Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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James R. Griffin

Shrub or tree-like, densely branched, generally dioecious
Stem generally erect, < 2 m, jointed; node conspicuous, internode > leaf; bark with irregular, longitudinal cracks, generally gray; twigs whorled, grooved, greenish and photosynthetic when young, glaucous, glabrous to scabrous, sometimes thorn-like
Leaves 2–3 per node, not green; bases ± fused into sheath, thickening with age; tips often ± deciduous
Pollen cones 1–5 per node, generally short-stalked, generally spheric; bracts generally flexible, lower sterile, upper subtending 2–8 stamen-like structures
Seed cones generally 1–3 per node, sessile or stalk < 5 mm; bracts generally flexible, lower sterile, upper enclosing 1–3 seeds
Seed spheric to cylindric, smooth or furrowed, generally angled at top, generally brown
Genera in family: 1 genus, 42 species: North America, South America, Medit, Asia
Reference: [Cutler 1939 Ann Mo Bot Gar 26:373–424]



Etymology: (Greek: Equisetum , for resemblance to those plants)


E. viridis Coville


Stem < 1.5 m; twig bright green to yellow-green when young, aging yellow, tip not thorn-like
Leaves generally 2 per node, < 6 mm; bases thickened, persistent, brown
Pollen cones 2–5 per node, 5–7 mm
Seed cones 2–6 per node, 6–10 mm, obovoid, sessile or stalk < 5 mm
Seeds 2, 5–8 mm, 3-angled, smooth
Chromosomes: 2n=14
Ecology: Sagebrush scrub, creosote-bush scrub, pinyon/juniper woodland
Elevation: 900–2300 m.
Bioregional distribution: s Sierra Nevada Foothills, Tehachapi Mountain Area, San Joaquin Valley, South Coast Ranges, Western Transverse Ranges, Great Basin Floristic Province, Desert Mountains
Distribution outside California: to Colorado
Synonyms: E. nevadensis var. v. (Coville) M.E. Jones
Horticultural information: DRN, DRY, SUN: 1, 2, 3, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24.

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bioregional map for EPHEDRA%20viridis being generated
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Ephedra viridis
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