Search Results — 1097 specimen records retrieved (821 records with coordinates)
Results for search: County=RIVERSIDE; Source=All; Collector=Peirson;   
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 Please cite data retrieved from this page: Data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/consortium/).
 Records are made available under the CCH Data Use Terms.

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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  CAS-BOT-BC101306  Corethrogyne filaginifolia Frank W. Peirson 1924-7-28 5017 Riverside Pine Flats Camp, San Jacinto Mts. 1798 Comment
  CAS-BOT-BC103904  Salix exigua Frank W. Peirson 1933-4-15 10650 Riverside Whitewater River, 4 1/2 miles above the bridge 701 Comment
  CAS-BOT-BC106225  Brickellia desertorum F. W. Peirson 1920-12-29 2336 Riverside Andreas Canyon, Colorado Desert 243 Comment
  CAS-BOT-BC106344  Brickellia atractyloides var. arguta Frank W. Peirson 1928-4-24 7900 Riverside Cottonwood Spring Comment
  CAS-BOT-BC109457  Sidotheca caryophylloides Frank W. Peirson 1924-7-29 5019 Riverside San Jacinto Mountains. Banning-Idlewild Road. 1767 Comment
  CAS-BOT-BC117867  Carex sartwelliana Frank Warrington Peirson 1924-7-28 5015 Riverside Near stream, Pine Flats Camp, San Jacinto Mts. 1798 Comment
  CAS-BOT-BC128448  Salix lasiolepis var. lasiolepis Frank W. Peirson 1933-4-13 10646 Riverside Road from Deep Canyon to Idlewild at the Palm Creek crossing. 1356 Comment
  CAS-BOT-BC128450  Salix lasiolepis var. lasiolepis Frank W. Peirson 1933-4-14 10648 Riverside Banning - Idlewild Road 1524 Comment
  CAS-BOT-BC131424  Encelia frutescens Frank W. Peirson 1922-4-12 s.n. Riverside 30 miles south of Coachella Comment
  CAS-BOT-BC137649  Aristida adscensionis Frank W. Peirson 1921-3-23 2374 Riverside Colorado Desert. Deep Canyon. 335 Comment
  CAS-BOT-BC144850  Potentilla rimicola Frank W. Peirson 1924-7-27 5000 Riverside 1/2 mile west of Deer Spring, San Jacinto Mts. Comment
  CAS-BOT-BC171743  Epilobium canum subsp. latifolium F. W. Peirson 1922-12-27 3336 Riverside Andreas Canyon between forks and at North Fork, where trail branch comes down, Colorado Desert Comment
  CAS-BOT-BC181570  Crossosoma bigelovii Frank W. Peirson 1922-4-9 s.n. Riverside Andreas Canyon - Colorado Desert 457 Comment
  CAS-BOT-BC191257  Chorizanthe fimbriata var. fimbriata Frank W. Peirson 1922-5-19 3024 Riverside 3 miles NE of Murietta Comment
  CAS-BOT-BC191854  Chorizanthe corrugata Frank W. Peirson 1927-4-12 7175 Riverside Painted Canyon, near camp at forks Comment
  CAS-BOT-BC195675  Distichlis spicata Frank W. Peirson 1922-4-9 4331 Riverside Murray Canyon, Colorado Desert Comment
  CAS-BOT-BC195677  Distichlis spicata Frank W. Peirson 1922-4-29 4541 Riverside South of Lake Elsinore Comment
  CAS-BOT-BC198169  Deschampsia danthonioides Frank W. Peirson 1922-5-19 3022 Riverside 10 mi. NE of Murietta along roadside, Menifee Valley Comment
  CAS-BOT-BC198170  Deschampsia danthonioides Frank W. Peirson 1922-5-19 3022 Riverside Menifee Valley Comment
  CAS-BOT-BC202502  Argythamnia serrata F. W. Peirson 1922-12-28 4437 Riverside Andreas Canyon, Colorado Desert 243 Comment
  CAS-BOT-BC202569  Tetracoccus hallii Frank W. Peirson 1928-4-24 7894 Riverside Cottonwood Spring Comment
  CAS-BOT-BC207047  Bernardia incana Frank W. Peirson 1928-4-25 7917 Riverside Cottonwood Spring Comment
  CAS-BOT-BC207130  Argythamnia lanceolata F. W. Peirson 1921-3-23 2805 Riverside Deep Canyon Wash, 12 miles southeast of Palm Springs, Colorado Desert 152 Comment
  CAS-BOT-BC213221  Ayenia compacta Frank W. Peirson 1922-4-9 9600 Riverside Andreas Canyon, Palm Springs Region 457 Comment
  CAS-BOT-BC221307  Calystegia macrostegia subsp. intermedia Frank W. Peirson 1929-5-4 8333 Riverside Lake Elsinore Comment
  CAS-BOT-BC227046  Leptosiphon floribundus subsp. glaber Frank W. Peirson 1922-4-28 946 Riverside Leach Canon [Canyon], Elsinore Region Comment
  CAS-BOT-BC227049  Leptosiphon floribundus subsp. glaber Frank W. Peirson 1922-4-28 946 Riverside Leach Canon [Canyon], Elsinore Region Comment
  CAS-BOT-BC231785  Chilopsis linearis Frank W. Peirson 1921-4-13 1173 Riverside Foot of Deep Canyon 304 Comment
  CAS-BOT-BC246240  Chorizanthe rigida Frank W. Peirson 1922-4-11 2863 Riverside Deep Canyon Wash, 12 miles southeast of Palm Springs 243 Comment
  CAS-BOT-BC249896  Eriogonum fasciculatum var. flavoviride Frank W. Peirson 1928-4-24 7907 Riverside Cottonwood Spring Comment
  CAS-BOT-BC250139  Eriogonum fasciculatum var. polifolium Frank W. Peirson 1919-4-14 1759 Riverside Murray Canon [Canyon], Colorado Desert Comment
  CAS-BOT-BC255667  Poa bigelovii F. W. Peirson 1921-3-22 2392 Riverside Murray Canyon, Palm Springs Region, Colorado Desert 457 Comment
  CAS-BOT-BC261783  Eriogonum wrightii var. nodosum Frank W. Peirson 1922-12-27 3333 Riverside Andreas, between Forks, East slope San Jacinto Comment
  CAS-BOT-BC263508  Eriogonum thomasii Frank W. Peirson 1927-4-12 7171 Riverside Foot of canyon, Painted Canyon Comment
  CAS-BOT-BC263518  Eriogonum thomasii Frank W. Peirson 1926-1-31 6490 Riverside Abundant at Dos Palmas, Colorado Desert Comment
  CAS-BOT-BC263519  Eriogonum thomasii Frank W. Peirson 1927-4-12 7171 Riverside Painted Canyon Comment
  CAS-BOT-BC268189  Eriogonum umbellatum var. munzii Frank W. Peirson 1924-7-28 5014 Riverside Pine Flats Camp, San Jacinto Mts. 1798 Comment
  CAS-BOT-BC287641  Ericameria linearifolia Frank W. Peirson 1921-3-21 2380 Riverside Gordon Trail, E slope San Jacinto Mts 914 Comment
  CAS-BOT-BC298482  Eriophyllum ambiguum var. paleaceum F. W. Peirson 1920-2-16 1387 Riverside Below Murray Canyon, Palm Springs region 274 Comment
  CAS-BOT-BC299541  Ericameria paniculata Frank W. Peirson 1922-12-26 3331 Riverside Cabazon old road, Colorado Desert Comment
  CAS-BOT-BC301784  Eriophyllum multicaule Frank W. Peirson 1922-4-29 2927 Riverside Road to Leach Canon [Canyon], Elsinore Comment
  CAS-BOT-BC301791  Eriophyllum multicaule Frank W. Peirson 1922-4-29 2927 Riverside Road to Leach Canyon, about 1 mile north of Lake Elsinore Comment
  CAS-BOT-BC303585  Geraea canescens Frank W. Peirson 1921-3-23 2782 Riverside 10 miles SE of Palm Springs Comment
  CAS-BOT-BC307397  Gnaphalium palustre F. W. Peirson 1930-5-10 8769 Riverside Hemet Plateau, near March Field road from Riverside to Perris 457 Comment
  CAS-BOT-BC30905  Acamptopappus sphaerocephalus Frank W. Peirson 1927-4-11 7154 Riverside Colorado Desert, 0.5 mile below Whitewater Bridge Comment
  CAS-BOT-BC312587  Hulsea vestita subsp. callicarpha Frank W. Peirson 1924-7-27 5005 Riverside Near Deer Spring, San Jacinto Mts. 2590 Comment
  CAS-BOT-BC326834  Peucephyllum schottii Frank W. Peirson 1919-4-13 4737 Riverside 1st canyon east of Palm Canyon, Colorado Desert Comment
  CAS-BOT-BC330345  Pentachaeta aurea F. W. Peirson 1922-5-19 3037 Riverside Road along San Jacinto River, San Jacinto Mts. 1143 Comment
  CAS-BOT-BC330346  Pentachaeta aurea F. W. Peirson 1938-5-30 s.n. Riverside Slopes S of the Shell Gas Station; Thomas Mountain, Hemet Valley 1402 Comment
  CAS-BOT-BC338933  Lasthenia californica F. W. Peirson 1922-4-29 4520 Riverside Lake Elsinore 374 Comment
  CAS-BOT-BC342257  Logfia filaginoides F. W. Peirson 1921-3-22 5277 Riverside Murray Canyon near Palm Springs 487 Comment
  CAS-BOT-BC349790  Monoptilon bellioides F. W. Peirson 1920-2-15 1383 Riverside Near Palm Springs, Coachella Valley Comment
  CAS-BOT-BC349791  Monoptilon bellioides F. W. Peirson 1926-1-31 6491 Riverside Dos Palmas, northern Colorado Desert Comment
  CAS-BOT-BC355863  Pectis papposa var. papposa Frank W. Peirson 1938-11-12 12636 Riverside Imperial Valley Boulevard, about sea level Comment
  CAS-BOT-BC361118  Lasthenia microglossa Peirson 1919-4-14 s.n. Riverside Murray Canon 487 Comment
  CAS-BOT-BC367545  Lasthenia microglossa F. W. Peirson 1919-4-14 1376 Riverside Murray Canyon near Palm Springs 487 Comment
  CAS-BOT-BC376036  Stylocline gnaphaloides Frank W. Peirson 1930-5-10 8775 Riverside Summit of St. Johns Grade south of Hemet 762 Comment
  CAS-BOT-BC379634  Layia platyglossa Frank W. Peirson 1922-5-19 3042 Riverside Hemet Valley; San Jacinto Mts. 1341 Comment
  CAS-BOT-BC381978  Uropappus lindleyi F. W. Peirson 1921-3-22 2381 Riverside Murray Canyon at east base of Mt. San Jacinto 457 Comment
  CAS-BOT-BC390553  Spergularia platensis Frank W. Peirson 1922-4-29 2926 Riverside South of Lake Elsinore Comment
  CAS-BOT-BC407621  Gilia ochroleuca subsp. exilis Frank W. Peirson 1919-4-15 921 Riverside Whitewater Grade above Cabazon Comment
  CAS-BOT-BC407622  Gilia ochroleuca subsp. exilis Frank W. Peirson 1928-3-24 7725 Riverside Temescal Canyon, near auto camp 304 Comment
  CAS-BOT-BC407623  Gilia ochroleuca subsp. exilis Frank W. Peirson 1938-5-30 12413 Riverside South of the Shell Gas station, Thomas Mountain, Hemet Valley Comment
  CAS-BOT-BC419623  Eschscholzia parishii Frank W. Peirson 1928-4-23 7888 Riverside 2 1/2 miles below Cottonwood Spring, (direct road) Comment
  CAS-BOT-BC419624  Eschscholzia parishii Frank W. Peirson 1927-4-12 7167 Riverside Painted Canyon. At the Forks Comment
  CAS-BOT-BC419651  Eschscholzia parishii Frank W. Peirson 1926-2-22 s.n. Riverside Thousand Palm Canyon near Indio Comment
  CAS-BOT-BC432279  Lithophragma affine Frank W. Peirson 1922-5-19 4189 Riverside San Jacinto River 1143 Comment
  CAS-BOT-BC46154  Agoseris heterophylla F. W. Peirson 1922-5-20 3045 Riverside Hemet Valley, San Jacinto Mts. 1371 Comment
  CAS-BOT-BC60106  Lepidium virginicum var. menziesii Frank W. Peirson 1922-5-21 3031 Riverside San Jacinto Mountains. Hemet Valley. 1356 Comment
  CAS-BOT-BC68029  Cryptogramma acrostichoides F. W. Peirson 1921-8-14 2557 Riverside Sierra Nevada - Triple Falls, Cartridge Creek 2438 Comment
  CAS-BOT-BC70037  Cheilanthes covillei Frank W. Peirson 1922-4-10 s.n. Riverside Murray Canyon, Palm Springs Region 457 Comment
  CAS-BOT-BC83346  Myosurus minimus Frank W. Peirson 1922-4-29 2945 Riverside South of Lake Elsinore. 374 Comment
  CAS-BOT-BC83347  Myosurus minimus Frank W. Peirson 1922-5-20 3035 Riverside About 1 mile belwo Kenworthy. Hemet Valley, San Jacinto Mountains. 1386 Comment
  CAS-BOT-BC83348  Myosurus minimus Frank W. Peirson 1922-5-19 4171 Riverside Menifee Valley. Comment
  CAS-BOT-BC83349  Myosurus minimus Frank W. Peirson 1922-5-19 4171 Riverside Menifee Valley. Comment
  CAS-BOT-BC90197  Artemisia californica Frank W. Peirson 1922-12-27 3338 Riverside between the forks, Andreas Canyon, Palm Springs region, Colorado Desert 609 Comment
  CAS-BOT-BC91880  Platystemon californicus Frank W. Peirson 1922-4-28 5325 Riverside Temescal Canyon. 274 Comment
  CAS-BOT-BC92822  Clematis pauciflora Frank W. Peirson 1921-3-22 2372 Riverside Murray Canyon. 426 Comment
  CAS-BOT-BC9454  Mimulus diffusus Frank Warrington Peirson 1922-4-30 2934 Riverside Hills south of Tuscalota Creek, Aguanga to Hemet Road Comment
  CAS-BOT-BC95419  Bowlesia incana F. W. Peirson 1922-4-30 2954 Riverside about 1.5 mi.es from Temecula River on Hemet Road, Lancaster Valley 518 Comment
  JEPS1237  Tricardia watsonii Frank W. Peirson 1918-1 5 Riverside Whitewater; San Gorgonio Pass Comment
  JEPS13477  Deinandra kelloggii Frank W. Peirson 1925-5-20 6011 Riverside Aguanga Comment
  JEPS18058  Orcuttia californica Frank W. Peirson 1922-5-19 3020 Riverside Menifee Valley Comment
  JEPS3007  Mimulus palmeri Frank W. Peirson 1929-5-4 Riverside summit St. John's Grade 792 Comment
  JEPS35729  Eriogonum deflexum var. deflexum Frank W. Peirson 1928-11-30 Riverside foot of canyon below Shavers Well 0 Comment
  JEPS41248  Petalonyx linearis F. W. Peirson 1921-3-23 2376 Riverside Deep Canyon; Colorado Desert 335 Comment
  JEPS4196  Stemodia durantifolia F. W. Peirson 1919-4-14 Riverside Palm Springs, foot of Murray Canyon; Mt. San Jacinto Comment
  JEPS4469  Stemodia durantifolia F. W. Peirson 1919-4-14 Riverside Mount San Jacinto, Palm Springs, foot of Murray Canyon Murray Canyon; Mount San Jacinto, Palm Springs Region, Murray Canyon Comment
  JEPS45139 Image available Amelanchier utahensis F. W. Peirson 1922-5-20 3057 Riverside Hemet Valley; San Jacinto Mts. 1371 Comment
  JEPS47552  Allium marvinii Frank W. Peirson 1921-3-19 2394 Riverside 4 mi w Beaumont Comment
  JEPS47607  Allium cratericola Frank W. Peirson 1922-5-21 3069 Riverside small side canyon, on e side of Hemet Valley San Jacinto Mts., Hemet Valley 1371 Comment
  JEPS49608  Philadelphus microphyllus var. stramineus Frank W. Peirson 1924-7-27 4991 Riverside Dark Canyon, Mt. San Jacinto. 2286 Comment
  JEPS54762  Astragalus nuttallianus F. W. Peirson 1922-4-9 584 Riverside foot of Murray Canyon e base Mt. San Jacinto, Palm Sprs, Murray Canyon (Palm Sprs., e base Mt. San Jacinto) Comment
  JEPS54817  Astragalus pachypus var. jaegeri Frank W. Peirson 1928-3-24 Riverside Temecula River Road s Dripping Spring; Temecula River Road s of Dripping Spring 457 Comment
  JEPS57788  Chorizanthe leptotheca Frank W. Peirson 1925-5-20 6012 Riverside Aguanga Comment
  JEPS57953  Nemacaulis denudata var. gracilis Frank W. Peirson 1917-1 6 Riverside road se Palm Springs Comment
  JEPS59863  Salsola tragus Frank W. Peirson 1918-1 7 Riverside e. base Mt. San Jacinto, Andreas Canyon Comment
  JEPS67559  Cryptantha decipiens F. W. Peirson 1921-3-21 2368 a Riverside above Andreas Canyon (Gordon trail) 1066 Comment
  JEPS7671  Nemacladus rubescens Frank W. Peirson 1926-1-31 6486 Riverside about 2 mi from station on Mecca Road, Dos Palmas; Colorado Desert, Dos Palmas Comment
  LA38933  Mimulus guttatus Frank W. Peirson; 1922-4-8 4720 Riverside Murray Canyon, Palm Springs. In lower part of canyon Comment
  LA38961  Mimulus palmeri Frank W. Peirson; 1922-4-30 2934 Riverside below summit of St. Johns Grade 761 Comment
  LA95899  Mimulus rattanii Frank W. Peirson; 1931-5-30 9379 Riverside Santiago Peak, Glen Ivy Trail 1219 Comment
Read comments
Sep 20 2019
  PASA1050  Lathyrus alefeldii Frank W. Peirson 1922-4-28 Riverside Leach canyon, Elsinore Region 548 Comment
  PASA1079  Lotus davidsonii Frank W. Peirson 1924-7-27 Riverside Dark Canyon, San Jacinto Mts. 2224 Comment
  PASA1086  Lotus grandiflorus Frank W. Peirson 1924-7-27 Riverside Dark Canyon, San Jacinto Mts. 1706 Comment
  PASA1115  Lotus subpinnatus Frank W. Peirson 1930-5-10 Riverside Hemet Plateau near March Field 457 Comment
  PASA1116  Lotus subpinnatus Frank W. Peirson 1930-5-10 Riverside Hemet Plateau, along boulevard opposite March field 457 Comment
  PASA1119  Lotus tomentellus Frank W. Peirson 1927-4-12 Riverside Painted Canyon, Colorado Desert Comment
  PASA1143  Monardella macrantha var. longiloba Frank W. Peirson 1924-7-27 Riverside Dark Canyon, San Jacinto Mts. 2224 Comment
  PASA1246  Poa bigelovii Frank W. Peirson 1921-3-22 Riverside Murray Canyon 457 Comment
  PASA1248  Orcuttia californica Frank W. Peirson 1922-5-19 Riverside Manfee Valley 426 Comment
  PASA127  Mimulus latidens Frank W. Peirson 1922-5-19 Riverside Menifee Valley 426 Comment
  PASA1350  Peucephyllum schottii Frank W. Peirson 1930-5-29 Riverside Painted Canyon Comment
  PASA1563  Lasthenia glabrata var. coulteri Frank W. Peirson 1922-4-29 Riverside Lake Elsinore 374 Comment
  PASA1624  Platystemon californicus Frank W. Peirson 1922-4-29 Riverside Field south of Lake Elsinore 377 Comment
  PASA166  Pedicularis densiflora Frank W. Peirson 1922-4-29 Riverside 1 mile east of Dripping Spring, Temecula river 518 Comment
  PASA1886  Boisduvalia glabella Frank W. Peirson 1922-5-19 Riverside Menifee Valley 426 Comment
  PASA1890  Epilobium adenocaulon Frank W. Peirson 1924-7-28 Riverside Pine Flats Camp, San Jacinto Mts. 1798 Comment
  PASA1894  Epilobium glaberrimum Frank W. Peirson 1924-7-28 Riverside Pine Flats Camp. San Jacinto Mts. 1798 Comment
  PASA1957  Pectocarya setosa Frank W. Peirson 1921-3-21 Riverside Gordon Trail, east slope San Jacinto Mt. 1066 Comment
  PASA1968  Harpagonella palmeri Frank W. Peirson 1922-5-19 Riverside 2 _ miles from Murietta on the road to Perris Comment
  PASA1998  Amsinckia douglasiana Frank W. Peirson 1921-3-22 Riverside Murray Canyon, Palm Springs Region 396 Comment
  PASA2160  Brickellia arguta Frank W. Peirson 1919-4-13 Riverside Along the Tahquitz stream, east of Palm Springs 152 Comment
  PASA2170  Hofmeisteria pluriseta Frank W. Peirson 1927-4-12 Riverside Painted Canyon Comment
  PASA2173  Baeria aristata Frank W. Peirson 1922-5-19 Riverside 5 miles northeast of Murietta 457 Comment
  PASA2175  Baeria chrysostoma var. gracilis Frank W. Peirson 1922-4-29 Riverside Lake Elsinore 374 Comment
  PASA2179  Baeria microglossa Frank W. Peirson 1919-4-14 Riverside Murray Canyon Comment
  PASA2215  Eriophyllum multicaule Frank W. Peirson 1928-4-19 Riverside Hills north of Elsinore 457 Comment
  PASA2297  Psilocarphus globiferus Frank W. Peirson 1922-4-29 Riverside Lake Elsinore 380 Comment
  PASA2318  Layia platyglossa Frank W. Peirson 1919-4-15 Riverside Whitewater Grade near Cabazon 548 Comment
  PASA2335  Trixis californica Frank W. Peirson 1919-4-14 Riverside Murray Canyon, Palm Springs Region Comment
  PASA2373  Euonymus parishii Frank W. Peirson 1924-7-27 Riverside Dark Canyon, San Jacinto Mts. 1767 Comment
  PASA2404  Ceanothus greggii var. perplexans Frank W. Peirson 1932-5-20 Riverside Hemet Valley, San Jacinto Mts. 1447 Comment
  PASA247  Trifolium stenophyllum Frank W. Peirson 1922-4-29 Riverside Lake Elsinore 380 Comment
  PASA2513  Ceanothus sorediatus Frank W. Peirson 1931-5-30 Riverside Santiago Peak 1219 Comment
  PASA2519  Ceanothus tomentosus Frank W. Peirson 1922-4-30 Riverside St John's Grade, bautista Creek 761 Comment
  PASA2553  Delphinium parryi Frank W. Peirson 1922-5-18 3051 Riverside Road south of Lake Elsinore 377 Comment
