S2

Imperiled 

University of New Mexico Herbarium at www.msb.unm.edu/herbarium (2005)

Escobaria sandbergii (Sandberg's Pincushion Cactus)

Stems solitary, few in a clump, or commonly branched to form small dense clusters of 20 or more stems, the individual stems mostly 2-4 cm thick, to 15 cm tall; tubercles on mature stems with upper surface grooved; spines about 20-60 per areole, sprea...