Echinocereus enneacanthus
Between Lajitas and Presidio, 
SW Texas, Nov 1978

Echinocereus enneacanthus
Big Bend National Park,TX,
Spjut & Marin 14466; Sep 2001

Echinocereus engelmannii
Mojave Desert, CA
Apr 1973

Echinocereus mojavensis
Mojave Desert, CA
Apr 1973

Echinocereus mojavensis
Southern Utah, west of Bryce Canyon, Dixie Natl. Forest, May 2008.
Photos by Susan Spjut