Flora of Canyon Sin Nombre Area, Anza-Borrego Desert State Park

Fig. 1. Map showing the Canyon Sin Nombre Area, with the surveyed areas (red lines) and voucher locations (blue diamonds). Many of the voucher locations are not very accurate since the georeferencing was done from vague localities. The blue line shows a short survey south of Sweeney Pass.

This flora is targeted to the Canyon Sin Nombre Area, including the portion of S2 from Carrizo Creek to Sweeney Pass and a bit east; the part of the Carrizo Badlands south of Carrizo Creek, and the westernmost part of the Coyote Mountains; see Fig. 1.

This list has been compiled from vouchers; from a number of field trips by Carla Hoegen and Fred Melgert; a field trip on 28 November 2016 by Nancy Accola, Tom Chester, Kate Harper, Carla Hoegen, Fred Melgert, Keir Morse, and Jim Roberts; and from a field trip by Tom Chester and Kate Harper in the Sweeney Pass area.

The vouchers were obtained by a search for georeferenced vouchers in the following area: 32.82 to 32.87° N. latitude, and -116.20 to -116.10° E. Longitude. Vouchers that were outside our target area, such as the ones from Carrizo Creek and the Domelands, were removed. The georeferenced voucher locations are shown in Fig. 1. Many of the voucher locations are not very accurate since the georeferencing was done from vague localities such as "about 2 miles southwest of Carrizo Station".

Field trips by Carla and Fred are shown in Fig. 1. Beautiful pictures of the area and of a large number of the species they found are on their pages for each trip:

Although our targeted area is along S2 and north of it, we have included six species from one survey in a drainage south of Sweeney Pass, since it seems likely that at least some of those species will be found in our targeted area, such as chia, Salvia columbariae.


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

The column #V gives the number of vouchers in the Canyon Sin Nombre area. Due to the imprecision of the locality for some vouchers, some vouchered species may not actually be present in this area.

The column labeled #Pls gives the minimum number of plants for each species, up to a maximum of 99 plants, recorded in the 28 November 2016 survey. Since that was not an optimal time of year for annuals and some perennials, many of those numbers are severe underestimates. An x, ~ or ? in this column denotes a species observed in this area by Carla Hoegen and Fred Melgert on prior trips when no abundance estimate was made. An x indicates a solid determination; a ~ indicates a probable determination; and a ? indicates that the determination is just a guess at the moment.

Species with no entries in either column were from the single survey south of Sweeney Pass.

