Flora of Jct. SR138 / Highway 18 Area, east of Palmdale

Fig. 1. Typical appearance of the flowers in this area on 29 March 2014, showing the large beautiful flowers of Gilia latiflora; the ground-hugging cute clusters of Linanthus parryae; a single plant of Phacelia distans in the bottom center; the large yellow flowers of Camissonia campestris; and other species.

We became interested in this area in March 2014 after Keir Morse and RT Hawke reported on 18 and 20 March 2014 that it was experiencing an unusually-good bloom, which was especially surprising in that poor rainfall year. Rains in November 2013 must have hit this area hard, germinating many species which survived until the good rain in March 2014 allowed them to further thrive.

Fig. 2 gives a large-scale map showing where this area is relative to other places in the western Mojave Desert.

Fig. 2. Area locator map showing voucher locations (red dots) in or nearby the area we surveyed.

Major surveys of this area were done on 3/29/14; 4/3/14; and 4/7/14 by groups of four or more of the authors. Keir Morse and others surveyed the Black Butter Area on 4/6/14. Walt Fidler surveyed the area on several additional days. Four authors visited Pinon Hills briefly on 4/30/14.

Fig. 3 shows the areas where we stopped along the roads and surveyed for species.

Fig. 3. Map showing voucher locations (red dots) and the areas where we surveyed for species in the major surveys (inside the black circles).

Vouchers with coordinates were searched on 28 March 2014 for latitude 34.45 to 34.54°, and longitude -117.80 to -117.58°.

The checklist below gives the number of vouchers found in the search area, in the column with header #V, and our estimate of the minimum abundance for each species we saw, up to a maximum of 99 plants, in the column with header #Pls. An x in the latter column indicates a species found by Keir or Walt in their additional surveys, where no estimate of the plant abundance was made.

None of us are experts in this area, and there may be a few misdeterminations in the following list, both in the vouchers and in our determinations. Some of our determinations were made by assuming the vouchered species were the correct determination; others were made using nearby vouchers. Some determinations were made in the field; others with more careful work later at home.

We have many photographs of species from this area. Michael Charters is in the process of making a field gallery photo page from his photographs, which we will link to when it is ready. We were absolutely delighted to find both Phacelia distans and P. tanacetifolia here, and Tom made a special page showing the differences.

Version for printing, without lines and 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)

See Information about the order in which the species are presented, and the links from the Scientific Name and Common Name.

