
  RSA66536  Capsella bursa-pastoris F. W. Peirson 1920-4-20 2106 Los Angeles 1085 New York Drive, Altadena. Comment
  RSA66539  Caulanthus major F. W. Peirson 1922-7-5 4179 Los Angeles Le Montaine, peak north of Big Pines. 2134 Comment
  RSA66555  Draba corrugata var. corrugata F. W. Peirson 1920-9-12 4184 Los Angeles Summit of Baldy (Mt. San Antonio) 3049 Comment
  RSA66735  Eschscholzia caespitosa subsp. caespitosa F. W. Peirson 1951-1 1888 Los Angeles Arroyo Seco, near Switzer's Trail, south slope of San Gabriel Mts. Comment
  RSA66742  Eschscholzia minutiflora F. W. Peirson 1919-6-15 487 Los Angeles Rock Creek, north slope of San Gabriel Mountains. 1296 Comment
  RSA66765  Meconella denticulata F. W. Peirson 1920-3-28 36 Los Angeles Tujunga Canyon: small side canyon in lower Tujunga. 488 Comment
  RSA66814  Stanleya pinnata var. pinnata F. W. Peirson 1918-6-16 292 Los Angeles Rock Creek, north slope of San Gabriel Mountains 1448 Comment
  RSA66841  Caulanthus heterophyllus var. heterophyllus F. W. Peirson 1918-6-6 63 Los Angeles East of Rubio Canyon Comment
  RSA67119  Galium hallii F. W. Peirson 1923-9-1 4013 Los Angeles In small sawmill canyon at west end of Swartout Valley at 6600 feet. 2012 Comment
  RSA67120  Galium hallii F. W. Peirson 1918-6-17 214 Los Angeles Rock Creek, northern base of San Gabriel Mountains. 1677 Comment
  RSA67137  Galium trifidum F. W. Peirson 1908-5-22 2655 Los Angeles Bixby Ranch near Long Beach. Comment
  RSA67139  Galium parishii F. W. Peirson 1920-9-12 2280 Los Angeles Summit of 'Baldy' (Mt. San Antonio) 3049 Comment
  RSA67145  Galium parishii F. W. Peirson 1922-7-5 3158 Los Angeles North of Big Pines, sometimes called La Montaine, San Gabriel Mountains 2256 Comment
  RSA67146  Galium grande F. W. Peirson 1919-5-18 448 Los Angeles Ridge between Monrovia and Fish Canyons 1067 Comment
  RSA67350  Lepidium nitidum F. W. Peirson 1921-2-26 2814 Los Angeles Topango Canyon, Santa Monica Mts. 305 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
  RSA67367  Guillenia lasiophylla F. W. Peirson 1919-3-27 327 Los Angeles Foot of trail to Lukens Peak 609 Comment
  RSA68337  Polygonum aviculare subsp. aviculare F. W. Peirson 1951-1 1796 Los Angeles 1077 New York Ave., Altadena Comment
  RSA68637  Calochortus plummerae Frank W. Peirson 1921-6-20 2666 Los Angeles North Fork of San Gabriel River 762 Comment
  RSA68645  Calochortus invenustus Frank W. Peirson 1918-6-17 9 Los Angeles Head of Rock Creek 1982 Comment
  RSA68650  Calochortus kennedyi var. kennedyi Frank W. Peirson 1923-5-26 4099 Los Angeles Rock Creek, north slope of San Gabriel Mts., 1524 Comment
  RSA68664  Zigadenus fremontii Frank W. Peirson 1918-5-5 1687 Los Angeles Brents on the Malibu, Santa Monica Mountains. Comment
  RSA68669  Calochortus albus Frank W. Peirson 1920-6-10 2163 Los Angeles Little Santa Anita Canyon, San Gabriel Mountains 1067 Comment
  RSA68671  Calochortus catalinae Frank W. Peirson 1920-5-16 2146 Los Angeles Tujunga Canyon, west end of San Gabriel Mountains. 457 Comment
  RSA68673  Calochortus clavatus var. gracilis Frank W. Peirson 1921-6-21 2468 Los Angeles West Fork of San Gabriel River. 686 Comment
  RSA68709  Lilium parryi Frank W. Peirson 1921-7-17 2515 Los Angeles Prairie Fork of San Gabriel River, San Gabriel Mountains. 2134 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
  RSA68730  Fritillaria biflora Frank W. Peirson 1921-4-10 1675 Los Angeles Trail below Sycamore Flat on way to San Dimas 792 Comment
  RSA68752  Limonium californicum F. W. Peirson 850 Los Angeles Long Beach. Comment
  RSA68760  Delphinium patens subsp. hepaticoideum F. W. Peirson 632 Los Angeles Laurel Canyon, Santa Monica Mts. Comment
  RSA68964  Plantago patagonica F. W. Peirson 1920-5-3 1183 Los Angeles Little Tujunga Wash, west end of San Gabriel Mts. 335 Comment
  RSA68978  Plantago hirtella var. galeottiana F. W. Peirson 1179 Los Angeles Near Kewen Lake, Pasadena Comment
  RSA69308  Pyrola picta F. W. Peirson 1921-7-17 2512 Los Angeles Prairie Fork of San Gabriel River, San Gabriel Mountains. 2134 Comment
  RSA69327  Veratrum californicum var. californicum Frank W. Peirson 1922-7-6 3190 Los Angeles Big Pines Meadow, Swartout Valley Region, San Gabriel Mountains. 2088 Comment
  RSA69394  Thalictrum fendleri var. fendleri F. W. Peirson 1921-7-17 4688 Los Angeles Prairie Fork of San Gabriel River, San Gabriel Mountains. 2012 Comment
  RSA69441  Frasera neglecta F. W. Peirson 1921-6-15 2670 Los Angeles Pine flats stream, north slope 1494 Comment
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Feb 25 2015
  RSA69443  Frasera neglecta F. W. Peirson 1918-6-17 145 Los Angeles Rock Creek 1524 Comment
  RSA69459  Mirabilis laevis var. villosa F. W. Peirson 1930-7-30 9043 Los Angeles Big Rock Creek. 1372 Comment
  RSA69532  Maianthemum stellatum Frank W. Peirson 1921-7-17 2349 Los Angeles Prairie Fork of San Gabriel River, San Gabriel Mountains. 2134 Comment
  RSA69570  Arbutus menziesii F. W. Peirson 1919-4-5 140 Los Angeles Old Trail to Mt. Wilson, San Gabriel Mts. 762 Comment
  RSA69664  Juncus macrophyllus F. W. Peirson 1920-9-17 2288 Los Angeles San Antonio Canyon, San Gabriel Mountains. 1341 Comment
  RSA69671  Juncus bufonius var. bufonius F. W. Peirson 1921-5-20 5354 Los Angeles Little Rock Creek 960 Comment
  RSA69698  Mentzelia congesta F. W. Peirson 1923-5-25 3523 Los Angeles along stream on south side of canyon of Rock Creek, San Gabriel Mountains. 1296 Comment
  RSA69706  Mentzelia congesta F. W. Peirson 1919-6-14 472 Los Angeles Rock Creek, north slope of San Gabriel Mountains 1707 Comment
  RSA69719  Mentzelia dispersa F. W. Peirson 1921-6-16 2799 Los Angeles north slope of Mt. Waterman, San Gabriel Mts. 2210 Comment
  RSA69720  Mentzelia montana F. W. Peirson 1921-6-16 2799 -a Los Angeles north slope of Mt. Waterman, San Gabriel Mts. 2210 Comment
  RSA69859  Juncus textilis F. W. Peirson 1921-6-20 1640 Los Angeles North Fork of San Gabriel River 762 Comment
  RSA69880  Forestiera pubescens F. W. Peirson 1921-5-20 4728 Los Angeles Little Rock Creek 1067 Comment
  RSA69889  Fraxinus dipetala F. W. Peirson 1919-4-19 383 Los Angeles Pacoima Canyon; San Gabriel Mountains Comment
  RSA69897  Fraxinus velutina F. W. Peirson 1922-6-3 3081 Los Angeles 3 miles west of Elizabeth Lake. 1113 Comment
  RSA69912  Asclepias vestita F. W. Peirson 1928-6-3 7950 Los Angeles roadside, N slope of Pinyon Ridge, betw Rock Creek and Big Pines, San Gabriel Mts. 1372 Comment
  RSA69948  Grayia spinosa F. W. Peirson 1917-5-13 1832 Los Angeles Roadside near village of Little Rock, north side of San Gabriel Mountains. Comment
  RSA69953  Krascheninnikovia lanata F. W. Peirson 1926-4-26 6653 Los Angeles about 1 mile east of Palmdale Comment
  RSA70008  Amaranthus californicus F. W. Peirson 1922-7-6 3183 Los Angeles Along Mescal Creek, near Big Pines, north slope of San Gabriel Mts. 2073 Comment
  RSA70014  Amaranthus albus F. W. Peirson 1921-3-6 1841 Los Angeles San Gabriel Wash. 213 Comment
  RSA70023  Suaeda taxifolia F. W. Peirson 1918-08 1829 Los Angeles Long Beach Comment
  RSA70071  Platanthera sparsiflora Frank W. Peirson 1921-7-17 4283 Los Angeles Prairie Fork of San Gabriel River, San Gabriel Mountains. 2134 Comment
  RSA70073  Piperia cooperi Frank W. Peirson 1919-5-18 449 Los Angeles Monrovia Canyon, San Gabriel Mountains 381 Comment
  RSA70081  Platanthera sparsiflora Frank W. Peirson 1919-6-15 505 Los Angeles Rock Creek, north slope of San Gabriel Mountains. 1296 Comment
  RSA70137  Triteleia clementina F. W. Peirson 1923-4-9 3472 Los Angeles San Clemente Island: canyon running to Middle Ranch Comment
  RSA70144  Triteleia dudleyi F. W. Peirson 1921-6-16 2458 Los Angeles along stream north of Mt. Waterman, San Gabriel Mountains 1860 Comment
  RSA70171  Allium monticola F. W. Peirson 1918-6-17 267 Los Angeles Rock Creek Divide Comment
  RSA70178  Allium fimbriatum var. fimbriatum F. W. Peirson 1919-5-10 425 Los Angeles Arrastre, San Gabriel Mountains 854 Comment
  RSA70188  Yucca whipplei var. whipplei Frank W. Peirson 1920-4-26 461 Los Angeles Santa Anita Wash above Foothill Blvd. 213 Comment
  RSA70220  Allium haematochiton F. W. Peirson 1921-4-21 2401 Los Angeles Trail below Sycamore Flat, on way to San Dimas, San Gabriel Mountains. Alt. 2600 ft. 793 Comment
  RSA70244  Allium peninsulare var. peninsulare F. W. Peirson 1919-7-1 509 Los Angeles Fish Canyon, San Gabriel Mountains 610 Comment
  RSA70261  Juncus macrandrus F. W. Peirson 1922-7-6 3180 Los Angeles Big Pines Meadow, Swartout Valley Region, San Gabriel Mountains. 2088 Comment
  RSA70269  Juncus phaeocephalus F. W. Peirson 1918-4-28 488 Los Angeles Road east and south of El Monte. Comment
  RSA70285  Juncus mexicanus F. W. Peirson 1920-9-17 2287 Los Angeles San Antonio Canyon, San Gabriel Mountains. 1341 Comment
  RSA70286  Juncus mexicanus F. W. Peirson 1921-5-20 5352 Los Angeles Little Rock Creek, N slope of San Gabriel Mts 1037 Comment
  RSA70294  Juncus duranii F. W. Peirson 1921-7-17 2844 Los Angeles Prairie Fork of San Gabriel River, San Gabriel Mountains. 2134 Comment
  RSA70353  Funastrum cynanchoides var. hartwegii F. W. Peirson 889 Los Angeles near bridge southeast of Monrovia. 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
  RSA70396  Chamaesyce serpillifolia F. W. Peirson 2039 Los Angeles Laurel Canyon, Santa Monica Mts. Comment
  RSA70398  Chamaesyce serpillifolia F. W. Peirson 1920-6-14 2162 Los Angeles At Peirson home, 1082 New York Drive, Altadena Comment
  RSA70414  Arctostaphylos parryana F. W. Peirson 1942-10-15 13434 Los Angeles hillt top at Charlton Flats Comment
  RSA70415  Arctostaphylos parryana F. W. Peirson 1922-7-6 3196 Los Angeles hills immediately south of divide, Big Pines, north side of San Gabriel Mountains 2104 Comment
  RSA70417  Arctostaphylos parryana F. W. Peirson 1919-5-10 429 Los Angeles Mt. Gleason trail from Arrastre Creek, San Gabriel Mountains. 1738 Comment
  RSA70454  Allium burlewii F. W. Peirson 1924-5-27 4628 Los Angeles North slope of Strawberry Peak, San Gabriel Mountains. 1677 Comment
  RSA70455  Allium burlewii F. W. Peirson 1918-6-17 4 Los Angeles Summit of North Baldy, San Gabriel Mts. 2820 Comment
  RSA70459  Allium monticola F. W. Peirson 1921-6-16 5223 Los Angeles north slope of Mt. Waterman 2133 Comment
  RSA70467  Allium lacunosum var. davisiae F. W. Peirson 1919-5-11 426 Los Angeles Arraster Creek, north slope of San Gabriel Mts. 853 Comment
  RSA70471  Allium lacunosum var. davisiae F. W. Peirson 1932-4-17 9851 Los Angeles Below Lovejoy Dam, Lovejoy Buttes, southwestern Mojave Desert. 762 Comment
  RSA70491  Erodium cicutarium F. W. Peirson 1919-2-28 2022 Los Angeles At Frank Peirson residence, 1085 New York Drive, Altadena Comment
  RSA70493  Erodium moschatum F. W. Peirson 1919-2-28 2023 Los Angeles At Frank Peirson residence, 1085 New York Drive, Altadena Comment
  RSA70496  Erodium macrophyllum F. W. Peirson 1918-5-5 2024 Los Angeles along road to [Brents] on the Malibu, Santa Monica Mts. Comment
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Jun 21 2018
  RSA70498  Geranium californicum F. W. Peirson 1922-7-6 3185 Los Angeles Swartout Valley region. Big Pines, north side of San Gabriel Mtns. 2073 Comment
  RSA70520  Calochortus striatus Mabel Peirson 1934-5-19 11156 Los Angeles Love Joy Dam Comment
  RSA70550  Chamaesyce albomarginata F. W. Peirson 1919-6-13 459 Los Angeles Rock Creek. 1296 Comment
  RSA70560  Croton californicus F. W. Peirson 1918-10-17 276 Los Angeles foot of Pacoima Canyon 457 Comment
  RSA70576  Sarcodes sanguinea F. W. Peirson 1923-5-26 3444 Los Angeles Vincent Gulch. 1982 Comment
  RSA70872  Arctostaphylos glauca F. W. Peirson 1919-1-29 315 Los Angeles Inspiration Point, Mt. Lowe 1372 Comment
  RSA70873  Arctostaphylos glauca Mabel Peirson 1925-2-14 5433 Los Angeles Arroyo Seco, not far above the stadium, Pasadena Comment
  RSA70874  Arctostaphylos glauca F. W. Peirson 1924-12-5 5383 Los Angeles Little Santa Anita Canyon 915 Comment
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Dec 30 2007
  RSA70900  Arctostaphylos glandulosa subsp. cushingiana F. W. Peirson 1918-5-26 141 Los Angeles summit of Mt. Wilson 1738 Comment
  RSA71096  Calystegia peirsonii F. W. Peirson 1927-5-21 7301 Los Angeles Rock Creek, north base of San Gabriel Mountains. 1524 Comment
  RSA71107  Calystegia macrostegia subsp. amplissima F. W. Peirson 1923-4-9 3483 Los Angeles San Clemente Island: 2 miles SE of Wilson's Cove Comment
  RSA71122  Calystegia occidentalis subsp. fulcrata F. W. Peirson 1923-5-21 3516 Los Angeles Fish Canyon 914 Comment
  RSA71825  Saltugilia splendens subsp. splendens F. W. Peirson 1923-5-25 3533 Los Angeles lower part of south bank of Rock Creek Canyon, San Gabriel Mts. 1296 Comment
  RSA71839  Gilia leptantha subsp. transversa F. W. Peirson 1921-5-20 4132 Los Angeles Little Rock Creek: north base of San Gabriel Mountains. 1006 Comment
  RSA71840  Gilia latiflora subsp. latiflora F. W. Peirson 1921-5-19 2832 Los Angeles Little Rock Creek: north base of San Gabriel Mountains. 1037 Comment
  RSA71858  Allophyllum divaricatum F. W. Peirson 1923-5-21 3515 Los Angeles Fish Canyon, San Bernardino Mountains 686 Comment
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Jun 18 2018
  RSA71865  Allophyllum glutinosum F. W. Peirson 1951-3-28 153 Los Angeles Benedict's Canyon, Santa Monica Mts. Comment
  RSA71890  Saltugilia splendens subsp. splendens F. W. Peirson 1918-10-16 s.n. Los Angeles Pacoima Canyon, west end of San Gabriel Mts. 534 Comment
  RSA72084  Phlox gracilis F. W. Peirson s.n. Los Angeles Devil's Gate, Arroyo Seco Comment
  RSA72089  Epilobium canum subsp. latifolium F. W. Peirson 1920-9-13 2282 Los Angeles San Gabriel Mts., San Antonio Canyon. 2134 Comment
  RSA72098  Epilobium canum subsp. latifolium F. W. Peirson 1923-9-1 4027 Los Angeles San Gabriel Mts. Saw Mill Canyon at west end of Swartout Valley. 2012 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
  RSA72103  Epilobium canum subsp. canum F. W. Peirson 1918-10-15 279 Los Angeles Foot of Echo Mountain Trail to Mount Lowe and San Gabriel Range. 549 Comment
  RSA72136  Epilobium angustifolium subsp. circumvagum F. W. Peirson 1921-7-17 2506 Los Angeles Prairie Fork of San Gabriel River, San Gabriel Mountains. 2134 Comment
  RSA72148  Gayophytum decipiens F. W. Peirson 1919-6-14 796 Los Angeles San Gabriel Mts., Rock Creek. 1707 Comment
  RSA72175  Epilobium ciliatum subsp. ciliatum F. W. Peirson 1951-08 s.n. Los Angeles Kewen Lake, Pasadena 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
  RSA72195  Oenothera californica subsp. californica F. W. Peirson 1923-5-27 4513 Los Angeles Pallett Creek, north slope of San Gabriel Mountains 1098 Comment
  RSA72198  Oenothera californica subsp. californica F. W. Peirson 1921-5-19 2408 Los Angeles Little Rock Creek, San Gabriel Mts. 1037 Comment
  RSA72206  Camissonia bistorta F. W. Peirson 1918-5-26 129 Los Angeles San Gabriel Mountains, Henni[n]gers Flat Comment
  RSA72217  Clarkia heterandra F. W. Peirson 1922-6-3 3083 Los Angeles At Collins Ranch, north slope of Liebre Mts. 1143 Comment
  RSA72258  Camissonia cheiranthifolia subsp. suffruticosa F. W. Peirson 1921-2-26 2579 Los Angeles Beach 1 mile east of Topango [Topanga]. Comment
  RSA72283  Gilia nevinii F. W. Peirson 1923-4-9 3433 Los Angeles San Clemente Island: Wilson's Cove. Comment
  RSA72291  Gilia angelensis F. W. Peirson 1919-5-14 424 Los Angeles Eaton Canyon. 685 Comment
  RSA72333  Epilobium canum subsp. canum F. W. Peirson 1916-8-31 758 Los Angeles Ridge road about 2 miles north of Sandberg's, Liebre Mts. 1143 Comment
  RSA72334  Epilobium canum subsp. canum F. W. Peirson 1907-7-1 755 Los Angeles Catalina Island. Comment
  RSA72340  Epilobium canum subsp. latifolium F. W. Peirson 1920-9-15 4114 Los Angeles Mountain north of Baldy, San Gabriel Range 2820 Comment
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Jan 20 2015
  RSA72645  Wyethia ovata F. W. Peirson 1921-6-14 1326 Los Angeles San Gabriel Mountains. Pine Flats, headwaters of Tujunga Creek. 1676 Comment
  RSA73009  Linanthus concinnus F. W. Peirson 1928-6-2 7931 Los Angeles S fork of Rock Creek: trail toward the summit. 1982 Comment
  RSA73023  Linanthus parryae F. W. Peirson 1921-5-20 940 Los Angeles Mojave Desert, Little Rock Creek, San Gabriel Mountains 1067 Comment
  RSA73031  Leptosiphon breviculus F. W. Peirson 1921-6-18 4710 Los Angeles divide north of Mt. Islip 2042 Comment
  RSA73041  Linanthus bigelovii F. W. Peirson 1921-5-20 2791 Los Angeles Little Rock Creek, San Gabriel Mts. 976 Comment
  RSA73058  Leptosiphon ciliatus F. W. Peirson 1920-6-10 2790 Los Angeles San Gabriel Mts., summit of Mt. Wilson 1738 Comment
  RSA73061  Leptosiphon ciliatus F. W. Peirson 1907-7-9 455 Los Angeles West Pine Flats at head of Tujunga Canyon. Comment
  RSA73076  Leptosiphon liniflorus F. W. Peirson 1922-6-3 3077 Los Angeles North of Collins Ranch, Oakgrove Canyon, Liebre Mts. 1006 Comment
  RSA73084  Linanthus dichotomus F. W. Peirson 1926-4-27 6666 Los Angeles San Gabriel Mountains. North side of San Gabriel Mountains, Rock Creek. 1296 Comment
  RSA73116  Navarretia fossalis F. W. Peirson 1906-7-19 950 Los Angeles Sink near Inglewood. Comment
  RSA73149  Navarretia prostrata F. W. Peirson 1906-7-19 951 Los Angeles Sink near Inglewood. Comment
  RSA73289  Linanthus californicus F. W. Peirson 1919-5-10 401 Los Angeles Mt.Gleason 1372 Comment
Read comments
Aug 21 2014
  RSA73290  Linanthus californicus F. W. Peirson 1918-5-4 158 Los Angeles Summit of Santa Monica Range, above Brents on the Malibu Comment
  RSA73300  Clarkia dudleyana F. W. Peirson 1905-5-28 442 Los Angeles Rubio Wash, south of San Gabriel Mts. Comment
  RSA73307  Clarkia bottae F. W. Peirson 1919-5-18 432 Los Angeles San Gabriel Mtns. Monrovia Canyon. 305 Comment
  RSA73318  Clarkia cylindrica subsp. cylindrica F. W. Peirson 1930-5-12 4113 Los Angeles North slope along road above Bouquet Canyon. 1067 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
  RSA73341  Clarkia dudleyana F. W. Peirson 1920-6-10 4456 Los Angeles North slope of Echo Mtn. 915 Comment
  RSA73342  Clarkia dudleyana F. W. Peirson 1919-6-7 466 Los Angeles Cow Canyon divide, San Antonio Creek Region 1372 Comment
  RSA73344  Clarkia xantiana subsp. parviflora F. W. Peirson 1923-5-27 3535 Los Angeles small canyon on Pinyon Ridge, Rock Creek, north slope of San Gabriel Mountains 1296 Comment
  RSA73349  Clarkia xantiana subsp. parviflora F. W. Peirson 1919-6-5 5307 Los Angeles San Antonio Canyon, along stream bed above bridge. 1448 Comment
  RSA73356  Clarkia rhomboidea F. W. Peirson 1922-6-3 3087 Los Angeles At Collins Ranch, north slope of Liebre Mts. 1143 Comment
  RSA73363  Clarkia unguiculata F. W. Peirson 1920-5-16 2086 Los Angeles Tujunga Canyon, west end of San Gabriel Mountains. 457 Comment
  RSA74161  Phacelia cicutaria var. hubbyi F. W. Peirson 1920-3-28 2100 Los Angeles North slope of low hills at foot of Tujunga Canyon, w. end of San Gabriel Mountains. 457 Comment
  RSA74179  Phacelia cryptantha F. W. Peirson 1923-5-25 3529 Los Angeles Rock Creek, north slope of San Gabriel Mountains 1296 Comment
  RSA74500  Phacelia minor F. W. Peirson 1918-1 162 Los Angeles burned area east of Rubio Canyon Comment
  RSA74507  Phacelia mohavensis F. W. Peirson 1922-7-5 3154 Los Angeles Mescal Creek, Swartout Valley region, westward from Big Pines 1982 Comment
  RSA74508  Phacelia mohavensis F. W. Peirson 1921-6-15 962 Los Angeles Trail from Pine Flats to Chilao. 1677 Comment
  RSA74724  Nama demissa var. demissa F. W. Peirson 1921-5-19 2415 Los Angeles Little Rock Creek: north base of San Gabriel Mountains. 1037 Comment
  RSA74727  Phacelia davidsonii F. W. Peirson 1908-4-20 968 Los Angeles Mt Wilson. 1738 Comment
  RSA74780  Phacelia ramosissima var. latifolia F. W. Peirson 1929-6-30 8424 Los Angeles Aliso Creek at Tie Canyon. 1357 Comment
  RSA74812  Turricula parryi F. W. Peirson 1929-6-30 8429 Los Angeles Aliso Creek at Tie Canyon. 1357 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
  RSA74920  Phacelia imbricata subsp. imbricata F. W. Peirson 1929-6-30 8767 Los Angeles Tie Canyon, tributary of Aliso Creek. 1433 Comment
  RSA74921  Phacelia egena F. W. Peirson 1930-5-30 8903 Los Angeles North slope of Rock Creek 1372 Comment
  RSA74923  Phacelia imbricata subsp. patula F. W. Peirson 1921-6-16 2451 Los Angeles Summit of Mt. Waterman Ridge 2287 Comment
  RSA74926  Phacelia egena F. W. Peirson 1927-5-21 7298 Los Angeles Rock Creek, north base of San Gabriel Mountains. 1524 Comment
  RSA74928  Phacelia egena F. W. Peirson 1942-5-15 13463 Los Angeles Rock Creek. 1296 Comment
  RSA74937  Phacelia davidsonii F. W. Peirson 1921-6-14 2826 Los Angeles San Gabriel Mountains. Pine Flats, headwaters of Tujunga Creek. 1677 Comment
  RSA74939  Phacelia davidsonii F. W. Peirson 1929-7-1 8444 Los Angeles Mt. Pacifico: upper part of trail, San Gabriel Mountains. 1982 Comment
  RSA74948  Phacelia distans F. W. Peirson 1921-5-20 4714 Los Angeles Little Rock Creek: north base of San Gabriel Mountains. 1006 Comment
  RSA75121  Nemacladus ramosissimus F. W. Peirson 1918-6-4 220 Los Angeles Burned area in Hlls east of Rubio Canyon Comment
  RSA75129  Nemacladus pinnatifidus F. W. Peirson 1918-6-12 219 Los Angeles In area recently burned over, in hills east of Rubio Canyon, San Gabriel Mts. 548 Comment
  RSA75351  Phacelia fremontii F. W. Peirson 1927-5-21 163 Los Angeles Rock Creek, north base of San Gabriel Mountains. 1524 Comment
  RSA75352  Phacelia fremontii F. W. Peirson 1922-6-3 4478 Los Angeles East of Oak Grove Creek Divide, Liebre Mts. 1174 Comment
  RSA75379  Ludwigia peploides subsp. peploides F. W. Peirson 1916-09 2080 Los Angeles Kewen Lake, Pasadena Comment
  RSA75382  Camissonia strigulosa F. W. Peirson 1919-5-10 405 Los Angeles Arraster [Arrastre] Creek. North base of San Gabriel Mountains. 915 Comment
  RSA75397  Camissonia boothii subsp. decorticans F. W. Peirson 1928-6-2 7949 Los Angeles San Gabriel Mountains, wash in Rock Creek. 1372 Comment
