Equisetum fluviatile

Linnaeus

Sp. Pl. 2: 1062. 1753.

Common names: River horsetail pipes prêle fluviatile
Synonyms: Equisetum limosum Linnaeus
Treatment appears in FNA Volume 2.

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

V2 427-distribution-map.gif

St. Pierre and Miquelon, Alta., B.C., Man., N.B., Nfld. and Labr. (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.

Lower Taxa

None.
... more about "Equisetum fluviatile"
Richard L. Hauke +
Linnaeus +
Undefined subg. Hippochaete +
few +  and lacking +
River horsetail +, pipes +  and prêle fluviatile +
pointed +
0.3 cm3 mm <br />0.003 m <br /> (10 cm100 mm <br />0.1 m <br />) +
St. Pierre and Miquelon +, Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. (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 +  and Japan +
0–1500 m +
male +  and unisexual +
smaller than female +
Standing in water, in ponds, ditches, marshes, swales +
distinct +
Cones maturing in summer. +
4 +  and 6 +
squarish +
4mm;10mm +
branched +, unbranched +  and monomorphic +
persisting +
35 cm350 mm <br />0.35 m <br /> (115 cm1,150 mm <br />1.15 m <br />) +
Equisetum limosum +
Equisetum fluviatile +
Equisetum subg. Hippochaete +
species +
toothlike +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +