Fig. 1. Photograph of Palm Canyon, 16 November 2010
Flora of Palm, Andreas, Murray and Tahquitz Canyons below 3000 Feet Elevation, San Jacinto Mountains
Fig. 2. Photograph of Tahquitz Falls, 16 November 2010
Table of Contents
Fig. 3. Photograph of Tahquitz Falls, 6 April 2011
The Indian Canyons west of Palm Springs have always been a magnet for botanists, as well as tourists. Samuel Parish collected the first voucher in 1881, in Andreas Canyon, of a rare hybrid between Cheilanthes parryi and C. covillei, called C. X parishii in his honor. Since then, over 100 different botanists have collected a total of 1,156 vouchers from this area.
The main attraction of this area is that it is a desert area with water - lots of water. The steep eastern face of the San Jacinto Mountains, with a drop of over 10,500 feet in elevation in only 7.2 miles linear distance, from the 11,040 foot San Jacinto Peak to the 500 foot mouth of Tahquitz Canyon. There is essentially no place for this water to be used or absorbed by the plants or geology, and it all comes tumbling down to this area.
The resulting palm oases are a lure for desert denizens in the summer, offering shade as well as water. As can be seen from Fig. 1, Palm Canyon has a lot of palms.
But most interesting of all to botanists is that this is a fascinating transition between the vegetation of the coastal side of the mountains and the true desert to the east. It was almost mind-boggling to us to repeatedly come across coastal plants growing right next to desert plants.
This page is just a beginning of the flora of this area, since despite the large number of vouchers from this area, they all come from a very small portion of it. The two surveys we have done hardly even scratch the surface of the diversity here.
Yet even with the current incompleteness of the plant list here, this area is one of the more diverse areas for native plants in southern California, with 26% more species than is predicted from the best fit to the species - area relation for various places in southern California. This is a direct result of having abundant water, and by the mix of coastal, desert transition, and desert species.
There is much more work to be done on this flora, and much more fun to be had.
Unfortunately, the flora of this area also contains a brand-new-to-southern California, very-invasive annual grass that has taken over large areas on the open alluvial plain areas here, Stipa capensis, spear needlegrass (aka "cape needlegrass", "Mediterranean steppegrass", "twisted-awned speargrass", and "cape ricegrass"). This grass has even colonized areas along Tahquitz Creek. See Kate's 360° video panorama showing how extensively this grass has taken over here in places (click on the photo to begin the movie).
If you botanize here, make sure you remove all the seeds of this grass from your socks, shoes and pants before going elsewhere! Remember, the Coachella Valley is the same place that brought us the horrible scourge of Saharan Mustard, Brassica tournefortii. Don't help another invader spread!
The following map shows the location of the lower elevations of Palm, Andreas, Murray and Tahquitz Canyons, with georeferenced voucher locations marked with blue diamonds:
Fig. 4. Topographic map showing location of the lower elevations of Palm, Andreas, Murray and Tahquitz Canyons, with georeferenced voucher locations marked with blue diamonds.
Procedure For Compiling The Checklist
The Checklist was compiled by the first author from online vouchers; from field work done on 16 November 2010 by the first two authors; and from field work done on 6 April 2011 by all the authors.
The vouchers were obtained from five separate searches of the Consortium of California Herbaria on 18 November 2010:
- Georeferenced vouchers were searched between 33.75° and 33.82° N. latitude, and -116.52 and -116.58 E. longitude.
- Additional searches were made for all vouchers (not just georeferenced vouchers) that had the words Andreas Canyon, Palm Canyon, Murray Canyon or Tahquitz Palm in their locality field.
Duplicate vouchers were removed. The locality of each voucher was examined to rule out vouchers above 3000 feet elevation, vouchers that were out of this area, or vouchers from the urban area of Palm Springs.
Coordinates of the vouchers were then examined, and a few vouchers were removed that were outside this area.
The species list from the vouchers was then culled to remove species names that probably do not exist here, either because the location was not precise enough to be sure that the voucher was taken from the targeted area, or because the species determination on the voucher was unlikely to be correct. The rejected species are detailed below.
The online voucher determination of Gilia caruifolia was changed to G. stellata in the voucher list below, since that is the latest determination given on the voucher sheet. See Gilias of Lowermost Tahquitz Canyon.
Vouchers determined only to the species level were removed, and vouchers of a species and its subspecies were combined when there was only one plausible subspecies.
The above procedure resulted in a total of 349 taxa from 1,145 vouchers.
The dominant collectors, those with over 30 vouchers, are given in Table 1.
Table 1. Dominant Voucher Collectors
# Vouchers % of Total Name 175 15% F. W. Peirson 166 14% I. M. Johnston 120 10% N. R. Zabriskie, W. M. Zabriskie 79 7% W. L. Jepson (most with H. M. Hall) 60 5% N. C. Cooper 51 4% A. C. Sanders (most with G. K. Helmkamp) 43 4% P. A. Munz 40 3% F. M. Reed 31 3% Mary F. Spencer
Fig. 5. Topographic map showing locations of the first two field surveys. The two trails in red were surveyed in detail on 6 April 2011; Tahquitz Canyon is the northernmost trail, with the southernmost trail from the mouth of Andreas Canyon to the mouth of Murray Canyon. The trail in yellow was part of an additional cursory survey on 16 November 2010 in Palm Canyon proper. See Fig. 4 for a map of a larger area containing these surveys.
