Jepson eFlora
Key to families | Table of families and genera

Key to Sclerocactus

View taxon page for Sclerocactus

1. Central spines 4–8 per areole, all ± alike, robust, 1–1.5 mm wide at base, straight to curved but not hooked ..... S. johnsonii

1' Central spines 9–11 per areole, of 2 kinds, hooked spines 5–8 per areole, slender and flexible, 0.3–0.7 mm wide at base, distal-most spines 1–3 per areole, upright, straight, flat, ± white, 1–2.1 mm wide at base ..... S. polyancistrus


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