  RSA75411  Oenothera elata subsp. hirsutissima F. W. Peirson 1920-9-17 780 Los Angeles San Antonio Canyon, San Gabriel Mountains. 1341 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
  RSA75447  Camissonia hirtella F. W. Peirson 1919-6-14 478 Los Angeles Rock Creek [Big?] 1524 Comment
  RSA75518  Phacelia fremontii F. W. Peirson 1929-6-30 8423 Los Angeles Aliso Creek at Tie Canyon. 1357 Comment
  RSA75683  Camissonia boothii subsp. decorticans F. W. Peirson 1919-6-14 479 Los Angeles Rock Creek [Big?] 1524 Comment
  RSA75689  Camissonia campestris subsp. campestris F. W. Peirson 1921-5-20 793 Los Angeles Mojave Desert, Little Rock Creek, San Gabriel Mountains 1067 Comment
  RSA75690  Camissonia campestris subsp. campestris F. W. Peirson 1917-5-13 4515 Los Angeles Near Little Rock, Mojave Desert. Comment
  RSA75933  Phacelia longipes F. W. Peirson 1927-5-21 3618 Los Angeles near falls in Fish canyon 610 Comment
  RSA75935  Phacelia longipes F. W. Peirson 1927-5-21 7229 Los Angeles Rock Creek, north base of San Gabriel Mountains. 1524 Comment
  RSA75940  Phacelia lyonii F. W. Peirson 1907-7-1 4120 Los Angeles Catalina Island. Comment
  RSA75987  Eucrypta chrysanthemifolia var. chrysanthemifolia F. W. Peirson 1921-6-20 5303 Los Angeles North Fork of San Gabriel River 762 Comment
  RSA76025  Pholistoma racemosum F. W. Peirson 1923-4-8 3452 Los Angeles Wilson s Cove, San Clemente Island. Comment
  RSA76940  Rhus trilobata F. W. Peirson 1919-5-10 418 Los Angeles Arraster [Arrastre] Creek. North base of San Gabriel Mountains 915 Comment
  RSA76947  Malosma laurina F. W. Peirson 1920-7-13 105 Los Angeles along wash land by Rubio Canyon stream; Altadena Comment
  RSA76949  Rhus ovata F. W. Peirson 1920-5-1 106 Los Angeles South slope of the San Gabriel Mountains, Eaton Canyon. 609 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
  RSA76987  Acer macrophyllum F. W. Peirson 1919-4-5 107 Los Angeles Sierra Madre trail to Mt. Lowe. Comment
  RSA77030  Malacothamnus davidsonii F. W. Peirson 1928-9-4 8180 Los Angeles Paicoma Wash at Upper Boulevard, San Fernando Valley Comment
  RSA77034  Malacothamnus fremontii F. W. Peirson 1917-5-13 68 Los Angeles Roadside near village of Little Rock, north side of San Gabriel Mountains. Comment
  RSA77040  Malacothamnus fremontii F. W. Peirson 1929-6-30 8428 Los Angeles Aliso Creek at Tie Canyon. 1357 Comment
  RSA77048  Sphaeralcea emoryi subsp. variabilis F. W. Peirson 1917-5-13 776 Los Angeles Palmdale, SW Mojave Desert. Comment
  RSA77095  Lyonothamnus floribundus subsp. aspleniifolius F. W. Peirson 1923-4-10 3454 Los Angeles North slope canyon about 10 miles southeast of Wilson's Cove, San Clemente Island. Comment
Read comments
Jan 12 2015
  RSA77143  Ceanothus crassifolius F. W. Peirson 1926-3-20 6514 Los Angeles Arroyo Seco, near Pasadena 915 Comment
  RSA77145  Ceanothus crassifolius F. W. Peirson 1919-1-19 302 Los Angeles Rubio Canyon, San Gabriel Mountains. 549 Comment
  RSA77167  Toxicodendron diversilobum F. W. Peirson 1919-4-5 325 Los Angeles Foot of Eaton Canyon, south face of San Gabriel Mts. Comment
  RSA77171  Rhus integrifolia F. W. Peirson 1919-1-25 313 Los Angeles Arroyo Seco, near Pasadena 381 Comment
  RSA77173  Rhus integrifolia F. W. Peirson 1926-4-26 6646 Los Angeles Pocoima Wash, San Fernando Valley. Comment
  RSA77203  Malacothamnus clementinus F. W. Peirson 1923-4-9 3458 Los Angeles San Clemente Island: canyon near Lemon Tank at Middle ranch Comment
  RSA77220  Fremontodendron californicum subsp. californicum F. W. Peirson 1921-5-20 773 Los Angeles Little Rock Creek 1067 Comment
  RSA77229  Eriodictyon trichocalyx var. trichocalyx F. W. Peirson 1918-6-10 169 Los Angeles west slope of San Gabriel Peak 1677 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
  RSA77252  Nama californica F. W. Peirson 1921-6-14 2421 Los Angeles Tujunga Canyon, west end of San Gabriel Mountains. 1250 Comment
  RSA77255  Emmenanthe penduliflora var. penduliflora F. W. Peirson 1925-4-23 5799 Los Angeles Forks of San Gabriel River. 534 Comment
  RSA77354  Ceanothus cuneatus var. cuneatus F. W. Peirson 1925-3-18 5471 Los Angeles Upper part of Mint Canyon, north base of San Gabriel Mts. Comment
  RSA77488  Ceanothus spinosus F. W. Peirson 1921-2-26 733 Los Angeles Topanga Canyon Road, west end of San Gabriel Mts. Near summit of ridge, north slope 457 Comment
  RSA77637  Marah macrocarpa F. W. Peirson 1921-2-26 4507 Los Angeles Topango Canyon Divide. 488 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
  RSA77722  Viola purpurea subsp. mohavensis F. W. Peirson 1921-6-15 2491 Los Angeles Trail from Pine Flats to Chilao. 1677 Comment
  RSA77746  Viola pedunculata F. W. Peirson 1919-3-27 332 Los Angeles Foot of trail to Lukens Peak 610 Comment
  RSA77837  Tribulus terrestris F. W. Peirson 1918-10-1 5310 Los Angeles Vacant lot on New York Ave. Altadena. Comment
  RSA78648  Solanum umbelliferum F. W. Peirson 1943-5-15 13550 Los Angeles Rock Creek, north slope of San Gabriel Mountains. 1296 Comment
  RSA79452  Scrophularia villosa F. W. Peirson 1907-7-1 s.n. Los Angeles Catalina Island. Comment
  RSA79455  Scrophularia californica F. W. Peirson 1911-04 191 Los Angeles Laurel Canyon. Comment
  RSA79567  Cryptantha intermedia F. W. Peirson 1919-5-11 402 Los Angeles Arraster Creek, San Gabriel Mountains 915 Comment
  RSA79595  Cryptantha circumscissa F. W. Peirson 1908-6-3 174 Los Angeles summit of Mt. Wilson Comment
  RSA79598  Cryptantha circumscissa F. W. Peirson 1919-5-10 1001 Los Angeles Arraster [Arrastre] Creek, San Gabriel Mountains. 838 Comment
  RSA79610  Cryptantha circumscissa F. W. Peirson 1933-5-13 10667 Los Angeles Lovejoy Buttes, SW Mojave Desert. Comment
  RSA79630  Mimulus parishii F. W. Peirson 1918-6-16 199 Los Angeles Rock Creek, north slope of San Gabriel Mountains 1448 Comment
  RSA79750  Keckiella ternata subsp. ternata F. W. Peirson 1924-6-26 5395 Los Angeles Near Waterman's Station - Arroyo Seco, San Gabriel Mountains. 976 Comment
  RSA79782  Keckiella cordifolia F. W. Peirson 1924-6-16 4748 Los Angeles Kineloa Road, Eaton Canyon foothills, San Gabriel Mountains. Comment
  RSA79796  Collinsia callosa F. W. Peirson 1922-6-3 4490 Los Angeles East of Oak Grove Creek Divide, Liebre Mts. 1174 Comment
Read comments
Jan 18 2008
  RSA79815  Collinsia callosa F. W. Peirson 1921-6-15 2443 Los Angeles Chilao, San Gabriel Mountains. 1646 Comment
  RSA79838  Penstemon heterophyllus subsp. heterophyllus F. W. Peirson 202 Los Angeles Devils Gate, Arroyo Seco, west of Pasadena. Comment
  RSA79842  Penstemon heterophyllus F. W. Peirson 1929-7-1 8431 Los Angeles Aliso Creek at Tie Canyon, Along bank. 1357 Comment
  RSA79870  Penstemon speciosus F. W. Peirson 1922-7-5 3193 Los Angeles Big Pines Meadow, north side of San Gabriel Mountains 2073 Comment
  RSA79962  Cryptantha micrantha F. W. Peirson 1920-6-10 4482 Los Angeles San Gabriel Mts., summit of Mt. Wilson 1738 Comment
  RSA80007  Amsinckia eastwoodiae F. W. Peirson 1919-3-26 333 Los Angeles vacant lot on south side of New York Drive, east of Hill Ave., Altadena. Comment
  RSA80009  Cryptantha micrantha F. W. Peirson 1920-5-3 5305 Los Angeles Tujunga Wash, west end of San Gabriel Mountains 335 Comment
  RSA80120  Mimulus johnstonii F. W. Peirson 1920-6-10 196 Los Angeles Divide between Mt. Lowe and Mt. Markham 1646 Comment
  RSA80121  Mimulus cardinalis F. W. Peirson 1910-08 194 Los Angeles Mt. Lowe, San Gabriel Mountains. Comment
  RSA80123  Mimulus brevipes F. W. Peirson 1923-5-21 195 Los Angeles Fish Canyon, San Bernardino Mountains 686 Comment
  RSA80142  Mimulus johnstonii F. W. Peirson 1919-6-13 480 Los Angeles Rock Creek. 1296 Comment
  RSA80187  Antirrhinum coulterianum F. W. Peirson 1919-2-12 188 Los Angeles Field near foot of Lukens Trail, San Gabriel Mountains. 610 Comment
  RSA80195  Plagiobothrys collinus var. fulvescens F. W. Peirson 1921-6-15 997 Los Angeles Trail from Pine Flats to Chilao 1677 Comment
  RSA80335  Lycium cooperi F. W. Peirson 1921-5-19 1086 Los Angeles Little Rock Creek 945 Comment
  RSA80363  Foeniculum vulgare F. W. Peirson 1920-6-22 2164 Los Angeles Fruiting branch from New York Drive, Altadena Comment
  RSA80384  Solanum umbelliferum F. W. Peirson 1919-6-15 1082 Los Angeles Rock Creek, north slope of San Gabriel Mountains. 1296 Comment
  RSA80387  Daucus carota F. W. Peirson 1920-6-22 2188 Los Angeles Roadside near Chino Creek, southeastern Los Angeles 152 Comment
  RSA80390  Daucus pusillus F. W. Peirson 1919-6-7 500 Los Angeles Cow Canyon divide, San Antonio Creek Region 1372 Comment
  RSA80421  Linaria canadensis var. texana F. W. Peirson 1920-5-12 2129 Los Angeles San Gabriel Wash at Foothill boulevard, west of Azusa. 183 Comment
  RSA80431  Antirrhinum kelloggii F. W. Peirson 189 Los Angeles Laurel Canyon, Santa Monica Mts. Comment
  RSA80433  Antirrhinum multiflorum F. W. Peirson 1951-1 190 Los Angeles Summit of Mt. Lowe Comment
  RSA80494  Mimulus fremontii var. fremontii F. W. Peirson 1921-5-19 2744 Los Angeles Little Rock Creek: north base of San Gabriel Mountains. 1037 Comment
  RSA80682  Helianthemum scoparium F. W. Peirson 1920-4-22 115 Los Angeles foothill of Rubio Canyon 533 Comment
  RSA80694  Epilobium densiflorum F. W. Peirson 1907-7-9 2085 Los Angeles Pine Flats, San Gabriel Mts. 1524 Comment
  RSA80713  Grindelia camporum F. W. Peirson 1928-9-5 8190 Los Angeles roadside about half dry meadows, Rock Creek, N slope of San Gabriel Mts. 1220 Comment
  RSA80715  Grindelia camporum var. bracteosa F. W. Peirson 1218 Los Angeles Road near Coldwater Canyon, Santa Monica Mts. Comment
  RSA80716  Grindelia camporum var. bracteosa F. W. Peirson 1922-1-5 3294 Los Angeles W of Inglewood on road toward Hermosa Beach Comment
  RSA80755  Cryptantha pterocarya F. W. Peirson 1919-6-4 477 Los Angeles Rock Creek, north slope of San Gabriel Mts. 1692 Comment
  RSA80756  Cryptantha nevadensis var. rigida F. W. Peirson 1919-5-10 5811 Los Angeles Arraster [Arrastre] Creek. North base of San Gabriel Mountains 915 Comment
  RSA80765  Nicotiana glauca F. W. Peirson 1920-4-25 352 Los Angeles Arroyo Seco Canyon, near Pasadena, Ca. 381 Comment
  RSA80772  Nicotiana attenuata F. W. Peirson 1919-6-14 495 Los Angeles Rock Creek, north slope of San Gabriel Mts. 1524 Comment
  RSA81451  Castilleja plagiotoma F. W. Peirson 1918-6-18 210 Los Angeles Rock Creek, north base of San Gabriel Mountains. 1250 Comment
  RSA81468  Castilleja applegatei subsp. martinii F. W. Peirson 1921-7-17 2505 Los Angeles Prairie Fork of San Gabriel River, San Gabriel Mountains. 2012 Comment
  RSA81474  Castilleja minor subsp. spiralis F. W. Peirson 1951-9-1 211 Los Angeles Arroyo Seco, Pasadena Comment
  RSA81475  Castilleja minor subsp. spiralis F. W. Peirson 1924-8-23 5049 Los Angeles West Fork of San Gabriel River. 412 Comment
  RSA82096  Mimulus aurantiacus var. pubescens F. W. Peirson 1903-2-21 358 Los Angeles Coldwater Canyon, Santa Monica Range. Comment
  RSA82097  Mimulus aurantiacus F. W. Peirson 1919-5-18 434 Los Angeles Hills east of Monrovia Canyon 457 Comment
  RSA82128  Orobanche californica subsp. feudgei F. W. Peirson 1921-5-20 2745 Los Angeles Little Rock Creek, San Gabriel Mts. 976 Comment
  RSA82185  Salazaria mexicana F. W. Peirson 1921-5-19 2730 Los Angeles Little Rock Creek 945 Comment
  RSA82190  Trichostema lanatum F. W. Peirson 1918-6-15 176 Los Angeles Mint Canyon below the Camp in the Oaks, northwest corner of San Gabriel Mts. Comment
  RSA82194  Trichostema parishii F. W. Peirson 1921-7-1 2473 Los Angeles Arraster Creek, San Gabriel Mts 1067 Comment
  RSA82209  Phyla lanceolata F. W. Peirson 1951-9-16 1040 Los Angeles Kewen Lake, Pasadena. Comment
  RSA82230  Castilleja affinis subsp. affinis F. W. Peirson 1921-3-6 2725 Los Angeles San Gabriel Wash. 213 Comment
  RSA82233  Castilleja affinis subsp. affinis F. W. Peirson 1920-5-3 2122 Los Angeles Little Tujunga Wash, west end of San Gabriel Mts. 335 Comment
  RSA82243  Castilleja miniata subsp. miniata F. W. Peirson 1921-7-17 2726 Los Angeles Prairie Fork of San Gabriel River, San Gabriel Mountains. 2134 Comment
  RSA82258  Castilleja affinis subsp. affinis F. W. Peirson 1926-4-26 6648 Los Angeles At summit of Mint Canyon Grade east of Saugus. Comment
  RSA82280  Castilleja foliolosa F. W. Peirson 1919-5-10 430 Los Angeles Arraster [Arrastre] Creek. North base of San Gabriel Mountains. 915 Comment
  RSA82311  Scutellaria siphocampyloides F. W. Peirson 1921-6-15 1051 Los Angeles Chilao, San Gabriel Mts. 1677 Comment
  RSA82355  Scutellaria tuberosa F. W. Peirson 1919-3-11 178 Los Angeles Small Canyon east of Rubio Canyon south base of San Gabriel Mtns. at 1800 ft. 549 Comment
  RSA82396  Salvia spathacea F. W. Peirson 1920-5-8 1054 Los Angeles San Raphael Hills. 457 Comment
  RSA82437  Salvia leucophylla F. W. Peirson 1919-5-11 412 Los Angeles Mint Canyon road near the bridge over the Santa Clara River, northwest of San Gabriel Mts. 427 Comment
  RSA82440  Salvia leucophylla F. W. Peirson 1906-7-16 1055 Los Angeles Big ditch north of Elysian Park, Los Angeles. Comment
  RSA82549  Stachys albens F. W. Peirson 1922-7-6 4061 Los Angeles Along Mescal Creek, near Big Pines, north slope of San Gabriel Mts. 2073 Comment
  RSA82555  Stachys albens F. W. Peirson 1921-7-1 1046 Los Angeles Santa Clara River bed in Soledad Canyon, near bridge on road to Mint Canyon. 442 Comment
  RSA82589  Stachys albens F. W. Peirson 1918-8-16 179 Los Angeles San Antonio Canyon, San Gabriel Mts. 1341 Comment
  RSA82992  Salvia dorrii var. pilosa F. W. Peirson 1919-6-15 392 Los Angeles Rock Creek, north slope of San Gabriel Mountains. 1296 Comment
  RSA83001  Stachys bullata F. W. Peirson 1919-5-18 439 Los Angeles Monrovia Canyon, S base of San Gabriel Mountains 457 Comment
  RSA83348  Dudleya cymosa subsp. pumila F. W. Peirson 1924-5-27 4640 Los Angeles Trail below Colby's 853 Comment
  RSA83354  Dudleya cymosa subsp. pumila F. W. Peirson 1926-6-2 7938 Los Angeles Trail up south fork Rock Creek. 1828 Comment
  RSA83360  Dudleya cymosa subsp. pumila F. W. Peirson 1919-5-10 453 Los Angeles Mt.Gleason 1372 Comment
  RSA83395  Dudleya densiflora F. W. Peirson 1919-7-1 517 Los Angeles Fish Canyon 274 Comment
  RSA83396  Dudleya cymosa subsp. pumila F. W. Peirson 1918-5-26 452 Los Angeles toll road to Mt. Wilson Comment
  RSA83411  Dudleya lanceolata F. W. Peirson 1906-7-10 1934 Los Angeles Rustic Canyon, Santa Monica Mtns. Comment
  RSA83413  Monardella macrantha subsp. macrantha F. W. Peirson 183 Los Angeles Santa Anita Trail to West Fork north of Divide at about 4000 ft. 1220 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
  RSA83434  Satureja douglasii F. W. Peirson 1906-7-10 1063 Los Angeles Rustic Canyon, Santa Monica Mtns. Comment
  RSA83435  Pycnanthemum californicum F. W. Peirson 1951-1 184 Los Angeles San Antonio Canyon. Comment
  RSA83976  Saxifraga californica F. W. Peirson 1919-4-19 373 Los Angeles Pacoima Canyon, west end of San Gabriel Mountains 534 Comment
  RSA84227  Monardella linoides F. W. Peirson 1922-7-5 3160 Los Angeles Elevation north of Big Pines called La Montaine 2226 Comment
  RSA84229  Monardella australis subsp. australis F. W. Peirson 1907-7-9 1070 Los Angeles Pine Flats at the headwaters of the Tujunga 1677 Comment
  RSA84271  Ranunculus aquatilis var. capillaceus F. W. Peirson 1922-4-28 2921 Los Angeles Chino Creek, south of Ontario 152 Comment
  RSA84282A  Equisetum telmateia var. braunii F. W. Peirson 1920-4-25 8450 A Los Angeles Arroyo Seco, Pasadena 411 Comment
  RSA84282B  Equisetum hyemale var. affine F. W. Peirson 1920-4-25 8450 B Los Angeles Arroyo Seco, Pasadena 411 Comment
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Jan 4 2014
  RSA84288  Equisetum laevigatum F. W. Peirson 1920-5-12 2133 Los Angeles El Monte Comment
  RSA84353  Boykinia rotundifolia F. W. Peirson 1904-8-28 74 Los Angeles Little Santa Anita Canyon, south base of San Gabriel Mts. Comment
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Feb 1 2012
  RSA84378  Lithophragma bolanderi F. W. Peirson 1922-6-3 3079 Los Angeles At Collins Ranch, north slope of Liebre Mts. 1143 Comment
  RSA84380  Lithophragma tenellum F. W. Peirson 1921-6-16 4690 Los Angeles ridge west of summit of Mt. Waterman 2286 Comment
  RSA84383  Lithophragma bolanderi F. W. Peirson 1925-3-18 5469 Los Angeles South slope of Newhall Grade near Newhall 381 Comment
  RSA84410  Clematis lasiantha F. W. Peirson 51 Los Angeles Rubio Canyon, south base of San Gabriel Mountains. Comment
  RSA84422  Aquilegia formosa F. W. Peirson 1923-5-25 4168 Los Angeles Rock Creek, north slope of San Gabriel Mountains 1296 Comment
  RSA84469  Clematis pauciflora F. W. Peirson 1921-3-6 s.n. Los Angeles San Gabriel Wash. 213 Comment
  RSA84495  Ribes malvaceum F. W. Peirson 1927-3-19 7114 Los Angeles 1 mile or so back on thr range. Seminole Hot Springs, Santa Monica Mts. Comment
  RSA84496  Ribes aureum var. gracillimum F. W. Peirson 1927-3-19 7113 Los Angeles 1 mile or so back on thr range. Seminole Hot Springs, Santa Monica Mts. Comment
  RSA84503  Ribes indecorum F. W. Peirson 1923-4-9 3460 Los Angeles Canyon at Lemon Tank, San Clemente Island Comment
  RSA84504  Ribes indecorum F. W. Peirson 1920-12-30 2341 Los Angeles San Gabriel River Wash at Foothill Blvd, West of Azusa. 137 Comment
  RSA84505  Ribes indecorum F. W. Peirson 1918-11-1 299 Los Angeles along top of ridge on trail to Switzer s Camp, Arroyo Seco 945 Comment
  RSA84838  Ribes nevadense F. W. Peirson 1918-5-26 72 Los Angeles Summit of Mt. Wilson, San Gabriel Mts 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
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Aug 21 2014
  RSA84950  Ribes roezlii F. W. Peirson 1921-6-18 4436 Los Angeles Windy Camp, Mt Islip, San Gabriel Mountains. 2256 Comment
  RSA84951  Ribes quercetorum F. W. Peirson 1922-6-3 2548 Los Angeles East of Oak Grove Creek Divide, Liebre Mts. 1174 Comment
  RSA84973  Ribes roezlii F. W. Peirson 1919-6-14 690 Los Angeles near top of Big Rock Creek 1951 Comment
  RSA84995  Asplenium vespertinum F. W. Peirson 1921-6-21 2840 Los Angeles West Fork of San Gabriel River. 610 Comment
  RSA85007  Adiantum jordanii F. W. Peirson 1921-4-3 2393 Los Angeles Pacoima Canyon, W end of San Gabriel Mtns. 534 Comment
  RSA85031  Polystichum scopulinum F. W. Peirson 1921-6-17 2464 Los Angeles canyon on divide between Little Rock Creek tributary and Bear Creek, San Gabriel Mts. 1920 Comment
  RSA85055  Ephedra nevadensis F. W. Peirson 1921-5-19 1527 Los Angeles Little Rock Creek 945 Comment
  RSA85073  Crossosoma californicum F. W. Peirson 1923-4-11 3444 Los Angeles In canyon below farm buildings at Eagle Ranch, San Clemente Island Comment
  RSA85181  Ephedra viridis F. W. Peirson 1923-5-27 3532 Los Angeles small canyon on Pinyon Ridge, Rock Creek, north slope of San Gabriel Mountains 1295 Comment
  RSA85204  Horkelia cuneata subsp. puberula F. W. Peirson 1923-3-23 4278 Los Angeles San Antonio Wash at Foothill Blvd., Claremont. Comment
  RSA85241  Horkelia rydbergii F. W. Peirson 1921-6-16 2448 Los Angeles Pine Flats. 1524 Comment
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Jul 29 2016
  RSA85264  Holodiscus discolor F. W. Peirson 75 Los Angeles Montana St. Pasadena Comment
  RSA85267  Holodiscus microphyllus F. W. Peirson s.n. Los Angeles Mt. Lowe, San Gabriel Mountains. Comment
  RSA85310  Paeonia californica Mabel Peirson 1925-2-14 5434 Los Angeles Arroyo Seco at the Devil's Gate, Pasadena Comment
  RSA85318  Berberis nevinii F. W. Peirson 1920-3-28 646 Los Angeles About halfway between Devil's Gate and the mountains, Arroyo Seco, west of Altadena 335 Comment
  RSA85319  Berberis aquifolium var. aquifolium F. W. Peirson 1943-5-15 13462 Los Angeles along small stream bed immediately south and above Big Pines Center 2133 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
  RSA85322  Ribes californicum var. hesperium F. W. Peirson 1919-1-5 300 Los Angeles Sawpit Canyon or Monrovia Canyon (the fruiting branch from Fish Canyon), south base of San Gabriel Mts. 457 Comment
  RSA85457  Mahonia dictyota F. W. Peirson 1919-3-6 54 Los Angeles Eaton Canyon, south slope of San Gabriel Mts. 610 Comment
  RSA85522  Ribes amarum F. W. Peirson 1928-2-19 7686 Los Angeles Arroyo Seco 610 Comment
  RSA85608  Ivesia santolinoides F. W. Peirson 1921-6-16 s.n. Los Angeles Summit of Mt. Waterman Ridge 2287 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
  RSA85771  Drymocallis glandulosa var. reflexa F. W. Peirson 1918-6-30 81 Los Angeles Summit of Mt. Wilson, San Gabriel Mountains. Comment
  RSA85865  Cheilanthes newberryi F. W. Peirson 1923-4-10 3439 Los Angeles North slope canyon about 10 miles southeast of Wilson's Cove, San Clemente Island. Comment
  RSA86195  Cystopteris fragilis F. W. Peirson 1920-9-15 2839 Los Angeles Mt. San Antonio, north slope 2819 Comment
  RSA86270  Pellaea mucronata var. mucronata F. W. Peirson 1921-5-20 1510 Los Angeles Little Rock Creek, north slope of San Gabriel Mts. 960 Comment
  RSA86647  Purshia tridentata var. glandulosa F. W. Peirson 1926-4-27 6668 Los Angeles San Gabriel Mountains. North side of San Gabriel Mountains, Rock Creek. 1296 Comment
  RSA86654  Purshia tridentata var. glandulosa F. W. Peirson 1923-5-26 3531 Los Angeles Rock Creek, north slope of San Gabriel Mts. 1448 Comment
  RSA86673  Cercocarpus betuloides var. betuloides F. W. Peirson 1919-3-27 340 Los Angeles Road out of Arroyo Seco. 549 Comment
  RSA86677  Cercocarpus betuloides F. W. Peirson 1927-3-19 7115 Los Angeles Seminole Hot Springs. Santa Monica Mts. Comment
  RSA86688  Leymus triticoides F. W. Peirson 1918-4-28 1604 Los Angeles Southeast of El Monte. Comment
  RSA86693  Vulpia microstachys var. pauciflora F. W. Peirson 1918-5-5 1568 Los Angeles Brents on the Malibu, Santa Monica Mountains. Comment
  RSA86696  Vulpia octoflora var. octoflora F. W. Peirson 1920-5-3 2124 Los Angeles Little Tujunga Wash, west end of San Gabriel Mts. 335 Comment
  RSA86724  Aristida ternipes var. hamulosa F. W. Peirson 1919-11-17 1590 Los Angeles in dense tufts, trail to Mt. Lowe, west of Eaton Canyon 609 Comment
  RSA86729  Avena fatua F. W. Peirson 1918-04 1599 Los Angeles At 1085 New York Drive, Altadena Comment
  RSA86747  Elymus glaucus subsp. glaucus F. W. Peirson 1924-5-27 4632 Los Angeles Tujunga Canyon west end of San Gabriel Mountains. 793 Comment
  RSA86771  Vulpia myuros F. W. Peirson 1921-3-6 2360 Los Angeles San Gabriel Wash. 213 Comment
  RSA86772  Vulpia myuros var. hirsuta F. W. Peirson 1923-4-10 3418 Los Angeles San Clemente Island. Summit of Plateau. Comment
  RSA86773  Vulpia myuros var. hirsuta F. W. Peirson 1918-04 1566 Los Angeles New York Drive, Altadena Comment
  RSA86783  Vulpia microstachys var. pauciflora F. W. Peirson 1921-5-20 5364 Los Angeles Little Rock Creek, north slope of San Gabriel Mts. 960 Comment
  RSA86823  Heteromeles arbutifolia F. W. Peirson 1907-7-1 694 Los Angeles Catalina Island. Comment
  RSA86833  Rubus ursinus F. W. Peirson 1921-5-3 8653 Los Angeles North Fork of Millards Canyon 1067 Comment
  RSA86835  Rubus ursinus F. W. Peirson 1919-5-11 5308 Los Angeles Arraster [Arrastre] Creek, San Gabriel Mountains. 915 Comment
  RSA86836  Rubus ursinus F. W. Peirson 1919-4-19 380 Los Angeles Pacoima Canyon, western end of San Gabriel Mountains. 610 Comment
  RSA86837  Rubus parviflorus F. W. Peirson 1921-6-17 1958 Los Angeles Buckhorn, at crossing of Little Rocky [Little Rock Creek] by the Chilao Islip Trail, San Gabriel Mts 1982 Comment
  RSA86842  Prunus virginiana var. demissa F. W. Peirson 1923-5-26 3528 Los Angeles Vincent Gulch side of Rock Creek Divide, San Gabriel Mountains 2012 Comment
  RSA86845  Prunus virginiana var. demissa F. W. Peirson 1921-7-17 2622 Los Angeles Prairie Fork of San Gabriel River, San Gabriel Mountains 2210 Comment
  RSA86847  Prunus emarginata F. W. Peirson 1919-6-16 492 Los Angeles South Fork of Rock Creek, San Gabriel Mountains 1829 Comment
  RSA86853  Prunus emarginata F. W. Peirson 1941-6-24 s.n. Los Angeles Summit of ridge above Big Pines, north side of San Gabriel Mountains, near Los Angeles-San Bernardino County line. Comment
  RSA86954  Lupinus ruber F. W. Peirson 1921-5-18 2428 Los Angeles Palmdale, Antelope Valley 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
  RSA87063  Hordeum brachyantherum F. W. Peirson 1918-4-28 1606 Los Angeles Road east and south of El Monte. Comment
  RSA87068  Koeleria macrantha F. W. Peirson 1918-4-28 1596 Los Angeles Road east and south of El Monte. Comment
  RSA87092  Lupinus bicolor F. W. Peirson 1919-5-10 413 Los Angeles Arraster [Arrastre] Creek, San Gabriel Mountains. 838 Comment
  RSA87111  Galium johnstonii F. W. Peirson 1922-7-5 3159 Los Angeles Elevation north of Big Pines called La Montaine 2226 Comment
  RSA87117  Agrostis stolonifera F. W. Peirson 1923-8-31 4015 Los Angeles Big Pines Camp, north side of San Gabriel Mountains. 2088 Comment
  RSA87122  Agrostis exarata F. W. Peirson 1923-8-31 4329 Los Angeles Big Pines Camp, north side of San Gabriel Mountains. 2088 Comment
  RSA87127  Koeleria macrantha F. W. Peirson 1918-6-30 1597 Los Angeles Summit of Mt. Wilson, San Gabriel Mountains. Comment
  RSA87153  Quercus wislizeni var. frutescens F. W. Peirson 1919-5-10 403 Los Angeles Trail from Arraster [Arrastre] Creek to Mt. Gleason, San Gabriel Mts 1524 Comment
  RSA87162  Quercus durata var. gabrielensis F. W. Peirson 1919-5-14 376 Los Angeles East trail to Mt. Lowe 640 Comment
  RSA87166  Quercus durata var. gabrielensis F. W. Peirson 1919-5-14 1710 Los Angeles Eaton Canyon. 686 Comment
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Dec 19 2014
  RSA87167  Quercus durata var. gabrielensis F. W. Peirson 1919-4-19 5341 Los Angeles Pacoima Canyon, west end of San Gabriel Mountains 534 Comment
  RSA87171  Quercus agrifolia var. agrifolia F. W. Peirson 1919-4-5 369 Los Angeles road to Mt. Wilson 457 Comment
  RSA87192  Lupinus excubitus var. johnstonii F. W. Peirson 1929-7-1 8442 Los Angeles Mt. Pacifico 1982 Comment
  RSA87205  Lupinus elatus F. W. Peirson 1921-6-16 2438 Los Angeles Waterman ridge 2287 Comment
  RSA87208  Lupinus elatus F. W. Peirson 1929-7-1 8439 Los Angeles Mt. Pacifico 2058 Comment
  RSA87324  Muhlenbergia microsperma F. W. Peirson 1918-5-5 1589 Los Angeles Brents on the Malibu, Santa Monica Mountains. Comment
  RSA87325  Muhlenbergia microsperma F. W. Peirson 1927-3-20 7118 Los Angeles Summit of ridge south of Malibu Lake Comment
  RSA87328  Melica stricta var. albicaulis F. W. Peirson 1923-5-25 3524 Los Angeles Along stream on south side of canyon of Rock Creek, north slope of San Gabriel Mountains. 1296 Comment
  RSA87347  Galium andrewsii subsp. intermedium F. W. Peirson 1919-5-10 399 Los Angeles Arraster [Arrastre] Creek. 976 Comment
  RSA87351  Elymus stebbinsii F. W. Peirson 1920-6-10 2158 Los Angeles Maple Springs Trail to Mt. Lowe 1219 Comment
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Jul 19 2008
  RSA87423  Lupinus polyphyllus subsp. bernardinus F. W. Peirson 1923-5-21 3520 Los Angeles Fish Canyon, San Bernardino Mountains 686 Comment
  RSA87455  Elymus trachycaulus subsp. subsecundus F. W. Peirson 1920-9-17 5369 Los Angeles San Antonio Canyon, San Gabriel Mountains. 1341 Comment
  RSA87460  Melica imperfecta F. W. Peirson 1918-4-28 1541 Los Angeles Turnbull Canyon near Whittier, Puente Hills. Comment
  RSA88717  Carex alma F. W. Peirson 1921-5-20 5371 Los Angeles Mojave Desert, Little Rock Creek, San Gabriel Mountains 1067 Comment
  RSA88743  Carex hassei F. W. Peirson 1923-5-25 4269 Los Angeles along stream on south side of canyon of Rock Creek, San Gabriel Mountains. 1296 Comment
  RSA88757  Carex praegracilis F. W. Peirson 1918-4-28 1624 Los Angeles Southeast of El Monte. Comment
  RSA88803  Carex fracta F. W. Peirson 1922-7-6 3178 Los Angeles Big Pines Camp 2088 Comment
  RSA88805  Carex phaeocephala F. W. Peirson 1922-7-21 4267 Los Angeles north slope of Mt. Antonio, San Gabriel Mts., line between Los Angeles and San Bernardino counties 2988 Comment
  RSA90181  Astragalus bicristatus F. W. Peirson 1921-7-17 2510 Los Angeles Prairie Fork of San Gabriel River, San Gabriel Mountains 2058 Comment
  RSA90343  Lotus wrangelianus F. W. Peirson 1918-5-5 4072 Los Angeles along road to [Brents] on the Malibu, Santa Monica Mts. Comment
  RSA90754  Astragalus pycnostachyus var. lanosissimus F. W. Peirson 1951-7-19 591 Los Angeles Playa del Rey, coast of Los Angeles Co. Comment
  RSA91501  Trifolium ciliolatum F. W. Peirson 1923-5-21 3517 Los Angeles Fish Canyon 914 Comment
  RSA92422  Helianthus gracilentus F. W. Peirson 1919-7-3 512 Los Angeles San Gabriel Mts: on Lukens Peak trail. 1220 Comment
  RSA94704  Packera ionophylla F. W. Peirson 1921-7-17 2511 Los Angeles Prairie Fork of San Gabriel River. 2134 Comment
  RSA94709  Senecio astephanus F. W. Peirson 1919-7-3 8568 Los Angeles Lukens Peak Trail 762 Comment
  RSA94958  Malacothrix clevelandii F. W. Peirson 1920-6-10 4314 Los Angeles Maple Springs Trail to Mt. Lowe 1219 Comment
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Jul 19 2008
  RSA95363  Ceanothus megacarpus F. W. Peirson 1918-5-5 731 Los Angeles along road to [Brents] on the Malibu, Santa Monica Mts. Comment
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Apr 20 2019
  SBBG28949  Lupinus elatus F. W. Peirson 1918-6-10 88 Los Angeles summit of San Gabriel Pk 1859 Comment
  SBBG54413  Maianthemum stellatum F. W. Peirson 1921-7-17 2349 Los Angeles Prairie Fk of San Gabriel River 2133 Comment
  SD58283  Nemophila menziesii var. integrifolia Frank W. Peirson 1918-5-19 166 Los Angeles San Gabriel Mountains; Millards Canyon. 609 Comment
  SD70399  Lathyrus vestitus var. vestitus Frank W. Peirson 1920-5-16 2137 Los Angeles San Gabriel Mountains, Tujunga 472 Comment
  SD70410  Viola pedunculata Frank W. Peirson 1919-3-27 332 Los Angeles Foot of Lukens Peak trail, San Gabriel Mountains 579 Comment
  SD70418  Dudleya cymosa subsp. pumila Frank W. Peirson 1918-7-7 262 Los Angeles Ontario Ridge, San Gabriel Mountains. 2590 Comment
  SD87544  Caulanthus major F. W. Peirson 1922-7-5 Los Angeles Le Montaine summit at head of Le Montaine Creek. 2135 Comment
  SD87545  Baccharis salicina F. W. Peirson 1924-10-19 5228 Los Angeles Clearwater Comment
  SD87549  Leptosiphon breviculus Frank W. Peirson 1929-7-1 8443 Los Angeles Mt. Pacifico, San Gabriel Mountains. 1981 Comment
  SD87569  Cryptantha intermedia F. W. Peirson 1919-5-11 402 Los Angeles San Gabriel Mountains, Arraster 915 Comment
  SD87630  Rigiopappus leptocladus F. W. Peirson 1922-6-3 Los Angeles North slope of Liebre Mts. road to Collins Ranch 1145 Comment
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Jul 10 2010
  SD87655  Ericameria nauseosa var. hololeuca Frank W. Peirson 1925-6-23 6026 Los Angeles Upper part of Mint Canyon. Comment
  SD87679  Heliotropium curassavicum var. oculatum F. W. Peirson 1923-5-27 3542 Los Angeles Pallett Creek, San Gabriel Mountains 1095 Comment
  SD87721  Venegasia carpesioides F. W. Peirson 1924-5-24 4619 Los Angeles Topango Canyon, Santa Monica Mountains 89 Comment
  SD87762  Lemmonia californica F. W. Peirson 1921-6-14 2421 Los Angeles Tujunga Comment
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Mar 26 2016
  SD87785  Silene lemmonii F. W. Peirson 1924-5-27 4624 Los Angeles North slope Strawberry Peak, San Gabriel Mountains. 1520 Comment
  SD87808  Nemacladus longiflorus F. W. Peirson 1921-6-21 2453 Los Angeles West Fork of San Gabriel River. 640 Comment
  SD87859  Viola douglasii F. W. Peirson 1921-6-15 2447 Los Angeles Trail Pine Flats to Chilao 1676 Comment
  SD87872  Collinsia callosa F. W. Peirson 1921-6-15 2443 Los Angeles Chilao, San Gabriel Mtns. 1646 Comment
  SEINET209192  Artemisia californica F. W. Peirson 1918-9-15 245 Los Angeles Los Angeles County: Near foot of Sister Elsie Peak trail. San Gabriel Mountains. 640 Comment
  UC1076517  Heterotheca sessiliflora subsp. fastigiata Frank W. Peirson 1922-9-26 Los Angeles at California Street Bridge Arroyo Seco Comment
  UC1199869  Dodecatheon clevelandii subsp. clevelandii Frank W. Peirson 1919-2-9 321 Los Angeles Fish Canyon San Gabriel Mts., Fish Canyon 304 Comment
  UC39369  Oenothera sinuosa F. W. Peirson 1920-6-13 2160 Los Angeles Pasadena Comment
  UC483075  Salix laevigata Frank W. Peirson 1923-5-27 9609 Los Angeles Pallett Creek San Gabriel Mts., Pallett Creek 1097 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
  UC501470  Clarkia heterandra Frank W. Peirson 1923-6-9 3551 Los Angeles Liebre Mts., Pine Canyon 1188 Comment
  UC501505  Rosa woodsii subsp. gratissima Frank W. Peirson 1918-6-17 470 Los Angeles Rock Creek San Gabriel Range 1676 Comment
  UC501533  Polycarpon tetraphyllum Frank W. Peirson 1931-5-25 9376 Los Angeles Altadena; 1077 New York Avenue Comment
  UC501591  Smilacina stellata Frank W. Peirson 1921-7-17 2349 Los Angeles Prairie fork of San Gabriel River; cienega on s side 2133 Comment
  UC511781  Phacelia davidsonii Frank W. Peirson 1921-6-14 2826 Los Angeles Pine Flats San Gabriel Range 1676 Comment
  UC511787  Nicolletia occidentalis Frank W. Peirson 1933-5-13 10662 Los Angeles 12 mi s Muroc Comment
  UC511915  Lepidium perfoliatum Frank W. Peirson 1933-5-13 10666 Los Angeles 12 mi ne Lancaster Comment
  UC511917  Phacelia fremontii Frank W. Peirson 1933-5-13 10633 Los Angeles 10 mi s Muroc Comment
  UC530091 Image available Githopsis gilioides Frank W. Peirson 1925-4-23 5780 Los Angeles forks San Gabriel River San Gabriel Mountains, San Gabriel River; San Gabriel Mts., Los Angeles Co. 533 Comment
  UC566788  Sanicula arguta Frank W. Peirson 1923-4-9 3429 Los Angeles near Wilson Cove (San Clemente Island); San Clemente Island Comment
  UC571020  Brickellia nevinii Frank W. Peirson 1924-12-5 5382 Los Angeles Head of Eaton Canyon, s face of San Gabriel Peak, San Gabriel Mountains San Gabriel Mountains, San Gabriel Peak, Eaton Canyon 1645 Comment
  UC635032  Eriogonum umbellatum var. munzii Frank W. Peirson 1922-7-5 4684 Los Angeles peak n Big Pines Camp; San Gabriel Mts. Comment
  UC635067  Dodecahema leptoceras Frank W. Peirson 1925-4-19 5776 Los Angeles e of Pacoima bridge (on upper boulevard) Comment
  UC635441  Meconella denticulata Frank W. Peirson 1925-4-23 5806 Los Angeles below Forks; San Gabriel Canyon 365 Comment
  UC672223  Solidago confinis Frank W. Peirson 1922-9-14 4744 Los Angeles San Antonio Canyon San Garbriel Mts., San Antonio Canyon (San Gabriel Mts.) 914 Comment
  UC908474  Gilia nevinii Frank W. Peirson 1923-4-9 3433 Los Angeles Wilsons Cove and adjacent terrain , Wilsons Cove and adj terrain (San Clemente Island) Comment
  UC908542  Eriastrum pluriflorum Frank W. Peirson 1927-5-7 7268 Los Angeles 12 mi s Muroc Comment
  UC908547  Gilia ochroleuca subsp. bizonata Frank W. Peirson 1919-5-10 268 Los Angeles Arraster Creek San Gabriel Mts., Arraster Creek 914 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
  UC908886  Gilia ochroleuca subsp. bizonata F. W. Peirson 1923-5-26 3534 Los Angeles Rock Creek Divide San Gabriel Mountains, Rock Creek Divide 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
  UC909133  Loeseliastrum matthewsii Frank W. Peirson 1921-5-19 952 Los Angeles Little Rock Creek 1036 Comment
  UCD45239  Quercus berberidifolia F. W. Peirson 1919-5-11 404 Los Angeles Arraster Creek, San Gabriel Mountains. 853 Comment
  UCD46688  Quercus kelloggii F. W. Peirson 1921-7-3 1708 Los Angeles Rock Creek, San Gabriel Mountains. (Leaves July 3, 1921; Flowers May 26, 1923). 1996 Comment
  UCD86844  Muhlenbergia microsperma F. W. Peirson 1927-3-20 7118 Los Angeles south of Malibu Lake. Comment
  UCD87952  Melica imperfecta F. W. Peirson 1923-4-12 3420 Los Angeles Wilsons Cove, San Clemente Island. Comment
  UCD88321  Melica stricta F. W. Peirson 1923-5-25 4250 Los Angeles Rock Creek, San Gabriel Mts. Comment
  UCD90369  Poa annua F. W. Peirson 1923-4-12 3420 Los Angeles Big Pines Meadow, San Gabriel. 2087 Comment
  UCR142553  Hesperocnide tenella F. W. Peirson 1921-2-26 2356 Los Angeles Western Transverse Range; Santa Monica Mtns., Topanga Canyon Divide 488 Comment
  UCR168450  Gilia leptantha subsp. transversa F. W. Peirson 1921-5-20 4132 Los Angeles Transverse Ranges; San Gabriel Mountains, Little Rock Creek 1006 Comment
  UCR208206  Potentilla glandulosa subsp. nevadensis F. W. Peirson 1922-7-5 5249 Los Angeles San Gabriel Mountains, Big Pines, Swarthout Valley Comment
  UCSB24354  Epilobium glaberrimum Peirson, Frank 1921-7-17 Los Angeles Prairie Fork, San Gabriel River, San Gabriel Mountains 2011 Comment
  CAS-BOT-BC123032  Lessingia lemmonii var. peirsonii Frank Warrington Peirson 1923-6-9 3550 Los Angeles Liebre Mts., Kings Canyon 1173 Comment
  CAS-BOT-BC12818  Lepidium perfoliatum Frank W. Peirson 1933-5-13 10666 Los Angeles 12 miles northeast of Lancaster. Comment
  CAS-BOT-BC13487  Amblyopappus pusillus F. W. Peirson; Mabel B. Peirson 1922-4-7 1392 Los Angeles San Pedro Comment
  CAS-BOT-BC17666  Carex alma Frank W. Peirson 1918-5-21 1636 Los Angeles San Gabriel Mountains. Arroyo Seco Canyon. Comment
  CAS-BOT-BC242781  Eriogonum davidsonii F. W. Peirson No date on label s.n. Los Angeles Mt. Wilson, San Gabriel Mts. 2133 Comment
  CAS-BOT-BC253463  Eriogonum gracile Frank W. Peirson 1928-9-4 8184 Los Angeles Mohave Desert east of Palmdale Comment
  CAS-BOT-BC263041  Eriogonum maculatum Frank W. Peirson 1927-5-7 7264 Los Angeles 4 miles east of Lancaster Comment
  CAS-BOT-BC267623  Eriogonum saxatile F. W. Peirson 1929-6-30 8434 Los Angeles On the trail to Mr. Pacifico where they were seen at various places up to the summit, Tie Canyon, Aliso Creek tributary, San Gabriel Mts. 1432 Comment
  CAS-BOT-BC296957  Eriophyllum wallacei Frank W. Peirson 1919-5-30 346 Los Angeles Tujunga Canyon, west end of San Gabriel Mts. 426 Comment
  CAS-BOT-BC296963  Eriophyllum wallacei Frank W. Peirson 1919-5-9 1391 Los Angeles Arraster Creek, San Gabriel Mts. 838 Comment
  CAS-BOT-BC308392  Eriophyllum pringlei F. W. Peirson 1926-4-26 6656 Los Angeles About 1 mile east of Palmdale, southwestern Mojave Desert Comment
  CAS-BOT-BC308393  Eriophyllum pringlei F. W. Peirson 1927-5-12 1386 Los Angeles Location of County Auto Camp, Mint Canyon Comment
  CAS-BOT-BC339275  Lessingia glandulifera var. glandulifera F. W. Peirson 1921-7-19 1260 Los Angeles Camp at Coldwater & Cattle Canons [Canyons], San Gabriel Mts. 792 Comment
  CAS-BOT-BC344380  Madia exigua Frank W. Peirson 1921-6-21 2446 Los Angeles San Gabriel Mts. W.F. San Gabriel Riv. Comment
  CAS-BOT-BC344383  Madia exigua F. W. Peirson 1923-5-21 3511 Los Angeles Along trail in Fish Canyon south slope of San Gabriel Mts. 914 Comment
  CAS-BOT-BC352917  Lasthenia coronaria F. W. Peirson 1921-3-3 330 Los Angeles Arroyo Seco, San Gabriel Mts. 350 Comment
  CAS-BOT-BC376622  Syntrichopappus fremontii F. W. Peirson 1926-4-26 6650 Los Angeles Palmdale Road about 3 miles southwest of summit of Vincent 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-BC388657  Minuartia douglasii Frank W. Peirson 1922-6-4 3075 Los Angeles Soledad Pass, north of Vincent 944 Comment
  CAS-BOT-BC402079  Gilia ochroleuca subsp. vivida F. W. Peirson 1929-7-1 8438 Los Angeles Summit Mt. Pacifico, San Gabriel Mts. 2148 Comment
  CAS-BOT-BC423123  Cleomella obtusifolia Frank W. Peirson 1933-5-13 10661 Los Angeles Twelve miles south of Muroc Comment
  CAS-BOT-BC426252  Lithophragma affine Frank W. Peirson 1921-3-12 4190 Los Angeles Big Santa Anita Canyon, San Gabriel Mts. 762 Comment
  CAS-BOT-BC426253  Lithophragma affine Frank W. Peirson 1925-4-23 5805 Los Angeles San Gabriel River 365 Comment
  CAS-BOT-BC432201  Lithophragma bolanderi Frank W. Peirson 1921-4-13 2395 Los Angeles Pacoima Canyon, San Gabriel Mts. 548 Comment
  CAS-BOT-BC434370  Sidotheca trilobata Frank W. Peirson 1921-6-14 1783 Los Angeles Tujunga Canyon, San Gabriel Mts. 1280 Comment
  CAS-BOT-BC472003  Allium lacunosum var. davisiae F. W. Peirson; H. L. Mason 1926-4-26 6658 Los Angeles 2 miles east of Palmdale, Mohave Desert Comment
  CAS-BOT-BC515035  Eriastrum sapphirinum subsp. sapphirinum F. W. Peirson 1918-11-2 156 Los Angeles San Gabriel Mts., Hennigers Flat, Mt. Wilson Toll Road 853 Comment
  CAS-BOT-BC60047  Lepidium virginicum var. menziesii Frank W. Peirson 1921-3-3 2357 Los Angeles San Gabriel Mountains. Hills of the Arroyo Seco. 426 Comment
  CAS-BOT-BC64024  Anisocoma acaulis Frank W. Peirson 1924-5-14 4608 Los Angeles Near Summit Cajon Pass Comment
  CAS-BOT-BC67710  Pellaea andromedifolia Frank W. Peirson 1919-12-2 1513 Los Angeles San Gabriel Mts. - West Fork Rubio 685 Comment
  JEPS11400  Scrophularia californica Frank W. Peirson 1918-6-30 191 Los Angeles along Mt. Wilson Toll Road Mt. Wilson; San Gabriel Mts 1097 Comment
  JEPS11574  Penstemon centranthifolius Frank W. Peirson 1918-5-26 200 Los Angeles Henniger Flats San Gabriel Mountains, Henniger Flats 868 Comment
  JEPS11680  Orobanche parishii Frank W. Peirson 1919-5-10 416 Los Angeles San Gabriel Mts., Arraster Canyon, Arraster Creek 914 Comment
  JEPS11806  Heterocodon rariflorum Frank W. Peirson 1921-6-14 1210 Los Angeles Trail Fork San Gabriel; San Gabriel Mountains 990 Comment
  JEPS11822  Githopsis diffusa subsp. diffusa Frank W. Peirson 1921-6-13 1208 Los Angeles Big Santa Anita Trail San Gabriel Mountains 1066 Comment
  JEPS1355  Phacelia ramosissima var. latifolia Frank W. Peirson 1920-6-10 2159 Los Angeles foot of Echo Mt. Trail San Gabriel Mountains 579 Comment
  JEPS14005 Image available Osmorhiza brachypoda Frank W. Peirson 451 a Los Angeles Arroyo Seco San Gabriel Mountains; Arroyo Seco, San Gabriel Mts. 609 Comment
  JEPS14823  Sisymbrium irio Frank W. Peirson 1923-3-23 3355 Los Angeles streets of Claremont Claremont Comment
  JEPS15841  Lomatium lucidum Frank W. Peirson 1920-5-6 801 Los Angeles trail from Monrovia Canyon to Fish Canyon (San Gabriel Mts.); San Gabriel Mts. 838 Comment
  JEPS16003  Angelica tomentosa Frank W. Peirson 1921-7-19 2508 Los Angeles San Gabriel Mountains, San Gabriel River, Cow Canyon Cow Canyon; San Gabriel Mountains, San Gabriel River, Cow Canyon 914 Comment
  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
  JEPS17761 Image available Calochortus clavatus Frank W. Peirson 1918-6-16 288 Los Angeles Mint Canyon, top of first grade Mint Canyon Comment
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Nov 9 2011
  JEPS20124  Pectocarya linearis subsp. ferocula Frank W. Peirson 1919-3-27 324 Los Angeles Arroyo Seco San Gabriel Mountains 381 Comment
  JEPS2194  Phacelia cicutaria var. hispida F. W. Peirson 1918-6-1 161 Los Angeles Henninger Flats San Gabriel Mts. 868 Comment
  JEPS23355  Delphinium cardinale Frank W. Peirson 1918-6-28 49 Los Angeles foothills e Rubio Canyon (ne of Altadena); Angeles National Forest 609 Comment
  JEPS2406  Phacelia distans Frank W. Peirson 1919-1 311 Los Angeles Arroyo Seco San Gabriel Mountains 381 Comment
  JEPS2672 Image available Orobanche valida Frank W. Peirson and Mabel B. Peirson 1928-6-2 7937 Los Angeles South Fork Rock Creek San Gabriel Mts.; South Fork Rock Creek, San Gabriel Mts., Los Angeles Co. 1905 Comment
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Jan 24 2011
  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
  JEPS2823  Rorippa curvipes var. truncata Frank W. Peirson 1921-6-19 2450 Los Angeles Crystal Lake San Gabriel Mountains, North Fork San Gabriel River; Crystal Lake, North Fork, San Gabriel River, San Gabriel Mts. 1676 Comment
  JEPS31794  Camissoniopsis hirtella F. W. Peirson 1918-5-26 128 Los Angeles Henniger Flats San Gabriel Mts. 868 Comment
  JEPS32108  Agnorhiza ovata Frank W. Peirson 1326 Los Angeles Pine Flats Region San Gabriel Mountains, Pine Flats 1676 Comment
  JEPS32343  Euthamia occidentalis Frank W. Peirson 4161 Los Angeles Santa Clara River near Saugus 350 Comment
  JEPS36270  Agoseris heterophylla var. heterophylla F. W. Peirson 1922-7-7 3189 Los Angeles Wrights; San Gabriel Mts., Swartout Valley 1844 Comment
