Jepson Interchange (more information)
Print edition is available from the University of California Press
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This page is based on the 1993 Jepson Manual.
Please see the Jepson eFlora for up-to-date information about California vascular plants. |
| Jepson Flora Project: Jepson Interchange |
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TREATMENT FROM THE JEPSON MANUAL |
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Jepson Interchange (more information) |
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©Copyright 1993 by the Regents of the University of California
Print edition is available from the University of California Press |
| The second edition of The Jepson Manual (2012) is available from the University of California Press | |
| See also the Jepson eFlora, which parallels the Second Edition |
Perennial from rhizome (above ground stem annual or perennial herb)
Stem generally erect, ridged lengthwise, hollow except at nodes, sometimes of 2 kinds (sterile, fertile); branches 0 or whorled and alternate leaves, sometimes solid
Leaves scale-like, whorled, fused into nodal sheath with as many teeth as leaves, generally not green
Sporangia several on inner surface of peltate scales that are clustered into a terminal cone; spores of 1 kind per sp., spheric, green, unmarked, with 4 strap-like appendages
Genera in family: 1 genus, 15 species: worldwide except Australia, New Zealand
Reference: [Hauke 1978 Nova Hedwigia 30:385–455]
Etymology: (Latin: horse, bristle, from roots of E. fluviatile L.)
| Native |
Stems annual, of 2 kinds
Sterile stem 30–100 cm, light green; basal internode of branch < subtending sheath; sheath 7–18 mm, ± as long as wide, teeth 14–28, 4–10 mm; branch with 4–5 grooved ridges, solid
Fertile stem 17–45 cm, unbranched, fleshy, brown, ephemeral; sheath 1.5–4 cm, > that of sterile stem, teeth 20–30, 5–16 mm
Ecology: Streambanks, roadside ditches, seepage areas
Elevation: < 1000 m.
Bioregional distribution: Northwestern California, Central Western California, Southwestern California
Distribution outside California: along coast to British Columbia
(other subsp. in Eur, Asia). Sometimes invasiveHorticultural information: WET: 1, 4, 5, 6, 15, 16, 17, 24 &SHD: 2, 3, 7, 8, 9, 14, 18, 19, 20, 21, 22, 23; INV; STBL.
| 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). |
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