Flora of Uppermost Box Canyon Road near I-10, Riverside County


This flora is compiled from vouchers and from unreviewed iNat observations, as of 16 January 2020, with an additional six species from a brief survey on 17 January 2020 by the authors.

Vouchers and Inat were each searched using the following rectangle: 33.63 to 33.66° N. Latitude, and -115.82 to -115.78 E. Longitude. This rectangle roughly extends from I-10 south to the north base of the Orocopia Mountains, and about the same distance east-west, centered on the longitude where Box Canyon Road meets I-10.

Voucher localities were reviewed, and ones with vague localities were tossed.

iNat observations with extremely large position uncertainties were tossed, as well as ones with obscured coordinates.

Checklist for Mecca Hills / Box Canyon Area


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

The column with header #V gives the number of vouchers in this area. The column with header #iNat gives the number of iNat observations in this area. An "x" in this column indicates an additional species observed by the authors, with a "~" in front of the x if the species wasn't identified securely.

There are no lycopods; ferns; or gymosperms in this flora!

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#FamilScientific Name(*)Common Name#V#iNat
1ApocyAsclepias subulatarush milkweed11
2AsterAmbrosia dumosaburroweed 14
3AsterAmbrosia salsolacheesebush29
4AsterAtrichoseris platyphyllagravel-ghost32
5AsterBahiopsis parishiiParish's goldeneye 1
6AsterBebbia juncea var. asperasweetbush 3
7AsterBrickellia incanawoolly brickellia5
8AsterChaenactis carphoclinia var. carphocliniapebble pincushion1
9AsterChaenactis fremontiiFremont pincushion 1
10AsterEncelia farinosabrittlebush 11
11AsterMalacothrix glabratadesert dandelion 2
12AsterMonoptilon bellidiformedesert star11
13AsterMonoptilon bellioidesdesert star11
14AsterPalafoxia arida var. aridaSpanish needle2
15AsterPectis papposa var. papposachinch-weed31
16AsterPerityle emoryiEmory's rock-daisy 3
17AsterPeucephyllum schottiipygmy-cedar12
18AsterPleurocoronis plurisetaarrow-leaf 1
19AsterRafinesquia neomexicanadesert chicory 1
20AsterSenecio mohavensisMojave ragwort 3
21AsterStephanomeria pauciflorawire-lettuce 1
22AsterTrichoptilium incisumyellow-head22
23AsterTrixis californica var. californicaCalifornia trixis 2
24AsterXylorhiza tortifolia var. tortifoliaMojave-aster1
25BignoChilopsis linearis ssp. arcuatadesert-willow1
26BoragCryptantha angustifolianarrow-leaved cryptantha32
27BoragCryptantha barbigera var. barbigerabearded cryptantha1
28BoragCryptantha maritimaGuadalupe cryptantha1
29BoragCryptantha pterocaryawing-nut cryptantha 1
30BoragEmmenanthe penduliflora var. penduliflorawhispering bells16
31BoragEucrypta chrysanthemifoliaeucrypta 1
32BoragNama demissa var. demissapurple mat26
33BoragPectocarya anisocarpaBlair Valley combseed 1
34BoragPectocarya platycarpabroad-fruited combseed 1
35BoragPectocarya recurvatacurvenut combseed1
36BoragPhacelia campanulariadesert bluebells 4
37BoragPhacelia crenulataheliotrope phacelia 4
38BoragPhacelia crenulata var. ambiguaheliotrope phacelia1
39BoragPhacelia distanscommon phacelia 5
40BoragTiquilia palmeriPalmer's coldenia1
41BrassBrassica tournefortii*Sahara mustard 12
42BrassCaulanthus lasiophyllusCalifornia mustard11
43BrassDescurainia pinnatawestern tansy-mustard 3
44BrassDithyrea californicaspectacle-pod1
45BrassLepidium fremontiidesert pepper-grass12
46BrassLepidium lasiocarpum ssp. lasiocarpumhairy-podded pepper-grass12
47BrassSisymbrium irio*London rocket14
48CactaCylindropuntia echinocarpasilver cholla 21
49CactaCylindropuntia ramosissimapencil cholla 15
50CactaEchinocereus engelmanniiEngelmann's hedgehog cactus 4
51CactaOpuntia basilaris var. basilarisbeavertail cactus 11
52CampaNemacladus glanduliferusglandular nemacladus 1
53CaryoAchyronychia cooperifrost mat 1
54CleomPeritoma arboreabladderpod x
55CrassCrassula connatapygmy-weed 1
