Mexico, Los Mezquites; Sierra de la Giganta; Arroyo Carrizal, E of Rancho El Horno, NE of San Xavier
25.8833 -111.517
Lat. 25°53' Long. [-]111°31'
At edge of stream, with Lysiloma candida, Mimosa purpurascens, Jatropha cinerea, Bursera Microphylla, Pachycerreus Pringlei, Lemaireocereus Thurberi, and Ruellia peninsularis; dry, rocky, broad bed of arroyo