Difference between revisions of "Equisetum fluviatile"
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|genus=Equisetum | |genus=Equisetum | ||
|subgenus=Equisetum subg. Hippochaete | |subgenus=Equisetum subg. Hippochaete | ||
Revision as of 15:48, 18 September 2019
Aerial stems monomorphic, green, unbranched or branched, 35–115 cm; hollow center large, to 9/10 stem diam.; vallecular canals absent. Sheaths squarish in face view, ca. 4–10 × 4–10 mm; teeth black, occasionally with narrow white border, 12–24, narrow, 2–3 mm. Branches when present only from midstem nodes, spreading, hollow, ridges 4–6, valleys rounded; 1st internode of each branch shorter than subtending stem sheath; sheath teeth narrow. 2n =216.
Phenology: Cones maturing in summer.
Habitat: Standing in water, in ponds, ditches, marshes, swales
Elevation: 0–1500 m
Distribution
St. Pierre and Miquelon, Alta., B.C., Man., N.B., Nfld., N.W.T., N.S., Ont., P.E.I., Que., Sask., Yukon, Alaska including the Aleutian Islands, Conn., Del., D.C., Idaho, Ill., Ind., Iowa, Maine, Md., Mass., Mich., Minn., Mont., Nebr., N.H., N.J., N.Y., N.Dak., Ohio, Oreg., Pa., R.I., S.Dak., Vt., Va., Wash., W.Va., Wis., Wyo., Eurasia s to n Italy, China, Korea, Japan.
Discussion
Selected References
None.