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Echinocereus engelmannii

Higher Taxonomy
Family: CactaceaeView DescriptionDichotomous Key

Habit: 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.
Genera In Family: +- 125 genera, +- 1800 species: America (especially deserts), Africa; many cultivated, some edible. Note: 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.
eFlora Treatment Author: Bruce D. Parfitt, except as noted
Scientific Editor: Bruce D. Parfitt, Douglas H. Goldman, Bruce G. Baldwin, Thomas J. Rosatti.
Genus: EchinocereusView DescriptionDichotomous Key

Habit: 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.
Species In Genus: 49 species: southwestern United States, Mexico. Etymology: (Greek: hedgehog + Cereus)

Echinocereus engelmannii (Parry ex Engelm.) Lem.
Habit: Clump-forming or loose, open mounds generally < 0.7 m diam. Stem: < 60, 5--45(70) cm, 4--9 cm diam, cylindric; ribs 10--13; tubercles +- 0. Spines: (8)15--20 per areole, color and shape variable; central spines 2--7, straight to twisted. Flower: short-funnel- to bell-shaped. Fruit: 20--30 mm, spines glabrous. Chromosomes: 2n=44.
Ecology: Dry habitats; Elevation: < 2400 m. Bioregional Distribution: SnBr, PR, W&I, D; Distribution Outside California: to Utah, Arizona, Mexico. Flowering Time: May--Jun Note: Highly variable; occasionally unclearly divided into varieties. N eeds study.
Synonyms: Echinocereus munzii (Parish) L.D. Benson; Echinocereus engelmannii var. munzii (Parish) Pierce & Fosberg
eFlora Treatment Author: Bruce D. Parfitt
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botanical illustration including Echinocereus engelmannii


Citation for this treatment: Bruce D. Parfitt 2016. Echinocereus engelmannii, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on May 01, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on May 01, 2016.

Echinocereus engelmannii
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© 1998 Larry Blakely
Echinocereus engelmannii
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© 2013 Neal Kramer
Echinocereus engelmannii
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© 2009 California Academy of Sciences
Echinocereus engelmannii
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© 2009 Keir Morse
Echinocereus engelmannii
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© 2012 Keir Morse
Echinocereus engelmannii var. acicularis
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© 2015 Barry Rice

More photos of Echinocereus engelmannii in CalPhotos

Geographic subdivisions for Echinocereus engelmannii:
SnBr, PR, W&I, D;
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.
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.