56CucurBrandegea bigeloviidesert star-vine15
57EuphoChamaesyce micromeraSonoran spurge2
58EuphoChamaesyce polycarpasmall-seeded spurge24
59EuphoChamaesyce setilobastarfish (Yuma) spurge21
60EuphoCroton californicusCalifornia croton2
61EuphoDitaxis lanceolatanarrowleaf ditaxis 1
62EuphoDitaxis neomexicanaNew Mexico ditaxis1
63EuphoDitaxis serrata var. californicaCalifornia ditaxis2
64EuphoEuphorbia erianthabeetle spurge1
65FabacAcmispon strigosusstrigose lotus24
66FabacDalea mollissilky dalea 1
67FabacLupinus arizonicusArizona lupine518
68FabacOlneya tesotaironwood15
69FabacParkinsonia floridablue palo verde15
70FabacParkinsonia microphyllayellow palo verde1
71FabacPsorothamnus schottiiindigo bush 2
72FabacPsorothamnus spinosussmoke tree11
73FabacSenegalia greggiicatclaw12
74FabacSenna armataspiny senna 4
75FouquFouquieria splendens ssp. splendensocotillo215
76GeranErodium cicutarium*redstem filaree 5
77GeranErodium texanumTexas filaree 2
78KrameKrameria bicolorwhite rhatany1
79LamiaHyptis emoryidesert-lavender18
80LamiaSalvia columbariaechia110
81LoasaMentzelia albicauliswhite-stemmed blazing star 2
82LoasaMentzelia involucratabracted blazing star28
83LoasaPetalonyx thurberi ssp. thurberiThurber's sandpaper-plant3
84MalvaEremalche rotundifoliadesert five-spot11
85MalvaSphaeralcea ambiguaapricot mallow 7
86MalvaSphaeralcea ambigua var. ambiguaapricot mallow1
87MolluMollugo cerviana*carpet-weed1
88MontiCalyptridium monandrumsand cress 2
89NyctaAbronia villosahairy sand verbena1
90NyctaAllionia incarnatatrailing four o'clock4
91NyctaBoerhavia triquetra var. intermediafivewing spiderling2
92NyctaBoerhavia wrightiiWright's spiderling2
93NyctaMirabilis laevis var. retrorsaBigelow's desert four-o'clock1
94NyctaMirabilis laevis var. villosaBigelow's desert four-o'clock ~x
95NyctaMirabilis multiflora var. pubescensgiant four o'clock x
96OnagrChylismia brevipes ssp. brevipesgolden suncup417
97OnagrChylismia cardiophyllaheartleaf suncup1
98OnagrChylismia claviformis ssp. aurantiacabrown-eyed primrose14
99OnagrEremothera boothii ssp. condensataBooth's evening primrose34
100OnagrEremothera refractanarrow-leaf suncup34
101OnagrEulobus californicusCalifornia suncup x
102OnagrOenothera deltoides ssp. deltoidesdune primrose1
103PapavEschscholzia minutiflorasmall-flowered poppy21
104PapavEschscholzia parishiiParish's poppy14
105PhrymMimulus bigelovii var. bigeloviiBigelow's monkeyflower 2
106PlantAntirrhinum filipesdesert twining snapdragon 2
107PlantMohavea confertifloraghost flower1
108PlantPlantago ovatadesert plantain19
109PolemEriastrum eremicum ssp. eremicumdesert woolly-star ~x
110PolemLangloisia setosissima ssp. setosissimabristly langloisia1
111PolemLinanthus jonesiiJones' linanthus11
112PolemLoeseliastrum matthewsiidesert calico 2
113PolygChorizanthe brevicornu var. brevicornubrittle spineflower 1
114PolygChorizanthe rigidadevil's spineflower1
115PolygEriogonum inflatumdesert trumpet 3
116PolygEriogonum maculatumspotted buckwheat1
117PolygEriogonum thomasiiThomas' buckwheat3
118PolygPterostegia drymarioidesfairy bowties, threadstem 1
119RubiaGalium stellatumstar-flowered bedstraw1
120SimmoSimmondsia chinensisjojoba42
121SolanDatura wrightiisacred datura1
122SolanLycium andersoniiAnderson's boxthorn ~x
123SolanNicotiana obtusifoliadesert tobacco1
124SolanPhysalis crassifoliathick-leaved ground cherry11
125ViscaPhoradendron californicumdesert mistletoe22
126ZygopFagonia laevisCalifornia fagonia39
127ZygopKallstroemia californicaCalifornia caltrop2
128ZygopLarrea tridentatacreosote bush 16
129ZygopTribulus terrestris*puncture-vine1
130PoaceBouteloua aristidoides var. aristidoidesneedle grama2
131PoaceBouteloua barbata var. barbatasix-weeks grama1
132PoaceSchismus barbatus*Mediterranean schismus15

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

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Copyright © 2020 by Tom Chester, Nancy Accola and Joe Woods.
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: 20 January 2020