Search Results — 2000 specimen records retrieved (1054 records with coordinates)
(That's the default maximum. Contact Jason Alexander for larger data requests.)

Results for search: County=LOS ANGELES; Source=All; Collector=Peirson;   

Mapping Options:

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

Download Options:
Select all records · Select records with coordinates

Include annotations and voucher information

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

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

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

Click on column header to sort data (* sorts by family); click in leftmost checkbox to select record. CCH Help Page.
Turn on yellow flags to show possible range discrepancies. Read more ...
? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  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-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-BC145074  Phacelia mohavensis Frank W. Peirson 1922-7-5 3164 Los Angeles On Mescal Creek, 1 mile west of Big Pines, San Gabriel Mts. 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-BC158001  Garrya veatchii F. W. Peirson 1919-11-30 2723 Los Angeles Eaton Canyon, San Gabriel Mts. 609 Comment
  CAS-BOT-BC159275  Garrya veatchii Frank W. Peirson 1919-11-30 2723 Los Angeles Eaton Canyon 609 Comment
  CAS-BOT-BC178567  Vulpia myuros var. myuros F. W. Peirson 1921-3-6 2360 Los Angeles San Gabriel Wash 213 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-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-BC185859  Vulpia octoflora var. hirtella F. W. Peirson 1918-5-19 1567 Los Angeles Millards Canyon, San Gabriel Mts. Comment
  CAS-BOT-BC185944  Vulpia octoflora var. octoflora F. W. Peirson 1920-5-3 2124 Los Angeles Little Tujunga Wash, San Fernando Valley 335 Comment
  CAS-BOT-BC204749  Acmispon argophyllus var. argenteus Frank W. Peirson 1923-4-9 3468 Los Angeles 2 miles S.-E. of Wilsons [Wilson] Cove, San Clemente Comment
  CAS-BOT-BC205151  Lupinus elatus F. W. Peirson; Bulletin Torrey Club 1921-6-16 2438 Los Angeles Waterman Ridge Comment
  CAS-BOT-BC206225  Malacothamnus fasciculatus Frank W. Peirson 1918-10-26 114 Los Angeles Big Dalton Canyon, San Gabriel Mts. 762 Comment
  CAS-BOT-BC207241  Lupinus peirsonii Frank W. Peirson 1930-5-30 8904 Los Angeles Rock Cr., San Gabriel Range 1371 Comment
  CAS-BOT-BC207252  Lupinus peirsonii Frank W. Peirson 1930-5-30 8904 Los Angeles Rock Creek, San Gabriel Mts. 1371 Comment
  CAS-BOT-BC208865  Lupinus breweri var. breweri F. W. Peirson 1921-6-16 2441 Los Angeles Mt. Waterman, N summit. 2316 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-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-BC240947  Collinsia parryi Frank W. Peirson 1923-5-21 3514 Los Angeles Fish Canyon, San Gabriel Mts. 731 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-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-BC268174  Eriogonum umbellatum var. minus Frank W. Peirson 1920-9-12 21 Los Angeles Summit San Antonio Peak (Baldy) 3048 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-BC276892  Chaenactis fremontii F. W. Peirson 1921-5-19 2409 Los Angeles Little Rock Creek, N slope of San Gabriel Mountains 960 Comment
  CAS-BOT-BC277527  Chaenactis glabriuscula var. lanosa F. W. Peirson; Alice Ottley 1920-5-3 2121 Los Angeles Little Tujunga Wash at road crossing, San Gabriel Mts. 335 Comment
  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-BC279533  Chaenactis artemisiifolia F. W. Peirson 1919-7-3 242 Los Angeles Lukens Peak, San Gabriel Mts. 914 Comment
  CAS-BOT-BC296180  Erigeron foliosus var. foliosus F. W. Peirson 1920-5-12 231 Los Angeles San Gabriel Wash near Foothill Boulevard 182 Comment
  CAS-BOT-BC298049  Ericameria nauseosa var. mohavensis Frank W. Peirson 1928-9-5 8192 Los Angeles Lower part of road from Rock Creek to Big Pines, San Gabriel Mts 1280 Comment
  CAS-BOT-BC310101  Hemizonella minima Frank W. Peirson 1920-6-10 238 Los Angeles San Gabriel Mts. Summit Mt. Wilson Comment
  CAS-BOT-BC310840  Heterotheca sessiliflora subsp. fastigiata Frank W. Peirson 1921-10-9 4735 Los Angeles San Gabriel Mts. Delta Canon [Canyon], Tujunga Trib'y Comment
  CAS-BOT-BC311264  Heterotheca sessiliflora subsp. echioides F. W. Peirson 1923-10-7 4163 Los Angeles Newhall at Railway Station, San Gabriel Mts. Comment
  CAS-BOT-BC31778  Carex mesochorea Frank W. Peirson 1929-5-10 a.n. Los Angeles Introduced in a lawn in Pasadena Comment
  CAS-BOT-BC326712  Pleiacanthus spinosus Frank W. Peirson 1923-8-30 4742 Los Angeles North of Big Pines, San Gabriel Mts. 2225 Comment
  CAS-BOT-BC329381  Lepidospartum latisquamum Frank W. Peirson 1928-9-5 8194 Los Angeles Swartout Valley [this sp. also found in Sheep Creek] 2011 Comment
  CAS-BOT-BC32998  Calystegia peirsonii Frank Warrington Peirson 1923-5-27 3537 Los Angeles San Gabriel Mts. Rock Cr. 1295 Comment
  CAS-BOT-BC341212  Senecio lyonii Frank W. Peirson 1923-4-12 3478 Los Angeles Wilson's Cove, San Clemente Is. Comment
  CAS-BOT-BC356543  Pseudognaphalium biolettii Frank W. Peirson 1923-4-12 3465 Los Angeles Wilsons Cove. San Clemente Is. Comment
  CAS-BOT-BC380176  Layia platyglossa Frank W. Peirson 1923-4-9 3430 Los Angeles San Clemente Island; Wilson's Cove Comment
  CAS-BOT-BC384174  Forestiera pubescens subsp. parvifolia Frank W. Peirson 1919-6-13 483 Los Angeles San Gabriel Mts. Rock Cr. Comment
  CAS-BOT-BC422743  Meconella denticulata Frank W. Peirson 1925-4-23 5806 Los Angeles San Gabriel Canyon below Forks 365 Comment
  CAS-BOT-BC46727  Arctostaphylos parryana Frank W. Peirson 1942-10-15 13434 Los Angeles Carleton Flats. San Gabriel Mts. Hill top in camp. 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-BC92818  Clematis pauciflora Frank W. Peirson 1921-3-6 2362 Los Angeles San Gabriel Wash. 213 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
  JEPS10622  Castilleja exserta subsp. exserta Frank W. Peirson 1919-3-27 334 Los Angeles w of Arroyo Seco; San Gabriel Mountains 457 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
  JEPS11117  Penstemon labrosus Frank W. Peirson 1918-6-30 204 Los Angeles summit of Mt. Wilson San Gabriel Mountains, summit of Mt. Wilson 1752 Comment
  JEPS11217  Keckiella ternata Frank W. Peirson 1918-8-6 263 Los Angeles Mt. Wilson; San Gabriel Mountains 1584 Comment
  JEPS11303  Nuttallanthus texanus Frank W. Peirson 1918-6-12 187 Los Angeles San Gabriel Mountains, Foothills e of Rubio Canyon Rubio Canyon; San Gabriel Mountains 609 Comment
  JEPS11572  Keckiella cordifolia Frank W. Peirson 1924-6-16 Los Angeles Pasadena Comment
  JEPS11573  Penstemon centranthifolius Frank W. Peirson 1918-6-16 207 Los Angeles Rock Creek n side of San Gabriel Mountains, Rock Creek 1447 Comment
  JEPS11603  Penstemon spectabilis var. subviscosus Frank W. Peirson 1924-6-16 Los Angeles foothills near Pasadena; San Gabriel Mountains, foothills near Pasadena Comment
  JEPS11668  Orobanche californica subsp. feudgei Frank W. Peirson 1921-7-3 2489 Los Angeles San Gabriel Mountains. Ridge south of Swartout Valley. 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
  JEPS1188  Phacelia minor F. W. Peirson 1918-6-4 162 Los Angeles foothills e Rubio Canyon; San Gabriel Mountains 609 Comment
  JEPS12079  Solanum douglasii Frank W. Peirson 1918-10-15 282 Los Angeles Rubio Canyon; San Gabriel Mountains, Rubio Canyon 701 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
  JEPS12284  Nicotiana attenuata Frank W. Peirson 1919-6-14 495 Los Angeles Rock Creek; San Gabriel Mountains 1524 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
  JEPS12500  Nicotiana glauca Frank W. Peirson 1919-3-27 352 Los Angeles Arroyo Seco; San Gabriel Mountains 381 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
  JEPS12807  Lonicera interrupta Frank W. Peirson 1918-6-15 264 Los Angeles Mint Canyon San Gabriel Mountains 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
  JEPS1287  Phacelia tanacetifolia Frank W. Peirson 1920-3-28 2101 Los Angeles Tujunga 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
  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
  JEPS15945  Osmorhiza brachypoda Frank W. Peirson 1918-5-19 135 Los Angeles Millards Canyon San Gabriel Mountains Comment
  JEPS16106  Lomatium dissectum var. multifidum Frank W. Peirson 1922-7-6 3187 Los Angeles San Antonio Mts., Big Pines 2072 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
  JEPS1713  Eucrypta chrysanthemifolia var. chrysanthemifolia Frank W. Peirson 1918-6-10 167 Los Angeles foothills e Rubio Canyon; San Gabriel Mountains 609 Comment
  JEPS17762  Calochortus invenustus Frank W. Peirson 1918-6-17 9 Los Angeles Head of Rock Creek San Gabriel Mountains 1981 Comment
  JEPS17815 Image available Calochortus clavatus var. gracilis Frank W. Peirson 1921-6-21 2468 Los Angeles West Fork San Gabriel River San Gabriel Mountains 685 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
  JEPS18566  Brickellia microphylla var. microphylla Frank W. Peirson 1921-10-22 2599 Los Angeles head of Eaton Canyon, San Gabriel Mountains, just under the precipitous wall of rock that rises the the San Gabriel Peak San Gabriel Moutains, Eaton Canyon 1645 Comment
  JEPS18578  Brickellia californica Frank W. Peirson 1918-10-21 221 a Los Angeles West Fork San Gabriel River San Gabriel Mountains, West Fork San Gabriel River 1066 Comment
  JEPS18579  Brickellia californica Frank W. Peirson 1918-9-7 221 Los Angeles Head of Eaton Creek San Gabriel Mountains, Eaton Creek 1554 Comment
  JEPS18979  Gutierrezia microcephala Frank W. Peirson 1923-9-1 4016 Los Angeles Sheep Creek San Gabriel Mountains, Sheep Creek 1524 Comment
Read comments
Aug 14 2013
  JEPS18984  Gutierrezia sarothrae Frank W. Peirson 1918-10-16 277 Los Angeles entrance to canyon Pacoima Canyon; San Gabriel Mountains, Pacoima Canyon 457 Comment
  JEPS19123  Isocoma menziesii var. vernonioides Frank W. Peirson 1921-11-11 2596 Los Angeles Saugus 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
  JEPS19139  Ericameria pinifolia Frank W. Peirson 1918-10-16 268 Los Angeles Pacoima Canyon San Gabriel Mountains, Pacoima Canyon 518 Comment
  JEPS19140  Ericameria pinifolia Frank W. Peirson 1918-8-17 223 Los Angeles San Antonio Canyon San Gabriel Mountains, San Antonio Canyon 1371 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
  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
  JEPS1986  Phacelia grandiflora F. W. Peirson 1918-6-4 159 Los Angeles foothills e Rubio Canyon; San Gabriel Mountains 609 Comment
  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
  JEPS20559  Lessingia glandulifera var. glandulifera Frank W. Peirson 1918-10-16 278 Los Angeles entrance to Pacoima Canyon; San Gabriel Mountains, entrance to Pacoima Canyon 457 Comment
  JEPS2056  Phacelia fremontii Frank W. Peirson 1919-5-10 400 Los Angeles Arraster Creek San Gabriel Mountains 914 Comment
  JEPS20885  Logfia filaginoides Frank W. Peirson 1918-6-4 233 Los Angeles foothills e Rubio Canon; San Gabriel Mountains, Rubio Canon 609 Comment
  JEPS2116  Phacelia austromontana Frank W. Peirson 1928-6-2 7940 Los Angeles South Fork Rock Creek San Gabriel Range 1828 Comment
  JEPS21269  Baccharis salicifolia subsp. salicifolia Frank W. Peirson 1918-10-15 283 Los Angeles foot of trail, Rubio Canyon, San Gabriel Mountains Echo Mtn.; San Gabriel Mountains, Rubio Canyon 548 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
  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
  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
  JEPS26404  Malacothamnus orbiculatus Frank W. Peirson 1919-6-15 502 Los Angeles San Gabriel Mountains, Rock Creek 1249 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
  JEPS26956  Senecio astephanus Frank W. Peirson 1920-6-10 1432 Los Angeles near Inspiration Point (on Mt. Lowe); San Gabriel Mts., Mt. Lowe 1371 Comment
  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
  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
  JEPS27573  Gayophytum oligospermum Frank W. Peirson 1921-7-3 2483 Los Angeles Vincent Gulch San Gabriel Mountains 1981 Comment
  JEPS27588  Gayophytum heterozygum F. W. Peirson 1918-6-30 130 Los Angeles Mt. Wilson San Gabriel Mountains (near summit) 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
  JEPS31725  Camissonia strigulosa Frank W. Peirson 1919-3-30 344 Los Angeles Tujunga Canyon San Gabriel Mountains 441 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
  JEPS32439  Solidago velutina subsp. californica F. W. Peirson 1918-9-16 230 Los Angeles Mt. San Antonio 1371 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
  JEPS34120  Encelia actoni F. W. Peirson 1919-6-13 484 Los Angeles Rock Creek San Gabriel Mts., Rock Creek 1295 Comment
  JEPS34174  Chaenactis glabriuscula var. glabriuscula F. W. Peirson 1921-5-19 1399 Los Angeles Little Rock Creek San Gabriel Mts., Little Rock Creek 975 Comment
  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
  JEPS34547  Allium lacunosum Frank W. Peirson 1919-5-10 426 Los Angeles Arrastre Creek San Gabriel Mountains 853 Comment
Read comments
Jan 1 2017
  JEPS34680  Venegasia carpesioides F. W. Peirson 1921-4-10 1365 Los Angeles San Dimas Canyon San Gabriel Mts., San Dimas Canyon 426 Comment
  JEPS34715  Eriophyllum confertiflorum var. confertiflorum F. W. Peirson 1919-5-10 409 Los Angeles Arraster Canyon San Gabriel Mts., Arraster Canyon 838 Comment
Read comments
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
Read comments
Dec 10 2014
  JEPS34717  Eriophyllum confertiflorum var. confertiflorum F. W. Peirson 1918-6-28 239 Los Angeles foot-hills e Rubio Canyon; San Gabriel Mts. 609 Comment
  JEPS34900  Hulsea vestita subsp. gabrielensis F. W. Peirson 1921-6-15 2440 Los Angeles between Pine Flats and Chilao; San Gabriel Mts. 1676 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
  JEPS35962  Anisocoma acaulis F. W. Peirson 1921-5-19 1468 Los Angeles Little Rock Creek; San Gabriel Mts. 1036 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
  JEPS36843  Stephanomeria pauciflora F. W. Peirson 1918-8-16 250 Los Angeles San Antonio Canyon San Gabriel Mountains 1371 Comment
  JEPS36880  Stephanomeria exigua subsp. coronaria Frank W. Peirson 1923-8-31 4014 Los Angeles Blue Ridge San Gabriel Mountains 2529 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
  JEPS36931  Artemisia dracunculus F. W. Peirson 1918-10-16 272 Los Angeles Pacoima Canyon San Gabriel Mts., Pacoima Canyon 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
  JEPS37112  Lepidospartum latisquamum Frank W. Peirson 1923-9-1 4017 Los Angeles w end Swarthout Valley (about 1 mi e of Big Pines at the Divide); San Gabriel Mountains, Swartout Valley 2011 Comment
  JEPS37115  Lepidospartum latisquamum Frank W. Peirson 1928-9-5 8194 Los Angeles Swartout Valley 2011 Comment
  JEPS37244  Packera ionophylla F. W. Peirson 1919-6-14 475 Los Angeles Rock Creek Canyon San Gabriel Mts. 1752 Comment
  JEPS37246  Senecio triangularis F. W. Peirson 1921-7-17 2509 Los Angeles San Gabriel River, Prairie Fork San Gabriel Mts. 2133 Comment
  JEPS37252  Senecio flaccidus var. douglasii F. W. Peirson 1918-6-28 247 Los Angeles Lower Rubio Canyon San Gabriel Mts. 579 Comment
  JEPS37335  Quercus chrysolepis Frank W. Peirson 1918-5-19 16 Los Angeles Echo Mountain San Gabriel Range 1036 Comment
  JEPS37498  Packera ionophylla F. W. Peirson 1919-6-16 476 Los Angeles South Fork of Rock Creek San Gabriel Mountains 1676 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
  JEPS38025  Quercus kelloggii Frank W. Peirson Jul 3 1921-May 26 1923 1708 Los Angeles Rock Creek San Gabriel Mountains Comment
Read comments
Mar 29 2014
  JEPS38026  Quercus Frank W. Peirson 1919-5-11 404 Los Angeles Arraster Creek San Gabriel Mountains Comment
  JEPS38027  Quercus agrifolia Frank W. Peirson 1919-4-5 369 Los Angeles Mt. Wilson Toll Road San Gabriel Mountains Comment
  JEPS38441  Salix laevigata Frank W. Peirson 1919-3-30 359 Los Angeles San Gabriel Mts., Big Tujunga Canyon Comment
  JEPS38496  Salix exigua Frank W. Peirson 1919-3-30 355 Los Angeles Tujunga Canyon San Gabriel Mts. Comment
  JEPS38673  Arctostaphylos glandulosa subsp. glandulosa F. W. Peirson 1918-5-19 142 Los Angeles 2 mi n Altadena; San Gabriel Mts., Echo Mountain 1036 Comment
  JEPS38733  Arctostaphylos glauca F. W. Peirson 1919-1-29 315 Los Angeles trail San Gabriel Mts., Mt. Lowe 1341 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
  JEPS39204  Layia glandulosa F. W. Peirson 1919-3-30 345 Los Angeles Big Tujunga Canyon, San Gabriel Mts. 426 Comment
  JEPS39229  Epilobium ciliatum subsp. ciliatum F. W. Peirson 1918-7-13 125 Los Angeles Santa Anita Canyon San Gabriel Mts. 975 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
  JEPS39440  Ambrosia salsola var. salsola F. W. Peirson 1921-5-19 1316 Los Angeles Little Rock Cr. San Gabriel Mts., Little Rock Cr. 944 Comment
  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
  JEPS40241  Vitis girdiana Frank W. Peirson 1919-5-18 442 Los Angeles Monrovia Canyon San Gabriel Mts. 365 Comment
  JEPS40715  Dieteria canescens var. canescens Frank W. Peirson 1923-8-30 4008 Los Angeles Mescal Creek San Gabriel Mountains (very head) Comment
  JEPS4112  Gilia ochroleuca subsp. vivida Frank W. Peirson 1918-6-30 155 Los Angeles summit Mt. Wilson San Gabriel Mts., Mt. Wilson Comment
  JEPS41458  Erigeron breweri var. jacinteus F. W. Peirson 1922-7-21 3204 Los Angeles Little Baldy San Gabriel Mountains (summit) 2910 Comment
Read comments
Dec 10 2014
  JEPS41486  Erigeron foliosus var. foliosus Frank W. Peirson 1918-7-13 231 Los Angeles Santa Anita San Gabriel Mts., Santa Anita 914 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
Read comments
Jul 24 2018
  JEPS41979  Rhamnus crocea Frank W. Peirson 1919-3-27 339 Los Angeles w of Arroyo Seco; San Gabriel Mountains 396 Comment
  JEPS41981  Rhamnus ilicifolia Frank W. Peirson 1918-6-18 287 Los Angeles Devils Punch Bowl San Gabriel Mts. 1219 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
  JEPS42304  Ceanothus greggii var. vestitus F. W. Peirson 1919-5-10 415 Los Angeles Mt. Gleason; San Gabriel Mts., Mt. Gleason 1219 Comment
