Collected
18 February 1992.
Sonora, Mexico
Locality: Road to summit of Cerro el Vigia, ca. 2 mi. up the "microondas" service road which begins by the airport, N of Guaymas.
Environment description: Gulf Coast Subdivision Sonoran Desertscrub with Acacia willardiana, Bursera microphylla, Coursetia glandulosa, Stenocereus thurberi.