Plants only occasionally branched. Stems depressed-ovoid to ovoid or globose, 2.5-15(-25) × 2.5-15 cm; areoles circular to oval, villous. Spines smooth, relatively hard, distinguishable as radial and central; radial spines 15-35 per areole, widely spreading, white, slender, 3-13 mm; central spines 4-11 per areole, reddish brown (rarely black) with basal 1/2 cream or yellow, rigid, straight or slightly curved, 5-21 × 0.3 mm. Flowers 1.2-3 × 1-2.5 cm; scales and outer tepals minutely toothed and laciniate or entire and often undulate; outer tepals with greenish brown midstripes, oblong-cuneate, 9-20 × 3-5(-6) mm; inner tepals white, pink, magenta, yellow, or yellow-green, 12-25 × 4.5-6(-9) 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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