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



Procedure For Compiling The Checklist

Important Caveats


Taxa Rejected From The Checklist

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.

Voucher Records

The vouchers were obtained from five separate searches of the Consortium of California Herbaria on 18 November 2010:

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 TotalName
17515%F. W. Peirson
16614%I. M. Johnston
12010%N. R. Zabriskie, W. M. Zabriskie
797%W. L. Jepson (most with H. M. Hall)
605%N. C. Cooper
514%A. C. Sanders (most with G. K. Helmkamp)
434%P. A. Munz
403%F. M. Reed
313%Mary F. Spencer

Field Surveys

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.

Total 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.

Important Caveats

Please note the following important caveats about this preliminary Checklist:

Plant Checklist


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)

#FamScientific Name
Link goes to the Jepson eflora
(*)Common Name
Link goes to Calphotos
1SelSelaginella bigeloviiBigelow's spike-moss7991
2SelSelaginella eremophiladesert spike-moss9203
3BleWoodwardia fimbriatagiant chain fern3  
4EquEquisetum laevigatumsmooth scouring rush2  
5PteAdiantum capillus-venerismaidenhair fern8 5
6PteCheilanthes covilleibeady lipfern95 
7PteCheilanthes covillei X C. parryiteensy lipfern2  
8PteCheilanthes parryiwoolly lipfern9530
9PteCheilanthes viscidasticky lipfern9  
10PteNotholaena californica ssp. leucophyllaCalifornia cloak fern9 30
11PtePellaea andromedifoliacoffee fern4  
12PtePellaea mucronata var. mucronatabird's-foot fern510 
13PtePentagramma triangularis ssp. maxoniiMaxon's silverback fern9110
14TheThelypteris puberula var. sonorensisSonoran maiden fern2  
15CupJuniperus californicaCalifornia juniper4  
16EphEphedra asperaMormon tea41~5
17EphEphedra californicadesert tea 52
18EphEphedra nevadensisNevada ephedra1  
19EphEphedra viridisgreen ephedra1  
20AcaJusticia californicachuparosa9 99
21AmaAmaranthus fimbriatusfringed amaranth 5 
22AnaRhus ovatasugar bush220 
23AnaSearsia lancea*African Sumac5  
24ApiDaucus pusillusrattlesnake weed1  
25ApiTauschia argutasouthern tauschia1  
26ApoFunastrum cynanchoides var. hartwegiiclimbing milkweed62030
27ApoFunastrum hirtellumrambling milkweed3  
28AstAcamptopappus sphaerocephalus var. sphaerocephalusgoldenhead3  
29AstAdenophyllum porophylloidesSan Felipe dogweed51010
30AstAlmutaster pauciflorusmarsh alkali aster1  
31AstAmbrosia dumosaburroweed84050
32AstAmbrosia monogyraleafy burrobrush1  
33AstAmbrosia psilostachyawestern ragweed1 20
34AstAmbrosia salsola var. salsolacheesebush8 40
35AstAnthemis cotula*dog-fennel1  
36AstArtemisia californicaCalifornia sagebrush2  
37AstArtemisia dracunculuswild tarragon 30 
38AstArtemisia ludoviciana ssp. albulawhite mugwort1  
39AstArtemisia ludoviciana ssp. incomptamountain mugwort 22
40AstBaccharis salicifolia ssp. salicifoliamule fat6 T
41AstBaccharis sergiloidesdesert baccharis2130
42AstBahiopsis parishiiParish's goldeneye99910
43AstBaileya pauciradiataColorado Desert marigold1  
44AstBebbia juncea var. asperasweetbush64030
45AstBrickellia atractyloides var. argutaCalifornia spear-leaved brickellia1  
46AstBrickellia californicaCalifornia brickellbush1  
47AstBrickellia desertorumdesert brickellia3  
48AstCentaurea melitensis*tocalote1  
49AstChaenactis carphoclinia var. carphocliniapebble pincushion1  
50AstChaenactis fremontiiFremont pincushion5 99
51AstEncelia actoniActon encelia 40 
52AstEncelia farinosabrittlebush79999