The field work on 16 November 2010 by Tom Chester and Robert Hepburn was very cursory, and done primarily when hiking, not botanizing. Taxa were noted mostly from memory several days later. Due to the time of year, most of the noted taxa were shrubs. Nonetheless, a total of 71 taxa were noted, including 21 taxa that are not present in the voucher list.
The field work on 6 April 2011 was done by Tom Chester, Robert Hepburn, James Dillane, Kate Harper, Dave Stith, and Pam Pallette. A comprehensive survey was done from the southern end of the parking area at Andreas Canyon to the lowermost portion of Murray Canyon, followed by a more cursory survey of Tahquitz Canyon along the trail from the parking lot to the waterfall. Estimates of the plant abundances for the entire survey area were made only in the next several days after the trip, so the estimates are probably low for a number of species.
This survey found an amazing 171 taxa, including 37 taxa not present in the voucher list. Of those 37 taxa, 24 were species not seen in the 16 November 2010 survey, and were thus new additions to the Checklist.
The field work on 14 December 2017 was done by Keir Morse and Tom Chester, on our hike down the lower part of the Jo Pond and West Fork Trail, after surveying the trail for Malacothamnus densiflorus. This survey was done fairly hurriedly, since we were running out of time at the end of the day, and the lowermost part of the trail had to be skipped. That survey recorded 79 taxa, of which 23, 29% of the total, were not on the voucher list. Of those 23, nine had not been seen in any of our previous surveys, and so were new additions to the Checklist.
The total checklist below contains 404 taxa. Of those, 200 were present only from vouchers; 145 were present both in our surveys and in vouchers; and 59 species were only found in our surveys. The dominance of taxa found only in vouchers fits expectations since we have surveyed only a miniscule portion of the area covered by vouchers. However, finding that 27% to 29% of the taxa in our surveys were not on the voucher list was unexpected, since it had seemed to us, from the number of vouchers, that this area had been heavily botanized in the past.
Please note the following important caveats about this preliminary Checklist:
- We have not looked at any of the vouchers yet, so we cannot vouch for their determinations. We have checked only the names of the taxa to make sure it was not unreasonable for them to occur here.
- The voucher taxon list is a very preliminary first draft, compiled quickly and without review by other knowledgeable botanists, and so well may contain bonehead errors.
- A few of the species from our surveys were not fully identified, usually due to lack of flowers. Those uncertain determinations are noted in the Checklist.
- Notes on the Scientific Names Used At This Site and
- Information about the links from the Scientific Name and Common Name.
The column with header Fam gives the first three letters of the Jepson Manual Second Edition Family.
An asterisk before the common name indicates a non-native species.
The column #Pls gives the minimum number of plants found in two areas. The first column, with header WF, gives the number of plants observed on a 14 December 2017 survey by Keir Morse and Tom Chester. The second column, with header MT, gives the number of plants found in the 6 April 2011 survey of Tahquitz Canyon from the parking lot to the waterfall, and in the southern end of the parking area at Andreas Canyon to the lowermost portion of Murray Canyon.
Many species are undoubtedly more abundant than are indicated by our minimum numbers, both due to our limitations in remembering how many plants of each species we saw for sure, and because surveys at other times of year might find more plants. The maximum number of plants estimated is 99.
A "~" in front of the number indicates that the taxon was not fully identified, usually due to lack of flowers, and hence our determination may not be correct. For Adiantum capillus-veneris, the uncertainty is because the plants are inaccessible on the rock cliffs of Tahquitz Waterfall, and were only seen from a distance.
Additional species seen in Tahquitz Canyon on 16 November 2010, or found by Robert Hepburn afterward, are marked with a T in this column, with one species found at Murray Spring by Robert Hepburn marked with a M. Additional taxa noted on 16 November 2010 in Palm Canyon immediately above the Trading Post, and at the mouth of Andreas Canyon, that are not on the voucher checklist, are marked with an X in this column.
The third column (#V) gives the number of vouchers for this entire area for each taxon truncated at a maximum value of 9.
See also the list of rejected species given below.
