Flora of Borrego Palm Canyon

Procedure For Compiling The Checklist
Important Caveats


Borrego Palm Canyon is the most famous and most visited area in Anza-Borrego Desert State Park. It was originally called just Palm Canyon, and was well named since it has the third largest collection of palms in California, after Palm Canyon and Murray Canyon in Palm Springs. Randall Henderson, editor and publisher of Desert Magazine, counted 778 palm trees in the winter of 1940. The Canyon was eventually renamed Borrego Palm Canyon to prevent confusion with Palm Canyon in Palm Springs.

The Canyon was the first piece of property in what was then called Borrego Palms Desert State Park, one of the first State Parks in 1933. The Park Headquarters was originally located at the mouth of the Canyon until around 1957. The 1.4 mile Nature Trail leading to the first palm grove was built in 1933 with hand tools by the first park rangers. The Alternate Trail was built in the late 1960s by the La Cima honor camp inmates, and was known as the La Cima trail briefly. (Source for the historical information: Anza-Borrego A to Z, Diana Lindsay, 2001.)

The Canyon is without question one of the most delightful and special places in Anza-Borrego Desert State Park for a number of reasons. Among them are:

The Canyon also is one of the most reliable places to see flowers in the Borrego Desert. It gets more water than places to its east, due to "spillover rain" from the mountain crest to the west during conditions of orographic rain, which is the most frequent type of rain southern California gets in the winter. Borrego Palm Canyon can sometimes get up to an inch of rain from such storms, whereas locations five miles east get nothing.

February and March flowers also survive better here than points east, for reasons I can only speculate about. Even after long periods without rainfall, the annuals on the alluvial slopes away from the stream can look happy here while annuals to the east are dying. This may be due to a combination of increased shade here, resulting in less evaporation from the soil, along with higher humidity levels at night that might give plants extra water from condensation.

The increased shade is due to earlier sunsets from the higher terrain to the west, plus extensive shade within the canyon itself from its southern walls coupled with the low sun angle in the wintertime. Even places not shaded by the southern walls might benefit from lower maximum daytime temperatures due to nearby shade.

This checklist is a pretty good start at a flora of Borrego Palm Canyon for two reasons. First, many botanists have visited the Canyon over a period of decades and collected specimens. Although I haven't yet retrieved the online vouchers for all areas of the Borrego Desert, I'd be very surprised if any other area of the Borrego Desert had more vouchers than here.

Second, I have spent 15 days from 2003 to 2007 surveying the 3.1 mile Nature Trail / Alternate Trail loop. Seven of those days were in the glorious 2005 prime season that produced a number of new records for the Borrego Desert. On most of those trips I was accompanied by the coauthors of our Plant Guide to that trail. My co-workers and I have also surveyed the Alternate Wash once so far.

Thus the list below is probably the most complete for any area of the Borrego Desert. However, many areas of Borrego Palm Canyon have not yet been explored, so more species will be added to the list in the future.

This checklist is only a start at the flora of this Canyon, since many of the entries come from vouchers I haven't yet reviewed, and I haven't yet vouchered all of the new records I have found so that my determinations can be reviewed. This checklist can only be considered a decent flora after I finish both of those tasks. This checklist will be revised as I work on both of those tasks.


Borrego Palm Canyon is directly west of Borrego Springs:

Only the portion of the Canyon below an elevation of 3000 feet is included in the Flora presented here. The boundaries of this Flora are shown in red in the map below (BPC = Borrego Palm Canyon):

The 3000 feet elevation contour is the jagged line on the left. The straight red lines are the lower-elevation boundaries for this area. The divide on the north is with Henderson Canyon, and the divide on the south is with Hellhole Canyon. The eastern boundary is taken as Borrego Springs Road for now, although I may move that boundary west to the State Park Boundary in the future.

Nearly all of this area in the Canyon is very rugged and has not been explored botanically. The main area of previous study is along the stream and the trails, shown in detail in the next map:

The 1.4 mile long Nature Trail is shown in blue, with two parallel sections in its north-south middle section. The western section is the pre-2003 route; the eastern section is the post-2003 flood route; see details on the changes.

The 1.2 mile Alternate Trail is shown in green. My Plant Guide is to the loop going up the Nature Trail to the first Palm Grove, then retracing the Nature Trail to the junction with the Alternate Trail, and taking the Alternate Trail down.

The red lines near the parking shown the route surveyed on 6 February 2008 for a flora of the Alternate Wash.

