Equisetum sylvaticum

Linnaeus

Sp. Pl. 2: 1061. 1753.

Common names: Wood horsetail prêle des bois
Treatment appears in FNA Volume 2.

Aerial stems dimorphic; vegetative stems brownish to green, branched, 25–70 cm; hollow center 1/6–1/3 stem diam. Sheaths squarish in face view, 3–6 × 2.5–6 mm; teeth reddish, 8–18, papery, 3–10 mm, coherent in 3–4 large groups. Branches in regular whorls, delicate, arching, branched, solid; ridges 3–4; valleys channeled; 1st internode of each branch longer than subtending stem sheath; sheath teeth attenuate. Fertile stems brown, with stomates, initially unbranched, persisting and becoming branched and green after spore discharge. 2n =216.


Phenology: Cones maturing in late spring.
Habitat: Moist forests
Elevation: 0–2800 m

Distribution

V2 639-distribution-map.gif

Greenland, 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, Conn., Del., Idaho, Iowa, Maine, Md., Mass., Mich., Minn., N.H., N.J., N.Y., N.Dak., Ohio, Pa., R.I., S.Dak., Vt., Va., Wash., W.Va., Wis., Europe, n Asia to ne China, Japan in Hokkaido

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Equisetum sylvaticum"
Richard L. Hauke +
Linnaeus +
Undefined subg. Hippochaete +
solid +  and branched +
few +  and lacking +
Wood horsetail +  and prêle des bois +
pointed +
0.3 cm3 mm <br />0.003 m <br /> (10 cm100 mm <br />0.1 m <br />) +
Greenland +, 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 +, Conn. +, Del. +, Idaho +, Iowa +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, N.H. +, N.J. +, N.Y. +, N.Dak. +, Ohio +, Pa. +, R.I. +, S.Dak. +, Vt. +, Va. +, Wash. +, W.Va. +, Wis. +, Europe +, n Asia to ne China +  and Japan in Hokkaido +
0–2800 m +
male +  and unisexual +
smaller than female +
Moist forests +
distinct +
Cones maturing in late spring. +
3 +  and 4 +
squarish +
2.5mm;6mm +
branched +  and unbranched +
green +, brown +  and brownish +
persisting +
fertile +  and vegetative +
25 cm250 mm <br />0.25 m <br /> (70 cm700 mm <br />0.7 m <br />) +
Equisetum sylvaticum +
Equisetum subg. Hippochaete +
species +
toothlike +
coherent +
0.3 cm3 mm <br />0.003 m <br /> (1 cm10 mm <br />0.01 m <br />) +
channeled +