Pediocactus simpsonii

Family: Cactaceae
Common Name: mountain ball cactus
Symbol: PESI
Description: Stems depressed-ovoid to ovoid or globose, 2.5-15 - 2.5-15 cm; areoles circular to oval, villous. Spines smooth, relatively hard, distinguishable as radial and central; radial spines widely spreading, white, slender, 3-13 mm; central spines dark and reddish with basal 1/2 cream or yellow, rigid, straight or slightly curved, 5-21 - 0.3 mm. Pinyon-juniper woodlands, sagebrush, montane, and prairie grasslands, coniferous forests; 1400-3500 m