|Jepson Flora Project: Jepson Interchange|
|TREATMENT FROM THE JEPSON MANUAL (1993)||
previous taxon |
Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit the Jepson eFlora.
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 30:385455]
Etymology: (Latin: horse, bristle, from roots of E. fluviatile L.)
Stems annual, of 2 kinds
Sterile stem 30100 cm, light green; basal internode of branch < subtending sheath; sheath 718 mm, ± as long as wide, teeth 1428, 410 mm; branch with 45 grooved ridges, solid
Fertile stem 1745 cm, unbranched, fleshy, brown, ephemeral; sheath 1.54 cm, > that of sterile stem, teeth 2030, 516 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 invasive
Horticultural 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).|