Arizona State University Vascular Plant Herbarium (ASU:Plants)
ASU0091010
696bdc67-ca78-498c-a3d8-36ceec30c426
185064
Echinocactus polycephalus Engelm. & Bigelow
Cactaceae
Michael Chamberland
60
1990-03-18
USA, Arizona, Mohave County, Vicinity of Lake Mead; west of triple intersection of Gregg's Hideout Road, Triple Bar Back Road, and Hualapai Wash Road; west of the base of the elevational rise to Grapevine Mesa
35.9162 -114.166 +-700m.
TRS: T29N R18W S12
700 meters (2296ft)
Rocky, hilly area
Larrea, Opuntia basilaris, O. erinacea, Ferocactus cylindraceus, Yucca
Determiner: Intermediate between E. polycephalus var. polycephalus and var. xeranthemoides; see boxed specimens; seeds and hypanthium scales intermediate between var. polycephalus and var. xeranthemoides; 5 heads to the clump; largest head 10 inches in diameter including spines; clump 23 inches in diameter including spines; number of ribs per head on following sides of clump: N:13, S:15, E:14, W:13, Center:13