  PASA2571  Myosurus aristatus Frank W. Peirson 1922-5-20 3035 Riverside Helmet Valley, San Jacinto Mtns. 1386 Comment
  PASA2572  Myosurus minimus Frank W. Peirson 1922-4-29 2945 Riverside Lake Elsinore Comment
  PASA2659  Arabis holboellii var. fendleri Frank W. Peirson 1922-4-10 2869 Riverside Murray Canyon, Palm Springs Region 609 Comment
  PASA2723  Astragalus douglasii var. parishii Frank W. Peirson 1922-5-20 3342 Riverside Hemet Valley, San Jacinto Mtns. 1371 Comment
  PASA2724  Astragalus douglasii var. parishii Frank W. Peirson 1922-4-29 2955 Riverside Aguanga 609 Comment
  PASA2744  Astragalus pachypus var. jaegeri Frank W. Peirson 1922-4-29 2950 Riverside 1 mile south of Dripping Spring, Temecula River 518 Comment
  PASA2745  Astragalus pomonensis Frank W. Peirson 1920-6-6 7696 Riverside Dripping Spring, Temecula River 457 Comment
  PASA299  Specularia biflora Frank W. Peirson 1926-5-2 Riverside Grade north of Dripping Spring, Temecula River 426 Comment
  PASA303  Downingia immaculata Frank W. Peirson 1922-4-29 Riverside Field south of Lake Elsinore 380 Comment
  PASA307  Nemacladus rigidus Frank W. Peirson 1928-4-24 Riverside Cottonwood Spring, 1/2 mile below spring in broad sandy wash Comment
Read comments
Jun 24 2016
  PASA330  Microseris douglasii Frank W. Peirson 1922-4-30 Riverside 1 mile west of Lakeview 426 Comment
  PASA352  Uropappus lindleyi Frank W. Peirson 1922-4-29 Riverside South of Lake Elsinore 380 Comment
  PASA395  Capsella elliptica Frank W. Peirson 1921-4-11 Riverside Murray Canyon, Palm Springs Region Comment
  PASA508  Brodiaea synandra Frank W. Peirson 1922-5-19 Riverside 2 miles southeast of Perris Comment
  PASA617  Cyperus laevigatus Frank W. Peirson 1924-12-30 Riverside Thousand Palms Canyon 121 Comment
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Jun 24 2016
  PASA627  Juncus canaliculatus Frank W. Peirson 1924-7-28 Riverside Pine Flats Camp, San Jacinto Mts. 1798 Comment
  PASA628  Juncus bufonius Frank W. Peirson 1922-4-29 Riverside South side Lake Elsinore Comment
  PASA673  Geranium carolinianum Frank W. Peirson 1922-4-10 Riverside Murray Canyon 304 Comment
  PASA686  Linum micranthum Frank W. Peirson 1922-5-19 Riverside Two and one-half miles northeast of Murietta on the Menifee Valley Raod Comment
  PASA822  Lupinus concinnus Frank W. Peirson 1922-5-19 Riverside Road to Keen's Camp, San Jacinto Mts. Comment
  PASA833  Dicoria canescens Frank W. Peirson 1920-12-29 Riverside One and one-half miles east of Thite-water 304 Comment
Read comments
Nov 12 2014
  PASA881  Penstemon linarioides var. californicus Frank W. Peirson 1922-5-21 Riverside Hamet Valley, San Jacinto Mts. 1371 Comment
  PASA949  Senecio monoensis Frank W. Peirson 1928-4-23 Riverside 2 1/2 miles below Cottonwood Spring Comment
  PASA959  Tetradymia comosa Frank W. Peirson 1920-6-22 Riverside Temescal Canyon 304 Comment
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Jun 24 2016
  POM128742  Eriogonum thomasii F. W. Peirson 1927-4-12 7171 Riverside Painted Canyon. Comment
  POM128749  Trichoptilium incisum F. W. Peirson 1927-4-12 s.n. Riverside Painted Canyon Comment
  POM128750  Chorizanthe corrugata F. W. Peirson 1927-4-12 7175 Riverside Painted Canyon. Comment
  POM14735  Stephanomeria pauciflora F. W. Peirson 1922-12-27 3335 Riverside Andreas Canyon, near Palm Springs. Comment
  POM14740  Chrysothamnus paniculatus F. W. Peirson 1922-12-26 3331 Riverside Cabazon, San Gorgonio Pass Comment
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Mar 13 2011
  POM14741  Phacelia ambigua F. W. Peirson 1922-4-11 s.n. Riverside Deep Canyon Wash, Coachella Valley 244 Comment
  POM193461  Leptosiphon lemmonii F. W. Peirson 1929-5-4 8335 Riverside Summit of St John's grade 793 Comment
  POM193710  Allium peninsulare var. peninsulare F. W. Peirson 1933-4-15 10649 Riverside Whitewater River, 4.5 miles above the bridge. 701 Comment
  POM212930  Cryptantha holoptera F. W. Peirson 1935-4-17 11475 Riverside 30 miles north of Blythe. Comment
  POM21637  Psorothamnus schottii F. W. Peirson 1921-4-13 566 Riverside Deep Canyon Wash, Coachella Valley Comment
  POM228765  Pectis papposa F. W. Peirson 1937-11-27 12245 Riverside La quinta, about sea level. Comment
  POM254666  Atriplex lentiformis F. W. Peirson 1924-12-30 s.n. Riverside Thousand Palms Canyon, Coachella Valley. 122 Comment
  POM317055  Lupinus bicolor subsp. microphyllus F. W. Peirson 1922-4-29 5224 Riverside South of Lake Elsinore. 381 Comment
  POM47633  Lotus argophyllus subsp. decorus F. W. Peirson 1919-4-13 s.n. Riverside Murray Canyon, Palm Springs region. Comment
  POM47635  Astragalus nuttallianus var. cedrosensis F. W. Peirson 1922-4-9 584 Riverside Murray Canyon. North bank, 1/2 mile above mouth. Comment
  POM47667  Leymus triticoides F. W. Peirson 1924-6-1 4678 Riverside River lands along Santa Ana River. 152 Comment
  POM48345  Tidestromia oblongifolia F. W. Peirson 1924-12-30 5416 Riverside Thousand-Palms Canyon 122 Comment
  POM48478  Dicoria canescens F. W. Peirson 1924-12-30 5425 Riverside Thousand-Palms Canyon, Colorado Desert 122 Comment
  POM48555  Asclepias subulata F. W. Peirson 1924-12-30 5420 Riverside Thousand-Palms Canyon, north side of Coachella Valley. 122 Comment
  POM48556  Eustoma exaltatum F. W. Peirson 1924-12-30 5419 Riverside Thousand-Palms Canyon, Colorado Desert 122 Comment
  POM49370  Stachys stebbinsii F. W. Peirson 1924-6-2 s.n. Riverside Near foot of Temescal canyon. Comment
  POM71103  Calystegia macrostegia subsp. intermedia F. W. Peirson 1929-5-4 8333 Riverside In clumps on open land near Lake Elsinore. Comment
  POM9919  Stemodia durantifolia F. W. Peirson 1920-12-28 s.n. Riverside Murray Canyon near Palm Springs Comment
  RSA0008494  Lasthenia glabrata subsp. coulteri F. W. Peirson 1922-4-29 2956 Riverside South of Lake Elsinore. 381 Comment
  RSA0017272  Gilia ochroleuca subsp. exilis F. W. Peirson 1919-4-15 921 Riverside Whitewater Grade above Cabazon, San Gorgonio Pass. Comment
  RSA0070921  Pentagramma maxonii F. W. Peirson 1921-3-20 5357 Riverside Andreas Canyon, near Palm Springs. 243 Comment
  RSA100199  Lonicera subspicata var. denudata F. W. Peirson 1920-6-22 217 Riverside Dripping Springs, Temecula River 457 Comment
  RSA100257  Plectritis ciliosa subsp. insignis F. W. Peirson 1922-5-19 3047 Riverside San Jacinto River. 1143 Comment
  RSA100339  Triodanis biflora F. W. Peirson 1926-5-2 6723 Riverside Grade north of Dripping Spring, Temecula River. 427 Comment
  RSA357376  Orcuttia californica F. W. Peirson 1922-5-19 3028 Riverside Menifee Valley Comment
  RSA392815A  Oxytheca trilobata F. W. Peirson 1929-7-29 5020 Riverside Banning to Idyllwild Road 1768 Comment
  RSA408712  Monardella australis subsp. australis F. W. Peirson 1924-7-27 4993 Riverside Dark Canyon, near Deer Springs, San Jacinto Mts. Comment
  RSA409772  Cuscuta salina F. W. Peirson 1924-6-21 s.n. Riverside South of Elsinore Comment
  RSA428780  Solanum umbelliferum F. W. Peirson 1922-4-29 4487 Riverside Leach Canyon. (base of Santa Ana Mts., near Elsinore) 534 Comment
  RSA446662  Stachys bullata F. W. Peirson 1924-6-21 4709 Riverside Temescal Canyon. 290 Comment
  RSA448211  Sidalcea malviflora subsp. sparsifolia F. W. Peirson 1922-5-20 4309 Riverside Hemet Valley, San Jacinto Mountains. 1372 Comment
  RSA453237  Prunus fremontii F. W. Peirson 1922-12-7 s.n. Riverside Andreas Canyon. 610 Comment
  RSA462211  Dodecatheon redolens F. W. Peirson 1924-7-27 4999 Riverside Deer Springs, San Jacinto Mountains. Comment
  RSA498235  Astragalus lentiginosus var. coachellae F. W. Peirson 1920-2-17 s.n. Riverside Whitewater River, Colorado Desert, river at bridge. Comment
  RSA498417  Cercidium floridum F. W. Peirson 1919-4-15 575 Riverside Palm Springs. Large tree S of town. Comment
  RSA498671  Horkelia clevelandii F. W. Peirson 1924-7-28 5006 Riverside Pine Flats Camp 1799 Comment
  RSA498786  Lotus rigidus F. W. Peirson 1920-2-16 s.n. Riverside Murray Canyon, Palm Springs region. 274 Comment
  RSA523971  Mimulus diffusus F. W. Peirson 1929-5-4 s.n. Riverside Summit of St John's grade. 793 Comment
  RSA569479  Tetracoccus F. W. Peirson 1928-4-24 s.n. Riverside Cottonwood Springs. Comment
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Oct 9 2010
  RSA62011  Justicia californica F. W. Peirson 1935-2-22 s.n. Riverside Deep Canyon, about 1000 ft.[west margin Sonoran Desert, Santa Rosa Mtns. -SDW] 305 Comment
  RSA64578A  Eriogonum reniforme F. W. Peirson 1914-04 1737 Riverside Whitewater, west end of Coachella Valley. Comment
  RSA64578B  Eriogonum thomasii F. W. Peirson 1914-04 1737 Riverside Whitewater, west end of Coachella Valley. Comment
  RSA64581  Eriogonum reniforme F. W. Peirson 1928-4-24 7911 Riverside Cottonwood Springs, northern Colorado Desert Comment
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Oct 9 2010
  RSA64582  Eriogonum pusillum F. W. Peirson 1933-4-13 10642 Riverside Deep Canyon to Idyllwild, Santa Rosa Mountains 1372 Comment
  RSA64583  Eriogonum pusillum F. W. Peirson 1928-4-24 7912 Riverside Below Cottonwood Spring, northern edge of Colorado Desert. Comment
  RSA64587  Eriogonum pusillum F. W. Peirson 1928-3-10 7702 Riverside Just east of Whitewater Bridge, near Whitewater, at head of Coachella Valley. Comment
  RSA64621  Eriogonum thomasii F. W. Peirson 1926-1-31 6490 Riverside Dos Palmas [Spring], Colorado Desert. Comment
  RSA64760  Eriogonum thurberi F. W. Peirson 1914-04 1738 Riverside Whitewater at head of Coachella Valley. Comment
  RSA64763  Eriogonum inflatum var. deflatum F. W. Peirson 1932-11-26 9660 Riverside Thousand Palms Comment
  RSA64889  Oxytheca emarginata F. W. Peirson 1922-5-21 3034 Riverside Hemet Valley, San Jacinto Mts. 1372 Comment
  RSA64893  Oxytheca caryophylloides F. W. Peirson 1924-7-29 5019 Riverside 1 miles west of Fullers Mill on Banning to Idyllwild Road, San Jacinto Mts. 1768 Comment
  RSA64894  Oxytheca trilobata F. W. Peirson 1922-5-21 5349 Riverside Hemet Valley, San Jacinto Mts 1372 Comment
  RSA64957  Chenopodium pratericola F. W. Peirson 1918-03 s.n. Riverside Field near Indio. Comment
  RSA65002  Nemacaulis denudata var. gracilis F. W. Peirson 1917-4-1 1780 Riverside Palm Springs. Comment
  RSA65010  Eriogonum wrightii var. nodosum F. W. Peirson 1922-12-27 3333 Riverside Andreas Canyon, east base of San Jacinto Mountains 610 Comment
  RSA65011  Eriogonum wrightii var. membranaceum F. W. Peirson 1937-11-27 12320 Riverside Deep Canyon Rd. at Forest Service camp, a mile or so east of crossing of the Palm Canyon Stream. N. base of Santa Rosa Mountains. 1372 Comment
  RSA65012  Eriogonum wrightii var. nodosum F. W. Peirson 1920-12-28 2340 Riverside Along Palm Canyon stream below the Canyon. Comment
  RSA65036  Silene parishii var. viscida F. W. Peirson 1924-7-27 5001 Riverside Pinnacle, 0.5 miles west of Deer Springs, Comment
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Nov 17 2011
  RSA65122  Eriogonum deflexum var. deflexum F. W. Peirson 1928-11-30 8215 Riverside Near Cottonwood Spring, west end of Eagle Mountains. Comment
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Oct 9 2010
  RSA65123  Eriogonum deflexum var. deflexum F. W. Peirson 1927-4-12 7164 Riverside Painted canyon, near Mecca. Comment
  RSA65145  Eriogonum fasciculatum F. W. Peirson 1928-4-24 7907 Riverside Cottonwood Spring, west end of Eagle Mtns. Comment
  RSA65148  Eriogonum fasciculatum var. polifolium F. W. Peirson 1919-4-14 1759 Riverside Murray Canyon, near Palm Springs. Comment
  RSA65154  Eriogonum elongatum F. W. Peirson 1933-4-15 10651 Riverside Whitewater River, 4.5 miles above the bridge. 701 Comment
  RSA65160  Chorizanthe leptotheca F. W. Peirson 1925-5-20 6012 Riverside Aguanga Comment
  RSA65168  Chorizanthe parryi F. W. Peirson 1922-5-19 3055 Riverside 5 miles northeast of Murrieta on road to Perris Comment
  RSA65172  Chorizanthe fimbriata var. fimbriata F. W. Peirson 1920-6-22 2165 Riverside Dripping Spring southeast of Temecula 457 Comment
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Nov 4 2014
  RSA65174  Chorizanthe fimbriata var. fimbriata F. W. Peirson 1922-5-19 3024 Riverside 3 miles northeast of Murrieta. Comment
  RSA65184  Chorizanthe corrugata F. W. Peirson 1926-2-22 6509 Riverside Thousand-Palms Canyon. 152 Comment
  RSA65200  Chorizanthe brevicornu var. brevicornu F. W. Peirson 1920-2-16 1775 Riverside East of Palm Springs. Comment
  RSA65230  Eriogonum apiculatum F. W. Peirson 1924-7-29 5026 Riverside Open Mountain slope on road from Banning to Idyllwild, San Jacinto Mountains. 1677 Comment
  RSA65245  Chorizanthe rigida F. W. Peirson 1927-4-12 7174 Riverside Painted canyon, near Mecca. Comment
  RSA65246  Chorizanthe rigida F. W. Peirson 1922-4-11 2863 Riverside Deep Canyon Wash, Coachella Valley 244 Comment
  RSA65259  Chorizanthe polygonoides var. longispina F. W. Peirson 1922-5-19 3025 Riverside 3 miles northeast of Murrieta. Comment
  RSA65277  Chorizanthe xanti var. leucotheca F. W. Peirson 1914-04 1776 Riverside Whitewater, west end of Coachella Valley. Comment
  RSA65306  Eriogonum inflatum var. inflatum F. W. Peirson 1914-1 1734 Riverside Whitewater, N.W. Colorado Desert. Comment
  RSA65309  Eriogonum thurberi F. W. Peirson 1922-5-19 4204 Riverside 5 miles northeast of Murrieta. Comment
  RSA65363  Atriplex canescens var. laciniata F. W. Peirson 1924-12-30 s.n. Riverside Thousand Palms Canyon, Coachella Valley. 122 Comment
  RSA65378  Atriplex polycarpa F. W. Peirson 1927-11-25 s.n. Riverside Thousand-Palm Canyon, edge of Coachella Valley. Comment
  RSA65388  Atriplex hymenelytra F. W. Peirson 1926-2-22 6502 Riverside Thousand-Palms Canyon; Coachella Valley Comment
  RSA65390  Atriplex hymenelytra F. W. Peirson 1924-12-30 5415 Riverside Thousand-Palms Canyon, edge of Coachella Valley. 122 Comment
  RSA65391  Atriplex hymenelytra F. W. Peirson 1930-3-29 8694 Riverside Painted Canyon, near Mecca, Colorado Desert. Comment
  RSA65411  Cistanthe ambigua F. W. Peirson 1926-2-22 6512 Riverside 0.5 mile north of camp in Palm Grove, Thousand-Palm Canyon, Coachella Valley. Comment
  RSA65413  Cistanthe monandra F. W. Peirson 1921-4-13 4317 Riverside Foot of Deep Canyon, Coachella Valley 274 Comment
  RSA65417  Cistanthe monandra F. W. Peirson 1924-7-29 5028 Riverside Banning to Idyllwild road, San Jacinto Mountains. 1570 Comment
  RSA65432  Cistanthe ambigua F. W. Peirson 1926-1-31 6485 Riverside About a mile above station on Mecca Road, Dos Palmas. Colorado Desert. Comment
  RSA65578  Spergularia platensis F. W. Peirson 1922-4-29 2926 Riverside South of Lake Elsinore. 381 Comment
  RSA65623  Opuntia ramosissima F. W. Peirson 1928-4-24 7906 Riverside Below Cottonwood Springs, Eagle Mountains. Northern Colorado Desert. Comment
  RSA65624  Cylindropuntia echinocarpa F. W. Peirson 1928-4-24 7901 Riverside Hills north and northeast of Cottonwood Springs, north end of Colorado Desert. Comment
  RSA65625  Elatine californica F. W. Peirson 1922-5-21 4109 Riverside Hemet Valley. [Hemet Valley = Garner Valley -SDW] 1338 Comment
  RSA65628  Callitriche marginata F. W. Peirson 1922-4-29 2943 Riverside South of Lake Elsinore. 381 Comment
  RSA65634  Achyronychia cooperi F. W. Peirson 1922-4-8 1862 Riverside Whitewater, head of Coachella Valley, Colorado Desert. Comment
  RSA65651  Eleocharis palustris F. W. Peirson 1922-4-29 4167 Riverside Dripping Spring, Temecula River, southwestern Riverside Co., California 457 Comment
  RSA65658  Montia fontana F. W. Peirson 1922-5-20 s.n. Riverside Hemet Valley. (San Jacinto Mountains) 1402 Comment
  RSA65708  Silene antirrhina F. W. Peirson 1919-4-14 5321 Riverside Murray Canyon near Palm Springs 381 Comment
  RSA65716  Loeflingia squarrosa F. W. Peirson 1922-4-9 4156 Riverside Palm Canyon Region, near Palm Springs. Comment
  RSA65720  Claytonia parviflora subsp. utahensis F. W. Peirson 1921-3-22 2389 Riverside Murray Canyon near Palm Springs. 457 Comment
  RSA65796  Lepidium virginicum var. pubescens F. W. Peirson 1922-5-21 3031 Riverside Along east side of Hemet Valley 1357 Comment
  RSA65823  Descurainia pinnata subsp. glabra F. W. Peirson 1921-3-23 2592 Riverside Deep Canyon, Coachella Valley. Comment
  RSA65882  Monolepis nuttalliana F. W. Peirson 1918-03 1834 Riverside Field near Indio. Comment
  RSA65895  Centrostegia thurberi F. W. Peirson 1922-5-21 5343 Riverside Hemet Valley, San Jacinto Mountains 1372 Comment
  RSA65917  Polygonum ramosissimum F. W. Peirson 1938-4-10 12379 Riverside 1-2 miles west of Blythe. Comment
  RSA65926  Eriogonum inflatum var. deflatum F. W. Peirson 1924-12-30 5412 Riverside Thousand-Palms Canyon, Colorado Desert 122 Comment
  RSA65992  Eriogonum umbellatum subsp. munzii F. W. Peirson 1924-7-28 5014 Riverside Pine Flats Camp 1799 Comment
  RSA66014  Eriogonum nudum var. pauciflorum F. W. Peirson 1924-7-29 5035 Riverside Banning to Idyllwild Rd. 1555 Comment
  RSA66027  Eriogonum gracile var. gracile F. W. Peirson 1922-12-26 3334 Riverside Cabazon, W edge of Colorado Desert. Comment
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Mar 13 2011
  RSA66029  Eriogonum gracile var. gracile F. W. Peirson 1924-7-29 5029 Riverside Banning to Idyllwild road, San Jacinto Mountains. 1570 Comment
  RSA66087  Tropidocarpum gracile F. W. Peirson 1919-4-14 2811 Riverside Murray Canyon, near Palm Springs. Comment
  RSA66148  Lepidium lasiocarpum F. W. Peirson 1919-4-13 5328 Riverside Tahquitz Creek near Palm Springs. Comment
  RSA66172  Draba cuneifolia var. integrifolia F. W. Peirson 1919-4-14 649 Riverside Murray Canyon, Palm Springs Region. Comment
  RSA66188  Romneya coulteri F. W. Peirson 1920-6-22 2186 Riverside Temescal Canyon. 305 Comment
  RSA66236  Platystemon californicus F. W. Peirson 1922-5-21 3033 Riverside Along east side of Hemet Valley 1357 Comment
  RSA66240  Platystemon californicus F. W. Peirson 1922-4-28 5325 Riverside Temescal Canyon, SW Riverside Co. 274 Comment
