Escobaria vivipara (Coryphantha vivipara var. bisbeeana)
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)