Cyperus acuminatus Torr. & Hook.
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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 - Tufted annual 0.5–4 dm; lvs few, all near the base, slender and ± elongate, 1–2(–3) mm wide; invol bracts 3–6, unequal, elongate, some or all much surpassing the infl; spikelets 3–7 mm, strongly flattened, 8–20(–40)-fld, borne in very dense, globose clusters on very short axes; scales 1.3–2 mm, ovate, bicarinate basally, strongly 3-nerved, otherwise subhyaline and cellular-reticulate, shortly recurved-acuminate at the tip; rachilla persistent, wingless; stamen 1; anthers 0.5–0.7 mm; achenes rather broadly trigonous, 0.6–1 mm. Streambanks and other wet, low places, tolerant of alkali; Ill. to N.D., Mo., Tex., and n. Mex., e. occasionally to O., Ky. and w. N.C., and w. irregularly to the Pacific.