Procedure For Compiling The Checklist

The Checklist was compiled from online vouchers and from field work done by myself and coworkers.

The vouchers were obtained from combining several searches of the Consortium of California Herbaria with a search of the San Diego County Plant Atlas, on 7 February 2008.

The first search of the Consortium vouchers retrieved all vouchers bounded by latitudes 33.265 to 33.301° and longitudes of -116.478 and -116.375°. The search retrieved 245 vouchers.

A second search was for all vouchers with the words Borrego and Palm in their locality. (I realized later I should have also searched for Borego, the older spelling for Borrego; I'll do that in the future). That search retrieved 707 vouchers, many of which were in other areas or duplicated taxa found in the first search and were removed. Vouchers that said only Upper Palm Canyon were accepted for now, even though they may have been taken at elevations above 3000 feet. I will work in the future to make sure the final Checklist includes only taxa definitely found below 3000 feet.

The combination of the two searches yielded 384 vouchers of 196 taxa.

Unfortunately, there is no way to search the San Diego County Plant Atlas / San Diego Natural History Museum Herbaria on latitude and longitude, so I couldn't perform the same search for records in the Plant Atlas that have not yet appeared in the Consortium database. But, fortunately, grid cell F23 covers most of my targeted area with only a little extra coverage to the south in the Hellhole Canyon drainage. Grid cell F23 spans latitudes 33.254 to 33.298° and longitudes of -116.458 to -116.430°.

There were 17 additional species found in the Plant Atlas / SD Herbarium vouchers, and I have included them for now in the Flora below. When I get the actual detailed records from the Plant Atlas / SD Herbarium, I will review them and remove those not in the targeted area.

There are thus 213 total taxa vouchered from this Canyon in the Checklist below.

By coincidence, Wayne Armstrong, James Dillane and Michael Charters and I have found the same number of total taxa so far on the loop trail, 213, but our list is substantially different from the list of vouchered taxa. Note that not all of our observed taxa are 100% identified yet, since some were never observed in bloom. Those taxa with only 95% confident determinations are noted in the Checklist.

Of our 213 observed taxa, 119 taxa appear in the list of taxa vouchered from this area, leaving 94 taxa as so-far-unvouchered new records for this Canyon, at least in terms of online vouchers. Of those 94, 29 taxa are recorded in the 1985 Checklist of Vascular Plants of the Anza-Borrego Desert by Duffie Clemons as having been vouchered here or someplace else in Floristic Area #16. Thus at least 65 of those taxa remain to be vouchered.

The number of new records from our trail work is not known yet, since several local herbaria have not finished digitized their vouchers yet. Also, I have already vouchered some of the new taxa found by us, which are counted in the 119 total.

The survey of the Alternate Wash by Wayne Armstrong, Kate Shapiro, Bill Sullivan and myself yielded 57 taxa identified with high enough confidence to list in the following checklist, along with ten other taxa that could not yet be identified due to lack of flowers. Of the 57 taxa, three taxa were species not found on the loop trail, all of which had been vouchered here.

There are thus 216 total taxa that have been located precisely in the field.

The combination of the vouchers and field surveys was then processed to remove probable duplication, and to make the taxa consistent with the 1985 Checklist, by assigning subspecies and varieties to vouchers only determined to the species. The subspecies and varieties were always the nominative ones, which is probably what was meant anyway for the voucher determination, with the exception that the voucher of Artemisia ludoviciana was assigned to ssp. incompta.

The above procedure yielded the 305 taxa given in the checklist below.

Note added 21 January 2016: the flora has been updated from four subsequent surveys of Borrego Palm Canyon, but the above text has not yet been revised with that information.

Note added 5 December 2019. The flora has been updated from iNat observations. While doing so, I noticed a number of species, with Borrego Palm Canyon locations in iNat, that almost surely were not found in Borrego Palm Canyon. Further investigation showed that those species came from two observers that had erroneous locations for their observations. In one case, an observer had attempted to assign locations to his photos from memory, and was badly off in some cases. In the other case, the observer simply used a location in Borrego Palm Canyon "as the central location of the many we visited over a 4 day period", but without assigning an appropriate error radius for his location.

Excluding those species, iNat observations added 11 species to the flora.

Important Caveats

Please note the following important caveats about this preliminary Checklist:

Checklist for Borrego Palm Canyon


An asterisk before the common name indicates a non-native species.