  JEPS36539  Hypochaeris glabra F. W. Peirson 1920-5-14 1469 Los Angeles Arroyo Seco; San Gabriel Mts. 441 Comment
  JEPS36567  Hieracium argutum F. W. Peirson 1921-7-16 2502 Los Angeles San Gabriel River San Gabriel Mts. 1371 Comment
  JEPS36670  Hieracium argutum F. W. Peirson 1918-8-6 258 Los Angeles Old Mt. Wilson Trail San Gabriel Mountains 822 Comment
  JEPS36692  Stephanomeria virgata subsp. virgata F. W. Peirson 1918-11-2 295 Los Angeles Henniger Flats San Gabriel Mts. 868 Comment
  JEPS38338  Madia exigua F. W. Peirson 1918-5-26 238 Los Angeles Henninger Flats San Gabriel Canyon 868 Comment
  JEPS39205  Layia platyglossa F. W. Peirson 1919-3-27 328 Los Angeles Hill w of Arroyo Seco; San Gabriel Mts. 426 Comment
  JEPS39870  Rumex fueginus F. W. Peirson 1921-6-19 2449 Los Angeles San Gabriel Mountains. Crystal Lake. North Fork San Gabriel Comment
  JEPS39882  Rumex conglomeratus Frank W. Peirson 1919-6-5 463 Los Angeles San Antonio Canyon San Gabriel Mountains 1310 Comment
  JEPS40053  Layia glandulosa Frank W. Peirson 1925-4-23 5803 Los Angeles below Forks; San Gabriel Canyon 396 Comment
  JEPS40141  Arceuthobium campylopodum Frank W. Peirson 1921-6-15 2322 Los Angeles near Chilao San Gabriel Mtns 1645 Comment
  JEPS40829  Symphyotrichum lanceolatum var. hesperium Frank W. Peirson 1923-8-30 4020 Los Angeles Lone Pine Canon, at Clyde Ranch San Gabriel Mountains, Lone Pine Canon 1493 Comment
  JEPS41206  Mentzelia montana Frank W. Peirson 1918-6-12 120 Los Angeles Trail at Mt. Markham San Gabriel Mts., Mt. Markhkam 1645 Comment
  JEPS41491  Erigeron foliosus var. foliosus Frank W. Peirson 1920-9-15 2285 Los Angeles 2 mi n Baldy; San Gabriel Mts., Summit of Pine Mt. 2941 Comment
  JEPS41758  Erigeron divergens Frank W. Peirson 1921-7-16 2500 Los Angeles Prairie Fork San Gabriel Mts., San Gabriel River-Prairie Fork 1554 Comment
  JEPS42753  Mentzelia dispersa Frank W. Peirson 1921-6-14 2466 Los Angeles San Gabriel Mountains, Trail Fork San Gabriel River Canyon 975 Comment
  JEPS42770  Mentzelia dispersa Frank W. Peirson 1922-5-30 3074 Los Angeles San Gabriel Mountains, Mt. Lowe, Westspur 1371 Comment
  JEPS43131  Oxalis corniculata Frank W. Peirson 1920-5-6 212 b Los Angeles Fish Canyon San Gabriel Mtns 274 Comment
  JEPS43824  Clarkia epilobioides Frank W. Peirson 1919-5-18 433 Los Angeles hills e Monrovia Canyon; San Gabriel Mountains 457 Comment
  JEPS44137  Centaurea melitensis Frank W. Peirson 1919-5-18 435 Los Angeles hills e of Monrovia Canyon; San Gabriel Mts. 457 Comment
  JEPS47134  Cuscuta subinclusa Frank W. Peirson 1918-8-6 261 Los Angeles old trail to Mt. Wilson 609 Comment
  JEPS47683  Lithophragma tenellum Frank W. Peirson 1921-6-16 2442 Los Angeles trail n Mt. Waterman; San Gabriel Mountains, trail n of Mt. Waterman 1828 Comment
  JEPS48028  Sedum spathulifolium Frank W. Peirson 1919-5-14 428 Los Angeles West Fork Eaton Canyon San Gabriel Mountains, West Fork Eaton Canyon 990 Comment
  JEPS48061  Sedum spathulifolium Frank W. Peirson 1921-6-21 2472 Los Angeles West Fork San Gabriel Riv. , West Fork San Gabriel Riv (San Gabriel Mountains) 685 Comment
  JEPS49582  Parnassia californica Frank W. Peirson 1922-8-25 2249 Los Angeles San Gabriel Mountains, South Fork Santa Ana Meadows South Fork Santa Ana Meadows; San Gabriel Mountains, South Fork Santa Ana Meadows 2438 Comment
  JEPS50921  Silene multinervia Frank W. Peirson 1918-6-4 41 Los Angeles foothills e Rubio Canyon; foothills e of Rubio Canyon 609 Comment
  JEPS51647  Argemone rotundata Frank W. Peirson 1918-7-9 55 Los Angeles San Gabriel Mountains, San Antonio Canyon San Antonio Canyon; San Gabriel Mountains, San Antonio Canyon 1981 Comment
  JEPS51799  Eschscholzia californica Frank W. Peirson 1919-2-12 319 Los Angeles Arroyo Seco San Gabriel Mts. 457 Comment
  JEPS52413  Chamaesyce melanadenia F. W. Peirson 1919-1-25 310 Los Angeles Arroyo Seco 381 Comment
  JEPS53127  Boechera platysperma Frank W. Peirson 1918-7-7 58 Los Angeles Ontario Ridge San Gabriel Mts. 2438 Comment
  JEPS53236  Athysanus pusillus Frank W. Peirson 1919-4-5 60 a Los Angeles Sierra Madre Trail to Mount Wilson; San Gabriel Mountains 762 Comment
  JEPS5324  Lobelia dunnii var. serrata F. W. Peirson 1918-8-6 260 Los Angeles old trail to Mount Wilson 838 Comment
  JEPS53253  Brassica rapa Frank W. Peirson 1919-1-26 306 Los Angeles hills w. Rubio Canyon (San Gabriel Mts.); San Gabriel Mts. 579 Comment
  JEPS53274  Camelina microcarpa Frank W. Peirson 1922-7-7 3181 Los Angeles San Gabriel Mountain, Swartout Valley, Rangers Cabin Swartout Valley; San Gabriel Mountain, , Rangers Cabin 1798 Comment
  JEPS53771  Lepidium virginicum Frank W. Peirson 1921-3-3 2357 Los Angeles hills w Arroyo Seco; San Gabriel Mountians 426 Comment
  JEPS53883  Sisymbrium officinale Frank W. Peirson 1920-4-25 2109 Los Angeles Arroyo Seco; San Gabriel Mountains, Arroyo Seco 411 Comment
  JEPS54102  Guillenia lasiophylla Frank W. Peirson 1919-5-27 327 Los Angeles hills w Arroyo Seco; San Gabriel Mountains 426 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
  JEPS55284  Lathyrus vestitus var. vestitus Frank W. Peirson 1918-5-12 104 Los Angeles Arroyo Seco San Gabriel Mts. 396 Comment
  JEPS55858  Lotus strigosus Frank W. Peirson 1918-5-26 322 Los Angeles Henniger Flats San Gabriel Mountains 853 Comment
  JEPS56852  Eriogonum inerme Frank W. Peirson 1921-6-15 2452 Los Angeles Pine Flat San Gabriel Mountains, Pine Flat 1676 Comment
  JEPS57997  Oxytheca trilobata Frank W. Peirson 1921-6-14 1783 Los Angeles Tujunga Canyon San Gabriel Mountains 1280 Comment
  JEPS58328  Linanthus ciliatus Frank W. Peirson 1919-6-6 455 Los Angeles North Fork San Antonio Cnayon San Gabriel Mountains 1981 Comment
  JEPS58473  Linanthus liniflorus Frank W. Peirson 1919-6-6 456 Los Angeles Cow Canyon divide San Gabriel Mountains 1371 Comment
  JEPS58814  Pyrola dentata F. W. Peirson 1920-9-14 519 a Los Angeles On ridges around the head of The Coldwater up to the San Antonio Divide, San Gabriel Mountains 2133 Comment
  JEPS61328  Mirabilis laevis Frank W. Peirson 1919-1-25 307 Los Angeles Arroyo Seco 381 Comment
  JEPS61500  Allium campanulatum Frank W. Peirson 1922-7-5 3192 Los Angeles about 1/2 mi w Big Pines (along left bank of stream); San Gabriel Mountains, Mescal Creek Comment
  JEPS61593  Chlorogalum pomeridianum var. pomeridianum Frank W. Peirson 1918-6-28 10 Los Angeles Lower Rubio Canyon 579 Comment
  JEPS61725  Calochortus splendens Frank W. Peirson 1918-6-12 8 Los Angeles e of Rubio Canyon Comment
  JEPS62154  Smilacina stellata Frank W. Peirson 1920-9-14 1682 Los Angeles Coldwater Cienega San Gabriel Mountains 2133 Comment
  JEPS62247  Zigadenus fremontii Frank W. Peirson 1921-4-21 2402 Los Angeles Sycamore Flat to San Dimas Creek; San Gabriel Mountains 792 Comment
  JEPS63349  Monardella linoides var. stricta Frank W. Peirson 1922-7-5 3160 Los Angeles near Swartout Valley (Le Montaine Creek, n of Big Pines); San Gabriel Mts. 2225 Comment
  JEPS6395  Plantago erecta Frank W. Peirson 1919-3-27 329 Los Angeles Arroyo Seco San Gabriel Mountains 411 Comment
  JEPS64468  Platanthera sparsiflora Frank W. Peirson 1919-6-6 504 Los Angeles North Fork San Antonio Creek San Gabriel Mountains (wet bank) 2286 Comment
  JEPS65164  Lupinus formosus Frank W. Peirson 1918-5-26 90 Los Angeles Henniger Flats 868 Comment
  JEPS65522  Medicago lupulina Frank W. Peirson 1922-7-7 3191 Los Angeles Ranger's Cabin San Gabriel Mountains, Swartout Valley 1798 Comment
  JEPS68644  Malva nicaeensis F. W. Peirson 3356 Los Angeles streets of Claremont Claremont Comment
  JEPS69103  Eriastrum sapphirinum Frank W. Peirson 1921-7-1 922 Los Angeles Arraster Creek San Gabriel Mountains (n slope of mt.) 944 Comment
  JEPS7520  Madia gracilis Frank W. Peirson 1919-6-5 508 Los Angeles San Antonio Canyon, very close to boundary of San Bernardino County Angeles National Forest, San Gabriel Mts. Comment
  JEPS78513  Lobelia dunnii var. serrata F. W. Peirson 1918-8-6 260 Los Angeles old trail to Mount Wilson 838 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
  JEPS9472  Galium angustifolium subsp. angustifolium Peirson 1918-6-28 213 a Los Angeles foothills e Rubio Canyon Comment
  JEPS9551  Dicentra chrysantha Frank W. Peirson 1918-6-10 56 Los Angeles Mt. Markham; San Gabriel Mountains 1615 Comment
  JEPS9855  Limosella acaulis Frank W. Peirson 1922-7-5 3155 Los Angeles Small Lake 2 mi w Big Pines (<lake is one of the sources of Mescal Cr. and lies in the westward extension of the Lone Pine-Swartout Valley depression. F. W. Peirson>); San Gabriel Mountains 1859 Comment
  LA97922  Mimulus guttatus Frank W. Peirson; 1923-4-10 3471 Los Angeles San Clemente Island, South slope canyon about 5 mi SE of Eagle Ranch Comment
  PASA1101  Lotus oblongifolius Frank W. Peirson 1919-5-21 Los Angeles Arroyo Seco 548 Comment
  PASA1287  Stellaria nitens Frank W. Peirson 1929-4-23 Los Angeles Forks of the San Gabriel River 533 Comment
  PASA1310  Arenaria macradenia Frank W. Peirson 1921-7-1 Los Angeles Aliso Creek at Tie Canyon, San Gabriel Mts. 1356 Comment
  PASA1317  Arenaria douglasii Frank W. Peirson 1923-5-21 Los Angeles Fish Canyon, San Gabriel Mts. 914 Comment
  PASA1488  Eriogonum pusillum Frank W. Peirson 1923-5-27 Los Angeles Pillett Creek, San Gabriel Mts. 1097 Comment
  PASA1495  Eriogonum thurberi Frank W. Peirson 1930-5-30 Los Angeles Mint Canyon 609 Comment
  PASA1573  Rigiopappus leptocladus Frank W. Peirson 1922-6-3 Los Angeles Private roadway on the Collin's Ranch. North slope Liebre Mts. Comment
  PASA1691  Lessingia lemmonii Frank W. Peirson 1928-9-5 Los Angeles Road from Rock Creek to Big Pines, San Gabriel Mts. 1280 Comment
  PASA1742  Haplopappus cooperi Frank W. Peirson 1921-5-19 Los Angeles Little Rock Creek Comment
  PASA1801  Aster canescens Frank W. Peirson 1923-8-30 Los Angeles North of Big Pines Auto Camp 1310 Comment
  PASA1828  Osmorhiza brachypoda Frank W. Peirson 1919-5-21 Los Angeles Arrroyo Seco Canyon 609 Comment
  PASA1881  Lythrum californicum Frank W. Peirson 1920-9-5 Los Angeles Eaton Canyon, San Gabriel Mts. 457 Comment
  PASA1910  Godetia cylindrica Frank W. Peirson 1923-6-19 Los Angeles Boquet Canyon 1066 Comment
  PASA1929  Conium maculatum Frank W. Peirson 1920-4-25 Los Angeles Verdugo Canyon 274 Comment
  PASA1988  Cryptantha micrantha var. lepida Frank W. Peirson 1920-6-10 Los Angeles Summit Mt. Wilson 1737 Comment
  PASA2055  Streptanthus heterophyllus Frank W. Peirson 1919-3-27 Los Angeles Hills west of Arroyo Seco 426 Comment
  PASA2075  Sisymbrium altissimum Frank W. Peirson 1921-5-18 Los Angeles 1 miles south of Saugus Comment
  PASA2171  Amblyopappus pusillus Mabel B. Peirson 1922-4-7 Los Angeles San Pedro Comment
  PASA2201  Chaenactis xantiana Frank W. Peirson 1930-5-12 Los Angeles Along boulevard northwest of Acton Comment
  PASA2285  Gnaphalium chilense Frank W. Peirson 1921-6-19 Los Angeles Crystal Lake, North Fork San Gabriel River 1676 Comment
  PASA2331  Madia exigua Frank W. Peirson 1923-5-21 Los Angeles Fish Canyon, San Gabriel Mts. 914 Comment
  PASA2594  Tropidocarpum gracile Frank W. Peirson 1930-5-12 8791 Los Angeles 3 miles north of Mint Canyon summit, about opposite Acton Comment
  PASA2695  Chenopodium fremontii Frank W. Peirson 1924-10-26 5258 Los Angeles Arroyo Seco below California St. bridge, Pasadena 198 Comment
  PASA328  Malacothrix altissima Frank W. Peirson 1921-7-20 Los Angeles San Gabriel River 457 Comment
  PASA335  Rafinesquia californica Frank W. Peirson 1923-4-11 Los Angeles In canyon below farm buildings, Eagle Ranch, San Clemente Island Comment
  PASA347  Stephanomeria runcinata Frank W. Peirson 1928-9-4 Los Angeles Roock Creek about 1 mile below canyon Comment
  PASA350  Uropappus linearifolius Frank W. Peirson 1919-5-10 Los Angeles Arraster Creek, San Gabriel Mts. 914 Comment
  PASA596  Mirabilis laevis var. glutinosa Frank W. Peirson 1930-7-10 Los Angeles Big Rock Creek 1371 Comment
  PASA615  Eleocharis parishii Frank W. Peirson 1930-5-31 Los Angeles Lovejoy Buttes, Mohave Desert Comment
  PASA657  Lupinus densiflorus var. mcgregorii Frank W. Peirson 1923-6-27 Los Angeles Rock Creek, San Gabriel Mts. 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
  PASA92  Cordylanthus rigidus Frank W. Peirson 1918-8-6 Los Angeles Mt. Wilson Toll Road, San Gabriel Mts., 2850ft 868 Comment
  PASA924  Crepis acuminata Frank W. Peirson 1921-7-17 Los Angeles Praire Fork of the San Gabriel River 2011 Comment
  PASA987  Castilleja montana Frank W. Peirson 1921-7-17 Los Angeles Praire Fork of the San Gabriel River 2133 Comment
  PASA992  Castilleja stenantha Frank W. Peirson 1924-8-23 Los Angeles West Fork San Gabriel River 411 Comment
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Jan 30 2017
  POM12544  Thlaspi arvense F. W. Peirson 1919-2-23 s.n. Los Angeles Henninger Flats. N of Pasadena. 869 Comment
  POM12575  Cyperus rotundus F. W. Peirson 1922-8-1 3265 Los Angeles Pasadena, High school grounds Comment
  POM13510  Allium campanulatum F. W. Peirson 1922-7-5 3192 Los Angeles 0.5 mile east of Big Pines, San Gabriel Mtns. 2027 Comment
  POM13525  Centrostegia thurberi F. W. Peirson 1922-7-7 3172 Los Angeles Sheep Creek. North base of San Gabriel Mountains. 1448 Comment
  POM13526  Camelina microcarpa F. W. Peirson 1922-7-7 3181 Los Angeles Ranger's Cabin, Swartout Valley. 1799 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
  POM13535  Orobanche californica subsp. feudgei F. W. Peirson 1922-7-7 s.n. Los Angeles Ranger's Cabin, Swartout Valley. 1799 Comment
  POM13590  Lomatium nevadense var. parishii F. W. Peirson 1922-7-6 s.n. Los Angeles Blue Ridge near Swartout Valley. 2316 Comment
  POM175491  Descurainia pinnata subsp. halictorum F. W. Peirson 1922-7-6 5329 Los Angeles Big Pines Camp 2088 Comment
  POM175548  Heterocodon rariflorum F. W. Peirson 1921-6-14 1210 Los Angeles Short Cut Canyon. 991 Comment
  POM19150  Heliotropium curassavicum F. W. Peirson 1923-5-27 6891 Los Angeles Pallett Creek, San Gabriel Mts. Comment
  POM20530  Madia elegans subsp. vernalis F. W. Peirson 1923-5-21 s.n. Los Angeles Fish Canyon, San Gabriel Mountains 838 Comment
  POM20546  Lupinus microcarpus var. microcarpus F. W. Peirson 1922-6-4 4223 Los Angeles Soledad Pass, sw Mojave Desert. 945 Comment
  POM223606  Stephanomeria virgata F. W. Peirson 1919-10-20 295 Los Angeles Brae Burn Road, Altadena. Comment
  POM254665  Atriplex serenana F. W. Peirson 1923-10-7 4162 Los Angeles Santa Clara River at Aqueduct crossing. Comment
  POM47637  Viola purpurea subsp. mohavensis F. W. Peirson 1919-5-10 745 Los Angeles Mount Gleason 1738 Comment
  POM47656  Collomia grandiflora F. W. Peirson 1924-5-28 4634 Los Angeles Hoyt Ranch, Tujunga Canyon, San Gabriel Mountains. 579 Comment
  POM47666  Silene antirrhina F. W. Peirson 1921-6-19 2681 Los Angeles North Fork of San Gabriel River 1006 Comment
  POM69717  Mentzelia dispersa F. W. Peirson 1922-5-30 3074 Los Angeles west spur of Mt. Lowe 1372 Comment
  POM96038  Allium lacunosum var. davisiae F. W. Peirson 1926-4-26 6658 Los Angeles 2 miles east of Palmdale, Mojave Desert. Comment
  POM96042  Allium fimbriatum var. fimbriatum F. W. Peirson 1926-4-26 6661 Los Angeles 5 miles west of Rock Creek, Mohave Desert. Comment
  POM9681  Centaurium exaltatum F. W. Peirson 1921-7-2 2482 Los Angeles Pallett Creek, San Gabriel Mountains. 1098 Comment
  POM9683  Malacothamnus fremontii F. W. Peirson 1918-6-15 2672 Los Angeles Upper Mint Canon. [canyon] Comment
  POM9685  Lupinus formosus var. formosus F. W. Peirson 1919-5-10 704 Los Angeles Arraster Creek 915 Comment
  POM9737  Equisetum laevigatum F. W. Peirson 1920-5-12 2133 Los Angeles El Monte Comment
  POM9773  Gaura sinuata F. W. Peirson 1920-6-13 2160 Los Angeles Altadena, at northwest corner of N.Y. Ave. and Maiden Lane. Comment
  POM9778  Collinsia parryi F. W. Peirson 1920-5-28 2156 Los Angeles San Antonio Mountains: Bear Canyon 1372 Comment
  POM9792  Polystichum scopulinum F. W. Peirson 1921-6-17 2464 Los Angeles canyon on divide between Little Rock Creek tributary and Bear Creek, San Gabriel Mts. 1920 Comment
  POM9851  Eriogonum brachyanthum F. W. Peirson 1921-5-19 s.n. Los Angeles Little Rock Creek. 976 Comment
  POM9913  Cheilanthes covillei F. W. Peirson 1921-5-3 2404 Los Angeles Bear Canyon Ridge west of Mt. Lowe 1219 Comment
  POM9921  Fritillaria pinetorum Frank W. Peirson 1921-6-18 2454 Los Angeles Mt. Williamson (2 miles north of Mt. Islip), San Gabriel Mountains 2317 Comment
  POM9926  Sphaeralcea emoryi subsp. variabilis F. W. Peirson 1921-5-18 s.n. Los Angeles Palmdale, Antelope Valley. Comment
  POM9941  Allium peninsulare var. peninsulare F. W. Peirson 1919-7-1 509 Los Angeles Fish Canyon, San Gabriel Mountains 610 Comment
  POM9942  Layia glandulosa F. W. Peirson 1921-7-3 s.n. Los Angeles 2 miles east of Rock Creek 2287 Comment
  POM99735  Antirrhinum coulterianum F. W. Peirson 188 Los Angeles Foothills east of Rubio C. San Gabriel Mts. Comment
  RSA0000378  Habenaria leucostachys var. virida Frank W. Peirson 1918-7-8 12 Los Angeles San Antonio Canyon, San Gabriel Mountains. Comment
  RSA0001998  Radicula sinuata var. truncata F. W. Peirson 1921-6-19 2450 Los Angeles Crystal Lake, San Gabriel Mts. 1677 Comment
  RSA0002277  Githopsis diffusa F. W. Peirson 1925-4-23 5780 Los Angeles Forks of San Gabriel River. 534 Comment
  RSA0002500  Convolvulus peirsonii F. W. Peirson 1923-5-27 3537 Los Angeles On north bank of canyon of Rock Crrek, north base of San Gabriel Mts. Comment
  RSA0003807  Phacelia austromontana F. W. Peirson 1928-6-2 7940 Los Angeles San Gabriel Mts., Trail up South Fork of Rock Creek 1829 Comment
  RSA0004010  Calystegia occidentalis subsp. fulcrata F. W. Peirson 1929-7-1 8448 Los Angeles Mt. Pacifico. 1905 Comment
  RSA0004200  Malvastrum gabrielense F. W. Peirson 1921-7-1 774 Los Angeles Arraster Creek, San Gabriel Mts 1067 Comment
  RSA0004846  Navarretia atractyloides var. flavida F. W. Peirson 1921-6-20 2444 Los Angeles North Fork of San Gabriel River 457 Comment
  RSA0005674  Potentilla peirsonii F. W. Peirson 1919-6-16 493 Los Angeles S Fork of Rock Creek, San Gabriel Mts. 1982 Comment
  RSA0005769  Potentilla peirsonii F. W. Peirson 1919-6-16 493 Los Angeles S Fork of Rock Creek, San Gabriel Mts. 1982 Comment
  RSA0005776  Galium siccatum var. anotinum F. W. Peirson 1918-8-7 215 Los Angeles Mt. San Antonio ('Baldy'), San Gabriel Mts. 2134 Comment
  RSA0005777  Galium siccatum var. anotinum F. W. Peirson 1919-6-7 215 Los Angeles Cow Canyon Divide, San Gabriel Mts. 1372 Comment
  RSA0006074  Orobanche valida subsp. valida F. W. Peirson 1928-6-2 7937 Los Angeles S fork of Rock Creek: trail toward the summit. 1982 Comment
  RSA0008516  Pentachaeta lyonii F. W. Peirson 1908-4-18 1221 Los Angeles Point Fermin. Comment
  RSA0008517  Pentachaeta lyonii F. W. Peirson 1908-4-18 1223 Los Angeles Point Fermin. 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
  RSA0017013  Rosa woodsii subsp. gratissima F. W. Peirson 1918-6-17 470 Los Angeles Rock Creek, northern base of San Gabriel Mountains. 1677 Comment
  RSA0017024  Arabis platysperma var. platysperma F. W. Peirson 1920-9-12 58 Los Angeles South trail to Baldy (Mt. San Antonio), San Gabriel Mts. 2820 Comment
  RSA0017034  Galium grande F. W. Peirson 1919-4-15 s.n. Los Angeles Sierra Madre Trail above the Madronas 915 Comment
  RSA0017161  Gilia ochroleuca subsp. vivida F. W. Peirson 1929-7-1 8438 Los Angeles Mt. Pacifico: summit 2149 Comment
  RSA0017178  Gilia ochroleuca subsp. vivida F. W. Peirson 1928-6-2 7934 Los Angeles S fork of Rock Creek: trail toward the summit. 1982 Comment
  RSA0019985  Bromus tectorum F. W. Peirson 1922-7-5 5363 Los Angeles Big Pines Camp, north side of San Gabriel Mountains 2104 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
  RSA0030025  Delphinium patens subsp. montanum F. W. Peirson 1919-6-14 50 Los Angeles Rock Creek, San Gabriel Mountians. 1982 Comment
  RSA0038318  Lotus heermannii F. W. Peirson 1921-6-19 4077 Los Angeles Crystal Lake, North Fork of San Gabriel River. 1676 Comment
  RSA0039200  Thysanocarpus laciniatus F. W. Peirson 1919-4-19 5334 Los Angeles Pacoima Canyon, west end of San Gabriel Mts. 549 Comment
  RSA0039215  Thysanocarpus laciniatus F. W. Peirson 1923-4-12 3446 Los Angeles Wilson s Cove, San Clemente Island. Comment
  RSA0059170  Orobanche bulbosa F. W. Peirson 1919-5-14 417 Los Angeles East trail to Mt. Lowe, San Gabriel Mts. 1295 Comment
  RSA0060115  Nicotiana clevelandii F. W. Peirson 1091 Los Angeles Ballona, coast of Los Angeles Co. Comment
  RSA0062944  Heuchera elegans F. W. Peirson 1928-6-2 7935 Los Angeles Trail up south fork of Rock Creek, north face of San Gabriel Mts. 1905 Comment
  RSA0063155  Andropogon glomeratus var. scabriglumis F. W. Peirson 1918-10-16 1571 Los Angeles Near foot of Pacoima Canyon, west end of San Gabriel Mts. Comment
  RSA0063244  Heuchera elegans F. W. Peirson 1924-5-27 4639 Los Angeles San Gabriel Mountains. North slope, Strawberry Peak. 1753 Comment
  RSA0063268  Heuchera elegans F. W. Peirson 1905-1 s.n. Los Angeles Mt. Lowe, San Gabriel Mountains. Comment
  RSA0063269  Heuchera elegans F. W. Peirson 1921-6-17 2669 Los Angeles Divide between Little Rock Creek and Bear Creek, north side of San Gabriel Mountains. 1921 Comment
  RSA0063270  Heuchera elegans F. W. Peirson 1922-5-30 67 Los Angeles West spur of Mt Lowe, San Gabriel Mountains. 1341 Comment
  RSA0066074  Allium monticola F. W. Peirson 1923-5-25 3547 Los Angeles Rock Creek, north slope of San Gabriel Mts. 1295 Comment
  RSA0074503  Heterotheca fastigiata F. W. Peirson 1920-9-13 5274 Los Angeles San Antonio Canyon, San Gabriel Mts. 1981 Comment
  RSA0074532  Heterotheca fastigiata F. W. Peirson 1924-10-26 5263 Los Angeles Arroyo Seco, Pasadena. 198 Comment
  RSA0076269  Orobanche multicaulis Frank W. Peirson 1926-5-8 6728 Los Angeles 12 miles east of Palmdale, Antelope Valley. Comment