  RSA66241  Platystemon californicus F. W. Peirson 1922-4-29 2935 Riverside South of Lake Elsinore. 381 Comment
  RSA66252  Arabis johnstonii F. W. Peirson 1922-5-21 3030 Riverside Along east side of Hemet Valley 1357 Comment
  RSA66258  Dendromecon rigida subsp. rigida F. W. Peirson 1924-7-29 5025 Riverside Road between Banning and Idyllwild. 1768 Comment
  RSA66277  Eschscholzia parishii F. W. Peirson 1922-4-9 2872 Riverside Murray Canyon, Palm Springs region 305 Comment
  RSA66302  Papaver californicum F. W. Peirson 1918-03 1890 Riverside Irrigated field near Indio. Comment
  RSA66307  Argemone munita subsp. munita F. W. Peirson 1925-5-20 6015 Riverside Burned area in chaparral, 1 mile northwest of Dripping Spring, W. Riverside Co. 457 Comment
  RSA66494  Arabis perennans F. W. Peirson 1933-4-15 10656 Riverside Steep South slope of Whitewater Canyon, head of Coachella Valley. 701 Comment
  RSA66508  Arabis perennans F. W. Peirson 1922-4-10 2869 Riverside Murray Canyon near Palm Springs. 610 Comment
  RSA66528  Athysanus pusillus F. W. Peirson 1921-3-22 2833 Riverside Murray Canyon near Palm Springs. 457 Comment
  RSA66544  Dithyrea californica F. W. Peirson 1920-2-14 4178 Riverside Whitewater Station, Colorado Desert Comment
  RSA66546  Dithyrea californica F. W. Peirson 1926-1-31 6484 Riverside Abundant on rocky slopes, Dos Palmas [Spring], Colorado Desert. Comment
  RSA66547  Dithyrea californica F. W. Peirson 1914-04 1918 Riverside Whitewater at head of Coachella Valley. Comment
  RSA66561  Draba cuneifolia var. integrifolia F. W. Peirson 1920-2-16 2326 Riverside Palm Canyon Creek near Palm Springs. Comment
  RSA66564  Hymenolobus procumbens F. W. Peirson 1922-4-30 1896 Riverside Road from Temecula River to Hemet. 518 Comment
  RSA66566  Hymenolobus procumbens F. W. Peirson 1921-4-11 2398 Riverside Murray Canyon. Palm Springs region. Comment
  RSA66574  Lepidium dictyotum var. acutidens F. W. Peirson 1930-5-10 8771 Riverside 1 mile east of Perris 457 Comment
  RSA66701  Arabis perennans F. W. Peirson 1919-4-13 660 Riverside Along the Tahquitz creek, East of Palm Springs, Riverside. Comment
  RSA66724  Galium stellatum F. W. Peirson 1919-4-12 1191 Riverside Along the Tahquitz Creek stream near Palm Springs Comment
  RSA66733  Lepidium lasiocarpum F. W. Peirson 1920-2-15 2834 Riverside Palm Springs, Tahquitz Camp. Comment
  RSA66743  Eschscholzia minutiflora F. W. Peirson 1914-04 1886 Riverside Whitewater, Nw corner of Colorado Desert, River Co. Comment
  RSA66744  Eschscholzia parishii F. W. Peirson 1927-4-12 7167 Riverside Painted canyon, near Mecca. Comment
  RSA66747  Eschscholzia minutiflora F. W. Peirson 1921-3-20 4175 Riverside Andreas Canyon near Palm Springs 213 Comment
  RSA66762  Arabis pulchra F. W. Peirson 1941-4-9 13077 Riverside Open desert among shrubs; Pinto Basin road at junction with road to Cottonwood Springs. Comment
  RSA66770  Cleome isomeris F. W. Peirson 1921-3-23 2382 Riverside Rocky entrance to Deep Canyon. south side of Coachella Valley. Comment
  RSA66774  Cleome isomeris F. W. Peirson 1921-3-19 1923 Riverside Whitewater Grade near Cabazon, western edge of Colorado Desert. Comment
  RSA66779  Thysanocarpus curvipes var. curvipes F. W. Peirson 1922-5-21 3017 Riverside Hemet Valley. [Hemet Valley = Garner Valley -SDW] 1338 Comment
  RSA66785  Thysanocarpus laciniatus F. W. Peirson 1921-3-22 4187 Riverside Murray Canyon, Near Palm Springs. 366 Comment
  RSA66799  Arabis glaucovalvula F. W. Peirson 1941-4-10 13078 Riverside White Tank Region at summit of grade S of 29 Palms. Comment
  RSA66803  Streptanthella longirostris F. W. Peirson 1918-03 668 Riverside Field near Indio. Comment
  RSA66806  Streptanthella longirostris F. W. Peirson 1920-2-14 5332 Riverside Whitewater Station, Colorado Desert Comment
  RSA66809  Streptanthella longirostris F. W. Peirson 1919-4-15 667 Riverside Whitewater Grade above Cabazon, San Gorgonio Pass. Comment
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Mar 13 2011
  RSA67108  Myosurus minimus var. filiformis F. W. Peirson 1922-5-20 3035 Riverside Hemet Valley, San Jacinto Mts. 1387 Comment
  RSA67109  Myosurus minimus subsp. apus F. W. Peirson 1922-4-29 2945 Riverside South of Lake Elsinore. 381 Comment
  RSA67110  Myosurus minimus subsp. apus F. W. Peirson 1922-5-19 4171 Riverside Menifee Valley Comment
  RSA67347  Lepidium nitidum F. W. Peirson 1918-03 2327 Riverside Whitewater Grade, NW corner of Colorado Desert. Comment
  RSA67363  Lepidium fremontii F. W. Peirson 1928-4-24 7902 Riverside Cottonwood Springs, northern Colorado Desert Comment
  RSA67365  Guillenia lasiophylla F. W. Peirson 1922-4-9 2918 Riverside Andreas Canyon near Palm Springs, Coachella Valley. 671 Comment
  RSA67370  Guillenia lasiophylla F. W. Peirson 1919-4-13 661 Riverside Along Tahquitz Canyon stream, SE of Palm Springs. Comment
  RSA68339  Lepidium lasiocarpum F. W. Peirson 1933-4-13 10636 Riverside Road from Deep Canyon to Idyllwild. 610 Comment
  RSA68342  Lepidium lasiocarpum F. W. Peirson 1916-04 679 Riverside Near Palm Springs. Comment
  RSA68622  Calochortus weedii var. weedii Frank W. Peirson 1920-6-22 2180 Riverside Grade south of Temecula River, going toward Dripping Spring 427 Comment
  RSA68632  Calochortus splendens Frank W. Peirson 1924-7-27 4997 Riverside Deer Springs, San Jacinto Mountains. Comment
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May 26 2014
  RSA68692  Muilla maritima F. W. Peirson 1922-4-29 2942 Riverside 2 miles south of Elsinore. 366 Comment
  RSA68694  Muilla maritima F. W. Peirson 1922-5-20 3046 Riverside Hemet Valley. (San Jacinto Mountains) 1402 Comment
  RSA68710  Lilium parryi Frank W. Peirson 1924-7-27 5003 Riverside South side of Dark Canyon, San Jacinto Mountains. 2499 Comment
  RSA68718  Hesperocallis undulata Frank W. Peirson 1927-4-13 7178 Riverside Canyon near east end of Santa Rosa Mountains, 8 miles from boulevard; desert near Mecca. Comment
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Nov 13 2011
  RSA68780  Delphinium parishii F. W. Peirson 1928-4-24 7897 Riverside Cottonwood Springs, northern Colorado Desert Comment
  RSA68981  Plantago ovata var. fastigiata F. W. Peirson 1926-2-22 6510 Riverside Thousand-Palms Canyon; Coachella Valley Comment
  RSA68986  Plantago ovata var. fastigiata F. W. Peirson 1930-3-29 8693 Riverside Painted canyon, near Mecca. Comment
  RSA68989  Plantago ovata var. fastigiata F. W. Peirson 1914-04 s.n. Riverside Whitewater at head of Coachella Valley. Comment
  RSA69040  Dodecatheon redolens F. W. Peirson 1924-7-27 4999 Riverside Deer Springs, San Jacinto Mtns. 2668 Comment
  RSA69241  Pterospora andromedea F. W. Peirson 1924-7-27 4987 Riverside Dark Canyon, San Jacinto Mts. 1905 Comment
  RSA69269  Chimaphila menziesii F. W. Peirson 1924-7-27 4986 Riverside Dark Canyon, San Jacinto Mts. 1905 Comment
  RSA69271  Chimaphila umbellata subsp. occidentalis F. W. Peirson 1924-7-27 5004 Riverside about 1 mile west of Deer Springs, San Jacinto Mts. 2439 Comment
  RSA69330A  Rhododendron occidentale var. californicum F. W. Peirson 843 Riverside Fruiting specimen from San Jacinto Mtns. Comment
  RSA69412  Delphinium parryi F. W. Peirson 1922-5-18 3051 Riverside Lake Elsinore, Riverside Co. Comment
  RSA69414  Delphinium parryi F. W. Peirson 1929-5-4 8337 Riverside Mostly about bushes on low hill about 2 miles south of summit of St. Johns Grade south of Hemet. 701 Comment
  RSA69419  Eustoma exaltatum F. W. Peirson 1919-4-14 879 Riverside Palm Canyon, near Palm Springs Comment
  RSA69420  Eustoma exaltatum F. W. Peirson 1924-12-30 5419 Riverside Thousand-Palms Canyon, Colorado Desert 122 Comment
  RSA69435  Frasera parryi F. W. Peirson 1924-6-28 5008 Riverside Pine flats Camp, San Jacinto Mts. 1799 Comment
  RSA69461  Mirabilis laevis var. retrorsa F. W. Peirson 1928-3-10 7701 Riverside Snow Creek Auto Camp at Whitewater. Comment
  RSA69464  Mirabilis laevis var. crassifolia F. W. Peirson 1921-3-19 69464 Riverside Cabazon, San Gorgonio Pass. Comment
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Mar 13 2011
  RSA69472  Mirabilis tenuiloba F. W. Peirson 1922-4-11 2917 Riverside Deep Canyon Wash, Colorado Desert. 274 Comment
  RSA69479  Luzula comosa F. W. Peirson 1922-5-19 3039 Riverside San Jacinto River. 1143 Comment
  RSA69561  Mentzelia jonesii F. W. Peirson 1928-4-24 7909 Riverside Below Cottonwood Springs, Eagle Mountains. Northern Colorado Desert. Comment
  RSA69581  Mentzelia involucrata var. megalantha F. W. Peirson 1933-4-15 10652 Riverside Whitewater River, 4.5 miles above the bridge. 701 Comment
  RSA69582  Mentzelia involucrata F. W. Peirson 1922-4-9 753 Riverside Palm Canyon stream near Alkali Canyon, Riverside County Comment
  RSA69584  Mentzelia involucrata var. megalantha F. W. Peirson 1926-1-31 6494 Riverside Dos Palmas [Spring], Colorado Desert. Comment
  RSA69585  Mentzelia involucrata F. W. Peirson 1933-4-13 10637 Riverside Road from Deep Canyon to Idyllwild. 610 Comment
  RSA69608  Boerhavia coccinea F. W. Peirson 1922-12-28 5218 Riverside Andreas Canyon, east base of San Jacinto Mts. 244 Comment
  RSA69609  Boerhavia coccinea F. W. Peirson 1916-04 1848 Riverside Near Palm Springs. Comment
  RSA69621  Juncus acutus subsp. leopoldii F. W. Peirson 1921-3-20 2366 Riverside Palm Canyon, east base of San Jacinto Mountains 305 Comment
  RSA69622  Juncus acutus subsp. leopoldii F. W. Peirson 1924-12-30 5409 Riverside Thousand-Palms Canyon, north side of Coachella Valley. 122 Comment
  RSA69630  Juncus mexicanus F. W. Peirson 1924-6-1 4676 Riverside River lands along Santa Ana River. 152 Comment
  RSA69660  Juncus macrophyllus F. W. Peirson 1924-7-28 5011 Riverside Pine Flats Camp 1799 Comment
  RSA69673  Juncus bufonius F. W. Peirson 1922-4-29 5353 Riverside South of Lake Elsinore. 381 Comment
  RSA69674  Juncus bufonius F. W. Peirson 1919-4-14 2845 Riverside Murray Canyon, near Palm Springs. Comment
  RSA69679  Allenrolfea occidentalis F. W. Peirson 1926-1-31 6487 Riverside Dos Palmas, Colorado Desert. Comment
  RSA69690  Mentzelia desertorum F. W. Peirson 1922-4-12 751 Riverside along boulevard, 18 mi. southeast of Coachella. Comment
  RSA69725  Lemna gibba F. W. Peirson 1922-5-19 3018 Riverside Hemet Valley, San Jacinto Mountains. 1341 Comment
  RSA69842  Juncus cooperi F. W. Peirson 1933-4-12 10634 Riverside Dos Palmas, northern Colorado desert 30 Comment
  RSA69882  Forestiera pubescens F. W. Peirson 1933-4-13 10647 Riverside Between Deep Canyon and Idyllwild, at Palm Canyon crossing 1387 Comment
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Oct 31 2011
  RSA69885  Forestiera pubescens F. W. Peirson 1922-5-21 3044 Riverside Hemet Valley, San Jacinto Mts 1372 Comment
  RSA69914  Asclepias subulata F. W. Peirson 1920-12-29 2339 Riverside Point of Rocks, 1.5 miles east of Whitewater Station, head of Coachella Valley 335 Comment
  RSA69915  Asclepias subulata F. W. Peirson 1928-4-23 7886 Riverside in sandy wash land; 6 mi. n.e. of Mecca, on road to Blythe Comment
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Oct 23 2011
  RSA69916  Asclepias subulata F. W. Peirson 1935-4-17 11476 Riverside 30 miles north of Blythe. Comment
  RSA69917  Asclepias subulata F. W. Peirson 1924-12-30 5420 Riverside Near mouth of Thousand Palms Canyon, Coachella Valley 91 Comment
  RSA69958  Abronia villosa var. aurita F. W. Peirson 1922-4-21 3340 Riverside Hemet Valley 1357 Comment
  RSA69968  Abronia villosa F. W. Peirson 1918-03 2222 Riverside Irrigated field near Indio. Comment
  RSA69991  Allionia incarnata F. W. Peirson 1919-4-13 1849 Riverside Tahquitz Canyon stream, near Palm Springs. Comment
  RSA69992  Allionia incarnata F. W. Peirson 1922-12-28 5221 Riverside Andreas Canyon near Palm Springs Comment
  RSA70002  Tidestromia oblongifolia F. W. Peirson 1939-11-25 s.n. Riverside Foot of mountain near Painted Canyon. Comment
  RSA70003  Tidestromia oblongifolia F. W. Peirson 1937-11-27 12319 Riverside La Quinta, Coachella Valley. At sea-level. 0 Comment
  RSA70006  Tidestromia oblongifolia subsp. oblongifolia F. W. Peirson 1924-12-30 5416 Riverside Thousand-Palms Canyon, Colorado Desert 122 Comment
  RSA70007  Tidestromia oblongifolia F. W. Peirson 1928-11-30 8211 Riverside Foot canyon below Shavers Well, NE of Mecca. Comment
  RSA70039  Arthrocnemum subterminale F. W. Peirson 1922-5-19 3068 Riverside 2 miles southeast of Perris Comment
  RSA70053  Epipactis gigantea Frank W. Peirson 1924-7-27 4984 Riverside Dark Canyon, San Jacinto Mountains. 1799 Comment
  RSA70054  Juncus rugulosus F. W. Peirson 1924-7-28 5010 Riverside Pine Flats Camp 1799 Comment
  RSA70059  Juncus bufonius var. occidentalis F. W. Peirson 1922-5-19 3019 Riverside Menifee Valley, south of Perris. 457 Comment
  RSA70062  Juncus rugulosus F. W. Peirson 1920-12-29 2337 Riverside Andreas Canyon, Palm Springs Regon. 259 Comment
  RSA70095  Juncus bufonius var. occidentalis F. W. Peirson 1922-4-29 2928 Riverside South of Lake Elsinore. 381 Comment
  RSA70124  Dichelostemma capitatum subsp. pauciflorum F. W. Peirson 1921-3-22 s.n. Riverside Murray Canyon, Near Palm Springs. 366 Comment
  RSA70127  Brodiaea filifolia F. W. Peirson 1922-5-19 3070 Riverside 2 miles southeast of Perris Comment
  RSA70160  Dichelostemma capitatum subsp. pauciflorum F. W. Peirson 1922-4-9 2903 Riverside Andreas Canyon near Palm Springs, Colorado Desert, 335 Comment
  RSA70166  Brodiaea filifolia F. W. Peirson 1930-5-10 8772 Riverside 1 mile east of Perris 457 Comment
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Nov 15 2007
  RSA70180  Allium munzii F. W. Peirson 1922-4-28 2961 Riverside Temescal Canyon, western Riverside Co.. 320 Comment
  RSA70185  Yucca schidigera Frank W. Peirson 1921-3-19 2388 Riverside 2 miles east of Cabazon. Comment
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Mar 13 2011
  RSA70189  Allium parishii F. W. Peirson 1928-4-25 7918 Riverside Western edge of broken country northwest of Cottonwood Springs, southern Mojave Desert. Comment
  RSA70222  Allium haematochiton F. W. Peirson 1921-3-19 2394 Riverside 4 miles west of Beaumont, on road to Redlands. Comment
  RSA70224  Allium haematochiton F. W. Peirson 1919-4-14 1652 Riverside Murray Canyon, Palm Springs Region. 457 Comment
  RSA70237  Allium peninsulare var. peninsulare F. W. Peirson 1933-4-15 10649 Riverside Whitewater Canyon, 4.5 miles above bridge at head of Coachella Valley. 701 Comment
  RSA70238  Allium peninsulare F. W. Peirson 1930-5-10 8773 Riverside St. Johns Grade. south of Hemet 610 Comment
  RSA70334  Asclepias californica F. W. Peirson 1922-4-29 4255 Riverside Leach Canyon. ( base of Santa Ana Mts., near Elsinore) 534 Comment
  RSA70346  Funastrum cynanchoides var. hartwegii F. W. Peirson 1925-5-20 6010 Riverside Aguanga. 610 Comment
  RSA70347  Funastrum hirtellum F. W. Peirson 1927-4-12 7160 Riverside Painted Canyon, near Mecca Comment
  RSA70349  Funastrum cynanchoides var. hartwegii F. W. Peirson 1916-04 888 Riverside Near Palm Springs. Comment
  RSA70350  Funastrum hirtellum F. W. Peirson 1922-4-9 4118 Riverside Palm Canyon Region, near Palm Springs. Comment
  RSA70351  Funastrum cynanchoides var. hartwegii F. W. Peirson 1921-3-20 4119 Riverside Palm Canyon near Palm Springs Comment
  RSA70375  Dichelostemma capitatum subsp. pauciflorum F. W. Peirson 1919-4-12 s.n. Riverside Tahquitz canyon near Palm Springs. Comment
  RSA70377  Euphorbia palmeri F. W. Peirson 1922-5-21 4257 Riverside Southeast of Keene camp. San Jacinto mtns, 1463 Comment
  RSA70386  Euphorbia polycarpa var. hirtella F. W. Peirson 1920-12-28 2040 Riverside Wash coming down from the east; lower part of Palm Canyon. Comment
  RSA70387  Euphorbia polycarpa var. hirtella F. W. Peirson 1924-12-30 5418 Riverside Abundant in dry desert sands; Thousand Palms Canyon. 122 Comment
  RSA70388  Euphorbia polycarpa var. hirtella F. W. Peirson 1930-3-29 8689 Riverside Painted canyon, near Mecca. Comment
  RSA70391  Euphorbia polycarpa var. hirtella F. W. Peirson 1928-4-24 7910 a Riverside Below Cottonwood Spring, northern edge of Colorado Desert. Comment
  RSA70392  Chamaesyce setiloba F. W. Peirson 1928-4-24 7910 Riverside Below Cottonwood Springs, Eagle Mountains. Northern Colorado Desert. Comment
  RSA70413  Arctostaphylos pungens F. W. Peirson 1922-5-20 4465 Riverside Hemet Valley, San Jacinto Mts. 1494 Comment
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Mar 16 2007
  RSA70426  Ditaxis lanceolata F. W. Peirson 1927-4-12 7169 Riverside In Painted Canyon near Mecca. Comment
  RSA70427  Ditaxis lanceolata F. W. Peirson 1921-3-23 2805 Riverside Deep Canyon Wash, 12 miles southeast of Palm Springs. 152 Comment
  RSA70429  Ditaxis lanceolata F. W. Peirson 1914-04 2042 Riverside Whitewater, Nw corner of Colorado Desert, River Co. Comment
  RSA70430  Ditaxis serrata F. W. Peirson 1932-12-28 s.n. Riverside Andreas Canyon, near Palm Springs 244 Comment
  RSA70431  Ditaxis californica F. W. Peirson 1921-3-23 2043 Riverside Deep Canyon Wash, 12 miles southeast of Palm Springs. 152 Comment
  RSA70433  Bernardia incana F. W. Peirson 1928-4-25 7917 Riverside Cottonwood Spring Region, Northern Colorado Desert. Comment
  RSA70462  Allium cratericola F. W. Peirson 1922-5-21 3069 Riverside Near Garner Ranch, Hemet Valley, San Jacinto Mountains 1372 Comment
  RSA70499  Geranium carolinianum F. W. Peirson 1922-4-10 2859 Riverside Murray Canyon, near Palm Springs. 305 Comment
  RSA70546  Chamaesyce arizonica F. W. Peirson 1922-12-28 4256 Riverside Andreas Canyon near Palm Springs Comment
  RSA70554  Croton californicus var. mohavensis F. W. Peirson 1920-2-14 s.n. Riverside Whitewater Station, Colorado Desert Comment
  RSA70555  Croton californicus F. W. Peirson 1932-11-26 9661 Riverside Thousand Palms. 122 Comment