Version for printing, without lines and other text on this page: html (11 pages) or pdf Clickbook booklet (3 double-sided pages). (See printing instructions for an explanation of these options)
# Fam Scientific Name
Link goes to the Jepson eflora
Link goes to Calphotos
#V #Pls WF MT Lycopods 1 Sel Selaginella bigelovii Bigelow's spike-moss 7 99 1 2 Sel Selaginella eremophila desert spike-moss 9 20 3 Ferns 3 Ble Woodwardia fimbriata giant chain fern 3 4 Equ Equisetum laevigatum smooth scouring rush 2 5 Pte Adiantum capillus-veneris maidenhair fern 8 5 6 Pte Cheilanthes covillei beady lipfern 9 5 7 Pte Cheilanthes covillei X C. parryi teensy lipfern 2 8 Pte Cheilanthes parryi woolly lipfern 9 5 30 9 Pte Cheilanthes viscida sticky lipfern 9 10 Pte Notholaena californica ssp. leucophylla California cloak fern 9 30 11 Pte Pellaea andromedifolia coffee fern 4 12 Pte Pellaea mucronata var. mucronata bird's-foot fern 5 10 13 Pte Pentagramma triangularis ssp. maxonii Maxon's silverback fern 9 1 10 14 The Thelypteris puberula var. sonorensis Sonoran maiden fern 2 Gymnosperms 15 Cup Juniperus californica California juniper 4 16 Eph Ephedra aspera Mormon tea 4 1 ~5 17 Eph Ephedra californica desert tea 5 2 18 Eph Ephedra nevadensis Nevada ephedra 1 19 Eph Ephedra viridis green ephedra 1 Eudicots 20 Aca Justicia californica chuparosa 9 99 21 Ama Amaranthus fimbriatus fringed amaranth 5 22 Ana Rhus ovata sugar bush 2 20 23 Ana Searsia lancea *African Sumac 5 24 Api Daucus pusillus rattlesnake weed 1 25 Api Tauschia arguta southern tauschia 1 26 Apo Funastrum cynanchoides var. hartwegii climbing milkweed 6 20 30 27 Apo Funastrum hirtellum rambling milkweed 3 28 Ast Acamptopappus sphaerocephalus var. sphaerocephalus goldenhead 3 29 Ast Adenophyllum porophylloides San Felipe dogweed 5 10 10 30 Ast Almutaster pauciflorus marsh alkali aster 1 31 Ast Ambrosia dumosa burroweed 8 40 50 32 Ast Ambrosia monogyra leafy burrobrush 1 33 Ast Ambrosia psilostachya western ragweed 1 20 34 Ast Ambrosia salsola var. salsola cheesebush 8 40 35 Ast Anthemis cotula *dog-fennel 1 36 Ast Artemisia californica California sagebrush 2 37 Ast Artemisia dracunculus wild tarragon 30 38 Ast Artemisia ludoviciana ssp. albula white mugwort 1 39 Ast Artemisia ludoviciana ssp. incompta mountain mugwort 2 2 40 Ast Baccharis salicifolia ssp. salicifolia mule fat 6 T 41 Ast Baccharis sergiloides desert baccharis 2 1 30 42 Ast Bahiopsis parishii Parish's goldeneye 9 99 10 43 Ast Baileya pauciradiata Colorado Desert marigold 1 44 Ast Bebbia juncea var. aspera sweetbush 6 40 30 45 Ast Brickellia atractyloides var. arguta California spear-leaved brickellia 1 46 Ast Brickellia californica California brickellbush 1 47 Ast Brickellia desertorum desert brickellia 3 48 Ast Centaurea melitensis *tocalote 1 49 Ast Chaenactis carphoclinia var. carphoclinia pebble pincushion 1 50 Ast Chaenactis fremontii Fremont pincushion 5 99 51 Ast Encelia actoni Acton encelia 40 52 Ast Encelia farinosa brittlebush 7 99 99 53 Ast Ericameria linearifolia narrowleaf goldenbush 1 54 Ast Erigeron canadensis horseweed 5 55 Ast Erigeron divergens spreading fleabane 1 56 Ast Eriophyllum ambiguum var. paleaceum annual woolly sunflower 6 57 Ast Gutierrezia californica California matchweed 4 58 Ast Gutierrezia sarothrae matchweed 3 20 1 59 Ast Helianthus annuus annual sunflower 20 60 Ast Helianthus petiolaris ssp. canescens gray desert sunflower 1 61 Ast Isocoma acradenia var. eremophila toothed-leaved alkali goldenbush 2 10 62 Ast Lactuca serriola *prickly lettuce T 63 Ast Lasthenia gracilis goldfields 1 64 Ast Lasthenia microglossa small-rayed goldfields 1 65 Ast Lepidospartum squamatum scale-broom 1 66 Ast Logfia arizonica Arizona herba impia 1 67 Ast Logfia filaginoides California filago 4 50 68 Ast Malacothrix glabrata desert dandelion 3 5 69 Ast Malacothrix stebbinsii Stebbins' malacothrix 1 70 Ast Monoptilon bellioides desert star 6 71 Ast Palafoxia arida var. arida Spanish needle 4 