Cyperus dentatus |
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tooth flatsedge |
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Habit | 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. |
Cyperus dentatus |
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Phenology | Fruiting summer. |
Habitat | Emergent sandy, peaty, or gravelly shorelines |
Elevation | 0–600 m (0–2000 ft) |
Distribution |
CT; DC; DE; IN; MA; MD; ME; NC; NH; NY; PA; RI; SC; TN; VA; VT; NB; NS; ON; QC
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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.). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 23, p. 151. |
Parent taxa | Cyperaceae > Cyperus > subg. Pycnostachys |
Sibling taxa | |
Name authority | Torrey: Fl. N. Middle United States 1: 61. (1824) |
Web links |