  RSA0076347  Collinsia callosa F. W. Peirson 1921-6-15 2443 Los Angeles Abundant from Pine Flats to Islip, in the Chilao district, San Gabriel Mountains. (Pine Flats is now Charlton Flats; presumably Mt. Islip is what is referred to simply as 'Islip' - R.C.B.) 1646 Comment
  RSA0076379  Collinsia torreyi var. wrightii F. W. Peirson 1922-7-5 3156 Los Angeles Big Pines, Swartout Valley, north slope of San Gabriel Mountains. 2104 Comment
  RSA0078632  Orobanche californica subsp. feudgei F. W. Peirson 1929-7-1 8435 Los Angeles Aliso Creek, San Gabriel Mts. 1584 Comment
  RSA0078633  Orobanche californica subsp. feudgei F. W. Peirson 1921-7-3 2489 Los Angeles South of Swartout Valley, north side of San Gabriel Mts. 2255 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
  RSA0079411  Cryptantha muricata var. jonesii F. W. Peirson 1919-5-7 1024 Los Angeles South side of New York Drive, Altadena, (east of Hill Ave.). Comment
  RSA0081651  Sedum spathulifolium F. W. Peirson 1921-6-21 2472 Los Angeles West Fork of San Gabriel River. 610 Comment
  RSA0081653  Sedum spathulifolium Frank W. Peirson 1908-5-9 428 Los Angeles Rocky banks of West Fork of Eaton Canyon, south base of San Gabriel Mts. 991 Comment
  RSA0091277  Amsinckia spectabilis F. W. Peirson s.n. Los Angeles Ballona. Comment
  RSA0091448  Amsinckia tessellata var. tessellata Frank W. Peirson 1930-5-12 8792 Los Angeles Along boulevard nearly opposite Acton, about 3 miles north of Mint Canyon summit. Comment
  RSA0098582  Spergularia villosa F. W. Peirson 1923-4-8 3449 Los Angeles San Clemente Island, back from Wilsons Cove. Comment
  RSA0100999  Malacothamnus F. W. Peirson 1918-6-15 2672 Los Angeles Upper Mint Canyon, northwestern part of San Gabriel Mts. Comment
  RSA0104651  Eriastrum densifolium subsp. austromontanum F. W. Peirson 1919-7-29 521 Los Angeles Summit of Mt. Wilson, San Gabriel Mountains 1738 Comment
  RSA0104653  Eriastrum densifolium subsp. austromontanum F. W. Peirson 1919-6-14 482 Los Angeles Rock Creek, San Gabriel Mts. 1295 Comment
  RSA0107975  Eriastrum densifolium subsp. austromontanum F. W. Peirson 1928-9-4 8181 Los Angeles Wash about 0.5 mile above Saugus. Comment
  RSA0117330  Collinsia parryi F. W. Peirson 1918-6-1 193 Los Angeles Eaton Canyon, in the San Gabriel Mountains, northeast of Altadena 915 Comment
  RSA0117383  Collinsia parryi F. W. Peirson 1923-5-21 3514 Los Angeles Fish Canyon, San Gabriel Mountains. 732 Comment
  RSA0117386  Collinsia parryi F. W. Peirson 1921-6-14 2828 Los Angeles Tujunga Canyon, west end of San Gabriel Mountains. 1250 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
  RSA0122854  Eriastrum sapphirinum subsp. brevibracteatum F. W. Peirson 1921-7-1 922 Los Angeles Arraster Creek. 945 Comment
  RSA0128610  Arabis repanda var. repanda F. W. Peirson 1921-6-16 2498 Los Angeles North slope of Mt. Waterman, San Gabriel Mts. 1981 Comment
  RSA0128633  Arabis repanda var. repanda F. W. Peirson 1921-6-16 2498 Los Angeles North slope of Mt. Waterman, San Gabriel Mts. 1981 Comment
  RSA100228  Githopsis diffusa subsp. diffusa F. W. Peirson 1921-6-13 1208 Los Angeles Big Santa Anita Canyon Trail, about 1.5 miles below Sturdevants. 1067 Comment
  RSA100232  Lobelia dunnii var. serrata F. W. Peirson 1918-8-6 260 Los Angeles Sierra Madre Trail to Mt. Wilson 838 Comment
  RSA100234  Lobelia dunnii var. serrata F. W. Peirson 1924-8-23 5048 Los Angeles West Fork of San Gabriel River. 411 Comment
  RSA100275  Plectritis ciliosa subsp. insignis F. W. Peirson 1925-4-23 5807 Los Angeles San Gabriel River 366 Comment
  RSA35774  Potentilla glandulosa subsp. nevadensis F. W. Peirson 1922-7-5 5249 Los Angeles Big Pines Camp, north slope of San Gabriel Mountains, eastern Los Angeles Co. Comment
  RSA37398  Apiastrum angustifolium F. W. Peirson 1919-5-18 133 Los Angeles Hills east of Monrovia Canyon 457 Comment
  RSA409729  Cuscuta subinclusa F. W. Peirson 1924-10-26 57 [6]1 Los Angeles Arroyo Seco, Pasadena. 198 Comment
  RSA424843  Eriogonum pusillum F. W. Peirson 1921-7-2 s.n. Los Angeles Pallett Creek, San Gabriel Mountains. 1098 Comment
  RSA632116  Dudleya cymosa subsp. pumila F. W. Peirson 1932-6-26 877 Los Angeles San Gabriel Canyon 335 Comment
  RSA64577  Eriogonum saxatile F. W. Peirson 1918-6-30 24 Los Angeles San Gabriel Mountains: between Sn Gabriel Peak and Mt. Wilson 1646 Comment
  RSA64585  Eriogonum pusillum F. W. Peirson 1923-8-31 4006 Los Angeles Blue Ridge, eastern San Gabriel Mountains near line between Los Angeles and San Bernardino counties. 2591 Comment
  RSA64755  Chenopodium multifidum F. W. Peirson 1920-10-1 2291 Los Angeles Gasoline station back of Chamber of Commerce Building, Pasadena Comment
  RSA64758  Chenopodium ambrosioides F. W. Peirson 1923-1-21 5270 Los Angeles Pond north of East Lake Park, Los Angeles. Comment
  RSA64768  Eriogonum thurberi F. W. Peirson 1951-9-24 s.n. Los Angeles San Gabriel Wash, bridge. Comment
  RSA64774  Oxytheca trilobata F. W. Peirson 1929-7-1 8418 Los Angeles Aliso Creek, San Gabriel Mts. 1098 Comment
  RSA64779  Oxytheca perfoliata F. W. Peirson 1930-5-31 8908 Los Angeles Covering large areas near Lovejoy Butte. Comment
  RSA64780  Oxytheca perfoliata F. W. Peirson 1917-5-13 1784 Los Angeles W. Mojave Desert. Comment
  RSA64785  Chenopodium murale F. W. Peirson 1923-4-9 3481 Los Angeles San Clemente Island: canyon near Lemon Tank at Middle ranch Comment
  RSA64803  Chenopodium berlandieri var. sinuatum F. W. Peirson 1924-10-26 5258 Los Angeles Arroyo Seco, below California St. bridge, Pasadena 198 Comment
  RSA64807  Chenopodium californicum F. W. Peirson 1919-5-26 348 Los Angeles New York Ave. in the Rubio Wash, Altadena. Comment
  RSA64831  Chenopodium pumilio F. W. Peirson 1919-11-12 1823 Los Angeles Holliston Ave. between Boulevard and Mendocino, Altadena. Comment
  RSA65046  Silene lemmonii F. W. Peirson 1924-5-27 4624 Los Angeles north slope of Strawberry Peak, San Bernardino Mts. 1524 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
  RSA65155  Eriogonum elongatum var. elongatum F. W. Peirson 1924-12-5 5385 Los Angeles San Gabriel Mountains: along Little Santa Anita Trail 762 Comment
  RSA65164  Loeflingia squarrosa var. squarrosa F. W. Peirson 1921-6-20 5348 Los Angeles N fork San Gabriel River 914 Comment
  RSA65177  Lastarriaea coriacea F. W. Peirson 1919-5-21 447 Los Angeles foot of canyon proper, on Arroyo Seco. 381 Comment
  RSA65221  Eriogonum maculatum F. W. Peirson 1927-5-7 7264 Los Angeles 4 miles east of Lancaster. Comment
  RSA65242  Chorizanthe procumbens F. W. Peirson 1920-4-26 4212 Los Angeles Santa Anita Wash, S base of San Gabriel Mts. 213 Comment
  RSA65243  Chorizanthe procumbens F. W. Peirson 1919-5-20 446 Los Angeles Foot of Arroyo Seco Canyon, South base of San Gabriel Mountains 381 Comment
  RSA65304  Eriogonum thurberi F. W. Peirson 1930-5-30 8901 Los Angeles shade of oaks, Mint Canyon 610 Comment
  RSA65346  Atriplex watsonii F. W. Peirson 1923-4-11 3462 Los Angeles In canyon below farm buildings at Eagle Ranch, San Clemente Island Comment
  RSA65366  Rumex acetosella F. W. Peirson 1919-5-18 1809 Los Angeles South slope of San Gabriel Mountains. Monrovia Canyon. 427 Comment
  RSA65368  Rumex acetosella F. W. Peirson 1924-5-27 4630 Los Angeles Colby's Ranch 976 Comment
  RSA65369  Pterostegia drymarioides F. W. Peirson 1925-4-23 5790 Los Angeles Forks of San Gabriel River. 534 Comment
  RSA65374  Atriplex semibaccata F. W. Peirson 1919-2-16 1816 Los Angeles Point Fermin. Comment
  RSA65394  Atriplex semibaccata F. W. Peirson 1928-1-14 7685 Los Angeles Vacant field east of Norwalk Insane Asylum. Comment
  RSA65410  Calandrinia ciliata F. W. Peirson 1919-3-16 4318 Los Angeles Pasadena Glen, 2800 ft. 854 Comment
  RSA65437  Calandrinia ciliata F. W. Peirson 1919-3-30 356 Los Angeles Tujunga Canyon, west end of San Gabriel Mts. Comment
  RSA65446A  Lewisia rediviva F. W. Peirson 1905-7-14 37 Los Angeles South of summit of Mt. San Antonio, San Gabriel Mountains Comment
  RSA65446B  Spraguea F. W. Peirson 1905-7-14 37 Los Angeles South of summit of Mt. San Antonio, San Gabriel Mountains Comment
  RSA65463  Rumex maritimus F. W. Peirson 1804 Los Angeles San Fernando Valley. 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
  RSA65492  Spergula arvensis F. W. Peirson 1923-3-18 5322 Los Angeles field, San Gabriel Blvd at olf Eucalyptus road, San Gabriel Valley Comment
  RSA65497  Arenaria serpyllifolia F. W. Peirson 1924-5-27 4622 Los Angeles Colby's Ranch 975 Comment
  RSA65498  Arenaria macradenia var. arcuifolia F. W. Peirson 1923-5-25 4286 Los Angeles Summit of Mint Canyon Grade, s. w. Mojave Desert. 975 Comment
  RSA65504  Minuartia douglasii F. W. Peirson 1920-6-10 5316 Los Angeles below Inspiration Point, Mt. Lowe. 1341 Comment
  RSA65506  Minuartia douglasii F. W. Peirson 1921-5-3 5315 Los Angeles Bear Canyon Ridge west of Mt. Lowe 1219 Comment
  RSA65516  Sagina decumbens subsp. occidentalis F. W. Peirson 1923-3-18 3353 Los Angeles field, San Gabriel Blvd at olf Eucalyptus road, San Gabriel Valley Comment
  RSA65570  Spergularia rubra F. W. Peirson 1920-5-11 2132 Los Angeles Summit of Echo Mountain. 976 Comment
  RSA65609  Cerastium glomeratum F. W. Peirson 1865 Los Angeles Altadena. Comment
  RSA65616  Cerastium glomeratum F. W. Peirson 1919-5-18 438 Los Angeles Hills east of Monrovia Canyon 457 Comment
  RSA65660  Cardionema ramosissimum F. W. Peirson 1863 Los Angeles Playa del Rey. Comment
  RSA65694  Silene laciniata subsp. major F. W. Peirson 1923-5-21 4288 Los Angeles Fish Canyon, San Gabriel Mountains. 610 Comment
  RSA65695  Silene laciniata subsp. major F. W. Peirson 1919-4-19 42 Los Angeles Pacoima Canyon, west end of San Gabriel Mountains 457 Comment
  RSA65702  Silene gallica F. W. Peirson 1923-4-8 3447 Los Angeles Wilson s Cove, San Clemente Island. Comment
  RSA65707  Silene antirrhina F. W. Peirson 1919-5-14 421 Los Angeles Eaton Canyon 732 Comment
  RSA65710  Silene antirrhina F. W. Peirson 1921-6-19 2681 Los Angeles North Fork of San Gabriel River 1006 Comment
  RSA65721  Claytonia perfoliata subsp. intermontana F. W. Peirson 1920-5-1 4685 Los Angeles Eaton Canyon, 0.25 mile above Idle Hour Camp. Comment
  RSA65734  Claytonia perfoliata subsp. intermontana F. W. Peirson 1923-5-26 3545 Los Angeles Trail northward from Rock Creek Divide, San Gabriel Mountains 2134 Comment
  RSA65744  Mollugo verticillata F. W. Peirson 1951-8-18 1855 Los Angeles Long Beach Park, Long Beach Comment
  RSA65756  Stellaria nitens F. W. Peirson 5781 Los Angeles along trail to Cattle Canyon Comment
  RSA65760  Stellaria nitens F. W. Peirson 1918-5-26 43 Los Angeles Hennigers Flat, Mt. Wilson Toll Road 853 Comment
  RSA65781  Cleomella parviflora Mabel Peirson 1932-4-17 9858 Los Angeles Lovejoy Dam, Lovejoy Butte, SW Mojave Desert. Comment
  RSA65794  Lepidium virginicum var. pubescens F. W. Peirson 1919-3-1 674 Los Angeles Altadena. Comment
  RSA65808  Thlaspi arvense F. W. Peirson 1919-2-23 66 Los Angeles Henniger s Falt, San Gabriel Mts 854 Comment
  RSA65819  Descurainia pinnata subsp. menziesii F. W. Peirson 1919-1-25 309 Los Angeles Foot of Arroyo Seco Canyon, Pasadena 381 Comment
  RSA65820  Descurainia pinnata subsp. menziesii F. W. Peirson 1922-7-6 5329 Los Angeles Big Pines Camp 2088 Comment
  RSA65824  Sisymbrium officinale F. W. Peirson 1920-4-25 2109 Los Angeles Arroyo Seco, west of Pasadena 411 Comment
  RSA65826  Sisymbrium irio F. W. Peirson 1923-3-23 3355 Los Angeles Claremont. 365 Comment
  RSA65829  Descurainia incana subsp. viscosa F. W. Peirson 1921-6-19 2467 Los Angeles Crystal Lake, North Fork San Gabriel River 1676 Comment
  RSA65839  Sisymbrium altissimum F. W. Peirson 1921-5-18 5330 Los Angeles One mile south of Saugus. Comment
  RSA65841  Sisymbrium altissimum F. W. Peirson 1918-5-26 61 Los Angeles Henni[n]gers Flat Comment
  RSA65892  Centrostegia thurberi var. thurberi F. W. Peirson 1926-5-8 6725 Los Angeles 4 miles east of Palmdale, Antelope Valley. Comment
  RSA65893  Centrostegia thurberi F. W. Peirson 1922-7-7 3172 Los Angeles Sheep Creek. North base of San Gabriel Mountains. 1448 Comment
  RSA65894  Centrostegia thurberi var. thurberi F. W. Peirson 1930-5-31 8909 Los Angeles Below Lovejoy Dam, Lovejoy Buttes, southwestern Mojave Desert. Comment
  RSA65909  Eriogonum nidularium F. W. Peirson 1930-5-31 8914 Los Angeles Below Lovejoy Dam, Lovejoy Buttes, southwestern Mojave Desert. Comment
  RSA65921  Rumex crispus F. W. Peirson 1930-5-31 8913 Los Angeles Below Lovejoy Dam, Lovejoy Buttes, southwestern Mojave Desert. Comment
  RSA65923  Rumex violascens F. W. Peirson 1918-6-15 4217 Los Angeles Lake near Palmdale, W Mojave Desert. Comment
  RSA65973  Eriogonum baileyi F. W. Peirson 1921-11-11 2718 Los Angeles E shore of lake near the road to Antelope Valley Comment
  RSA65996  Eriogonum deflexum var. baratum F. W. Peirson 1921-7-2 2471 Los Angeles San Gabriel Mountains: Pallett Creek 1082 Comment
  RSA66024  Eriogonum gracile var. gracile F. W. Peirson 1921-7-19 1743 Los Angeles San Gabriel Mts: junction of Coldwater Canyon and Cattle Canyon 793 Comment
  RSA66026  Eriogonum gracile var. gracile F. W. Peirson 1918-11-2 296 Los Angeles Hennigers Flat, north San Gabriel Mts. 854 Comment
  RSA66033  Eriogonum gracile var. gracile F. W. Peirson 1928-9-4 8184 Los Angeles East of Palmdale. Comment
  RSA66042  Eriogonum baileyi var. baileyi F. W. Peirson 1928-7-1 8417 Los Angeles San Gabriel Mountains: Aliso Canyon 1098 Comment
  RSA66068  Rorippa curvisiliqua F. W. Peirson 1906-7-16 s.n. Los Angeles Los Angeles River, San Fernando Valley Comment
  RSA66112  Cardamine californica var. californica F. W. Peirson 1919-1-5 265 Los Angeles Sawpit Canyon or Monrovia Canyon. 579 Comment
  RSA66114  Cardamine californica var. integrifolia F. W. Peirson 1911 Los Angeles Arroyo Seco, Pasadena Comment
  RSA66149  Lepidium lasiocarpum F. W. Peirson 1932-4-17 9848 Los Angeles Near dam head, Lovejoy Buttes, Mohave Desert 762 Comment
  RSA66158  Erysimum capitatum var. capitatum F. W. Peirson 1921-3-3 337 Los Angeles Arroyo Seco just below entrance to canyon. 366 Comment
  RSA66174  Draba cuneifolia var. integrifolia F. W. Peirson 650 Los Angeles Sycamore Canyon, San Rafael Hills. Comment
  RSA66185  Eriogonum davidsonii F. W. Peirson 1927-6-29 7680 Los Angeles San Gabriel Mountains: trail to Strawvberry Peak, 2.5 mi. from Switzers 1128 Comment
  RSA66273  Eschscholzia caespitosa F. W. Peirson 1925-4-23 5801 Los Angeles Forks of San Gabriel River. 534 Comment
  RSA66290  Dicentra chrysantha F. W. Peirson 1922-7-29 4177 Los Angeles S slope of Mt. Pinos 1982 Comment
  RSA66309  Stylomecon heterophylla F. W. Peirson 1923-4-9 3445 Los Angeles San Clemente Island: 5 miles SE of Wilson's Cove Comment
  RSA66311  Fallopia convolvulus F. W. Peirson 1918-5-26 1800 Los Angeles Hennigers Flat, Mt. Wilson Toll Road 854 Comment
  RSA66323  Polygonum lapathifolium F. W. Peirson 1923-10-10 4160 Los Angeles Santa Clara River at crossing north of Saugus. Comment
  RSA66340  Eriogonum davidsonii F. W. Peirson 1919-7-29 18 Los Angeles Summit of Mt. Wilson, San Gabriel Mountains 1738 Comment
  RSA66483  Eriogonum brachyanthum F. W. Peirson 1928-9-4 8185 Los Angeles East of Palmdale. Comment
  RSA66504  Arabis glabra F. W. Peirson 1919-4-9 390 Los Angeles Rubio Canyon. 549 Comment
  RSA66531  Athysanus pusillus F. W. Peirson 1921-3-3 663 Los Angeles Arroyo Seco, near Pasadena 350 Comment
  RSA66597  Rorippa curvisiliqua F. W. Peirson 1906 Los Angeles Playa del Rey. Comment
  RSA66738  Eschscholzia caespitosa subsp. caespitosa F. W. Peirson 1921-7-16 2503 Los Angeles East fork of San Gabriel River. 1372 Comment
  RSA66754A  Caulanthus heterophyllus var. heterophyllus F. W. Peirson 1921-4-3 5333 Los Angeles Pacoima canyon, Western San Gabriel Mts. 488 Comment
  RSA66754B  Guillenia lasiophylla F. W. Peirson 1921-4-3 5333 Los Angeles Pacoima canyon, Western San Gabriel Mts. 488 Comment
  RSA66756  Caulanthus heterophyllus var. heterophyllus F. W. Peirson 1925-4-23 5786 Los Angeles Forks of San Gabriel River. 534 Comment
  RSA66789  Thysanocarpus laciniatus F. W. Peirson 1919-3-30 664 Los Angeles Tujunga Canyon. 457 Comment
  RSA67160  Galium nuttallii subsp. nuttallii F. W. Peirson 1919-3-11 2653 Los Angeles Small Canyon east of Rubio Canyon south base of San Gabriel Mtns. at 1800 ft. 549 Comment
  RSA67364  Guillenia lasiophylla F. W. Peirson 1923-4-12 3451 Los Angeles Wilson s Cove, San Clemente Island. Comment
  RSA67376  Guillenia lasiophylla F. W. Peirson 1919-5-14 4431 Los Angeles Eaton Canyon 762 Comment
  RSA68648  Calochortus kennedyi var. kennedyi Frank W. Peirson 1921-5-20 1667 Los Angeles Hills west of Little Rock Canyon and at least 150 feet above it. at 3700 ft. north slope of San Gabriel Mountains. 1128 Comment
  RSA68688  Muilla maritima F. W. Peirson 5 Los Angeles east bank of Arroyo Seco, Pasadena. Comment
  RSA68691  Muilla maritima F. W. Peirson 1923-5-26 4100 Los Angeles Rock Creek, north slope of San Gabriel Mountains. 1601 Comment
  RSA68729  Fritillaria biflora Frank W. Peirson 1676 Los Angeles Wash of Arroyo Seco, Pasadena Comment
  RSA68781  Delphinium parishii subsp. parishii F. W. Peirson 1917-5-13 640 Los Angeles Near Big Rock Creek, Mojave Desert; San Gabriel Mountains. Comment
  RSA68782  Delphinium parishii subsp. parishii F. W. Peirson 1929-7-1 8441 Los Angeles Mt. Pacifico: upper part of trail, San Gabriel Mountains. 1982 Comment
  RSA68784  Delphinium parishii subsp. parishii F. W. Peirson 1919-5-11 419 Los Angeles Arraster [Arrastre] Creek, San Gabriel Mountains. 915 Comment
  RSA68785  Delphinium parishii F. W. Peirson 1932-4-17 9854 Los Angeles Below the Lovejoy Dam, Lovejoy Buttes, Mojave Desert. 762 Comment
  RSA68975  Plantago erecta F. W. Peirson 1919-3-27 329 Los Angeles Arroyo Seco near Pasadena 412 Comment
  RSA68996  Anagallis arvensis F. W. Peirson 1921-02 s.n. Los Angeles Coldwater Canyon, Santa Monica Mts. Comment
  RSA69000  Samolus parviflorus F. W. Peirson 1918-08 s.n. Los Angeles San Fernando Valley, Los Angeles River. Comment
  RSA69024  Dodecatheon clevelandii subsp. clevelandii F. W. Peirson 1919-2-9 321 Los Angeles Fish Canyon, San Gabriel Mts. 305 Comment
Read comments
Dec 10 2014
  RSA69291  Chlorogalum pomeridianum var. pomeridianum Frank W. Peirson 1918-6-28 10 Los Angeles Rubio Canyon 610 Comment
  RSA69462  Mirabilis laevis var. retrorsa F. W. Peirson 1932-4-17 9846 Los Angeles Below the Lovejoy Dam, Lovejoy Buttes, Mojave Desert. 762 Comment
  RSA69489  Mirabilis laevis var. crassifolia F. W. Peirson 1923-4-8 3470 Los Angeles Wilson s Cove, San Clemente Island. Comment
  RSA69498  Mirabilis laevis var. crassifolia F. W. Peirson 1919-1-25 307 Los Angeles Arroyo Seco. 381 Comment
  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
  RSA69575  Mentzelia micrantha F. W. Peirson 1923-5-21 4450 Los Angeles Fish Canyon 534 Comment
  RSA69576  Mentzelia micrantha F. W. Peirson 1925-4-23 5797 Los Angeles Forks of San Gabriel River. 534 Comment
  RSA69593  Triglochin maritima F. W. Peirson 1918-08 1542 Los Angeles Long Beach Comment
  RSA69629  Juncus patens F. W. Peirson 1923-4-10 3416 Los Angeles San Clemente Island: canyon running south from summit. Comment
  RSA69689  Mentzelia montana F. W. Peirson 1921-6-18 2798 Los Angeles N Fork of San Gabriel River 1982 Comment
  RSA69691  Mentzelia albicaulis F. W. Peirson 1917-5-13 749 Los Angeles Near Big Rock Creek, Mojave Desert; San Gabriel Mountains. Comment
  RSA69705  Mentzelia veatchiana F. W. Peirson 1932-4-17 9862 Los Angeles 2 miles northeast of Lovejoy Buttes, Mohave Desert 762 Comment
  RSA69708  Mentzelia albicaulis F. W. Peirson 1932-4-17 9853 Los Angeles Below the Lovejoy Dam, Lovejoy Buttes, Mojave Desert. 762 Comment
  RSA69710  Mentzelia dispersa F. W. Peirson 1921-6-14 2466 Los Angeles Trail F of San Gabriel RiverSan Gabriel Mts. 976 Comment
  RSA69727  Lemna minor F. W. Peirson 1924-9-19 5269 Los Angeles Arroyo Seco, near Pasadena. 198 Comment
  RSA69861  Juncus torreyi F. W. Peirson 1928-9-4 8186 Los Angeles about 1 mile above Pallett Creek Comment
  RSA69908  Asclepias fascicularis F. W. Peirson 1918-8-16 149 Los Angeles San Gabriel Mtns: Camp Baldy. 1371 Comment
  RSA69920  Apocynum cannabinum F. W. Peirson 1918-6-18 146 Los Angeles Devil s Punch Bowl, Rock Creek Comment
  RSA69922  Apocynum androsaemifolium F. W. Peirson 1921-7-3 882 Los Angeles San Gabriel Mts., Hunt Canyon 3 mi E of Vincent 2011 Comment
  RSA69964  Abronia umbellata F. W. Peirson 1843 Los Angeles Long Beach Comment
  RSA70012  Amaranthus blitoides F. W. Peirson 1932-8-15 10416 Los Angeles Vacant lot at Walnut and Hill, Pasadena Comment
  RSA70017  Suaeda calceoliformis F. W. Peirson 1918-08 1828 Los Angeles Long Beach Comment
  RSA70157  Dichelostemma capitatum subsp. capitatum F. W. Peirson 1919-5-18 s.n. Los Angeles Hills east of Monrovia Canyon 457 Comment
  RSA70162  Dichelostemma capitatum subsp. capitatum F. W. Peirson 1923-4-12 3485 Los Angeles Wilson s Cove, San Clemente Island Comment
  RSA70167  Bloomeria crocea var. crocea F. W. Peirson 1922-6-3 3091 Los Angeles north slope at foot of Oak Grove Canyon, Mojave Desert. 976 Comment
  RSA70173  Allium fimbriatum var. fimbriatum F. W. Peirson 1926-5-6 6733 Los Angeles on open headland, about 1 mi. from Rock Creek on road to Los Angeles County Playgrounds. 1310 Comment
  RSA70196  Allium fimbriatum var. fimbriatum F. W. Peirson 1926-4-26 6661 Los Angeles 5 miles west of Rock Creek, Mohave Desert. Comment
  RSA70211  Allium campanulatum F. W. Peirson 1922-7-5 3192 Los Angeles Mescal Creek. 2027 Comment
  RSA70241  Allium praecox F. W. Peirson 1923-4-12 3486 Los Angeles Wilson s Cove, San Clemente Island Comment
  RSA70312  Juncus xiphioides F. W. Peirson 1928-9-4 8187 Los Angeles wet bank of irrigation ditch; Rock Creek about 1 mile above Pallett Creek Comment
  RSA70313  Juncus xiphioides F. W. Peirson 1921-5-20 2418 Los Angeles Little Rock Creek 1204 Comment
  RSA70314  Juncus xiphioides F. W. Peirson 1924-8-23 5058 Los Angeles west fork of San Gabriel River 411 Comment
