Escobaria vivipara (Coryphantha vivipara var. bisbeeana) Spinystar
CACTUS.  A small cactus with multiple egg-shaped or spherical stems and dense spines.  Young plants have only a single stem, but old plants may have more than a dozen.  Radial spines are white. Central spines, 1-3 per areole, are white with brown tips and are horizontal or grow at various angles, but are never uniformly vertical.  Pink flowers bloom in late summer, a few days after the first significant rain.  Common throughout the Empires in a variety of habitats, often on ridgetops. Echinomastus erectocentrus var. erectocentrus has vertical purple central spines, paler flowers, blooms earlier, and rarely has more than 1 or 2 stems.  Mammillaria grahamii is more cylindrical, with strongly hooked central spines and much smaller flowers.
FAMILY:  Cactaceae (Cactus Family)