  RSA70558  Croton californicus F. W. Peirson 1920-12-29 4439 Riverside 1.5 miles east of Whitewater Station, head of Coachella Valley. Comment
  RSA70608  Agave deserti subsp. deserti Frank W. Peirson 1921-4-13 2290 Riverside Deep Canyon; north base of Santa Rosa Mountains, Riverside. 335 Comment
  RSA70823  Arctostaphylos parryana subsp. desertica F. W. Peirson 1921-3-21 2577 Riverside Gordon Trail from Andreas Canyon, east base of San Jacinto Mts. 1829 Comment
  RSA70867  Arctostaphylos pringlei subsp. drupacea F. W. Peirson 1921-3-21 2386 Riverside Gordon Trail from Andreas Canyon, east base of San Jacinto Mts. 1829 Comment
  RSA70996  Cuscuta californica F. W. Peirson 1914-04 898 Riverside Whitewater at head of Coachella Valley. Comment
  RSA70999  Cuscuta umbellata F. W. Peirson 1932-11-26 9659 Riverside Thousand Palms Comment
  RSA71003  Cuscuta ceanothi F. W. Peirson 1924-7-29 5036 Riverside Banning to Idyllwild Rd. 1555 Comment
  RSA71009  Cuscuta salina F. W. Peirson 1924-6-21 4760 Riverside Along south end of Lake Elsinore 381 Comment
  RSA71010  Cuscuta californica F. W. Peirson 1921-4-13 2399 Riverside Deep Canyon; north base of Santa Rosa Mountains, Riverside. 152 Comment
  RSA71017  Cressa truxillensis F. W. Peirson 1922-5-21 4254 Riverside near foot of Jack Rabbit Grade. (south of Moreno) 427 Comment
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Mar 20 2011
  RSA71798  Gilia capitata subsp. abrotanifolia F. W. Peirson 1924-7-29 5034 Riverside Banning to Idyllwild road, San Jacinto Mountains. 1570 Comment
  RSA71802  Gilia stellata F. W. Peirson 1933-4-16 10640 Riverside Deep Canyon to Idyllwild road 1067 Comment
  RSA71807  Gilia stellata F. W. Peirson 1920-2-16 2297 Riverside Foot of Alkali Canyon, southeast of Palm Canyon, east base of San Jacintos Mountains Comment
  RSA71813  Saltugilia australis F. W. Peirson 1920-2-16 2296 Riverside Andreas Canyon, San Jacinto Mts. 274 Comment
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Oct 2 2011
  RSA71926  Aliciella latifolia F. W. Peirson 1927-4-12 7168 Riverside Painted canyon, near Mecca. Comment
  RSA71927  Aliciella latifolia F. W. Peirson 1926-1-31 6498 Riverside Dos Palmas Spring, NE of Mecca Comment
  RSA71928  Aliciella latifolia F. W. Peirson 1921-3-22 2385 Riverside Andreas Canyon, Palm Springs region Comment
  RSA71929  Aliciella latifolia F. W. Peirson 1922-4-11 2871 Riverside Deep Canyon Region, north base of Santa Rosa Mountains Comment
  RSA71998  Phlox austromontana F. W. Peirson 1922-5-20 908 Riverside Hemet Valley, San Jacinto Mountains. 1371 Comment
  RSA72090  Epilobium canum subsp. latifolium F. W. Peirson 1924-7-29 5027 Riverside Open Mountain slope on road from Banning to Idyllwild, San Jacinto Mountains. 1677 Comment
  RSA72096  Epilobium canum subsp. latifolium F. W. Peirson 1922-12-27 336 Riverside Andreas Canyon, near Palm Springs. Comment
  RSA72167  Epilobium ciliatum subsp. ciliatum F. W. Peirson 1924-7-28 5012 Riverside Pine Flats Camp 1799 Comment
  RSA72193  Oenothera californica subsp. californica F. W. Peirson 1914-04 387 Riverside Beaumont, San Gorgonio Pass. Comment
  RSA72201  Camissonia pallida subsp. hallii F. W. Peirson 1914-04 791 Riverside Whitewater east of Beaumont. Comment
  RSA72237  Camissonia claviformis subsp. aurantiaca F. W. Peirson 1920-2-16 2707 Riverside Palm Canyon stream below the canyon, Palm Springs. region Comment
  RSA72245  Camissonia claviformis subsp. aurantiaca F. W. Peirson 1914-04 785 Riverside Whitewater at head of Coachella Valley. Comment
  RSA72286  Gilia angelensis F. W. Peirson 1923-3-28 4129 Riverside North of Lake Elsinore near Brickyard. Comment
  RSA72287  Gilia angelensis F. W. Peirson 1929-5-4 8334 Riverside Summit of St John's grade. 792 Comment
  RSA72288  Gilia angelensis F. W. Peirson 1922-5-19 4130 Riverside 5 miles northeast of Murrieta on road to Menifee Valley. 427 Comment
  RSA72315  Gilia diegensis F. W. Peirson 1922-5-21 4137 Riverside Along east side of Hemet Valley 1357 Comment
  RSA72319  Gilia diegensis F. W. Peirson 1917-4-1 925 Riverside Along south edge of Colorado Desert embayment east of Palm Springs, above ''Garden of Eden'. Comment
  RSA72330  Epilobium canum subsp. latifolium F. W. Peirson 1928-11-30 8212 Riverside Cottonwood Spring, northern Colorado Desert. Comment
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Oct 9 2010
  RSA73013  Leptosiphon lemmonii F. W. Peirson 1919-4-15 943 Riverside Whitewater Grade east of Banning 610 Comment
  RSA73047  Leptosiphon androsaceus F. W. Peirson 1922-4-28 4472 Riverside Leach Canyon, near Elsinore 534 Comment
  RSA73056  Leptosiphon lemmonii F. W. Peirson 1922-4-28 2931 Riverside Temescal Canyon. 335 Comment
  RSA73057  Leptosiphon lemmonii F. W. Peirson 1938-5-30 12414 Riverside Thomas Mountain, Hemet Valley. 1402 Comment
  RSA73075  Leptosiphon liniflorus F. W. Peirson 1924-7-2 5032 Riverside Banning to Idyllwild road. 1570 Comment
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Nov 17 2011
  RSA73087  Linanthus dianthiflorus subsp. dianthiflorus F. W. Peirson 1922-5-20 4471 Riverside Hemet Valley, San Jacinto Mountains. 1371 Comment
  RSA73089  Linanthus dianthiflorus subsp. dianthiflorus F. W. Peirson 1922-4-30 2930 Riverside St. John's Grade, Baustista Creek, south of Hemet. 762 Comment
  RSA73148  Navarretia fossalis F. W. Peirson 1922-5-19 4242 Riverside 5 miles northeast of Murrieta on road to Perris Comment
  RSA73330  Clarkia epilobioides F. W. Peirson 1919-4-14 4457 Riverside Murray Canyon, Palm Springs Region. 457 Comment
  RSA73679  Leptosiphon floribundus F. W. Peirson 1922-4-28 946 Riverside Leach Canyon Near Lake Elsinore. 549 Comment
  RSA73683  Linanthus aureus F. W. Peirson 1928-4-23 7887 Riverside 2.5 miles below cottonwood Springs, Riverside County Comment
  RSA74148  Phacelia distans F. W. Peirson 1922-4-9 956 Riverside Lower part of Murray Canyon, near Palm Springs Comment
  RSA74172  Phacelia ambigua F. W. Peirson 1920-2-16 971 Riverside Palm Canyon Stream, Near foot of Alkali Canyon east of Palm Canyon, Riverside County. Comment
  RSA74175  Phacelia ambigua F. W. Peirson 1922-4-9 4126 Riverside Palm Canyon Region, near Palm Springs. Comment
  RSA74497  Phacelia campanularia subsp. vasiformis F. W. Peirson 1928-4-24 7896 Riverside Below Cottonwood Spring, northern edge of Colorado Desert. Comment
  RSA74706  Phacelia rotundifolia F. W. Peirson 1919-4-13 4125 Riverside Alkali Canyon, eastward from Palm Canyon; Colorado Desert. Comment
  RSA74713  Nama demissa var. deserti F. W. Peirson 1920-2-15 2315 Riverside Palm Springs, Tahquitz Camp. Comment
  RSA74715  Nama demissa var. deserti F. W. Peirson 1926-1-31 6483 Riverside Dos Palmas [Spring], Colorado Desert. Comment
  RSA74790  Phacelia campanularia F. W. Peirson 1926-2-22 6499 Riverside On talus slope east of bridge over Whitewater River, head of Coachella Valley Comment
  RSA74791  Phacelia campanularia F. W. Peirson 1917-4-1 4123 Riverside Palm Springs Comment
  RSA74795  Phacelia pedicellata F. W. Peirson 1920-2-16 970 Riverside Palm Canyon Stream, Near foot of Alkali Canyon east of Palm Canyon, Riverside County. Comment
  RSA74836  Phacelia suaveolens subsp. keckii F. W. Peirson 1931-5-30 9378 Riverside Trail from Glen Ivy to Santiago Peak 1372 Comment
  RSA74932  Phacelia distans F. W. Peirson 1928-4-24 7903 Riverside Cottonwood Springs, northern Colorado Desert Comment
  RSA74949  Phacelia distans F. W. Peirson 1918-03 957 Riverside Field near Indio. Comment
  RSA74951  Phacelia distans F. W. Peirson 1927-4-12 7163 Riverside Painted canyon, near Mecca. Comment
  RSA74954  Phacelia distans F. W. Peirson 1918-03 955 Riverside Cabazon, San Gorgonio Pass. Comment
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Mar 13 2011
  RSA75124  Nemacladus sigmoideus F. W. Peirson 1928-4-24 7913 Riverside Below Cottonwood Springs, Eagle Mountains. Northern Colorado Desert. Comment
  RSA75132A  Nemacladus tenuis var. tenuis F. W. Peirson 1920-2-16 4681 Riverside Palm Canyon, near below Palm Springs Comment
  RSA75132B  Nemacladus glanduliferus F. W. Peirson 1920-2-16 4681 Riverside Palm Canyon, near below Palm Springs Comment
  RSA75139  Nemacladus rubescens F. W. Peirson 1926-1-31 6486 Riverside About 2 miles from Dos Palmas on road to Mecca, Colorado Desert. Comment
  RSA75141  Nemacladus rubescens F. W. Peirson 1928-4-24 7914 Riverside Below Cottonwood Springs, Eagle Mountains. Northern Colorado Desert. Comment
  RSA75369  Camissonia brevipes subsp. brevipes F. W. Peirson 1928-7-10 7706 Riverside Colorado Desert. Foot of rock wall of canyon at Hidden Spring, northeast of Mecca. Comment
  RSA75371  Camissonia brevipes subsp. brevipes F. W. Peirson 1930-3-29 8686 Riverside Colorado Desert. Painted Canyon, near Mecca. Comment
  RSA75387  Camissonia cardiophylla F. W. Peirson 1930-3-29 8687 Riverside Painted canyon, near Mecca. Comment
  RSA75388  Camissonia cardiophylla F. W. Peirson 1917-4-1 787 Riverside Along south edge of Colorado Desert embayment east of Palm Springs, above ''Garden of Eden'. Comment
  RSA75398  Camissonia boothii subsp. condensata F. W. Peirson 1920-2-16 784 Riverside Colorado Desert. Garden of Eden east of Palm Springs. Comment
  RSA75404  Camissonia boothii subsp. condensata F. W. Peirson 1922-4-9 s.n. Riverside Palm Canyon Region, near Palm Springs. Comment
  RSA75413  Oenothera deltoides subsp. deltoides F. W. Peirson 1918-03 779 Riverside Irrigated field near Indio. Comment
  RSA75419  Oenothera deltoides subsp. deltoides F. W. Peirson 1922-4-6 782 Riverside Near the White Water Bridge, head of Coachella Valley. Comment
  RSA75431  Camissonia pallida subsp. pallida F. W. Peirson 1919-4-13 4699 Riverside Tahquitz Canyon, near Palm Springs. Comment
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Sep 18 2011
  RSA75432  Camissonia hirtella F. W. Peirson 1924-7-29 5022 Riverside Road between Banning and Idyllwild. 1768 Comment
  RSA75435  Camissonia pallida subsp. pallida F. W. Peirson 1919-4-13 786 Riverside Tahquitz Canyon stream, near Palm Springs. Comment
  RSA75503  Phacelia brachyloba F. W. Peirson 1924-7-29 5021 Riverside Road between Banning and Idyllwild. 1768 Comment
  RSA75520  Tricardia watsonii F. W. Peirson 1914-04 1715 Riverside Whitewater at head of Coachella Valley. Comment
  RSA75687  Camissonia refracta F. W. Peirson 1926-1-31 6492 Riverside Dos Palmas [Spring], Colorado Desert. Comment
  RSA75874  Nemophila menziesii F. W. Peirson 1929-5-4 8336 Riverside In open spaces along road, summit of St. John s Grade, south of Hemet. 793 Comment
  RSA75988  Eucrypta chrysanthemifolia var. bipinnatifida F. W. Peirson 1919-4-13 972 Riverside Tahquitz Canyon, near Palm Springs. Comment
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Sep 18 2011
  RSA76031  Pholistoma membranaceum F. W. Peirson 1919-4-13 981 Riverside Tahquitz Canyon stream, near Palm Springs. Comment
  RSA76032  Pholistoma membranaceum F. W. Peirson 1918-03 5304 Riverside Whitewater Grad, E of Beaumont. Comment
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Feb 3 2013
  RSA76033B  Simmondsia chinensis F. W. Peirson 1920-6-23 2806 Riverside Aguanga. 610 Comment
  RSA766144  Eriogonum thomasii F. W. Peirson 1930-3-29 1897 Riverside Painted Canyon Comment
  RSA76931  Euonymus occidentalis var. parishii F. W. Peirson 1924-7-27 4983 Riverside Dark Canyon, San Jacinto Mts. 1768 Comment
  RSA76934  Simmondsia chinensis F. W. Peirson 1919-4-13 2049 Riverside Murray Canyon, Palm Springs Region. 457 Comment
  RSA76937  Simmondsia chinensis F. W. Peirson 1920-12-29 8415 Riverside Point of Rocks, 1.5 miles east of Whitewater Station, head of Coachella Valley 335 Comment
  RSA76945  Rhus trilobata var. pilosissima F. W. Peirson 1928-3-24 7727 Riverside Large clumps along road up Temecula River, just north of Dripping Spring. 457 Comment
  RSA76953  Tetracoccus hallii F. W. Peirson 1928-4-24 7894 Riverside Cottonwood Springs, northern Colorado Desert Comment
  RSA76955  Stillingia linearifolia F. W. Peirson 1914-04 2045 Riverside Whitewater at head of Coachella Valley. Comment
  RSA76957  Stillingia linearifolia F. W. Peirson 1921-4-12 5311 Riverside Foot of Palm canyon. Comment
  RSA76960  Stillingia spinulosa F. W. Peirson 1921-4-12 2044 Riverside Near Indian Wells. Comment
  RSA76961  Stillingia spinulosa F. W. Peirson 1924-12-29 5403 Riverside Sand hill near Palm Springs RR Station. Comment
  RSA76967  Ziziphus parryi F. W. Peirson 1921-3-21 2370 Riverside Gordon Trail from Andreas Canyon, east base of the San Jacinto Mtns. 1067 Comment
  RSA76968  Ziziphus parryi F. W. Peirson 1922-4-9 2870 Riverside Andreas Canyon, Palm Springs Region. 366 Comment
  RSA77059  Loeseliastrum schottii F. W. Peirson 1914-04 953 Riverside Whitewater at head of Coachella Valley. Comment
  RSA77060  Loeseliastrum schottii F. W. Peirson 1926-2-22 6506 Riverside Thousand-Palms Canyon. 152 Comment
  RSA77071  Langloisia setosissima subsp. setosissima F. W. Peirson 1921-4-11 4475 Riverside Deep Canyon Wash, south side of Coachella Valley 244 Comment
  RSA77073  Langloisia setosissima subsp. setosissima F. W. Peirson 1926-2-22 6605 Riverside Thousand-Palms Canyon; Coachella Valley Comment
  RSA77075  Langloisia setosissima subsp. setosissima F. W. Peirson 1927-4-12 7177 Riverside Painted Canyon, near Mecca. Central part of Painted Canyon Comment
  RSA77076  Langloisia setosissima subsp. setosissima F. W. Peirson 1935-4-17 s.n. Riverside 30 miles north of Blythe. Comment
  RSA77086  Thamnosma montana F. W. Peirson 1918-03 2032 Riverside Whitewater at head of Coachella Valley. Comment
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Jan 14 2010
  RSA77146  Ceanothus greggii var. perplexans F. W. Peirson 1918-03 728 Riverside Jack Rabbit Grade, from Moreno to Beaumont Comment
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Mar 20 2011
  RSA77158  Ceanothus leucodermis F. W. Peirson 1914-04 730 Riverside Whitewater at head of Coachella Valley. Comment
  RSA77195  Eremalche rotundifolia F. W. Peirson 1921-04 2384 Riverside Deep Canyon Wash, south of Indio Comment
  RSA77199  Eremalche exilis F. W. Peirson 1914-04 2300 Riverside Whitewater at head of Coachella Valley. Comment
  RSA77201  Eremalche exilis F. W. Peirson 1917-4-1 2053 Riverside Andreas Canyon near Palm Springs. Comment
  RSA77211  Calochortus weedii var. weedii Frank W. Peirson 1920-6-22 2189 Riverside Dripping Spring southeast of Temecula 457 Comment
  RSA77214  Sphaeralcea ambigua subsp. rosacea F. W. Peirson 1933-4-13 10639 Riverside on road from Deep Canyon to Idyllwild, San Jacinto Mts. 762 Comment
  RSA77216  Sphaeralcea ambigua subsp. rosacea F. W. Peirson 1916-04 2067 Riverside Near Palm Springs. Comment
  RSA77217  Sphaeralcea ambigua subsp. rosacea F. W. Peirson 1922-4-9 2887 Riverside Palm Canyon Region, near Palm Springs. Comment
  RSA77226  Ayenia compacta F. W. Peirson 1922-4-9 9600 Riverside Andreas Canyon, Palm Springs region 457 Comment
  RSA77228  Ayenia compacta F. W. Peirson 1919-4-14 2069 Riverside Murray Canyon, near Palm Springs. Comment
  RSA77237  Eriodictyon crassifolium F. W. Peirson 1922-4-28 4480 Riverside Leach Canyon, near Elsinore 534 Comment
  RSA77238  Eriodictyon crassifolium F. W. Peirson 1921-3-22 990 Riverside Murray Canyon, Near Palm Springs. 366 Comment
  RSA77341  Ceanothus tomentosus var. olivaceus F. W. Peirson 1922-4-30 2941 Riverside St. John's Grade, Baustista Creek, south of Hemet. 762 Comment
  RSA77414  Brandegea bigelovii F. W. Peirson 1921-3-23 2387 Riverside Deep Canyon Wash, 12 miles southeast of Palm Springs. 152 Comment
  RSA77415  Brandegea bigelovii F. W. Peirson 1927-4-12 7166 Riverside In Painted Canyon near Mecca. Comment
  RSA77418  Cucurbita palmata F. W. Peirson 1916-04 1206 Riverside Near Palm Springs. Comment
  RSA77426  Petalonyx linearis F. W. Peirson 1921-3-23 2376 Riverside Deep Canyon south of Coachella Valley 335 Comment
  RSA77438  Angelica tomentosa F. W. Peirson 1924-7-29 5024 Riverside Open Mountain slope on road from Banning to Idyllwild, San Jacinto Mountains. 1677 Comment
  RSA77439  Angelica tomentosa F. W. Peirson 1924-7-29 5024 Riverside Open Mountain slope on road from Banning to Idyllwild, San Jacinto Mountains. 1677 Comment
  RSA77718  Ceanothus greggii var. perplexans F. W. Peirson 1922-5-20 735 Riverside Hemet Valley, San Jacinto Mountains 1448 Comment
  RSA77816  Pectocarya peninsularis F. W. Peirson 1920-2-16 1013 Riverside Palm Canyon stream below the canyon, Palm Springs. region Comment
  RSA77817  Pectocarya setosa F. W. Peirson 1921-3-21 4059 Riverside Gordon Trail from Andreas Canyon, east base of the San Jacinto Mtns. 1067 Comment
  RSA77820  Pectocarya platycarpa F. W. Peirson 1928-4-24 7908 Riverside Cottonwood Spring, west end of Eagle Mtns. Comment
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Oct 9 2010
  RSA77839  Larrea tridentata F. W. Peirson 1914-04 2027 Riverside Whitewater, Colorado Desert. Comment
  RSA77843  Fagonia laevis F. W. Peirson 1920-2-16 2029 Riverside Palm Canyon stream below the canyon, Palm Springs. region Comment
  RSA77844  Fagonia laevis F. W. Peirson 1932-3-22 9810 Riverside 20 miles North of Blythe on the road to Needles, Eastern Riverside. 152 Comment
  RSA77845  Fagonia pachyacantha F. W. Peirson 1922-4-12 2889 Riverside along boulevard, 18 mi. southeast of Coachella. Comment
  RSA77846  Callitriche marginata F. W. Peirson 1922-5-12 3067 Riverside South of Lake Elsinore. Comment
  RSA77862  Pectocarya platycarpa F. W. Peirson 1920-2-16 1014 Riverside Palm Canyon stream below the canyon, Palm Springs. region Comment
  RSA77863  Pectocarya peninsularis F. W. Peirson 1918-03 1018 Riverside Coachella Valley, field near Indio. Comment
  RSA77866  Pectocarya recurvata F. W. Peirson 1920-2-16 1012 Riverside Palm Canyon stream below the canyon, Palm Springs. region Comment