53AstEricameria linearifolianarrowleaf goldenbush1  
54AstErigeron canadensishorseweed  5
55AstErigeron divergensspreading fleabane1  
56AstEriophyllum ambiguum var. paleaceumannual woolly sunflower6  
57AstGutierrezia californicaCalifornia matchweed4  
58AstGutierrezia sarothraematchweed3201
59AstHelianthus annuusannual sunflower  20
60AstHelianthus petiolaris ssp. canescensgray desert sunflower1  
61AstIsocoma acradenia var. eremophilatoothed-leaved alkali goldenbush2 10
62AstLactuca serriola*prickly lettuce  T
63AstLasthenia gracilisgoldfields1  
64AstLasthenia microglossasmall-rayed goldfields1  
65AstLepidospartum squamatumscale-broom1  
66AstLogfia arizonicaArizona herba impia1  
67AstLogfia filaginoidesCalifornia filago4 50
68AstMalacothrix glabratadesert dandelion3 5
69AstMalacothrix stebbinsiiStebbins' malacothrix1  
70AstMonoptilon bellioidesdesert star6  
71AstPalafoxia arida var. aridaSpanish needle4  
72AstPerityle emoryiEmory's rock-daisy9599
73AstPeucephyllum schottiipygmy-cedar5  
74AstPleurocoronis plurisetaarrow-leaf91010
75AstPluchea sericeaarrow-weed6 5
76AstPorophyllum gracileodora1  
77AstPseudognaphalium biolettiibicolored everlasting2 10
78AstPseudognaphalium californicumCalifornia everlasting1  
79AstPseudognaphalium luteoalbum*common cudweed1 1
80AstPulicaria paludosa*Spanish false-fleabane1 T
81AstRafinesquia californicaCalifornia chicory1 10
82AstRafinesquia neomexicanadesert chicory1 10
83AstSenecio mohavensisMojave ragwort1  
84AstSolidago velutina ssp. californicagoldenrod  20
85AstSonchus oleraceus*sow thistle  5
86AstStephanomeria exigua ssp. exiguaslender wreathplant 2 
87AstStephanomeria pauciflorawire-lettuce4 5
88AstStylocline gnaphaloideseverlasting nest-straw1 99
89AstStylocline psilocarphoidesPeck's stylocline1 10
90AstTrichoptilium incisumyellow-head5  
91AstTrixis californica var. californicaCalifornia trixis9210
92AstUropappus lindleyisilver puffs1 5
93AstXanthium strumariumcocklebur 320
94BetAlnus rhombifoliawhite alder5  
95BigChilopsis linearis ssp. arcuatadesert-willow9 1
96BorAmsinckia intermediacommon fiddleneck2 99
97BorAmsinckia tessellata var. tessellatabristly fiddleneck3  
98BorCryptantha angustifolianarrow-leaved cryptantha1 99
99BorCryptantha barbigerabearded cryptantha9 20
100BorCryptantha barbigera var. fergusoniaeSanta Rosa Mountain bearded cryptantha1  
101BorCryptantha costataribbed cryptantha1  
102BorCryptantha decipiensgravel cryptantha  10
103BorCryptantha intermedia var. intermediapopcorn flower1 99
104BorCryptantha maritimaGuadalupe cryptantha2  
105BorCryptantha racemosabushy cryptantha3  
106BorCryptantha utahensisscented cryptantha4 30
107BorEmmenanthe penduliflora var. penduliflorawhispering bells5 30
108BorEriodictyon crassifolium var. crassifoliumthick-leaved yerba santa89920
109BorEriodictyon parryipoodle-dog bush1  
110BorEucrypta chrysanthemifolia var. bipinnatifidaeucrypta3 40
111BorEucrypta micranthadesert eucrypta1  
112BorNama demissa var. demissapurple mat2  
113BorNemophila menziesiibaby blue eyes1  
114BorPectocarya heterocarpachuckwalla pectocarya1  
115BorPectocarya penicillatacombseed1 10
116BorPectocarya platycarpabroad-fruited combseed1  
117BorPectocarya recurvatacurvenut combseed4 30
118BorPhacelia campanulariadesert bluebells1  
119BorPhacelia cicutaria var. hispidacaterpillar phacelia2 50
120BorPhacelia crenulata var. ambiguaheliotrope phacelia2  
121BorPhacelia cryptanthalimestone phacelia1  
122BorPhacelia distanscommon phacelia5 99
123BorPhacelia minorwild canterbury bells3 40
124BorPhacelia pedicellatapedicellate phacelia1  