  JEPS42305  Ceanothus greggii var. vestitus F. W. Peirson 1919-6-14 415 a Los Angeles san Gabriel Mts. 1371 Comment
  JEPS42336  Ceanothus spinosus Frank W. Peirson 1921-2-26 733 Los Angeles Topanga Canyon SW Los Angeles Co., Santa Monica Mountains 457 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
  JEPS42399  Ceanothus integerrimus Frank W. Peirson 1918-5-26 111 Los Angeles Toll Rd San Gabriel Range, Mt. Wilson 1143 Comment
  JEPS42402  Ceanothus crassifolius Frank W. Peirson 1919-1-19 302 a Los Angeles foot of Rubio Canyon; San Gabriel Mts., foot of Rubio Canyon 548 Comment
  JEPS42403  Ceanothus crassifolius Frank W. Peirson 1918-5-19 302 Los Angeles Millards Canyon San Gabriel Mountains 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
  JEPS42476  Marah macrocarpa Frank W. Peirson 1919-1-25 308 Los Angeles Arroyo Seco San Gabriel Mountains 365 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
  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
  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
  JEPS42951  Potamogeton illinoensis Frank W. Peirson 1921-6-19 2469 Los Angeles Crystal Lake; San Gabriel Mountains 1676 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
  JEPS43186  Claytonia parviflora subsp. parviflora F. W. Peirson 1918-5-27 35 Los Angeles Henninger Flats 868 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
  JEPS43692  Clarkia xantiana Frank W. Peirson 1923-5-27 3535 Los Angeles Rock Creek San Gabriel Mts. 1295 Comment
  JEPS43697  Clarkia bottae Frank W. Peirson 1919-5-18 432 Los Angeles Monrovia Canyon San Gabriel Mountains 304 Comment
  JEPS43807  Saxifraga californica Frank W. Peirson 1919-4-19 373 Los Angeles Pacoima Canyon; San Gabriel Mountains, Pacoima Canyon 533 Comment
  JEPS43825  Clarkia dudleyana Frank W. Peirson 1919-6-7 466 Los Angeles Cow Canyon Divide San Gabriel Mountains 1371 Comment
  JEPS43895  Mentzelia ravenii Frank W. Peirson 1919-5-10 395 Los Angeles San Gabriel Mountains, Arraster Creek 914 Comment
Read comments
Feb 20 2013
  JEPS4390  Trifolium variegatum Frank W. Peirson 1921-5-19 2417 Los Angeles Little Rock Creek San Gabriel Mtns 1005 Comment
  JEPS43923  Fraxinus dipetala Frank W. Peirson 1919-4-19 383 Los Angeles Pacoima Canyon San Gabriel Mountains 609 Comment
  JEPS43972  Oenothera elata subsp. hirsutissima Frank W. Peirson 1918-8-18 127 Los Angeles San Antonio Canyon San Gabriel Mts. 1341 Comment
  JEPS44022  Epilobium canum subsp. canum Frank W. Peirson 1918-10-21 280 Los Angeles West Fork San Gabriel River 1066 Comment
  JEPS44023  Epilobium canum subsp. latifolium Frank W. Peirson 1920-9-13 2282 Los Angeles San Antonio Canyon San Gabriel Mountains 2133 Comment
  JEPS44040  Epilobium canum subsp. latifolium Frank W. Peirson 1918-6-30 123 Los Angeles Trail from Mt. Lowe to Mt. Wilson. 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
  JEPS44249  Drymocallis lactea var. lactea Frank W. Peirson 1921-7-17 2678 Los Angeles Prairie Fork San Gabriel Mts., Prairie Fork 2057 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
  JEPS44525  Horkelia rydbergii Frank W. Peirson 1921-6-15 2448 Los Angeles San Gabriel Mts., Pine Flats stream [Charlton Flat] 1524 Comment
Read comments
Jul 29 2016
  JEPS44759  Rubus leucodermis Frank W. Peirson 1919-6-16 494 Los Angeles South Fork Rock Creek San Gabriel Mts., South Fork Rock Creek 1981 Comment
  JEPS44765  Rubus ursinus Frank W. Peirson 1919-4-19 380 Los Angeles Pacoima Canyon San Gabriel Mts., Pacoima Canyon 609 Comment
  JEPS44773  Rubus parviflorus F. W. Peirson 1921-6-17 1958 Los Angeles on Chilao-Islip Trail at crossing Little Rock (San Gabriel Mts.); , crossing of Little Rock 1981 Comment
  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
Read comments
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
  JEPS45138 Image available Amelanchier utahensis Frank W. Peirson 1920-5-29 2155 Los Angeles Icehouse Canyon; San Gabriel Mts. 1981 Comment
Read comments
Dec 10 2014
  JEPS45151  Amelanchier utahensis Frank W. Peirson 1911-1 Los Angeles Lower Rock Creek; San Gabriel Mountains Comment
  JEPS45538  Cercocarpus betuloides var. betuloides Frank W. Peirson 1919-3-27 340 Los Angeles road out of Arroyo Seco San Gabriel Mountains 533 Comment
  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
  JEPS45975  Lythrum californicum Frank W. Peirson 1918-10-16 291 Los Angeles San Gabriel Mountains, Pacoima Canyon Pacoima Canyon; San Gabriel Mountains, Pacoima Canyon 487 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
  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
  JEPS46973  Centaurium exaltatum Frank W. Peirson 1921-7-2 2482 Los Angeles Pallett Creek San Gabriel Mountains 1097 Comment
  JEPS47656  Lithophragma affine Frank W. Peirson 1918-5-19 69 Los Angeles Millard's Canyon; San Gabriel Mountains, Millard's Canyon 609 Comment
  JEPS47702  Berberis aquifolium var. dictyota Frank W. Peirson 1918-6-1 54 Los Angeles Eaton Canyon; San Gabriel Mts 609 Comment
  JEPS47798  Asclepias californica Frank W. Peirson 1919-6-15 496 Los Angeles Rock Creek; San Gabriel Mts. 1981 Comment
  JEPS49258  Ribes velutinum Frank W. Peirson 1918-7-8 70 Los Angeles Baldy e trail San Gabriel Range 2865 Comment
  JEPS49281  Ribes amarum Frank W. Peirson 1919-4-5 316 Los Angeles Toll Road San Gabriel Range 1066 Comment
Read comments
Dec 10 2014
  JEPS49350  Ribes malvaceum var. viridifolium Frank W. Peirson 1919-5-18 71 Los Angeles ridge between Monrovia Canyon and Fish Canyon 1066 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
  JEPS49664  Boykinia rotundifolia Frank W. Peirson 1918-7-13 74 Los Angeles Santa Anita Canyon 975 Comment
  JEPS49740  Heuchera abramsii Frank W. Peirson 1922-7-21 3207 Los Angeles Baldy Mt. San Antonio; San Gabriel Mts, Mt. San Antonio 2956 Comment
  JEPS49796  Apocynum androsaemifolium Frank W. Peirson 1921-7-3 882 Los Angeles Vincent Gulch just below Rock Creek Divide; San Gabriel Mts., Vincent Gulch 2011 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
  JEPS49900  Dudleya cymosa subsp. pumila Frank W. Peirson 1918-7-7 262 Los Angeles Ontario Ridge San Gabriel Mtns 2590 Comment
  JEPS49902  Dudleya cymosa subsp. pumila Frank W. Peirson 1919-5-14 452 Los Angeles Eaton Canyon, San Gabriel Mtns 685 Comment
Read comments
Dec 9 2015
  JEPS49954  Asclepias fascicularis Frank W. Peirson 1918-8-18 149 Los Angeles San Antonio Canyon; San Gabriel Mts. 1341 Comment
  JEPS49975  Dudleya densiflora Frank W. Peirson 1919-7-1 517 Los Angeles Fish Canyon San Gabriel Mtns 274 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
  JEPS51094  Stellaria nitens Frank W. Peirson 1918-5-26 43 Los Angeles Henninger Flats 868 Comment
  JEPS51335  Cerastium glomeratum Frank W. Peirson 1919-5-18 438 Los Angeles Monrovia Canyon San Gabriel Mts., Monrovia Canyon 457 Comment
  JEPS51428  Minuartia douglasii Frank W. Peirson 1919-4-19 367 Los Angeles Pacoima Canyon San Gabriel Mountains 548 Comment
  JEPS5153  Castilleja applegatei subsp. martinii F. W. Peirson 1918-5-19 209 Los Angeles Millards Canyon San Gabriel Mountains 853 Comment
  JEPS51534  Meconella denticulata Frank W. Peirson 1918-5-19 36 Los Angeles Millards Canyon San Gabriel Mtns 609 Comment
  JEPS51563  Papaver californicum Frank W. Peirson 1921-4-10 2397 Los Angeles San Gabriel Mountains, San Dimas Canyon San Dimas Canyon; San Gabriel Mountains, San Dimas Canyon 533 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
  JEPS51798  Eschscholzia minutiflora Frank W. Peirson 1919-6-15 487 Los Angeles Rock Creek San Gabriel Mountains 1295 Comment
  JEPS51887  Chamaesyce albomarginata Frank W. Peirson 1919-6-13 459 Los Angeles San Gabriel Mtns, Rock Creek Canyon 1295 Comment
  JEPS519  Allium monticola Frank W. Peirson 1918-6-17 267 Los Angeles Head of Rock Cr, Rock Cr. 1981 Comment
Read comments
Oct 16 2006
  JEPS51907  Euphorbia palmeri Frank W. Peirson 1922-7-6 3184 Los Angeles Big Pines; San Gabriel Mountains 2072 Comment
  JEPS520  Allium monticola F. W. Peirson 1918-6-10 1 Los Angeles divide between Lowe and Markham 1630 Comment
Read comments
Oct 16 2006
  JEPS5222  Castilleja applegatei subsp. martinii Frank W. Peirson 1921-7-17 2505 Los Angeles Prairie Fork San Gabriel Mountains, San Gabriel River 2011 Comment
  JEPS52365  Chamaesyce serpyllifolia Frank W. Peirson 1921-6-20 2445 Los Angeles San Gabriel Mtns, San Gabriel River, North Fork 457 Comment
  JEPS52466  Croton californicus Frank W. Peirson 1918-10-16 276 Los Angeles Pacoima Canyon San Gabriel Mts. (at entrance) 457 Comment
  JEPS52583  Calandrinia ciliata Frank W. Peirson 1919-3-30 356 Los Angeles Tujunga Canyon San Gabriel Mountains 441 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
  JEPS53182  Boechera sparsiflora Frank W. Peirson 1918-5-19 62 Los Angeles Echo Mountain San Gabriel Mts. 1036 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
  JEPS53397  Cardamine californica var. integrifolia Frank W. Peirson 1918-10-16 265 Los Angeles Pacoima Canyon San Gabriel Mts., Pacoima Canyon (San Gabriel Mountains) 548 Comment
  JEPS53437  Descurainia pinnata Frank W. Peirson 1919-1-25 309 Los Angeles Arroyo Seco; San Gabriel Mountains 381 Comment
  JEPS53579  Erysimum capitatum var. capitatum Frank W. Peirson 1919-3-27 337 Los Angeles Arroyo Seco Canyon San Gabriel Mountains 411 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
  JEPS53892  Sisymbrium altissimum Frank W. Peirson 1918-5-26 61 Los Angeles Henninger Flats; San Gabriel Range, Henninger Flats 868 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
  JEPS5409  Nemacladus longiflorus var. longiflorus Frank W. Peirson 1921-6-21 2453 Los Angeles San Gabriel Mountains, West Fork of San Gabriel River San Gabriel Mountains, West Fork of San Gabriel River 640 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
  JEPS54602  Astragalus douglasii Frank W. Peirson 1919-5-10 397 Los Angeles Arrastre Canyon , Arrastre Canyon (San Gabriel Mts.) 975 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
Read comments
Feb 25 2015
  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
  JEPS55495  Lotus hamatus Frank W. Peirson 1920-5-16 2117 Los Angeles Tujunga San Gabriel Mts. 457 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
  JEPS56459  Eriogonum pusillum Frank W. Peirson 1921-5-19 2406 Los Angeles Little Rock Creek San Gabriel Mountains, Little Rock Creek Comment
  JEPS56460  Eriogonum pusillum Frank W. Peirson 1921-7-2 4203 Los Angeles Pallett Creek San Gabriel Mts., Pallett Creek Comment
  JEPS56524  Eriogonum roseum Frank W. Peirson 1921-11-11 2719 Los Angeles Elizabeth Lake Comment
  JEPS56588  Eriogonum nudum var. pauciflorum Frank W. Peirson 1918-8-17 20 Los Angeles San Antonio Canyon San Gabriel Mts. 1676 Comment
  JEPS56697  Eriogonum davidsonii Frank W. Peirson 1923-8-31 4005 Los Angeles Blue Ridge Comment
  JEPS56706  Eriogonum davidsonii Frank W. Peirson 1918-6-30 18 Los Angeles summit Mt. Wilson San Gabriel Mts., Mt. Wilson Comment
  JEPS56746  Eriogonum mohavense Frank W. Peirson 1919-5-11 407 Los Angeles Soledad Canyon San Gabriel Mountains, Soledad Canyon 807 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
  JEPS56972  Eriogonum fasciculatum var. foliolosum Frank W. Peirson 1919-1-26 305 Los Angeles Rubio Canyon San Gabriel Mountains, Rubio Canyon 548 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
  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
  JEPS57759  Chorizanthe staticoides Frank W. Peirson 1918-6-12 26 Los Angeles foothills e Rubio Canyon (San Gabriel Mountains); , foothills e Rubio Canyon 609 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
  JEPS58201  Linanthus aureus Frank W. Peirson 1919-3-30 343 Los Angeles Big Tujunga Canyon San Gabriel Mountains 426 Comment
  JEPS58202  Linanthus aureus Frank W. Peirson 1920-4-26 2111 Los Angeles Santa Anita Wash San Gabriel Mountains 213 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
  JEPS58395  Linanthus dichotomus Frank W. Peirson 1919-5-10 393 a Los Angeles Arraster Creek San Gabriel Mountains 914 Comment
  JEPS58396  Linanthus dichotomus Frank W. Peirson 1919-5-10 393 Los Angeles Arraster Creek San Gabriel Mountains 914 Comment
  JEPS58539  Linanthus parryae Frank W. Peirson 1921-5-20 940 Los Angeles Little Rock Creek San Gabriel Mountains 1066 Comment
  JEPS58608  Alnus rhombifolia Frank W. Peirson 1919-1 301 Los Angeles San Gabriel Mountains 579 Comment
  JEPS58687  Chrysolepis sempervirens Frank W. Peirson 1918-7-8 15 Los Angeles Baldy (= Mt. San Antonio); San Gabriel Mts. 2590 Comment
  JEPS58701  Juglans californica var. californica Frank W. Peirson 1919-4-19 375 Los Angeles Pacoima Canyon San Gabriel Mountains Comment
Read comments
Mar 28 2014
  JEPS58813  Pyrola dentata Frank W. Peirson 1921-7-17 2512 Los Angeles San Gabriel Mountains, Prairie Fork of the San Gabriel River 2133 Comment
  JEPS5902  Delphinium parryi Frank Peirson 1918-6-1 48 Los Angeles foothills e Rubio Canyon (n base of mts., back and slightly e of Altadena); San Gabriel Mountains 609 Comment
  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
  JEPS59156  Cirsium occidentale var. californicum Frank W. Peirson 1921-6-15 2504 Los Angeles San Gabriel Mts., San Gabriel River 609 Comment
  JEPS59717  Chenopodium ambrosioides Frank W. Peirson 1918-10-16 284 Los Angeles Pacoima Canyon 518 Comment
  JEPS59822  Grayia spinosa Frank W. Peirson 1921-5-19 1832 Los Angeles Little Rock Creek San Gabriel Mts., Little Rock Creek 975 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
  JEPS60560  Clematis ligusticifolia Frank W. Peirson 1918-10-21 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
  JEPS61154  Amsinckia intermedia Frank W. Peirson 1919-4-5 361 Los Angeles Hennigers Flats; San Gabriel Mountains 853 Comment
  JEPS61408  Geranium carolinianum Frank W. Peirson 1919-5-18 437 Los Angeles Monrovia Canyon San Gabriel Mountains 457 Comment
  JEPS61524  Allium monticola Frank W. Peirson 1923-5-25 3547 Los Angeles Rock Creek 1295 Comment
  JEPS61616  Calochortus albus Frank W. Peirson 1920-6-10 2163 Los Angeles Little Santa Anita Canyon San Gabriel Mountains 1066 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
  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
  JEPS61757 Image available Calochortus venustus Frank W. Peirson 1920-5-16 2146 Los Angeles Tujunga San Gabriel Mts. 457 Comment
  JEPS62190  Veratrum californicum var. californicum Frank W. Peirson 1922-7-6 3190 Los Angeles Big Pine Meadows San Gabriel Mountians 2087 Comment
  JEPS62229  Yucca whipplei Frank W. Peirson 1919-6-4 461 Los Angeles San Antonio Canyon San Gabriel Mountains, San Antonio Canyon 1447 Comment
  JEPS62525  Salvia apiana F. W. Peirson 1924-6-16 Los Angeles Pasadena 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
  JEPS63015  Stachys bullata F. W. Peirson 1919-5-18 439 Los Angeles Monrovia Canyon San Gabriel Mts. 457 Comment
  JEPS63182  Trichostema parishii Frank W. Peirson 1921-7-1 2473 Los Angeles Arraster Creek San Gabriel Mountains 1066 Comment
  JEPS63313  Monardella cinerea Frank W. Peirson 1918-6-8 182 Los Angeles Baldy (Mt. San Antonio); San Gabriel Mts. 2286 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
  JEPS63940  Toxicodendron diversilobum Frank W. Peirson 1919-3-6 325 Los Angeles Eaton Canyon San Gabriel Mts., Eaton Canyon 396 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
  JEPS64467  Platanthera sparsiflora Frank W. Peirson 1919-6-15 505 Los Angeles Rock Creek San Gabriel Mountains 1295 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
  JEPS64820  Glycyrrhiza lepidota Frank W. Peirson 1918-6-18 588 Los Angeles Rock Creek San Gabriel Mountains 1219 Comment
  JEPS65003  Lupinus bicolor Frank W. Peirson 1918-5-26 91 Los Angeles Henninger Flats San Gabriel Mts., Henninger Flats 868 Comment
  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
  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
  JEPS65472  Lupinus microcarpus var. densiflorus Frank W. Peirson 1919-6-15 489 Los Angeles Rock Creek; San Gabriel Mts., Rock Creek 1249 Comment
  JEPS65634  Hoita orbicularis Frank W. Peirson 1921-7-1 2474 Los Angeles Arraster Creek San Gabriel Mountains 944 Comment
  JEPS65650  Rupertia physodes F. W. Peirson 1918-5-26 93 Los Angeles Henninger Flats San Gabriel Mts. 868 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
  JEPS66249  Malosma laurina Frank W. Peirson 1918-6-28 105 Los Angeles Lower Rubio Canyon San Gabriel Mts., Lower Rubio Canyon 609 Comment
  JEPS66263  Rhus ovata Frank W. Peirson 1918-5-19 106 Los Angeles Millards Canyon 1036 Comment
  JEPS66275  Rhus trilobata Frank W. Peirson 1919-5-10 418 Los Angeles Arraster Creek; San Gabriel Mountains, Arraster Creek 914 Comment
Read comments
Aug 21 2014
  JEPS66574  Arbutus menziesii Frank W. Peirson 1919-4-5 140 Los Angeles Old Mt. Wilson Trail; San Gabriel Mountains, Sierra Madre, Old Mt. Wilson Trail 914 Comment
  JEPS66754  Garrya veatchii Frank W. Peirson 1918-5-27 139 Los Angeles n of Claremont; San Gabriel Mts., San Antonio Canyon 1371 Comment
  JEPS67037  Juncus nevadensis Frank W. Peirson 1922-7-7 3174 Los Angeles Ranger's Cabin San Gabriel Mountains, Swartout Valley 1798 Comment
  JEPS67078  Juncus xiphioides Frank W. Peirson 1919-6-15 488 Los Angeles Rock Creek San Gabriel Mountains 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
  JEPS67802  Cryptantha pterocarya Frank W. Peirson 1919-6-14 477 Los Angeles Rock Creek San Gabriel Mountains 1691 Comment
  JEPS69008  Eriastrum densifolium Frank W. Peirson 1919-7-29 521 Los Angeles Mt. Wilson San Gabriel Mts. (summit) 1767 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
  JEPS69443  Gilia angelensis Frank W. Peirson 1919-3-30 157 a Los Angeles Tujunga Canyon San Gabriel Mountains, Tujunga Canyon 426 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
  JEPS69845  Leptodactylon californicum subsp. glandulosum Frank W. Peirson 1918-5-19 158 Los Angeles Echo Mountain; San Gabriel Mts., Echo Mountain 1005 Comment
  JEPS69925  Phlox douglasii subsp. rigida Frank W. Peirson 1922-7-6 3179 Los Angeles Blue Ridge San Gabriel Mountains 2286 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
  JEPS7146  Plantago major Frank W. Peirson 1919-6-5 462 Los Angeles San Antonio Canyon San Gabriel Mountains 1341 Comment