  RSA77873  Pectocarya heterocarpa F. W. Peirson 1935-4-17 11473 Riverside 30 miles north of Blythe. Comment
  RSA77874  Heliotropium curassavicum var. oculatum F. W. Peirson 1920-6-22 994 Riverside Temescal canyon 305 Comment
  RSA77887  Tiquilia palmeri F. W. Peirson 1926-2-22 5421 Riverside Thousand-Palms Canyon; Coachella Valley Comment
  RSA77888  Tiquilia palmeri F. W. Peirson 1930-3-29 8688 Riverside Colorado Desert. Painted Canyon, near Mecca. Comment
  RSA77889  Tiquilia palmeri F. W. Peirson 1927-4-12 7176 Riverside Painted Canyon, near Mecca Comment
  RSA77890  Tiquilia plicata F. W. Peirson 1914-04 992 a Riverside Whitewater east of Beaumont. Comment
  RSA79564  Cryptantha intermedia F. W. Peirson 1913-04 1023 Riverside Whitewater at head of Coachella Valley. Comment
  RSA79569  Cryptantha holoptera F. W. Peirson 1935-4-17 11475 Riverside 30 miles north of Blythe. Comment
  RSA79572  Cryptantha costata F. W. Peirson 1918-03 5798 Riverside Irrigated field near Indio. Comment
  RSA79575  Cryptantha holoptera F. W. Peirson 1927-4-12 7162 Riverside In Painted Canyon near Mecca. Comment
  RSA79588  Cryptantha angustifolia F. W. Peirson 1926-2-22 6508 Riverside Thousand-Palms Canyon; Coachella Valley Comment
  RSA79591  Cryptantha barbigera F. W. Peirson 1919-4-13 1026 Riverside Tahquitz Canyon, near Palm Springs. Comment
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Sep 18 2011
  RSA79596  Cryptantha barbigera F. W. Peirson 1928-3-10 7710 Riverside Near Hidden Spring, N of Salton Sea, Riverside County. Comment
  RSA79608  Cryptantha angustifolia F. W. Peirson 1928-3-10 7704 Riverside Flat areas where water had stood, near sand dunes W of Indio Comment
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Oct 23 2011
  RSA79623  Cryptantha utahensis F. W. Peirson 1919-4-13 1025 Riverside Murray Canyon, Palm Springs region. Comment
  RSA79775  Penstemon clevelandii subsp. connatus F. W. Peirson 1919-4-14 1106 Riverside Murray Canyon, Palm Springs Region. 457 Comment
  RSA79805  Penstemon californicus F. W. Peirson 1922-5-21 3048 Riverside Hemet Valley, San Jacinto Mts. 1372 Comment
  RSA79828  Keckiella antirrhinoides F. W. Peirson 1914-04 1105 Riverside Whitewater at head of Coachella Valley. Comment
  RSA79895  Physalis crassifolia F. W. Peirson 1921-3-20 4485 Riverside Andreas Canyon, near Palm Springs 244 Comment
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Oct 18 2007
  RSA79897  Physalis crassifolia F. W. Peirson 1922-4-8 1088 Riverside between Whitewater and Palm Springs. Comment
  RSA79959  Cryptantha micrantha var. lepida F. W. Peirson 1922-5-19 4483 Riverside San Jacinto River, San Jacinto Mtns. 1220 Comment
  RSA79960  Cryptantha micrantha var. micrantha F. W. Peirson 1920-2-16 s.n. Riverside Colorado Desert. Garden of Eden east of Palm Springs. Comment
  RSA80004  Amsinckia intermedia F. W. Peirson 1921-3-22 s.n. Riverside Murray Canyon, near Palm Springs 487 Comment
  RSA80057  Veronica peregrina subsp. xalapensis F. W. Peirson 1922-5-5 3032 Riverside On floor of Hemet Valley. 1372 Comment
  RSA80199  Plagiobothrys collinus var. ursinus F. W. Peirson 1922-5-19 3041 Riverside Hemet Valley, San Jacinto Mountains. 1341 Comment
  RSA80213  Plagiobothrys kingii F. W. Peirson 1922-4-29 2924 Riverside Field S of Lake Elsinore 375 Comment
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Dec 19 2018
  RSA80216  Plagiobothrys leptocladus F. W. Peirson 1922-4-29 4273 Riverside Field S of Lake Elsinore 375 Comment
  RSA80248  Mohavea confertiflora F. W. Peirson 1917-4-1 1102 Riverside Along south edge of Colorado Desert embayment east of Palm Springs, above ''Garden of Eden'. Comment
  RSA80251  Mohavea confertiflora F. W. Peirson 1928-3-10 7708 Riverside Hidden Spring, northern Colorado Desert. Comment
  RSA80303  Lycium torreyi F. W. Peirson 1916-4-1 1087 Riverside Palm Springs region, head of Coachella Valley. Comment
  RSA80305  Lycium fremontii F. W. Peirson 1927-4-12 7157 Riverside East branch of Painted Canyon, near Mecca. Comment
  RSA80322  Orthocarpus densiflorus var. gracilis F. W. Peirson 1930-5-10 8776 Riverside Summit St John's Grade., south of Hemet. 762 Comment
  RSA80331  Lycium andersonii F. W. Peirson 1922-4-29 1084 Riverside Aguanga, western Riverside Co. 610 Comment
  RSA80345  Lycium brevipes F. W. Peirson 1926-1-31 6493 Riverside Dos Palmas, Colorado Desert. Comment
  RSA80380  Solanum umbelliferum F. W. Peirson 1918-03 1080 Riverside Moreno. Comment
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Mar 20 2011
  RSA80383  Solanum umbelliferum F. W. Peirson 1922-4-29 4487 Riverside Leach Canyon. (base of Santa Ana Mts., near Elsinore) 534 Comment
  RSA80394  Daucus pusillus F. W. Peirson 1921-3-22 2379 Riverside Murray Canyon near Palm Springs. 457 Comment
  RSA80435  Antirrhinum filipes F. W. Peirson 1920-2-16 1101 Riverside Palm Canyon stream below the canyon, Palm Springs. region Comment
  RSA80440  Mimulus fremontii var. fremontii F. W. Peirson 1920-6-22 4723 Riverside Temescal canyon, western Riverside Co. 305 Comment
  RSA80472  Mimulus latidens F. W. Peirson 1922-5-19 3043 Riverside Menifee Valley (South of Perris) 427 Comment
  RSA80482  Mimulus diffusus F. W. Peirson 1922-4-30 2934 Riverside hills south of Tucalota Creek, below summit to St. Johns grade, road from Hemet to Aguanga Comment
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May 29 2011
  RSA80634  Epilobium densiflorum F. W. Peirson 1924-7-29 5033 Riverside Banning to Idyllwild road, San Jacinto Mountains. 1570 Comment
  RSA80646  Epilobium pygmaeum F. W. Peirson 1922-5-19 4112 Riverside Menifee Valley, near Murrieta. 427 Comment
  RSA80685  Oligomeris linifolia F. W. Peirson 1927-4-12 7161 Riverside Painted canyon, near Mecca. Comment
  RSA80731  Nicotiana clevelandii F. W. Peirson 1928-3-10 7709 Riverside Along sides of main canyon near Hidden Springs, northeast of Mecca. Comment
  RSA80734  Nicotiana clevelandii F. W. Peirson 1926-2-22 6511 Riverside Thousand Palm Canyon, northwest end of Coachella Valley. 122 Comment
  RSA80738  Cryptantha maritima F. W. Peirson 1927-4-12 7172 Riverside Painted Canyon, near Mecca Comment
  RSA80739  Cryptantha maritima F. W. Peirson 1935-4-17 11474 Riverside 30 miles north of Blythe. Comment
  RSA80741  Cryptantha maritima F. W. Peirson 1919-4-13 1027 Riverside first canyon east of Palm Canyon, Palm Springs region. Comment
  RSA80747  Cryptantha racemosa F. W. Peirson 1921-3-23 2377 Riverside Deep Canyon south of Coachella Valley 335 Comment
  RSA80749  Cryptantha racemosa F. W. Peirson 1927-4-12 7170 Riverside Painted Canyon, near Mecca Comment
  RSA80751  Cryptantha racemosa F. W. Peirson 1920-2-16 4718 Riverside Foot of Alkali Canyon, southeast of Palm Canyon, Coachella Valley. Comment
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Aug 30 2011
  RSA80819  Frankenia grandifolia F. W. Peirson 1924-6-21 4761 Riverside Alkaline flat near Lake Elsinore near south end 375 Comment
  RSA80830  Pedicularis densiflora F. W. Peirson 1921-3-19 2741 Riverside 4 miles west of Beaumont, on road to Redlands. Comment
  RSA81010  Fouquieria splendens F. W. Peirson 1921-3-23 2391 Riverside Deep canyon wash, south of Coachella Valley Comment
  RSA82009  Justicia californica F. W. Peirson 1916-04 1172 Riverside abundant about mouth of Tahquitz Canyon, Palm Springs. Comment
  RSA82107  Mimulus aurantiacus var. puniceus F. W. Peirson 1925-5-20 6014 Riverside 1 mile northwest of Dripping Spring, east of Temecula. 457 Comment
  RSA82119  Orobanche cooperi subsp. cooperi F. W. Peirson 1930-3-29 8692 Riverside At foot of Painted Canyon, lower Coachella Valley. Comment
  RSA82215  Verbena bracteata F. W. Peirson 1935-4-17 11477 Riverside 30 miles north of Blythe. Comment
  RSA82229  Castilleja affinis F. W. Peirson 1929-5-4 8338 Riverside Mostly about bushes on low hill about 2 miles south of summit of St. Johns Grade south of Hemet. 701 Comment
  RSA82388  Salvia vaseyi F. W. Peirson 1933-4-13 10635 Riverside Deep Canyon to Santa Rosa Mts. road 488 Comment
  RSA82389  Salvia vaseyi F. W. Peirson 1930-6-1 8930 Riverside Morongo Canyon, head of Coachella Valley. 610 Comment
  RSA82390  Salvia vaseyi F. W. Peirson 1922-12-27 4060 Riverside On rough mountain slope between two forks of Andreas Canyon, near Palm Springs 610 Comment
  RSA82425  Salvia eremostachya F. W. Peirson 1933-4-13 10643 Riverside Deep Canyon to Idyllwild, Santa Rosa Mountains 1372 Comment
  RSA82479  Chilopsis linearis subsp. arcuata F. W. Peirson 1921-4-13 1173 Riverside Deep Canyon; north base of Santa Rosa Mountains, Riverside. 335 Comment
  RSA82521  Limosella acaulis F. W. Peirson 1922-5-20 3054 Riverside Hemet Valley. (San Jacinto Mountains) 1341 Comment
  RSA82524  Stemodia durantifolia F. W. Peirson 1919-4-14 991 Riverside Murray Canyon near Palm Springs 381 Comment
  RSA82573  Stachys stebbinsii F. W. Peirson 1924-7-27 4994 Riverside Deer Springs, San Jacinto Mtns. 2668 Comment
  RSA82574  Stachys rigida subsp. quercetorum F. W. Peirson 1924-6-21 4759 Riverside Temescal Canyon. 290 Comment
  RSA83383  Dudleya saxosa subsp. aloides F. W. Peirson 1928-4-24 7895 Riverside Below Cottonwood Spring, northern edge of Colorado Desert. Comment
  RSA83412  Monardella australis subsp. australis F. W. Peirson 1924-7-27 4993 Riverside Near lower part of Deer Springs, Dark Canyon, San Jacinto Mts. 2591 Comment
  RSA83427  Monardella nana subsp. tenuiflora F. W. Peirson 1924-7-27 4990 Riverside San Jacinto Mountains: Dark Canyon. 2226 Comment
  RSA83467  Hyptis emoryi F. W. Peirson 1919-4-13 1078 Riverside first canyon east of Palm Canyon, Palm Springs region. Comment
  RSA83468  Hyptis emoryi F. W. Peirson 1916-04 1079 Riverside Near Palm Springs. Comment
  RSA84261  Azolla filiculoides Frank W. Peirson 1922-4-30 2948 Riverside Lancaster Valley, less than 2 miles from the Temecula River on the road to Hemet. 518 Comment
  RSA84385  Lithophragma affine subsp. mixtum F. W. Peirson 1922-5-19 4189 Riverside San Jacinto River. 1143 Comment
  RSA84404  Jepsonia parryi F. W. Peirson 1922-12-27 3337 Riverside Between forks of Andreas Canyon, near Palm Springs 609 Comment
  RSA84468  Clematis pauciflora F. W. Peirson 1921-3-22 s.n. Riverside Murray Canyon, near Palm Springs 427 Comment
  RSA84521  Philadelphus microphyllus subsp. pumilus F. W. Peirson 1924-7-27 4991 Riverside Low divaricate bush on rocks, Dark Canyon, San Jacinto Mts, Riverside County 2287 Comment
  RSA84907  Crassula solieri F. W. Peirson 1922-4-29 2944 Riverside mud flat south of Lake Elsinore Comment
  RSA84912  Crassula connata F. W. Peirson 1920-2-16 1935 Riverside Palm Canyon stream below the canyon, Palm Springs. region Comment
  RSA84991  Adiantum capillus-veneris F. W. Peirson 1919-4-13 1521 Riverside First canyon east of Palm Canyon, Palm Springs region. Comment
  RSA85057  Ephedra aspera F. W. Peirson 1922-4-9 3339 Riverside Andreas Canyon near Palm Springs. 426 Comment
  RSA85062  Adenostoma sparsifolium F. W. Peirson 1907-04 693 Riverside road below Strawberry valley. Comment
  RSA85070  Crossosoma bigelovii F. W. Peirson 1921-3-21 2808 Riverside Gordon Trail from Andreas Canyon, east base of the San Jacinto Mtns. 1067 Comment
  RSA85071  Crossosoma bigelovii F. W. Peirson 1920-2-15 1953 Riverside Small canyon north of Tahquitz Canyon, east base of San Jacinto Mtns. Comment
  RSA85072  Crossosoma bigelovii F. W. Peirson 1935-2-22 11402 Riverside Side canyon opening at the foot of the road from Deep Canyon to Idyllwild, north base of the Santa Rosa Mtns. 366 Comment
  RSA85074  Crossosoma bigelovii F. W. Peirson 1933-4-15 10653 Riverside Whitewater River E of Cabezon, 4.5 mi. up stream from Hwy. 701 Comment
  RSA85169  Ephedra californica F. W. Peirson 1925-4-17 6021 Riverside Cabazon, San Gorgonio Pass. Comment
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Mar 13 2011
  RSA85174  Ephedra trifurca F. W. Peirson 1938-4-10 12378 Riverside Near banks of Colorado River, 12-15 miles north of Blythe. Comment
  RSA85180  Ephedra fasciculata F. W. Peirson 1928-4-24 7904 Riverside Cottonwood Spring, west end of Eagle Mtns. Comment
  RSA85183  Ephedra viridis F. W. Peirson 1933-4-13 10641 Riverside Road from Deep Canyon south of Indio to Idyllwild 1220 Comment
  RSA85232  Horkelia clevelandii F. W. Peirson 1924-7-29 5255 Riverside Banning to Idyllwild road, San Jacinto Mountains. 1570 Comment
  RSA85233  Horkelia clevelandii F. W. Peirson 1924-7-28 5006 Riverside Pine Flats on road from Banning to Idyllwild 1799 Comment
  RSA85537  Cheilanthes covillei F. W. Peirson 1922-4-10 s.n. Riverside Murray Canyon, Palm Springs Region. 457 Comment
  RSA85538  Cheilanthes viscida F. W. Peirson 1922-12-27 4295 Riverside On rough mountain slope between two forks of Andreas Canyon, near Palm Springs 609 Comment
  RSA85545  Cheilanthes viscida F. W. Peirson 1921-3-22 2371 Riverside Murray Canyon, south side in canyon 457 Comment
  RSA85548  Cheilanthes covillei F. W. Peirson 1928-11-30 8213 Riverside about 1 mile north of Cottonwood Spring, northeast of Mecca. Comment
  RSA85555  Cheilanthes covillei F. W. Peirson 1921-3-22 2331 Riverside Murray Canyon near Palm Springs. 488 Comment
  RSA85564  Potamogeton pusillus F. W. Peirson 1922-5-21 4116 Riverside Thomas Ranch, Hemet Valley, San Jacinto Mtns. 1338 Comment
  RSA85825  Cupressus forbesii F. W. Peirson 1922-5-28 3058 Riverside Canyon floor in canyon east from Santa Ana River Canyon. at 400 ft. 121 Comment
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Feb 28 2013
  RSA85835  Marsilea vestita F. W. Peirson 1930-5-10 8768 Riverside along the boulevard opposite March Field, south of Riverside 457 Comment
  RSA85840  Marsilea vestita F. W. Peirson 1922-4-29 2937 Riverside mud flat south of Lake Elsinore Comment
  RSA85863  Notholaena californica subsp. californica F. W. Peirson 1922-5-21 3053 Riverside about 4 miles north of San Jacinto 457 Comment
  RSA85864  Cheilanthes newberryi F. W. Peirson 1922-4-30 2929 Riverside foot of St Johns Grade, south of Hemet Comment
  RSA85931  Pilularia americana F. W. Peirson 1922-4-29 2922 Riverside South of Lake Elsinore. 381 Comment
  RSA85934  Selaginella bigelovii Frank W. Peirson 1920-2-15 1530 Riverside Murray Canyon near Palm Springs Comment
  RSA85940  Selaginella eremophila Frank W. Peirson 1920-2-15 1531 Riverside Tahquitz Canyon near Palm Springs Comment
  RSA85942  Selaginella bigelovii Frank W. Peirson 1921-3-22 s.n. Riverside Murray Canyon, near Palm Springs 487 Comment
  RSA85943  Selaginella eremophila Frank W. Peirson 1920-12-28 s.n. Riverside Murray Canyon, near Palm Springs 304 Comment
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May 4 2007
  RSA86207  Notholaena californica subsp. leucophylla F. W. Peirson 1921-3-20 1503 Riverside Andreas Canyon, near Palm Springs. 243 Comment
  RSA86209  Cheilanthes parryi F. W. Peirson 1920-12-28 1504 Riverside Murray Canyon, near Palm Springs 304 Comment
  RSA86299  Potentilla rimicola F. W. Peirson 1924-7-27 5000 Riverside Pinnacle 0.5 miles west of Deer Spring 2439 Comment
  RSA86343  Juniperus californica F. W. Peirson 1922-12-27 3332 Riverside Between forks of Andreas Canyon, near Palm Springs 609 Comment
  RSA86362  Pinus quadrifolia F. W. Peirson 1922-5-20 3059 Riverside Hemet Valley, San Jacinto Mts. 1494 Comment
  RSA86651  Purshia tridentata var. glandulosa F. W. Peirson 1933-4-13 10645 Riverside Between Deep Canyon and Idylwild. 1524 Comment
  RSA86676  Cercocarpus minutiflorus F. W. Peirson 1921-3-21 4191 Riverside Gordon Trail. 1372 Comment
  RSA86722  Aristida adscensionis var. abortiva F. W. Peirson 1921-3-23 2374 Riverside Deep Canyon south of Coachella Valley 335 Comment
  RSA86763  Deschampsia danthonioides var. gracilis F. W. Peirson 1922-5-19 3022 Riverside 10 miles northeast of Murrieta. Comment
  RSA86856  Prunus fremontii F. W. Peirson 1917-4-1 1986 Riverside Fruiting specimen from Tahquitz Canyon, Palm Springs region. Comment
  RSA86861  Prunus fasciculata F. W. Peirson 1928-4-24 7915 Riverside Plateau land west of Cottonwood Springs, northeast of mecca. Comment
  RSA86945  Lupinus arizonicus F. W. Peirson 1921-4-13 2497 Riverside Deep Canyon, about 12 miles southeast of Palm Springs. 274 Comment
  RSA86946  Lupinus arizonicus F. W. Peirson 1920-3-16 703 Riverside Sandy places opposite mouth of Andreas Canyon, Southwest of Palm Springs. Comment
  RSA86947  Lupinus arizonicus F. W. Peirson 1935-4-17 11472 Riverside 25 miles north of Blythe, eastern Riverside. Comment
  RSA86961  Lupinus concinnus subsp. concinnus F. W. Peirson 1922-4-30 s.n. Riverside Near summit of St. Johns Grade, south of Hemet. Comment
  RSA86973  Lupinus sparsiflorus subsp. sparsiflorus F. W. Peirson 1921-3-19 7717 Riverside Whitewater Grade about 2 miles east of Banning Comment
  RSA86976  Prosopis pubescens F. W. Peirson 1920-12-29 2338 Riverside Andreas Canyon near Palm Springs 244 Comment
  RSA86985  Cercidium floridum F. W. Peirson 1921-4-13 sn Riverside Deep Canyon Wash, about 12 miles SE of Palm Springs. 152 Comment
  RSA86993  Prosopis glandulosa var. torreyana F. W. Peirson 1919-4-12 4429 Riverside Palm Canyon, near Palm springs. Comment
  RSA86994  Cercidium floridum F. W. Peirson 1919-4-15 575 Riverside Large tree near road to Palm Canyon from Palm Springs. Comment
  RSA86998  Caesalpinia virgata F. W. Peirson 1930-3-1 8691 Riverside Open desert at foot of Painted Canyon, near Mecca. Comment
  RSA86999  Caesalpinia virgata F. W. Peirson 1917-4-1 s.n Riverside Along south edge of Colorado Desert embayment east of Palm Springs, above ''Garden of Eden'. Comment
  RSA87000  Caesalpinia virgata F. W. Peirson 1922-4-11 4426 Riverside Deep Canyon Wash, south side of Coachella Valley 274 Comment
