Plants typically branched. Stems depressed-ovoid to elongate-ovoid, 5-30 × 5-15 cm; areoles oval, villous. Spines smooth, hard and rigid, distinguishable as radial and central; radial spines 10-30 per areole, spreading at right angles to tubercles, nearly straight, white to dull reddish brown, 8-20 mm; central spines 6-12 per areole, widely spreading or nearly erect, reddish brown to nearly black, rigid, straight or slightly curved, base yellow or cream, 15-35 mm, less than 1 mm diam. at base. Flowers 1-3.5 × 2.5-5 cm; scales and outer tepals of flower tube minutely toothed, laciniate, or entire and undulate; outer tepals with greenish brown midstripes, oblong-cuneate, 12-25 × 4.5-9 mm; inner tepals white, pink, magenta, yellow, or yellow-green, 19-27 × 5-10 mm. Fruits green tinged with red, drying reddish brown, short cylindric, 6-11 × 5-10 mm. Seeds gray to black, 2-3 × 1.5-2 mm, papillate but not rugose.
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