The column #V gives the number of vouchers found in this area, as detailed above.

The column #iN gives the number of iNaturalist observations found in this area, up to a maximum of 99.

The column #Pls gives the minimum number of plants observed in the sum of all field surveys, up to a maximum number of 99. An "x" in this column indicates a species for which no abundance estimate has been made. These are often "wash-down" species, that are present only when brought down from higher elevation by a flash flood; monsoonal species, present only in years with good summer rains; or found in the upper canyon that we rarely visit. When we next see them, we'll estimate their abundances.

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#FamScientific Name(*)Common Name#V#iN#Pls
1SelSelaginella eremophiladesert spike-moss3199
2EquEquisetum XferrissiiFerriss' horsetail 650
3PteAdiantum capillus-venerismaidenhair fern4 53
4PteCheilanthes covilleibeady lipfern2 10
5PteCheilanthes parryiwoolly lipfern91199
6PteCheilanthes viscidasticky lipfern4250
7PteNotholaena californica ssp. californicaCalifornia cloak fern3210
8PtePellaea mucronata var. mucronatabird's-foot fern11
9PtePentagramma triangularis ssp. triangularisgoldback fern2 
10CupJuniperus californicaCalifornia juniper3155
11EphEphedra asperaMormon tea6475
12EphEphedra californicadesert tea21x
13SauAnemopsis californicayerba mansa 1
14AcaCarlowrightia arizonicaArizona carlowrightia2 5
15AcaJusticia californicachuparosa79999
16AmaAmaranthus albus*tumble pigweed  1
17AmaAmaranthus fimbriatusfringed amaranth  x
18AnaRhus ovatasugar bush22x
19ApiApiastrum angustifoliumwild celery2 
20ApiApium graveolens*celery  2
21ApiDaucus pusillusrattlesnake weed  10
22ApiOenanthe sarmentosawater-parsley1 
23ApoFunastrum cynanchoides var. hartwegiiclimbing milkweed9421
24ApoFunastrum hirtellumrambling milkweed 1
25AstAdenophyllum porophylloidesSan Felipe dogweed3 46
26AstAmbrosia dumosaburroweed43599
27AstAmbrosia psilostachyawestern ragweed  99
28AstAmbrosia salsola var. salsolacheesebush76399
29AstArtemisia ludoviciana ssp. albulawhite mugwort1 
30AstArtemisia ludoviciana ssp. ludovicianasilver wormwood  2
31AstBaccharis brachyphyllashort-leaved baccharis  1
32AstBaccharis salicifolia ssp. salicifoliamule fat2116
33AstBaccharis sergiloidesdesert baccharis1 3
34AstBahiopsis parishiiParish's goldeneye4799
35AstBaileya pauciradiataColorado Desert marigold12
36AstBebbia juncea var. asperasweetbush52499
37AstBrickellia desertorumdesert brickellia 110
38AstBrickellia frutescensshrubby brickellia1 
39AstChaenactis artemisiifoliameally white pincushion1 20
40AstChaenactis carphoclinia var. carphocliniapebble pincushion  60
41AstChaenactis fremontiiFremont pincushion62299
42AstChaenactis stevioidesdesert pincushion12
43AstDicoria canescensdesert dicoria 2x
44AstDimorphotheca sinuata*African daisy  1
45AstEncelia farinosabrittlebush77499
46AstEricameria brachylepisboundary goldenbush127
47AstErigeron canadensishorseweed1 12
48AstEriophyllum confertiflorum var. confertiflorumgolden yarrow1 
49AstEriophyllum wallaceiWallace's woolly daisy 11
50AstGnaphalium palustrewestern marsh cudweed  1
51AstGutierrezia sarothraematchweed  40
52AstIsocoma acradenia var. eremophilasolitary-leaved alkali goldenbush1 10
53AstLactuca serriola*prickly lettuce  x
54AstLogfia depressadwarf filago 320
55AstLogfia filaginoidesCalifornia filago1399
56AstMalacothrix glabratadesert dandelion44350
57AstMalacothrix stebbinsiiStebbins' malacothrix1 
58AstMonoptilon bellioidesdesert star47
59AstOncosiphon piluliferum*clustered chamomile1 