  RSA87018  Acacia greggii var. arizonica F. W. Peirson 1916-04 1996 Riverside Near Palm Springs. Comment
  RSA87019  Acacia greggii var. arizonica F. W. Peirson 1921-4-11 4066 Riverside Murray Canyon. Palm Springs region. Comment
  RSA87020  Prosopis glandulosa var. torreyana F. W. Peirson 1914-04 1995 Riverside Whitewater at head of Coachella Valley. Comment
  RSA87021  Prosopis glandulosa var. torreyana F. W. Peirson 1920-6-22 4068 Riverside Temescal Canyon north of Elsinore 290 Comment
  RSA87025  Lupinus microcarpus var. densiflorus F. W. Peirson 1914-04 705 Riverside Whitewater at head of Coachella Valley. Comment
  RSA87035  Lupinus shockleyi F. W. Peirson 1922-4-18 2434 Riverside Whitewater River, head of Coachella Valley, Riverside County Comment
  RSA87043  Lupinus arizonicus F. W. Peirson 1916-04 542 Riverside Region of Palm Springs. Comment
  RSA87055  Lupinus densiflorus var. lacteus F. W. Peirson 1922-4-29 4224 Riverside Dripping Spring, Temecula River, southwestern Riverside Co. 457 Comment
  RSA87061  Hordeum brachyantherum F. W. Peirson 1922-5-18 4336 Riverside Temescal Canyon 320 Comment
  RSA87084  Lupinus brevior F. W. Peirson 1922-4-9 2894 Riverside near Palm Canyon stream about 0.5 mile below mouth of Canyon, Palm Springs region Comment
  RSA87095  Lupinus pallidus F. W. Peirson 1922-4-9 s.n. Riverside Palm Canyon region, head of Coachella Valley Comment
  RSA87096  Lupinus concinnus subsp. optatus F. W. Peirson 1938-5-30 s.n. Riverside Thomas Mountain, Hemet Valley. 1402 Comment
  RSA87098  Lupinus bicolor F. W. Peirson 1921-3-19 91 Riverside 2 miles east of Banning on road to Indio, Riverside Comment
  RSA87101  Lupinus bicolor subsp. tridentatus F. W. Peirson 1922-5-18 3064 Riverside Keene Camp, San Jacinto Mts., Riverside county. 1463 Comment
  RSA87112  Galium angustifolium subsp. angustifolium F. W. Peirson 1920-6-22 4500 Riverside Dripping Springs, Temecula River 457 Comment
  RSA87136  Leptochloa fusca subsp. uninervia F. W. Peirson 1924-12-30 5404 Riverside Thousand-Palms Canyon, north side of Coachella Valley. 122 Comment
  RSA87149  Quercus palmeri F. W. Peirson 1922-5-20 3016 Riverside Upper end of Hemet Valley 1463 Comment
  RSA87193  Lupinus excubitus var. austromontanus F. W. Peirson 1938-5-30 12411 Riverside Thomas Mountain, Hemet Valley. 1402 Comment
  RSA87356  Muhlenbergia microsperma F. W. Peirson 1921-3-22 4323 Riverside Andreas Canyon, Palm Springs region Comment
  RSA87376  Agrostis scabra F. W. Peirson 1924-7-27 4982 Riverside Dark Canyon, San Jacinto Mountains. 1768 Comment
  RSA87459  Lupinus concinnus subsp. optatus F. W. Peirson 1922-5-19 7721 Riverside Road to Keenes Camp, San Jacinto Mts. Comment
  RSA88679  Carex lemmonii F. W. Peirson 1924-7-27 6024 Riverside Deer Spring, Dark Canyon, San Jacinto Mountains. 2439 Comment
  RSA88858  Carex praegracilis F. W. Peirson 1922-5-20 3062 Riverside Hemet Valley, San Jacinto Mountains. 1371 Comment
  RSA90167  Astragalus lentiginosus var. coachellae F. W. Peirson 1920-12-29 585 Riverside Whitewater, at head of Coachella Valley. Comment
  RSA90306  Lotus rigidus F. W. Peirson 1919-4-14 712 Riverside Murray Canyon, near Palm Springs. Comment
  RSA90697  Gutierrezia californica F. W. Peirson 1920-12-28 5298 Riverside Murray Canyon near Palm Springs Comment
  RSA91096  Trifolium variegatum F. W. Peirson 1919-4-14 561 Riverside Murray Canyon, near Palm Springs. Comment
  RSA91284  Isocoma acradenia var. eremophila F. W. Peirson 1920-12-28 2335 Riverside Murray Canyon near Palm Springs Comment
  RSA92097  Carex nebrascensis F. W. Peirson 1924-7-27 5002 Riverside South side of Dark Canyon, San Jacinto Mountains. 2499 Comment
  RSA92258  Layia platyglossa F. W. Peirson 1922-5-19 3042 Riverside Hemet Valley, San Jacinto Mountains. 1341 Comment
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Dec 16 2012
  RSA92259  Layia platyglossa subsp. campestris F. W. Peirson 1919-4-15 2575 Riverside Whitewater Grade near Cabazon 549 Comment
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Mar 13 2011
  RSA92398  Bebbia juncea F. W. Peirson 1920-12-28 5282 Riverside Murray Canyon near Palm Springs Comment
  RSA92898  Parietaria hespera var. hespera F. W. Peirson 1920-2-15 1714 Riverside Tahquitz Canyon near Palm Springs Comment
  RSA92916  Eriophyllum ambiguum var. paleaceum F. W. Peirson 1919-4-13 1372 Riverside Tahquitz Canyon, near Palm Springs. Comment
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Sep 18 2011
  RSA93115  Corethrogyne filaginifolia F. W. Peirson 1928-9-6 8206 Riverside 1 mile W of Cabazon, San Gorgonio Pass Comment
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Mar 13 2011
  RSA93159  Baccharis sergiloides F. W. Peirson 1920-12-28 1295 Riverside Murray Canyon near Palm Springs Comment
  RSA93244  Chrysothamnus paniculatus F. W. Peirson 1922-12-26 3331 Riverside Whitewater Grade, near Cabazon Comment
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Mar 13 2011
  RSA93342  Xylorhiza tortifolia F. W. Peirson 1928-4-24 7898 Riverside Cottonwood Springs, northern Colorado Desert Comment
  RSA93726  Pleurocoronis pluriseta F. W. Peirson 1919-4-13 1213 Riverside Tahquitz Canyon, near Palm Springs. Comment
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Sep 18 2011
  RSA93729  Trichocoronis wrightii var. wrightii F. W. Peirson 1922-5-21 3049 Riverside near foot of Jack Rabbit Grade. (south of Moreno) 427 Comment
  RSA93902  Encelia actoni F. W. Peirson 1928-4-24 7891 Riverside Cottonwood Springs, northern Colorado Desert Comment
  RSA94144  Hulsea vestita subsp. callicarpha F. W. Peirson 1924-7-27 5005 Riverside Upper Dark Canyon, Deer Springs region, San Jacinto Mts. 2590 Comment
  RSA94385  Dyssodia porophylloides F. W. Peirson 1919-4-14 1411 Riverside Murray Canyon, Palm Springs Region. 457 Comment
  RSA94395  Chaenactis stevioides F. W. Peirson 1928-4-24 7905 Riverside Cottonwood Springs, northern Colorado Desert Comment
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Oct 9 2010
  RSA94829  Trixis californica F. W. Peirson 1919-4-14 1463 Riverside Murray Canyon, near Palm Springs. Comment
  RSA95070  Rafinesquia californica F. W. Peirson 1919-4-14 2763 Riverside Murray Canyon, Palm Springs Region. 457 Comment
  RSA95209  Stephanomeria exigua subsp. exigua F. W. Peirson 1922-12-26 3330 Riverside Whitewater Grade, near Cabazon Comment
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Mar 13 2011
  RSA95318  Sphaeralcea ambigua subsp. ambigua F. W. Peirson 1928-4-24 7892 Riverside Cottonwood Springs, northern Colorado Desert Comment
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Oct 9 2010
  RSA97439  Phoradendron californicum F. W. Peirson 1920-12-28 1719 Riverside Murray Canyon near Palm Springs Comment
  SBBG27953  Chorizanthe corrugata F. W. Peirson 1927-4-12 7175 Riverside near fork of Painted Cyn near Mecca Comment
  SBBG28232  Eriogonum thomasii F. W. Peirson 1927-4-12 7171 Riverside Painted Cyn, near Mecca Comment
  SBBG29172  Trixis californica var. californica F. W. Peirson 1920-2-16 Riverside Murray Cyn, near Palm Springs Comment
  SBBG29999  Atriplex polycarpa F. W. Peirson 1917-4-1 1812 Riverside Palm Springs Comment
  SBBG54433  Sphaeralcea ambigua F. W. Peirson 1933-4-13 10639 Riverside rd from Deep Cyn to Idyllwild 762 Comment
  SBBG98295  Baileya pauciradiata F. W. Peirson 1921-4-12 2775 Riverside Indian Wells Comment
  SD67591  Atriplex lentiformis F. W. Peirson 1924-12-30 5413 Riverside Thousand Palms Canyon, Coachella Valley. Comment
  SD87554  Cuscuta campestris Frank W. Peirson 1932-11-26 9659 Riverside Just south of Palm Grove, 1000 Palms. 120 Comment
  SD87599  Senecio mohavensis F. W. Peirson 1921-3-22 2378 Riverside Murray CaA'on near Palm Springs. 455 Comment
  SD87602  Astragalus palmeri F. W. Peirson 1921-3-23 4752 Riverside Santa Rosa Mountains, Deep Canyon 334 Comment
  SD87604  Astragalus palmeri F. W. Peirson 1921-3-21 4751 Riverside Gordon Trail, Palm Canyon to San Jacinto Mountains 1220 Comment
  SD87606  Malacothamnus densiflorus F. W. Peirson 1920-6-22 2189 Riverside Temecula River. 456 Comment
  SD87621  Astragalus nuttallianus var. imperfectus Frank W. Peirson 1922-4-9 584 Riverside Murray Canyon, near Palm Springs. Comment
  SD87635  Navarretia intertexta Frank W. Peirson 1922-5-19 4141 Riverside Five miles northeast of Murrieta on road to Perris Comment
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Nov 19 2011
  SD87651  Cryptantha utahensis F. W. Peirson 1919-4-13 1025 Riverside Murray Canyon Comment
  SD87675  Deinandra kelloggii F. W. Peirson 1924-6-21 Riverside Temescal Canyon. Comment
  SD87688  Petalonyx linearis F. W. Peirson 1921-3-23 2376 Riverside Deep CaA'on east of Palm Springs. 334 Comment
  SD87727  Dicoria canescens F. W. Peirson 1920-12-29 Riverside 1.5 miles east of Whitewater Comment
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Aug 21 2007
  SD87729  Encelia actoni Frank W. Peirson 1928-4-24 7891 Riverside Cottonwood Spring. Comment
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Oct 9 2010
  SD87749  Eleocharis geniculata F. W. Peirson 1924-12-30 5408 Riverside 1000 Palms Canon Comment
  SD87753  Myriopteris covillei Frank W. Peirson 1921-3-22 2331 Riverside Murray CaA'on Comment
  SD87784  Atriplex polycarpa Frank W. Peirson 1927-11-25 7678 Riverside 1000-Palm Canyon. 120 Comment
  SD87786  Atriplex hymenelytra F. W. Peirson 1924-12-30 5415 Riverside 1000 Palms Canon Comment
  SD87790  Selaginella bigelovii F. W. Peirson 1920-2-15 1530 Riverside Murray CaA'on Comment
  SD87813  Cryptantha maritima Frank W. Peirson 1935-4-17 11474 Riverside 30 miles north of Blythe on small alluvial flat along the Colorado River Comment
  SD87822  Pectocarya heterocarpa Frank W. Peirson 1935-4-17 Riverside 30 miles north of Blythe in small alluvial flat along the Colorado River Comment
  UC1076215  Tidestromia oblongifolia Frank W. Peirson 1924-12-30 5416 Riverside 1000 Palm Canyon 121 Comment
  UC1099771  Juncus bufonius var. occidentalis Frank W. Peirson 1922-4-29 2928 Riverside s side Lake Elsinore Comment
  UC483076  Salix laevigata Frank W. Peirson 1928-3-10 7700 Riverside Snow Creek Auto Camp Whitewater Comment
  UC483079  Salix exigua Frank W. Peirson 1924-12-30 5410 Riverside 1000-Palm Canyon Colorado Desert, 1000-Palm Canyon 121 Comment
  UC501449  Monoptilon bellioides Frank W. Peirson 1927-4-24 7899 Riverside Cottonwood Spring Comment
Read comments
Oct 9 2010
  UC501453  Amsonia tomentosa Frank W. Peirson 1928-4-25 7921 Riverside ca. 10 mi. s. 29 Palms (White Tank Region); White Tank Region Comment
  UC501500  Dicoria canescens Frank W. Peirson 1924-12-30 5425 Riverside 1000 Palms Canyon 121 Comment
  UC501502  Chimaphila umbellata Frank W. Peirson 1924-7-27 5004 Riverside 1 mi. w. Deer Spring; San Jacinto Mts. 2438 Comment
  UC501518  Tidestromia oblongifolia Frank W. Peirson 1924-12-30 5416 Riverside 1000-Palms. North of the Palm Grove. 121 Comment
  UC501576  Dalea mollis Frank W. Peirson 1932-3-22 9811 Riverside 20 mi. n. Blythe (on the Needles Rd.) Comment
  UC501578  Lotus argophyllus var. argophyllus Frank W. Peirson 1922-4-30 2933 Riverside St. John's Grade 762 Comment
  UC501587  Muilla maritima Frank W. Peirson 1922-4-29 2942 Riverside 2 mi s Lake Elsinore (along boulevard) 365 Comment
  UC501618  Brodiaea filifolia Frank W. Peirson 1930-5-10 8772 Riverside 1 mi E of Perris 457 Comment
  UC501622  Dicentra chrysantha Frank W. Peirson 1924-7-29 5025 Riverside Banning-Idyllwild Road; San Jacinto Mts. 1767 Comment
  UC501623  Baccharis sergiloides Frank W. Peirson 1928-9-6 8205 Riverside Morongo Canyon 609 Comment
  UC501636  Triodanis biflora Frank W. Peirson 1926-5-2 6723 Riverside grade n Dripping Spring; n of Dripping Spring 426 Comment
  UC511757  Phacelia distans Frank W. Peirson 1922-4-9 956 Riverside canyon bottom Murray Canyon (near end of road) 304 Comment
  UC511759  Phacelia campanularia subsp. campanularia Frank W. Peirson 1926-2-22 6499 Riverside talus slope at e end Bridge over Whitewater River Comment
  UC511829  Salvia vaseyi Frank W. Peirson 1933-4-13 10635 Riverside road from Deep Canyon to Idyllwild 487 Comment
  UC511830  Eriogonum elongatum var. elongatum Frank W. Peirson 1933-4-15 10651 Riverside 4 1/2 mi above the bridge; Whitewater River 701 Comment
  UC511831  Forestiera pubescens Frank W. Peirson 1933-4-13 10647 Riverside road from Deep Canyon to Idyllwild (at Palm Creek crossing) 1386 Comment
  UC511832  Salvia eremostachya Frank W. Peirson 1933-4-13 10643 Riverside road from Deep Canyon to Idyllwild 1371 Comment
  UC511833  Sphaeralcea ambigua var. rosacea Frank W. Peirson 1933-4-13 10639 Riverside road from Deep Canyon to Idlewild 762 Comment
  UC511835  Garrya flavescens Frank W. Peirson 1933-4-13 10644 Riverside road from Deep Canyon to Idyllwild 1524 Comment
  UC511836  Purshia tridentata var. glandulosa Frank W. Peirson 1933-4-13 10645 Riverside road from Deep Canyon to Idyllwild 1524 Comment
  UC511837  Baccharis salicifolia subsp. salicifolia Frank W. Peirson 1933-4-15 10654 Riverside 4 1/2 mi above bridge; Whitewater River 701 Comment
  UC511880  Crossosoma bigelovii Frank W. Peirson 1933-4-15 10653 Riverside 4 1/2 mi above bridge; Whitewater River 701 Comment
  UC511896  Eriophyllum ambiguum var. paleaceum Frank W. Peirson 1933-4-13 10638 Riverside road from Deep Canyon to Idlewild 762 Comment
  UC511923  Phacelia ivesiana var. pediculoides Frank W. Peirson 1922-4-12 2856 Riverside 15 mi se Coachella (along the boulevard) Comment
  UC555398  Caesalpinia virgata Frank W. Peirson 1920-2-16 1993 Riverside near foot Palm Canyon Comment
  UC555405  Lotus rigidus Frank W. Peirson 1922-4-9 Riverside Andreas Canyon Comment
  UC566729  Trichoptilium incisum Frank W. Peirson 1920-2-16 Riverside Andreas Canyon Region Colorado Desert Comment
  UC566794  Lomatium utriculatum Frank W. Peirson Apr 29 1922-May 18 1922 2932 Riverside roadside s. lake Elsinore Comment
  UC566919  Eustoma exaltatum Frank W. Peirson 1924-12-30 5419 Riverside 1000-Palm Canyon 121 Comment
  UC570561  Hymenoxys odorata Frank W. Peirson 1935-4-17 11468 Riverside 20 mi s Blythe Comment
  UC570587  Hoffmannseggia glauca Frank W. Peirson 1935-4-17 11469 Riverside 9 mi s Blythe Comment
  UC570588  Sisymbrium irio Frank W. Peirson 1935-4-17 11470 Riverside Blythe, along main street of the town and exactly opposite the High School Blythe Comment
  UC599196  Polygonum argyrocoleon Frank W. Peirson 1938-4-10 12379 Riverside 1-2 mi w Blythe (in ditch on roadside) Comment
  UC634597  Eriogonum thomasii Frank W. Peirson 1927-4-12 7171 Riverside foot of Painted Canyon Painted Canyon Comment
  UC635494  Calandrinia ambigua Frank W. Peirson 1926-2-22 6512 Riverside rocky hills along summits 1000-Palm Canyon 152 Comment
  UC640230  Pectis papposa var. papposa Frank W. Peirson 1938-11-12 12636 Riverside directly opposite the road from Mecca (Imperial Valley Boulevard); Imperial Valley Boulevard 0 Comment
  UC672284  Xylorhiza cognata Frank W. Peirson 1927-4-12 7159 Riverside Painted Canyon Comment
  UC908024  Gilia ochroleuca subsp. exilis Frank W. Peirson 1928-3-24 7725 Riverside near Auto Camp (Temescal Canyon); Temescal Canyon 304 Comment
  UC908061  Gilia latifolia Frank W. Peirson 1926-1-31 6498 Riverside Dos Palmas Comment
  UC908107  Saltugilia australis Frank W. Peirson 1921-3-22 4136 Riverside Murray Canyon Colorado Desert, Murray Canyon Comment
  UC908751  Saltugilia australis Frank W. Peirson 1928-4-19 7848 Riverside hills n Elsinore; hills n of Elsinore 457 Comment
  UC909104  Loeseliastrum schottii Frank W. Peirson 1926-2-22 6506 Riverside n. of grove palms 1000-Palm Canyon 152 Comment
  UC909116  Langloisia setosissima subsp. setosissima Frank W. Peirson 1927-4-12 7177 Riverside at camp near forks Painted Canyon; Colorado Desert, Painted Canyon Comment
  UC909126  Linanthus dianthiflorus Frank W. Peirson 1922-4-30 2930 Riverside road from Temecula River to Hemet Comment
Read comments
Mar 24 2011
  UC912512  Viguiera parishii Frank W. Peirson 1921-3-20 Riverside Murray Canyon Region Colorado Desert, Murray Canyon Region Comment
  UCD50378  Achnatherum hymenoides F. W. Peirson 1921-3-24 4322 Riverside White Water, Colorado Desert Comment
  UCD65761  Dasyochloa pulchella F. W. Peirson 1920-2-16 1546 Riverside arm of Colorado Desert south of Palm Springs, Garden of Eden. Comment
  UCD91779  Poa secunda subsp. secunda F. W. Peirson 1919-4-12 1551 Riverside Tahquitz Camp, Palm Springs, Colorado Desert. Comment
  UCD91780  Poa secunda subsp. secunda F. W. Peirson 1921-3-22 5368 Riverside Murray Canyon, Colorado Desert. 396 Comment
  UCD91782  Poa secunda subsp. secunda F. W. Peirson 1933-4-15 10655 Riverside Whitewater River, 4.5 miles above bridge. 701 Comment
  UCR136623  Myosurus minimus subsp. apus F. W. Peirson 1922-4-29 2945 Riverside Elsinore Trough, Lake Elsinore, about mudflat south of lake 375 Comment
  UCR139384  Lycium andersonii F. W. Peirson 1922-4-29 1084 Riverside Perris-Aguanga Region, Aguanga 610 Comment
  UCR142549  Parietaria hespera var. hespera F. W. Peirson 1920-2-15 1714 Riverside San Jacinto Mtns./Sonoran (Colorado) Desert, Tahquitz Canyon, near Palm Springs 427 Comment
  UCR142729  Hornungia procumbens F. W. Peirson 1922-4-30 1896 Riverside Peninsular Range, Lancaster Valley, road from Hemet to Temecula 518 Comment
  UCR142735  Encelia farinosa F. W. Peirson 1922-4-9 1331 Riverside San Jacinto Mountains/ Sonoran (Colorado) Desert, Murray Canyon, Palm Springs region, c. 0.5 mi. above mouth 305 Comment
  UCR208133  Cryptantha racemosa F. W. Peirson 1921-3-23 2377 Riverside Sonoran (Colorado) Desert, Deep Canyon 335 Comment
  UCR208174  Muilla maritima F. W. Peirson 1922-4-29 2942 Riverside Perris-Aguanga Region, 2 miles south of Lake Elsinore along boulevard 366 Comment
