Equisetum ×litorale

Kühlewein

Beitr. Pflanzenk. Russ. Reiches 4: 91. 1845.

Common names: Prêle littorale
Treatment appears in FNA Volume 2.

Aerial stems monomorphic, green, branched or occasionally unbranched, 2–70 cm; hollow center 2/3–4/5 stem diam. Sheaths somewhat elongate, 3.5–8 × 2.5–6 mm; teeth dark, 7–14, narrow, 1–3 mm. Branches mostly from midstem nodes, ascending to spreading, solid; ridges 4–5; valleys channeled; proximal whorls with 1st internode of each branch equal to subtending stem sheath, distal whorls with 1st internode of each branch longer than stem sheath; sheath teeth attenuate.


Phenology: Cones maturing in early summer, but misshapen spores not shed.
Habitat: Ditches, stream banks, wet meadows
Elevation: 0–1000 m

Distribution

V2 760-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., Del., 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.

Discussion

Equisetum × litorale is a hybrid between E. arvense and E. fluviatile. It should be expected where the parents coexist. This hybrid has been mistaken for Equisetum palustre; the solid branches with long first internodes and channeled valleys distinguish it from that species.

Selected References

None.

Lower Taxa

None.
... more about "Equisetum ×litorale"
Richard L. Hauke +
Kühlewein +
Undefined subg. Hippochaete +
ascending;spreading +
few +  and lacking +
Prêle littorale +
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. +, Del. +, 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. +  and Wyo. +
0–1000 m +
male +  and unisexual +
smaller than female +
Ditches, stream banks, wet meadows +
distinct +
Cones maturing in early summer, but misshapen spores not shed. +
Beitr. Pflanzenk. Russ. Reiches +
4 +  and 5 +
3.5mm;8mm +
elongate +
2.5mm;6mm +
unbranched +, branched +  and monomorphic +
persisting +
2 cm20 mm <br />0.02 m <br /> (70 cm700 mm <br />0.7 m <br />) +
Equisetum ×litorale +
Equisetum subg. Hippochaete +
species +
toothlike +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
channeled +