#FamilScientific Name(*)Common Name#V#Pls
1PteriCheilanthes covilleibeady lipfern1 
2CupreJuniperus californicaCalifornia juniper330
3CupreJuniperus osteospermaUtah juniper1 
4EphedEphedra nevadensisNevada ephedra15
5ApiacLomatium mohavenseMojave lomatium 5
6ApocyAmsonia tomentosawoolly amsonia1 
7ApocyAsclepias vestitawoolly milkweed24
8AsterAcamptopappus sphaerocephalus var. hirtellushairy goldenhead150
9AsterAcamptopappus sphaerocephalus var. sphaerocephalusgoldenhead1 
10AsterAmbrosia acanthicarpabur-ragweed 20
11AsterAmbrosia dumosaburroweed450
12AsterAmbrosia salsola var. salsolacheesebush150
13AsterAnisocoma acaulisscale-bud22
14AsterArtemisia dracunculuswild tarragon1 
15AsterBaileya pleniradiatawoolly marigold x
16AsterChaenactis fremontiiFremont pincushion599
17AsterChaenactis stevioidesdesert pincushion4 
18AsterChaenactis xantianaXantus' chaenactis1 
19AsterCotula coronopifolia*brass-buttons1 
20AsterEncelia actoniActon encelia110
21AsterEricameria cooperi var. cooperiCooper's goldenbush150
22AsterEricameria linearifolianarrowleaf goldenbush120
23AsterEricameria nauseosa var. hololeucaghostly rabbitbrush11
24AsterEriophyllum pringleiPringle's woolly sunflower699
25AsterEriophyllum wallacei var. wallaceiWallace's woolly daisy620
26AsterGlyptopleura marginatacarved-seed210
27AsterGutierrezia microcephalasticky snakeweed 5
28AsterLasthenia gracilisgoldfields 99
29AsterLayia glandulosawhite tidy-tips799
30AsterLepidospartum squamatumscale-broom15
31AsterLeptosyne bigeloviiBigelow's coreopsis2 
32AsterLeptosyne californicaCalifornia coreopsis499
33AsterLeptosyne douglasiiDouglas' coreopsis1 
34AsterLessingia glandulifera var. glanduliferasticky lessingia21
35AsterLogfia depressadwarf filago220
36AsterMalacothrix glabratadesert dandelion799
37AsterRafinesquia californicaCalifornia chicory 3
38AsterStephanomeria exigua ssp. exiguaslender wreathplant23
39AsterStephanomeria parryiParry's stephanomeria2 
40AsterStylocline psilocarphoidesPeck's stylocline1 
41AsterSyntrichopappus fremontiiFremont's syntrichopappus 1
42AsterTetradymia axillaris var. longispinacatclaw horsebrush320
43AsterTetradymia stenolepisMojave horsebrush 15
44AsterUropappus lindleyisilver puffs210
45AsterXylorhiza tortifolia var. tortifoliaMojave-aster15
46BoragAmsinckia intermediacommon fiddleneck1 
47BoragAmsinckia tessellatabristly fiddleneck399
48BoragCryptantha barbigera var. barbigerabearded cryptantha 2
49BoragCryptantha circumscissa var. circumscissacushion cryptantha999
50BoragCryptantha decipiensgravel cryptantha630
51BoragCryptantha dumetorumbush-loving cryptantha23
52BoragCryptantha micrantha var. micranthared-root cryptantha230
53BoragCryptantha muricata var. denticulataprickly cryptantha1 
54BoragCryptantha nevadensis var. nevadensisNevada cryptantha 1
55BoragCryptantha pterocarya var. pterocaryawing-nut cryptantha899
56BoragCryptantha similiscushion cryptantha150
57BoragEmmenanthe penduliflora var. penduliflorawhispering bells110
58BoragEriodictyon trichocalyxsmoothleaf yerba santa1 
59BoragNama demissum var. demissumpurple mat599
60BoragNemophila menziesiibaby blue eyes x
61BoragPectocarya linearis ssp. feroculaslender combseed 99
62BoragPectocarya penicillatacombseed499
63BoragPectocarya recurvatacurvenut combseed299
64BoragPectocarya setosamoth combseed4 
65BoragPhacelia bicolor var. bicolortwo-colored phacelia 40
66BoragPhacelia cicutaria var. hispidacaterpillar phacelia1 
67BoragPhacelia curvipescurve-stem phacelia2 
68BoragPhacelia davidsoniiDavidson's phacelia1 
