Difference between revisions of "Cyperus dentatus"
Fl. N. Middle United States 1: 61. 1824.
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|publication year=1824 | |publication year=1824 | ||
|special status=Illustrated;Endemic | |special status=Illustrated;Endemic | ||
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|genus=Cyperus | |genus=Cyperus | ||
|subgenus=Cyperus subg. Pycnostachys | |subgenus=Cyperus subg. Pycnostachys | ||
Latest revision as of 20:39, 5 November 2020
Herbs, perennial, cespitose, rhizomatous; stolons tuberiferous, 1–10 cm. Culms trigonous, 8–50 cm × 1–3 mm. Leaves flat or V-shaped, 10–40 cm × 2–5 mm. Inflorescences: heads digitate, 8–18 mm diam.; rays 4–9, 1–8 cm; 2d order rays 0.5–2 cm; bracts 3–5, ± horizontal, flat, 1–20 cm × 1–4 mm. Spikelets commonly proliferous, 2–6, linear to oblong, compressed, 3–24 × 2–2.5 mm; floral scales 3–20(–50), reddish brown, laterally 1–3-ribbed, ovate, 2–2.5 × 1.5–2 mm. Flowers: stamens 3; anthers 1.5 mm; styles 1 mm; stigmas 1.5 mm. Achenes reddish brown, sessile, obovoid, 0.8–1 × 0.4–0.5 mm, apex obtuse, scarcely apiculate, surfaces glabrous.
Phenology: Fruiting summer.
Habitat: Emergent sandy, peaty, or gravelly shorelines
Elevation: 0–600 m
Distribution
N.B., N.S., Ont., Que., Conn., Del., D.C., Ind., Maine., Md., Mass., N.H., N.Y., N.C., Pa., R.I., S.C., Tenn., Vt., Va.
Discussion
The report of Cyperus dentatus from West Virginia (M. V. McGivney 1938) is erroneous; the cited specimen was from New Jersey (Gutenberg s.n. 1886, US) (M. Strong, pers. comm.).
Selected References
None.