60AstPalafoxia arida var. aridaSpanish needle26
61AstPectis papposa var. papposachinch-weed  20
62AstPerityle emoryiEmory's rock-daisy84399
63AstPleurocoronis plurisetaarrow-leaf6350
64AstPluchea sericeaarrow-weed21599
65AstPseudognaphalium biolettiibicolored everlasting1 
66AstPseudognaphalium luteoalbum*common cudweed1 18
67AstPseudognaphalium stramineumcotton-batting plant  x
68AstRafinesquia neomexicanadesert chicory53157
69AstSenecio mohavensisMojave ragwort 1299
70AstSolidago velutina ssp. californicagoldenrod2 30
71AstSonchus asper ssp. asper*prickly sow thistle  1
72AstSonchus oleraceus*sow thistle 19
73AstStephanomeria exigua ssp. exiguaslender wreathplant2 
74AstStephanomeria pauciflorawire-lettuce1454
75AstStylocline micropoidesdesert nest straw  x?
76AstTrichoptilium incisumyellow-head11
77AstTrixis californica var. californicaCalifornia trixis81695
78AstUropappus lindleyisilver puffs 35
79BetAlnus rhombifoliawhite alder3 
80BigChilopsis linearis ssp. arcuatadesert-willow85142
81BorAmsinckia intermediacommon fiddleneck9499
82BorAmsinckia tessellata var. tessellatabristly fiddleneck25
83BorCryptantha angustifolianarrow-leaved cryptantha213
84BorCryptantha barbigera var. barbigerabearded cryptantha3299
85BorCryptantha intermedia var. intermediapopcorn flower  99
86BorCryptantha maritimaGuadalupe cryptantha  5
87BorCryptantha micrantha var. micranthared-root cryptantha1 10
88BorCryptantha muricataprickly cryptantha1 10
89BorCryptantha racemosabushy cryptantha  1
90BorEmmenanthe penduliflora var. penduliflorawhispering bells62999
91BorEriodictyon trichocalyx var. lanatumsmoothleaf yerba santa4326
92BorEucrypta chrysanthemifolia var. bipinnatifidaeucrypta1120
93BorNama demissa var. demissapurple mat419x
94BorPectocarya peninsularisBaja pectocarya 1
95BorPectocarya recurvatacurvenut combseed2399
96BorPhacelia affinislimestone phacelia  x
97BorPhacelia brachylobashort-lobed phacelia 1x
98BorPhacelia campanularia ssp. campanulariadesert bluebells 230
99BorPhacelia cicutaria var. hispidacaterpillar phacelia41150
100BorPhacelia crenulata var. ambiguaheliotrope phacelia1 1
101BorPhacelia crenulata var. minutifloralittle-flowered heliotrope phacelia11
102BorPhacelia cryptanthalimestone phacelia1 
103BorPhacelia distanscommon phacelia95199
104BorPhacelia minorwild canterbury bells23499
105BorPhacelia pedicellatapedicellate phacelia53
106BorPhacelia ramosissimabranching phacelia1 2
107BorPholistoma membranaceumwhite fiesta flower51399
108BorPlagiobothrys arizonicusArizona popcorn flower  1
109BraBoechera perennansperennial rock-cress1 
110BraBrassica tournefortii*Sahara mustard21399
111BraCapsella bursa-pastoris*shepherd's purse1 
112BraCaulanthus halliiHall's caulanthus1 3
113BraCaulanthus heterophyllus var. heterophyllusSan Diego jewelflower  x
114BraCaulanthus lasiophyllusCalifornia mustard1130
115BraCaulanthus simulansPayson's wild cabbage  1
116BraDescurainia pinnatawestern tansy-mustard7299
117BraDithyrea californicaspectacle-pod11
118BraDraba cuneifoliawedge-leaved draba41
119BraLepidium lasiocarpum ssp. lasiocarpumhairy-podded pepper-grass3499
120BraLyrocarpa coulteriCoulter's lyrepod  3
121BraNasturtium officinalewater cress1199
122BraSisymbrium altissimum*tumble-mustard1 
123BraSisymbrium irio*London rocket21099
124BraSisymbrium orientale*Oriental mustard1199
125BraStreptanthella longirostrislongbeak streptanthella2 
126BraThysanocarpus curvipesfringe-pod1230
127BraThysanocarpus laciniatuslace-pod1 
128CacCylindropuntia bigeloviiteddy-bear cholla 330
129CacCylindropuntia echinocarpasilver cholla 5
