United States, California, Imperial, Sonoran (Colorado) Desert: Chocolate Mountains, Mammoth Wash area on dirt road toward Hayden Well from Ted Kipf Rd., 4.18 km NE (68°) of Tortuga Siding on the railroad (Tortuga 7.5' Q.)
33.181517 -115.300283 +-100m.
33° 10.891' N 115° 18.017' W
122 meters
400ft.
Wash on sandy and gravelly alluvial slope
Larrea, Ambrosia salsola, Olneya, Parkinsonia florida, Encelia farinosa, etc.
Uncommon annual in sand accumulation at wash edge, under Olneya. Fls. whitish (faded, past anthesis).