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Ephedra nevadensis

Higher Taxonomy
Family: EphedraceaeView Description 

Habit: Shrub; generally dioecious; taproot deep. Stem: erect, prostrate, occasionally climbing, jointed, much branched, green in youth; branchlets opposite or whorled, cylindric, longitudinally grooved; pith brown or white. Leaf: simple, 2 (each pair at right angles to adjacent pairs) or 3 per node, scale-like, +- fused at base into membranous sheath, generally ephemeral; resin canals 0. Cone: axillary (terminal), sessile or not, 1--many per node, ovoid or ellipsoid. Pollen Cone: bracts 2--3 per node, proximal sterile, distal subtending 2 basally fused bractlets subtending a stalk with 2--10(15) sessile to stalked, anther-like parts with 2 apical pores. Seed Cone: stalk 1--11(50) mm, generally straight, naked or with reduced basal bracts; distal bracts in (2)4--10 pairs or whorls, free or fused, brown or green, scarious or fleshy, subtending 2 fused leathery bractlets enclosing 1 ovule. Seed: 1--3(4) per cone (in ×-section, +- round if 1, +- semicircular if 2, +- triangular if 3, etc.), +- spheric to ellipsoid or lance-ovoid, beaked or not.
Genera In Family: 1 genus, +- 50 species: arid, semi-arid (to tropical) regions of northern Africa, Asia, Europe, North America, South America.
eFlora Treatment Author: Stefanie M. Ickert-Bond
Scientific Editor: Thomas J. Rosatti.
Genus: EphedraView DescriptionDichotomous Key

Stem: spreading to generally erect, 0.3--2(4.5) m; uppermost bud generally conic, generally not thorn-like.
Etymology: (Greek: sitting upon, from jointed stems and/or ancient name for Equisetum, also with jointed stems)

Ephedra nevadensis S. Watson
Stem: 0.3--1.5 m; twig pale green, glaucous in youth, aging yellow to gray; pith brown. Leaf: 2--3 per node, 2--6(8) mm; base deciduous, gray, not swollen. Pollen Cone: 1--several per node, 3--5 (8) mm; bracts 2 per node. Seed Cone: 1--several per node, 5--11 mm, +- spheric, stalk 1--11(50) mm, naked; distal bracts 2 per node, broad-ovate, fused 1/5, scarious, center light brown to yellow-green, margins entire, yellow-translucent, stalk-like base 0. Seed: generally 2, 6--9 mm, generally 2 × as long as wide. Chromosomes: 2n=14,28.
Ecology: Creosote-bush scrub, Joshua-tree woodland; Elevation: < 1100 m. Bioregional Distribution: s SN, TR, SNE, D; Distribution Outside California: to Oregon, Utah, Arizona, Baja California. Note: Cones present Mar--Jun.
Synonyms: Ephedra nevadensis subvar. paucibracteata Stapf; Ephedra nevadensis f. rosea H.C. Cutler
eFlora Treatment Author: Stefanie M. Ickert-Bond
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botanical illustration including Ephedra nevadensis


Citation for this treatment: Stefanie M. Ickert-Bond 2016. Ephedra nevadensis, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on May 06, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on May 06, 2016.

Ephedra nevadensis
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© 2010 James M. Andre
Ephedra nevadensis
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© 2008 Steve Matson
Ephedra nevadensis
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© 2012 Neal Kramer
Ephedra nevadensis
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© 2012 Neal Kramer
Ephedra nevadensis
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© 2007 Steve Matson
Ephedra nevadensis
click for enlargement
© 2012 Neal Kramer

More photos of Ephedra nevadensis in CalPhotos

Geographic subdivisions for Ephedra nevadensis:
s SN, TR, SNE, 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.