125BorPhacelia ramosissimabranching phacelia1  
126BorPholistoma membranaceumwhite fiesta flower9 99
127BorTiquilia palmeriPalmer's coldenia1  
128BraAthysanus pusillusdwarf athysanus  5
129BraBoechera californicaCalifornia elegant rock-cress ~1 
130BraBoechera perennansperennial rock-cress215 
131BraBoechera pulchra, B. xylopodabeautiful rock-cress1  
132BraBrassica tournefortii*Sahara mustard  20
133BraCaulanthus cooperiCooper's jewel-flower1  
134BraDescurainia pinnatawestern tansy-mustard1 2
135BraHornungia procumbensprostrate hutchinsia2  
136BraLepidium lasiocarpum ssp. lasiocarpumhairy-podded pepper-grass39950
137BraNasturtium officinalewater cress  50
138BraSisymbrium altissimum*tumble-mustard 1 
139BraSisymbrium irio*London rocket  50
140BraSisymbrium orientale*Oriental mustard  20
141BraThysanocarpus curvipesfringe-pod5 20
142BraThysanocarpus laciniatuslace-pod1  
143BraTropidocarpum gracileslender tropidocarpum1 T
144CacCylindropuntia bigeloviiteddy-bear cholla 50 
145CacCylindropuntia echinocarpasilver cholla  X
146CacCylindropuntia ganderiGander's cholla 9910
147CacEchinocereus engelmanniiEngelmann's hedgehog cactus 43
148CacFerocactus cylindraceusCalifornia barrel cactus1205
149CacMammillaria tetrancistradesert fish-hook cactus2 1
150CacOpuntia basilaris var. basilarisbeavertail cactus 402
151CacOpuntia phaeacanthadesert prickly-pear 1 
152CamLobelia cardinalis var. pseudosplendenscardinal flower2  
153CamNemacladus glanduliferus var. glanduliferus, var. orientalisglandular nemacladus2  
154CamNemacladus orientaliseastern glandular nemacladus1  
155CamNemacladus tenuis var. tenuisdesert threadplant2  
156CarCerastium glomeratum*mouse-ear chickweed2  
157CarHerniaria hirsuta var. cinerea*grey herniaria2  
158CarLoeflingia squarrosaspreading loeflingia1  
159CarSagina apetala*dwarf pearlwort3  
160CarSagina decumbens ssp. occidentaliswestern pearlwort1  
161CarSilene antirrhinasnapdragon campion3  
162CarStellaria pallida*pale starwort2  
163CheAtriplex canescens var. linearisnarrow-leaf four-wing saltbush5 2
164CheAtriplex lentiformis ssp. lentiformisbig saltbush  X
165CheChenopodium atrovirensforest goosefoot1  
166CheChenopodium murale*nettle-leaved goosefoot  10
167CheSalsola tragus*Russian thistle1  
168ClePeritoma arboreabladderpod5  
169ConCuscuta californicaCalifornia dodder2  
170CraCrassula connatapygmy-weed3 99
171CraDudleya saxosa ssp. aloidesdesert dudleya210 
172CroCrossosoma bigeloviirock crossosoma7  
173CucCucurbita palmatacoyote melon1  
174CucMarah macrocarpawild-cucumber2 1
175DatDatisca glomerataDurango root3  
176EupChamaesyce arizonicaArizona spurge1  
177EupChamaesyce polycarpasmall-seeded spurge99950
178EupChamaesyce setilobastarfish (Yuma) spurge1  
179EupCroton californicusCalifornia croton6  
180EupDitaxis lanceolatanarrowleaf ditaxis21030
181EupDitaxis neomexicanaNew Mexico ditaxis3  
182EupEuphorbia erianthabeetle spurge2  
183EupStillingia linearifolialinear-leaved stillingia1  
184FabAcmispon americanus var. americanusSpanish clover  20
185FabAcmispon argophyllus var. argophyllussouthern California silver-lotus6  
186FabAcmispon glaber var. brevialatusshort-winged deerweed29910
187FabAcmispon heermannii var. heermanniisilky lotus310 
188FabAcmispon maritimus var. brevivexillusshort-bannered coastal lotus1 1
189FabAcmispon micranthusSan Diego birdsfoot lotus2 30
190FabAcmispon rigidusdesert lotus91 
191FabAcmispon strigosusstrigose lotus2 2
192FabAmorpha californica var. californicaCalifornia false-indigo1  
193FabAmorpha fruticosawestern false-indigo2 5
