Mexico, Baja California, From Ojos Negros to Tecate, 3.6 mi. N of road to San Juan de Dios, Sierra Pinal.
32.5672 -116.625
Granitic hills along road; among regenerating Quercus agrifolia, in decomposed granite soil in an area swept by fire 1-2 years previously; associated with Descurainia obtusa subsp. Adenophora, Phacelia fremontii, Gilia stellata, Chaenactis tenuifolia, Oenothera micrantha, etc.