Flora of Cool Canyon, Anza-Borrego Desert State Park


Fig. 1. A panoramic view of the upper part (top) and lower part (bottom) of Cool Canyon, taken on 6 October 2010 by Tom Chester from the ridge immediately south of the lower part of Cool Canyon. Click on the pictures for larger versions.


This is a flora of Cool Canyon, a subset of the Flora of southeast Granite Mountain. See that page for some background information about this area and this checklist; Fig. 2 in that page shows Cool Canyon in the context of its surrounding area.

For additional information about hiking in Cool Canyon, with lots of pictures of the scenery and plants here, see Fred Melgert and Carla Hoegen's pages:

See also 12 year repeat photography in Cool Canyon.

We define the Cool Canyon area here to include the entire area drained by Cool Canyon, extending to the ridgelines separating its drainage area from the major canyons to its north, west and east, with the eastern boundary at Highway S2; see map showing boundaries and places where species were observed.

This page has been updated from the version at the link above with a new voucher search on 9 February 2018; the addition of species seen by Carla Hoegen and Fred Melgert on their Cool Canyon loops; species added from other visits to Cool Canyon; and records from iNaturalist. We searched records from Calflora as well, but there were no observations in this area.

This checklist now contains only species known to occur in the Cool Canyon area, and does not include species from Hornblende Canyon.

Field trips which contributed observations to this flora are:

Vouchers. There were 177 vouchers from Cool Canyon, 145 from Larry Hendrickson, 30 from Michael G. Simpson and colleagues, and 1 each from Juergen Schrenk and Bill Sullivan. One voucher determination of Argemone hispida was rejected. That species lives on the eastern edge of the Rocky Mountains, and it is likely that voucher is actually of A. munita.

The vouchers in Cool Canyon are primarily from 2400 to 2800 feet elevation (108 out of 125 with elevations), with the rest from 3000 to 4000 feet.

iNaturalist. There were 303 iNaturalist observations in Cool Canyon, 136 from Terry Hunefeld, 48 by James Bailey, 39 by Fred Melgert and Carla Hoegen, and 80 observations by six others. Eight determinations were rejected as being either incorrect (and annotated by Tom), or not showing enough information in the pictures to definitively support the determination (and commented on by Tom).

Fig. 2 shows all the locations where species were recorded or vouchered by all of the above.

Fig. 2. All locations where species have been recorded for the flora of Cool Canyon. Click on the picture for a larger version.

A breakdown of the sources of the species GPS points are:

Some notable species missing from the Cool Canyon Flora, that are found in the neighboring Horneblende Canyon, are Allionia incarnata, Ambrosia dumosa, Brassica tournefortii, Cylindropuntia bigelovii, Ditaxis neomexicana, Eschscholzia minutiflora, Euphorbia eriantha, Fagonia laevis, Galium stellatum, Pectocarya linearis ssp. ferocula, and Trixis californica var. californica.

Checklist for Cool Canyon


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

The column labeled #Pls gives a minimum estimate of the number of plants in Cool Canyon from our surveys. Non-numeric entries are for species for which no abundance estimate was made. A FC in this column indicates a species observed by Fred Melgert and Carla Hoegen. A V in this column indicates a species that was vouchered, but not observed by us.