130CacCylindropuntia ganderiGander's cholla16599
131CacEchinocereus engelmanniiEngelmann's hedgehog cactus 125
132CacFerocactus cylindraceusCalifornia barrel cactus23099
133CacMammillaria dioicaCalifornia fish-hook cactus1435
134CacOpuntia basilaris var. basilarisbeavertail cactus 6699
135CacOpuntia phaeacanthadesert prickly-pear 2
136CamNemacladus glanduliferusglandular nemacladus4 x
137CamNemacladus rubescensdesert nemacladus2 
138CarAchyronychia cooperifrost mat2 2
139CarCerastium glomeratum*mouse-ear chickweed  x
140CarLoeflingia squarrosaspreading loeflingia2 x
141CarSilene antirrhinasnapdragon campion1 20
142CheAtriplex polycarpacattle saltbush  25
143CheChenopodium album*white goosefoot  1
144CheChenopodium murale*nettle-leaved goosefoot1350
145CheSalsola paulsenii*Paulsen's Russian thistle  5
146ConCuscuta californica var. californicaCalifornia dodder1 
147CraCrassula connatapygmy-weed 699
148CraDudleya arizonicaArizona chalk dudleya 2
149CraDudleya saxosa ssp. aloidesdesert dudleya1235
150CroCrossosoma bigeloviirock crossosoma4175
151CucCucurbita palmatacoyote melon121
152DatDatisca glomerataDurango root1 2
153EupBernardia incanawestern bernardia2 
154EupChamaesyce arizonicaArizona spurge2 30
155EupChamaesyce melanadeniared-gland spurge1 
156EupChamaesyce micromeraSonoran spurge  3
157EupChamaesyce polycarpasmall-seeded spurge4156
158EupChamaesyce setilobastarfish (Yuma) spurge  20
159EupCroton californicusCalifornia croton 1150
160EupDitaxis lanceolatanarrowleaf ditaxis92199
161EupEuphorbia erianthabeetle spurge3 20
162FabAcmispon argophyllus var. argophyllussouthern California silver-lotus  5
163FabAcmispon glaber var. brevialatusshort-winged deerweed1145
164FabAcmispon haydoniipygmy lotus3 
165FabAcmispon heermannii var. heermanniisilky lotus1 
166FabAcmispon maritimus var. brevivexillusshort-bannered coastal lotus 410
167FabAcmispon micranthusSan Diego birdsfoot lotus2 99
168FabAcmispon rigidusdesert lotus133
169FabAcmispon strigosusstrigose lotus2150
170FabAmorpha fruticosawestern false-indigo4 
171FabAstragalus nuttallianus var. cedrosensisCedros milk-vetch  10
172FabAstragalus palmeriPalmer's milk-vetch2 1
173FabDalea mollissimadowny dalea1 
174FabLupinus arizonicusArizona lupine116x
175FabLupinus concinnusbajada lupine5315
176FabLupinus sparsiflorusCoulter's lupine1 99
177FabMedicago lupulina*black medick1 
178FabMedicago polymorpha*California burclover  10
179FabMelilotus albus*white sweetclover1 x
180FabMelilotus indicus*sourclover2330
181FabOlneya tesotaironwood 205
182FabProsopis glandulosa var. torreyanahoney mesquite32999
183FabPsorothamnus schottiiindigo bush92820
184FabPsorothamnus spinosussmoke tree 53
185FabSenegalia greggiicatclaw22399
186FabTrifolium variegatumvariegated clover 1
187FabTrifolium willdenoviitomcat clover  x
188FouFouquieria splendens ssp. splendensocotillo18499
189GenZeltnera exaltatadesert centaury 4
190GerErodium cicutarium*redstem filaree 899
191GerErodium texanumTexas filaree  50
192KraKrameria bicolorwhite rhatany5625
193KraKrameria erectaPima rhatany41999
194LamHyptis emoryidesert-lavender99999
195LamSalvia apianawhite sage211
196LamSalvia columbariaechia22099
197LamSalvia eremostachyadesert sage2 1
198LamSalvia vaseyiVasey's sage9311
199LamStachys ajugoides var. rigidarigid hedge-nettle1 x
200LoaMentzelia desertorumdesert blazing star1 
201LoaMentzelia involucratabracted blazing star1 
202LoaPetalonyx thurberi ssp. thurberiThurber's sandpaper-plant 23
203LytLythrum californicumCalifornia loosestrife  22
204MalAyenia compactaayenia8 8
205MalEremalche exiliswhite mallow 499
