Algodones Dunes is a large 45-mile long sand dune field located in the southwestern part of California near the Arizona border. To the east are the Chocolate Mountains. The dunes were apparently created by wind-blown sands from the ancient Lake Cahuilla. An upside-down V symbol next to the common name indicates a taxon that was new to me when I photographed it on this field trip.

Rush milkweed
Asclepias subulata
Asclepiadaceae

Fanleaf crinklemat
Tiquilia plicata
Boraginaceae

Honeysweet
Tidestromia oblongifolia
Amaranthaceae

Algodones Dunes sunflower
Helianthus niveus ssp. tephrodes
Asteraceae

Desert sand verbena
Abronia villosa var. villosa
Nyctaginaceae

Desert marigold
Baileya multiradiata var. multiradiata
Asteraceae

Emory indigo bush
Psorothamnus emoryi
Fabaceae

Coulter's globemallow ^
Sphaeralcea coulteri
Malvaceae

Sand food ^
Pholisma sonorae
Lennoaceae

Giant Spanish needles
Palafoxia arida var. gigantea
Asteraceae

Creosote bush
Larrea tridentata
Zygophyllaceae

Palo verde
Cercidium floridum ssp. floridum
Fabaceae

Dune buckwheat, Colorado Desert buckwheat ^
Eriogonum deserticola
Polygonaceae

Lax flower
Baileya pauciradiata
Asteraceae

Wiggins's croton ^
Croton wigginsii
Euphorbiaceae