  RSA70385  Euphorbia peplus F. W. Peirson 1921-4-8 2400 Los Angeles Coolidge Rare plant gardens, Santa Anita Road, Pasadena, CA. Comment
  RSA70397  Chamaesyce serpillifolia F. W. Peirson 1904-9-5 2035 Los Angeles La Canada Comment
  RSA70403  Chamaesyce serpillifolia subsp. serpillifolia F. W. Peirson 1921-6-20 2445 Los Angeles North Fork of San Gabriel River 457 Comment
  RSA70485  Oxalis albicans subsp. californica F. W. Peirson 1920-5-6 2126 Los Angeles Fish Canyon, San Gabriel Mountains. 274 Comment
  RSA70502  Geranium carolinianum F. W. Peirson 1919-5-18 437 Los Angeles Monrovia Canyon, south base of San Gabriel Mts. 457 Comment
  RSA70503  Geranium carolinianum F. W. Peirson 1921-6-20 8219 Los Angeles North Fork of San Gabriel River, San Gabriel Mts 762 Comment
  RSA70534  Chamaesyce melanadenia F. W. Peirson 1919-1-25 310 Los Angeles Arroyo Seco, near Pasadena 381 Comment
  RSA70545  Euphorbia spathulata F. W. Peirson 1908-4-18 2037 Los Angeles Point Fermin Comment
  RSA70586  Sisyrinchium bellum Frank W. Peirson 1919-5-18 444 Los Angeles Monrovia Canyon. 518 Comment
  RSA70994  Cuscuta californica var. californica F. W. Peirson 150 Los Angeles Hills near Monrovia Comment
  RSA71002  Cuscuta ceanothi F. W. Peirson 1924-10-26 5261 Los Angeles Arroyo Seco, about 0.5 mile below California Street, Pasadena, 198 Comment
  RSA71014  Cressa truxillensis F. W. Peirson 896 Los Angeles Banning Wharf, San Pedro. Comment
  RSA71120  Calystegia occidentalis subsp. fulcrata F. W. Peirson 1919-6-14 497 Los Angeles Rock Creek. 1905 Comment
  RSA71793  Saltugilia splendens subsp. grantii F. W. Peirson 1927-6-14 7345 Los Angeles San Antonio Canyon, San Gabriel Mountains. 823 Comment
  RSA71795  Saltugilia splendens subsp. grantii F. W. Peirson 1921-6-19 4707 Los Angeles North Fork of San Gabriel River 1296 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
  RSA71818  Gilia capitata subsp. abrotanifolia F. W. Peirson 1923-5-21 4705 Los Angeles South face of San Gabriel Mountains. Fish Canyon 792 Comment
  RSA71823  Gilia splendens subsp. splendens F. W. Peirson 1921-7-3 2485 Los Angeles on trail northeast of Rock Creek divide Comment
  RSA71842  Gilia latiflora subsp. latiflora F. W. Peirson 1917-5-13 1950 Los Angeles Near Little Rock, Mojave Desert. Comment
  RSA71901  Gilia capitata subsp. abrotanifolia F. W. Peirson 1903-3-28 916 Los Angeles Benedict's Canyon, Santa Monica Mountains. Comment
  RSA71948  Collomia grandiflora F. W. Peirson 1924-4-28 4634 Los Angeles Hoyt Ranch, Tujunga Creek, W end of San Gabriel Mts. 579 Comment
  RSA72012  Phlox diffusa F. W. Peirson 1922-7-6 3179 Los Angeles Blue Ridge, near Swartout Valley. 2287 Comment
  RSA72081  Microsteris gracilis F. W. Peirson 1921-7-3 2484 Los Angeles East end of Pinyon Ridge, San Gabriel Mountains 2287 Comment
  RSA72137  Gayophytum heterozygum F. W. Peirson 1921-7-3 2483 Los Angeles San Gabriel Mts., upper trail, Vicent Gulch. 1982 Comment
  RSA72187  Epilobium glaberrimum subsp. glaberrimum F. W. Peirson 1920-9-14 4454 Los Angeles Ridge west of Coldwater Creek, near a spring. 2363 Comment
  RSA72220  Gaura sinuata F. W. Peirson 1920-6-13 2160 Los Angeles Altadena, at northwest corner of N.Y. Ave. and Maiden Lane. Comment
  RSA72289  Gilia angelensis F. W. Peirson 1919-4-5 4706 Los Angeles Allen Ranch, Altadena. 366 Comment
  RSA72293  Gilia angelensis F. W. Peirson 1919-3-30 919 Los Angeles Tujunga Canyon. West end of San Gabriel Mts. 427 Comment
  RSA72312  Gilia diegensis F. W. Peirson 1919-4-19 385 Los Angeles Pacoima Canyon 548 Comment
  RSA72324  Gilia malior F. W. Peirson 1932-4-17 9861 Los Angeles 2 miles northeast of Lovejoy Buttes, Mohave Desert 762 Comment
  RSA72644  Wyethia ovata F. W. Peirson 1929-7-1 8437 Los Angeles along small stream depression on north slope just below summit of ridge; Mt. Pacifico 2072 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
  RSA73033  Leptosiphon breviculus F. W. Peirson 1922-7-5 4709 Los Angeles 0.5 mile east of Big Pines, San Gabriel Mtns. 2027 Comment
  RSA73035  Leptosiphon breviculus F. W. Peirson 1924-5-27 4633 Los Angeles Strawberry Peak, San Gabriel Mountains. Comment
  RSA73036  Leptosiphon breviculus F. W. Peirson 1921-6-19 937 Los Angeles North Fork of San Gabriel River. 1646 Comment
  RSA73042  Leptosiphon parviflorus F. W. Peirson 1919-5-18 4711 Los Angeles Hills east of Monrovia Canyon 457 Comment
  RSA73049  Leptosiphon parviflorus F. W. Peirson 1919-4-19 377 Los Angeles Pacoima Canyon, west end of San Gabriel Mts. 579 Comment
  RSA73055  Leptosiphon lemmonii F. W. Peirson 1920-4-26 2111 Los Angeles Santa Anita Wash above Foothill Blvd. 213 Comment
  RSA73079  Leptosiphon liniflorus F. W. Peirson 1919-6-7 456 Los Angeles Divide between Cow Canyon and San Antonio canyon. 1372 Comment
  RSA73130  Navarretia hamata subsp. hamata F. W. Peirson 1917-5-14 949 Los Angeles San Gabriel River was at foothill Boulevard Comment
  RSA73282  Linanthus pungens F. W. Peirson 1922-5-30 3092 Los Angeles West spur of Mt. Lowe, San Gabriel Mountains. 1311 Comment
  RSA73314  Oenothera rosea F. W. Peirson 1934-4-14 11144 Los Angeles Jannoch Nurseries, northwestern part of Pasadena Comment
  RSA73331  Clarkia epilobioides F. W. Peirson 1921-4-21 47025 Los Angeles Trail to Sycamore Flat, San Gabriel Mountains. 530 Comment
  RSA73333  Clarkia epilobioides F. W. Peirson 1905-5-22 772 Los Angeles Arroyo Seco, Pasadena. Comment
  RSA73359  Clarkia rhomboidea F. W. Peirson 1920-6-10 2161 Los Angeles San Gabriel Mountains, trail along west slope of Mt. Markham 1646 Comment
  RSA73681  Leptosiphon aureus subsp. aureus F. W. Peirson 1919-3-30 343 Los Angeles Tujunga Canyon. West end of San Gabriel Mts. 427 Comment
  RSA74168  Phacelia ciliata F. W. Peirson 1903-2-14 967 Los Angeles Road to Pasadena from Los Angeles. Comment
  RSA74187  Phacelia cicutaria var. hispida F. W. Peirson 1921-6-19 161 Los Angeles North Fork of San Gabriel River. 1006 Comment
  RSA74489  Phacelia grandiflora F. W. Peirson 1925-4-23 5809 Los Angeles San Gabriel River 305 Comment
  RSA74502  Phacelia minor F. W. Peirson 1925-4-23 5792 Los Angeles forks of San Gabriel River, San Gabriel Mts. 534 Comment
  RSA74792  Phacelia parryi F. W. Peirson 1918-5-4 976 Los Angeles Summit of Santa Monica Range, above Brents on the Malibu Comment
  RSA74794  Phacelia F. W. Peirson 1930-5-12 8788 Los Angeles on detritus from canyon wall, in lower part of Mint Canyon, NW of San Gabriel Mts Comment
  RSA74931  Phacelia distans F. W. Peirson 1932-4-17 9866 Los Angeles Below Lovejoy Dam, Lovejoy Buttes, SW Mojave Desert. 762 Comment
  RSA74984  Phacelia distans F. W. Peirson 1921-6-19 2825 Los Angeles North Fork of San Gabriel River. 1006 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
  RSA75344  Phacelia bicolor F. W. Peirson 1933-5-13 10664 Los Angeles About 10 miles south of Munroc, Western Mojave Desert. Comment
  RSA75353  Phacelia fremontii F. W. Peirson 1926-4-26 6651 Los Angeles Foot of grade north of Vincent on Palmdale road. Comment
  RSA75384  Camissonia strigulosa F. W. Peirson 1951-5-13 344 Los Angeles Arroyo Seco, Pasadena. Comment
  RSA75391  Oenothera deltoides subsp. deltoides F. W. Peirson 1932-4-17 9845 Los Angeles Below the Lovejoy Dam, Lovejoy Buttes, Mojave Desert. 762 Comment
  RSA75433  Camissonia ignota F. W. Peirson 1919-3-30 414 Los Angeles Tujunga Canyon, west end of San Gabriel Mountains. 457 Comment
  RSA75502  Phacelia brachyloba F. W. Peirson 1925-4-23 5793 Los Angeles forks of San Gabriel River, San Gabriel Mts. 534 Comment
  RSA75507  Phacelia brachyloba F. W. Peirson 965 Los Angeles Las Flores Canyon; San Gabriel Mts. Comment
  RSA75525  Phacelia fremontii F. W. Peirson 1917-5-13 963 Los Angeles Near Little Rock, Mojave Desert. Comment
  RSA75867  Nemophila menziesii var. integrifolia F. W. Peirson 1920-5-1 166 Los Angeles Idle Hour Camp, Eaton Canyon. 732 Comment
  RSA75883  Nemophila menziesii var. integrifolia F. W. Peirson 1921-6-13 2738 Los Angeles Ranger s cabin, west fork of San Gabriel River. 960 Comment
  RSA75931  Phacelia austromontana F. W. Peirson 1921-7-3 2486 Los Angeles on trail northeast of Rock Creek divide Comment
  RSA75982  Eucrypta chrysanthemifolia F. W. Peirson 1921-02 167 Los Angeles Coldwater Canyon, Santa Monica Mts. Comment
  RSA75984  Eucrypta chrysanthemifolia F. W. Peirson 1930-5-30 8902 Los Angeles Mint Canyon 610 Comment
  RSA76282  Eriastrum sapphirinum subsp. sapphirinum F. W. Peirson 1922-7-7 4128 Los Angeles Sheep Creek. North base of San Gabriel Mountains. 1448 Comment
  RSA77062  Loeseliastrum matthewsii F. W. Peirson 1919-6-15 468 Los Angeles Rock Creek, San Gabriel Mts. 1280 Comment
  RSA77065  Loeseliastrum matthewsii F. W. Peirson 1917-5-13 2830 Los Angeles West of Little Rock. Comment
  RSA77155  Ceanothus leucodermis F. W. Peirson 1920-4-18 2107 Los Angeles New York St., La Canada. 610 Comment
  RSA77181  Modiola caroliniana F. W. Peirson 2052 Los Angeles Wilson s Lake, Altadena 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
  RSA77435  Angelica tomentosa F. W. Peirson 1921-7-19 2508 Los Angeles Cow Canyon, Tributary of East Fork of San Gabriel River 914 Comment
  RSA77639  Marah macrocarpa var. major F. W. Peirson 1923-4-9 3480 Los Angeles San Clemente Island: 5 miles SE of Wilson's Cove Comment
  RSA77726  Viola purpurea subsp. purpurea F. W. Peirson 1920-5-28 2671 Los Angeles Bear Canyon, San Gabriel Mts. 1402 Comment
  RSA77785  Lythrum californicum F. W. Peirson 1920-9-5 291 Los Angeles Eaton Canyon, south base of San Gabriel Mountains. 457 Comment
  RSA77793  Ammannia coccinea F. W. Peirson 1918-08 2079 Los Angeles Long Beach Comment
  RSA77809  Pholisma arenarium F. W. Peirson 1904-8-22 1177 Los Angeles Playa del Rey, coast of Los Angeles Co. Comment
  RSA77838  Tribulus terrestris F. W. Peirson 1918-6-15 2028 Los Angeles Along railroad, Saugus. Comment
  RSA77872  Pectocarya penicillata F. W. Peirson 1919-3-26 324 Los Angeles vacant lot on south side of New York Drive, east of Hill Ave., Altadena. Comment
  RSA77877  Heliotropium curassavicum F. W. Peirson 1923-5-27 3542 Los Angeles Pallett Creek, tributary to Rock Creek, north slope of San Gabriel Mts. 1097 Comment
  RSA79502B  Solanum rostratum F. W. Peirson 1906-7-19 1081 Los Angeles Sink near Inglewood. Comment
  RSA79568  Cryptantha intermedia F. W. Peirson 1919-2-12 320 Los Angeles Hills west of Arroyo Seco, near Pasadena 427 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
  RSA80075  Mimulus floribundus F. W. Peirson 1916-06 1123 Los Angeles Arroyo Seco, near Pasadena Comment
  RSA80135  Mimulus guttatus F. W. Peirson 1904-8-28 1128 Los Angeles Little Santa Anita Canyon, San Gabriel Mountains. Comment
  RSA80136  Mimulus guttatus F. W. Peirson 1903-4-2 1126 Los Angeles Ditch near Elysian Park, Los Angeles. Comment
  RSA80137  Mimulus guttatus F. W. Peirson 1918-6-28 259 Los Angeles Sierra Madre trail to Mt. Wilson, San Gabriel Mountains 838 Comment
  RSA80168  Collinsia heterophylla F. W. Peirson 1920-3-28 192 Los Angeles side canyon out of Tujunga Canyon, western end of San Gabriel Mts 473 Comment
  RSA80170  Collinsia heterophylla F. W. Peirson 1921-6-21 4492 Los Angeles west fork of San Gabriel River 762 Comment
  RSA80189  Antirrhinum coulterianum F. W. Peirson 1926-4-26 6644 Los Angeles East of stream bed in pacoima Wash Comment
  RSA80210  Plagiobothrys arizonicus F. W. Peirson 1934-3-11 11105 Los Angeles Antelope Buttes, 14 miles W of Lancaster, Mojave Desert Comment
  RSA80235  Castilleja exserta subsp. exserta F. W. Peirson 1917-5-13 1163 Los Angeles Little Rock, north base of San Gabriel Mts. Comment
  RSA80237  Orthocarpus purpurascens var. ornatus F. W. Peirson 1932-4-17 9852 Los Angeles Below the Lovejoy Dam, Lovejoy Buttes, Mojave Desert. 762 Comment
  RSA80289  Cryptantha muricata var. jonesii F. W. Peirson 1929-7-1 8427 Los Angeles On roadside and in clearing about old mill; Aliso Creek at Tie Canyon. 1341 Comment
  RSA80370  Solanum umbelliferum F. W. Peirson 185 Los Angeles Sink at Inglewood. Comment
  RSA80399  Daucus pusillus F. W. Peirson 1920-5-3 2311 Los Angeles Little Tujunga Wash, shortly above the junction with main stream, San Fernando Valley. 335 Comment
  RSA80447  Mimulus guttatus F. W. Peirson 1923-4-10 3471 Los Angeles 5 mi. SE of Wilson Cove. Canyon about 5 mi. southeast of Eagle Ranch, San Clemente Island. Comment
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May 16 2008
  RSA80463  Mimulus guttatus F. W. Peirson 1920-5-6 2125 Los Angeles Fish Canyon, San Gabriel Mountains 610 Comment
  RSA80465  Mimulus guttatus F. W. Peirson 1918-5-19 197 Los Angeles Trail to Dawn Station above Dawn Mine, San Gabriel Mountains. Comment
  RSA80487  Mimulus rubellus F. W. Peirson 1923-5-26 3527 Los Angeles Above Rock Creek Divide, north side of San Gabriel Mountains. 2073 Comment
  RSA80647  Boisduvalia glabella F. W. Peirson 1906-7-19 2083 Los Angeles Sink near Inglewood. Comment
  RSA80736  Cryptantha microstachys F. W. Peirson 1919-2-12 172 Los Angeles Hills west of Arroyo Seco, near Pasadena 427 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
  RSA80766  Petunia parviflora F. W. Peirson 1092 Los Angeles Los Angeles River, Inglewood. Comment
  RSA80831  Pedicularis densiflora F. W. Peirson 1168 Los Angeles Franklyn Canyon. Comment
  RSA80832  Pedicularis densiflora F. W. Peirson 1921-4-21 2363 Los Angeles Sycamore Flat Ridge, San Gabriel Mtns. 854 Comment
  RSA81463  Castilleja applegatei subsp. martinii F. W. Peirson 1922-7-6 3182 Los Angeles Covering large areas of Blue Ridge, east end of San Gabriel Mts. near line between Los Angeles and San Bernardino counties. 2439 Comment
  RSA81490  Castilleja linariifolia F. W. Peirson 1921-7-2 2478 Los Angeles Pallett Creek, north base of San Gabriel Mountains. 1098 Comment
  RSA82051  Cordylanthus rigidus subsp. setiger F. W. Peirson 1918-8-6 255 Los Angeles Mt. Wilson Toll Road 869 Comment
  RSA82077  Orobanche fasciculata F. W. Peirson 1929-7-1 8436 Los Angeles One small colony on firebreak, Aliso Creek, San Gabriel Mtns. 1585 Comment
  RSA82196  Trichostema lanceolatum F. W. Peirson 1919-11-16 1041 Los Angeles field west of Hollister Ave. Altadena. 381 Comment
  RSA82213  Verbena bracteata F. W. Peirson 1921-5-18 1038 Los Angeles along irrigatioon ditch, Mennig Ranch Palmdale Comment
  RSA82223  Verbena lasiostachys var. lasiostachys F. W. Peirson 1919-7-1 175 Los Angeles Montovia Canyon, south base of San Gabriel Mountains. 381 Comment
  RSA82277  Castilleja foliolosa F. W. Peirson 208 Los Angeles Foothills near Millard's Canyon, San Gabriel Mountains. Comment
  RSA82392  Salvia carduacea F. W. Peirson 1921-5-18 1059 Los Angeles Along railroad track, 3 miles east of Saugus. Comment
  RSA82526  Verbascum virgatum F. W. Peirson 1919-11-16 1097 Los Angeles East end of New York Ave., Altadena. Comment
  RSA82999  Salvia columbariae F. W. Peirson 1919-3-30 335 Los Angeles Hills west of the Arroyo Seco, west of Pasadena 427 Comment
  RSA83324  Dudleya lanceolata F. W. Peirson s.n. Los Angeles Altadena. Comment
  RSA83378  Dudleya lanceolata F. W. Peirson 1925-4-23 5810 Los Angeles San Gabriel River 365 Comment
  RSA83454  Mentha spicata F. W. Peirson 1077 Los Angeles San Fernando Valley. Comment
  RSA83928  Ranunculus californicus F. W. Peirson 1918-4-28 1871 Los Angeles Turnbull Canyon near Whittier, Puente Hills. Comment
  RSA83929  Ranunculus californicus F. W. Peirson 1921-2-26 2675 Los Angeles Topango Canyon, Santa Monica Mts. 305 Comment
  RSA83967  Saxifraga californica F. W. Peirson s.n. Los Angeles Weed AT 1085 New York Drive, Altadena. Comment
  RSA84262  Azolla filiculoides Frank W. Peirson 1924-10-26 5257 Los Angeles Arroyo Seco, about 0.5 mile below California Street, Pasadena, 198 Comment
  RSA84264  Ranunculus aquatilis var. capillaceus F. W. Peirson 1923-6-9 4304 Los Angeles Bouquet Canyon, northwest part of San Gabriel Mts. 762 Comment
  RSA84371  Lithophragma affine subsp. mixtum F. W. Peirson s.n. Los Angeles Nichols Canyon. Comment
  RSA84372  Lithophragma bolanderi F. W. Peirson 1918-5-21 69 Los Angeles Arroyo Seco near Pasadena 457 Comment
  RSA84868  Ranunculus cymbalaria var. saximontanus F. W. Peirson 1951-1 s.n. Los Angeles Near Long Beach Comment
  RSA84910  Crassula connata F. W. Peirson 1920-4-26 2112 Los Angeles Santa Anita Wash, S base of San Gabriel Mts. 213 Comment
  RSA84997  Dryopteris arguta F. W. Peirson 1906-7-24 s.n. Los Angeles Verdugo Mountains Comment
  RSA85005  Adiantum capillus-veneris F. W. Peirson 1921-3-6 2586 Los Angeles San Gabriel Mountains, east of Fish Creek. 229 Comment
  RSA85028  Pellaea andromedifolia var. andromedifolia F. W. Peirson 1919-12-2 1513 Los Angeles West Fork of Rubio Canyon, south base of San Gabriel Mtns 762 Comment
  RSA85045  Dryopteris arguta F. W. Peirson 1919-12-2 1506 Los Angeles West Fork of Rubio Canyon, south base of San Gabriel Mtns 762 Comment
  RSA85046  Pteridium aquilinum var. pubescens F. W. Peirson 1923-5-21 3510 Los Angeles Fish Canyon, south base of San Gabriel Mountains 762 Comment
  RSA85193  Sparganium erectum subsp. stoloniferum F. W. Peirson 1919-07 1534 Los Angeles Ballona Marsh. Comment
  RSA85547  Cheilanthes covillei F. W. Peirson 1921-5-3 2404 Los Angeles Bear Canyon Ridge west of Mt. Lowe 1219 Comment
  RSA85549  Aspidotis californica F. W. Peirson 1920-4-26 4296 Los Angeles Santa Anita Wash, S base of San Gabriel Mts. 213 Comment
  RSA85550  Cheilanthes covillei F. W. Peirson 1921-10-22 4297 Los Angeles San Gabriel Mountains, trail from San Gabriel Peak to Mt. Wilson. 1524 Comment
  RSA85557  Aspidotis californica F. W. Peirson 1919-11-30 1525 Los Angeles South base of San Gabriel Mnts., Middle Eaton Canyon. 610 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
  RSA85795  Drymocallis glandulosa var. reflexa F. W. Peirson 1918-6-1 4276 Los Angeles Henniger's Flats, San Gabriel Mts 854 Comment
  RSA86196  Cystopteris fragilis F. W. Peirson 1919-5-14 1523 Los Angeles west fork of Eaton Canyon, south base of San Gabriel Mts. 1066 Comment
  RSA86271  Pellaea mucronata var. mucronata F. W. Peirson 1919-12-2 1514 Los Angeles West Fork of Rubio Canyon, south base of San Gabriel Mtns 762 Comment
  RSA86941  Lupinus truncatus F. W. Peirson 1919-3-26 360 Los Angeles New York Drive and Holliston, Altadena, Alt 1150ft 351 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
  RSA86969  Lupinus sparsiflorus subsp. sparsiflorus F. W. Peirson 1919-2-12 87 Los Angeles Hills west of the lower Arroyo Seco, west of Pasadena 396 Comment
  RSA87113  Galium angustifolium subsp. angustifolium F. W. Peirson 1918-6-28 213 Los Angeles Foothills of Mt. Lowe, near Rubio Canyon 610 Comment
  RSA87140  Lupinus hirsutissimus F. W. Peirson 1920-3-28 86 Los Angeles Field at foot of Tujunga Canyon, west end of San Gabriel Mountains 441 Comment
  RSA87207  Lupinus andersonii F. W. Peirson 1923-8-31 4030 Los Angeles Blue Ridge, eastern San Gabriel Mountains near line between Los Angeles and San Bernardino counties. 2591 Comment
  RSA87314  Lupinus concinnus F. W. Peirson 1919-5-11 2436 Los Angeles Arraster [Arrastre] Creek, north slope of San Gabriel Mts. 853 Comment
  RSA87316  Lupinus concinnus F. W. Peirson 1923-4-10 3426 Los Angeles South slope Canyon close below Summit Plateau, San Clemente Island Comment
  RSA87415  Lupinus latifolius subsp. parishii F. W. Peirson 1903-4-11 464 Los Angeles Nichol Canyon, Santa Monica Mts Comment
  RSA88649  Carex barbarae F. W. Peirson 1920-5-8 2685 Los Angeles San Rafael Hills, west of Arroyo Seco. Comment
  RSA88718  Carex alma F. W. Peirson 1918-5-21 1636 Los Angeles Canyon of Arroyo Seco, near Pasadena. Comment
  RSA88742  Carex hassei F. W. Peirson 1922-7-7 3171 Los Angeles Ranger's Cabin, Swartout Valley. 1799 Comment
  RSA88854  Carex tumulicola F. W. Peirson 1923-4-10 3417 Los Angeles San Clemente Island: canyon running south from summit. Comment
  RSA88867  Carex praegracilis F. W. Peirson 1932-4-17 9860 Los Angeles Below Lovejoy Dam, Lovejoy Buttes, southwestern Mojave Desert. 762 Comment
  RSA90045  Lotus argophyllus subsp. ornithopus F. W. Peirson 1923-4-9 3468 Los Angeles San Clemente Island: about 2 miles SE of Wilson's cove Comment
  RSA90047  Lotus argophyllus var. argophyllus F. W. Peirson 95 Los Angeles summit of Mt. Wilson Comment
  RSA90067  Lotus argophyllus var. argophyllus F. W. Peirson 1921-5-12 4091 Los Angeles Big Santa Anita Canyon, S base of San Gabriel Mts 762 Comment
  RSA90151  Astragalus didymocarpus var. didymocarpus F. W. Peirson 1920-3-28 2102 Los Angeles Low hill at foot of Tujunga Canyon, west end of San Gabriel Mtns. 457 Comment
  RSA90157  Astragalus didymocarpus var. didymocarpus F. W. Peirson 1918-5-5 581 Los Angeles West foot of Santa Susanna Grade, Simi Valley. Comment
  RSA90161  Astragalus didymocarpus var. dispermus F. W. Peirson 1929-5-11 398 Los Angeles Arraster Creek, north slope of San Gabriel Mtns. 854 Comment
  RSA90175  Astragalus lentiginosus var. variabilis F. W. Peirson 1922-7-7 3194 Los Angeles Ranger's Cabin, Swartout Valley. 1799 Comment
  RSA90185  Astragalus brauntonii F. W. Peirson 1917-5-1 592 Los Angeles Topanga Canyon, Santa Monica Mountains. Comment
  RSA90211  Astragalus trichopodus var. phoxus F. W. Peirson 1917-5-1 578 Los Angeles Topanga Canyon, Santa Monica Mountains. Comment
  RSA90226  Astragalus douglasii var. douglasii F. W. Peirson 1918-6-16 582 Los Angeles Rock Creek, north slope of San Gabriel Mountains 1448 Comment
  RSA90269  Polypogon viridis F. W. Peirson 1918-6-16 1581 Los Angeles Rock Creek, north slope of San Gabriel Mountains 1448 Comment
  RSA90271  Polypogon viridis F. W. Peirson 1922-7-5 5360 Los Angeles Swartout Valley 1 mile east of Big Pines, north slope of San Gabriel Mountains. Comment
  RSA90276  Lathyrus vestitus var. vestitus F. W. Peirson 1924-5-26 4627 Los Angeles trail to Switzer's Camp 915 Comment
  RSA90278  Lathyrus vestitus var. vestitus F. W. Peirson 1919-3-11 104 Los Angeles first canyon east of Rubio Canyon 549 Comment