  JEPS73669  Monardella exilis Frank W. Peirson 1921-5-19 2416 Los Angeles Little Rock Creek San Gabriel Mts. 1036 Comment
  JEPS7519  Madia exigua Frank W. Peirson 1921-6-21 2446 Los Angeles w fork of the San Gabriel River San Gabriel Mts., Angeles National Forest 609 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
  JEPS79971  Rosa woodsii var. ultramontana Frank W. Peirson 1919-6-14 470 Los Angeles Big Rock Creek Canyon; San Gabriel Mts. 1676 Comment
  JEPS85628  Keckiella ternata var. ternata Frank W. Peirson 1918-8-6 263 Los Angeles Mt. Wilson; San Gabriel Mountains 1584 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
  JEPS8827  Castilleja linariifolia Frank W. Peirson 1921-7-2 2478 Los Angeles Pallett Creek; San Gabriel Mountains 1097 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
  JEPS9441  Galium hallii F. W. Peirson 1918-6-17 214 Los Angeles Rock Cr. San Gabriel Mts. (n slope of mts.) 1676 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
  JEPS9486  Galium johnstonii F. W. Peirson 1922-7-5 3159 Los Angeles n Big Pines; San Gabriel Mts., Le Montaine 2225 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
Read comments
Jan 31 2008
  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
  PASA1016  Collinsia parryi Frank W. Peirson 1919-4-19 Los Angeles Pacoima Canyon, San Gabriel Mts. 548 Comment
  PASA1039  Veronica arvensis Frank W. Peirson 1919-4-25 Los Angeles 1077 New York Avenue, Altadena Comment
  PASA1094  Lotus humistratus Frank W. Peirson 1919-5-11 Los Angeles Arraster Creek, San Gabriel Mts. 853 Comment
  PASA1272  Berberis nevinii Frank W. Peirson 1920-3-28 Los Angeles Arroyo Seco 335 Comment
  PASA1349  Lepidospartum squamatum Frank W. Peirson 1919-10-20 Los Angeles Brae-Burn Road near the Rubio stream bed. Altadena 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
  PASA1703  Solidago occidentalis Frank W. Peirson 1921-9-21 Los Angeles Los Angeles River near Tropico Comment
Read comments
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
  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
  PASA2230  Heuchera elegans Frank W. Peirson 1922-5-30 Los Angeles West spur of Mt. Lowe 1341 Comment
  PASA2247  Ribes cereum Frank W. Peirson 1919-6-4 Los Angeles Icehouse Canyon Divide, San Gabriel Mts. 2407 Comment
Read comments
Jun 24 2016
  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
  PASA2515  Ceanothus spinosus Frank W. Peirson 1921-2-26 Los Angeles Topanga Canyon, Santa Monica Mts. 457 Comment
  PASA2582  Thysanocarpus laciniatus Frank W. Peirson 1923-4-12 3446 Los Angeles Wilson's Cove, San Clemente Island 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
  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
  PASA950  Senecio lyonii Frank W. Peirson 1923-4-12 Los Angeles Wilson Cove, San Clemente Island Comment
  PASA957  Tetradymia canescens Frank W. Peirson 1923-8-30 Los Angeles Sumit north of Big Pines Camp 2255 Comment
  PASA991  Castilleja plagiotoma Frank W. Peirson 1921-7-3 Los Angeles Blue Ridge, San Gabriel Mts. 2285 Comment
  POM11156  Cystopteris fragilis F. W. Peirson 1920-9-15 s.n. Los Angeles Mt. San Antonio, north slope 2819 Comment
  POM11238  Penstemon speciosus F. W. Peirson 1922-7-5 3193 Los Angeles Big Pines, Swartout [Swarthout] Valley, San Gabriel Mountains. Comment
  POM11979  Brickellia californica F. W. Peirson 1921-10-22 2599 Los Angeles Head of Eaton Canyon, base of San Gabriel peak. 1646 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
  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
  POM193464  Rhus integrifolia F. W. Peirson 1925-2-22 240 Los Angeles Point Fermin Comment
  POM203881  Mucronea californica Mabel Peirson 1934-5-13 11145 Los Angeles Tujunga Canyon, San Gabriel Range. 457 Comment
Read comments
Dec 7 2016
  POM35148  Horkelia rydbergii F. W. Peirson 1921-6-16 2448 Los Angeles Pine Flats. 1524 Comment
Read comments
Jul 29 2016
  POM358609  Galinsoga parviflora var. parviflora F. W. Peirson 1931-4-11 9375 Los Angeles 1077 New York Avenue, Altadena. Comment
  POM46873  Brickellia nevinii F. W. Peirson 1924-12-5 5382 Los Angeles San Gabriel Peak at head of Eaton Canyon 1646 Comment
  POM47619  Plagiobothrys collinus var. fulvescens F. W. Peirson 1921-6-15 997 Los Angeles Trail from Pine Flats to Chilao 1677 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
  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
  POM9734  Equisetum telmateia var. braunii F. W. Peirson 1920-4-25 s.n. Los Angeles Arroyo Seco, Pasadena 411 Comment
Read comments
Sep 26 2014
  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
  RSA0121273  Eriastrum sapphirinum subsp. dasyanthum F. W. Peirson 1921-7-1 2829 Los Angeles Mint Canyon. 473 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
  RSA100761  Oreonana vestita F. W. Peirson 1918-6-17 137 Los Angeles summit of North Baldy 2743 Comment
  RSA296869  Mentzelia laevicaulis F. W. Peirson 1918-6-16 121 Los Angeles San Gabriel Mts. Rock Creek 1448 Comment
  RSA297993  Stachys albens F. W. Peirson 1918-8-16 179 Los Angeles San Antonio Canyon, San Gabriel Mts. 1341 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
  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
  RSA435910  Berberis nevinii F. W. Peirson 1921-3-3 s.n. Los Angeles Near stream, Arroyo Seco 335 Comment
  RSA464229  Mirabilis laevis var. villosa F. W. Peirson 1923-5-26 4153 Los Angeles Rock Creek Divide 2012 Comment
  RSA48475  Arctostaphylos glauca F. W. Peirson 1924-12-5 5383 Los Angeles Little Santa Anita Trail 915 Comment
  RSA523591  Plantago patagonica F. W. Peirson 1921-5-20 2410 Los Angeles Little Rock Creek 960 Comment
  RSA64719  Eriogonum wrightii var. subscaposum F. W. Peirson 1928-9-5 8193 Los Angeles Road from Rock Creek to Big Pines, north slope of San Gabriel Mountains 1677 Comment
  RSA64884  Oxytheca parishii var. parishii F. W. Peirson 1921-6-18 5350 Los Angeles Divide north of Mt. Islip 2043 Comment
  RSA65008  Eriogonum wrightii var. subscaposum F. W. Peirson 1920-9-12 22 Los Angeles South trail to Mt. Baldy (Mt. San Antonio), San Gabriel Mountains 2591 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
Read comments
May 16 2008
  RSA65089  Eriogonum hirtiflorum F. W. Peirson 1921-6-15 2452 Los Angeles Trail from Pine Flats to Chilao. 1677 Comment
  RSA65103  Eriogonum cinereum F. W. Peirson 1906-7-9 1761 Los Angeles Rustic Canyon. 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
  RSA65159  Eriogonum elongatum var. elongatum F. W. Peirson 1919-10-26 19 Los Angeles Along Pacific Electric tracks to Rubio Canyon, San Gabriel Mts. 549 Comment
  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
  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
  RSA65201  Mucronea californica F. W. Peirson 1934-5-13 11145 Los Angeles lower parts of Tujunga Canyon wiers end of San Gabrial Mountains. 457 Comment
  RSA65202  Mucronea californica F. W. Peirson 1951-1 1778 Los Angeles Rubio Wash, Altadena 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
  RSA65271  Chorizanthe uniaristata F. W. Peirson 1918-6-16 394 Los Angeles Rock Creek, north slope of San Gabriel Mountains 1448 Comment
  RSA65354  Atriplex serenana F. W. Peirson 1817 Los Angeles Near Kewen Lake, Pasadena Comment
  RSA65360  Atriplex canescens F. W. Peirson 1921-7-1 1811 Los Angeles Soledad Canyon, north base of San Gabriel Mountains. 442 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
  RSA65405  Calyptridium parryi F. W. Peirson 1922-7-5 3169 Los Angeles Big Pines Camp, north slope 2073 Comment
  RSA65419  Cistanthe monosperma F. W. Peirson 1905-7-14 34 Los Angeles San Antonio Canyon, San Gabriel Mts., Los Angeles Co., California 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
  RSA65491  Spergula arvensis F. W. Peirson 1869 Los Angeles Devil's Gate, Arroyo Seco Comment
  RSA65500  Arenaria macradenia var. arcuifolia F. W. Peirson 1929-7-1 8430 Los Angeles Aliso Creek at Tie Canyon. 1356 Comment
  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
  RSA65508  Minuartia douglasii F. W. Peirson 1923-5-21 4155 Los Angeles Fish Canyon 914 Comment
Read comments
Aug 1 2014
  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
  RSA65596  Loeflingia squarrosa F. W. Peirson 1920-5-3 2123 Los Angeles Little Tujunga Wash, west end of San Gabriel Mts. 335 Comment
  RSA65638  Vaccaria hispanica F. W. Peirson 1908-1 1864 Los Angeles 1077 New York Ave, Altadena. Comment
  RSA65788  Cleomella obtusifolia F. W. Peirson 1933-5-13 10661 Los Angeles 12 miles south of Muroc. 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
  RSA65980  Eriogonum roseum F. W. Peirson 1921-11-11 2719 Los Angeles Elizabeth Lake. Comment
  RSA65986  Eriogonum umbellatum var. minus F. W. Peirson 1920-9-12 21 Los Angeles Summit of 'Baldy' (Mt. San Antonio) 3049 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
  RSA66039  Eriogonum mohavense F. W. Peirson 1919-5-11 407 Los Angeles Soledad Canyon, about 1 mile below Acton, sw. Mojave Desert. 808 Comment
  RSA66060  Rorippa palustris subsp. occidentalis F. W. Peirson 1907 Los Angeles Laurel Canyon, Santa Monica Mts. 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
  RSA66083  Brassica rapa F. W. Peirson 1918-03 s.n. Los Angeles At Altadena. Comment
  RSA66191  Meconella denticulata F. W. Peirson 1925-4-23 5806 Los Angeles San Gabriel River 366 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
  RSA66283  Dendromecon rigida F. W. Peirson 1921-3-3 4320 Los Angeles Arroyo Seco, near Pasadena 351 Comment
  RSA66294  Canbya candida F. W. Peirson 1921-5-19 2412 Los Angeles Little Rock Creek: north base of San Gabriel Mountains. 1037 Comment
  RSA66295  Canbya candida F. W. Peirson 1926-4-26 6660 Los Angeles about 6 miles west of Rock Creek, 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
  RSA66505  Arabis glabra F. W. Peirson 1903-3-10 658 Los Angeles Laurel Canyon, Santa Monica Mts. 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
  RSA66708  Caulanthus amplexicaulis var. amplexicaulis F. W. Peirson 1926-4-27 6672 Los Angeles Rock Creek, north slope of San Gabriel Range 1372 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
  RSA66841  Caulanthus heterophyllus var. heterophyllus F. W. Peirson 1918-6-6 63 Los Angeles East of Rubio Canyon Comment
  RSA67136  Galium porrigens var. porrigens F. W. Peirson 1918-5-26 2652 Los Angeles Summit of Mt. Wilson, San Gabriel Mts 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
  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
  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
  RSA68635  Calochortus plummerae Frank W. Peirson 1922-7-22 3213 Los Angeles San Antonio Canyon, Los Angeles-San Bernardino County line 1524 Comment
  RSA68637  Calochortus plummerae Frank W. Peirson 1921-6-20 2666 Los Angeles North Fork of San Gabriel River 762 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
  RSA68663  Zigadenus fremontii Frank W. Peirson 1921-4-21 2402 Los Angeles Trail below Sycamore Flat, on way to San Dimas, San Gabriel Mountains. 793 Comment
  RSA68664  Zigadenus fremontii Frank W. Peirson 1918-5-5 1687 Los Angeles Brents on the Malibu, Santa Monica Mountains. Comment
  RSA68668  Calochortus albus Frank W. Peirson 1923-5-21 8605 Los Angeles Fish Canyon, San Gabriel Mountains. 610 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
  RSA68679  Zigadenus brevibracteatus Frank W. Peirson 1932-4-17 8957 Los Angeles Below Lovejoy Dam, Lovejoy Buttes, southwestern Mojave Desert. 762 Comment
  RSA68709  Lilium parryi Frank W. Peirson 1921-7-17 2515 Los Angeles Prairie Fork of San Gabriel River, San Gabriel Mountains. 2134 Comment
  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
  RSA68974  Plantago erecta F. W. Peirson 1921-3-6 2747 Los Angeles San Gabriel Wash. 213 Comment
  RSA68978  Plantago hirtella var. galeottiana F. W. Peirson 1179 Los Angeles Near Kewen Lake, Pasadena Comment
  RSA69036  Dodecatheon redolens F. W. Peirson 1921-7-17 2516 Los Angeles Prairie Fork of San Gabriel River, San Gabriel Mountains. 2134 Comment
  RSA69308  Pyrola picta F. W. Peirson 1921-7-17 2512 Los Angeles Prairie Fork of San Gabriel River, San Gabriel Mountains. 2134 Comment
  RSA69413  Delphinium parryi subsp. parryi F. W. Peirson 1918-6-12 48 Los Angeles Burnt area in hills east of Rubio Canyon, San Gabriel Mountains. Comment
  RSA69441  Frasera neglecta F. W. Peirson 1921-6-15 2670 Los Angeles Pine flats stream, north slope 1494 Comment
Read comments
Feb 25 2015
  RSA69459  Mirabilis laevis var. villosa F. W. Peirson 1930-7-30 9043 Los Angeles Big Rock Creek. 1372 Comment
  RSA69497  Mirabilis laevis var. villosa F. W. Peirson 1923-5-26 4153 Los Angeles Rock Creek, north base of San Gabriel Mts. 1296 Comment
  RSA69499  Mirabilis laevis var. villosa F. W. Peirson 1919-5-10 1853 Los Angeles Arraster [Arrastre] Creek, San Gabriel Mountains. 838 Comment
  RSA69532  Maianthemum stellatum Frank W. Peirson 1921-7-17 2349 Los Angeles Prairie Fork of San Gabriel River, San Gabriel Mountains. 2134 Comment
  RSA69566  Mentzelia ravenii F. W. Peirson 1919-5-10 395 Los Angeles Arraster [Arrastre] Creek. North base of San Gabriel Mountains. 915 Comment
Read comments
Feb 20 2013
  RSA69570  Arbutus menziesii F. W. Peirson 1919-4-5 140 Los Angeles Old Trail to Mt. Wilson, San Gabriel Mts. 762 Comment
  RSA69628  Juncus balticus F. W. Peirson 1922-6-4 1642 Los Angeles Soledad Canyon, San Gabriel Mountains. 457 Comment
  RSA69671  Juncus bufonius var. bufonius F. W. Peirson 1921-5-20 5354 Los Angeles Little Rock Creek 960 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
  RSA69881  Forestiera pubescens F. W. Peirson 1919-6-13 483 Los Angeles Large colony on south side of canyon of Rock Creek. 1296 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
  RSA69944  Nitrophila occidentalis F. W. Peirson 1924-10-19 5229 Los Angeles Clearwater. 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
  RSA69980  Abronia pogonantha F. W. Peirson 1921-5-19 2414 Los Angeles Little Rock Creek: north base of San Gabriel Mountains. 1037 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
  RSA70018  Suaeda taxifolia F. W. Peirson 1904-8-22 1830 Los Angeles Playa del Rey, coast of Los Angeles Co. 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
  RSA70171  Allium monticola F. W. Peirson 1918-6-17 267 Los Angeles Rock Creek Divide Comment
  RSA70225  Allium haematochiton F. W. Peirson 1921-4-21 2841 Los Angeles Foot of San Dimas Canyon. 457 Comment
  RSA70244  Allium peninsulare var. peninsulare F. W. Peirson 1919-7-1 509 Los Angeles Fish Canyon, San Gabriel Mountains 610 Comment
  RSA70285  Juncus mexicanus F. W. Peirson 1920-9-17 2287 Los Angeles San Antonio Canyon, San Gabriel Mountains. 1341 Comment
  RSA70294  Juncus duranii F. W. Peirson 1921-7-17 2844 Los Angeles Prairie Fork of San Gabriel River, San Gabriel Mountains. 2134 Comment
  RSA70338  Asclepias californica F. W. Peirson 1923-5-26 3541 Los Angeles Rock Creek Divide 2011 Comment
  RSA70353  Funastrum cynanchoides var. hartwegii F. W. Peirson 889 Los Angeles near bridge southeast of Monrovia. Comment
  RSA70358  Cycladenia humilis var. venusta F. W. Peirson 1905-7-14 4470 Los Angeles Baldy and North Baldy Comment
Read comments
Nov 30 2015
  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
  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
  RSA70453  Allium burlewii F. W. Peirson 1921-6-16 2842 Los Angeles north slope of Mt. Waterman 2133 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
  RSA70466  Allium lacunosum var. davisiae F. W. Peirson 1921-6-15 2665 Los Angeles Trail from Pine Flats to Chilao 1677 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
  RSA70496  Erodium macrophyllum F. W. Peirson 1918-5-5 2024 Los Angeles along road to [Brents] on the Malibu, Santa Monica Mts. Comment
Read comments
Jun 21 2018
  RSA70526  Calochortus invenustus Frank W. Peirson 1922-7-5 3188 Los Angeles Mountain north of Big Pines 2286 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
  RSA70616  Chamaesyce melanadenia F. W. Peirson 1903-2-21 4441 Los Angeles Coldwater Canyon, Santa Monica Range. Comment
  RSA70824  Arctostaphylos patula F. W. Peirson 1918-6-17 143 Los Angeles summit of North Baldy 2743 Comment
  RSA70850  Arctostaphylos glandulosa subsp. mollis F. W. Peirson 1920-5-9 142 Los Angeles east trail to Mt. Lowe 1341 Comment
  RSA70872  Arctostaphylos glauca F. W. Peirson 1919-1-29 315 Los Angeles Inspiration Point, Mt. Lowe 1372 Comment
  RSA71096  Calystegia peirsonii F. W. Peirson 1927-5-21 7301 Los Angeles Rock Creek, north base of San Gabriel Mountains. 1524 Comment
  RSA71099  Calystegia macrostegia subsp. intermedia F. W. Peirson 1920-4-22 151 Los Angeles foothills east of Rubio Canyon 533 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
  RSA71113  Convolvulus simulans F. W. Peirson 1908-4-18 4253 Los Angeles Point Fermin Comment
  RSA71126  Convolvulus arvensis F. W. Peirson 890 Los Angeles New York Ave, Altadena. Comment
  RSA71794  Saltugilia splendens subsp. grantii F. W. Peirson 1928-6-2 7933 Los Angeles South Fork of Rock Creek 1982 Comment
  RSA71820  Gilia capitata subsp. abrotanifolia F. W. Peirson 1921-4-21 2831 Los Angeles Trail below Sycamore Flat, on way to San Dimas, San Gabriel Mountains. 793 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
Read comments
Jun 18 2018
  RSA71859  Allophyllum divaricatum F. W. Peirson 1923-10-26 293 Los Angeles Big Dalton Canyon, San Gabriel Mountains. 762 Comment
  RSA71886  Gilia capitata subsp. abrotanifolia F. W. Peirson 1919-2-12 s.n. Los Angeles Field near foot of Lukens Trail, San Gabriel Mountains. 610 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
  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
  RSA72100  Epilobium canum subsp. canum F. W. Peirson 1919-11-16 4518 Los Angeles Gully into Eaton Canyon near end of New York Ave., Altadena. 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
  RSA72104  Epilobium canum subsp. canum F. W. Peirson 1918-10-21 280 Los Angeles West Fork of San Gabriel Mountains. 1067 Comment
  RSA72140  Gayophytum heterozygum F. W. Peirson 1920-6-10 130 Los Angeles San Gabriel Mts., summit of Mt. Wilson 1723 Comment