  UCR208881  Astragalus didymocarpus var. dispermus F. W. Peirson 1922-4-29 2939 Riverside Peninsular Range, Dripping Spring, near Temecula River 457 Comment
  UCR70880  Juncus sphaerocarpus F. W. Peirson 1922-5-19 3019 Riverside Menifee Valley 457 Comment
  UCR80284  Alopecurus saccatus F. W. Peirson, P. A. Munz 1922-5-19 s.n. Riverside Menifee Valley 457 Comment
  CAS-BOT-BC407620  Gilia ochroleuca subsp. exilis Frank W. Peirson 1919-4-15 921 Riverside Whitewater Grade above Cabazon Comment
  POM93893  Encelia farinosa var. farinosa F. W. Peirson 1922-4-9 1331 Riverside Palm Canyon Region, near Palm Springs. Comment
  POM9932  Cheilanthes viscida F. W. Peirson 1921-3-22 2371 Riverside Murray Canyon, south side in canyon 457 Comment
  POM9934  Notholaena californica subsp. californica F. W. Peirson 1920-2-15 s.n. Riverside Palm Springs, Tahquitz Camp. Comment
  RSA0004824  Epilobium glaberrimum subsp. glaberrimum F. W. Peirson 1924-7-28 5013 Riverside Pine Flats Camp 1799 Comment
  RSA0007778  Allium haematochiton F. W. Peirson 2394 Riverside 4 mi. W of Beaumont. Comment
  RSA0010921  Castilleja densiflora subsp. gracilis F. W. Peirson 1930-5-10 8776 Riverside Summit St John's Grade. 762 Comment
  RSA0011741  Asplenium vespertinum F. W. Peirson 1922-4-28 2919 Riverside Leach Canyon, near Elsinore. 609 Comment
  RSA0015892  Erythranthe moschata F. W. Peirson 1924-7-28 5007 Riverside Pine Flats Camp 1799 Comment
  RSA0016055  Diplacus bigelovii var. bigelovii F. W. Peirson 1920-2-16 1121 Riverside Palm Canyon stream below the canyon, Palm Springs. region Comment
  RSA0016300  Gilia ochroleuca subsp. exilis F. W. Peirson 1928-3-24 7725 Riverside Temescal Canyon. 305 Comment
  RSA0017275  Gilia ochroleuca subsp. exilis F. W. Peirson 1938-5-30 12413 Riverside Thomas Mountain, Hemet Valley. 1402 Comment
  RSA0018447  Fragaria vesca F. W. Peirson 1922-5-19 3038 Riverside San Jacinto River. 1143 Comment
  RSA0018750  Nicotiana obtusifolia F. W. Peirson 1920-2-15 s.n. Riverside Murray Canyon near Palm Springs Comment
  RSA0018759  Nicotiana obtusifolia F. W. Peirson 1917-4-1 1089 Riverside Andreas Canyon near Palm Springs. Comment
  RSA0018791  Erythranthe guttata F. W. Peirson 1922-4-8 4720 Riverside Murray Canyon near Palm Springs. Comment
  RSA0018792  Erythranthe guttata F. W. Peirson 1917-4-1 1125 Riverside Andreas Canyon near Palm Springs. Comment
  RSA0018963  Thalictrum fendleri var. fendleri F. W. Peirson 1924-7-27 4995 Riverside Deer Springs, San Jacinto Mtns. 2668 Comment
  RSA0020492  Delphinium parishii subsp. parishii F. W. Peirson 1902-4-9 2902 Riverside Murray Canyon, Palm Springs Region Comment
  RSA0022087  Ribes montigenum F. W. Peirson 685 Riverside Summit of Mt. San Jacinto. 3262 Comment
  RSA0022920  Eschscholzia parishii F. W. Peirson 1921-4-13 5324 Riverside Foot of Deep Canyon, Coachella Valley 274 Comment
  RSA0022930  Eschscholzia androuxii F. W. Peirson 1928-4-23 7888 Riverside 2.5 miles below cottonwood Springs. Comment
  RSA0022931  Eschscholzia androuxii F. W. Peirson 1926-2-22 s.n. Riverside Thousand Palm canyon, near Indio. Comment
  RSA0022975  Eschscholzia androuxii F. W. Peirson 1927-4-11 7153 Riverside 0.5 mile below Whitewater Bridge, head of Coachella Valley. Comment
  RSA0023471  Tropidocarpum gracile F. W. Peirson 1918-1 1901 Riverside Whitewater, head of Coachella Valley. Comment
  RSA0050341  Ceanothus tomentosus F. W. Peirson 1921-3-19 2364 Riverside 4 miles west of Beaumont on the Redlands Road. 762 Comment
  RSA0066506  Orobanche californica subsp. feudgei Frank W. Peirson 1938-5-30 s.n. Riverside Thomas Mountain, Hemet Valley. Slopes south of the Shell Gas station. 1402 Comment
  RSA0066528  Orobanche cooperi subsp. cooperi Frank W. Peirson 1924-12-30 5422 Riverside Thousand-Palms Canyon, Coachella Valley. 121 Comment
  RSA0066539  Orobanche cooperi subsp. cooperi Frank W. Peirson 1917-4-1 1176 Riverside Near Palm Springs, Coachella Valley. Comment
  RSA0066613  Harpagonella palmeri F. W. Peirson 1922-5-19 3029 Riverside 2.5 miles NE of Murrieta on the road to Perris. Comment
  RSA0075624  Cryptantha intermedia var. johnstonii F. W. Peirson 1918-03 1020 Riverside Field near Indio. Comment
  RSA0081611  Pyrola aphylla F. W. Peirson 1924-7-27 4988 Riverside Dark Canyon, San Jacinto Mts. 1905 Comment
  RSA0087147  Centromadia pungens subsp. laevis F. W. Peirson 1924-6-21 4762 Riverside Near Temecula. 335 Comment
  RSA0091445  Amsinckia tessellata F. W. Peirson 1919-4-13 995 Riverside Alkali Canyon, first canyon east of Palm Canyon near Palm Springs. 381 Comment
  RSA0094962  Saltugilia australis F. W. Peirson 1921-3-22 4136 Riverside Murray Canyon, Colo. Desert. 396 Comment
  RSA0094965  Saltugilia australis F. W. Peirson 1928-4-19 7841 Riverside Hills north of Elsinore. 457 Comment
  RSA0095109  Saltugilia australis F. W. Peirson 1919-4-13 926 Riverside Tahquitz Camp, Palm Springs. Comment
  RSA0097301  Spergularia atrosperma F. W. Peirson 1922-4-29 2953 Riverside South of Lake Elsinore. 381 Comment
  RSA0098430  Spergularia macrotheca var. leucantha F. W. Peirson 1922-4-30 2958 Riverside 1 mile west of Lakeview, San Jacinto Valley. 427 Comment
  RSA0098505  Spergularia marina F. W. Peirson 1922-5-21 3052 Riverside Foot of Jack Rabbit Grade, near Moreno. 427 Comment
  RSA0098506  Spergularia marina var. tenuis F. W. Peirson 1922-4-29 1867 Riverside South of Lake Elsinore. 374 Comment
  RSA0117462  Collinsia concolor F. W. Peirson 1921-5-19 3040 Riverside Rocky slope not far from floor of Hemet Valley. 1341 Comment
  RSA0121585  Eriastrum sapphirinum subsp. dasyanthum F. W. Peirson 1920-6-22 4474 Riverside Dripping Spring southeast of Temecula 457 Comment
  RSA0121592  Eriastrum sapphirinum subsp. dasyanthum F. W. Peirson 1920-6-22 4708 Riverside Temescal Canyon. 305 Comment
  RSA0126334  Arabis glaucovalvula F. W. Peirson 1941-4-9 s.n. Riverside At junction of Pinto Basin Rd and road to Cottonwood Spring. Comment
  RSA0126423  Nemacladus longiflorus var. longiflorus F. W. Peirson 1922-4-28 2920 Riverside Temescal Canyon. 335 Comment
  RSA0127363  Mentzelia longiloba var. longiloba F. W. Peirson 1932-3-22 9809 Riverside About 6 miles N of Blythe on Needles Road. 122 Comment
  RSA087025  Lupinus densiflorus var. lacteus F. W. Peirson 1914-04 705 Riverside Whitewater at head of Coachella Valley. Comment
  RSA087054  Lupinus microcarpus var. densiflorus F. W. Peirson 1929-5-4 8340 Riverside 2 miles north of Aguanga, South of Hemet. 549 Comment
  RSA65025  Silene multinervia F. W. Peirson 1925-5-20 6013 Riverside Burned area in chaparral, 1 mile northwest of Dripping Spring, W. Riverside Co. 457 Comment
  RSA65838  Sisymbrium altissimum F. W. Peirson 1922-4-22 5331 Riverside Field S of Lake Elsinore. Comment
  RSA69703  Mentzelia affinis F. W. Peirson 1928-3-11 7713 Riverside 8 miles SE of Palm Springs, Riverside County. Comment
  RSA87059  Hordeum murinum subsp. glaucum F. W. Peirson 1921-3-22 4337 Riverside Murray Canyon, near Palm Springs 396 Comment
  RSA90068  Lotus argophyllus var. argophyllus F. W. Peirson 1922-4-30 2933 Riverside Summit of St. John's Grade, south of Hemet Comment
  RSA90073  Lotus argophyllus var. argophyllus F. W. Peirson 1921-3-22 4092 Riverside Andreas Canyon, Palm Springs region Comment
  RSA90153  Astragalus didymocarpus var. dispermus F. W. Peirson 1922-4-29 2939 Riverside Dripping Spring, Temecula River, southwestern Riverside Co. 457 Comment
  RSA90156  Astragalus didymocarpus F. W. Peirson 1914-1 576 Riverside Whitewater, east of Cabezon Comment
  RSA90159  Astragalus didymocarpus var. dispermus F. W. Peirson 1918-03 579 Riverside Coachella Valley, field near Indio. Comment
  RSA90166  Astragalus lentiginosus var. borreganus F. W. Peirson 1924-12-29 5402 Riverside Near Garnet, northeast of Palm Springs Comment
  RSA90202  Alopecurus saccatus F. W. Peirson 1922-5-19 3021 Riverside 10 miles northeast of Murrieta. Comment
  RSA90215  Astragalus filipes F. W. Peirson 1922-5-20 3341 Riverside Hemet Valley, San Jacinto Mountains. 1371 Comment
  RSA90230  Astragalus douglasii var. parishii F. W. Peirson 1922-5-20 3342 Riverside Hemet Valley, San Jacinto Mountains. 1371 Comment
  RSA90289  Lathyrus vestitus subsp. alefeldii F. W. Peirson 1922-4-28 2946 Riverside Leach Canyon Near Lake Elsinore. 549 Comment
  RSA90292  Lotus grandiflorus F. W. Peirson 1924-7-27 4981 Riverside Dark Canyon, San Jacinto Mountains 1707 Comment
  RSA90301  Lotus hamatus F. W. Peirson 1919-4-12 714 Riverside Along the Tahquitz Creek stream near Palm Springs Comment
  RSA90307  Lotus rigidus F. W. Peirson 1921-3-23 4084 Riverside Deep Canyon, north base of Santa Rosa Mts. 335 Comment
  RSA90309  Lotus salsuginosus var. brevivexillus F. W. Peirson 1922-4-9 2873 Riverside In canyon eastward from lower part of Palm Canyon. Comment
  RSA90331  Lotus argophyllus subsp. decorus F. W. Peirson 1921-3-19 2367 Riverside Whitewater Point, head of Coachella Valley Comment
  RSA90339  Lotus wrangelianus F. W. Peirson 1922-4-29 4081 Riverside Dripping Spring, Temecula River, southwestern Riverside Co. 457 Comment
  RSA90345  Lotus wrangelianus F. W. Peirson 1930-5-10 8770 Riverside Roadside, on Hemet Plateau near March Field, between Riverside and Perris. 457 Comment
  RSA90355  Lotus nevadensis var. nevadensis F. W. Peirson 1924-7-27 4989 Riverside San Jacinto Mountains: Dark Canyon. 2226 Comment
  RSA90380  Lotus salsuginosus var. brevivexillus F. W. Peirson 1927-4-12 7155 Riverside Painted canyon, near Mecca. Comment
  RSA90388  Lotus strigosus var. tomentellus F. W. Peirson 1921-4-13 4085 Riverside Deep Canyon, about 12 miles southeast of Palm Springs. 274 Comment
  RSA90395  Lotus salsuginosus var. brevivexillus F. W. Peirson 1935-4-17 s.n. Riverside 30 miles north of Blythe. Comment
  RSA90412  Lotus oblongifolius F. W. Peirson 1924-7-28 5018 Riverside Pine Flats Camp 1799 Comment
  RSA90426  Lotus salsuginosus var. salsuginosus F. W. Peirson 1928-3-10 7705 Riverside Hidden Spring, northern Colorado Desert. Comment
  RSA90445  Glycyrrhiza lepidota F. W. Peirson 1920-6-22 588 Riverside Santa Ana River. 152 Comment
  RSA90638  Astragalus palmeri F. W. Peirson 1921-3-23 4752 Riverside Deep Canyon, SE of Palm Springs. 335 Comment
  RSA90640  Astragalus palmeri F. W. Peirson 1921-3-21 4751 Riverside Gordon Trail, E slope of San Jacinto Mts. 1220 Comment
  RSA90691  Gutierrezia sarothrae F. W. Peirson 1920-6-22 5297 Riverside Temescal Canyon 335 Comment
  RSA90692  Gutierrezia sarothrae F. W. Peirson 1922-12-26 1217 Riverside Box Springs Grade near Riverside. Comment
  RSA90703  Astragalus nuttallianus var. cedrosensis F. W. Peirson 1922-4-9 584 Riverside Murray Canyon, near Palm Springs Comment
  RSA90738  Astragalus douglasii var. parishii F. W. Peirson 1922-4-29 2955 Riverside In the wash along Temecula River, Aguanga, Riverside. 579 Comment
  RSA90739  Astragalus pomonensis F. W. Peirson 1920-6-22 7696 Riverside Dripping Springs, Temecula River 457 Comment
  RSA90742  Astragalus pomonensis F. W. Peirson 1922-4-29 2957 Riverside Roadside W of Lake Elsinore. 381 Comment
  RSA90749  Astragalus pachypus var. jaegeri F. W. Peirson 1922-4-29 2950 Riverside 1 mile or more south of Dripping Springs, Temecula River 518 Comment
  RSA90750  Astragalus pachypus var. jaegeri F. W. Peirson 1920-6-23 2205 Riverside Aguanga 609 Comment
  RSA90892  Carex sartwelliana F. W. Peirson 1924-7-28 5015 Riverside Pine Flats Camp 1799 Comment
  RSA90953  Erigeron divergens F. W. Peirson 1921-3-22 2365 Riverside Andreas Canyon, Palm Springs region Comment
  RSA91031  Calochortus weedii var. weedii Frank W. Peirson 1920-6-22 2171 Riverside Dripping Springs, Temecula River 457 Comment
  RSA91079  Trifolium depauperatum var. truncatum F. W. Peirson 1922-4-29 2938 Riverside Mud flat south of Elsinore Comment
  RSA91118  Trifolium monanthum subsp. grantianum F. W. Peirson 1924-7-28 5016 Riverside Pine flats Camp, San Jacinto Mts. 1799 Comment
  RSA91131  Trifolium microcephalum F. W. Peirson 1930-5-10 8774 Riverside Summit of St. Johns Grade south of Hemet. 762 Comment
  RSA91176  Isocoma acradenia var. eremophila F. W. Peirson 1922-12-28 4740 Riverside Andreas Canyon, east base of San Jacinto Mts. 244 Comment
  RSA91190  Lupinus hyacinthinus F. W. Peirson 1938-5-30 12412 Riverside Thomas Mountain, Hemet Valley. 1402 Comment
  RSA91199  Lupinus excubitus var. hallii F. W. Peirson 1922-5-18 3063 Riverside Temescal Canyon, western Riverside County 274 Comment
  RSA91205  Lupinus excubitus var. hallii F. W. Peirson 1929-5-4 8339 Riverside 2 miles north of Aguanga, South of Hemet. 549 Comment
  RSA91207  Lupinus excubitus var. hallii F. W. Peirson 1922-4-28 2947 Riverside Leach Canyon Near Lake Elsinore. 549 Comment
  RSA91216  Krameria grayi F. W. Peirson 1934-04 2034 Riverside Whitewater at head of Coachella Valley. Comment
  RSA91231  Alnus rhombifolia F. W. Peirson 1928-3-10 7698 Riverside along irrigation ditch, Snow Creek Auto Camp at Whitewater, head of Coachella Valley. Comment
  RSA91359  Amorpha fruticosa F. W. Peirson 1919-4-12 702 Riverside Palm Canyon, near Palm springs. Comment
  RSA91372  Psorothamnus emoryi F. W. Peirson 1924-12-30 5417 Riverside Thousand-Palms Canyon, Colorado Desert 122 Comment
  RSA91374  Psorothamnus emoryi F. W. Peirson 1921-4-12 571 Riverside Near Indian Wells. Comment
  RSA91375  Psorothamnus emoryi F. W. Peirson 1939-11-25 s.n. Riverside Foot of mountain near Painted Canyon. Comment
  RSA91380  Linum lewisii F. W. Peirson 1922-5-20 3036 Riverside North side of Hemet Valley, San Jacinto Mts. 1372 Comment
  RSA91385  Hesperolinon micranthum F. W. Peirson 1922-5-19 3023 Riverside 2.5 miles NE of Murrieta 381 Comment
  RSA91406  Trifolium albopurpureum F. W. Peirson 1922-4-29 4069 Riverside South of Temecula on Temecula River, Riverside Co., California 427 Comment
  RSA91415  Trifolium albopurpureum F. W. Peirson 1914-04 549 Riverside Beaumont, San Gorgonio Pass. Comment
  RSA91429  Marina parryi F. W. Peirson 1921-3-23 2383 Riverside Deep Canyon Wash, 12 miles southeast of Palm Spring 229 Comment
  RSA91430  Dalea mollis F. W. Peirson 1932-3-22 9811 Riverside 20 miles North of Blythe on the road to Needles, Eastern Riverside. 152 Comment
  RSA91431  Dalea mollissima F. W. Peirson 1916-04 570 Riverside Region of Palm Springs. Comment
  RSA91432  Dalea mollissima F. W. Peirson 1922-4-11 4428 Riverside Deep Canyon Wash, about 12 miles SE of Palm Springs 244 Comment
  RSA91438  Psorothamnus schottii F. W. Peirson 1921-4-13 566 Riverside Deep Canyon Wash, about 12 miles SE of Palm Springs. 152 Comment
  RSA91439  Psorothamnus spinosus F. W. Peirson 1921-4-13 568 Riverside Deep Canyon Wash, about 12 miles SE of Palm Springs. 152 Comment
  RSA91514  Poa secunda F. W. Peirson 1921-3-22 5368 Riverside Murray Canyon, near Palm Springs 396 Comment
  RSA91516  Poa secunda F. W. Peirson 1933-4-15 1055 Riverside Whitewater Canyon, 4 miles above bridge of Hwy from Banning to Indio, 701 Comment
  RSA91517  Poa secunda F. W. Peirson 1919-4-12 1551 Riverside Tahquitz canyon near Palm Springs. Comment
  RSA91537  Trifolium willdenovii F. W. Peirson 1919-4-14 559 Riverside Murray Canyon, Palm Springs Region. Comment
  RSA91542  Dasyochloa pulchella F. W. Peirson 1928-3-10 7711 Riverside Small side canyon in which Hidden Spring is located, northeast of Mecca Comment
  RSA91543  Dasyochloa pulchella F. W. Peirson 1920-2-16 1546 Riverside South of Palm Springs, arm of Colorado Desert Comment
  RSA91579  Schoenoplectus maritimus F. W. Peirson 1922-4-29 5376 Riverside Roadside ditch, Temecula, Riverside Co., California. Comment
  RSA91580  Schoenoplectus maritimus F. W. Peirson 1918-03 1618 Riverside Mecca. Comment
  RSA91692  Bromus rubens F. W. Peirson 1918-03 1557 Riverside Palm Springs Comment
  RSA91697  Gnaphalium palustre F. W. Peirson 1930-5-10 8769 Riverside Roadside, on Hemet Plateau near March Field, between Riverside and Perris. 457 Comment
  RSA91699  Gnaphalium palustre F. W. Peirson 1924-7-29 5030 Riverside Banning to Idyllwild road, San Jacinto Mountains. 1570 Comment
  RSA91746  Muhlenbergia rigens F. W. Peirson 1921-3-23 2373 Riverside Deep Canyon south of Coachella Valley 335 Comment
  RSA91784  Ericameria linearifolia F. W. Peirson 1921-3-21 2380 Riverside Gordon trail from Andreas Canyon to San Jacinto Peak. 915 Comment
  RSA91826  Cenchrus echinatus F. W. Peirson 1937-11-27 12246 Riverside La Quinta, Coachella Valley. 0 Comment
  RSA91911  Phleum alpinum F. W. Peirson 1924-7-27 4996 Riverside Deer Springs, San Jacinto Mountains 2668 Comment
  RSA91917  Phragmites australis F. W. Peirson 1924-12-30 5407 Riverside Thousand Palms Canyon, Coachella Valley. 122 Comment
  RSA91958  Glyceria striata F. W. Peirson 1924-7-27 4985 Riverside Along creek in Dark Canyon, 1829 Comment
  RSA91979  Pleuraphis rigida F. W. Peirson 1921-3-22 2369 Riverside Murray Canyon, near Palm Springs 396 Comment
  RSA91986  Achnatherum hymenoides F. W. Peirson 1921-3-24 4322 Riverside Whitewater at head of Coachella Valley Comment
  RSA92084  Eleocharis bella F. W. Peirson 1921-5-20 3028 Riverside About 1 mile below Kenworthy, Hemet Valley 1387 Comment
  RSA92089  Eleocharis geniculata F. W. Peirson 1924-12-30 5408 Riverside Thousand-Palms Canyon, Colorado Desert 122 Comment
  RSA92090  Eleocharis geniculata F. W. Peirson 1921-3-20 2923 Riverside Palm Canyon, east base of San Jacinto Mountains 305 Comment
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Oct 1 2011
  RSA92101  Cyperus laevigatus F. W. Peirson 1924-12-30 5405 Riverside Thousand-Palms Canyon, Colorado Desert 122 Comment
  RSA92107  Cyperus squarrosus F. W. Peirson 1924-7-29 5031 Riverside Banning to Idyllwild road, San Jacinto Mountains. 1570 Comment
  RSA92130  Eleocharis palustris F. W. Peirson 1922-4-29 1619 Riverside Temecula River, southwestern Riverside County 427 Comment