72 Ast Perityle emoryi Emory's rock-daisy 9 5 99 73 Ast Peucephyllum schottii pygmy-cedar 5 74 Ast Pleurocoronis pluriseta arrow-leaf 9 10 10 75 Ast Pluchea sericea arrow-weed 6 5 76 Ast Porophyllum gracile odora 1 77 Ast Pseudognaphalium biolettii bicolored everlasting 2 10 78 Ast Pseudognaphalium californicum California everlasting 1 79 Ast Pseudognaphalium luteoalbum *common cudweed 1 1 80 Ast Pulicaria paludosa *Spanish false-fleabane 1 T 81 Ast Rafinesquia californica California chicory 1 10 82 Ast Rafinesquia neomexicana desert chicory 1 10 83 Ast Senecio mohavensis Mojave ragwort 1 84 Ast Solidago velutina ssp. californica goldenrod 20 85 Ast Sonchus oleraceus *sow thistle 5 86 Ast Stephanomeria exigua ssp. exigua slender wreathplant 2 87 Ast Stephanomeria pauciflora wire-lettuce 4 5 88 Ast Stylocline gnaphaloides everlasting nest-straw 1 99 89 Ast Stylocline psilocarphoides Peck's stylocline 1 10 90 Ast Trichoptilium incisum yellow-head 5 91 Ast Trixis californica var. californica California trixis 9 2 10 92 Ast Uropappus lindleyi silver puffs 1 5 93 Ast Xanthium strumarium cocklebur 3 20 94 Bet Alnus rhombifolia white alder 5 95 Big Chilopsis linearis ssp. arcuata desert-willow 9 1 96 Bor Amsinckia intermedia common fiddleneck 2 99 97 Bor Amsinckia tessellata var. tessellata bristly fiddleneck 3 98 Bor Cryptantha angustifolia narrow-leaved cryptantha 1 99 99 Bor Cryptantha barbigera bearded cryptantha 9 20 100 Bor Cryptantha barbigera var. fergusoniae Santa Rosa Mountain bearded cryptantha 1 101 Bor Cryptantha costata ribbed cryptantha 1 102 Bor Cryptantha decipiens gravel cryptantha 10 103 Bor Cryptantha intermedia var. intermedia popcorn flower 1 99 104 Bor Cryptantha maritima Guadalupe cryptantha 2 105 Bor Cryptantha racemosa bushy cryptantha 3 106 Bor Cryptantha utahensis scented cryptantha 4 30 107 Bor Emmenanthe penduliflora var. penduliflora whispering bells 5 30 108 Bor Eriodictyon crassifolium var. crassifolium thick-leaved yerba santa 8 99 20 109 Bor Eriodictyon parryi poodle-dog bush 1 110 Bor Eucrypta chrysanthemifolia var. bipinnatifida eucrypta 3 40 111 Bor Eucrypta micrantha desert eucrypta 1 112 Bor Nama demissa var. demissa purple mat 2 113 Bor Nemophila menziesii baby blue eyes 1 114 Bor Pectocarya heterocarpa chuckwalla pectocarya 1 115 Bor Pectocarya penicillata combseed 1 10 116 Bor Pectocarya platycarpa broad-fruited combseed 1 117 Bor Pectocarya recurvata curvenut combseed 4 30 118 Bor Phacelia campanularia desert bluebells 1 119 Bor Phacelia cicutaria var. hispida caterpillar phacelia 2 50 120 Bor Phacelia crenulata var. ambigua heliotrope phacelia 2 121 Bor Phacelia cryptantha limestone phacelia 1 122 Bor Phacelia distans common phacelia 5 99 123 Bor Phacelia minor wild canterbury bells 3 40 124 Bor Phacelia pedicellata pedicellate phacelia 1 125 Bor Phacelia ramosissima branching phacelia 1 126 Bor Pholistoma membranaceum white fiesta flower 9 99 127 Bor Tiquilia palmeri Palmer's coldenia 1 128 Bra Athysanus pusillus dwarf athysanus 5 129 Bra Boechera californica California elegant rock-cress ~1 130 Bra Boechera perennans perennial rock-cress 2 15 131 Bra Boechera pulchra, B. xylopoda beautiful rock-cress 1 132 Bra Brassica tournefortii *Sahara mustard 20 133 Bra Caulanthus cooperi Cooper's jewel-flower 1 134 Bra Descurainia pinnata western tansy-mustard 1 2 135 Bra Hornungia procumbens prostrate hutchinsia 2 136 Bra Lepidium lasiocarpum ssp. lasiocarpum hairy-podded pepper-grass 3 99 50 137 Bra Nasturtium officinale water cress 50 138 Bra Sisymbrium altissimum *tumble-mustard 1 139 Bra Sisymbrium irio *London rocket 50 140 Bra Sisymbrium orientale *Oriental mustard 20 141 Bra Thysanocarpus curvipes fringe-pod 5 20 142 Bra Thysanocarpus laciniatus lace-pod 1 143 Bra Tropidocarpum gracile slender tropidocarpum 1 T 144 Cac Cylindropuntia bigelovii teddy-bear cholla 50 145 Cac Cylindropuntia echinocarpa silver cholla X 146 Cac Cylindropuntia ganderi Gander's cholla 99 10 147 