69BoragPhacelia distanscommon phacelia499
70BoragPhacelia fremontiiFremont's phacelia915
71BoragPhacelia tanacetifoliatansy-leafed phacelia399
72BoragPholistoma membranaceumwhite fiesta flower22
73BoragPlagiobothrys arizonicusArizona popcorn flower220
74BoragTiquilia canescensshrubby coldenia1 
75BoragTiquilia nuttalliiNuttall's coldenia x
76BoragTiquilia plicataplicate coldenia 15
77BrassBoechera pulchra, B. xylopodabeautiful rock-cress2 
78BrassBoechera xylopodaslender & beautiful rock-cress1 
79BrassCaulanthus cooperiCooper's jewel-flower410
80BrassCaulanthus lasiophyllusCalifornia mustard220
81BrassDescurainia pinnatawestern tansy-mustard41
82BrassDithyrea californicaspectacle-pod4 
83BrassLepidium flavumyellow pepper-grass199
84BrassLepidium fremontiidesert pepper-grass21
85BrassSisymbrium orientale*Oriental mustard15
86BrassStreptanthella longirostrislongbeak streptanthella215
87BrassThysanocarpus laciniatuslace-pod1 
88CactaCylindropuntia echinocarpasilver cholla 10
89CactaOpuntia basilaris var. basilarisbeavertail cactus 1
90CactaOpuntia basilaris var. brachycladashort-joint beavertail 1
91CampaNemacladus sigmoideussmall-flowered nemacladus21
92CaryoEremogone macradeniadesert sandwort2 
93CaryoLoeflingia squarrosaspreading loeflingia 2
94ChenoAtriplex canescensfourwing saltbush210
95ChenoChenopodium californicumCalifornia goosefoot3 
96ChenoGrayia spinosahop-sage33
97ChenoKrascheninnikovia lanatawinter fat115
98ChenoSalsola tragus*Russian thistle3 
99ConvoCuscuta californica var. californicaCalifornia dodder2 
100ConvoCuscuta denticulatadesert dodder 5
101EuphoChamaesyce albomarginatarattlesnake weed120
102EuphoCroton californicusCalifornia croton33
103FabacAcmispon glaber var. brevialatusshort-winged deerweed2 
104FabacAstragalus lentiginosus var. variabilisfreckled milk-vetch15
105FabacLupinus concinnusbajada lupine32
106FabacLupinus odoratusMojave lupine55
107GeranErodium cicutarium*redstem filaree199
108LamiaMonardella exilisMojave monardella131
109LamiaSalvia carduaceathistle sage699
110LamiaSalvia columbariaechia420
111LamiaSalvia dorrii var. dorriiblue sage25
112LamiaSalvia dorrii var. pilosahairy sage3 
113LamiaScutellaria mexicanaMexican bladder sage110
114LoasaMentzelia albicauliswhite-stemmed blazing star599
115LoasaMentzelia jonesiiJones' blazing star299
116LoasaMentzelia nitensshining blazing star1 
117LoasaMentzelia veatchianaVeatch's blazing star120
118MalvaEremalche exiliswhite mallow220
119MontiCalyptridium monandrumsand cress499
120NyctaAbronia pogonanthaMojave sand verbena299
121NyctaAbronia villosa var. villosahairy sand-verbena 5
122NyctaMirabilis laevis var. retrorsaBigelow's desert four-o'clock 5
123NyctaMirabilis laevis var. villosaBigelow's desert four-o'clock2 
124OnagrCamissonia campestris ssp. campestrisfield suncup699
125OnagrCamissonia kernensis ssp. gilmaniiGilmans evening-primrose1 
126OnagrCamissoniopsis pallida ssp. pallidapale suncup399
127OnagrChylismia claviformis ssp. claviformisbrown-eyed primrose230
128OnagrEremothera boothii ssp. decorticansBooth's evening primrose1 
129OnagrEulobus californicusCalifornia suncup 50
130OnagrOenothera californica ssp. avitaCalifornia evening-primrose 1
131OnagrOenothera deltoidesdune primrose 4
132OrobaCastilleja exserta ssp. venustapurple owl's-clover 7
133OrobaCastilleja plagiotomaMojave Indian paintbrush4 
134OrobaOrobanche cooperiCooper's broomrape 1
135PapavCanbya candidapygmy poppy4 
136PapavEschscholzia minutiflorasmall-flowered poppy120
137PhrymMimulus bigeloviiBigelow's monkeyflower2 
