Schoenoplectus acutus var. acutus

Common names: Hard-stem bulrush scirpe aigu
Treatment appears in FNA Volume 23. Treatment on page 49. Mentioned on page 48.

Culms dark green, 1–3 m × 2–6 mm, very firm, rarely soft, air cavities in distal 1/4 mostly 0.5 mm wide. Leaves: sheath fronts coarsely pinnate-fibrillose. Inflorescences 2 times branched, branches mostly stiffly ascending. Spikelets 3–40, 6–18 × 3–4 mm. Flowers: perianth bristles 6, equaling achene body; styles 2-fid. Achenes plano-convex. 2n = 36, 38.


Phenology: Fruiting summer.
Habitat: Fresh, often calcareous to brackish marshes, fens, lakes, slow streams, often emergent in water to 1.5 m
Elevation: 0–2700 m

Distribution

V23 66-distribution-map.jpg

Alta., B.C., Man., N.B., Nfld. and Labr. (Nfld.), N.W.T., N.S., Ont., P.E.I., Que., Sask., Yukon, Alaska, Ark., Colo., Conn., Del., Idaho, Ill., Ind., Iowa, Kans., Ky., Maine, Md., Mass., Mich., Minn., Mo., Mont., Nebr., N.H., N.J., N.Y., N.C., N.Dak., Ohio, Okla., Pa., R.I., S.Dak., Tex., Vt., Va., Wash., Wis., Wyo., probably Eurasia.

Discussion

Selected References

None.

Lower Taxa

None.
S. Galen Smith +
(Muhlenberg ex Bigelow) Á. Löve & D. Löve +
Scirpus acutus +
Hard-stem bulrush +  and scirpe aigu +
Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. (Nfld.) +, N.W.T. +, N.S. +, Ont. +, P.E.I. +, Que. +, Sask. +, Yukon +, Alaska +, Ark. +, Colo. +, Conn. +, Del. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Mo. +, Mont. +, Nebr. +, N.H. +, N.J. +, N.Y. +, N.C. +, N.Dak. +, Ohio +, Okla. +, Pa. +, R.I. +, S.Dak. +, Tex. +, Vt. +, Va. +, Wash. +, Wis. +, Wyo. +  and probably Eurasia. +
0–2700 m +
Fresh, often calcareous to brackish marshes, fens, lakes, slow streams, often emergent in water to 1.5 m +
Fruiting summer. +
Bull. Torrey Bot. Club +
W2 +, W1 +  and Illustrated +
Schoenoplectus acutus var. acutus +
Schoenoplectus acutus +
variety +