Cac Echinocereus engelmannii Engelmann's hedgehog cactus 4 3 148 Cac Ferocactus cylindraceus California barrel cactus 1 20 5 149 Cac Mammillaria tetrancistra desert fish-hook cactus 2 1 150 Cac Opuntia basilaris var. basilaris beavertail cactus 40 2 151 Cac Opuntia phaeacantha desert prickly-pear 1 152 Cam Lobelia cardinalis var. pseudosplendens cardinal flower 2 153 Cam Nemacladus glanduliferus var. glanduliferus, var. orientalis glandular nemacladus 2 154 Cam Nemacladus orientalis eastern glandular nemacladus 1 155 Cam Nemacladus tenuis var. tenuis desert threadplant 2 156 Car Cerastium glomeratum *mouse-ear chickweed 2 157 Car Herniaria hirsuta var. cinerea *grey herniaria 2 158 Car Loeflingia squarrosa spreading loeflingia 1 159 Car Sagina apetala *dwarf pearlwort 3 160 Car Sagina decumbens ssp. occidentalis western pearlwort 1 161 Car Silene antirrhina snapdragon campion 3 162 Car Stellaria pallida *pale starwort 2 163 Che Atriplex canescens var. linearis narrow-leaf four-wing saltbush 5 2 164 Che Atriplex lentiformis ssp. lentiformis big saltbush X 165 Che Chenopodium atrovirens forest goosefoot 1 166 Che Chenopodium murale *nettle-leaved goosefoot 10 167 Che Salsola tragus *Russian thistle 1 168 Cle Peritoma arborea bladderpod 5 169 Con Cuscuta californica California dodder 2 170 Cra Crassula connata pygmy-weed 3 99 171 Cra Dudleya saxosa ssp. aloides desert dudleya 2 10 172 Cro Crossosoma bigelovii rock crossosoma 7 173 Cuc Cucurbita palmata coyote melon 1 174 Cuc Marah macrocarpa wild-cucumber 2 1 175 Dat Datisca glomerata Durango root 3 176 Eup Chamaesyce arizonica Arizona spurge 1 177 Eup Chamaesyce polycarpa small-seeded spurge 9 99 50 178 Eup Chamaesyce setiloba starfish (Yuma) spurge 1 179 Eup Croton californicus California croton 6 180 Eup Ditaxis lanceolata narrowleaf ditaxis 2 10 30 181 Eup Ditaxis neomexicana New Mexico ditaxis 3 182 Eup Euphorbia eriantha beetle spurge 2 183 Eup Stillingia linearifolia linear-leaved stillingia 1 184 Fab Acmispon americanus var. americanus Spanish clover 20 185 Fab Acmispon argophyllus var. argophyllus southern California silver-lotus 6 186 Fab Acmispon glaber var. brevialatus short-winged deerweed 2 99 10 187 Fab Acmispon heermannii var. heermannii silky lotus 3 10 188 Fab Acmispon maritimus var. brevivexillus short-bannered coastal lotus 1 1 189 Fab Acmispon micranthus San Diego birdsfoot lotus 2 30 190 Fab Acmispon rigidus desert lotus 9 1 191 Fab Acmispon strigosus strigose lotus 2 2 192 Fab Amorpha californica var. californica California false-indigo 1 193 Fab Amorpha fruticosa western false-indigo 2 5 194 Fab Astragalus coccineus scarlet milk-vetch 1 195 Fab Astragalus douglasii var. parishii Parish' Jacumba milk-vetch 2 196 Fab Astragalus lentiginosus freckled milk-vetch 1 197 Fab Astragalus nuttallianus var. cedrosensis Cedros milk-vetch 2 3 198 Fab Astragalus nuttallianus var. imperfectus turkey-peas 1 199 Fab Astragalus palmeri Palmer's milk-vetch 2 200 Fab Astragalus pomonensis Pomona locoweed 1 201 Fab Hoffmannseggia microphylla wand holdback 1 202 Fab Hosackia oblongifolia var. oblongifolia streambank lotus 2 203 Fab Lupinus arizonicus Arizona lupine 5 204 Fab Lupinus concinnus bajada lupine 2 20 205 Fab Lupinus sparsiflorus Coulter's lupine 1 206 Fab Lupinus truncatus collar lupine 1 207 Fab Melilotus indicus *sourclover 50 208 Fab Parkinsonia florida blue palo verde 1 10 209 Fab Prosopis glandulosa var. torreyana honey mesquite 6 30 210 Fab Prosopis pubescens screw-bean mesquite 3 211 Fab Psorothamnus arborescens var. simplicifolius California indigo-bush 2 212 Fab Psorothamnus emoryi Emory's indigo-bush 2 213 Fab Psorothamnus schottii indigo bush 2 1 10 214 Fab Psorothamnus spinosus smoke tree 1 215 Fab Senegalia greggii catclaw 6 99 30 216 Fab Trifolium microcephalum small-head field clover 1 217 Fab Trifolium variegatum variegated clover 2 218 Fag Quercus agrifolia coast live oak 1 219 Fag Quercus wislizeni var. frutescens interior live