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#FamilScientific Name(*) Common Name#V#Pls
1PteriCheilanthes parryiwoolly lipfern16
2EphedEphedra asperaMormon tea x
3EphedEphedra californicadesert tea115
4EphedEphedra trifurcalong-leafed ephedra ?
5AcantCarlowrightia arizonicaArizona carlowrightia1 
6AcantJusticia californicachuparosa220
7AizoaSesuvium verrucosumwestern sea-purslane1 
8AmaraTidestromia suffruticosa var. oblongifoliaArizona honeysweet1 
9ApocyAsclepias albicanswhite-stemmed milkweed 1
10ApocyAsclepias subulatarush milkweed 15
11ApocyFunastrum utahenseUtah vine milkweed 20
12ApocyMatelea parvifoliaspearleaf 3
13ApodaPilostyles thurberiThurber's pilostyles5 
14AsterAdenophyllum porophylloidesSan Felipe dogweed 50
15AsterAmbrosia dumosaburroweed499
16AsterAmbrosia salsola var. salsolacheesebush699
17AsterBaileya pauciradiataColorado Desert marigold2 
18AsterBebbia juncea var. asperasweetbush350
19AsterCalycoseris wrightiiwhite tackstem1x
20AsterChaenactis carphoclinia var. carphocliniapebble pincushion12
21AsterChaenactis fremontiiFremont pincushion1 
22AsterChaenactis stevioidesdesert pincushion71
23AsterDicoria canescensdesert dicoria1x
24AsterEncelia farinosabrittlebush599
25AsterEncelia frutescensbutton encelia420
26AsterEricameria paniculatablackbanded rabbitbrush2x
27AsterGeraea canescenshairy desert-sunflower3?
28AsterIsocoma acradenia var. eremophilasolitary-leaved alkali goldenbush220
29AsterLogfia depressadwarf filago1 
30AsterMalacothrix glabratadesert dandelion3x
31AsterMonoptilon bellioidesdesert star4x
32AsterPalafoxia arida var. aridaSpanish needle510
33AsterPectis papposa var. papposachinch-weed11
34AsterPerityle emoryiEmory's rock-daisy320
35AsterPleurocoronis plurisetaarrow-leaf320
36AsterPsathyrotes ramosissimaturtleback33
37AsterRafinesquia neomexicanadesert chicory3x
38AsterSenecio mohavensisMojave ragwort42
39AsterStephanomeria exigua ssp. exiguaslender wreathplant2 
40AsterStephanomeria pauciflorawire-lettuce115
41AsterStylocline intertextatangled nest-straw1 
42AsterTrichoptilium incisumyellow-head1x
43AsterTrixis californica var. californicaCalifornia trixis22
44AsterXylorhiza orcuttiiOrcutt's woody-aster436
45BignoChilopsis linearis ssp. arcuatadesert-willow x
46BoragAmsinckia tessellata var. tessellatabristly fiddleneck1 
47BoragCryptantha angustifolianarrow-leaved cryptantha630
48BoragCryptantha barbigera var. barbigerabearded cryptantha1 
49BoragCryptantha maritimaGuadalupe cryptantha41
50BoragCryptantha micrantha var. micranthared-root cryptantha3x
51BoragCryptantha nevadensisNevada cryptantha2 
52BoragCryptantha pterocarya var. cyclopteraTucson wing-nut cryptantha1 
53BoragCryptantha racemosabushy cryptantha1 
54BoragEmmenanthe penduliflora var. penduliflorawhispering bells 1
55BoragEucrypta micranthadesert eucrypta1 
56BoragHeliotropium curassavicum var. oculatumseaside heliotrope1x
57BoragPectocarya heterocarpachuckwalla pectocarya2 
58BoragPectocarya peninsularisBaja pectocarya2 
59BoragPectocarya platycarpabroad-fruited combseed1 
60BoragPectocarya recurvatacurvenut combseed3?
61BoragPhacelia cicutaria var. hispidacaterpillar phacelia x
62BoragPhacelia crenulata var. ambiguaheliotrope phacelia3~
63BoragPhacelia crenulata var. minutifloralittle-flowered heliotrope phacelia1~
64BoragPhacelia distanscommon phacelia650
65BoragTiquilia palmeriPalmer's coldenia 5
66BoragTiquilia plicataplicate coldenia15
67BrassBrassica tournefortii*Sahara mustard45
68BrassCaulanthus lasiophyllusCalifornia mustard1 
69BrassDescurainia pinnatawestern tansy-mustard1 
70BrassDithyrea californicaspectacle-pod3x
71BrassDraba cuneifoliawedge-leaved draba1 
72BrassLepidium fremontiidesert pepper-grass1 
73BrassLepidium lasiocarpum ssp. lasiocarpumhairy-podded pepper-grass420
74BrassSisymbrium irio*London rocket2 
75BrassStreptanthella longirostrislongbeak streptanthella4 
76CactaCylindropuntia bigeloviiteddy-bear cholla199
77CactaCylindropuntia echinocarpasilver cholla199
78CactaCylindropuntia ganderiGander's cholla399
79CactaCylindropuntia ramosissimapencil cholla 20
80CactaCylindropuntia wolfiiWolf's cholla1 
81CactaEchinocereus engelmanniiEngelmann's hedgehog cactus 1
82CactaFerocactus cylindraceusCalifornia barrel cactus315
83CactaMammillaria dioicaCalifornia fish-hook cactus11
84CactaMammillaria tetrancistradesert fish-hook cactus  
85CactaOpuntia basilaris var. basilarisbeavertail cactus130
86CampaNemacladus rubescensdesert nemacladus1 
87CampaNemacladus tenuis var. aliformisdesert threadplant1 
88CaryoAchyronychia cooperifrost mat2 
89ChenoAtriplex canescens var. laciniataCaleb saltbush x
90ChenoAtriplex hymenelytradesert holly320
91ChenoAtriplex polycarpacattle saltbush140
92ChenoMonolepis nuttallianaNuttall's poverty weed1 
93ConvoCuscuta denticulatadesert dodder 50
94EuphoChamaesyce arizonicaArizona spurge1 
95EuphoChamaesyce micromeraSonoran spurge 99
96EuphoChamaesyce polycarpasmall-seeded spurge699
97EuphoChamaesyce setilobastarfish (Yuma) spurge199
98EuphoCroton californicusCalifornia croton51
99EuphoDitaxis lanceolatanarrowleaf ditaxis150
100EuphoDitaxis neomexicanaNew Mexico ditaxis1 
