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Equisetaceae Habit: Perennial herb from rhizome. Stem: annual to perennial herb, generally erect, of 2 kinds (sterile, fertile) or not; internodes with lengthwise alternating ridges and grooves, hollow except at nodes, branches 0 or whorled, alternate leaves. Leaf: 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, spheric, green, unmarked, with 4 strap-like appendages. Genera In Family: 1 genus, 15 species: worldwide except Australia, New Zealand. Jepson eFlora Author: Robert E. Preston & Richard L. Hauke Reference: Hauke 1993 FNANM 2:76--84 Scientific Editor: Alan R. Smith, Thomas J. Rosatti. Index of California Plant Names (ICPN; linked via the Jepson Online Interchange) Previous taxon: Polystichum scopulinum Next taxon: Equisetum |