Eleocharis robbinsii Oakes
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Authority
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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Family
Cyperaceae
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Scientific Name
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Description
Species Description - Cespitose and rhizomatous perennial, in water often producing floating tufts of capillary stems; fertile stems slender, triangular, 2–7 dm, 1–2 mm thick; sheaths brown, obliquely truncate; spikelet lanceolate, 1–2(–2.5) cm × 2–3 mm, acute to almost subulate, 4–8-fld; scales few, lance-ovate, tapering to an obtuse tip, scarious-margined; bristles conspicuously toothed, surpassing the achene; style trifid; achene biconvex, obovoid, brown, 2–2.5 mm, constricted above to an urn-shaped neck, marked with vertical rows of transversely elongate cells; tubercle flattened, acuminate, a quarter to half as long as the achene. In mud or shallow water; along the coast from N.B. and N.S. to Fla., and inland from N.Y. to Ind., Mich., and Wis.