  RSA72142  Gayophytum oligospermum F. W. Peirson 1922-7-5 4455 Los Angeles Big Pines. Northeast portion of San Gabriel Mountains. 2104 Comment
  RSA72170  Epilobium ciliatum subsp. ciliatum F. W. Peirson 765 Los Angeles Long Beach. Comment
  RSA72175  Epilobium ciliatum subsp. ciliatum F. W. Peirson 1951-08 s.n. Los Angeles Kewen Lake, Pasadena Comment
  RSA72177  Epilobium ciliatum subsp. ciliatum F. W. Peirson 1923-10-7 4165 Los Angeles Santa Clara River crossing north of Saugus. 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
  RSA72221  Gaura sinuata F. W. Peirson 1919-8-10 2088 Los Angeles Along road from San Gabriel to El Monte. Comment
  RSA72258  Camissonia cheiranthifolia subsp. suffruticosa F. W. Peirson 1921-2-26 2579 Los Angeles Beach 1 mile east of Topango [Topanga]. Comment
  RSA72263  Camissonia cheiranthifolia subsp. suffruticosa F. W. Peirson 1951-2-7 789 Los Angeles Long Beach Comment
Read comments
Jan 30 2012
  RSA72283  Gilia nevinii F. W. Peirson 1923-4-9 3433 Los Angeles San Clemente Island: Wilson's Cove. Comment
  RSA72290  Gilia angelensis F. W. Peirson 1918-6-16 469 Los Angeles Mint Canyon, Sierra Pelona Valley, northwest corner of San Gabriel Mts. 762 Comment
  RSA72311  Gilia sinuata F. W. Peirson 1919-6-14 9324 Los Angeles Rock Creek, north slope of San Gabriel Mts. 1524 Comment
  RSA72316  Gilia brecciarum subsp. brecciarum F. W. Peirson 1921-5-20 4704 Los Angeles Little Rock Creek, N slope of San Gabriel Mts 1037 Comment
  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
  RSA72645  Wyethia ovata F. W. Peirson 1921-6-14 1326 Los Angeles San Gabriel Mountains. Pine Flats, headwaters of Tujunga Creek. 1676 Comment
  RSA72997  Leptosiphon breviculus F. W. Peirson 1923-5-26 3543 Los Angeles Rock Creek. 1296 Comment
  RSA73009  Linanthus concinnus F. W. Peirson 1928-6-2 7931 Los Angeles S fork of Rock Creek: trail toward the summit. 1982 Comment
  RSA73010  Linanthus concinnus F. W. Peirson 1921-6-18 2462 Los Angeles divide north of Mt. Islip 2042 Comment
  RSA73012  Linanthus concinnus F. W. Peirson 365 Los Angeles Summit of Mt. Lowe. Comment
  RSA73031  Leptosiphon breviculus F. W. Peirson 1921-6-18 4710 Los Angeles divide north of Mt. Islip 2042 Comment
  RSA73037  Leptosiphon breviculus F. W. Peirson 1926-4-27 6665 Los Angeles San Gabriel Mountains. North side of San Gabriel Mountains, Rock Creek. 1296 Comment
  RSA73058  Leptosiphon ciliatus F. W. Peirson 1920-6-10 2790 Los Angeles San Gabriel Mts., summit of Mt. Wilson 1738 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
  RSA73283  Linanthus pungens F. W. Peirson 1921-6-16 2828 Los Angeles Ridge Westward from summit of Mt. Waterman, San Gabriel Mts. 2256 Comment
  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
  RSA73303  Clarkia bottae F. W. Peirson 1917-5-1 2087 Los Angeles Topanga Canyon, Santa Monica Mountains. Comment
  RSA73317  Clarkia cylindrica subsp. cylindrica F. W. Peirson 1922-6-3 771 Los Angeles North slope of Liebre Mts. 1220 Comment
  RSA73318  Clarkia cylindrica subsp. cylindrica F. W. Peirson 1930-5-12 4113 Los Angeles North slope along road above Bouquet Canyon. 1067 Comment
  RSA73320  Clarkia cylindrica subsp. cylindrica F. W. Peirson 1921-5-18 2797 Los Angeles summit of Newhall Grade, near Newhall. 427 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
  RSA73345  Clarkia xantiana F. W. Peirson 1928-6-2 7943 Los Angeles Trail up South Fork of Rock Creek. 1677 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
  RSA73350  Clarkia rhomboidea F. W. Peirson 1919-6-5 5307 -a 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
  RSA74162  Phacelia tanacetifolia F. W. Peirson 1920-3-28 2101 Los Angeles North slope of low hills at foot of Tujunga Canyon, w. end of San Gabriel Mountains. 457 Comment
  RSA74500  Phacelia minor F. W. Peirson 1918-1 162 Los Angeles burned area east of Rubio Canyon 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
  RSA74813  Turricula parryi F. W. Peirson 1921-6-20 2460 Los Angeles North Fork of San Gabriel River. 732 Comment
  RSA74919  Phacelia egena F. W. Peirson 1928-6-2 7946 Los Angeles along lower part of trail up S Fork of Rock Creek, San Gabriel Mts 1524 Comment
  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
  RSA74922  Phacelia imbricata subsp. imbricata F. W. Peirson 1905-5-28 974 Los Angeles Rubio Wash above New York Ave., Pasadena 366 Comment
  RSA74923  Phacelia imbricata subsp. patula F. W. Peirson 1921-6-16 2451 Los Angeles Summit of Mt. Waterman Ridge 2287 Comment
  RSA74924  Phacelia egena F. W. Peirson 1929-6-30 8426 Los Angeles Just below the old mill on the Tie Canyon stream, Aliso Creek, San Gabriel Mountians. 1341 Comment
  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
  RSA74929  Phacelia distans F. W. Peirson 1921-6-15 2823 Los Angeles Trail from Pine Flats to Chilao. 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
  RSA74959  Phacelia douglasii F. W. Peirson 1922-6-3 3085 Los Angeles East of Oak Grove Creek Divide, Liebre Mts. 1174 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
  RSA75352  Phacelia fremontii F. W. Peirson 1922-6-3 4478 Los Angeles East of Oak Grove Creek Divide, Liebre Mts. 1174 Comment
  RSA75382  Camissonia strigulosa F. W. Peirson 1919-5-10 405 Los Angeles Arraster [Arrastre] Creek. North base of San Gabriel Mountains. 915 Comment
  RSA75437  Camissonia hirtella F. W. Peirson 1918-5-4 2309 Los Angeles Summit of Santa Monica Range, above Brents on the Malibu 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
  RSA75512  Phacelia affinis F. W. Peirson 1919-5-10 410 Los Angeles Arraster Creek, San Gabriel Mts. Comment
  RSA75683  Camissonia boothii subsp. decorticans F. W. Peirson 1919-6-14 479 Los Angeles Rock Creek [Big?] 1524 Comment
  RSA75690  Camissonia campestris subsp. campestris F. W. Peirson 1917-5-13 4515 Los Angeles Near Little Rock, Mojave Desert. Comment
  RSA75884  Nemophila menziesii var. integrifolia F. W. Peirson 1925-3-18 5467 Los Angeles South slope of Newhall Grade between Saugus and San Fernando Valley 381 Comment
  RSA75932  Phacelia longipes F. W. Peirson 1919-4-19 381 Los Angeles Pacoima Canyon 488 Comment
  RSA75933  Phacelia longipes F. W. Peirson 1927-5-21 3618 Los Angeles near falls in Fish canyon 610 Comment
  RSA75934  Phacelia longipes F. W. Peirson 1928-6-2 7941 Los Angeles near foot of trail at 5000ft to near summit of ridge, trail up S Fork of Rock Creek, San Gabriel Range 2073 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
  RSA76237  Leptosiphon liniflorus F. W. Peirson 1951-6-23 942 Los Angeles Near Kewen Lake, Pasadena Comment
Read comments
Mar 27 2009
  RSA76939  Rhus trilobata F. W. Peirson 1919-5-18 342 Los Angeles Hills east of Monrovia Canyon 457 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
  RSA76952  Ricinus communis F. W. Peirson 2047 Los Angeles New York Ave, Altadena. 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
  RSA77038  Malacothamnus marrubioides F. W. Peirson 1919-6-15 502 Los Angeles Rock Creek 1250 Comment
  RSA77040  Malacothamnus fremontii F. W. Peirson 1929-6-30 8428 Los Angeles Aliso Creek at Tie Canyon. 1357 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
  RSA77144  Ceanothus crassifolius F. W. Peirson 1921-5-12 4444 Los Angeles Santa Anita Canyon, just below Forks in trail; San Gabriel Mountains. Comment
Read comments
Sep 30 2014
  RSA77153  Ceanothus cordulatus F. W. Peirson 1921-6-17 2576 Los Angeles At west base of Mt. Williamson, on divide between Bear and Little Rock Creeks. 1982 Comment
  RSA77161  Ceanothus leucodermis F. W. Peirson 1921-5-20 8673 Los Angeles Between the forks, Little Rock Creek, San Gabriel Mts. 1067 Comment
  RSA77163  Ceanothus leucodermis F. W. Peirson 1918-5-19 112 Los Angeles Dawn Station along the trolley to Mt. Lowe, San Gabriel Mts. 1037 Comment
  RSA77170  Rhus integrifolia F. W. Peirson 1919-2-9 224 Los Angeles Fish Canyon, San Gabriel Mts. 305 Comment
Read comments
Dec 10 2014
  RSA77171  Rhus integrifolia F. W. Peirson 1919-1-25 313 Los Angeles Arroyo Seco, near Pasadena 381 Comment
  RSA77172  Rhus integrifolia F. W. Peirson 1925-2-22 240 Los Angeles Point Fermin Comment
  RSA77173  Rhus integrifolia F. W. Peirson 1926-4-26 6646 Los Angeles Pocoima Wash, San Fernando Valley. Comment
  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
  RSA77253  Nama californica F. W. Peirson 1919-5-10 396 Los Angeles Arraster [Arrastre] Creek. North base of San Gabriel Mountains. 915 Comment
  RSA77255  Emmenanthe penduliflora var. penduliflora F. W. Peirson 1925-4-23 5799 Los Angeles Forks of San Gabriel River. 534 Comment
  RSA77353  Ceanothus greggii var. vestitus F. W. Peirson 1918-6-16 4448 Los Angeles Rock Creek, north slope of San Gabriel Mountains 1448 Comment
  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
  RSA77765  Viola douglasii F. W. Peirson 1921-6-15 2447 Los Angeles Trail from Pine Flats to Chilao. 1677 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
  RSA79456  Scrophularia villosa F. W. Peirson 1922-4-10 3438 Los Angeles San Clemente Island, about 10 miles SE of Wilson's Cove Comment
Read comments
May 16 2008
  RSA79594  Cryptantha barbigera F. W. Peirson 1928-6-2 7944 Los Angeles Trail up South Fork of Rock Creek. 1677 Comment
  RSA79598  Cryptantha circumscissa F. W. Peirson 1919-5-10 1001 Los Angeles Arraster [Arrastre] Creek, San Gabriel Mountains. 838 Comment
  RSA79630  Mimulus parishii F. W. Peirson 1918-6-16 199 Los Angeles Rock Creek, north slope of San Gabriel Mountains 1448 Comment
  RSA79749  Keckiella ternata subsp. ternata F. W. Peirson 1918-8-6 263 Los Angeles Martins Camp, Mt. Wilson, San Gabriel Mountains. 1677 Comment
  RSA79779  Penstemon centranthifolius F. W. Peirson 1905-1 200 Los Angeles Mt. Lowe, San Gabriel Mountains. 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
  RSA79799  Collinsia childii F. W. Peirson 1920-5-28 2156 Los Angeles Bear Canyon, trail to San Antonio Peak, San Gabriel Mountains 1372 Comment
  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
  RSA79854  Penstemon grinnellii subsp. grinnellii F. W. Peirson 1905-1 201 Los Angeles Mt. Lowe, San Gabriel Mountains. Comment
  RSA79881  Datura wrightii F. W. Peirson 1920-5-3 1083 Los Angeles Little Tujunga Wash, west end of San Gabriel Mts. 335 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
  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
  RSA80175  Linaria canadensis F. W. Peirson 187 Los Angeles Burned area east of Rubio Canyon 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
  RSA80243  Orthocarpus purpurascens var. pallidus F. W. Peirson 1951-3-7 334 Los Angeles Eagle Rock Valley Comment
  RSA80335  Lycium cooperi F. W. Peirson 1921-5-19 1086 Los Angeles Little Rock Creek 945 Comment
  RSA80357  Perideridia pringlei F. W. Peirson 1930-5-12 8793 Los Angeles Near foot of grade north of Vincent. Comment
  RSA80363  Foeniculum vulgare F. W. Peirson 1920-6-22 2164 Los Angeles Fruiting branch from New York Drive, Altadena Comment
  RSA80373  Solanum umbelliferum F. W. Peirson 1921-2-26 4486 Los Angeles Beach 1 mile east of Topango [Topanga]. 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
  RSA80391  Solanum umbelliferum F. W. Peirson 1918-6-16 186 Los Angeles Rock Creek, north slope of San Gabriel Mountains 1448 Comment
  RSA80396  Solanum umbelliferum F. W. Peirson 1921-2-26 2792 Los Angeles Topango Canyon, Santa Monica Mts. 457 Comment
  RSA80433  Antirrhinum multiflorum F. W. Peirson 1951-1 190 Los Angeles Summit of Mt. Lowe Comment
  RSA80434  Antirrhinum multiflorum F. W. Peirson 1924-5-26 4643 Los Angeles Trail to Switzers Camp, San Gabriel Mts 930 Comment
  RSA80486  Mimulus palmeri F. W. Peirson 1907-7-9 1124 Los Angeles Pine Flats Comment
Read comments
Dec 10 2014
  RSA80496  Mimulus fremontii var. fremontii F. W. Peirson 1905-5-28 1122 Los Angeles Rubio Canyon wash above New York Ave., Altadena. 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
  RSA80745  Cryptantha oxygona F. W. Peirson 1921-6-15 2463 Los Angeles Trail from Pine Flats to Chilao 1677 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
  RSA80771  Nicotiana quadrivalvis F. W. Peirson 1921-3-6 2729 Los Angeles San Gabriel Wash. 213 Comment
  RSA81452  Castilleja plagiotoma F. W. Peirson 1921-7-3 2727 Los Angeles Blue Ridge, south of Swartout Valley 2287 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
  RSA81491  Castilleja linariifolia F. W. Peirson 1919-6-14 490 Los Angeles Rock Creek, north slope of San Gabriel Mts. 1524 Comment
  RSA82062  Cordylanthus maritimus subsp. maritimus F. W. Peirson 1924-8-29 5098 Los Angeles 2 miles south of Artesia 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
  RSA82209  Phyla lanceolata F. W. Peirson 1951-9-16 1040 Los Angeles Kewen Lake, Pasadena. Comment
  RSA82224  Verbena scabra F. W. Peirson 1951-08 1039 Los Angeles Kewen Lake, Pasadena 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
  RSA82554  Stachys albens F. W. Peirson 1927-8-14 7840 Los Angeles Arroyo Seco south base of San Gabriel Mts. 549 Comment
  RSA82575  Stachys albens F. W. Peirson 1924-8-23 5055 Los Angeles West Fork of San Gabriel River. 412 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
  RSA83347  Dudleya pulverulenta F. W. Peirson 1906-7-10 1932 Los Angeles Rustic Canyon, Santa Monica Mtns. Comment
  RSA83351  Lepechinia fragrans F. W. Peirson 177 Los Angeles upper part of Mt. Wilson trail (now toll road) Comment
  RSA83360  Dudleya cymosa subsp. pumila F. W. Peirson 1919-5-10 453 Los Angeles Mt.Gleason 1372 Comment
  RSA83366  Dudleya cymosa subsp. pumila F. W. Peirson 1919-5-14 452 Los Angeles Eaton Canyon. 685 Comment
Read comments
Dec 9 2015
  RSA83372  Dudleya cymosa subsp. pumila F. W. Peirson 1919-7-7 262 Los Angeles open space along south edge of Ontario Peak 2590 Comment
  RSA83379  Monardella exilis F. W. Peirson 1918-6-18 1067 Los Angeles Between Rock Creek and Cajon Pass, east of Llano. 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
  RSA83433  Pycnanthemum californicum F. W. Peirson 1921-7-15 2731 Los Angeles Main branch of San Gabriel River. 915 Comment
  RSA83434  Satureja douglasii F. W. Peirson 1906-7-10 1063 Los Angeles Rustic Canyon, Santa Monica Mtns. Comment
  RSA84227  Monardella linoides F. W. Peirson 1922-7-5 3160 Los Angeles Elevation north of Big Pines called La Montaine 2226 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
Read comments
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
Read comments
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
  RSA84384  Lithophragma heterophyllum F. W. Peirson 1921-4-3 2395 Los Angeles Pacoima Canyon, W end of San Gabriel Mts. 549 Comment
Read comments
Oct 6 2009
  RSA84410  Clematis lasiantha F. W. Peirson 51 Los Angeles Rubio Canyon, south base of San Gabriel Mountains. Comment
  RSA84458  Clematis ligusticifolia F. W. Peirson 1925-9-4 8182 Los Angeles At point slightly below foot of steep grade, Bouquet Canyon, northwest part of San Gabriel Mts. Comment
  RSA84465  Clematis lasiantha F. W. Peirson 1926-3-20 6516 Los Angeles Arroyo Seco, near Pasadena 915 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
  RSA84502  Ribes malvaceum var. viridifolium F. W. Peirson 1919-5-18 71 Los Angeles Ridge between Monrovia and Fish Canyons 1067 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
  RSA84516  Ribes aureum var. gracillimum F. W. Peirson 1921-3-6 687 Los Angeles Foothill Blvd. 1 mile east of Monrovia Comment
  RSA84842  Ribes nevadense F. W. Peirson 1919-5-10 688 Los Angeles Trail from Arraster [Arrastre] Creek to Mt. Gleason, San Gabriel Mts. 1677 Comment
Read comments
Aug 21 2014
  RSA84848  Ribes cereum var. cereum F. W. Peirson 1922-7-6 4433 Los Angeles Big Pines 2104 Comment
  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
  RSA84970  Ribes speciosum F. W. Peirson 1927-3-19 7112 Los Angeles Seminole Hot Springs. Santa Monica Mts. 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
  RSA85061  Adenostoma fasciculatum var. fasciculatum F. W. Peirson 1921-5-12 78 Los Angeles Toll Road to Mt. Wilson 762 Comment
  RSA85202  Horkelia cuneata subsp. puberula F. W. Peirson 1919-4-5 362 Los Angeles Allen Ranch near Eaton Canyon, south base of the San Gabriel Mountains Comment
Read comments
Sep 10 2014
  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
Read comments
Jul 29 2016
  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
  RSA85321  Ribes californicum var. hesperium F. W. Peirson 1919-1-19 4435 Los Angeles Las Flores Canyon, San Gabriel Mts. Comment
  RSA85522  Ribes amarum F. W. Peirson 1928-2-19 7686 Los Angeles Arroyo Seco 610 Comment
  RSA85525  Umbellularia californica F. W. Peirson 1919-1-25 312 Los Angeles Arroyo Seco, near Pasadena 381 Comment
  RSA85558  Juniperus californica F. W. Peirson 1919-5-11 427 Los Angeles Arraster Creek, north slope of San Gabriel Mts. 853 Comment
  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
  RSA86531  Pinus flexilis F. W. Peirson 3997 Los Angeles Blue Ridge 2591 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
  RSA86677  Cercocarpus betuloides F. W. Peirson 1927-3-19 7115 Los Angeles Seminole Hot Springs. Santa Monica Mts. 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
  RSA86711  Lolium temulentum F. W. Peirson 1918-4-28 1607 Los Angeles Road east and south of El Monte. Comment
  RSA86715  Andropogon glomeratus var. scabriglumis F. W. Peirson 1926-3-20 6517 Los Angeles Arroyo Seco, near Altadena. Alt. 2500 ft. 762 Comment
  RSA86724  Aristida ternipes var. hamulosa F. W. Peirson 1919-11-17 1590 Los Angeles in dense tufts, trail to Mt. Lowe, west of Eaton Canyon 609 Comment
  RSA86728  Avena barbata F. W. Peirson 1918-04 1600 Los Angeles Altadena. 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
  RSA86818A  Amelanchier utahensis F. W. Peirson 1919-6-14 471 -A Los Angeles Rock Creek Divide, north side of San Gabriel Mountains. 2012 Comment
  RSA86818B  Amelanchier utahensis F. W. Peirson 1923-5-26 471 -B Los Angeles Rock Creek Divide 2012 Comment
Read comments
Sep 23 2014
  RSA86823  Heteromeles arbutifolia F. W. Peirson 1907-7-1 694 Los Angeles Catalina Island. Comment
