TREATMENT FROM THE JEPSON MANUAL (1993) |
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Jepson Interchange (more information) |
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©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit the Jepson eFlora. |
AND IS MAINTAINED FOR ARCHIVAL PURPOSES ONLY |
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 23 per node, not green; bases ± fused into sheath, thickening with age; tips often ± deciduous
Pollen cones 15 per node, generally short-stalked, generally spheric; bracts generally flexible, lower sterile, upper subtending 28 stamen-like structures
Seed cones generally 13 per node, sessile or stalk < 5 mm; bracts generally flexible, lower sterile, upper enclosing 13 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 26:373424]
Etymology: (Greek: Equisetum , for resemblance to those plants)
Native |
Stem generally low or prostrate, < 1 m; branch ± flexible; twig pale green when young, aging yellow, tip not thorn-like
Leaves 2 per node, < 3 mm, persistent; bases slightly thickened, whitish
Pollen cones generally 23 per node, < 8 mm
Seed cones 613 mm, sessile or short-stalked
Seed generally 1, 613 mm, obovoid-ellipsoid, furrowed
Ecology: Creosote-bush scrub
Elevation: < 1500 m.
Bioregional distribution: Desert
Distribution outside California: to Arizona, s Utah
Native |
Seed cone 613 mm, elliptic
Seed 813 mm
Ecology:
Elevation:
Bioregional distribution: Desert
Distribution outside California: to Arizona
Horticultural information: TRY.