Cyperus houghtonii Torr.
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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 - Much like no. 25 [Cyperus schweinitzii Torr.]; stems smooth, rather obtusely angled, mostly 0.5–1.5 mm thick below the infl; lvs smooth or scabrous on the margins; invol bracts divergently ascending or ± spreading, scales rotund, 2–2.5 mm, in side-view over half as wide as long, multinerved, obtuse or the uppermost minutely mucronulate; achenes 1.5–2 mm, two-thirds as thick (or a little thicker), trigonous with evidently concave faces; 2n=ca 168–172. Dry, often sandy soil, commonly with Pinus banksiana; Mass., N.H., Vt., and s. Que. to Minn. and nw. Ind.; isolated (as a waif?) in n. Va. and e. W.Va. Thought to be derived by stabilizing selection from hybrids between nos. 25 and 27 [Cyperus lupulinus (Spreng.) Marcks] but the achenes different from both.