206MalHibiscus denudatusrock hibiscus93499
207MalHorsfordia newberryiNewberry's velvet mallow7 75
208MalMalacothamnus aboriginumIndian Valley bush mallow1 
209MalSphaeralcea ambiguaapricot mallow341
210MalSphaeralcea ambigua var. ambiguaapricot mallow4399
211MalSphaeralcea ambigua var. rosacearosy apricot mallow3 
212MolMollugo cerviana*carpet-weed1 
213MonCalandrinia ciliatared maids  1
214MonCalyptridium monandrumsand cress5399
215MonClaytonia parviflora ssp. parvifloranarrow-leaved miner's lettuce  5
216MonClaytonia parviflora ssp. viridisgreen miner's lettuce  10
217MonClaytonia perfoliata ssp. perfoliataminer's lettuce  1
218NycAbronia villosa var. villosahairy sand-verbena 15
219NycAllionia incarnatatrailing four o'clock 1050
220NycBoerhavia coccineascarlet spiderling622
221NycBoerhavia triquetra var. intermediafivewing spiderling1 99
222NycMirabilis laevis var. retrorsaBigelow's desert four-o'clock12473
223NycMirabilis tenuilobaslender-lobed four o'clock4 61
224OnaCamissonia strigulosastrigose suncup  x
225OnaCamissoniopsis pallida ssp. pallidapale suncup61750
226OnaChylismia claviformis ssp. peirsoniibrown-eyed primrose43099
227OnaEpilobium canum ssp. latifoliummountain California-fuchsia2 99
228OnaEpilobium ciliatum ssp. ciliatumwillowherb  20
229OnaEremothera boothii ssp. condensataBooth's evening primrose3 
230OnaEulobus californicusCalifornia suncup31399
231OnaOenothera elata ssp. hirsutissimaHooker's evening-primrose  81
232OroCastilleja minor ssp. spiralislesser paintbrush17
233PapArgemone munitaprickly poppy213
234PapEschscholzia minutiflora ssp. minutiflorasmall-flowered poppy42040
235PapEschscholzia parishiiParish's poppy44240
236PhrMimulus aurantiacus var. pubescenslong-flowered bush monkeyflower1 
237PhrMimulus bigelovii var. bigeloviiBigelow's monkeyflower66799
238PhrMimulus cardinalisscarlet monkeyflower 1x
239PhrMimulus floribundusfloriferous monkeyflower  1
240PhrMimulus guttatuscommon monkeyflower186
241PlaAntirrhinum coulterianumCoulter's snapdragon  5
242PlaAntirrhinum filipesdesert twining snapdragon1 1
243PlaCollinsia concolorsouthern Chinese houses  x
244PlaKeckiella antirrhinoides var. microphyllalittle-leaved chaparral beardtongue3 
245PlaLinaria bipartita*split-lip toadflax1 
246PlaMohavea confertifloraghost flower325
247PlaPenstemon clevelandii var. clevelandiiCleveland's beardtongue125
248PlaPlantago ovatadesert plantain 299
249PlaVeronica anagallis-aquatica*water speedwell135
250PlaPlatanus racemosawestern sycamore445
251PolEriastrum diffusumminiature woolly-star1 
252PolEriastrum eremicum ssp. eremicumdesert woolly-star33
253PolGilia capitata ssp. abrotanifoliaglobe gilia1 1
254PolGilia ochroleuca ssp. exilisvolcanic gilia  5
255PolGilia stellatastar gilia7330
256PolLangloisia setosissima ssp. setosissimabristly langloisia11
257PolLeptosiphon floribundus ssp. glabersummer snow1 
258PolLoeseliastrum matthewsiidesert calico33
259PolLoeseliastrum schottiiSchott's calico44
260PolSaltugilia australissouthern gilia  10
261PolSaltugilia latimeriLatimer's woodland-gilia 1
262PolChorizanthe brevicornu var. brevicornubrittle spineflower2610
263PolChorizanthe fimbriata var. laciniatalace-fringed spineflower  1
264PolChorizanthe rigidadevil's spineflower  x
265PolEriogonum fasciculatum var. polifoliumCalifornia buckwheat1117
266PolEriogonum inflatumdesert trumpet3740
267PolEriogonum reniformekidney-leaf buckwheat1 
268PolEriogonum thomasiiThomas' buckwheat32
269PolEriogonum wrightii var. nodosumWright's buckwheat  85
270PolPterostegia drymarioidesfairy bowties, threadstem1399
