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Key to families | Table of families and genera
Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.
Generally erect to ascending, [sprawling, pendent, or decumbent], branched or not, branches generally few–500, occasionally in dense mounds. Stem: 5–60 cm, (1)4–15 cm diam, spheric to long-cylindric, soft, not regularly segmented; ribs prominent, 4–13, tubercles ± 0 along rib-crests. Spines: 4–55 per areole, < 2 mm diam, needle- to dagger-like, glabrous to puberulent, straight, curved, or curly; central spines (0)1–6(9). Flower: lateral, near distal margin of spine cluster; perianth purple to lavender, orange, or red [yellow or green]; ovary glabrous, spiny, scales minute. Fruit: spheric to obovoid, indehiscent or splitting laterally, densely spiny, spine clusters deciduous. Seed: 0.8–2 mm, obovoid to ± spheric, dull, wrinkled or tubercled, generally black.
49 species: southwestern United States, Mexico. (Greek: hedgehog + Cereus) [Taylor 1985 The Genus Echinocereus. Timber Press]
1. Perianth ± purple to lavender, inner perianth parts generally acuminate to bristle-tipped; anthers yellow; spines glabrous, at least 1 central spine generally angular to flat ..... E. engelmannii
1' Perianth orange to red, inner perianth parts round to notched; anthers pink to purple; spines < 1 year old minutely puberulent especially near tip, all ± angular ..... E. mojavensis
Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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