  RSA92140  Schoenoplectus americanus F. W. Peirson 1921-3-20 2848 Riverside Palm Canyon, Colorado Desert. 305 Comment
  RSA92142  Schoenoplectus americanus F. W. Peirson 1924-12-30 5406 Riverside Thousand-Palms Canyon, north side of Coachella Valley. 122 Comment
  RSA92197  Hymenoxys odorata F. W. Peirson 1935-4-17 11468 Riverside Abundant on roadsides for several miles, river bottom lands, 20-22 miles S of Blythe. Comment
  RSA92212  Palafoxia arida var. arida F. W. Peirson 1914-04 1381 Riverside Whitewater at head of Coachella Valley. Comment
  RSA92213  Palafoxia arida var. arida F. W. Peirson 1918-03 4310 Riverside Field near Indio. Comment
  RSA92216  Palafoxia arida var. arida F. W. Peirson 1924-12-30 5426 Riverside Thousand Palms Canyon, Coachella Valley. 122 Comment
  RSA92219  Pectis papposa F. W. Peirson 1937-11-27 12245 Riverside La Quinta, Coachella Valley. 0 Comment
  RSA92220  Perityle emoryi F. W. Peirson 1369 Riverside Andreas Canyon near Palm Springs. 274 Comment
  RSA92256  Layia platyglossa subsp. campestris F. W. Peirson 1918-03 1362 Riverside Cabaon, Whitewater, grade, E of Banning. 549 Comment
  RSA92370  Orcuttia californica F. W. Peirson 1922-5-19 3020 Riverside In Menifee Valley, 10 miles northeast of Murrieta 427 Comment
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Apr 3 2011
  RSA92380  Psilocarphus brevissimus F. W. Peirson 1922-4-29 2949 Riverside South of Lake Elsinore. 381 Comment
  RSA92387  Eriophyllum multicaule F. W. Peirson 1922-4-29 2927 Riverside Road to Leach Canyon 1 mile N of Lake Elsinore. Comment
  RSA92388  Eriophyllum multicaule F. W. Peirson 1914-04 1384 Riverside Whitewater at head of Coachella Valley. Comment
  RSA92402  Bebbia juncea F. W. Peirson 1924-6-21 4756 Riverside Temescal Canyon, near Elsinore 305 Comment
  RSA92403  Bebbia juncea F. W. Peirson 1917-4-1 1323 Riverside Palm Springs Comment
  RSA92436  Poa bigelovii F. W. Peirson 1921-3-22 2392 Riverside Murray Canyon near Palm Springs. 457 Comment
  RSA92446  Panicum urvilleanum F. W. Peirson 1928-3-10 7703 Riverside Just east of Whitewater Bridge, near Whitewater, at head of Coachella Valley. Comment
  RSA92505  Stylocline gnaphaloides F. W. Peirson 1930-5-10 8775 Riverside Summit of St. Johns Grade, south of Hemet. 762 Comment
  RSA92511  Eriophyllum multicaule F. W. Peirson 1928-4-19 7842 Riverside Hills N of Elsinore 457 Comment
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Oct 23 2011
  RSA92525  Bahiopsis parishii F. W. Peirson 1922-4-9 4148 Riverside Murray Canyon, near Palm Springs Comment
  RSA92609  Salix exigua F. W. Peirson 1920-6-22 4282 Riverside Santa Ana River. 152 Comment
  RSA92622  Salix lasiolepis F. W. Peirson 1922-6-29 5437 Riverside Tahquitz Valley. 2134 Comment
  RSA92625  Eriophyllum confertiflorum F. W. Peirson 1924-7-29 5023 Riverside Road between Banning and Idyllwild. 1767 Comment
  RSA92653  Salix exigua F. W. Peirson 1933-4-15 10650 Riverside Whitewater River, 4.5 miles above highway from Banning to Indio. 701 Comment
  RSA92654  Salix lasiolepis F. W. Peirson 1933-4-14 10648 Riverside Road between Banning and Idyllwild. 1524 Comment
  RSA92695  Salix exigua F. W. Peirson 1924-12-30 5410 Riverside Thousand-Palms Canyon, Colorado Desert 122 Comment
  RSA92696  Salix gooddingii F. W. Peirson 1918-03 719 Riverside Near Mecca and the Salton Sea. Comment
  RSA92703  Salix laevigata F. W. Peirson 1928-3-10 7700 Riverside along irrigation ditch, Snow Creek Auto Camp at Whitewater, head of Coachella Valley. Comment
  RSA92873  Baileya pauciradiata F. W. Peirson 1921-4-12 2775 Riverside Near Indian Wells. Comment
  RSA92874  Baileya pauciradiata F. W. Peirson 1926-2-22 6503 Riverside Thousand Palm Canyon, Coachella Valley 122 Comment
  RSA92883  Populus fremontii F. W. Peirson 1928-3-10 7699 Riverside along irrigation ditch, Snow Creek Auto Camp at Whitewater, head of Coachella Valley. Comment
  RSA92894  Lasthenia gracilis F. W. Peirson 1922-4-29 4520 Riverside Field S of Lake Elsinore 375 Comment
  RSA92915  Lasthenia gracilis F. W. Peirson 1918-03 1374 Riverside Whitewater Grade, nw. corner of Colorado Desert. Comment
  RSA92991  Lasthenia coronaria F. W. Peirson 1922-5-19 4519 Riverside 5 miles NE of Murrieta 457 Comment
  RSA92992  Lasthenia coronaria F. W. Peirson 1919-4-15 1373 Riverside Whitewater Grade east of Banning 610 Comment
  RSA93014  Lasthenia microglossa F. W. Peirson 1919-4-14 1376 Riverside Shelter of high wall of rock, Murray Canyon near Palm Springs. 488 Comment
  RSA93084  Pluchea sericea F. W. Peirson 1918-03 1298 Riverside Palm Springs. Comment
  RSA93161  Baccharis sergiloides F. W. Peirson 1928-9-6 8205 Riverside Morongo Canyon, eastern end of San Bernardino Mts. Comment
  RSA93169  Baccharis salicifolia F. W. Peirson 1920-2-15 2316 Riverside Palm Springs, Tahquitz Camp. Comment
  RSA93170  Baccharis salicifolia F. W. Peirson 1933-4-15 10654 Riverside Whitewaer River, 4.5 miles above bridge of Indio Hwy 701 Comment
  RSA93199  Baccharis salicifolia F. W. Peirson 1918-03 2231 Riverside Whitewater at head of Coachella Valley. Comment
  RSA93201  Baccharis salicifolia F. W. Peirson 1924-12-30 5424 Riverside Thousand-Palms Canyon, Colorado Desert 122 Comment
  RSA93205  Baccharis salicifolia F. W. Peirson 1920-6-23 8663 Riverside Temecula River. 854 Comment
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Mar 15 2017
  RSA93215  Pentachaeta aurea F. W. Peirson 1938-5-30 s.n. Riverside Thomas Mountain, Hemet Valley. 1402 Comment
  RSA93216  Corethrogyne filaginifolia F. W. Peirson 1924-7-28 5017 Riverside Pine Flats Camp 1799 Comment
  RSA93230  Chrysothamnus paniculatus F. W. Peirson 1939-11-26 12901 Riverside 29 Palms about 7 miles from Blvd Comment
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Apr 24 2013
  RSA93245  Chrysothamnus paniculatus F. W. Peirson 1920-12-29 2334 Riverside 1.5 miles E of Whitewater Station near Point of Rocks 305 Comment
  RSA93246  Chrysothamnus teretifolius F. W. Peirson 1937-10-20 12363 Riverside Santa Rosa Mts 1829 Comment
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Dec 17 2011
  RSA93251  Ericameria cuneata var. spathulata F. W. Peirson 1928-11-30 8214 Riverside about 1 mile north of Cottonwood Spring, northeast of Mecca. Comment
  RSA93281  Pentachaeta aurea F. W. Peirson 1922-5-19 3037 Riverside San Jacinto River 1143 Comment
  RSA93325  Xylorhiza cognata F. W. Peirson 1927-4-13 7258 Riverside Painted Canyon, near Mecca Comment
  RSA93327  Xylorhiza cognata F. W. Peirson 1927-4-12 7159 Riverside Painted Canyon, near Mecca Comment
  RSA93330  Downingia cuspidata F. W. Peirson 1922-4-29 2925 Riverside South of Lake Elsinore. 381 Comment
  RSA93354  Machaeranthera asteroides F. W. Peirson 1935-4-17 11471 Riverside Eastern part of Blythe, colorado Desert, Comment
  RSA93680  Filago californica F. W. Peirson 1921-3-22 5277 Riverside Murray Canyon, south side in canyon 457 Comment
  RSA93686  Ambrosia psilostachya F. W. Peirson 1920-12-29 5276 Riverside Murray Canyon near Palm Springs. Comment
  RSA93715  Brickellia arguta F. W. Peirson 1919-4-13 1214 Riverside Along the Tahquitz creek, East of Palm Springs, Riverside. Comment
  RSA93718  Brickellia arguta F. W. Peirson 1928-4-24 7900 Riverside Below Cottonwood Spring, northern edge of Colorado Desert. Comment
  RSA93727  Pleurocoronis pluriseta F. W. Peirson 1927-4-12 7173 Riverside Painted Canyon, near Mecca Comment
  RSA93730  Acamptopappus sphaerocephalus var. sphaerocephalus F. W. Peirson 1927-4-11 7154 Riverside 0.5 mile below Whitewater Bridge, head of Coachella Valley. Comment
  RSA93765  Geraea canescens F. W. Peirson 1918-03 1333 Riverside Irrigated field near Indio. Comment
  RSA93767  Geraea canescens F. W. Peirson 1921-3-23 2782 Riverside 10 miles SE of Palm Spring Comment
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Apr 21 2011
  RSA93769  Helianthus niveus subsp. canescens F. W. Peirson 1918-03 1329 Riverside Irrigated field near Indio. Comment
  RSA93778  Lobelia cardinalis subsp. graminea F. W. Peirson 1922-12-27 8649 Riverside About 1 miles up in Andreas Canyon, Palm Springs region. Comment
  RSA93812  Chaenactis fremontii F. W. Peirson 1926-2-22 6501 Riverside On talus slope east of bridge over Whitewater River, head of Coachella Valley Comment
  RSA93827  Chaenactis carphoclinia var. carphoclinia F. W. Peirson 1926-2-22 6504 Riverside Thousand-Palms Canyon. 152 Comment
  RSA93829  Chaenactis carphoclinia var. carphoclinia F. W. Peirson 1922-4-11 2858 Riverside Deep Canyon Wash, Coachella Valley 244 Comment
  RSA93897  Rhus trilobata var. pilosissima F. W. Peirson 1928-3-24 7726 Riverside 1-2 miles north of Dripping Springs, grade on Temecula River, sw. Riverside County. 426 Comment
  RSA93922  Dicoria canescens F. W. Peirson 1924-12-30 5425 Riverside Thousand-Palms Canyon, edge of Coachella Valley. 122 Comment
  RSA93923  Dicoria canescens F. W. Peirson 1920-12-29 2333 Riverside 1.5 miles east of Whitewater Station, head of Coachella Valley. Comment
  RSA93928  Ambrosia dumosa F. W. Peirson 1920-2-16 1319 Riverside Colorado Desert. Garden of Eden east of Palm Springs. Comment
  RSA93954  Hymenoclea monogyra F. W. Peirson 1919-4-12 1317 Riverside Tahquitz canyon near Palm Springs. Comment
  RSA93957  Hymenoclea salsola F. W. Peirson 1914-04 2494 Riverside Whitewater at head of Coachella Valley. Comment
  RSA94066  Hemizonia kelloggii F. W. Peirson 1924-6-21 4757 Riverside Temescal Canyon. 290 Comment
  RSA94085  Psathyrotes ramosissima F. W. Peirson 1927-4-12 7165 Riverside Forks of Painted Canyon, near Mecca Comment
  RSA94086  Psathyrotes ramosissima F. W. Peirson 1918-03 1426 Riverside Between Palm Springs and Indio. Comment
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Feb 22 2009
  RSA94099  Hemizonia kelloggii F. W. Peirson 1925-5-20 6011 Riverside Aguanga. 610 Comment
  RSA94106  Peucephyllum schottii F. W. Peirson 1919-4-13 4737 Riverside First canyon S of Palm Canyon near Palm Springs. Comment
  RSA94107  Peucephyllum schottii F. W. Peirson 1924-12-30 5423 Riverside Thousand Palms Canyon, Coachella Valley. 122 Comment
  RSA94108  Peucephyllum schottii F. W. Peirson 1921-3-23 2753 Riverside Deep Canyon, north base of Santa Rosa Mts. 335 Comment
  RSA94110  Peucephyllum schottii F. W. Peirson 1930-3-29 8690 Riverside Colorado Desert. Painted Canyon, near Mecca. Comment
  RSA94111  Peucephyllum schottii F. W. Peirson 1918-03 1244 Riverside SE side of desert embankment at Palm Springs and almost opposite Andreas Canyon. Comment
  RSA94115  Brickellia incana F. W. Peirson 1928-4-23 7889 Riverside 2.5 miles below cottonwood Springs, Riverside County Comment
  RSA94118  Brickellia desertorum F. W. Peirson 1920-12-29 2336 Riverside Andreas Canyon near Palm Springs 244 Comment
  RSA94162A  Monoptilon bellidiforme F. W. Peirson 1928-4-24 7899 Riverside Below Cottonwood Springs, Eagle Mountains. Northern Colorado Desert. Comment
  RSA94162B  Monoptilon bellioides F. W. Peirson 1928-4-24 7899 Riverside Below Cottonwood Springs, Eagle Mountains. Northern Colorado Desert. Comment
  RSA94164  Monoptilon bellioides F. W. Peirson 1920-2-15 1383 Riverside Neaar Palm Springs, Coachella Valley. Comment
  RSA94166  Monoptilon bellioides F. W. Peirson 1926-1-31 6491 Riverside Dos Palmas [Spring], Colorado Desert. Comment
  RSA94168  Monoptilon bellioides F. W. Peirson 1922-4-11 2868 Riverside Deep Canyon Wash, southwest of Indio 244 Comment
  RSA94416  Eriophyllum ambiguum var. paleaceum F. W. Peirson 1933-4-13 10638 Riverside Road from Deep Canyon to Idyllwild. 610 Comment
  RSA94418  Eriophyllum ambiguum var. paleaceum F. W. Peirson 1920-2-16 1387 Riverside Murray Canyon, Palm Springs region. 274 Comment
  RSA94533  Artemisia californica F. W. Peirson 1920-12-29 1456 Riverside 1.5 miles east of whitewater, head of Coachella Valley. 305 Comment
  RSA94534  Artemisia californica F. W. Peirson 1922-12-27 3338 Riverside Between the forks of Andreas Canyon, east base of Mt. San Jacinto. 610 Comment
  RSA94615  Trichoptilium incisum F. W. Peirson 1919-4-1 1408 Riverside Palm Springs. Comment
  RSA94628  Psilostrophe cooperi F. W. Peirson 1928-4-25 7916 Riverside On plateau west and northwest of Cottonwood Spring, northern Colorado Desert Comment
  RSA94639  Atrichoseris platyphylla F. W. Peirson 1927-4-12 7158 Riverside Painted Canyon, near Mecca Comment
  RSA94663  Senecio mohavensis F. W. Peirson 1928-3-10 7707 Riverside Along rock walls of canyon at Hidden Springs, northeast of Mecca. Comment
  RSA94664  Senecio mohavensis F. W. Peirson 1921-3-22 2378 Riverside Murray Canyon near Palm Springs. 457 Comment
  RSA94665  Senecio mohavensis F. W. Peirson 1927-4-12 7156 Riverside In Painted Canyon near Mecca. Comment
  RSA94668  Senecio douglasii var. monoensis F. W. Peirson 1928-4-23 7890 Riverside 2.5 miles below Cottonwood Spring, northern Colorado Desert Comment
  RSA94830  Trixis californica F. W. Peirson 1914-4-1 s.n. Riverside Whitewater at head of Coachella Valley Comment
  RSA94930  Tetradymia comosa F. W. Peirson 1920-6-22 1428 Riverside Temescal Canyon. 305 Comment
  RSA94960  Malacothrix stebbinsii F. W. Peirson 1921-3-22 2715 Riverside Murray Canyon, south side in canyon 457 Comment
  RSA94968  Malacothrix californica F. W. Peirson 1914-04 1478 Riverside Beaumont Comment
  RSA94984  Lepidospartum squamatum F. W. Peirson 1920-12-29 5267 Riverside 1.5 miles east of Whitewater Station, head of Coachella Valley. Comment
  RSA95026  Malacothrix coulteri F. W. Peirson 1922-4-29 2959 Riverside Roadside 2 miles south of Elsinore Comment
  RSA95060  Rafinesquia neomexicana F. W. Peirson 1914-04 1476 Riverside Whitewater at head of Coachella Valley. Comment
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Apr 30 2011
  RSA95061  Rafinesquia neomexicana F. W. Peirson 1920-2-16 2762 Riverside Garden of Eden at Palm Springs Comment
  RSA95082  Microseris lindleyi F. W. Peirson 1921-3-22 2381 Riverside Murray Canyon, south side in canyon 457 Comment
  RSA95084  Microseris douglasii subsp. douglasii F. W. Peirson 1922-4-30 2952 Riverside Plains one mile west of Lakeview, San Jacinto Valley 427 Comment
  RSA95111  Agoseris heterophylla var. heterophylla F. W. Peirson 1922-5-20 3045 Riverside Hemet Valley, San Jacinto Mountains. 1371 Comment
  RSA95184  Atrichoseris platyphylla F. W. Peirson 1926-1-31 6482 Riverside Dos Palmas Spring, NE of Mecca Comment
  RSA95238  Microseris heterocarpa F. W. Peirson 1922-4-29 2951 Riverside South of Lake Elsinore. 381 Comment
  RSA95242  Camissonia boothii subsp. condensata F. W. Peirson 1925-12-30 5429 Riverside Colorado Desert. Thousand Palms Canyon. Comment
  RSA95299  Hibiscus denudatus F. W. Peirson 1922-4-9 2900 Riverside Palm Canyon Region, near Palm Springs. Comment
  RSA95301  Sphaeralcea ambigua subsp. rosacea F. W. Peirson 1921-3-22 9599 Riverside Murray Canyon, Near Palm Springs. 366 Comment
  RSA95302  Sphaeralcea ambigua subsp. rosacea F. W. Peirson 1921-3-20 s.n. Riverside Palm Canyon near Palm Springs Comment
  RSA95320  Sphaeralcea ambigua subsp. ambigua F. W. Peirson 1917-4-1 2065 Riverside Andreas Canyon near Palm Springs. Comment
  RSA95324  Malacothamnus densiflorus var. densiflorus F. W. Peirson 1926-5-2 6724 Riverside Grade north of Dripping Spring, Temecula River, southwestern Riverside Co. Comment
  RSA95353  Ceanothus oliganthus F. W. Peirson 1931-5-30 9380 Riverside Along Glen Ivy Trail to Santiago Peak, Santa Ana Mts. 762 Comment
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Oct 1 2011
  RSA95365  Sphaeralcea ambigua subsp. ambigua F. W. Peirson 1919-4-13 777 Riverside Murray Canyon, Palm Springs Region. 457 Comment
  RSA95371  Sphaeralcea ambigua subsp. ambigua F. W. Peirson 1922-4-11 4106 Riverside Deep Canyon Wash, southwest of Indio 244 Comment
  RSA95373  Sidalcea malviflora subsp. sparsifolia F. W. Peirson 1922-5-20 4309 Riverside Hemet Valley, San Jacinto Mountains. 1372 Comment
  RSA95377  Sidalcea malviflora subsp. sparsifolia F. W. Peirson 1914-04 2058 Riverside Beaumont, San Gorgonio Pass. Comment
  RSA97151  Lomatium dasycarpum subsp. dasycarpum F. W. Peirson 1922-5-19 4461 Riverside 3 miles northeast of Murrieta. Comment
  RSA97228  Garrya flavescens var. pallida F. W. Peirson 1921-3-21 4464 Riverside Gordon trail from Andreas Canyon, San Jacinto Mts. 1524 Comment
  RSA97291  Garrya flavescens var. pallida F. W. Peirson 1933-4-13 10644 Riverside 1-2 miles SE of Palm Creek crossing, on road from Deep Canyon to Idyllwild, Santa Rosa Mts. 1524 Comment
  RSA97358  Bowlesia incana F. W. Peirson 1922-4-30 2954 Riverside Lancaster Valley about 1.5 miles from the Temecula River on road to Hemet 518 Comment
  RSA97373  Sanicula tuberosa F. W. Peirson 1922-4-29 4053 Riverside Leach Canyon, near Lake Elsinore, Santa Ana Mts. 610 Comment
  RSA97396  Apiastrum angustifolium F. W. Peirson 1922-5-19 5430 Riverside 5 miles northeast of Murrieta. Comment
  RSA97436  Lomatium vaginatum F. W. Peirson 1922-4-29 2932 Riverside South of Lake Elsinore. 381 Comment
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Dec 8 2013
  RSA97437  Phoradendron californicum F. W. Peirson 1924-12-30 5411 Riverside Thousand-Palms Canyon, Colorado Desert 122 Comment
  RSA97448  Phoradendron pauciflorum F. W. Peirson 1924-7-27 4992 Riverside on Abies concolor; Dark Canyon. 2515 Comment
  RSA97450  Phoradendron villosum F. W. Peirson 1924-7-28 5009 Riverside Pine Flats Camp 1799 Comment
  SEINET10458956  Triodanis biflora Frank W. Peirson Peirson 6723 Riverside DRIPPING SPRING Comment
  SEINET10460870  Nemacladus sigmoideus Frank W. Peirson Peirson 7913 Riverside n Colorado Desert Comment
  SEINET10461130  Nemacladus rubescens Frank W. Peirson 1926-1-31 Peirson 6486 Riverside About 2 miles from above station on Mecca Road Comment



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