|University of California, Berkeley|
|Jepson eFlora: Taxon page
Key to families | Table of families and genera
Index to accepted names and synonyms:
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|Family: Cactaceae||View Description||Dichotomous Key|
|Genus:||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Habit: Erect, branched [or not], forming compact, +- 1 m diam mounds; branches 30--50(130). Stem: not segmented, 15--40 cm, 15--30 cm diam, flat-topped spheric to short-cylindric, hard, tip densely woolly [to glabrous]; ribs 11--25[60+], prominent, tubercles indistinct. Spines: (5)10--19 per areole, generally 2--5 mm diam near base, generally awl-shaped, generally flat, ringed with conspicuous ridges, straight to curved; central spines 4 per areole. Flower: at stem tip, near distal edge of spine cluster, 4--5 cm diam; perianth yellow tinged with pink; ovary densely long-woolly, spines 0, scaly, distal scales long-tapered, tips spine-like. Fruit: dehiscent via basal pore, ovoid, densely woolly, spineless, but distal scales spine-like at tip. Seed: 2.8--4.7 mm, spheric, or +- reniform to obovoid, shiny or dull, +- red-brown to black.
Species In Genus: 6 species: southwestern United States, Mexico. Etymology: (Greek: spine + cactus)
eFlora Treatment Author: Bruce D. Parfitt
Jepson Online Interchange
Previous taxon: Cylindropuntia wolfii
Next taxon: Echinocactus polycephalus var. polycephalus
Citation for this treatment: Bruce D. Parfitt 2017. Echinocactus, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=9219, accessed on March 24, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on March 24, 2017.