Key to Sclerocactus

View taxon page for Sclerocactus

(For a list of species in Sclerocactus, use the above link.)

Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.

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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Citation for the whole project: Jepson Flora Project (eds.) . Jepson eFlora, https://ucjeps.berkeley.edu/eflora/ [accessed on ]

Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on .

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