101EuphoStillingia spinulosaannual stillingia1 
102FabacAcmispon glaber var. brevialatusshort-winged deerweed  
103FabacAcmispon maritimus var. brevivexillusshort-bannered coastal lotus1 
104FabacAcmispon strigosusstrigose lotus35
105FabacAstragalus crotalariaeSalton milk-vetch1 
106FabacAstragalus didymocarpus var. dispermusdwarf white milk-vetch2 
107FabacAstragalus insularis var. harwoodiiHarwood's milk-vetch1 
108FabacAstragalus nuttallianus var. imperfectusturkey-peas1 
109FabacDalea mollissimadowny dalea12
110FabacHoffmannseggia glaucahog potato1 
111FabacHoffmannseggia microphyllawand holdback630
112FabacLupinus arizonicusArizona lupine810
113FabacLupinus concinnusbajada lupine 2
114FabacLupinus excubitus var. mediusMountain Springs bush lupine1 
115FabacLupinus shockleyidesert lupine1 
116FabacProsopis glandulosa var. torreyanahoney mesquite22
117FabacPsorothamnus emoryiEmory's indigo-bush41
118FabacPsorothamnus schottiiindigo bush599
119FabacPsorothamnus spinosussmoke tree 30
120FabacSenegalia greggiicatclaw 20
121FouquFouquieria splendens ssp. splendensocotillo450
122GeranErodium cicutarium*redstem filaree2x
123GeranErodium texanumTexas filaree1 
124KrameKrameria bicolorwhite rhatany399
125KrameKrameria erectaPima rhatany 3
126LamiaHyptis emoryidesert-lavender420
127LamiaSalvia columbariaechia  
128LoasaMentzelia affinisyellow blazing star1~
129LoasaMentzelia involucratabracted blazing star4 
130LoasaMentzelia obscuraPacific blazing star1 
131LoasaPetalonyx thurberi ssp. thurberiThurber's sandpaper-plant3x
132MalvaEremalche exiliswhite mallow1 
133MalvaHibiscus denudatusrock hibiscus215
134MalvaHorsfordia newberryiNewberry's velvet mallow3 
135MartyProboscidea althaeifoliadesert unicorn-plant1 
136MolluMollugo cerviana*carpet-weed1 
137MontiCalyptridium monandrumsand cress1 
138MontiCistanthe ambiguadesert red maids1 
139NyctaAbronia villosa var. villosahairy sand-verbena5x
140NyctaAllionia incarnata var. incarnatasmall-flowered trailing four o'clock 10
141NyctaBoerhavia triquetra var. intermediafivewing spiderling  
142NyctaBoerhavia wrightiiWright's spiderling12
143NyctaMirabilis laevis var. retrorsaBigelow's desert four-o'clock210
144NyctaMirabilis tenuilobaslender-lobed four o'clock1 
145OnagrCamissoniopsis pallida ssp. pallidapale suncup1x
146OnagrChylismia cardiophylla ssp. cardiophyllaheartleaf suncup41
147OnagrChylismia claviformis ssp. peirsoniibrown-eyed primrose1440
148OnagrEremothera boothii ssp. condensataBooth's evening primrose320
149OnagrEulobus californicusCalifornia suncup450
150OnagrOenothera deltoides ssp. deltoidesdune primrose1 
151OrobaOrobanche cooperiCooper's broomrape1~
152PapavEschscholzia minutiflora ssp. minutiflorasmall-flowered poppy2x
153PapavEschscholzia parishiiParish's poppy21
154PhrymMimulus bigelovii var. bigeloviiBigelow's monkeyflower11x
155PlantAntirrhinum filipesdesert twining snapdragon11
156PlantMohavea confertifloraghost flower2x
157PlantPlantago ovatadesert plantain250
158PolemAliciella latifolia ssp. latifoliabroad-leaf gilia22
159PolemEriastrum diffusumminiature woolly-star1?
160PolemEriastrum harwoodiiHarwood's woolly-star1 
161PolemGilia stellatastar gilia1 
162PolemLangloisia setosissima ssp. setosissimabristly langloisia22
163PolemLoeseliastrum schottiiSchott's calico2 
164PolygChorizanthe brevicornu var. brevicornubrittle spineflower21
165PolygChorizanthe corrugatawrinkled spineflower2 
166PolygChorizanthe rigidadevil's spineflower2x
167PolygEriogonum deflexum var. deflexumflat-topped buckwheat1 
168PolygEriogonum inflatumdesert trumpet350
169PolygEriogonum thomasiiThomas' buckwheat42
170ResedOligomeris linifolialineleaf whitepuff2x
171RubiaGalium stellatumstar-flowered bedstraw 2
172SimmoSimmondsia chinensisjojoba1 
173SolanDatura wrightiisacred datura ~
174SolanNicotiana clevelandiiCleveland's tobacco1 
175SolanNicotiana glauca*tree tobacco x
176SolanPhysalis crassifoliathick-leaved ground cherry  
177TamarTamarix aphylla*athel x
178TamarTamarix gallica*French tamarisk1 
179TamarTamarix ramosissima*saltcedar x
180UrticParietaria hespera var. hesperapellitory1 
181ViscaPhoradendron californicumdesert mistletoe410
182ZygopFagonia laevisCalifornia fagonia1 
183ZygopLarrea tridentatacreosote bush699
184AgavaAgave deserti var. desertidesert agave120
185AgavaHesperocallis undulatadesert lily11
186PoaceAristida adscensionissix-weeks three-awn140
187PoaceAristida purpureapurple three-awn  
188PoaceBouteloua aristidoides var. aristidoidesneedle grama 1
189PoaceBouteloua barbata var. barbatasix-weeks grama 2
190PoaceBromus madritensis ssp. rubens*red brome1 
191PoaceDistichlis spicatasaltgrass1 
192PoaceFestuca octoflorasix-weeks fescue1 
193PoaceHilaria rigidabig galleta499
194PoaceHordeum murinum*foxtail barley1 
195PoaceSchismus barbatus*Mediterranean schismus410

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

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Copyright © 2016 by Tom Chester, Carla Hoegen, Fred Melgert, Nancy Accola, Kate Harper, Keir Morse, and Jim Roberts
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: 2 December 2016