oak 1 220 Gen Eustoma exaltatum ssp. exaltatum catchfly prairie-gentian 2 221 Gen Zeltnera exaltata desert centaury 1 222 Gen Zeltnera venusta canchalagua 2 223 Ger Erodium cicutarium *redstem filaree 50 224 Ger Erodium texanum Texas filaree 1 225 Ger Geranium carolinianum Carolina geranium 1 10 226 Gro Ribes indecorum white-flowering currant 1 227 Kra Krameria bicolor white rhatany 7 2 10 228 Kra Krameria erecta Pima rhatany 2 99 229 Lam Hyptis emoryi desert-lavender 9 5 20 230 Lam Salvia apiana white sage 2 10 10 231 Lam Salvia columbariae chia 5 2 232 Lam Salvia vaseyi Vasey's sage 2 233 Lam Scutellaria mexicana Mexican bladder sage 5 234 Lam Stachys rigida rigid hedge-nettle 10 235 Lam Stachys stricta Sonoma hedge-nettle 1 236 Lam Trichostema parishii Parish's bluecurls 1 237 Loa Mentzelia involucrata bracted blazing star 3 5 238 Loa Petalonyx thurberi ssp. thurberi Thurber's sandpaper-plant 5 239 Lyt Lythrum californicum California loosestrife 1 240 Mal Ayenia compacta ayenia 6 241 Mal Eremalche exilis white mallow 4 242 Mal Hibiscus denudatus rock hibiscus 8 10 2 243 Mal Malacothamnus densiflorus yellow-stem bush mallow 1 99 244 Mal Sphaeralcea ambigua apricot mallow 3 99 245 Mal Sphaeralcea ambigua var. ambigua apricot mallow 8 50 246 Mal Sphaeralcea ambigua var. rosacea rosy apricot mallow 9 247 Mal Sphaeralcea ambigua var. rugosa desert globemallow 1 248 Mon Calyptridium monandrum sand cress 1 249 Mon Claytonia parviflora ssp. parviflora narrow-leaved miner's lettuce 2 1 250 Myr Anagallis arvensis *scarlet pimpernel 1 251 Nyc Abronia villosa var. aurita hairy sand verbena 1 252 Nyc Allionia incarnata trailing four o'clock 8 253 Nyc Boerhavia coccinea scarlet spiderling 5 1 254 Nyc Boerhavia triquetra var. intermedia fivewing spiderling 99 255 Nyc Mirabilis laevis var. retrorsa Bigelow's desert four-o'clock 4 10 10 256 Nyc Mirabilis laevis var. villosa Bigelow's desert four-o'clock 3 257 Nyc Mirabilis multiflora var. pubescens giant four o'clock 1 258 Nyc Mirabilis tenuiloba slender-lobed four o'clock 3 25 259 Ole Forestiera pubescens desert olive 1 260 Ona Camissonia strigulosa strigose suncup 1 261 Ona Camissoniopsis pallida ssp. pallida pale suncup 6 50 262 Ona Chylismia cardiophylla ssp. cardiophylla heartleaf suncup 3 2 263 Ona Chylismia claviformis ssp. aurantiaca brown-eyed primrose 2 10 264 Ona Clarkia epilobioides canyon clarkia 1 265 Ona Epilobium canum ssp. latifolium mountain California-fuchsia 3 30 266 Ona Eremothera boothii ssp. condensata Booth's evening primrose 2 267 Ona Eremothera chamaenerioides long-fruit suncup 2 268 Ona Eulobus californicus California suncup 1 99 5 269 Ona Gayophytum heterozygum zig-zag gayophytum 1 270 Ona Oenothera elata ssp. hirsutissima Hooker's evening-primrose 5 271 Oro Castilleja foliolosa woolly Indian paintbrush 2 272 Oro Castilleja minor ssp. spiralis lesser paintbrush 1 10 273 Oro Orobanche fasciculata clustered broomrape 1 274 Pap Argemone munita prickly poppy 1 1 275 Pap Eschscholzia caespitosa tufted eschscholzia 1 276 Pap Eschscholzia minutiflora ssp. minutiflora small-flowered poppy 2 10 277 Pap Eschscholzia parishii Parish's poppy 6 278 Phr Mimulus bigelovii var. bigelovii Bigelow's monkeyflower 2 279 Phr Mimulus guttatus common monkeyflower 4 75 280 Phr Mimulus parishii Parish's monkeyflower 1 281 Phr Mimulus pilosus false monkeyflower 1 282 Pla Antirrhinum filipes desert twining snapdragon 4 283 Pla Keckiella antirrhinoides var. microphylla little-leaved chaparral beardtongue 1 284 Pla Mohavea confertiflora ghost flower 1 285 Pla Penstemon clevelandii var. connatus San Jacinto beardtongue 4 286 Pla Plantago ovata desert plantain 3 10 10 287 Pla Plantago patagonica Patagonia plantain 3 288 Pla Stemodia durantifolia white-woolly stemodia 9 289 Pla Veronica anagallis-aquatica *water speedwell 1 290 Pla Veronica arvensis *corn speedwell 1 291 Pla Platanus racemosa western sycamore 7 5 292 Pol Aliciella latifolia ssp. latifolia broad-leaf gilia 