138PhrymMimulus fremontii var. fremontiiFremont's monkeyflower999
139PlantPenstemon centranthifoliusscarlet bugler2 
140PolemEriastrum eremicum ssp. eremicumdesert woolly-star 99
141PolemEriastrum sapphirinumsapphire woolly-star399
142PolemEriastrum sparsiflorumGreat Basin woolly-star1 
143PolemGilia aliquanta ssp. aliquantapuff-calyx gilia22
144PolemGilia jacensNevada gilia 2
145PolemGilia latiflora ssp. davyibroad-flowered gilia1 
146PolemGilia latiflora ssp. latifloraholly-leaf gilia599
147PolemGilia ochroleuca ssp. ochroleucavolcanic gilia11
148PolemGilia sinuatarosy gilia730
149PolemGilia stellatastar gilia 20
150PolemLeptosiphon aureusgolden linanthus1x
151PolemLeptosiphon breviculusMojave linanthus2 
152PolemLeptosiphon parviflorusshowy linanthus1 
153PolemLinanthus dichotomus ssp. dichotomusevening-snow299
154PolemLinanthus parryaesand-blossoms599
155PolemLoeseliastrum matthewsiidesert calico299
156PolemLoeseliastrum schottiiSchott's calico1 
157PolygCentrostegia thurberired triangles699
158PolygChorizanthe brevicornu var. brevicornubrittle spineflower299
159PolygChorizanthe watsoniiWatson's spineflower25
160PolygEriogonum angulosumangled-stem buckwheat1 
161PolygEriogonum brachyanthumshort-flowered buckwheat1 
162PolygEriogonum davidsoniiDavidson's buckwheat210
163PolygEriogonum fasciculatum var. polifoliumCalifornia buckwheat140
164PolygEriogonum gracillimumrose and white buckwheat x
165PolygEriogonum maculatumspotted buckwheat 20
166PolygEriogonum mohavensewestern Mojave buckwheat1 
167PolygEriogonum plumatellayucca buckwheat15
168PolygEriogonum pusillumyellow-turbans2 
169PolygMucronea perfoliataperfoliate spineflower 2
170PolygRumex hymenosepaluswild rhubarb x
171RanunClematis ligusticifoliavirgin's bower 1
172RanunDelphinium parishii ssp. subglobosumintermediate larkspur23
173RhamnCeanothus greggiidesert ceanothus1 
174RhamnFrangula californicaCalifornia coffeeberry1 
175RosacPrunus fasciculata var. fasciculatadesert almond 5
176RosacPurshia tridentata var. glandulosadesert bitterbrush35
177RubiaGalium angustifolium ssp. angustifoliumnarrowleaf bedstraw2 
178SolanLycium andersoniiAnderson's boxthorn25
179SolanLycium cooperiCooper's boxthorn420
180ViscaPhoradendron bolleanumdense mistletoe1 
181ZygopLarrea tridentatacreosote bush499
182AgavaYucca brevifoliajoshua tree 99
183AlliaAllium fimbriatumfringed onion1 
184LiliaCalochortus kennedyi var. kennedyired mariposa 99
185MelanToxicoscordion brevibracteatusdesert death-camas110
186PoaceArundo donax*giant reed2 
187PoaceBromus madritensis ssp. rubens*red brome299
188PoaceBromus tectorum*downy brome 99
189PoaceDasyochloa pulchellafluff grass 20
190PoaceFestuca microstachyssmall fescue1 
191PoaceFestuca octoflorasix-weeks fescue1x
192PoaceHordeum murinum*foxtail barley x
193PoacePoa secunda ssp. juncifoliarush blue grass350
194PoaceSchismus arabicus*Mediterranean grass2 
195PoaceSchismus barbatus*Mediterranean schismus199
196PoaceStipa hymenoidesIndian ricegrass299
197PoaceStipa speciosadesert needlegrass330
198PoaceTriticum aestivum*common wheat 1
199ThemiDichelostemma capitatum ssp. capitatumblue dicks 99
200ThemiMuilla coronatacrowned muilla 99

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Copyright © 2014 by Tom Chester, Walt Fidler, Keir Morse, Kate Harper, Michael Charters, Adrienne Ballwey, RT Hawke, Shaun Hawke, Aaron Schusteff, Gabi McLean, and Harry Spilman. Authors are listed in order of the amount of time spent in surveys here.
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: 4 May 2014