Plants unbranched or sometimes 12-branched. Stems erect, cylindric or short cylindric, 7.5-30(-40) × (2.5-)4-10 cm; ribs 10-19, slightly undulate; areoles 1-6(-10) mm apart. Spines 15-36 per areole, white to tan, dull pink, dark brown, or purplish black, central spines and spine tips often darker; radial spines 12-36 per areole, straight to slightly curved, appressed, pectinately arranged or nearly so, 2-8(-25) mm; central spines 0-7 per areole, terete, 1-6(-15) mm. Flowers 4.5-8(-12) × 5-10(-12) cm; flower tube 22-40 × 10-30 mm; flower tube hairs 5-15 mm; inner tepals silvery pink to magenta, usually white, crimson, green, or multicolored proximally, 23-40 × 5-15 mm, tips relatively thin, delicate; anthers yellow; nectar chamber 2-5 mm. Fruits green, olive green, or dark green, 15-28 mm, pulp white. 2n = 22.
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