  RSA86824  Heteromeles arbutifolia F. W. Peirson 77 Los Angeles Sink at Inglewood. Comment
  RSA86833  Rubus ursinus F. W. Peirson 1921-5-3 8653 Los Angeles North Fork of Millards Canyon 1067 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
  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
  RSA86867  Prunus lyonii F. W. Peirson 1907-7-1 699 Los Angeles Catalina Island. Comment
  RSA86954  Lupinus ruber F. W. Peirson 1921-5-18 2428 Los Angeles Palmdale, Antelope Valley Comment
  RSA86958  Lupinus odoratus var. odoratus F. W. Peirson 1917-5-13 706 Los Angeles Palmdale, SW Mojave Desert Comment
  RSA87060  Hordeum murinum subsp. glaucum F. W. Peirson 1918-04 1605 Los Angeles New York Drive, Altadena 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
  RSA87132  Lamarckia aurea F. W. Peirson 1918-04 1554 Los Angeles New York Drive, Altadena Comment
  RSA87150  Quercus tomentella F. W. Peirson 1923-4-9 3456 Los Angeles San Clemente Island: Middle Ranch Comment
Read comments
Jun 5 2014
  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
Read comments
Dec 19 2014
  RSA87176  Quercus chrysolepis F. W. Peirson 1920-5-28 16 Los Angeles San Antonio Canyon, San Gabriel Mts 1433 Comment
  RSA87192  Lupinus excubitus var. johnstonii F. W. Peirson 1929-7-1 8442 Los Angeles Mt. Pacifico 1982 Comment
  RSA87208  Lupinus elatus F. W. Peirson 1929-7-1 8439 Los Angeles Mt. Pacifico 2058 Comment
  RSA87210  Lupinus hyacinthinus F. W. Peirson 1918-6-10 89 Los Angeles Summit of San Gabriel Peak 1860 Comment
  RSA87219  Lupinus peirsonii F. W. Peirson 1930-5-30 8904 Los Angeles North slope of Rock Creek 1372 Comment
  RSA87220  Lupinus peirsonii F. W. Peirson 1926-4-27 6671 Los Angeles North side of Rock Creek Canyon, north slope of San Gabriel Mountains 1372 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
  RSA87337  Melica imperfecta F. W. Peirson 1922-5-30 5365 Los Angeles Dawn Station, Mt. Lowe, San Gabriel Mountains. Comment
  RSA87343  Lupinus concinnus F. W. Peirson 1921-5-19 7720 Los Angeles Little Rock Creek 976 Comment
  RSA87347  Galium andrewsii subsp. intermedium F. W. Peirson 1919-5-10 399 Los Angeles Arraster [Arrastre] Creek. 976 Comment
  RSA87423  Lupinus polyphyllus subsp. bernardinus F. W. Peirson 1923-5-21 3520 Los Angeles Fish Canyon, San Bernardino Mountains 686 Comment
  RSA87457  Melica imperfecta F. W. Peirson 1918-04 1569 Los Angeles Altadena. Comment
  RSA87460  Melica imperfecta F. W. Peirson 1918-4-28 1541 Los Angeles Turnbull Canyon near Whittier, Puente Hills. 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
  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
  RSA92422  Helianthus gracilentus F. W. Peirson 1919-7-3 512 Los Angeles San Gabriel Mts: on Lukens Peak trail. 1220 Comment
  RSA94545  Senecio breweri F. W. Peirson 1918-5-5 1433 Los Angeles along road to [Brents] on the Malibu, Santa Monica Mts. Comment
  RSA94704  Packera ionophylla F. W. Peirson 1921-7-17 2511 Los Angeles Prairie Fork of San Gabriel River. 2134 Comment
  RSA94705  Packera ionophylla F. W. Peirson 1922-7-6 3195 Los Angeles Big Pines region west of Swartout Valley Comment
  RSA94709  Senecio astephanus F. W. Peirson 1919-7-3 8568 Los Angeles Lukens Peak Trail 762 Comment
  RSA94838  Senecio triangularis F. W. Peirson 1921-7-17 2509 Los Angeles Prairie Fork of San Gabriel River, San Gabriel Mountains. 2134 Comment
  RSA95363  Ceanothus megacarpus F. W. Peirson 1918-5-5 731 Los Angeles along road to [Brents] on the Malibu, Santa Monica Mts. Comment
Read comments
Apr 20 2019
  SBBG28525  Frangula californica subsp. cuspidata F. W. Peirson 1919-6-15 727 Los Angeles Rock Crk, N slope 1295 Comment
  SBBG29808  Phacelia cryptantha F. W. Peirson 1928-6-2 7942 Los Angeles trail up S Fk of Rock Crk 1676 Comment
  SD58283  Nemophila menziesii var. integrifolia Frank W. Peirson 1918-5-19 166 Los Angeles San Gabriel Mountains; Millards Canyon. 609 Comment
  SD70387  Dudleya densiflora Frank W. Peirson 1919-7-1 517 Los Angeles Fish Canyon 274 Comment
  SD70399  Lathyrus vestitus var. vestitus Frank W. Peirson 1920-5-16 2137 Los Angeles San Gabriel Mountains, Tujunga 472 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
Read comments
Jul 10 2010
  SD87655  Ericameria nauseosa var. hololeuca Frank W. Peirson 1925-6-23 6026 Los Angeles Upper part of Mint Canyon. Comment
  SD87721  Venegasia carpesioides F. W. Peirson 1924-5-24 4619 Los Angeles Topango Canyon, Santa Monica Mountains 89 Comment
  SD87785  Silene lemmonii F. W. Peirson 1924-5-27 4624 Los Angeles North slope Strawberry Peak, San Gabriel Mountains. 1520 Comment
  SD87814  Camissoniopsis hirtella F. W. Peirson 1919-5-10 4698 Los Angeles San Gabriel Mountains. 914 Comment
  SD87872  Collinsia callosa F. W. Peirson 1921-6-15 2443 Los Angeles Chilao, San Gabriel Mtns. 1646 Comment
  SD87878  Castilleja plagiotoma Frank W. Peirson 1921-7-3 2727 Los Angeles Blue Ridge, San Gabriel Mts., summit of ridge 2286 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
  UC1199875  Dodecatheon redolens Frank W. Peirson 1921-7-17 2516 Los Angeles Prairie Fork San Gabriel River San Gabriel Mountains, Prairie Fork San Gabriel River 2133 Comment
  UC483075  Salix laevigata Frank W. Peirson 1923-5-27 9609 Los Angeles Pallett Creek San Gabriel Mts., Pallett Creek 1097 Comment
  UC483089  Salix lasiolepis Frank W. Peirson 1932-3-3 9767 Los Angeles Arroyo Seco Canyon; banks of stream 396 Comment
  UC483092  Salix exigua var. hindsiana Frank W. Peirson 1932-4-17 9859 Los Angeles about Lovejoy Dam; Mohave Desert, Lovejoy Buttes 762 Comment
  UC501438  Gilia minor Frank W. Peirson 1932-4-17 9861 Los Angeles 2 mi ne Lovejoy Buttes (Mohave Desert); , ne of Lovejoy Buttes 762 Comment
  UC501447  Galinsoga parviflora var. parviflora Frank W. Peirson 1931-4-11 9375 Los Angeles 1077 New York Avenue Altadena Comment
  UC501463  Lessingia glandulifera var. peirsonii Frank W. Peirson 1923-6-9 3550 Los Angeles King Canyon Liebre Mts., King Canyon 1173 Comment
  UC501505  Rosa woodsii subsp. gratissima Frank W. Peirson 1918-6-17 470 Los Angeles Rock Creek San Gabriel Range 1676 Comment
  UC511785  Phacelia bicolor var. bicolor Frank W. Peirson 1933-5-13 10664 Los Angeles 10 mi s Muroc Comment
  UC511787  Nicolletia occidentalis Frank W. Peirson 1933-5-13 10662 Los Angeles 12 mi s Muroc Comment
  UC511788  Cleomella obtusifolia Frank W. Peirson 1933-5-13 10661 Los Angeles 12 mi s Muroc Comment
  UC511863  Descurainia sophia Frank W. Peirson 1933-5-13 10665 Los Angeles 12 mi ne Lancaster 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
  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
  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
  UC672396  Phacelia grandiflora Frank W. Peirson 1925-4-23 5809 Los Angeles small side canyon San Gabriel Canyon 304 Comment
  UC908264  Linanthus concinnus Frank W. Peirson 1928-6-2 7931 Los Angeles South Fork Rock Creek San Gabriel Mts. 1981 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
  UC908547  Gilia ochroleuca subsp. bizonata Frank W. Peirson 1919-5-10 268 Los Angeles Arraster Creek San Gabriel Mts., Arraster Creek 914 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
  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
  UCD45456  Quercus chrysolepis F. W. Peirson 1918-5-19 16 Los Angeles Echo Mountain, 3400 ft. San Gabriel Range. 1036 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
  UCD64091  Digitaria sanguinalis F. W. Peirson 1917-9-1 1592 Los Angeles 1077 New York Avenue, Altadena. 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
  UCR129341  Allium lacunosum var. davisiae F. W. Peirson 1926-4-26 6658 Los Angeles Mojave Desert, 2 miles east of Palmdale 793 Comment
  UCR129355  Heuchera elegans F. W. Peirson 1924-5-27 4639 Los Angeles San Gabriel Mtns., north slope, Strawberry Peak 1753 Comment
  UCR208134  Cryptantha oxygona F. W. Peirson 1921-6-15 2463 Los Angeles San Gabriel Mtns., trail from Pine Flats to Chilao Comment
  UCR208880  Plantago patagonica F. W. Peirson 1921-5-20 2410 Los Angeles Transverse Ranges; San Gabriel Mountains, Little Rock Creek 960 Comment
  UCSB24354  Epilobium glaberrimum Peirson, Frank 1921-7-17 Los Angeles Prairie Fork, San Gabriel River, San Gabriel Mountains 2011 Comment
  CAS-BOT-BC116601  Carex subfusca Frank Warrington Peirson 1922-7-21 4267 Los Angeles North slope of Baldy San Gabriel Mts. 2987 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-BC153184  Diplacus johnstonii Frank W. Peirson 1920-6-10 196 Los Angeles Divide between Mt. Lowe and Mt. Markham 1645 Comment
  CAS-BOT-BC17666  Carex alma Frank W. Peirson 1918-5-21 1636 Los Angeles San Gabriel Mountains. Arroyo Seco Canyon. Comment
  CAS-BOT-BC241585  Eriogonum baileyi var. baileyi Frank W. Peirson 1928-9-4 8188 Los Angeles Rock Cr. 1 mile below Pallett Cr., Mohave [Mojave] Desert Comment
  CAS-BOT-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-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-BC296963  Eriophyllum wallacei Frank W. Peirson 1919-5-9 1391 Los Angeles Arraster Creek, San Gabriel Mts. 838 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-BC343065  Madia gracilis F. W. Peirson 1920-6-10 2777 Los Angeles Maple Spring, trail to Mt. Lowe, San Gabriel Mts. 1066 Comment
  CAS-BOT-BC344377  Madia exigua Frank W. Peirson 1923-5-21 3511 Los Angeles Fish Canyon, San Gabriel Mts. 914 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-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-BC419013  Persicaria lapathifolia Frank W. Peirson 1924-8-23 5151 Los Angeles West fork of San Gabriel River, just above forks, San Gabriel Mountains 411 Comment
  CAS-BOT-BC423123  Cleomella obtusifolia Frank W. Peirson 1933-5-13 10661 Los Angeles Twelve miles south of Muroc Comment
  CAS-BOT-BC426253  Lithophragma affine Frank W. Peirson 1925-4-23 5805 Los Angeles San Gabriel River 365 Comment
  CAS-BOT-BC428418  Lithophragma tenellum F. W. Peirson 1921-6-16 2442 Los Angeles Trail north of Mt. Waterman, San Gabriel Mts. 1828 Comment
  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-BC514969  Eriastrum sapphirinum subsp. dasyanthum Frank W. Peirson 1920-6-22 4708 Los Angeles Temescal Canyon 304 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-BC67710  Pellaea andromedifolia Frank W. Peirson 1919-12-2 1513 Los Angeles San Gabriel Mts. - West Fork Rubio 685 Comment
  JEPS11302  Nuttallanthus texanus Frank W. Peirson 1919-1 187 a Los Angeles San Gabriel Mountains, Rubio Canyon Rubio Canyon; San Gabriel Mountains, Rubio Canyon Comment
  JEPS11361  Mimulus nasutus Frank W. Peirson 1920-5-6 2125 Los Angeles Fish Canyon San Gabriel Mountains 609 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
  JEPS11453  Mimulus guttatus Frank W. Peirson 1918-8-6 259 Los Angeles old trail to Mt. Wilson; San Gabriel Mountains 838 Comment
  JEPS11574  Penstemon centranthifolius Frank W. Peirson 1918-5-26 200 Los Angeles Henniger Flats San Gabriel Mountains, Henniger Flats 868 Comment
  JEPS11806  Heterocodon rariflorum Frank W. Peirson 1921-6-14 1210 Los Angeles Trail Fork San Gabriel; San Gabriel Mountains 990 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
  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
  JEPS16049  Apiastrum angustifolium Frank W. Peirson 1918-5-26 133 Los Angeles San Gabriel Mountains, Henniger Flats Henniger Flats; San Gabriel Mountains, Henniger Flats 868 Comment
  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
  JEPS2406  Phacelia distans Frank W. Peirson 1919-1 311 Los Angeles Arroyo Seco San Gabriel Mountains 381 Comment
  JEPS27003  Caulanthus heterophyllus Frank W. Peirson 1918-6-4 63 Los Angeles e Rubio Canyon (northern outskirts of Altadena); foothills at southern base San Gabriel Mountains 609 Comment
  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
  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
  JEPS36685  Lactuca serriola F. W. Peirson 1921-7-20 1488 Los Angeles San Gabriel River San Gabriel Mts., San Gabriel River 457 Comment
  JEPS37247  Senecio vulgaris F. W. Peirson 1918-10-21 290 Los Angeles Opids Camp San Gabriel Mts., West Fork San Gabriel River 1219 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
  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
  JEPS41758  Erigeron divergens Frank W. Peirson 1921-7-16 2500 Los Angeles Prairie Fork San Gabriel Mts., San Gabriel River-Prairie Fork 1554 Comment
  JEPS42751  Mentzelia micrantha Frank W. Peirson 1918-6-12 119 Los Angeles San Gabriel Mts., Lower Rubio Canyon 579 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
  JEPS43822  Clarkia rhomboidea Frank W. Peirson 1920-6-10 2161 Los Angeles trail by Mt. Markham; San Gabriel Mountains 1645 Comment
  JEPS43824  Clarkia epilobioides Frank W. Peirson 1919-5-18 433 Los Angeles hills e Monrovia Canyon; San Gabriel Mountains 457 Comment
  JEPS43881  Epilobium glaberrimum subsp. glaberrimum Frank W. Peirson 1921-7-17 2499 Los Angeles Prairie Fork <of> San Gabriel Riv. San Gabriel Mountains 2011 Comment
  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
  JEPS47135  Cuscuta subinclusa Frank W. Peirson 1918-6-28 150 Los Angeles e of Rubio Canyon 609 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
  JEPS50919  Silene gallica Frank W. Peirson 1919-5-14 420 Los Angeles Eaton Canyon San Gabriel Mountains, Eaton Canyon 731 Comment
  JEPS50920  Silene multinervia Frank W. Peirson 1925-4-23 5789 Los Angeles San Gabriel Canyon at Forks , San Gabriel Canyon at Forks (San Gabriel Mts.) 533 Comment
  JEPS5136  Plectritis ciliosa subsp. insignis Frank W. Peirson 1925-4-23 5807 Los Angeles San Gabriel Canyon, below Forks San Gabriel Canyon 365 Comment
  JEPS51380  Polycarpon depressum Frank W. Peirson 1918-6-4 46 Los Angeles foothills e Rubio Canyon; e of Rubio Canyon 609 Comment
  JEPS51475  Arenaria macradenia Frank W. Peirson 1918-6-16 44 Los Angeles On the road w Acton Comment
  JEPS51490  Arenaria serpyllifolia var. serpyllifolia Frank W. Peirson 1924-5-27 4622 Los Angeles San Gabriel Mts., Colbys Ranch 975 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
  JEPS5202  Fritillaria biflora Frank W. Peirson 1921-4-10 1675 Los Angeles Sycamore Flat to San Dimas Canyon; San Gabriel Mountains 792 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
  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
  JEPS54207  Thysanocarpus laciniatus Frank W. Peirson 1919-3-30 59 a Los Angeles Tujunga Canyon; San Gabriel Mountains, Tujunga Canyun 457 Comment
  JEPS54624  Astragalus didymocarpus var. didymocarpus Frank W. Peirson 1920-3-28 2102 Los Angeles Tujunga Tujunga (on low hill road crosses at foot of canyon) 457 Comment
  JEPS55109  Thalictrum fendleri var. polycarpum Frank W. Peirson 1918-5-21 53 Los Angeles Arroyo Seco 396 Comment
  JEPS55284  Lathyrus vestitus var. vestitus Frank W. Peirson 1918-5-12 104 Los Angeles Arroyo Seco San Gabriel Mts. 396 Comment
  JEPS55857  Lotus strigosus Frank W. Peirson 1919-3-27 351 Los Angeles Arroyo Seco San Gabriel Mountains 396 Comment
  JEPS55858  Lotus strigosus Frank W. Peirson 1918-5-26 322 Los Angeles Henniger Flats San Gabriel Mountains 853 Comment
  JEPS55896  Lotus scoparius Frank W. Peirson 1918-6-12 98 Los Angeles e of Rubio Canyon; San Gabriel Mountains 609 Comment
  JEPS56544  Eriogonum parishii Frank W. Peirson 1923-8-31 4004 Los Angeles 4 mi e Big Pines Camp (summit of Blue Ridge); Blue Ridge 2590 Comment
  JEPS56852  Eriogonum inerme Frank W. Peirson 1921-6-15 2452 Los Angeles Pine Flat San Gabriel Mountains, Pine Flat 1676 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
  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
  JEPS61529  Allium haematochiton Frank W. Peirson 1921-4-21 2401 Los Angeles Sycamore Flat to San Dimas Canyon; San Gabriel Mountains 792 Comment
  JEPS61725  Calochortus splendens Frank W. Peirson 1918-6-12 8 Los Angeles e of Rubio Canyon Comment
  JEPS62536  Salvia apiana Frank W. Peirson 1918-6-28 180 Los Angeles Mt. Lowe foothills Mt. Lowe Comment
  JEPS63352  Monardella macrantha Frank W. Peirson 1918-7-13 183 Los Angeles trail near Studevants; San Gabriel Mts., West Fork San Gabriel River 1295 Comment
  JEPS6395  Plantago erecta Frank W. Peirson 1919-3-27 329 Los Angeles Arroyo Seco San Gabriel Mountains 411 Comment
  JEPS65442  Lupinus sparsiflorus Frank W. Peirson 1918-6-12 87 Los Angeles foothills e Rubio Canyon; foothills e of Rubio Canyon 609 Comment
  JEPS65553  Melilotus albus Frank W. Peirson 1919-5-21 450 Los Angeles Arroyo Seco San Gabriel Mountains 426 Comment
  JEPS65805  Trifolium ciliolatum Frank W. Peirson 1919-4-19 378 Los Angeles Pacoim Canyon San Gabriel Mtns 685 Comment
  JEPS66005  Trifolium monanthum subsp. grantianum Frank W. Peirson 1918-7-7 92 Los Angeles San Gabriel Mountains, Ontario Ridge Ontario Ridge; San Gabriel Mountains, Ontario Ridge Comment
  JEPS66177  Vicia ludoviciana var. ludoviciana Frank W. Peirson 1920-5-12 2127 Los Angeles San Gabriel River; San Gabriel Mountains 228 Comment
  JEPS67674  Cryptantha intermedia Frank W. Peirson 1919-2-12 320 Los Angeles Arroyo Seco San Gabriel Mountains 457 Comment
  JEPS69103  Eriastrum sapphirinum Frank W. Peirson 1921-7-1 922 Los Angeles Arraster Creek San Gabriel Mountains (n slope of mt.) 944 Comment
  JEPS69451  Gilia angelensis Frank W. Peirson 1918-5-26 157 Los Angeles Hennigers Flats San Gabriel Mts., Hennigers Flats 868 Comment
  JEPS69536  Gilia capitata subsp. abrotanifolia Frank W. Peirson 1918-6-4 154 Los Angeles e Rubio Canyon (San Gabriel Mountains); , e of Rubio Canyon 609 Comment
  JEPS6992  Antirrhinum coulterianum Frank W. Peirson 1918-6-12 188 Los Angeles Rubio Canyon foothills Rubio Canyon; San Gabriel Mountains 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
  JEPS9847  Castilleja miniata Frank W. Peirson 1920-9-14 2286 Los Angeles Coldwater Canyon; San Gabriel Mountains 2133 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
  LA38971  Mimulus guttatus Frank W. Peirson; 1921-6-19 4721 Los Angeles San Gabriel Mountains, Groverland Canyon, N fork San Gabriel River 1036 Comment
  PASA1013  Collinsia bicolor var. austromontana Frank W. Peirson 1921-6-21 Los Angeles West Fork San Gabriel River 761 Comment
