Stems usually unbranched, cylindric to elongate cylindric, 3-12(-28) × 4-9 cm; ribs (8-)12-13(-15), tubercles evident on ribs. Spines slightly or not at all obscuring stems; radial spines (2-)6-8(-12) per areole, white, 0-17 mm; central spines 1-3(-5) per areole, sometimes not greatly different from radial spines; abaxial central spines 0-2 per areole, brown, reddish brown to black, straight (rarely curved or hooked), 12-26 × 0.8-1 mm; lateral central spines 2-4 per areole, similar to abaxial; adaxial central spine 1 per areole, usually white (rarely light brown), elliptic in cross section, 15-31 × 0.5-1.8 mm. Flowers fragrant, funnelform (rarely campanulate), 3-5(-6) × (3-)4-5 cm; outer tepals with greenish lavender midstripes and pink margins, oblanceolate, 25-30 × 4-6 mm; inner tepals pink (rarely pale pink), oblanceolate to lanceolate, 24-30(-35) × 4-6 mm; filaments green to white; anthers yellow. Fruits not regularly dehiscent, ovoid, barrel-shaped, 9-22(-30) × 8-12 mm, dry, with a few membranous scales, mostly near the apex. Seeds black, 1.5 × 2.5 mm; testa with rounded papillae.
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