  RSA90279  Lathyrus vestitus var. vestitus F. W. Peirson 1919-4-19 374 Los Angeles Pacoima Canyon, west end of San Gabriel Mountains. 671 Comment
  RSA90280  Lathyrus vestitus var. vestitus F. W. Peirson 1920-5-16 2137 Los Angeles Tujunga Canyon, west end of San Gabriel Mountains. 473 Comment
  RSA90293  Lotus grandiflorus var. grandiflorus F. W. Peirson 1924-5-27 4635 Los Angeles Tujunga canyon 762 Comment
  RSA90299  Lotus hamatus F. W. Peirson 1920-5-3 2117 Los Angeles Little Tujunga Wash, west end of San Gabriel Mts. 335 Comment
  RSA90313  Lotus salsuginosus var. salsuginosus F. W. Peirson 1925-4-23 5795 Los Angeles Forks of San Gabriel River. 534 Comment
  RSA90322  Lotus humistratus F. W. Peirson 1919-5-11 406 Los Angeles Arraster [Arrastre] Creek, north slope of San Gabriel Mts. 854 Comment
  RSA90348  Lathyrus vestitus var. vestitus F. W. Peirson 1921-5-12 4691 Los Angeles Big San Anita Trail 762 Comment
  RSA90350  Lathyrus vestitus subsp. laetiflorus F. W. Peirson 1920-4-25 1926 Los Angeles Hills west of Arroyo Seco, near Pasadena 426 Comment
  RSA90352  Lotus crassifolius var. crassifolius F. W. Peirson 1905-7-14 4078 Los Angeles Bear Flat Comment
  RSA90354  Lotus crassifolius var. crassifolius F. W. Peirson 1923-5-26 4075 Los Angeles Rock Creek, north slope of San Gabriel Mountains. 1890 Comment
  RSA90360  Lotus nevadensis var. davidsonii F. W. Peirson 1922-7-5 4089 Los Angeles Big Pines Camp 2104 Comment
  RSA90362  Lotus nevadensis var. davidsonii F. W. Peirson 1929-7-1 8447 Los Angeles Mt. Pacifico: upper part of trail, San Gabriel Mountains. 1982 Comment
  RSA90367  Lotus heermannii F. W. Peirson 1918-5-21 99 Los Angeles Wet place near stream; Arroyo Seco, near Pasadena 518 Comment
  RSA90369  Lotus heermannii var. heermannii F. W. Peirson 1919-7-1 510 Los Angeles South base of San Gabriel Mtns, Fish Canyon. 457 Comment
  RSA90375  Lotus grandiflorus var. grandiflorus F. W. Peirson 1919-7-3 4067 Los Angeles Lukens Peak 1220 Comment
  RSA90383  Lotus strigosus F. W. Peirson 1919-3-27 351 Los Angeles Arroyo Seco, near Pasadena 396 Comment
  RSA90385  Lotus strigosus F. W. Peirson 1919-2-12 97 Los Angeles Field near foot of Lukens Trail, San Gabriel Mountains. 610 Comment
  RSA90386  Lotus strigosus F. W. Peirson 1918-5-26 322 Los Angeles Hennigers Flat, Mt. Wilson Toll Road 854 Comment
  RSA90391  Lotus strigosus F. W. Peirson 1920-5-9 4693 Los Angeles east trail to Mt. Lowe 1341 Comment
  RSA90414  Lotus oblongifolius var. oblongifolius F. W. Peirson 1921-7-2 4080 Los Angeles Pallett Creek, San Gabriel Mountains 1098 Comment
  RSA90422  Lotus strigosus F. W. Peirson 1921-6-20 4076 Los Angeles N fork San Gabriel River 914 Comment
  RSA90424  Lotus micranthus F. W. Peirson 1919-5-18 436 Los Angeles South slope of San Gabriel Mountains. Monrovia Canyon. 427 Comment
  RSA90454  Lathyrus vestitus var. vestitus F. W. Peirson 1919-11-17 s.n. Los Angeles hills east of Rubio Canyon 640 Comment
  RSA90458  Lathyrus vestitus subsp. laetiflorus F. W. Peirson 1923-4-11 3455 Los Angeles San Clemente Island, canyon about 5 miles southeast of Eagle Ranch Comment
  RSA90643  Hazardia squarrosa F. W. Peirson 1922-9-14 4739 Los Angeles San Antonio Canyon. 1067 Comment
  RSA90645  Hazardia squarrosa var. grindelioides F. W. Peirson 1921-10-9 5299 Los Angeles Tujunga Canyon, west end of San Gabriel Mountains. 488 Comment
  RSA90687  Gutierrezia californica F. W. Peirson 1919-10-16 277 Los Angeles end of road in Pacoima Canyon 457 Comment
  RSA90690  Gutierrezia sarothrae F. W. Peirson 1920-5-12 2130 Los Angeles Foothill Blvd. San Gabriel Wash, S base of San Gabriel Mts. 182 Comment
  RSA90708  Astragalus trichopodus var. lonchus F. W. Peirson 1921-2-26 586 Los Angeles Foot of Topanga Canyon, Santa Monica Mtns. Comment
  RSA90849  Carex senta F. W. Peirson 1921-5-20 2658 Los Angeles Little Rock Creek 1067 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
  RSA90858  Carex triquetra F. W. Peirson 1918-6-4 1635 Los Angeles Foothills east of Rubio Canyon 609 Comment
  RSA90863  Carex alma F. W. Peirson 1923-5-25 3526 Los Angeles along stream on south side of canyon of Rock Creek, San Gabriel Mountains. 1296 Comment
  RSA90865  Carex alma F. W. Peirson 1929-5-31 8407 Los Angeles Los Angeles-San Bernardino counties. San Antonio Canyon, San Gabriel Mountains. between Los Angeles and San Bernardino Counties. 2134 Comment
  RSA90890  Ericameria parishii var. parishii F. W. Peirson 225 Los Angeles Above Martins Camp, Mt. Wilson, San Gabriel Mts. 1601 Comment
  RSA90911  Chrysothamnus nauseosus subsp. mohavensis F. W. Peirson 1919-8-30 1250 Los Angeles Rosamond, Antelope Valley Comment
  RSA90912  Chrysothamnus nauseosus subsp. mohavensis F. W. Peirson 1928-9-5 8192 Los Angeles road from Rock Creek to Big Pines 1280 Comment
  RSA90917  Ericameria pinifolia F. W. Peirson 1918-10-16 223 Los Angeles Pacoima Canyon 518 Comment
  RSA90939  Trifolium fucatum F. W. Peirson 1918-4-28 554 Los Angeles Turnbull Canyon near Whittier, Puente Hills. Comment
  RSA90956  Erigeron divergens F. W. Peirson 1921-7-16 2500 Los Angeles Prairie Fork of the San Gabriel River 1555 Comment
  RSA90985  Trifolium wormskioldii F. W. Peirson 1919-6-15 485 Los Angeles Rock Creek. San Gabriel Mtns. 1296 Comment
  RSA91007  Conyza canadensis F. W. Peirson 1919-09 273 Los Angeles Weed at 1085 New York Drive, Altadena Comment
  RSA91015  Trifolium wormskioldii F. W. Peirson 1930-5-31 8915 Los Angeles Below Lovejoy Dam. Lovejoy Buttes. SW Mojave Desert. Comment
  RSA91030  Erigeron foliosus var. stenophyllus F. W. Peirson 1920-5-12 231 Los Angeles Foothill Blvd. San Gabriel Wash, S base of San Gabriel Mts. 182 Comment
  RSA91034  Erigeron foliosus F. W. Peirson 1903-1 1288 Los Angeles Elysian Park, Los Angeles, Southern California Comment
  RSA91093  Trifolium variegatum F. W. Peirson 1921-5-19 560 Los Angeles Little Rock Creek 945 Comment
  RSA91107  Trifolium obtusiflorum F. W. Peirson 1919-7-1 485 Los Angeles Fish Canyon, San Gabriel Mts. 305 Comment
  RSA91108  Trifolium obtusiflorum F. W. Peirson 1921-6-20 564 Los Angeles N fork San Gabriel River 914 Comment
  RSA91109  Trifolium obtusiflorum F. W. Peirson 1921-4-3 5211 Los Angeles Pacoima Canyon, W end of San Gabriel Mts 686 Comment
  RSA91119  Trifolium monanthum var. monanthum F. W. Peirson 1919-6-16 92 Los Angeles S Fork of Rock Creek, San Gabriel Mts. 1982 Comment
  RSA91127  Trifolium microcephalum F. W. Peirson 1923-4-9 3435 Los Angeles San Clemente Island: 2 miles SE of Wilsons Cove Comment
  RSA91130  Trifolium microcephalum F. W. Peirson 1919-5-18 5208 Los Angeles Monrovia Canyon, south base of San Gabriel Mts. 457 Comment
  RSA91195  Lupinus formosus var. formosus F. W. Peirson 1920-5-14 4695 Los Angeles Arroyo Seco, near Pasadena 518 Comment
  RSA91196  Lupinus formosus var. formosus F. W. Peirson 1919-5-10 4 Los Angeles Arraster Creek 915 Comment
  RSA91204  Lupinus formosus var. formosus F. W. Peirson 1907-7-7 3 Los Angeles pine Flats 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
  RSA91233  Alnus rhombifolia F. W. Peirson 1919-1-5 301 Los Angeles Monrovia Canyon, San Gabriel Mountains 579 Comment
  RSA91252  Lupinus breweri var. grandiflorus F. W. Peirson 1921-6-16 2441 Los Angeles Summit of Mt. Waterman, San Gabriel Mountains 2317 Comment
  RSA91269  Lupinus longifolius F. W. Peirson 1921-4-10 2475 Los Angeles Sycamore Flat Ridge, San Dimas region, San Gabriel Mts 854 Comment
  RSA91271  Isocoma acradenia F. W. Peirson 1919-8-30 1255 Los Angeles Desert between Mojave and Lancaster. Comment
  RSA91273  Isocoma menziesii var. vernonioides F. W. Peirson 1921-11-11 2596 Los Angeles Saugus at northwest base of San Gabriel Mtns. Comment
  RSA91275  Isocoma menziesii var. vernonioides F. W. Peirson 1924-10-19 5227 Los Angeles Clearwater. 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
  RSA91285  Lessingia glandulifera var. glandulifera F. W. Peirson 1921-7-19 1260 Los Angeles At forks of Coldwater Canyon and Cattle Canyon, East Fork San Gabriel Canyon 793 Comment
  RSA91295  Lessingia glandulifera var. glandulifera F. W. Peirson 1918-10-17 278 Los Angeles Pacoima Valley, west end of San Gabriel River 457 Comment
  RSA91296  Alnus rhombifolia F. W. Peirson 1924-8-23 5047 Los Angeles west fork of San Gabriel River 411 Comment
  RSA91305  Vicia americana var. americana F. W. Peirson 1921-4-10 2396 Los Angeles South base of San Gabriel Mtns. San Dimas Canyon. 427 Comment
  RSA91306  Vicia americana F. W. Peirson 1907-7-9 2016 Los Angeles East Fork of Alder Creek, San Gabriel Mts Comment
  RSA91307  Lathyrus vestitus subsp. vestitus F. W. Peirson 1918-5-5 s.n. Los Angeles santa Susana Grade, San Fernando Valley Comment
  RSA91310  Vicia americana F. W. Peirson 1908-4-18 2015 Los Angeles Point Fermin Comment
  RSA91317  Lupinus longifolius F. W. Peirson 1921-4-10 7723 Los Angeles San Dimas Canyon, south base of San Gabriel Mts 442 Comment
  RSA91318  Lupinus excubitus var. hallii F. W. Peirson 1921-5-3 7722 Los Angeles ridge between Bear Canyon and Millard Canyon, San Gabriel Mts 1067 Comment
  RSA91320  Lupinus longifolius F. W. Peirson 1923-2-10 543 Los Angeles Laurel Canyon, Santa Monica Mts. Comment
  RSA91322  Lupinus longifolius F. W. Peirson 1920-5-6 7724 Los Angeles Fish Canyon, S base of San Gabriel Mts 777 Comment
  RSA91332  Rupertia physodes F. W. Peirson 1919-5-18 93 Los Angeles Monrovia Canyon, S base of San Gabriel Mountains 457 Comment
  RSA91343  Amorpha californica var. californica F. W. Peirson 85 Los Angeles Near Kewen Lake, Pasadena Comment
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Oct 21 2014
  RSA91357  Hoita orbicularis F. W. Peirson 1921-7-1 2472 Los Angeles Arraster Creek. 945 Comment
  RSA91362  Medicago polymorpha F. W. Peirson 1920-4-20 548 Los Angeles 1085 New York Drive, Altadena. Comment
  RSA91367  Melilotus indicus F. W. Peirson 1919-5-21 450 Los Angeles Arroyo Seco, south base of San Gabriel Mountains 426 Comment
  RSA91369  Bromus diandrus F. W. Peirson 1918-04 1559 Los Angeles Altadena. Comment
  RSA91383  Linum usitatissimum F. W. Peirson 2026 Los Angeles Los Angeles River, San Fernando Valley Comment
  RSA91442  Trifolium gracilentum var. palmeri F. W. Peirson 1923-4-12 3436 Los Angeles Wilson's Cove, San Clemente Island. Comment
  RSA91467  Scirpus microcarpus F. W. Peirson 1924-5-27 4636 Los Angeles Colby's Ranch 975 Comment
  RSA91512  Poa pratensis F. W. Peirson 1918-04 1553 Los Angeles New York Drive, Altadena Comment
  RSA91553  Trifolium willdenovii F. W. Peirson 1919-5-14 423 Los Angeles Eaton Canyon 732 Comment
  RSA91581  Schoenoplectus maritimus F. W. Peirson 1918-6-16 1617 Los Angeles Small lake south of Palmdale, west Mojave Desert. Comment
  RSA91592  Carex mesochorea F. W. Peirson 1929-5-10 8365 Los Angeles Altadena. Comment
  RSA91603  Carex multicaulis F. W. Peirson 1924-5-27 4626 Los Angeles north slope of Strawberry Peak, San Bernardino Mts. 1524 Comment
  RSA91680  Nassella lepida F. W. Peirson 1918-4-28 1586 Los Angeles Summit of Turnbull Canyon, hills above Whittier Comment
  RSA91695  Gnaphalium palustre F. W. Peirson 1315 Los Angeles Sink at Inglewood. Comment
  RSA91717  Gamochaeta pensylvanica F. W. Peirson 1918-03 1314 Los Angeles At Altadena. Comment
  RSA91729  Achnatherum coronatum F. W. Peirson 1918-6-10 1583 Los Angeles E trail to Mt Low, San Gabriel Mts 915 Comment
  RSA91732  Nassella pulchra F. W. Peirson 1918-4-28 1587 Los Angeles Summit of Turnbull Canyon, hills above Whittier Comment
  RSA91737  Pseudognaphalium stramineum F. W. Peirson 1923-4-12 3464 Los Angeles Wilson's Cove, San Clemente Island. Comment
  RSA91741  Gnaphalium stramineum F. W. Peirson 1921-6-19 2583 Los Angeles Crystal Lake, North Fork San Gabriel River 1676 Comment
  RSA91750  Pseudognaphalium biolettii F. W. Peirson 1919-1-26 304 Los Angeles Rubio Canyon, south base of San Gabriel Mt. 534 Comment
  RSA91753  Pseudognaphalium biolettii F. W. Peirson 1923-4-12 3465 Los Angeles Wilson's Cove, San Clemente Island. Comment
  RSA91760  Gnaphalium californicum F. W. Peirson 1918-2-12 2788 Los Angeles Field near foot of Lukens Trail Comment
  RSA91762  Ericameria linearifolia F. W. Peirson 1926-4-27 6669 Los Angeles San Gabriel Mountains. North side of San Gabriel Mountains, Rock Creek. 1296 Comment
  RSA91786  Ericameria linearifolia F. W. Peirson 1928-6-2 7945 Los Angeles on South Fork of Little Rock Creek, north slope of San Gabriel Mts. 1677 Comment
  RSA91855  Crypsis vaginiflora F. W. Peirson 1906-7-19 1572 Los Angeles Inglewood. Comment
  RSA91909  Phalaris minor F. W. Peirson 1918-4-28 1575 Los Angeles Road east and south of El Monte. Comment
  RSA92043  Bromus carinatus F. W. Peirson 1918-4-28 1558 Los Angeles Road east and south of El Monte. Comment
  RSA92045  Bromus hordeaceus F. W. Peirson 1918-5-5 1555 Los Angeles Brents on the Malibu, Santa Monica Mountains. Comment
  RSA92054  Bromus tectorum F. W. Peirson 1923-5-26 4334 Los Angeles Rock Creek Divide 2011 Comment
  RSA92096  Cyperus rotundus F. W. Peirson 1922-8-1 3265 Los Angeles High school (later Junior College) grounds of Colorado St., Pasadena, California Comment
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Oct 7 2010
  RSA92127  Eleocharis parishii F. W. Peirson 1930-5-31 8911 Los Angeles Below Lovejoy Dam, Lovejoy Buttes, southwestern Mojave Desert. Comment
  RSA92136  Eleocharis rostellata F. W. Peirson 1922-7-5 4264 Los Angeles Swartout Valley, 2 miles east of Big Pines north side of San Gabriel mtns. 1982 Comment
  RSA92162  Schoenoplectus californicus F. W. Peirson 1906-7-19 1614 Los Angeles Inglewood. Comment
  RSA92164  Scirpus acutus var. occidentalis F. W. Peirson 1918-4-28 1611 Los Angeles Southeast of El Monte. Comment
  RSA92185  Lagophylla ramosissima F. W. Peirson 1922-7-29 1359 Los Angeles grade SE of Quail Lake 1067 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
  RSA92208  Nicolletia occidentalis F. W. Peirson 1933-5-13 10662 Los Angeles 12 miles south of Muroc. Comment
  RSA92222  Perityle emoryi F. W. Peirson 1907-7-1 1368 Los Angeles Catalina Island. Comment
  RSA92230  Madia minima F. W. Peirson 1921-6-14 2457 Los Angeles San Gabriel Mountains. Pine Flats, headwaters of Tujunga Creek. 1676 Comment
  RSA92237  Madia minima F. W. Peirson 1920-6-10 238 Los Angeles summit of Mt. Wilson 2134 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
  RSA92257  Layia platyglossa subsp. campestris F. W. Peirson 1923-4-9 3430 Los Angeles San Clemente Island: Wilson's Cove Comment
  RSA92262  Achyrachaena mollis F. W. Peirson 1918-4-28 2495 Los Angeles Turnbull Canyon near Whittier, Puente Hills. Comment
  RSA92276  Layia glandulosa F. W. Peirson 1921-5-19 2413 Los Angeles Little Rock Creek: north base of San Gabriel Mountains 976 Comment
  RSA92282  Layia glandulosa F. W. Peirson 1926-4-27 6667 Los Angeles San Gabriel Mountains. North side of San Gabriel Mountains, Rock Creek. 1296 Comment
  RSA92283  Layia glandulosa F. W. Peirson s.n. Los Angeles Wash of Arroyo Seco, Pasadena Comment
  RSA92289  Layia glandulosa F. W. Peirson 1919-3-30 345 Los Angeles Tujunga Canyon, west end of San Gabriel Mountains 427 Comment
  RSA92322  Poa secunda var. secunda F. W. Peirson 1920-5-9 5366 Los Angeles Summit of Mt. Wilson. 1753 Comment
  RSA92324  Poa secunda var. secunda F. W. Peirson 1922-5-30 3072 Los Angeles west spur of Mt. Lowe 1371 Comment
  RSA92371  Poa annua F. W. Peirson 1922-7-6 4201 Los Angeles Big Pines Camp 2088 Comment
  RSA92381  Psilocarphus brevissimus F. W. Peirson 1304 Los Angeles Laurel Canyon, Santa Monica Mts. Comment
  RSA92386  Ancistrocarphus filagineus F. W. Peirson 1919-5-10 1302 Los Angeles Arraster [Arrastre] Creek. North base of San Gabriel Mountains 915 Comment
  RSA92389  Eriophyllum nevinii F. W. Peirson 1923-4-10 3477 Los Angeles North slopes or on sea bluffs, San Clemente Island Comment
  RSA92396  Eriophyllum pringlei F. W. Peirson 1926-4-26 6656 Los Angeles about 1 mile east of Palmdale. Comment
  RSA92405  Bidens laevis F. W. Peirson 1919-11-7 1337 Los Angeles Rio Hondo Comment
  RSA92408  Bidens pilosa var. pilosa F. W. Peirson 1919-12-20 4236 Los Angeles foot of Eaton Canyon at bridge, base of San Gabriel Mts. Comment
  RSA92411  Coreopsis bigelovii F. W. Peirson 1921-5-19 1339 Los Angeles Little Rock Creek: north base of San Gabriel Mountains 976 Comment
  RSA92417  Coreopsis bigelovii F. W. Peirson s.n. Los Angeles Benedicts Canyon, Santa Monica Mts Comment
  RSA92420  Coreopsis calliopsidea F. W. Peirson 1917-5-13 1341 Los Angeles Roadside near Little Rock, north base of San Gabriel Mountains. Comment
  RSA92421  Coreopsis calliopsidea F. W. Peirson 1932-4-17 9863 Los Angeles 2 miles northeast of Lovejoy Buttes, Mohave Desert 762 Comment
  RSA92469  Coreopsis californica F. W. Peirson 1930-5-30 8907 Los Angeles 1 miles N of Llano Comment
  RSA92473  Coreopsis californica F. W. Peirson 1917-5-13 2780 Los Angeles Near Little Rock, Mojave Desert. Comment
  RSA92474  Coreopsis californica var. californica F. W. Peirson 1920-4-26 1342 Los Angeles Santa Anita Wash, S base of San Gabriel Mts. 213 Comment
  RSA92503  Stylocline gnaphaloides F. W. Peirson 1919-3-27 232 Los Angeles Hills west of Arroyo Seco, near Pasadena 426 Comment
  RSA92530  Eriophyllum wallacei F. W. Peirson 1919-5-30 346 Los Angeles San Gabriel Mountains. 426 Comment
  RSA92539  Eriophyllum wallacei F. W. Peirson 1919-5-9 1391 Los Angeles San Gabriel Mountains. 838 Comment
  RSA92544  Salix exigua F. W. Peirson 1921-3-6 9611 Los Angeles San Gabriel Wash. 213 Comment
  RSA92608  Salix exigua F. W. Peirson 1919-3-30 355 Los Angeles Tujunga Canyon, west end of San Gabriel Mountains 396 Comment
  RSA92610  Salix exigua F. W. Peirson 1919-5-10 9610 Los Angeles Arraster [Arrastre] Creek, San Gabriel Mountains. 838 Comment
  RSA92621  Salix lasiolepis Mabel Peirson 1925-3-1 5434 Los Angeles Arroyo Seco below California Street bridge, Pasadena Comment
  RSA92634  Monolopia lanceolata F. W. Peirson 1919-3-30 526 Los Angeles on low hill near entrance to Tujunga Canyon 396 Comment
  RSA92640A  Salix lasiolepis F. W. Peirson 1919-3-30 720 Los Angeles Tujunga Canyon, west end of San Gabriel Mountains. 457 Comment
  RSA92640B  Salix lasiolepis F. W. Peirson 1919-3-30 720 Los Angeles Tujunga Canyon, west end of San Gabriel Mountains. 457 Comment
  RSA92643  Salix lasiolepis F. W. Peirson 1924-12-3 9604 Los Angeles San Gabriel Wash at Foothill Boulevard, Azusa. Comment
  RSA92644  Salix lasiolepis F. W. Peirson 1919-2-9 317 Los Angeles Fish Canyon, south base of San Gabriel Mountains 457 Comment
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Dec 10 2014
  RSA92645  Salix lasiolepis F. W. Peirson 1919-5-10 4281 Los Angeles Arraster [Arrastre] Creek, San Gabriel Mountains. 838 Comment
  RSA92646  Salix lasiolepis F. W. Peirson 1932-3-3 9767 Los Angeles Arroyo Seco, Pasadena 396 Comment
  RSA92656  Eriophyllum confertiflorum var. confertiflorum F. W. Peirson 1920-9-12 2276 Los Angeles South trail to Mt. San Antonio 2438 Comment
  RSA92657  Eriophyllum confertiflorum var. confertiflorum F. W. Peirson 1921-7-19 2711 Los Angeles San Gabriel Mountains. 1981 Comment
  RSA92660  Eriophyllum confertiflorum F. W. Peirson 1919-2-12 239 Los Angeles Foot of hills, west of Arroyo Seco near Pasadena 426 Comment
  RSA92661  Eriophyllum confertiflorum var. confertiflorum F. W. Peirson 1923-5-21 4241 Los Angeles San Gabriel Mountains. 548 Comment
  RSA92699  Salix laevigata F. W. Peirson 1921-4-3 2668 Los Angeles Pacoima Canyon, west end of San Gabriel Mountains 518 Comment
  RSA92700  Salix laevigata F. W. Peirson 1919-3-30 359 Los Angeles Tujunga Canyon, west end of San Gabriel Mountains 427 Comment
  RSA92861  Chaenactis santolinoides F. W. Peirson 1928-6-2 7932 Los Angeles S fork of Rock Creek: trail toward the summit. 1982 Comment
  RSA92863  Chaenactis santolinoides F. W. Peirson 1920-6-10 241 Los Angeles along north rim of summit of Mt. Wilson 1737 Comment
  RSA92870  Hesperocnide tenella F. W. Peirson 1921-2-26 2356 Los Angeles Topango Canyon Divide. 488 Comment
  RSA92881  Anemopsis californica F. W. Peirson 1919-6-15 503 Los Angeles Rock Creek, north slope of San Gabriel Mountains. 1296 Comment
  RSA92910  Madia elegans subsp. densifolia F. W. Peirson 1920-9-17 2712 Los Angeles San Antonio Canyon, San Gabriel Mountains. 1341 Comment
  RSA92920  Lasthenia californica F. W. Peirson 1918-4-28 1371 Los Angeles Summit of Turnbull Canyon, hills above Whittier Comment
  RSA92924  Lasthenia californica F. W. Peirson 1923-4-9 3425 Los Angeles San Clemente Island: Wilson's Cove Comment
  RSA92987  Lasthenia coronaria F. W. Peirson 1921-3-3 330 Los Angeles Arroyo Seco, near Pasadena 350 Comment
  RSA92988  Lasthenia coronaria F. W. Peirson 1927-5-7 7673 Los Angeles Arroyo Seco, above Teddy's 396 Comment
  RSA92990  Lasthenia coronaria F. W. Peirson 1912-03 s.n. Los Angeles Rubio Wash, south base of San Gabriel Mountains Comment
  RSA93072  Solidago californica F. W. Peirson 1918-9-7 1229 Los Angeles Henniger Flats, San Gabriel Mountains 854 Comment
  RSA93073  Solidago californica F. W. Peirson 1918-11-1 230 Los Angeles Arroyo Seco Canyon, south slope of San Gabriel Mts. 1296 Comment
  RSA93074  Solidago californica F. W. Peirson 1918-11-1 1228 Los Angeles Arroyo Seco Canyon, south slope of San Gabriel Mts. 1296 Comment
  RSA93096  Erigeron philadelphicus F. W. Peirson 1908-5-22 1292 Los Angeles Bixby Ranch near Long Beach. Comment
  RSA93104  Corethrogyne filaginifolia var. filaginifolia F. W. Peirson 1918-9-15 229 Los Angeles summit of Lukens Peak Comment
  RSA93113  Erigeron philadelphicus F. W. Peirson 1920-5-12 2761 Los Angeles El Monte Comment
  RSA93166  Baccharis emoryi F. W. Peirson 1924-10-19 5228 Los Angeles Clearwater. Comment
  RSA93168  Baccharis salicifolia F. W. Peirson 1918-10-16 283 Los Angeles foot of Echo Mountain Trail 549 Comment
  RSA93173  Machaeranthera canescens var. canescens F. W. Peirson 1923-8-30 4008 Los Angeles Le Montaine, north of Big Pines, ['Mescal Creek'] 2226 Comment
