Name: Epithelantha refers to the flower position near the apex of the tubercles.
English: Button cactus.
Region: northeastern Mexico,Texas to Arizona.
Genus: 2 species, Epithelantha bokei.
Botany: very small; stems globe-shaped or cylindrical, 2 cm wide; spines tiny, whitish, cover the stem completely; flowers tiny, on the tip of the stem; fruits bright red, edible.