1 293 Pol Eriastrum diffusum miniature woolly-star 3 294 Pol Eriastrum eremicum ssp. eremicum desert woolly-star 1 20 295 Pol Gilia angelensis angel's gilia 4 40 296 Pol Gilia stellata star gilia 4 2 297 Pol Langloisia setosissima ssp. setosissima bristly langloisia 1 298 Pol Linanthus jonesii Jones' linanthus 1 299 Pol Loeseliastrum schottii Schott's calico 1 300 Pol Saltugilia australis southern gilia 5 20 301 Pol Chorizanthe brevicornu var. brevicornu brittle spineflower 2 10 302 Pol Eriogonum elongatum var. elongatum long-stemmed buckwheat 5 303 Pol Eriogonum fasciculatum var. polifolium California buckwheat 6 50 5 304 Pol Eriogonum inflatum desert trumpet 4 2 10 305 Pol Eriogonum thurberi Thurber's buckwheat 1 306 Pol Eriogonum trichopes little desert trumpet 1 307 Pol Eriogonum wrightii var. nodosum Wright's buckwheat 8 5 2 308 Pol Pterostegia drymarioides fairy bowties, threadstem 20 309 Ran Clematis pauciflora virgin's bower 1 1 310 Ran Delphinium parishii ssp. parishii Parish's larkspur 9 10 311 Ran Ranunculus cymbalaria Rocky Mountain buttercup 1 312 Rha Ziziphus parryi var. parryi lotebush 9 1 313 Ros Adenostoma fasciculatum chamise 20 314 Ros Prunus fasciculata var. fasciculata desert almond 1 315 Ros Prunus fremontii desert apricot 9 40 10 316 Ros Rubus armeniacus *Himalaya blackberry ~M 317 Rub Galium angustifolium ssp. angustifolium narrowleaf bedstraw 1 3 318 Rub Galium angustifolium ssp. gracillimum slender bedstraw 1 319 Rub Galium aparine common bedstraw 20 320 Rub Galium stellatum star-flowered bedstraw 6 321 Sal Populus fremontii ssp. fremontii Fremont cottonwood 3 2 322 Sal Salix exigua var. exigua narrowleaf willow 3 5 323 Sal Salix gooddingii black willow 3 1 324 Sal Salix laevigata red willow 2 325 Sap Acer macrophyllum bigleaf maple 1 326 Sax Jepsonia parryi coast jepsonia 1 327 Sim Simmondsia chinensis jojoba 6 20 1 328 Sol Datura wrightii sacred datura 20 3 329 Sol Lycium andersonii Anderson's boxthorn 6 2 20 330 Sol Lycium brevipes var. brevipes desert boxthorn 1 331 Sol Lycium torreyi Torrey's boxthorn 2 332 Sol Nicotiana attenuata coyote tobacco 1 333 Sol Nicotiana obtusifolia desert tobacco 9 10 334 Sol Physalis crassifolia thick-leaved ground cherry 5 3 1 335 Sol Solanum douglasii white nightshade 4 1 336 Tam Tamarix aphylla *athel 1 337 Tam Tamarix ramosissima *saltcedar 1 338 Urt Parietaria hespera var. hespera pellitory 6 50 339 Urt Parietaria pensylvanica Pennsylvania pellitory 2 340 Vis Phoradendron californicum desert mistletoe 8 2 30 341 Vit Vitis girdiana wild grape 4 99 342 Zyg Fagonia laevis California fagonia 4 343 Zyg Larrea tridentata creosote bush 8 20 50 Monocots 344 Aga Agave deserti var. deserti desert agave 1 345 Aga Hesperoyucca whipplei chaparral yucca 20 346 Aga Yucca schidigera Mohave yucca 5 5 347 All Allium marvinii Yucaipa onion 1 348 Ara Lemna minuta duckweed 1 349 Are Washingtonia filifera California fan palm 1 65 350 Cyp Carex alma sturdy sedge 2 351 Cyp Cyperus involucratus *umbrella plant 8 10 352 Cyp Cyperus squarrosus bearded flatsedge 1 353 Cyp Eleocharis geniculata bent spikerush 6 354 Cyp Eleocharis parishii Parish's spikerush 9 355 Cyp Schoenoplectus americanus American tule 6 356 Jun Juncus acutus ssp. leopoldii spiny rush 4 357 Jun Juncus bufonius toad rush 1 358 Jun Juncus mexicanus Mexican rush X 359 Jun Juncus rugulosus wrinkled rush 1 360 Jun Juncus xiphioides iris-leaved rush 3 1 361 Lil Calochortus concolor golden-bowl mariposa T 362 Orc Epipactis gigantea stream orchid 9 363 Poa Agrostis exarata spike bentgrass 1 364 Poa Andropogon glomeratus var. scabriglumis southwestern bushy bluestem 4 365 Poa Aristida adscensionis six-weeks three-awn 5 99 10 366 Poa Aristida purpurea purple three-awn 30 10 367 Poa Aristida purpurea var. nealleyi Nealley three-awn 3 368 Poa Aristida purpurea var. parishii Parish three-awn 1 369 Poa Avena barbata *slender wild oats 20 370 Poa Bothriochloa barbinodis cane bluestem 3 371 Poa Bromus berteroanus