Publication: Cact. Succ. J. (Los Angeles) 12: 156, fig. 1940 Without Latin diagnosis
Description
Central spines 1-3, to 54 mm. long, subulate; radial spines 7-8; tubercles large, 16 mm. in diameter.
Origin and Habitat
San Bernardo and Guirocoba, Sonora (Mexico, Northern America)
Habitat and ecology: Foothills.
Bibliography
Major references and further lectures
- Howard Scott Gentry “Rio Mayo Plants: A Study of the Flora and Vegetation of the Valley of the Rio Mayo, Sonora” Carnegie Institution of Washington, page 195, 1942