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Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
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.
1 genus, ± 50 species: arid, semi-arid (to tropical) regions of n Africa, Asia, Eur, North America, South America. [Ickert-Bond 2003 Ph.D. Dissertation Arizona State Univ] —Scientific Editor: Thomas J. Rosatti.
Unabridged references: [Cutler 1939 Ann Missouri Bot Gard 57:373–428; Ickert-Bond 2003. Systematics of New World Ephedra L. (Ephedraceae): Integrating morphological and molecular data. Ph.D. Dissertation, Arizona State Univ, Tempe, Arizona, 363 pp; Stapf, O. 1889. Die Arten der Gattung Ephedra. Denkschrift der Kaiserlichen Akademie der Wissenschaften, Mathematisch-Naturwissenschaftliche Klasse 56:1–112]
Key to Ephedra
Stem: spreading to generally erect, 0.3–2(4.5) m; uppermost bud generally conic, generally not thorn-like. (Greek: sitting upon, from jointed stems and/or ancient name for Equisetum, also with jointed stems)
Climbing shrub, <= 5 m, or hanging ( prostrate).
Stem: twigs glabrous, gray-green, aging red-brown at first, later gray; uppermost bud elliptic; pith white.
Leaf: 2 per node, <= 2.5 mm, sheath base not swollen.
Pollen cone: 1–few per node, <= 5 mm; bracts 2 per node.
Seed cone: 1–several per node, 8–9 mm, narrow- cylindric before full maturity, stalk 2–10(20) mm, generally curved, naked; distal bracts 2 per node, round, fused >= 2/3, fleshy, red.
Seed: (1)2, 6–9 mm, generally > 2 × as long as wide, smooth.
2n=14 (acc. to older records also 12 and 28). Oak woodland; 600–750 m. South Coast;
Previous taxon: Ephedra californica
Next taxon: Ephedra funerea
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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Chart based on elevation range in Manual and elevations and coordinates of CCH records.
Data provided by the participants of the Consortium of California Herbaria.
Note: About half of the CCH records include both elevation and coordinates.
| Data provided by the participants of the Consortium of California Herbaria.
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