Version for printing, without other text on this page: html (6 pages) or pdf Clickbook booklet (2 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-moss99
2SelSelaginella eremophiladesert spike-moss99
3PteCheilanthes covilleibeady lipfern99
4PteCheilanthes viscidasticky lipfern3
5PteNotholaena californica ssp. californicaCalifornia cloak fern7
6PtePellaea mucronata var. mucronatabird's-foot fern10
7CupJuniperus californicaCalifornia juniper60
8EphEphedra asperaMormon tea99
9AcaCarlowrightia arizonicaArizona carlowrightia37
10AmaAmaranthus fimbriatusfringed amaranth99
11AnaRhus ovatasugar bush8
12ApoFunastrum cynanchoides var. hartwegiiclimbing milkweedV
13ApoFunastrum utahenseUtah vine milkweed5
14AstAcamptopappus sphaerocephalus var. sphaerocephalusgoldenhead5
15AstAdenophyllum porophylloidesSan Felipe dogweed60
16AstAmbrosia salsola var. salsolacheesebush10
17AstArtemisia ludoviciana ssp. incomptamountain mugwort50
18AstArtemisia ludoviciana ssp. ludovicianasilver wormwoodV
19AstBaccharis brachyphyllashort-leaved baccharis10
20AstBahiopsis parishiiParish's goldeneye99
21AstBebbia juncea var. asperasweetbush40
22AstBrickellia atractyloides var. argutaCalifornia spear-leaved brickellia23
23AstBrickellia frutescensshrubby brickellia40
24AstChaenactis fremontiiFremont pincushion1
25AstDimorphotheca sinuata*African daisyV
26AstEncelia actoniActon enceliaV
27AstEncelia farinosabrittlebush99
28AstEncelia farinosa var. phenicodontapurple disk flower brittlebushV
29AstEricameria brachylepisboundary goldenbush50
30AstEricameria linearifolianarrowleaf goldenbushV
31AstEriophyllum confertiflorum var. confertiflorumgolden yarrow20
32AstEriophyllum wallacei var. rubellumWallace's woolly daisy3
33AstGutierrezia sarothraematchweed30
34AstLasthenia gracilisgoldfields10
35AstLayia glandulosawhite tidy-tipsV
36AstLogfia filaginoidesCalifornia filago5
37AstMalacothrix glabratadesert dandelionV
38AstPectis papposa var. papposachinch-weed20
39AstPerityle emoryiEmory's rock-daisy12
40AstPorophyllum gracileodora30
41AstPseudognaphalium biolettiibicolored everlastingFC
42AstPseudognaphalium californicumCalifornia everlastingFC
43AstStephanomeria exigua ssp. exiguaslender wreathplantV
44AstStephanomeria pauciflorawire-lettuce15
45AstStylocline gnaphaloideseverlasting nest-straw5
46AstUropappus lindleyisilver puffsV
47BorAmsinckia intermediacommon fiddleneck99
48BorCryptantha barbigera var. barbigerabearded cryptantha40
49BorCryptantha decipiensgravel cryptanthaV
50BorCryptantha intermedia var. intermediapopcorn flower2
51BorCryptantha micrantha var. micranthared-root cryptantha1
52BorCryptantha pterocarya var. pterocaryawing-nut cryptantha25
53BorEmmenanthe penduliflora var. penduliflorawhispering bells30
54BorEucrypta chrysanthemifolia var. bipinnatifidaeucrypta8
55BorPectocarya peninsularisBaja pectocaryaV
56BorPectocarya recurvatacurvenut combseed5
57BorPhacelia affinislimestone phaceliaFC
58BorPhacelia campanularia ssp. campanulariadesert bluebellsFC
59BorPhacelia cicutaria var. hispidacaterpillar phaceliaFC
60BorPhacelia distanscommon phacelia50
61BorPhacelia minorwild canterbury bells10
62BorPhacelia pedicellatapedicellate phacelia5
63BorPlagiobothrys arizonicusArizona popcorn flower2
64BraBoechera perennansperennial rock-cress11
65BraBoechera xylopodaslender & beautiful rock-cressV
66BraCaulanthus halliiHall's caulanthus4
67BraCaulanthus lasiophyllusCalifornia mustard1
68BraCaulanthus simulansPayson's wild cabbageV
69BraDescurainia pinnatawestern tansy-mustard3
70BraDraba cuneifoliawedge-leaved drabaV
71BraLepidium lasiocarpum ssp. lasiocarpumhairy-podded pepper-grass15
72BraSisymbrium altissimum*tumble-mustard1
73BraSisymbrium irio*London rocketV
74BraSisymbrium orientale*Oriental mustard1
75BraThysanocarpus curvipes ssp. eradiatusfringe-pod1
76BraTropidocarpum gracileslender tropidocarpumV
77CacCylindropuntia ganderiGander's cholla99
78CacEchinocereus engelmanniiEngelmann's hedgehog cactus99
79CacFerocactus cylindraceusCalifornia barrel cactus75
80CacMammillaria dioicaCalifornia fish-hook cactus3
81CacMammillaria tetrancistradesert fish-hook cactus14
82CacOpuntia basilaris var. basilarisbeavertail cactus99
83CacOpuntia chloroticapancake prickly-pearFC
84CacOpuntia engelmannii var. engelmanniiEngelmann prickly-pear1
85CacOpuntia phaeacanthadesert prickly-pear11
86CarLoeflingia squarrosaspreading loeflingiaV
87CheAtriplex canescens var. laciniataCaleb four-wing saltbushV
88CheAtriplex canescens var. macilentaSalton saltbushV
89CraCrassula connatapygmy-weedV
90CraDudleya arizonicaArizona chalk dudleya33
91EriArctostaphylos glaucabigberry manzanita2
92EupBernardia incanawestern bernardia45
93EupChamaesyce melanadeniared-gland spurge20
94EupChamaesyce micromeraSonoran spurgeV
95EupCroton californicusCalifornia crotonV
96EupDitaxis lanceolatanarrowleaf ditaxis55
97EupStillingia linearifolialinear-leaved stillingia3
98FabAcmispon argophyllus var. argophyllussouthern California silver-lotus5
