Stems unbranched or branched near base, depressed-spheric, spheric, cylindric, or elongate-cylindric, 4.5-45 × 3.5-14.5 cm; ribs (10-)13(-16), tubercles evident on ribs. Spines frequently obscuring stems; radial spines 8-17 per areole, usually white, sometimes brown or purplish pink, 6-36 mm; central spines (3-)4-6(-8) per areole, 1-5 hooked; abaxial central spine usually purple black, hooked, 15-72 × 0.6-1 mm; lateral spines 2-6 per areole, similar to abaxial, usually shorter, usually not hooked; adaxial central spine usually white (rarely gray, straw colored, pink, or reddish brown), flat to angled or terete; straight (rarely contorted), 17-82(-90) × 0.7-1.5(-3) mm. Flowers funnelform to campanulate, (2-)3-5.7(-7) × 2.5-5.5(-8) cm; outer tepals with greenish or brownish purple midstripes and rose to purple, pink, yellow, or white margins, oblanceolate, 25-50 × 6-10 mm, mucronate, margins entire; inner tepals rose to purple, pink, or yellow (rarely white), oblanceolate, 15-55 × 6-12 mm, margins entire to fringed, apex mucronate; filaments purple, yellow, or green; anthers yellow; ovary papillate, appearing granular. Fruits irregularly dehiscent, green turning reddish pink, 10-30 × 10-15 mm; scales few, membranous fringed. Seeds dark brown to black, 2.5-3.5 × 1.5-3 mm; testa with rounded papillae.
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