LEAVES: green and nearly glabrous on upper surface, paler green and white-tomentose beneath; margins slightly revolute, serrate to entire. NOTES: See also parent taxon. Chaparral, coniferous woodlands, riparian: Apache, Coconino, Cochise, Gila, Graham, Maricopa, Mohave, Navajo, Pima, Pinal, Santa Cruz, Yavapai cos.; 762-2545 m (2500-8350 ft); May-Sep; NV, CA, NM. Frangula ×blumeri (Greene) Kartesz & Gandhi (pro sp.) [= F. betulifolia × californica] was based upon type material collected from the Chiricahua Mountains (Blumer 1290, in part). It was thought to be a hybrid between this variety and F. betulifolia. All AZ specimens examined for this treatment from the Chiricahua Mountains fit well into F. californica subsp. ursina and do not appear to be hybrids.