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 |
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.)
Native |
Stems annual, of 2 kinds
Sterile stem 1060 cm, green; basal internode of branch > subtending sheath; sheath 38.5 mm, ± as long as wide, teeth 614, 1.5 3.5 mm, dark, often joined but not fused; branch with 34 rounded ridges, solid
Fertile stem 1132 cm, unbranched, fleshy, brown, ephemeral; sheath 511 mm, > that of sterile stem, teeth 610, 37.5 mm
Ecology: Moist, disturbed areas
Elevation: < 3000 m.
Bioregional distribution: California Floristic Province, Modoc Plateau, White and Inyo Mountains
Distribution outside California: N.America, Europe, Asia
Horticultural information: IRR: 1, 4, 5, 6, 7, 15, 16, 17, 24 &SHD: 2, 3, 8, 9, 14, 18, 19, 20, 21, 22, 23; INV.