194FabAstragalus coccineusscarlet milk-vetch1  
195FabAstragalus douglasii var. parishiiParish' Jacumba milk-vetch2  
196FabAstragalus lentiginosusfreckled milk-vetch1  
197FabAstragalus nuttallianus var. cedrosensisCedros milk-vetch2 3
198FabAstragalus nuttallianus var. imperfectusturkey-peas1  
199FabAstragalus palmeriPalmer's milk-vetch2  
200FabAstragalus pomonensisPomona locoweed1  
201FabHoffmannseggia microphyllawand holdback1  
202FabHosackia oblongifolia var. oblongifoliastreambank lotus2  
203FabLupinus arizonicusArizona lupine5  
204FabLupinus concinnusbajada lupine2 20
205FabLupinus sparsiflorusCoulter's lupine1  
206FabLupinus truncatuscollar lupine1  
207FabMelilotus indicus*sourclover  50
208FabParkinsonia floridablue palo verde1 10
209FabProsopis glandulosa var. torreyanahoney mesquite6 30
210FabProsopis pubescensscrew-bean mesquite3  
211FabPsorothamnus arborescens var. simplicifoliusCalifornia indigo-bush2  
212FabPsorothamnus emoryiEmory's indigo-bush2  
213FabPsorothamnus schottiiindigo bush2110
214FabPsorothamnus spinosussmoke tree1  
215FabSenegalia greggiicatclaw69930
216FabTrifolium microcephalumsmall-head field clover1  
217FabTrifolium variegatumvariegated clover2  
218FagQuercus agrifoliacoast live oak1  
219FagQuercus wislizeni var. frutescensinterior live oak  1
220GenEustoma exaltatum ssp. exaltatumcatchfly prairie-gentian2  
221GenZeltnera exaltatadesert centaury1  
222GenZeltnera venustacanchalagua2  
223GerErodium cicutarium*redstem filaree  50
224GerErodium texanumTexas filaree1  
225GerGeranium carolinianumCarolina geranium1 10
226GroRibes indecorumwhite-flowering currant  1
227KraKrameria bicolorwhite rhatany7210
228KraKrameria erectaPima rhatany299 
229LamHyptis emoryidesert-lavender9520
230LamSalvia apianawhite sage21010
231LamSalvia columbariaechia 52
232LamSalvia vaseyiVasey's sage2  
233LamScutellaria mexicanaMexican bladder sage5  
234LamStachys rigidarigid hedge-nettle  10
235LamStachys strictaSonoma hedge-nettle1  
236LamTrichostema parishiiParish's bluecurls1  
237LoaMentzelia involucratabracted blazing star3 5
238LoaPetalonyx thurberi ssp. thurberiThurber's sandpaper-plant5  
239LytLythrum californicumCalifornia loosestrife1  
240MalAyenia compactaayenia6  
241MalEremalche exiliswhite mallow4  
242MalHibiscus denudatusrock hibiscus8102
243MalMalacothamnus densiflorusyellow-stem bush mallow199 
244MalSphaeralcea ambiguaapricot mallow399 
245MalSphaeralcea ambigua var. ambiguaapricot mallow8 50
246MalSphaeralcea ambigua var. rosacearosy apricot mallow9  
247MalSphaeralcea ambigua var. rugosadesert globemallow1  
248MonCalyptridium monandrumsand cress1  
249MonClaytonia parviflora ssp. parvifloranarrow-leaved miner's lettuce2 1
250MyrAnagallis arvensis*scarlet pimpernel  1
251NycAbronia villosa var. auritahairy sand verbena1  
252NycAllionia incarnatatrailing four o'clock8  
253NycBoerhavia coccineascarlet spiderling5 1
254NycBoerhavia triquetra var. intermediafivewing spiderling 99 
255NycMirabilis laevis var. retrorsaBigelow's desert four-o'clock41010
256NycMirabilis laevis var. villosaBigelow's desert four-o'clock3  
257NycMirabilis multiflora var. pubescensgiant four o'clock1  
258NycMirabilis tenuilobaslender-lobed four o'clock3 25
259OleForestiera pubescensdesert olive1  
260OnaCamissonia strigulosastrigose suncup1  
261OnaCamissoniopsis pallida ssp. pallidapale suncup6 50
262OnaChylismia cardiophylla ssp. cardiophyllaheartleaf suncup3 2
263OnaChylismia claviformis ssp. aurantiacabrown-eyed primrose2 10