99FabAcmispon glaber var. brevialatusshort-winged deerweed50
100FabAcmispon rigidusdesert lotusV
101FabAcmispon strigosusstrigose lotus60
102FabAstragalus palmeriPalmer's milk-vetch20
103FabLupinus concinnusbajada lupine20
104FabLupinus sparsiflorusCoulter's lupine1
105FabProsopis glandulosa var. torreyanahoney mesquite1
106FabSenegalia greggiicatclaw99
107FabSenna covesiidesert sennaV
108FagQuercus cornelius-mulleridesert scrub oak5
109FouFouquieria splendens ssp. splendensocotillo80
110GerErodium cicutarium*redstem filaree99
111KraKrameria bicolorwhite rhatany15
112KraKrameria erectaPima rhatany10
113LamSalvia apianawhite sage10
114LamSalvia carduaceathistle sage5
115LamSalvia columbariaechia40
116LoaMentzelia montanamountain blazing starV
117MalAyenia compactaayenia45
118MalSphaeralcea ambigua var. ambiguaapricot mallow20
119MolMollugo cerviana*carpet-weedV
120MonCalyptridium monandrumsand cress1
121NycBoerhavia coulteri var. palmeriCoulter's spiderling1
122NycBoerhavia triquetra var. intermediafivewing spiderling99
123NycMirabilis laevis var. retrorsaBigelow's desert four-o'clock99
124NycMirabilis laevis var. villosaBigelow's desert four-o'clockV
125OleMenodora scabra var. glabrescensbroom twinberryFC
126OnaCamissoniopsis hirtellafield suncupV
127OnaCamissoniopsis pallida ssp. pallidapale suncup99
128OnaEulobus californicusCalifornia suncup99
129OroCastilleja foliolosawoolly Indian paintbrush5
130PapArgemone munitaprickly poppy11
131PlaKeckiella antirrhinoides var. microphyllalittle-leaved chaparral beardtongue50
132PlaPlantago patagonicaPatagonia plantain1
133PolEriastrum eremicum ssp. eremicumdesert woolly-star3
134PolLeptosiphon lemmoniiLemmon's linanthus5
135PolLoeseliastrum schottiiSchott's calicoV
136PolSaltugilia australissouthern gilia4
137PolChorizanthe brevicornu var. brevicornubrittle spineflowerV
138PolChorizanthe fimbriata var. laciniatalace-fringed spineflowerV
139PolEriogonum davidsoniiDavidson's buckwheat10
140PolEriogonum fasciculatum var. polifoliumCalifornia buckwheat65
141PolEriogonum gracile var. incultumslender buckwheatV
142PolEriogonum plumatellayucca buckwheat20
143PolEriogonum thurberiThurber's buckwheat5
144PolEriogonum wrightii var. nodosumWright's buckwheat60
145PolPterostegia drymarioidesfairy bowties, threadstemV
146RanDelphinium parishii ssp. subglobosumintermediate larkspur4
147RhaZiziphus parryi var. parryilotebushV
148RosPrunus fasciculata var. fasciculatadesert almond10
149RosPrunus fremontiidesert apricot99
150RosPrunus ilicifolia ssp. ilicifoliahollyleaf cherry2
151RubGalium angustifolium ssp. borregoenseBorrego bedstraw5
152SimSimmondsia chinensisjojoba35
153SolDatura wrightiisacred datura4
154SolLycium andersoniiAnderson's boxthorn10
155SolLycium cooperiCooper's boxthorn5
156SolNicotiana obtusifoliadesert tobacco25
157SolPhysalis crassifoliathick-leaved ground cherry15
158VisPhoradendron bolleanumdense mistletoeV
159VisPhoradendron californicumdesert mistletoe25
160ZygLarrea tridentatacreosote bush50
161AgaAgave deserti var. desertidesert agave99
162AgaYucca schidigeraMohave yucca35
163AllAllium fimbriatum var. fimbriatumfringed onionV
164LilCalochortus splendenssplendid mariposa lilyV
165PoaAristida adscensionissix-weeks three-awn99
166PoaAristida purpureapurple three-awn20
167PoaAristida purpurea var. nealleyiNealley three-awnV
168PoaAristida purpurea var. wrightiiWright three-awnV
169PoaBouteloua aristidoides var. aristidoidesneedle grama99
170PoaBouteloua barbata var. barbatasix-weeks grama99
171PoaBouteloua curtipendulaside-oats grama2
172PoaBromus berteroanusChilean chess2
173PoaBromus madritensis ssp. rubens*red brome99
174PoaDasyochloa pulchellafluff grassV
175PoaFestuca octoflorasix-weeks fescueV
176PoaHeteropogon contortustanglehead21
177PoaHilaria rigidabig galleta99
178PoaMelica frutescenstall melica50
179PoaMuhlenbergia appressaappressed muhlyV
180PoaMuhlenbergia microspermalittleseed muhly60
181PoaMuhlenbergia porteriPorter's muhly4
182PoaPoa secunda ssp. secundaone-sided bluegrass10
183PoaSchismus barbatus*Mediterranean schismus99
184PoaSporobolus cryptandrussand dropseed1
185PoaStipa parishii var. parishiiParish's needlegrass8
186PoaStipa speciosadesert needlegrass15
187RusNolina parryiParry's nolina36
188TheDichelostemma capitatum ssp. pauciflorumfew-flowered blue dicksV
189TheMuilla maritimamuillaV

Voucher data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/consortium/)

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Copyright © 2014-2018 by Tom Chester (3), Carla Hoegen (3), Fred Melgert (3), Nancy Accola (1), Kate Harper (0.5), RT Hawke (0.5), and Shaun Hawke (0.5). The number of equivalent full day surveys done by each author is given in parentheses after the author name.
Permission is freely granted to reproduce any or all of this page as long as credit is given to us at this source:
Comments and feedback: Tom Chester
Last update: 14 February 2018