Chilean chess 5 372 Poa Bromus carinatus var. carinatus California brome 1 40 373 Poa Bromus diandrus *ripgut brome 1 99 374 Poa Bromus hordeaceus *soft chess 1 15 375 Poa Bromus madritensis ssp. rubens *red brome 5 99 99 376 Poa Bromus tectorum *downy brome 99 30 377 Poa Cenchrus longispinus *mat sandbur 1 378 Poa Cynodon dactylon *Bermuda grass 2 10 379 Poa Dactyloctenium aegyptium *crows-foot grass 3 380 Poa Dasyochloa pulchella fluff grass 2 381 Poa Distichlis spicata saltgrass 10 382 Poa Festuca bromoides *brome fescue 1 30 383 Poa Festuca myuros *rattail fescue 3 384 Poa Festuca octoflora six-weeks fescue 4 385 Poa Hilaria rigida big galleta 5 40 50 386 Poa Hordeum murinum *foxtail barley 99 387 Poa Hordeum murinum ssp. glaucum *foxtail barley 1 388 Poa Imperata brevifolia satintail 1 389 Poa Melica frutescens tall melica 2 390 Poa Muhlenbergia microsperma littleseed muhly 3 10 391 Poa Muhlenbergia rigens deergrass 10 392 Poa Pennisetum setaceum *fountain grass 99 99 393 Poa Poa bigelovii Bigelow's blue grass 6 394 Poa Poa secunda ssp. secunda one-sided bluegrass 10 395 Poa Polypogon monspeliensis *rabbits-foot grass 10 396 Poa Polypogon viridis *green bentgrass 1 397 Poa Schismus barbatus *Mediterranean schismus 1 99 398 Poa Stipa capensis *spear needlegrass 99 99 399 Poa Stipa coronata giant needlegrass 1 400 Poa Stipa lepida foothill needlegrass 3 401 Poa Stipa speciosa desert needlegrass 2 402 Rus Nolina parryi Parry's nolina 3 403 The Dichelostemma capitatum ssp. capitatum blue dicks 9 30 404 Typ Typha latifolia broadleaf cattail 1
Taxa Rejected From The Checklist
Taxa Rejected As Probably Waifs
Acrachne racemosa, UCR71763&. The Jepson Manual says that this taxon is either extirpated, lacking vouchers, or not considered naturalized.
Gossypium armourianum, JEPS102920. This is a cotton species native to Baja California, collected in 1995 from Palm Springs, ca. 1.5 mi S of jct of East Palm Canyon and South Palm Canyon. Andy Sanders wrote that There was an old agricultural extension station along the west side of the main road (Palm Cyn. Dr.) up toward Palm Canyon/Hermit Bench. These cotton plants are likely escapees from that. The Jepson Manual treatment says this species only persists from plantings in California.
Taxa Rejected Due To Uncertain Locations
The taxon name is linked to the online voucher record.
The following three species are higher-elevation taxa, from collections made by Jepson on a trip from Vandeventer Flat to Palm Canyon and back, and were probably collected in Palm Canyon above 3000 feet elevation, or from a Peirson trip along the Gordon Trail from Andreas Canyon to Mt. San Jacinto:
- Ceanothus greggii var. perplexans, RSA77714.
- Eriogonum davidsonii, JEPS56704;
- Monardella nana ssp. arida, JEPS63359.
Taxa Rejected Due To Probably-Incorrect Determinations
Allium haematochiton, UCR133190. This voucher was collected at San Jacinto Mtns. canyon above Palm Springs, which is not near other populations of Allium haematochiton, which is a coastal taxon. Perhaps this is actually A. marvinii, or perhaps the voucher was taken at an elevation higher than 3000 feet.
Amsinckia spectabilis, UC306211. This voucher is actually the type specimen for A. divaricata. The correct synonymy for this species is probably A. tessellatta, or perhaps A. menziesii var. intermedia, since A. spectabilis is an immediate-coastal species.
Cirsium neomexicanum, UC61517. This voucher is almost surely not Cirsium neomexicanum, which is only found in the eastern desert mountains.
Yucca baccata, JEPS46498. This voucher was determined in 1901, and its determination has apparently not been revisited since then. It is almost surely not Yucca baccata, which is only found in the eastern desert mountains near the Colorado River. This is probably Y. schidigera.
Voucher data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/consortium/).
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Last update: 16 December 2017