Mexico, Baja California, Cultivated at Desert Botanical Garden Maricopa Co., Phoenix, AZ. 33 degrees 27' 33'' N, 111 degrees 56' 35'' W. elevation 1100 ft; accession number 1982 0039 0101, plant originally collected by Howard S. Gentry 23287 from Mexico: Baja California Norte, ca 2-3 miles (3-5 km) southeast of Agua Caliente, on east plain of Sierra san Pedro Martir, 12 June 1973, with Lyle McGill, same date as 1991 0471 01, from same clone as holotype.
30.660516 -115.162359 +-5000m.
Leaves dark green-glaucous with maroon tinge, strongly guttered, thick at base; ovary, neck dark chartreuse, open, tepals yellow flushed with light chartreuse, flaring, thickish, 40 mm across, style yellow, filaments, anthers, yellow; measurements in mm following Gentry (1982), anthesis: tl=61, o=33x9.25, n=5.75, tu=3x21. Fi ins=3, tep=21x12, fil=45, sty=54, a=9 (curved)