Stems usually unbranched (occasionally 2-3-branched), usually pale green, depressed-spheric to ovoid, usually 3.2-11(-18) × 3.8-8(-10) cm, somewhat glaucous; ribs 13-17, tubercles inconspicuous. Spines not obscuring stem, usually only radial; radial spines 7-14 per areole, spreading, straw colored, 6-13 mm, less than 1 mm diam.; central spines 0(-4) per areole (very rarely 1 abaxial central spine per areole hooked, 7-15 mm, brown). Flowers funnelform to campanulate, 1-3.5 × 1-3 cm; outer tepals with purple midstripes and cream or gold (rarely pink) margins, oblanceolate, 10-25 × 5-8 mm; inner tepals yellow to cream (rarely pink), oblanceolate, 15-30 × 5 mm; filaments pale yellow or white; anthers yellow. Fruits indehiscent to irregularly dehiscent, green, becoming tan at maturity, short cylindric, (4-)8-10 × 7-9 mm. Seeds black, 2.5-3 × 3-4 mm; testa cells convex but somewhat flattened apically.
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