  PASA1317  Arenaria douglasii Frank W. Peirson 1923-5-21 Los Angeles Fish Canyon, San Gabriel Mts. 914 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
  PASA1740  Haplopappus palmeri var. pachylepis Frank W. Peirson 1921-11-11 Los Angeles Lower part of Bouquet Canyon 426 Comment
  PASA1742  Haplopappus cooperi Frank W. Peirson 1921-5-19 Los Angeles Little Rock Creek Comment
  PASA1777  Malvastrum exile Frank W. Peirson 1923-5-27 Los Angeles Pallett Creek, San Gabriel Mts. 1097 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
  PASA2004  Amsinckia tessellata Frank W. Peirson 1930-5-12 Los Angeles Along Blvd. about opposite Acton 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
  PASA2282  Antennaria dimorpha Frank W. Peirson 1921-6-15 Los Angeles Pine Flats, San Gabriel Mts. 1676 Comment
  PASA2285  Gnaphalium chilense Frank W. Peirson 1921-6-19 Los Angeles Crystal Lake, North Fork San Gabriel River 1676 Comment
  PASA2313  Layia glandulosa Frank W. Peirson 1925-4-23 Los Angeles San Gabriel River 396 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
  PASA322  Malacothrix clevelandii Frank W. Peirson 1923-5-21 Los Angeles Fish Canyon, San Gabriel Mts. 792 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
  PASA392  Brassica adpressa Frank W. Peirson 1924-10-26 Los Angeles Arroyo Seco, along stream below California Sreet Bridge 198 Comment
  PASA426  Rhamnus cuspidata Frank W. Peirson 1921-7-17 Los Angeles Prairie Fork of San Gabriel River 2011 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
  PASA924  Crepis acuminata Frank W. Peirson 1921-7-17 Los Angeles Praire Fork of the San Gabriel River 2011 Comment
  PASA974  Antirrhinum strictum Frank W. Peirson 1925-4-23 Los Angeles Forks of the San Gabriel River 533 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
Read comments
Jan 30 2017
  POM11873  Limosella acaulis F. W. Peirson 1922-7-7 s.n. Los Angeles Swartout Valley, Wright's Ranch. 1845 Comment
  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
  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
  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
  POM47060  Arenaria serpyllifolia subsp. serpyllifolia F. W. Peirson 1924-5-27 4622 Los Angeles Colby s Ranch. San Gabriel Mountains. 3018 Comment
  POM47656  Collomia grandiflora F. W. Peirson 1924-5-28 4634 Los Angeles Hoyt Ranch, Tujunga Canyon, San Gabriel Mountains. 579 Comment
  POM47657  Carex multicaulis F. W. Peirson 1924-5-27 4626 Los Angeles north slope of Strawberry Peak, San Bernardino Mts. 1524 Comment
  POM47666  Silene antirrhina F. W. Peirson 1921-6-19 2681 Los Angeles North Fork of San Gabriel River 1006 Comment
  POM60684  Oligomeris linifolia F. W. Peirson 1908-4-18 1924 Los Angeles Point Fermin. Comment
  POM69717  Mentzelia dispersa F. W. Peirson 1922-5-30 3074 Los Angeles west spur of Mt. Lowe 1372 Comment
  POM93103  Corethrogyne filaginifolia var. californica F. W. Peirson 1264 Los Angeles Coldwater Canyon, Santa Monica Mts. 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
  POM9689  Astragalus didymocarpus var. dispermus F. W. Peirson 1919-5-11 398 Los Angeles Arraster [Arrastre] Creek, north slope of San Gabriel Mts. 853 Comment
  POM9737  Equisetum laevigatum F. W. Peirson 1920-5-12 2133 Los Angeles El Monte 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
  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
  POM9924  Forestiera pubescens F. W. Peirson 1921-5-19 s.n. Los Angeles Little Rock Creek 945 Comment
  POM9926  Sphaeralcea emoryi subsp. variabilis F. W. Peirson 1921-5-18 s.n. Los Angeles Palmdale, Antelope Valley. Comment
  POM99353  Symphoricarpos rotundifolius var. parishii F. W. Peirson 1921-6-17 2439 Los Angeles along stream north of Mt Waterman. San Gabriel Mountains. 1859 Comment
  POM9942  Layia glandulosa F. W. Peirson 1921-7-3 s.n. Los Angeles 2 miles east of Rock Creek 2287 Comment
  POM9944  Trichostema lanatum F. W. Peirson 1918-6-15 s.n. Los Angeles Mint Canyon. Comment
  RSA0001375  Lessingia lemmonii var. peirsonii F. W. Peirson 1923-6-9 3550 Los Angeles Lowest point between the divides of Pine and Oak Grove Canyons, Liebre Mts. 1174 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
  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
  RSA0004201  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
  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
  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
  RSA0006818  Astragalus miguelensis F. W. Peirson 1923-4-8 3467 Los Angeles On south side of San Clemente Island. Comment
  RSA0008517  Pentachaeta lyonii F. W. Peirson 1908-4-18 1223 Los Angeles Point Fermin. Comment
  RSA0011736  Asplenium vespertinum F. W. Peirson 1919-12-28 1520 Los Angeles Middle Eaton Canyon, south face of San Gabriel Mts. 610 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
  RSA0017014  Quercus john-tuckeri F. W. Peirson 1919-5-11 404 Los Angeles Arraster [Arrastre] Creek, north slope of San Gabriel Mts. 854 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
  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
  RSA0017216  Gilia ochroleuca subsp. bizonata F. W. Peirson 1921-5-20 4135 Los Angeles Little Rock Creek: north base of San Gabriel Mountains. 1006 Comment
  RSA0019985  Bromus tectorum F. W. Peirson 1922-7-5 5363 Los Angeles Big Pines Camp, north side of San Gabriel Mountains 2104 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
  RSA0059184  Orobanche uniflora subsp. occidentalis Frank W. Peirson 1921-5-12 1174 Los Angeles Big Santa Anita Trail, south slope of San Gabriel Mts. 762 Comment
  RSA0060162  Poa secunda subsp. secunda F. W. Peirson 1918-5-19 1548 Los Angeles Along trolley track on Echo Mt., San Gabriel Range. 1066 Comment
  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
  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
  RSA0066510  Orobanche fasciculata Frank W. Peirson 1920-5-28 465 Los Angeles San Antonio Canyon, San Gabriel Mts. 1463 Comment
  RSA0074503  Heterotheca fastigiata F. W. Peirson 1920-9-13 5274 Los Angeles San Antonio Canyon, San Gabriel Mts. 1981 Comment
  RSA0074530  Heterotheca fastigiata F. W. Peirson 1920-3-28 5273 Los Angeles Tujunga Canyon, Western San Gabriel Mountains. 427 Comment
  RSA0074532  Heterotheca fastigiata F. W. Peirson 1924-10-26 5263 Los Angeles Arroyo Seco, Pasadena. 198 Comment
  RSA0075645  Heterotheca grandiflora F. W. Peirson 1918-10-15 281 Los Angeles Foot of Echo Mountain Trail, south base of San Gabriel Mts. 548 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
  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
  RSA0079461  Cryptantha muricata var. jonesii F. W. Peirson 1925-4-23 5794 Los Angeles Burned hillslope at forks of San Gabriel River. 533 Comment
  RSA0089955  Amsinckia retrorsa F. W. Peirson 1919-3-26 361 Los Angeles South side of New York Drive, east of Hill Ave., Altadena. 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
  RSA0091457  Amsinckia tessellata F. W. Peirson 1932-4-17 9856 Los Angeles Below Lovejoy Dam, Lovejoy Buttes, southwestern Mojave Desert. 762 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
  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
  RSA0117383  Collinsia parryi F. W. Peirson 1923-5-21 3514 Los Angeles Fish Canyon, San Gabriel Mountains. 732 Comment
  RSA0117387  Collinsia parryi F. W. Peirson 1925-4-23 5791 Los Angeles Forks of San Gabriel River. 534 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
  RSA0123055  Eriastrum sapphirinum subsp. brevibracteatum F. W. Peirson 1922-7-7 4128 Los Angeles Sheep Creek. North base of San Gabriel Mountains. 1448 Comment
  RSA0126321  Nemacladus longiflorus var. longiflorus F. W. Peirson 1921-6-21 2453 Los Angeles West Fork of San Gabriel River. 610 Comment
  RSA0126419  Nemacladus sigmoideus F. W. Peirson 1927-5-7 7265 Los Angeles 4 miles east of Lancaster. 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
  RSA0128662  Arabis repanda var. repanda F. W. Peirson 1919-6-14 507 Los Angeles Rock Creek, north slope of San Gabriel Mountains 1707 Comment
  RSA0128745  Boechera californica F. W. Peirson 1918-5-19 62 Los Angeles Near Dawn Station on trolley line to Mt. Lowe. 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
  RSA100277  Plectritis ciliosa subsp. insignis F. W. Peirson 1951-5-13 1204 Los Angeles Arroyo Seco, Pasadena Comment
  RSA409729  Cuscuta subinclusa F. W. Peirson 1924-10-26 57 [6]1 Los Angeles Arroyo Seco, Pasadena. 198 Comment
  RSA523557  Plantago erecta F. W. Peirson 1919-3-27 329 Los Angeles Arroyo Seco near Pasadena 412 Comment
  RSA64575  Eriogonum saxatile F. W. Peirson 1929-7-1 8434 Los Angeles San Gabriel Mountains: Tie Canyon, Aliso Creek tributary; trail to Mt. Pacifico. 1433 Comment
  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
  RSA64586  Eriogonum pusillum F. W. Peirson 1923-5-27 4203 Los Angeles Pallett Creek, north slope of San Gabriel Mountains 1098 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
  RSA64775  Oxytheca trilobata F. W. Peirson 1921-6-14 1783 Los Angeles Tujunga, W end of San Gabriel Mts. 1280 Comment
Read comments
Oct 23 2009
  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
  RSA64804  Chenopodium fremontii F. W. Peirson 1923-8-31 4023 Los Angeles Blue Ridge, north slope of San Gabriel Mountains. 2591 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
  RSA65067  Silene verecunda subsp. platyota F. W. Peirson 1929-7-1 8433 Los Angeles San Gabriel Mountains: Tie Canyon, Aliso Creek tributary; trail to Mt. Pacifico 1433 Comment
  RSA65164  Loeflingia squarrosa var. squarrosa F. W. Peirson 1921-6-20 5348 Los Angeles N fork San Gabriel River 914 Comment
  RSA65343  Atriplex truncata F. W. Peirson 1904-8-22 1819 Los Angeles Playa del Rey, coast of Los Angeles Co. Comment
  RSA65368  Rumex acetosella F. W. Peirson 1924-5-27 4630 Los Angeles Colby's Ranch 976 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
  RSA65462  Rumex maritimus F. W. Peirson 1921-6-19 2449 Los Angeles Crystal Lake, North Fork San Gabriel River 1677 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
  RSA65478  Rumex salicifolius var. denticulatus F. W. Peirson 1921-6-18 4218 Los Angeles Crystal Lake, North Fork of San Gabriel River 1677 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
  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
  RSA65559  Polycarpon tetraphyllum F. W. Peirson 1945-6-15 s.n. Los Angeles Parking space at Anoakia School, Foothill Blvd. Arcadia or south of Sierra Madre. 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
  RSA65627  Elatine brachysperma F. W. Peirson 1921-6-19 2470 Los Angeles Crystal Lake, North Fork San Gabriel River 1676 Comment
  RSA65660  Cardionema ramosissimum F. W. Peirson 1863 Los Angeles Playa del Rey. Comment
  RSA65688  Portulaca oleracea F. W. Peirson 1861 Los Angeles Altadena. Comment
  RSA65694  Silene laciniata subsp. major F. W. Peirson 1923-5-21 4288 Los Angeles Fish Canyon, San Gabriel Mountains. 610 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
  RSA65739  Claytonia perfoliata subsp. mexicana F. W. Peirson 1919-1-5 35 Los Angeles Monrovia Canyon, San Gabriel Mountains 579 Comment
  RSA65744  Mollugo verticillata F. W. Peirson 1951-8-18 1855 Los Angeles Long Beach Park, Long Beach Comment
  RSA65760  Stellaria nitens F. W. Peirson 1918-5-26 43 Los Angeles Hennigers Flat, Mt. Wilson Toll Road 853 Comment
  RSA65793  Lepidium virginicum var. pubescens F. W. Peirson 1921-3-3 2357 Los Angeles Hills west of Arroyo Seco, near Pasadena 426 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
  RSA65825  Sisymbrium officinale F. W. Peirson 1919-4-19 1899 Los Angeles Pacoima Canyon, west end of San Gabriel Mts. 579 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
  RSA65870  Polygonum hydropiperoides var. asperifolium F. W. Peirson 1923-1-21 1792 Los Angeles Pond north of East Lake Park, Los Angeles. Comment
  RSA65884  Monolepis nuttalliana F. W. Peirson 1932-4-17 9849 Los Angeles Near dam head, Lovejoy Buttes, Mohave Desert 762 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
  RSA65920  Rumex conglomeratus F. W. Peirson s.n. Los Angeles Arroyo Seco Canyon, San Gabriel Mts. 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
  RSA65996  Eriogonum deflexum var. baratum F. W. Peirson 1921-7-2 2471 Los Angeles San Gabriel Mountains: Pallett Creek 1082 Comment
  RSA66005  Eriogonum parishii F. W. Peirson 1923-8-31 4004 Los Angeles Blue Ridge, north slope of San Gabriel Mountains. 2591 Comment
  RSA66026  Eriogonum gracile var. gracile F. W. Peirson 1918-11-2 296 Los Angeles Hennigers Flat, north San Gabriel Mts. 854 Comment
  RSA66042  Eriogonum baileyi var. baileyi F. W. Peirson 1928-7-1 8417 Los Angeles San Gabriel Mountains: Aliso Canyon 1098 Comment
  RSA66045  Eriogonum baileyi var. baileyi F. W. Peirson 1928-9-4 8188 Los Angeles Rock Creek about 1 mile below Pallett Creek Comment
  RSA66068  Rorippa curvisiliqua F. W. Peirson 1906-7-16 s.n. Los Angeles Los Angeles River, San Fernando Valley Comment
  RSA66085  Tropidocarpum gracile F. W. Peirson 1903-2-24 1902 Los Angeles Eagle Rock Valley 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
  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
  RSA66237  Platystemon californicus F. W. Peirson 1903-2-24 1885 Los Angeles Valley at Eagle Rock Comment
  RSA66259  Dicentra chrysantha F. W. Peirson 1918-7-7 56 Los Angeles San Antonio Canyon Comment
  RSA66260  Dicentra chrysantha F. W. Peirson 1903-8-10 s.n. Los Angeles Summit of Mt. Lowe, San Gabriel Mts. 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
  RSA66311  Fallopia convolvulus F. W. Peirson 1918-5-26 1800 Los Angeles Hennigers Flat, Mt. Wilson Toll Road 854 Comment
  RSA66322  Polygonum lapathifolium F. W. Peirson 1924-8-23 5051 Los Angeles West Fork of San Gabriel River. 412 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
  RSA66504  Arabis glabra F. W. Peirson 1919-4-9 390 Los Angeles Rubio Canyon. 549 Comment
  RSA66527  Athysanus pusillus F. W. Peirson 1919-4-5 60 Los Angeles Old Trail to Mt. Wilson, San Gabriel Mts. 762 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
  RSA66752  Caulanthus heterophyllus var. heterophyllus F. W. Peirson 1919-3-17 4186 Los Angeles Hills west of Arroyo Seco, Pasadena 426 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
  RSA66757  Caulanthus heterophyllus var. heterophyllus F. W. Peirson 1919-3-30 666 Los Angeles Tujunga Canyon, west end of San Gabriel Mts. 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
  RSA68340  Lepidium lasiocarpum F. W. Peirson 1923-4-8 3448 Los Angeles Wilsons Cove, San Clemente Island. 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
  RSA68649  Calochortus kennedyi Frank W. Peirson 1917-5-13 2850 Los Angeles Road east of Palmdale, Mojave Desert. Comment
  RSA68688  Muilla maritima F. W. Peirson 5 Los Angeles east bank of Arroyo Seco, Pasadena. 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
  RSA68968  Plantago major F. W. Peirson 462 Los Angeles Weed AT 1085 New York Drive, Altadena. 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
  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
  RSA69266  Chimaphila menziesii F. W. Peirson 1919-7-29 524 Los Angeles Summit of Mt. Wilson, San Gabriel Mountains 1738 Comment
  RSA69418  Eustoma exaltatum F. W. Peirson 1917-5-1 880 Los Angeles Topanga Canyon, Santa Monica Mountains. 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
  RSA69563  Mentzelia veatchiana F. W. Peirson 1920-4-26 2110 Los Angeles Santa Anita Wash, S base of San Gabriel Mts. 213 Comment
  RSA69572  Mentzelia micrantha F. W. Peirson 1919-5-14 2302 Los Angeles East trail to Mount Lowe. 1067 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
  RSA69574  Mentzelia micrantha F. W. Peirson 1921-6-20 2465 Los Angeles N fork San Gabriel River 915 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
  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
  RSA69708  Mentzelia albicaulis F. W. Peirson 1932-4-17 9853 Los Angeles Below the Lovejoy Dam, Lovejoy Buttes, Mojave Desert. 762 Comment
  RSA69803  Centaurium venustum F. W. Peirson 1921-7-19 144 Los Angeles At forks of Coldwater Canyon and Cattle Canyon, East Fork San Gabriel Canyon 793 Comment
  RSA69861  Juncus torreyi F. W. Peirson 1928-9-4 8186 Los Angeles about 1 mile above Pallett Creek Comment
  RSA69964  Abronia umbellata F. W. Peirson 1843 Los Angeles Long Beach Comment
  RSA70009  Amaranthus retroflexus F. W. Peirson 1951-1 1842 Los Angeles Altadena. 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
  RSA70035  Salicornia virginica F. W. Peirson 1904-8-22 1837 Los Angeles Playa del Rey, coast of Los Angeles Co. Comment
  RSA70061  Juncus rugulosus F. W. Peirson 1924-8-23 5057 Los Angeles west fork of San Gabriel River 411 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
  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
  RSA70316  Juncus xiphioides F. W. Peirson 1930-5-21 8916 Los Angeles Below Lovejoy Dam, southwest Mojave Desert. 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
  RSA70400  Chamaesyce serpillifolia subsp. serpillifolia F. W. Peirson 1924-9-1 5171 Los Angeles Arrastre Flat. 2271 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
  RSA70534  Chamaesyce melanadenia F. W. Peirson 1919-1-25 310 Los Angeles Arroyo Seco, near Pasadena 381 Comment
  RSA70535  Chamaesyce melanadenia F. W. Peirson 1924-12-5 5380 Los Angeles Large colony on open bank above trail; Little Samnta Anita Canyon. Comment
  RSA70545  Euphorbia spathulata F. W. Peirson 1908-4-18 2037 Los Angeles Point Fermin 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
  RSA71004  Cuscuta subinclusa F. W. Peirson 1919-1-25 261 Los Angeles Arroyo Seco, near Pasadena 381 Comment
  RSA71014  Cressa truxillensis F. W. Peirson 896 Los Angeles Banning Wharf, San Pedro. Comment
  RSA71793  Saltugilia splendens subsp. grantii F. W. Peirson 1927-6-14 7345 Los Angeles San Antonio Canyon, San Gabriel Mountains. 823 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
  RSA71829  Saltugilia splendens subsp. splendens F. W. Peirson 1925-4-23 5785 Los Angeles Forks of San Gabriel River. 534 Comment
