Equisetum pratense

Ehrhart

Hannover. Mag. 22: 138. 1784.

Common names: Meadow horsetail prêle des prés
Treatment appears in FNA Volume 2.

Aerial stems dimorphic; vegetative stems green, branched, 16–50 cm; hollow center 1/6–1/3 stem diam. Sheaths somewhat elongate, 3–5 × 2–4 mm; teeth 8–18, narrow, 1.5–4 mm, centers dark and margins white. Branches in regular whorls, horizontal to drooping, solid; ridges 3; valleys channeled; 1st internode of each branch equal to or longer than subtending stem sheath; sheath teeth deltate. Fertile stems brown, with stomates, initially unbranched, persisting and becoming branched and green after spore discharge.


Phenology: Cones maturing in late spring.
Habitat: Meadows, wet woodlands
Elevation: 0–2000 m

Distribution

V2 180-distribution-map.gif

Alta., B.C., Man., N.B., Nfld. and Labr. (Nfld.), N.W.T., N.S., Ont., P.E.I., Que., Sask., Yukon, Alaska, Conn., Ill., Iowa, Maine, Mass., Mich., Minn., N.H., N.Y., N.Dak., Vt., Wis., n Eurasia to ne China, Japan in Hokkaido

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Equisetum pratense"
Richard L. Hauke +
Ehrhart +
Undefined subg. Hippochaete +
horizontal;drooping +
few +  and lacking +
Meadow horsetail +  and prêle des prés +
pointed +
0.3 cm3 mm <br />0.003 m <br /> (10 cm100 mm <br />0.1 m <br />) +
Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. (Nfld.) +, N.W.T. +, N.S. +, Ont. +, P.E.I. +, Que. +, Sask. +, Yukon +, Alaska +, Conn. +, Ill. +, Iowa +, Maine +, Mass. +, Mich. +, Minn. +, N.H. +, N.Y. +, N.Dak. +, Vt. +, Wis. +, n Eurasia to ne China +  and Japan in Hokkaido +
0–2000 m +
male +  and unisexual +
smaller than female +
Meadows, wet woodlands +
distinct +
Cones maturing in late spring. +
Hannover. Mag. +
elongate +
branched +  and unbranched +
green +  and brown +
persisting +
fertile +  and vegetative +
16 cm160 mm <br />0.16 m <br /> (50 cm500 mm <br />0.5 m <br />) +
Equisetum pratense +
Equisetum subg. Hippochaete +
species +
toothlike +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
channeled +