Stems unbranched, cylindric or obconic cylindric, 2-7.5(-8) × 1.2-2.5 cm; ribs not evident, tubercles prominent. Spines dense, obscuring stems; radial spines 5-10 per areole, white, straight, flat, (2-)3-5 × 0.3-0.6 mm; central spines 1(-4) per areole; abaxial central spine 1 per areole, whitish to tan or gray, straight, wavy, twisting, or curling, flat, flexible, papery, with obscure adaxial midrib, sometimes pointing upward and obscuring apex of plant, lacking hook, 15-45(-50) × 1-1.5 mm; lateral or adaxial central spines 0(-3) per areole, white to tan, (3-)20-40 × 0.5-1 mm. Flowers funnelform to narrowly campanulate, 2-2.5 × 1-2.5 cm; outer tepals with green-purple to red-brown midstripes and cream to white margins, cuneate-spatulate, usually 9-20 × 1-3 mm, finely toothed; inner tepals white with brown midstripes, largest tepals oblanceolate, 15-20 × 3.5-4.5 mm, apex acute to mucronate; filaments white to greenish yellow; anthers cream to pale yellow. Fruits indehiscent or irregularly dehiscent, green, subspheric, 4-6 × 3-5 mm, dry at maturity; scales few or none. Seeds black, 2.5-3 × 2-2.5 mm, shiny; testa with fine, rounded papillae.
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