  RSA71837  Gilia leptantha subsp. transversa F. W. Peirson 1926-4-26 6659 Los Angeles 2 miles southeast of Little Rock. Comment
  RSA71842  Gilia latiflora subsp. latiflora F. W. Peirson 1917-5-13 1950 Los Angeles Near Little Rock, Mojave Desert. Comment
  RSA71900  Gilia angelensis F. W. Peirson 1918-5-5 915 Los Angeles Brents on the Malibu, Santa Monica Mountains. Comment
  RSA71951  Collomia grandiflora F. W. Peirson 1923-6-9 3548 Los Angeles Pine Canyon, Elizabeth Lake 1159 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
  RSA72111  Epilobium brachycarpum F. W. Peirson 1920-9-5 124 Los Angeles Toll Road to Mt. Wilson. 915 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
  RSA72194  Oenothera californica subsp. californica F. W. Peirson 781 Los Angeles Los Angeles River, San Fernando Valley Comment
  RSA72235  Camissonia palmeri F. W. Peirson 1926-5-8 6727 Los Angeles 12 miles E of Palmdale, Antelope Valley Comment
  RSA72292  Gilia angelensis F. W. Peirson 1918-5-26 157 Los Angeles Hennigers Flat, Mt. Wilson Toll Road 853 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
  RSA73005  Linanthus aureus F. W. Peirson 1917-5-13 947 Los Angeles West of Little Rock. Comment
  RSA73006  Linanthus parryae F. W. Peirson 1917-5-13 945 Los Angeles West of Little Rock. 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
  RSA73027  Leptosiphon bicolor F. W. Peirson 1923-4-9 3428 Los Angeles San Clemente Island: Lemon Tank; north shore 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
  RSA73039  Linanthus dichotomus subsp. pattersonii F. W. Peirson 1919-5-10 393 Los Angeles Arraster [Arrastre] Creek. North base of San Gabriel Mountains 915 Comment
  RSA73042  Leptosiphon parviflorus F. W. Peirson 1919-5-18 4711 Los Angeles Hills east of Monrovia Canyon 457 Comment
  RSA73055  Leptosiphon lemmonii F. W. Peirson 1920-4-26 2111 Los Angeles Santa Anita Wash above Foothill Blvd. 213 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
  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
  RSA73334  Clarkia epilobioides F. W. Peirson 1919-5-18 433 Los Angeles Hills east of Monrovia Canyon 457 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
  RSA74143  Phacelia distans F. W. Peirson 1923-5-21 3512 Los Angeles South face of San Gabriel Mountains. Fish Canyon. 793 Comment
  RSA74150  Phacelia tanacetifolia F. W. Peirson 1919-3-30 311 Los Angeles Tujunga Canyon, west end of San Gabriel Mountains. 457 Comment
  RSA74159  Phacelia tanacetifolia F. W. Peirson 1932-4-17 9855 Los Angeles Margin of Lovejoy Dam, Lovejoy Buttes, SW Mojave Desert. 762 Comment
  RSA74168  Phacelia ciliata F. W. Peirson 1903-2-14 967 Los Angeles Road to Pasadena from Los Angeles. Comment
  RSA74501  Phacelia minor F. W. Peirson 1923-5-4 3488 Los Angeles Foot of canyon, Arroyo Seco near Pasadena 381 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
  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
  RSA75424  Camissonia californica F. W. Peirson 1951-1 349 Los Angeles Hills west of Arroyo Seco, Pasadena. 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
  RSA75510  Phacelia brachyloba F. W. Peirson 1918-6-10 160 Los Angeles E trail to Mt Low, San Gabriel Mts 915 Comment
  RSA75517  Phacelia fremontii F. W. Peirson 1922-7-7 4477 Los Angeles west end of Swartout Valley 2012 Comment
  RSA75525  Phacelia fremontii F. W. Peirson 1917-5-13 963 Los Angeles Near Little Rock, Mojave Desert. Comment
  RSA75530  Phacelia fremontii F. W. Peirson 1933-5-13 10663 Los Angeles About 10 miles south of Munroc, Western Mojave Desert. Comment
  RSA75532  Phacelia fremontii F. W. Peirson 1928-6-2 7947 Los Angeles Open clearing, south fork of Rock Creek, San Gabriel Range 1463 Comment
  RSA75796  Pholistoma auritum F. W. Peirson 1918-4-28 441 Los Angeles Turnbull Canyon near Whittier, Puente Hills. 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
  RSA76282  Eriastrum sapphirinum subsp. sapphirinum F. W. Peirson 1922-7-7 4128 Los Angeles Sheep Creek. North base of San Gabriel Mountains. 1448 Comment
  RSA76283  Eriastrum sapphirinum subsp. dasyanthum F. W. Peirson 1956-11-2 156 Los Angeles Mt. Wilson Road, San Gabriel Mts 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
  RSA77066  Loeseliastrum matthewsii F. W. Peirson 1930-5-31 8910 Los Angeles Below Lovejoy Dam, Lovejoy Buttes, southwestern Mojave Desert. Comment
  RSA77179  Malvella leprosa F. W. Peirson 1951-8-18 2301 Los Angeles east of Long Beach Comment
  RSA77184  Malva nicaeensis F. W. Peirson 1923-3-23 3356 Los Angeles Claremont. Comment
  RSA77256  Emmenanthe penduliflora var. penduliflora F. W. Peirson 168 Los Angeles Benedict s Canyon Comment
  RSA77419  Datisca glomerata F. W. Peirson 1904-8-28 122 Los Angeles Little Santa Anita Canyon, south base of San Gabriel Mts. 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
  RSA77502  Aralia californica F. W. Peirson 1904-8-28 131 Los Angeles Little Santa Anita Canyon, south base of San Gabriel Mts. 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
  RSA77640  Marah macrocarpa F. W. Peirson 1919-1-25 308 Los Angeles Foot of Arroyo Seco Canyon, Pasadena 381 Comment
  RSA77726  Viola purpurea subsp. purpurea F. W. Peirson 1920-5-28 2671 Los Angeles Bear Canyon, San Gabriel Mts. 1402 Comment
  RSA77747  Viola pedunculata F. W. Peirson 1923-4-9 3443 Los Angeles San Clemente Island: about 6 miles SE of Wilson's Cove. Comment
  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
  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
  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
  RSA79600  Cryptantha intermedia F. W. Peirson 1923-4-9 3423 Los Angeles About 3 miles SE of Wilson s Cove, San Clemente Island Comment
  RSA79626  Cryptantha simulans F. W. Peirson 1920-6-10 2157 Los Angeles [San Gabriel Mountains] summit of Mt. Wilson. 1737 Comment
Read comments
Feb 1 2017
  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
  RSA80076  Mimulus floribundus F. W. Peirson 1921-6-19 2456 Los Angeles Crystal Lake, North Fork San Gabriel River 1677 Comment
  RSA80122  Mimulus cardinalis F. W. Peirson 1924-8-23 5054 Los Angeles West Fork of San Gabriel River. 412 Comment
  RSA80136  Mimulus guttatus F. W. Peirson 1903-4-2 1126 Los Angeles Ditch near Elysian Park, Los Angeles. Comment
  RSA80169  Collinsia heterophylla F. W. Peirson 1924-5-26 4629 Los Angeles Trail to Switzer's Camp, San Gabriel Mountains 686 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
  RSA80191  Plagiobothrys canescens F. W. Peirson 1918-4-28 2735 Los Angeles Turnbull Canyon near Whittier, Puente Hills. 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
  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
  RSA80432  Antirrhinum kelloggii F. W. Peirson 1925-4-23 5787 Los Angeles Forks of San Gabriel River. 534 Comment
  RSA80445  Mimulus guttatus F. W. Peirson 1920-4-25 2116 Los Angeles Verdugo Canyon 274 Comment
  RSA80446  Mimulus guttatus F. W. Peirson 1921-6-21 2461 Los Angeles West Fork of San Gabriel River 884 Comment
  RSA80447  Mimulus guttatus F. W. Peirson 1923-4-10 3471 Los Angeles 5 mi. SE of Wilson Cove. Canyon about 5 mi. southeast of Eagle Ranch, San Clemente Island. Comment
Read comments
May 16 2008
  RSA80448  Mimulus guttatus F. W. Peirson 1922-5-30 3073 Los Angeles Millard's Canyon, San Gabriel Mountains 991 Comment
  RSA80463  Mimulus guttatus F. W. Peirson 1920-5-6 2125 Los Angeles Fish Canyon, San Gabriel Mountains 610 Comment
  RSA80464  Mimulus guttatus F. W. Peirson 1921-6-19 4721 Los Angeles North Fork of San Gabriel River 1037 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
  RSA80495  Mimulus fremontii F. W. Peirson 1917-5-13 1129 Los Angeles Roadside bear Little Rock, Antelop Valley. Comment
  RSA80647  Boisduvalia glabella F. W. Peirson 1906-7-19 2083 Los Angeles Sink near Inglewood. 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
  RSA80769  Nicotiana bigelovii var. wallacei F. W. Peirson 1090 Los Angeles L. A River, San Fernando Valley. 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
  RSA80833  Pedicularis densiflora F. W. Peirson 1925-4-23 5798 Los Angeles Forks of San Gabriel River 530 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
  RSA82050  Cordylanthus rigidus subsp. setiger F. W. Peirson 1924-7-11 5396 Los Angeles Mt. Washburn trail near Switzers Camp. 1037 Comment
  RSA82051  Cordylanthus rigidus subsp. setiger F. W. Peirson 1918-8-6 255 Los Angeles Mt. Wilson Toll Road 869 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
  RSA82403  Salvia mellifera F. W. Peirson 1920-4-18 181 Los Angeles New York St., La Canada. 610 Comment
  RSA82526  Verbascum virgatum F. W. Peirson 1919-11-16 1097 Los Angeles East end of New York Ave., Altadena. Comment
  RSA83324  Dudleya lanceolata F. W. Peirson s.n. Los Angeles Altadena. Comment
  RSA83415  Dudleya lanceolata F. W. Peirson 1919-7-1 518 Los Angeles Fish Canyon 274 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
  RSA84264  Ranunculus aquatilis var. capillaceus F. W. Peirson 1923-6-9 4304 Los Angeles Bouquet Canyon, northwest part of San Gabriel Mts. 762 Comment
  RSA84289  Equisetum hyemale var. affine F. W. Peirson 1532 Los Angeles Benedicts Canyon, Santa Monica Mts Comment
  RSA84363  Lithophragma affine F. W. Peirson 1921-5-12 4190 Los Angeles Big Santa Anita Canyon, S base of San Gabriel Mts 762 Comment
  RSA84372  Lithophragma bolanderi F. W. Peirson 1918-5-21 69 Los Angeles Arroyo Seco near Pasadena 457 Comment
  RSA84382  Lithophragma tenellum F. W. Peirson 1921-6-16 2442 Los Angeles Trail north of Mt. Waterman, San Gabriel Mountains. 1829 Comment
  RSA84421  Aquilegia formosa F. W. Peirson 1921-6-19 47 Los Angeles North Fork of San Gabriel River. 1006 Comment
  RSA84474  Ceratophyllum demersum F. W. Peirson 1921-6-19 2614 Los Angeles Crystal Lake, North Fork San Gabriel River 1676 Comment
  RSA84868  Ranunculus cymbalaria var. saximontanus F. W. Peirson 1951-1 s.n. Los Angeles Near Long Beach Comment
  RSA84979  Potamogeton illinoensis F. W. Peirson 1921-6-19 2469 Los Angeles Crystal Lake, North Fork San Gabriel River 1676 Comment
  RSA84989  Ruppia cirrhosa F. W. Peirson 1918-6-16 1540 Los Angeles Small lake south of Palmdale, west Mojave Desert. 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
  RSA85011  Adiantum aleuticum F. W. Peirson 1919-12-28 1522 Los Angeles Eaton Canyon, south base of San Gabriel Mts. 1066 Comment
  RSA85016  Polypodium californicum F. W. Peirson 1923-4-9 3441 Los Angeles north slope about 4 miles southeast of Wilson's Cove, San Clemente Island Comment
  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
  RSA85047  Polypodium californicum F. W. Peirson 1919-11-30 2838 Los Angeles South base of San Gabriel Mnts., Middle Eaton Canyon. 610 Comment
  RSA85193  Sparganium erectum subsp. stoloniferum F. W. Peirson 1919-07 1534 Los Angeles Ballona Marsh. Comment
  RSA85311  Paeonia californica F. W. Peirson 1919-1-25 314 Los Angeles Foot of Arroyo Seco Canyon, Pasadena 381 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
  RSA85557  Aspidotis californica F. W. Peirson 1919-11-30 1525 Los Angeles South base of San Gabriel Mnts., Middle Eaton Canyon. 610 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
  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
  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
  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
  RSA87439  Galium aparine F. W. Peirson 1923-4-8 3431 Los Angeles Wilson's Cove, San Clemente Island. Comment
  RSA87443  Galium aparine F. W. Peirson 1921-6-19 1184 Los Angeles North Fork of San Gabriel River. 1006 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
  RSA90047  Lotus argophyllus var. argophyllus F. W. Peirson 95 Los Angeles summit of Mt. Wilson Comment
  RSA90070  Lotus argophyllus var. argophyllus F. W. Peirson 1924-5-27 4631 Los Angeles north slope of Strawberry peak 1220 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
  RSA90155  Astragalus didymocarpus var. didymocarpus F. W. Peirson 1903-3-28 2345 Los Angeles Benedict's Canyon, Santa Monica Mountains. Comment
  RSA90157  Astragalus didymocarpus var. didymocarpus F. W. Peirson 1918-5-5 581 Los Angeles West foot of Santa Susanna Grade, Simi Valley. Comment
  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
  RSA90213  Astragalus trichopodus var. phoxus F. W. Peirson 1920-3-28 2099 Los Angeles Low hill at foot of Tujunga Canyon, west end of San Gabriel Mtns. 457 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
  RSA90270  Polypogon viridis F. W. Peirson 1920-9-17 4328 Los Angeles San Antonio Canyon, San Gabriel Mountains. 1341 Comment
  RSA90272  Polypogon viridis F. W. Peirson 1924-8-23 5056 Los Angeles Above forks of San Gabriel River, [San Gabriel Mountains] 412 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
  RSA90311  Lotus salsuginosus var. salsuginosus F. W. Peirson 1918-6-4 94 Los Angeles East of Rubio Canyon, south base of San Gabriel Mountains. 549 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
  RSA90336  Lotus scoparius F. W. Peirson 1920-3-30 98 Los Angeles Brae-burn road, Altadena. Comment
  RSA90349  Lathyrus vestitus var. vestitus F. W. Peirson s.n. Los Angeles Franklyn Canyon. Comment
  RSA90350  Lathyrus vestitus subsp. laetiflorus F. W. Peirson 1920-4-25 1926 Los Angeles Hills west of Arroyo Seco, near Pasadena 426 Comment
  RSA90351  Lotus crassifolius var. crassifolius F. W. Peirson 1919-5-18 103 Los Angeles divide between fish canyon and Monrovia canyons 976 Comment
  RSA90352  Lotus crassifolius var. crassifolius F. W. Peirson 1905-7-14 4078 Los Angeles Bear Flat 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
  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
  RSA90411  Lotus oblongifolius var. oblongifolius F. W. Peirson 1917-5-13 501 Los Angeles Big Rock Creek 1296 Comment
  RSA90413  Lotus oblongifolius var. oblongifolius F. W. Peirson 1904-8-28 4079 Los Angeles Little Santa Anita Canyon, south base of San Gabriel Mts. 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
  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
  RSA90708  Astragalus trichopodus var. lonchus F. W. Peirson 1921-2-26 586 Los Angeles Foot of Topanga Canyon, Santa Monica Mtns. Comment
  RSA90723  Astragalus leucolobus F. W. Peirson 1922-7-5 3167 Los Angeles Summit of Le Montaine, north of Big Pines, north side of San Gabriel Mountains 2209 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
  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
  RSA90939  Trifolium fucatum F. W. Peirson 1918-4-28 554 Los Angeles Turnbull Canyon near Whittier, Puente Hills. Comment
  RSA90985  Trifolium wormskioldii F. W. Peirson 1919-6-15 485 Los Angeles Rock Creek. San Gabriel Mtns. 1296 Comment
  RSA91009  Conyza canadensis F. W. Peirson 1921-10-9 5296 Los Angeles Tujunga Canyon, at west end of San Gabriel Mountains. 457 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
  RSA91035  Erigeron foliosus var. foliosus F. W. Peirson 1920-9-15 2285 Los Angeles Pine Mountain, 2 miles N of Mt. San Antonio 2941 Comment
  RSA91107  Trifolium obtusiflorum F. W. Peirson 1919-7-1 485 Los Angeles Fish Canyon, San Gabriel Mts. 305 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
  RSA91128  Trifolium microcephalum F. W. Peirson 1923-5-21 3513 Los Angeles Fish Canyon, San Bernardino Mountains 686 Comment
  RSA91163  Lessingia glandulifera var. glandulifera F. W. Peirson 1928-9-5 8191 Los Angeles road from Rock Creek to Big Pines 1280 Comment
  RSA91200  Lupinus excubitus var. hallii F. W. Peirson 1924-8-23 5052 Los Angeles Above forks of San Gabriel River, [San Gabriel Mountains] 412 Comment
  RSA91204  Lupinus formosus var. formosus F. W. Peirson 1907-7-7 3 Los Angeles pine Flats Comment
  RSA91228  Lupinus formosus var. formosus F. W. Peirson 1924-5-26 4638 Los Angeles Strawberry Peak, Strawberry Peak, San Gabriel Mts 1143 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
  RSA91236  Vicia sativa subsp. nigra F. W. Peirson 1922-5-7 2018 Los Angeles New York Drive at Fair Oaks Reservoir, Altadena. Comment
  RSA91252  Lupinus breweri var. grandiflorus F. W. Peirson 1921-6-16 2441 Los Angeles Summit of Mt. Waterman, San Gabriel Mountains 2317 Comment
  RSA91265  Lupinus longifolius F. W. Peirson 1920-5-14 2147 Los Angeles Lukens Peak, San Gabriel Mts, Los Angeles Count, Alt 3000-3500ft 915 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
  RSA91275  Isocoma menziesii var. vernonioides F. W. Peirson 1924-10-19 5227 Los Angeles Clearwater. 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
  RSA91321  Lupinus longifolius F. W. Peirson 1924-5-24 4620 Los Angeles Topanga 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
Read comments
Oct 21 2014
  RSA91353  Lupinus chamissonis F. W. Peirson 1922-1-5 2664 Los Angeles Hermosa Beach Comment
  RSA91362  Medicago polymorpha F. W. Peirson 1920-4-20 548 Los Angeles 1085 New York Drive, Altadena. Comment
  RSA91363  Medicago lupulina F. W. Peirson 1922-7-7 3191 Los Angeles Ranger's Cabin, Swartout Valley. 1799 Comment
  RSA91366  Melilotus albus F. W. Peirson 1919-3-30 354 Los Angeles Tujunga Canyon. West end of San Gabriel Mts. 427 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
  RSA91500  Trifolium ciliolatum F. W. Peirson 1919-4-19 378 Los Angeles Pacoima Canyon; San Gabriel Mountains Comment
  RSA91504  Trifolium ciliolatum F. W. Peirson 1903-4-9 552 Los Angeles Shorb, Los Angeles County Comment
  RSA91515  Poa secunda F. W. Peirson 1918-04 1550 Los Angeles Arroyo Seco above Devil's Gate, West of Pasadena Comment
  RSA91581  Schoenoplectus maritimus F. W. Peirson 1918-6-16 1617 Los Angeles Small lake south of Palmdale, west Mojave Desert. Comment
  RSA91680  Nassella lepida F. W. Peirson 1918-4-28 1586 Los Angeles Summit of Turnbull Canyon, hills above Whittier Comment
  RSA91690  Bromus diandrus F. W. Peirson 1924-5-27 4621 Los Angeles San Gabriel Mountains. North slope, Strawberry Peak. 1753 Comment
  RSA91695  Gnaphalium palustre F. W. Peirson 1315 Los Angeles Sink at Inglewood. Comment
  RSA91729  Achnatherum coronatum F. W. Peirson 1918-6-10 1583 Los Angeles E trail to Mt Low, San Gabriel Mts 915 Comment
