Cryptantha pterocarya (Torr.) Greene

One of the few readily-identifiable Cryptanthas, common in low rocky areas. The calyx is strongly inflated, and the nutlets winged.

Flowers near Signal Peak in the Gila Bend Mountains, Maricopa County, Arizona, 9 Mar 2008.

Nutlets in lower Bar Canyon, west side of the Organ Mountains, Doña Ana County, New Mexico, 29 Apr 2012.

Whole plant at Organ Pipe Cactus National Monument, Pima County, Arizona, 25 Feb 2005.

Flowers at Organ Pipe Cactus National Monument, 25 Feb 2005.

Inflorescence at Organ Pipe Cactus National Monument, 25 Feb 2005.