264OnaClarkia epilobioidescanyon clarkia1  
265OnaEpilobium canum ssp. latifoliummountain California-fuchsia3 30
266OnaEremothera boothii ssp. condensataBooth's evening primrose2  
267OnaEremothera chamaenerioideslong-fruit suncup2  
268OnaEulobus californicusCalifornia suncup1995
269OnaGayophytum heterozygumzig-zag gayophytum1  
270OnaOenothera elata ssp. hirsutissimaHooker's evening-primrose  5
271OroCastilleja foliolosawoolly Indian paintbrush2  
272OroCastilleja minor ssp. spiralislesser paintbrush1 10
273OroOrobanche fasciculataclustered broomrape1  
274PapArgemone munitaprickly poppy11 
275PapEschscholzia caespitosatufted eschscholzia1  
276PapEschscholzia minutiflora ssp. minutiflorasmall-flowered poppy2 10
277PapEschscholzia parishiiParish's poppy6  
278PhrMimulus bigelovii var. bigeloviiBigelow's monkeyflower2  
279PhrMimulus guttatuscommon monkeyflower4 75
280PhrMimulus parishiiParish's monkeyflower1  
281PhrMimulus pilosusfalse monkeyflower1  
282PlaAntirrhinum filipesdesert twining snapdragon4  
283PlaKeckiella antirrhinoides var. microphyllalittle-leaved chaparral beardtongue1  
284PlaMohavea confertifloraghost flower1  
285PlaPenstemon clevelandii var. connatusSan Jacinto beardtongue4  
286PlaPlantago ovatadesert plantain31010
287PlaPlantago patagonicaPatagonia plantain3  
288PlaStemodia durantifoliawhite-woolly stemodia9  
289PlaVeronica anagallis-aquatica*water speedwell1  
290PlaVeronica arvensis*corn speedwell1  
291PlaPlatanus racemosawestern sycamore7 5
292PolAliciella latifolia ssp. latifoliabroad-leaf gilia1  
293PolEriastrum diffusumminiature woolly-star3  
294PolEriastrum eremicum ssp. eremicumdesert woolly-star120 
295PolGilia angelensisangel's gilia4 40
296PolGilia stellatastar gilia4 2
297PolLangloisia setosissima ssp. setosissimabristly langloisia1  
298PolLinanthus jonesiiJones' linanthus1  
299PolLoeseliastrum schottiiSchott's calico1  
300PolSaltugilia australissouthern gilia5 20
301PolChorizanthe brevicornu var. brevicornubrittle spineflower2 10
302PolEriogonum elongatum var. elongatumlong-stemmed buckwheat  5
303PolEriogonum fasciculatum var. polifoliumCalifornia buckwheat6505
304PolEriogonum inflatumdesert trumpet4210
305PolEriogonum thurberiThurber's buckwheat1  
306PolEriogonum trichopeslittle desert trumpet1  
307PolEriogonum wrightii var. nodosumWright's buckwheat852
308PolPterostegia drymarioidesfairy bowties, threadstem  20
309RanClematis paucifloravirgin's bower1 1
310RanDelphinium parishii ssp. parishiiParish's larkspur9 10
311RanRanunculus cymbalariaRocky Mountain buttercup1  
312RhaZiziphus parryi var. parryilotebush9 1
313RosAdenostoma fasciculatumchamise 20 
314RosPrunus fasciculata var. fasciculatadesert almond1  
315RosPrunus fremontiidesert apricot94010
316RosRubus armeniacus*Himalaya blackberry  ~M
317RubGalium angustifolium ssp. angustifoliumnarrowleaf bedstraw1 3
318RubGalium angustifolium ssp. gracillimumslender bedstraw1  
319RubGalium aparinecommon bedstraw  20
320RubGalium stellatumstar-flowered bedstraw6  
321SalPopulus fremontii ssp. fremontiiFremont cottonwood3 2
322SalSalix exigua var. exiguanarrowleaf willow3 5
323SalSalix gooddingiiblack willow3 1
324SalSalix laevigatared willow2  
325SapAcer macrophyllumbigleaf maple1  
326SaxJepsonia parryicoast jepsonia1  
327SimSimmondsia chinensisjojoba6201
328SolDatura wrightiisacred datura 203
329SolLycium andersoniiAnderson's boxthorn6220
330SolLycium brevipes var. brevipesdesert boxthorn1  
331SolLycium torreyiTorrey's boxthorn2  
332SolNicotiana attenuatacoyote tobacco1  
333SolNicotiana obtusifoliadesert tobacco9 10
