A large Coryphantha with small tubercles and dense, delicate-looking spines.
Plants form multi-headed mounds.  Found on grassy, rocky slopes.
This cactus of Sonora, Mexico enters the U.S. only in southern Santa Cruz County, Arizona,
in the Tumacacori, Pajarito, and Atascosa Mountains.

Federal Threatened & Endangered Species status:
Listing denied due to lack of information.
U.S. Forest Service status:  Sensitive Species
Arizona Department of Agriculture status:  HIGHLY SAFEGUARDED
THREATS: Grazing, powerline construction, offroad vehicle use, collection.
STEREOPHOTO Anaglyph
Arizona Rare Cactus Photos