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FNA | Family List | FNA Vol. 23 | Cyperaceae | Eleocharis

21a. Eleocharis tenuis (Willdenow) Schultes var. tenuis

Éléocharide grêle

Rhizomes 0.4–1 mm thick, soft to hard, longer internodes (2–)5–10 mm, scales seldom decaying to fibers. Culms to 0.35 mm wide. Leaves: distal leaf sheaths with or without apical tooth to 0.2 mm. Flowers: perianth bristles sometimes present. Achenes lemon yellow, stramineous, or yellow-green, finely rugulose and usually finely cancellate at 10–20X, with 8–12 (often obscure) depressions in each vertical series. Tubercles as high as wide or sometimes greatly depressed. 2n = 24.

Fruiting summer. Freshwater shores, wet woods, bogs, ditches; 10–1100 m; N.B., N.S., P.E.I., Que.; Calif., Conn., Del., Ky., La., Maine, Md., Mass., N.H., N.J., N.Y., N.C., Ohio, Okla., Pa., R.I., S.C., Tenn., Vt., Va., W.Va.

Occasionally plants of Eleocharis tenuis var. tenuis are found mostly submerged.


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