The Pediocactus genus contains eight species, seven of which are rare plants native to the Colorado Plateau region of Utah, Colorado, New Mexico, and Arizona.

The name Pediocactus is derived from the Greek words pedinos, meaning plain/level and kaktos, meaning thistle. Pediocacti are native to the Great Plains region of the United States.

Seeds for pediocacti are sometimes available at:
Mesa Garden;
Cactus Heaven

Links to Information
Propagation by seed