  RSA93202  Baccharis salicifolia F. W. Peirson 1919-02 353 Los Angeles Rubio Canyon, S side of San Gabriel Mts. 549 Comment
  RSA93228  Heterotheca sessiliflora subsp. echioides F. W. Peirson 1920-8-2 2219 Los Angeles Roadside a short distance E of Chatsworth Park. Comment
  RSA93229  Heterotheca sessiliflora subsp. echioides F. W. Peirson 1225 Los Angeles Roadside near Sierra Madre. Comment
  RSA93265  Conyza bonariensis F. W. Peirson 1920-6-13 1348 Los Angeles Weed at 1085 New York Drive, Altadena Comment
  RSA93285  Pentachaeta aurea F. W. Peirson 1222 Los Angeles Altadena. Comment
  RSA93328  Xylorhiza tortifolia F. W. Peirson 1932-4-17 9847 Los Angeles near Lovejoy Buttes, southwestern Mojave Desert 762 Comment
Read comments
Dec 6 2011
  RSA93356  Heterotheca fastigiata F. W. Peirson 1918-10-21 1226 Los Angeles West Fork of San Gabriel River. 1067 Comment
  RSA93358  Heterotheca fastigiata F. W. Peirson 1918-10-16 285 Los Angeles Pacoima Canyon west end of San Gabriel Mts. 534 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
  RSA93369  Brickellia nevinii F. W. Peirson 1918-09 228 Los Angeles Foot of Mt. Wilson Toll Road, south base of mountains 396 Comment
  RSA93370  Brickellia nevinii F. W. Peirson 1918-9-15 4731 Los Angeles lower part of trail up Lukens Peak 640 Comment
  RSA93387  Symphoricarpos mollis F. W. Peirson 1919-5-18 440 Los Angeles Monrovia Canyon, S base of San Gabriel Mountains 457 Comment
  RSA93639  Antennaria dimorpha F. W. Peirson 1921-6-15 2492 Los Angeles Pine Flats, headwaters of Tujunga 1677 Comment
  RSA93679  Filago californica F. W. Peirson 1918-6-4 233 Los Angeles east of Rubio Canyon, south base of San Gabriel Mountains Comment
  RSA93733  Acamptopappus sphaerocephalus F. W. Peirson 1921-5-19 2407 Los Angeles Little Rock Creek: north base of San Gabriel Mountains 976 Comment
  RSA93738  Aster lanceolatus F. W. Peirson 1908-5-22 2589 Los Angeles Bixby Ranch near Long Beach. Comment
  RSA93782  Aster greatae F. W. Peirson 1918-10-16 4733 Los Angeles Rubio Canyon, southern base of San Gabriel Mountains 732 Comment
  RSA93784  Aster greatae F. W. Peirson 1918-10-16 274 Los Angeles Pacoima Canyon, west end of San Gabriel Mts. 534 Comment
  RSA93803  Chaenactis glabriuscula var. glabriuscula F. W. Peirson 1919-3-30 4745 Los Angeles Tujunga Canyon, west end of San Gabriel Mountains 457 Comment
  RSA93808  Chaenactis artemisiifolia F. W. Peirson 1919-7-3 242 Los Angeles San Gabriel Mountains: Lukens Peak 915 Comment
  RSA93811  Chaenactis fremontii F. W. Peirson 1930-5-30 8905 Los Angeles 1 miles N of Llano Comment
  RSA93837  Artemisia tridentata subsp. parishii F. W. Peirson 1921-11-11 1452 Los Angeles Lower Bouquet Canyon. Comment
  RSA93861  Encelia californica F. W. Peirson 1919-2-16 1335 Los Angeles Point Fermin. Comment
  RSA93873  Helenium puberulum F. W. Peirson 1923-10-21 4228 Los Angeles Sunset Canyon, Verdugo Mountains 457 Comment
  RSA93904  Encelia actoni F. W. Peirson 1921-5-19 4144 Los Angeles Little Rock Creek, north base of San Gabriel Mts. 915 Comment
  RSA93913  Iva axillaris F. W. Peirson 1921-7-2 1322 Los Angeles Pallett Creek, north base of San Gabriel Mountains. 1098 Comment
  RSA93916  Xanthium strumarium F. W. Peirson 1924-10-26 5264 Los Angeles Arroyo Seco, below California St. bridge, Pasadena 198 Comment
  RSA93935  Ambrosia acanthicarpa F. W. Peirson 1919-10-26 271 Los Angeles Rubio Reservoir, south base of San Gabriel Mts. Comment
  RSA93936  Encelia californica F. W. Peirson 1921-2-26 2781 Los Angeles Topango Canyon Divide. 488 Comment
  RSA93947  Artemisia dracunculus F. W. Peirson 1918-10-16 272 Los Angeles Pacoima Canyon, west end of San Gabriel Mts. 534 Comment
  RSA93956  Hymenoclea salsola var. salsola F. W. Peirson 1921-5-19 1316 Los Angeles Little Rock Creek: north base of San Gabriel Mountains 945 Comment
  RSA94116  Brickellia californica F. W. Peirson 1924-10-26 5262 Los Angeles Arroyo Seco below California Street bridge, Pasadena 198 Comment
  RSA94120  Brickellia californica F. W. Peirson 1921-10-22 2599 Los Angeles Head of Eaton Canyon, base of San Gabriel peak. 1646 Comment
  RSA94125  Hulsea vestita subsp. gabrielensis F. W. Peirson 1921-6-15 2440 Los Angeles Trail from Pine Flats to Chilao 1677 Comment
  RSA94165  Monoptilon bellioides F. W. Peirson 1927-5-7 7289 Los Angeles 4 miles east of Lancaster. Comment
  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
  RSA94189  Hemizonia fasciculata F. W. Peirson s.n. Los Angeles Playa del Rey. Comment
  RSA94194  Artemisia ludoviciana subsp. ludoviciana F. W. Peirson 1923-9-1 4028 Los Angeles San Gabriel Mountains 2011 Comment
  RSA94365  Madia gracilis F. W. Peirson 1920-6-10 2777 Los Angeles Maple Spring on trail to Mt. Lowe. 1067 Comment
  RSA94394  Chaenactis fremontii F. W. Peirson 1921-5-19 2409 Los Angeles Little Rock Creek: N slope of San Gabriel Mountains 960 Comment
  RSA94402  Chaenactis stevioides F. W. Peirson 1923-5-25 3522 Los Angeles along stream on south side of canyon of Rock Creek, San Gabriel Mountains. 1296 Comment
  RSA94404  Artemisia douglasiana F. W. Peirson 1918-9-15 246 Los Angeles lower part of trail up Lukens Peak 762 Comment
  RSA94427  Matricaria matricarioides F. W. Peirson 1920-4-20 2104 Los Angeles 1085 New York Drive, Altadena. Comment
  RSA94428  Chaenactis artemisiifolia F. W. Peirson s.n. Los Angeles Nichols Canyon. Comment
  RSA94544  Packera ionophylla F. W. Peirson 1907-7-9 1591 Los Angeles Pine Flats at the headwaters of the Tujunga 1677 Comment
  RSA94577  Anthemis cotula F. W. Peirson 1920-6-13 2105 Los Angeles Weed at 1250 Holliston Ave., Altadena. Comment
  RSA94579  Achillea millefolium F. W. Peirson 1919-5-18 443 Los Angeles San Gabriel Mtns. Monrovia Canyon. 396 Comment
  RSA94609  Syntrichopappus fremontii F. W. Peirson 1917-5-13 1379 Los Angeles Near Little Rock, Mojave Desert. Comment
  RSA94618  Venegasia carpesioides F. W. Peirson 1921-4-10 1365 Los Angeles South base of San Gabriel Mtns. San Dimas Canyon. 426 Comment
  RSA94631  Rigiopappus leptocladus F. W. Peirson 1922-6-3 3076 Los Angeles At Collins Ranch, north slope of Liebre Mts. 1143 Comment
  RSA94633  Syntrichopappus lemmonii F. W. Peirson 1926-5-8 6731 Los Angeles On road to Los Angeles County Playground about 1 mile from Rock Creek 1311 Comment
  RSA94636  Syntrichopappus fremontii F. W. Peirson 1926-5-8 6731 Los Angeles abundant along road to Los Angeles County Playground at about 1 mile from Rock Creek 1310 Comment
  RSA94677  Senecio mikanioides F. W. Peirson 1906-7-10 1434 Los Angeles Rustic Canyon, Santa Monica Mountains Comment
  RSA94707  Senecio astephanus F. W. Peirson 1920-6-10 1432 Los Angeles trail east of Inspiration Point, Mt. Lowe 1371 Comment
  RSA94714  Senecio flaccidus var. douglasii F. W. Peirson 1919-10-20 247 Los Angeles Along stream bed of Rubio Canyon, northeast Altadena Comment
  RSA94809  Acourtia microcephala F. W. Peirson 1929-6-30 8419 Los Angeles San Gabriel Mtns. In open clearing on Aliso Creek. 1098 Comment
  RSA94810  Acourtia microcephala F. W. Peirson 1919-7-1 520 Los Angeles South base of San Gabriel Mtns, Fish Canyon. 457 Comment
  RSA94814  Lactuca serriola F. W. Peirson 1921-9-21 2584 Los Angeles at 1085 New York Drive, Altadena. Comment
  RSA94819  Hypochaeris glabra F. W. Peirson 1920-3-14 1469 Los Angeles Arroyo Seco, Pasadena. 442 Comment
  RSA94845  Senecio vulgaris F. W. Peirson 1918-10-21 290 Los Angeles Ovid's Camp, west fork of San Gabriel River. Comment
  RSA94916  Cirsium brevistylum F. W. Peirson s.n. Los Angeles Laurel Canyon, Santa Monica Mts. Comment
  RSA94920  Cirsium occidentale var. californicum F. W. Peirson 1921-7-15 2504 Los Angeles San Gabriel River 610 Comment
  RSA94921  Cirsium occidentale var. californicum F. W. Peirson 1929-6-30 8420 Los Angeles Aliso Creek at Tie Canyon 1357 Comment
  RSA94933  Tetradymia axillaris var. longispina F. W. Peirson 1921-5-20 1429 Los Angeles Little Rock Creek, N slope of San Gabriel Mts 1037 Comment
  RSA94938  Tetradymia glabrata F. W. Peirson 1927-5-7 7263 Los Angeles 3 miles east of Lancaster. Comment
  RSA94947  Tetradymia canescens F. W. Peirson 1923-8-30 4251 Los Angeles Le Montaine, the summit north of Big Pines, Swartout Valley. 2256 Comment
Read comments
Dec 23 2014
  RSA94956  Malacothrix clevelandii F. W. Peirson 1925-4-23 1782 Los Angeles Forks of San Gabriel River. 534 Comment
  RSA94965  Malacothrix glabrata F. W. Peirson 1921-6-20 2149 -a Los Angeles North Fork of San Gabriel River 762 Comment
  RSA94982  Stephanomeria spinosa F. W. Peirson 1922-7-6 3170 Los Angeles Summit of Blue ridge, Swartout Valley 2438 Comment
  RSA94983  Stephanomeria spinosa F. W. Peirson 1923-8-30 4742 Los Angeles Le Montaine north of Big Pines, Swartout Valley. 2226 Comment
  RSA95002  Malacothrix glabrata F. W. Peirson 1923-5-27 4313 Los Angeles Pallett Creek, tributary to Rock Creek, north slope of San Gabriel Mts. 1097 Comment
  RSA95004  Malacothrix glabrata F. W. Peirson 1917-5-13 1477 Los Angeles Near Little Rock, Mojave Desert. Comment
  RSA95007  Malacothrix glabrata F. W. Peirson 1925-4-23 5800 Los Angeles Forks of San Gabriel River. 534 Comment
  RSA95021  Malacothrix saxatilis var. tenuifolia F. W. Peirson s.n. Los Angeles beach above Santa Monica Comment
  RSA95030  Malacothrix foliosa F. W. Peirson 1923-4-12 3463 Los Angeles Wilson's Cove, San Clemente Island. Comment
  RSA95031  Malacothrix coulteri F. W. Peirson 1927-5-7 7273 Los Angeles 3 miles south of Muroc, Mojave Desert Comment
  RSA95033  Lepidospartum squamatum F. W. Peirson 1919-10-20 275 Los Angeles Brae Burn Road, Altadena. Comment
  RSA95035  Lepidospartum latisquamum F. W. Peirson 1923-9-1 4017 Los Angeles Swartout Valley, at Saw Mill Canyon 1 mile E of summit at Big Pines 2011 Comment
  RSA95036  Lepidospartum latisquamum F. W. Peirson 1928-9-5 8194 Los Angeles Swartout Valley, 1 mile E of summit at Big Pines 2011 Comment
  RSA95047  Hemizonia parryi subsp. australis F. W. Peirson 1920-6-22 1352 Los Angeles Along Valley Boulevard at Bassett Comment
  RSA95055  Rafinesquia californica F. W. Peirson 1923-4-11 3474 Los Angeles In canyon below farm buildings at Eagle Ranch, San Clemente Island Comment
  RSA95056  Rafinesquia californica F. W. Peirson 1921-7-16 251 Los Angeles San Gabriel River 1372 Comment
  RSA95062  Hemizonia australis F. W. Peirson 1951-1 1350 Los Angeles at 1085 New York Drive, Altadena. Comment
Read comments
Apr 1 2009
  RSA95065  Hemizonia pungens F. W. Peirson 1919-8-30 1351 Los Angeles Desert between Mojave and Lancaster. Comment
  RSA95092  Calycoseris parryi F. W. Peirson 1921-5-20 2765 Los Angeles Little Rock Creek, San Gabriel Mtns. 976 Comment
  RSA95116  Agoseris heterophylla var. heterophylla F. W. Peirson 1922-7-7 3189 Los Angeles Swartout Valley, Wright's Ranch. 1845 Comment
  RSA95122  Agoseris retrorsa F. W. Peirson 1922-7-6 1491 Los Angeles Blue Ridge near Swartout Valley. 2316 Comment
  RSA95123  Agoseris retrorsa F. W. Peirson 1918-6-10 252 Los Angeles west slope of San Gabriel Peak 1768 Comment
  RSA95125  Agoseris grandiflora var. grandiflora F. W. Peirson 1923-5-21 3519 Los Angeles South face of San Gabriel Mountains. Fish Canyon 792 Comment
  RSA95133  Crepis acuminata F. W. Peirson 1921-7-17 2507 Los Angeles Prairie Fork of San Gabriel River, San Gabriel Mountains. 2012 Comment
  RSA95174  Hieracium albiflorum F. W. Peirson 1921-7-3 2480 Los Angeles Vincent Gulch tributary to East Fork of San Gabriel Mts. [River] 1982 Comment
  RSA95179  Hieracium argutum F. W. Peirson 1918-10-24 1498 Los Angeles Big Santa Anita Canyon, San Gabriel Mountains. 1067 Comment
  RSA95180  Hieracium argutum F. W. Peirson 1918-8-6 258 Los Angeles Trail to Sierra Madre; San Gabriel Mts. 823 Comment
  RSA95215  Stephanomeria exigua subsp. exigua F. W. Peirson 1923-8-31 4014 Los Angeles Blue Ridge, near Swartout Valley 2529 Comment
  RSA95221  Stephanomeria pauciflora var. pauciflora F. W. Peirson 1928-9-4 8189 Los Angeles Rock Creek about 1 mile below Pallett Creek Comment
  RSA95223  Stephanomeria blairii F. W. Peirson 1923-4-9 3475 Los Angeles San Clemente Island: at Lemon Tank Comment
  RSA95224  Stephanomeria cichoriacea F. W. Peirson 1924-8-23 5050 Los Angeles West Fork of San Gabriel River. 411 Comment
  RSA95225  Stephanomeria cichoriacea F. W. Peirson 1918-9-15 249 Los Angeles Lukens Peak trail, San Gabriel Mountains. Comment
  RSA95240  Uropappus lindleyi F. W. Peirson 1919-5-10 1467 Los Angeles Arraster Creek 915 Comment
  RSA95241  Microseris lindleyi F. W. Peirson 1923-4-12 3453 Los Angeles Wilson's Cove, San Clemente Island. Comment
  RSA95244  Microseris lindleyi F. W. Peirson 1919-3-27 350 Los Angeles Hills west of Arroyo Seco, near Pasadena 426 Comment
  RSA95251  Taraxacum officinale F. W. Peirson 1924-5-27 4679 Los Angeles Colby's Ranch 975 Comment
  RSA95291  Rhamnus ilicifolia F. W. Peirson 1924-5-26 4625 Los Angeles trail to Switzers Camp, Arroyo Seco, north of Pasadena 945 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
  RSA95304  Rhamnus californica subsp. californica F. W. Peirson 1920-4-22 108 Los Angeles Rubio Canyon, south base of San Gabriel Mts. Comment
  RSA95308  Rhamnus crocea F. W. Peirson 1919-4-1 339 Los Angeles Arroyo Seco, west of Pasadena. Comment
  RSA95311  Rhamnus crocea F. W. Peirson 1923-3-3 5314 Los Angeles bottom of canyon of Arroyo Seco, Pasadena 366 Comment
  RSA95326  Malacothamnus fasciculatus F. W. Peirson 1918-6-19 109 Los Angeles San Antonio Canyon Wash, south base of San Gabriel Mts. Comment
  RSA95327  Malacothamnus fasciculatus F. W. Peirson 1918-10-26 114 Los Angeles Big Dalton Canyon, south base of San Gabriel Range. 762 Comment
  RSA95331  Rhamnus tomentella subsp. cuspidata F. W. Peirson 1918-6-16 110 Los Angeles Rock Creek, north slope of San Gabriel Mountains 1448 Comment
  RSA95335  Ceanothus integerrimus F. W. Peirson 111 Los Angeles Mt. Lowe, San Gabriel Mountains. Comment
  RSA95340  Rhamnus ilicifolia F. W. Peirson 1919-5-10 726 Los Angeles Arraster [Arraster] Trail, Mt. Gleason, San Gabriel Mts. 1220 Comment
  RSA95347  Ceanothus oliganthus var. oliganthus F. W. Peirson 1925-3-18 5470 Los Angeles South slope of Newhall Grade, west end of San Gabriel Mts 381 Comment
  RSA95351  Ceanothus oliganthus F. W. Peirson 1927-3-19 7116 Los Angeles Seminole Hot Springs. Santa Monica Mts. 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
  RSA95394  Ceanothus megacarpus F. W. Peirson 4447 Los Angeles Laurel Canyon. Comment
  RSA95403  Ceanothus integerrimus F. W. Peirson 1919-6-14 729 Los Angeles Rock Creek, north slope of San Gabriel Mountains 1707 Comment
  RSA95404  Ceanothus integerrimus F. W. Peirson 1920-5-16 2138 Los Angeles Delta Canyon branch of Tujunga Canyon, west end of San Gabriel Mountains 518 Comment
  RSA97152  Lomatium dasycarpum subsp. dasycarpum F. W. Peirson 1919-3-27 338 Los Angeles Foot of trail to Lukens Peak 609 Comment
  RSA97155  Lupinus excubitus var. hallii F. W. Peirson 1921-4-21 5213 Los Angeles Trail below Sycamore Flat, on way to San Dimas, San Gabriel Mountains. 793 Comment
  RSA97157  Lomatium dissectum var. multifidum F. W. Peirson 1929-6-30 8422 Los Angeles Aliso Creek at Tie Canyon 1357 Comment
  RSA97162  Lomatium dissectum var. multifidum F. W. Peirson 1922-6-3 3080 Los Angeles 3 miles west of Elizabeth Lake. 1113 Comment
  RSA97208  Lomatium dasycarpum subsp. dasycarpum F. W. Peirson 1920-5-8 2312 Los Angeles San Raphael Hills Comment
  RSA97227  Garrya flavescens var. pallida F. W. Peirson 1920-6-10 822 Los Angeles Trail from San Gabriel Peak to Mt. Wilson, San Gabriel Mts. 1677 Comment
  RSA97246  Lomatium vaginatum F. W. Peirson 1926-4-26 6647 Los Angeles Summit of Mint Canyon Grade, northwest part of San Gabriel Mts. Comment
  RSA97271  Cornus occidentalis F. W. Peirson s.n. Los Angeles Laurel Canyon, near Santa Monica. Comment
  RSA97281  Lomatium vaginatum F. W. Peirson 1921-2-26 2358 Los Angeles Topanga Canyon, west end of San Gabriel Mountains 304 Comment
  RSA97295  Garrya veatchii F. W. Peirson 1926-3-20 6515 Los Angeles Arroyo Seco. 1006 Comment
  RSA97296  Garrya veatchii F. W. Peirson 1919-11-30 2723 Los Angeles South base of San Gabriel Mnts., Middle Eaton Canyon. 610 Comment
  RSA97319  Lomatium lucidum F. W. Peirson 1920-3-28 2098 Los Angeles North slope of low hills at foot of Tujunga Canyon, w. end of San Gabriel Mountains. 457 Comment
  RSA97337  Lomatium lucidum F. W. Peirson 1925-4-23 5783 Los Angeles Forks of San Gabriel River. 534 Comment
  RSA97341  Lomatium mohavense subsp. mohavense F. W. Peirson 1926-4-26 6655 Los Angeles about 1 mile east of Palmdale Comment
  RSA97346  Lomatium nevadense var. parishii F. W. Peirson 1921-6-16 4460 Los Angeles North slope of Mt. Waterman, San Gabriel Mts. 1981 Comment
  RSA97352  Cercocarpus betuloides F. W. Peirson 1923-4-9 3429 Los Angeles San Clemente Island, about 2 miles southwest of Wilson's Cove. Comment
  RSA97360  Bowlesia incana F. W. Peirson 1951-4-2 816 Los Angeles Elysian Park. Comment
  RSA97376  Sanicula bipinnatifida F. W. Peirson 1918-4-28 812 Los Angeles Turnbull Canyon near Whittier, Puente Hills. Comment
  RSA97403  Yabea microcarpa F. W. Peirson 1923-4-9 3424 Los Angeles San Clemente Island: about 6 miles southeast of Wilson s Cove. Comment
Read comments
May 16 2008
  RSA97405  Torilis nodosa F. W. Peirson 1908-5-28 2093 Los Angeles Bixby Ranch near Long Beach. Comment
  RSA97419  Tauschia arguta F. W. Peirson 1908-05 134 Los Angeles Eaton Canyon at south base of mountains. Comment
  RSA97424  Oreonana vestita F. W. Peirson 1921-6-16 2651 Los Angeles ridge west of summit of Mt. Waterman 2286 Comment
  RSA97430  Arceuthobium occidentale F. W. Peirson 1921-6-15 2322 Los Angeles Chilao, San Gabriel Mountains. 1646 Comment
  RSA97432  Lomatium mohavense subsp. mohavense F. W. Peirson 1926-4-26 6655 -a Los Angeles about 1 mile east of Palmdale Comment
  RSA97442  Phoradendron bolleanum F. W. Peirson 1918-6-16 32 Los Angeles West of Acton, north base of San Gabriel Mts. 915 Comment
  RSA97443  Phoradendron macrophyllum F. W. Peirson 1918-11 1717 Los Angeles Above Camp Baldy, San Antonio Canyon, San Gabriel Mts. 1341 Comment
  RSA97451  Phoradendron villosum F. W. Peirson 1921-11-12 31 Los Angeles Collins Ranch, Liebre Mts. 1372 Comment
  RSA98322  Oenanthe sarmentosa F. W. Peirson 1908-5-22 804 Los Angeles Bixby Ranch near Long Beach. Comment
  RSA98334  Berula erecta F. W. Peirson 1920-6-22 2206 Los Angeles Bassett, near El Monte. Comment
  RSA99341  Sambucus mexicana F. W. Peirson 1921-7-21 8650 Los Angeles Arraster Creek, San Gabriel Mountains. 945 Comment
  RSA99343  Sambucus mexicana F. W. Peirson 1919-4-24 391 Los Angeles Small Canyon E of Rubio Canyon 548 Comment
  RSA99352  Symphoricarpos rotundifolius var. parishii F. W. Peirson 1922-7-5 4506 Los Angeles Big Pines. Northeast portion of San Gabriel Mountains. 2104 Comment
  RSA99372  Lonicera hispidula var. vacillans F. W. Peirson 1951-8-7 4502 Los Angeles Sturdevant's Camp, Big Santa Anita Canyon. 1067 Comment
  SBBG98216  Pentagramma triangularis subsp. triangularis F. W. Peirson 1919-12-2 1502 Los Angeles W Fk of Rubio Cyn 746 Comment
  SD120819  Leptosiphon liniflorus Frank W. Peirson 1919-6-7 456 Los Angeles Cow Canyon Divide. 1372 Comment
  SD82795  Viola purpurea subsp. mohavensis F. W. Peirson 1919-5-10 745 Los Angeles Trail to Mt. Gleason, San Gabriel Mountains. 1735 Comment
  SD87527  Allium peninsulare Frank W. Peirson 1920-5-6 509 Los Angeles San Gabriel Mountains, Fish Canyon Falls. Comment
  SD87664  Silene verecunda subsp. platyota F. W. Peirson 1920-9-15 2284 Los Angeles North slope Baldy. 2820 Comment
  SD87685  Allium peninsulare Frank W. Peirson 1923-5-21 Los Angeles San Gabriel Mountains, Fish Canyon. Comment
  SD87770  Nemacladus sigmoideus Frank W. Peirson 1927-5-7 7265 Los Angeles 4.0 miles east of Lancaster. Comment
  SD87806  Ribes aureum var. gracillimum Frank W. Peirson 1927-3-19 7113 Los Angeles Seminole Hot Springs Region, Santa Monica Mountains. In the old Stone Cabin Meadow, a mile or two back in the Range. Comment
  SEINET10458414  Nemacladus longiflorus Frank W. Peirson 1921-6-21 Peirson 2453 Los Angeles West Fork of San Gabriel River 640 Comment
  SEINET10461064  Nemacladus ramosissimus Frank W. Peirson 1918-6-4 Peirson 220 Los Angeles Foothills east of Rubio Canyon, San Gabriel Mountains 610 Comment
  SEINET10840483  Heterocodon rariflorum Frank W. Peirson 1921-6-14 Peirson 1210 Los Angeles TRAIL FORK OF SAN GABRIEL RIVER Comment
  UC218118  Clarkia heterandra F. W. Peirson 1922-6-3 Los Angeles Liebre Mts. 1143 Comment
  UC219126  Camelina microcarpa F. W. Peirson 1922-7-7 3181 Los Angeles San Gabriel Mountains, Swartout Valley, Ranger's Cabin Swartout Valley; San Gabriel Mountains, , Ranger's Cabin 1798 Comment
  UC501457  Clarkia cylindrica subsp. cylindrica Frank W. Peirson 1922-6-3 771 Los Angeles Collin Ranch, n slope of mts. Liebre Mts. 1219 Comment
  UC501517  Chenopodium pumilio Frank W. Peirson 1919-11-12 1823 Los Angeles Hollister Ave between The Boulevard and Mendocino St.; Altadena Comment
  UC501519  Chenopodium multifidum Frank W. Peirson 1920-10-1 2291 Los Angeles near corner of Broadway and Union Streets; Pasadena Comment
  UC566787  Sanicula arguta Frank W. Peirson 1923-5-14 3489 Los Angeles Arroyo Seco 335 Comment
  UC908538  Eriastrum sapphirinum Frank W. Peirson 1921-7-1 2829 Los Angeles Mint Canyon Comment
  UC908733  Collomia grandiflora Frank W. Peirson 1924-5-28 4634 Los Angeles Tujunga Canyon 457 Comment
  UC908992  Saltugilia splendens subsp. grantii Frank W. Peirson 1938-6-2 7933 Los Angeles South Fork Rock Cr San Gabriel Mts., S Fork Rock Cr 1981 Comment
  UCD53222  Arctostaphylos patula F. W. Peirson 1918-6-17 143 Los Angeles Summit of North 'Baldy'; San Gabriel Mountains. Comment
  UCSB24350  Potamogeton amplifolius Peirson, Frank 1921-6-19 Los Angeles Crystal Lake, San Gabriel Mountains 1676 Comment



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