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CACTACEAE CACTUS FAMILY

Bruce D. Parfitt, except as noted

Perennial herb, shrub, tree, generally fleshy. Stem: cylindric to spheric, or flat; surface smooth, tubercled, or ribbed (grooved); nodal areoles bearing flowers. Leaf: generally 0 or early-deciduous, flat to ± cylindric. Spines: areoles generally with central, radial spines, occasionally with glochids. Flower: generally 1 per areole, bisexual [unisexual], sessile, radial [bilateral]; perianth parts generally many [5], scale-like to petal-like; stamens many; ovary inferior [superior], style 1, stigma lobes generally several [many]. Fruit: dry to fleshy or juicy, indehiscent to variously dehiscent, spiny, scaly, or naked; tubercled or smooth. Seed: generally many, occasionally 0–few.
± 125 genera, ± 1800 species: America (especially deserts), Africa; many cultivated, some edible. [Parfitt & Gibson 2004 FNANM 4:92–257] Spines smaller, fewer (0) in shade forms; yellow spines blacken in age. Introduced species increasingly escape cultivation. Hybridization common in some genera. Taxa of Escobaria in TJM (1993) moved to Coryphantha. —Scientific Editors: Bruce D. Parfitt, Douglas H. Goldman, Bruce G. Baldwin.
Unabridged references: [Hunt 2006 The New Cactus Lexicon, DH Books, Milborne Port, England]

Key to Cactaceae

ECHINOCEREUS HEDGEHOG CACTUS
Generally erect to ascending, [sprawling, pendent, or decumbent], branched or not, branches generally few–500, occasionally in dense mounds. Stem: [2]5–60[200] cm, (1)4–15 cm diam, spheric to long-cylindric, soft, not regularly segmented; ribs prominent, 4–13[26], tubercles ± 0 along rib-crests. Spines: [0]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]

Key to Echinocereus

E. mojavensis (Engelm. & J.M. Bigelow) Rümpler
NATIVE
Plant generally forming dense mounds to 1 m diam. Stem: 1–500, 5–40 cm, 5–15 cm diam, ± spheric to cylindric; ribs 5–12; tubercles ± prominent on ribs. Spines: 3–11 per areole, highly variable, generally gray; central spines (0)1–6, similar to radial spines, generally curved or curly and twisted. Flower: narrowly funnel-shaped. Fruit: 20–25 mm, spines minutely puberulent.
2n=22. Dry habitats; 150–3000 m. White and Inyo Mountains, Desert; to Utah, Arizona. [Echinocereus triglochidiatus Engelm.] Apr–Jun [Online Interchange]
Unabridged synonyms: [Echinocereus triglochidiatus Engelm. var. mojavensis (Engelm. & J.M. Bigelow) L.D. Benson]

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Oct 25 2014
Citation for this treatment: [Author of taxon treatment] 2013. Echinocereus, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=23787, accessed on Oct 25 2014

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click for enlargement Echinocereus mojavensis
See CalPhotos for additional images
2008 Gary A. Monroe

Geographic subdivisions indicated for the distribution of Echinocereus mojavensis Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.