271PolRumex conglomeratus*whorled dock  6
272RanDelphinium parishii ssp. subglobosumintermediate larkspur6225
273RhaZiziphus parryi var. parryilotebush  35
274RosDrymocallis glandulosasticky cinquefoil  x?
275RosPrunus fremontiidesert apricot1 30
276RubGalium angustifolium ssp. borregoenseBorrego bedstraw4 
277RubGalium aparinecommon bedstraw  x
278RubGalium stellatumstar-flowered bedstraw7265
279SalPopulus fremontii ssp. fremontiiFremont cottonwood 911
280SalSalix exigua var. exiguanarrowleaf willow 1162
281SalSalix laevigatared willow 42
282SimSimmondsia chinensisjojoba1475
283SolDatura discolordesert thornapple2 40
284SolDatura wrightiisacred datura2770
285SolLycium andersoniiAnderson's boxthorn 399
286SolNicotiana obtusifoliadesert tobacco6744
287SolPhysalis crassifoliathick-leaved ground cherry2610
288SolSolanum douglasiiwhite nightshade3 1
289TamTamarix ramosissima*saltcedar 35
290UrtParietaria hespera var. hesperapellitory4 99
291UrtUrtica dioica ssp. holosericeastinging nettle  10
292VisPhoradendron californicumdesert mistletoe4762
293VitVitis girdianawild grape1 
294ZygFagonia laevisCalifornia fagonia11421
295ZygKallstroemia californicaCalifornia caltrop1 
296ZygLarrea tridentatacreosote bush18599
297ZygTribulus terrestris*puncture-vine1 
298AgaAgave deserti var. desertidesert agave 999
299AgaHesperoyucca whippleichaparral yucca  5
300AllAllium haematochitonred-skinned onion3 
301AraLemna minutaduckweed  99
302AreWashingtonia filiferaCalifornia fan palm77599
303CypEleocharis parishiiParish's spikerush1150
304CypSchoenoplectus acutus var. occidentaliscommon tule1 5
305CypSchoenoplectus americanusAmerican tule 299
306JunJuncus mexicanusMexican rush  99
307JunJuncus rugulosuswrinkled rush  20
308JunJuncus xiphioidesiris-leaved rush1 41
309OrcEpipactis giganteastream orchid1 
310PoaAristida adscensionissix-weeks three-awn2 30
311PoaAristida purpurea var. nealleyiNealley three-awn1 
312PoaAristida ternipes var. gentilishook three-awn1 
313PoaAvena barbata*slender wild oats1 6
314PoaBothriochloa barbinodiscane bluestem1 2
315PoaBouteloua aristidoides var. aristidoidesneedle grama  30
316PoaBouteloua barbata var. barbatasix-weeks grama1 
317PoaBromus carinatus var. carinatusCalifornia brome  10
318PoaBromus diandrus*ripgut brome  30
319PoaBromus madritensis ssp. rubens*red brome2399
320PoaBromus tectorum*downy brome  20
321PoaCynodon dactylon*Bermuda grass  5
322PoaDistichlis spicatasaltgrass  11
323PoaFestuca bromoides*brome fescue  x
324PoaFestuca myuros*rattail fescue1 5
325PoaFestuca octoflorahairy six-weeks fescue  10
326PoaHilaria rigidabig galleta31599
327PoaHordeum murinum*foxtail barley 1x
328PoaImperata brevifoliasatintail 1
329PoaMelica frutescenstall melica  16
330PoaMuhlenbergia microspermalittleseed muhly1 
331PoaMuhlenbergia rigensdeergrass1 3
332PoaPennisetum setaceum*fountain grass23999
333PoaPhragmites australiscommon reed 310
334PoaPoa bigeloviiBigelow's blue grass  1
335PoaPolypogon interruptus*ditch beard grass11
336PoaPolypogon monspeliensis*rabbits-foot grass2 28
337PoaPolypogon viridis*green bentgrass  10
338PoaSchismus barbatus*Mediterranean schismus1399
339TheDichelostemma capitatum ssp. capitatumblue dicks1 
340TheMuilla maritimamuilla 110
341TypTypha domingensissouthern cattail  70

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Copyright © 2008-2019 by Tom Chester
Permission is freely granted to reproduce any or all of this page as long as credit is given to me at this source:
Comments and feedback: Tom Chester
Last update: 5 December 2019 (Equisetum species updated 23 March 2023)