  RSA91731  Achnatherum coronatum F. W. Peirson 1926-4-29 6645 Los Angeles Among shrubs on east side of stream bed, Pacoima Wash, at west end of San Gabriel Mountains 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
  RSA91756  Gnaphalium californicum F. W. Peirson 1925-4-23 5808 Los Angeles San Gabriel River 305 Comment
  RSA91758  Gnaphalium californicum F. W. Peirson 1919-1-26 235 Los Angeles Hills east of Rubio Canyon 548 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
  RSA91824  Nassella cernua F. W. Peirson 1923-4-12 3419 Los Angeles Wilson's Cove, San Clemente Island Comment
  RSA91855  Crypsis vaginiflora F. W. Peirson 1906-7-19 1572 Los Angeles Inglewood. Comment
  RSA91966  Elymus elymoides subsp. californicus F. W. Peirson 1922-7-6 3153 Los Angeles Pleasant View Ridge, San Gabriel Mountains. 2561 Comment
  RSA92042  Bromus grandis F. W. Peirson 1918-5-19 1556 Los Angeles Millard's Canyon, south base of San Gabriel Mts. Comment
  RSA92043  Bromus carinatus F. W. Peirson 1918-4-28 1558 Los Angeles Road east and south of El Monte. Comment
  RSA92044  Bromus hordeaceus F. W. Peirson 1918-04 4198 Los Angeles Altadena. 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
  RSA92074  Micropus californicus F. W. Peirson 1301 Los Angeles Santa Monica, Los Angeles, California 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
Read comments
Oct 7 2010
  RSA92163  Schoenoplectus californicus F. W. Peirson 1918-4-28 1612 Los Angeles Road east and south of El Monte. 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
  RSA92221  Perityle emoryi F. W. Peirson 1951-1 1370 Los Angeles N of Santa Monica 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
  RSA92262  Achyrachaena mollis F. W. Peirson 1918-4-28 2495 Los Angeles Turnbull Canyon near Whittier, Puente Hills. Comment
  RSA92266  Achyrachaena mollis F. W. Peirson 1921-4-10 1363 Los Angeles South base of San Gabriel Mtns. San Dimas Canyon. 426 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
  RSA92284  Layia glandulosa F. W. Peirson 1925-4-23 5803 Los Angeles River bottom, San Gabriel River 396 Comment
  RSA92289  Layia glandulosa F. W. Peirson 1919-3-30 345 Los Angeles Tujunga Canyon, west end of San Gabriel Mountains 427 Comment
  RSA92300  Cyperus virens F. W. Peirson 1918-4-28 1609 Los Angeles Southeast of El Monte. Comment
  RSA92315  Poa secunda var. secunda F. W. Peirson 1918-6-1 2683 Los Angeles Eaton Canyon, south base of San Gabriel Mtns. Comment
  RSA92316  Poa secunda var. secunda F. W. Peirson 1923-5-26 3525 Los Angeles Rock Creek, norht slope of San Gabriel Mountains 1646 Comment
  RSA92321  Poa secunda var. secunda F. W. Peirson 1921-5-3 1549 Los Angeles Bear Canyon Ridge west of Mt. Lowe 1219 Comment
  RSA92322  Poa secunda var. secunda F. W. Peirson 1920-5-9 5366 Los Angeles Summit of Mt. Wilson. 1753 Comment
  RSA92323  Poa secunda var. secunda F. W. Peirson 1918-6-10 5367 Los Angeles Summit of San Gabriel Peak 1860 Comment
  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
  RSA92379  Psilocarphus tenellus F. W. Peirson 1918-5-5 1303 Los Angeles Brents on the Malibu, Santa Monica Mountains. 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
  RSA92397  Eriophyllum pringlei F. W. Peirson 1917-5-12 1386 Los Angeles County public camp ground in Mint Canyon, northwest corner of San Gabriel Mts. 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
  RSA92423  Helianthus gracilentus F. W. Peirson 1921-7-19 2783 Los Angeles San Gabriel Mts: junction of Coldwater Canyon and Cattle Canyon 793 Comment
  RSA92428  Helianthus gracilentus F. W. Peirson s.n. Los Angeles Verdugo Mountains Comment
  RSA92469  Coreopsis californica F. W. Peirson 1930-5-30 8907 Los Angeles 1 miles N of Llano Comment
  RSA92470  Coreopsis californica F. W. Peirson 1932-4-17 9850 Los Angeles Below Lovejoy Dam, Lovejoy Buttes, southwestern Mojave Desert. 762 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
  RSA92542  Salix exigua F. W. Peirson 1932-4-17 9859 Los Angeles Margin of Lovejoy Dam, Lovejoy Buttes, SW Mojave Desert. 762 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
  RSA92633  Monolopia lanceolata F. W. Peirson 1903-3-28 1377 Los Angeles Benedict's Canyon, Santa Monica Mountains. 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
  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
  RSA92655  Eriophyllum confertiflorum var. confertiflorum F. W. Peirson 1919-5-10 409 Los Angeles Arraster [Arrastre] Creek, San Gabriel Mountains. 838 Comment
Read comments
Aug 21 2014
  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
  RSA92702  Salix laevigata F. W. Peirson 1923-5-27 9609 Los Angeles Pallett Creek, north slope of San Gabriel Mountains 1098 Comment
  RSA92715  Salix lucida subsp. lasiandra Mabel Peirson 1925-3-1 9605 Los Angeles Arroyo Seco, west of Pasadena Comment
  RSA92861  Chaenactis santolinoides F. W. Peirson 1928-6-2 7932 Los Angeles S fork of Rock Creek: trail toward the summit. 1982 Comment
  RSA92869  Urtica urens F. W. Peirson 1919-10 1713 Los Angeles weed in Altadena. Comment
  RSA92881  Anemopsis californica F. W. Peirson 1919-6-15 503 Los Angeles Rock Creek, north slope of San Gabriel Mountains. 1296 Comment
  RSA92888  Populus fremontii subsp. fremontii F. W. Peirson 1919-3-30 386 Los Angeles Tujunga Canyon, west end of San Gabriel Mountains. 442 Comment
  RSA92896  Parietaria hespera var. hespera F. W. Peirson 1923-4-12 3466 Los Angeles Wilson's Cove, San Clemente Island. Comment
  RSA92910  Madia elegans subsp. densifolia F. W. Peirson 1920-9-17 2712 Los Angeles San Antonio Canyon, San Gabriel Mountains. 1341 Comment
  RSA92913  Lasthenia gracilis F. W. Peirson 1903-4-4 1375 Los Angeles Ballona, near coast of Los Angeles County Comment
  RSA92921  Lasthenia californica F. W. Peirson 1903-4-11 2748 Los Angeles Laurel Canyon, Santa Monica Mts 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
  RSA93081  Solidago confinis F. W. Peirson 1920-9-12 s.n. Los Angeles Bear Flat to Mt. Baldy trail, San Gabriel Mountains, eastern Los Angeles Co. 1707 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
  RSA93202  Baccharis salicifolia F. W. Peirson 1919-02 353 Los Angeles Rubio Canyon, S side of San Gabriel Mts. 549 Comment
  RSA93206  Baccharis salicifolia F. W. Peirson 1904-9-5 s.n. Los Angeles Verdugo Canyon, Verdugo Mountains 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
  RSA93254  Ericameria cuneata var. cuneata F. W. Peirson 1918-10-10 222 Los Angeles Falls in Rubio Canyon 762 Comment
  RSA93265  Conyza bonariensis F. W. Peirson 1920-6-13 1348 Los Angeles Weed at 1085 New York Drive, Altadena Comment
  RSA93275  Ericameria cooperi F. W. Peirson 1921-5-19 1245 Los Angeles Little Rock Creek 945 Comment
  RSA93291  Corethrogyne filaginifolia var. filaginifolia F. W. Peirson 1918-10-16 270 Los Angeles Pacoima Canyon 518 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
  RSA93345  Xylorhiza tortifolia F. W. Peirson 1926-4-26 6662 Los Angeles 5 miles west of Rock Creek, Mohave Desert. Comment
  RSA93356  Heterotheca fastigiata F. W. Peirson 1918-10-21 1226 Los Angeles West Fork of San Gabriel River. 1067 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
  RSA93387  Symphoricarpos mollis F. W. Peirson 1919-5-18 440 Los Angeles Monrovia Canyon, S base of San Gabriel Mountains 457 Comment
  RSA93679  Filago californica F. W. Peirson 1918-6-4 233 Los Angeles east of Rubio Canyon, south base of San Gabriel Mountains Comment
  RSA93683  Filago californica F. W. Peirson 1921-6-20 5278 Los Angeles West Fork of San Gabriel River. 534 Comment
  RSA93685  Ambrosia psilostachya F. W. Peirson 1919-11-15 1318 Los Angeles East Villa St. near Allen St. Pasadena. 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
  RSA93757  Artemisia spinescens F. W. Peirson 1927-5-7 7262 Los Angeles 3 miles east of Lancaster. Comment
  RSA93783  Aster greatae F. W. Peirson s.n. Los Angeles Benedicts Canyon, Santa Monica Mts Comment
  RSA93784  Aster greatae F. W. Peirson 1918-10-16 274 Los Angeles Pacoima Canyon, west end of San Gabriel Mts. 534 Comment
  RSA93785  Symphyotrichum greatae F. W. Peirson 1924-8-23 5053 Los Angeles Just above the mouth of the West Fork of the San Gabriel River 427 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
  RSA93861  Encelia californica F. W. Peirson 1919-2-16 1335 Los Angeles Point Fermin. Comment
  RSA93903  Encelia actoni F. W. Peirson 1919-6-13 484 Los Angeles Large colony on south side of canyon of Rock Creek. 1296 Comment
  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
  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
  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
  RSA94067  Hemizonia fasciculata F. W. Peirson 1906-7-16 1354 Los Angeles Los Angeles River, San Fernando Valley Comment
  RSA94119  Brickellia californica F. W. Peirson 1918-9-7 221 Los Angeles Upper end of Eaton Canyon 1524 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
  RSA94194  Artemisia ludoviciana subsp. ludoviciana F. W. Peirson 1923-9-1 4028 Los Angeles San Gabriel Mountains 2011 Comment
  RSA94373  Madia exigua F. W. Peirson 1921-6-21 2446 Los Angeles West Fork of San Gabriel River 610 Comment
  RSA94394  Chaenactis fremontii F. W. Peirson 1921-5-19 2409 Los Angeles Little Rock Creek: N slope of San Gabriel Mountains 960 Comment
  RSA94398  Chaenactis xantiana F. W. Peirson 1922-7-5 3163 Los Angeles Summit of Le Montaine, north of Big Pines, north side of San Gabriel Mountains 2209 Comment
  RSA94404  Artemisia douglasiana F. W. Peirson 1918-9-15 246 Los Angeles lower part of trail up Lukens Peak 762 Comment
  RSA94405  Artemisia douglasiana F. W. Peirson 1924-10-26 5265 Los Angeles Arroyo Seco below California Street bridge, Pasadena 198 Comment
  RSA94427  Matricaria matricarioides F. W. Peirson 1920-4-20 2104 Los Angeles 1085 New York Drive, Altadena. Comment
  RSA94530  Artemisia californica F. W. Peirson 1918-10-16 245 Los Angeles Pacoima Canyon, west end of San Gabriel Mts. 534 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
  RSA94601  Anisocoma acaulis F. W. Peirson 1923-5-27 4316 Los Angeles Pallett Creek, tributary to Rock Creek, north slope of San Gabriel Mts. 1097 Comment
  RSA94609  Syntrichopappus fremontii F. W. Peirson 1917-5-13 1379 Los Angeles Near Little Rock, Mojave Desert. Comment
  RSA94610  Syntrichopappus fremontii F. W. Peirson 1921-5-20 4746 Los Angeles Little Rock Creek, N slope of San Gabriel Mtns. 976 Comment
  RSA94617  Venegasia carpesioides F. W. Peirson 1924-5-24 4619 Los Angeles Topanga Canyon 91 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
  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
  RSA94707  Senecio astephanus F. W. Peirson 1920-6-10 1432 Los Angeles trail east of Inspiration Point, Mt. Lowe 1371 Comment
  RSA94708  Senecio astephanus F. W. Peirson 4312 Los Angeles upper part of Mt. Wilson trail (now toll road) 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
  RSA94818  Hypochaeris glabra F. W. Peirson 1919-05 2766 Los Angeles At 1085 New York Drive, Altadena Comment
  RSA94821  Hypochaeris radicata F. W. Peirson 1920-6-13 2136 Los Angeles Colorado Street, Pasadena Comment
  RSA94825  Cnicus benedictus F. W. Peirson 1935-3-31 11457 Los Angeles Mendocino Street and Holliston Ave, Altadena Comment
  RSA94828  Silybum marianum F. W. Peirson 2134 Los Angeles Laurel Canyon, Santa Monica Mts. 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
  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
  RSA94957  Malacothrix clevelandii F. W. Peirson 1919-5-21 445 Los Angeles Arroyo Seco Canyon, near Pasadena 685 Comment
  RSA94959  Malacothrix clevelandii F. W. Peirson 1923-5-21 5288 Los Angeles South face of San Gabriel Mountains. Fish Canyon 792 Comment
  RSA94965  Malacothrix glabrata F. W. Peirson 1921-6-20 2149 -a Los Angeles North Fork of San Gabriel River 762 Comment
  RSA94981  Stephanomeria spinosa F. W. Peirson 1923-8-31 4007 Los Angeles summit of Blue ridge, 3 miles east of Big Pines, Swartout Valley 2529 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
  RSA95030  Malacothrix foliosa F. W. Peirson 1923-4-12 3463 Los Angeles Wilson's Cove, San Clemente Island. Comment
  RSA95032  Lepidospartum squamatum F. W. Peirson 1924-10-26 5266 Los Angeles Below California Street bridge, Arroyo Seco, Pasadena 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
  RSA95047  Hemizonia parryi subsp. australis F. W. Peirson 1920-6-22 1352 Los Angeles Along Valley Boulevard at Bassett Comment
  RSA95048  Sonchus oleraceus F. W. Peirson 1920-4-22 s.n. Los Angeles At 1085 New York Drive, Altadena. 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
  RSA95065  Hemizonia pungens F. W. Peirson 1919-8-30 1351 Los Angeles Desert between Mojave and Lancaster. Comment
  RSA95081  Microseris douglasii subsp. platycarpha F. W. Peirson 1908-4-18 1464 Los Angeles Point Fermin. Comment
  RSA95086  Microseris douglasii subsp. tenella F. W. Peirson 1918-5-5 1466 Los Angeles Road from Brents on the Malibu, Santa Monica Mountains Comment
  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
  RSA95125  Agoseris grandiflora var. grandiflora F. W. Peirson 1923-5-21 3519 Los Angeles South face of San Gabriel Mountains. Fish Canyon 792 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
  RSA95178  Hieracium argutum F. W. Peirson 1921-7-16 2502 Los Angeles East fork of San Gabriel River. 1372 Comment
  RSA95180  Hieracium argutum F. W. Peirson 1918-8-6 258 Los Angeles Trail to Sierra Madre; San Gabriel Mts. 823 Comment
  RSA95183  Anisocoma acaulis F. W. Peirson 1921-5-19 1468 Los Angeles Little Rock Creek: north base of San Gabriel Mountains 1037 Comment
  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
  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
  RSA95251  Taraxacum officinale F. W. Peirson 1924-5-27 4679 Los Angeles Colby's Ranch 975 Comment
  RSA95281  Rhamnus tomentella subsp. cuspidata F. W. Peirson 1921-7-17 4308 Los Angeles Prairie Fork of San Gabriel River, San Gabriel Mountains. 2012 Comment
  RSA95286  Frangula californica subsp. cuspidata F. W. Peirson 1921-5-20 4442 Los Angeles Little Rock Creek, San Gabriel Mts. 976 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
  RSA95310  Rhamnus crocea F. W. Peirson 1920-4-26 216 Los Angeles Santa Anita Wash, S base of San Gabriel Mts. 213 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
  RSA95346  Ceanothus oliganthus var. oliganthus F. W. Peirson, Ruth Conrad 1926-3-20 6513 Los Angeles Arroyo Seco. 1006 Comment
  RSA95348  Ceanothus oliganthus var. oliganthus F. W. Peirson 1918-6-30 113 Los Angeles Eaton Canyon, south face of San Gabriel Mts. Fruiting branch from 4400 feet on Mt. Wilson Trail. 1341 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
  RSA95386  Sidalcea malviflora subsp. sparsifolia F. W. Peirson 1951-2-26 2064 Los Angeles Inglewood 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
  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
  RSA97246  Lomatium vaginatum F. W. Peirson 1926-4-26 6647 Los Angeles Summit of Mint Canyon Grade, northwest part of San Gabriel Mts. Comment
  RSA97256  Lomatium vaginatum F. W. Peirson 1922-6-3 3078 Los Angeles north slope at foot of Oak Grove Canyon, Mojave Desert. 976 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
  RSA97318  Lomatium lucidum F. W. Peirson 1919-5-18 801 Los Angeles trail from Monrovia Canyon to Fish Canyon 915 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
  RSA97352  Cercocarpus betuloides F. W. Peirson 1923-4-9 3429 Los Angeles San Clemente Island, about 2 miles southwest of Wilson's Cove. Comment
  RSA97353  Sanicula arguta F. W. Peirson 1919-3-27 336 Los Angeles Foot of trail to Lukens Peak 609 Comment
  RSA97360  Bowlesia incana F. W. Peirson 1951-4-2 816 Los Angeles Elysian Park. Comment
  RSA97368  Sanicula crassicaulis F. W. Peirson 1920-5-6 2313 Los Angeles South base of San Gabriel Mountains, Fish Canyon. 762 Comment
  RSA97372  Sanicula tuberosa F. W. Peirson 1920-6-10 2796 Los Angeles below Inspiration Point, Mt. Lowe 1341 Comment
  RSA97374  Sanicula tuberosa F. W. Peirson 1908-05 422 Los Angeles South base of the San Gabriel Mountains, Eaton Canyon. Comment
  RSA97376  Sanicula bipinnatifida F. W. Peirson 1918-4-28 812 Los Angeles Turnbull Canyon near Whittier, Puente Hills. Comment
  RSA97379  Sanicula bipinnata F. W. Peirson 2795 Los Angeles Santa Monica, Los Angeles. Comment
  RSA97382  Lomatium nevadense var. parishii F. W. Peirson 1919-6-14 473 Los Angeles Rock Creek, north slope of San Gabriel Mountains 1707 Comment
  RSA97392  Osmorhiza brachypoda F. W. Peirson 1919-5-21 451 Los Angeles Arroyo Seco Canyon, near Pasadena. 610 Comment
  RSA97397  Apiastrum angustifolium F. W. Peirson 1908-4-18 2095 Los Angeles Point Fermin 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
  RSA97413  Tauschia parishii F. W. Peirson 1908-05 136 Los Angeles summit of Mt. Lowe Comment
  RSA97415  Tauschia parishii F. W. Peirson 1926-4-27 6670 Los Angeles San Gabriel Mountains. North side of San Gabriel Mountains, Rock Creek. 1296 Comment
  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
  RSA97440  Phoradendron densum F. W. Peirson 1919-5-10 4682 Los Angeles Arrastre, San Gabriel Mountains 854 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
  RSA97463  Perideridia parishii subsp. latifolia F. W. Peirson 817 Los Angeles Laurel Canyon, Santa Monica Mts. 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
  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
  SEINET10464383  Githopsis diffusa subsp. diffusa Frank W. Peirson 1921-6-13 Peirson 1208 Los Angeles San Gabriel Mountains; Big Santa Anita Trail, 1.5 miles below Sturdenvant's Camp 1067 Comment
  SEINET10840483  Heterocodon rariflorum Frank W. Peirson 1921-6-14 Peirson 1210 Los Angeles TRAIL FORK OF SAN GABRIEL RIVER Comment
  SEINET10939154  Nemacladus sigmoideus Frank W. Peirson 1927-5-7 Peirson 7265 Los Angeles 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
  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
  UCD53222  Arctostaphylos patula F. W. Peirson 1918-6-17 143 Los Angeles Summit of North 'Baldy'; San Gabriel Mountains. Comment



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