334SolPhysalis crassifoliathick-leaved ground cherry531
335SolSolanum douglasiiwhite nightshade4 1
336TamTamarix aphylla*athel1  
337TamTamarix ramosissima*saltcedar1  
338UrtParietaria hespera var. hesperapellitory6 50
339UrtParietaria pensylvanicaPennsylvania pellitory2  
340VisPhoradendron californicumdesert mistletoe8230
341VitVitis girdianawild grape4 99
342ZygFagonia laevisCalifornia fagonia4  
343ZygLarrea tridentatacreosote bush82050
344AgaAgave deserti var. desertidesert agave1  
345AgaHesperoyucca whippleichaparral yucca 20 
346AgaYucca schidigeraMohave yucca55 
347AllAllium marviniiYucaipa onion1  
348AraLemna minutaduckweed1  
349AreWashingtonia filiferaCalifornia fan palm1 65
350CypCarex almasturdy sedge2  
351CypCyperus involucratus*umbrella plant8 10
352CypCyperus squarrosusbearded flatsedge1  
353CypEleocharis geniculatabent spikerush6  
354CypEleocharis parishiiParish's spikerush9  
355CypSchoenoplectus americanusAmerican tule6  
356JunJuncus acutus ssp. leopoldiispiny rush4  
357JunJuncus bufoniustoad rush1  
358JunJuncus mexicanusMexican rush  X
359JunJuncus rugulosuswrinkled rush1  
360JunJuncus xiphioidesiris-leaved rush3 1
361LilCalochortus concolorgolden-bowl mariposa  T
362OrcEpipactis giganteastream orchid9  
363PoaAgrostis exarataspike bentgrass1  
364PoaAndropogon glomeratus var. scabriglumissouthwestern bushy bluestem4  
365PoaAristida adscensionissix-weeks three-awn59910
366PoaAristida purpureapurple three-awn 3010
367PoaAristida purpurea var. nealleyiNealley three-awn3  
368PoaAristida purpurea var. parishiiParish three-awn1  
369PoaAvena barbata*slender wild oats  20
370PoaBothriochloa barbinodiscane bluestem3  
371PoaBromus berteroanusChilean chess5  
372PoaBromus carinatus var. carinatusCalifornia brome1 40
373PoaBromus diandrus*ripgut brome1 99
374PoaBromus hordeaceus*soft chess1 15
375PoaBromus madritensis ssp. rubens*red brome59999
376PoaBromus tectorum*downy brome 9930
377PoaCenchrus longispinus*mat sandbur1  
378PoaCynodon dactylon*Bermuda grass2 10
379PoaDactyloctenium aegyptium*crows-foot grass3  
380PoaDasyochloa pulchellafluff grass2  
381PoaDistichlis spicatasaltgrass  10
382PoaFestuca bromoides*brome fescue1 30
383PoaFestuca myuros*rattail fescue3  
384PoaFestuca octoflorasix-weeks fescue4  
385PoaHilaria rigidabig galleta54050
386PoaHordeum murinum*foxtail barley  99
387PoaHordeum murinum ssp. glaucum*foxtail barley1  
388PoaImperata brevifoliasatintail1  
389PoaMelica frutescenstall melica2  
390PoaMuhlenbergia microspermalittleseed muhly3 10
391PoaMuhlenbergia rigensdeergrass  10
392PoaPennisetum setaceum*fountain grass 9999
393PoaPoa bigeloviiBigelow's blue grass6  
394PoaPoa secunda ssp. secundaone-sided bluegrass  10
395PoaPolypogon monspeliensis*rabbits-foot grass  10
396PoaPolypogon viridis*green bentgrass1  
397PoaSchismus barbatus*Mediterranean schismus1 99
398PoaStipa capensis*spear needlegrass 9999
399PoaStipa coronatagiant needlegrass1  
400PoaStipa lepidafoothill needlegrass  3
401PoaStipa speciosadesert needlegrass2  
402RusNolina parryiParry's nolina  3
403TheDichelostemma capitatum ssp. capitatumblue dicks9 30
404TypTypha latifoliabroadleaf cattail1  

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:

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 (

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Copyright © 2010-2017 by Tom Chester, Robert Hepburn, James Dillane, Kate Harper, Dave Stith, Keir Morse and Pam Pallette.
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Last update: 16 December 2017