Difference between revisions of "Cyperus cuspidatus"
in A. von Humboldt et al., Nov. Gen. Sp. 1: 204. 1816.
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Revision as of 19:07, 24 September 2019
Herbs, annual, cespitose. Culms 1–6(–25), trigonous to roundly trigonous, (0.5–)2–5(–9) cm × 0.2–0.4–(0.6) mm, glabrous. Leaves 1–6, V-shaped, 1–6 cm × 0.3–1 mm. Inflorescences: heads digitate, loosely ovoid, 3–18 × 3–26 mm; rays (0–)1–6(–8), 2.5–20(–30) mm; bracts 2–3(–5), horizontal to ascending at 45(–60)°, V-shaped, 2–60 × 0.3–1.2 mm. Spikelets (3–)10–20(–30), greenish to reddish brown, narrowly ellipsoid to oblong, 3–11 × (0.8–)1.2–1.5 mm; floral scales (3–)6–20(–28), laterally greenish to reddish brown, glossy, medially greenish to light reddish brown, strongly recurved, laterally ribless, medially strongly 3-ribbed, oblong-ovate, (0.8–)1–1.3 × 0.8–1(–1.2) mm, apex emarginate, cusp 0.6–1.2 mm. Flowers: stamens 2 or 3; anthers oblong-ovoid, 0.1(–0.2) mm; styles (0.2–)0.4–0.6 mm; stigmas 0.3–0.5 mm. Achenes brown, oblong-obovoid, (0.5–)0.6 × (0.3–)0.4 mm, base cuneate, apex blunt, surfaces coarsely papillose.
Phenology: Fruiting summer.
Habitat: Damp, disturbed soils
Elevation: 0–300 m
Distribution
Ala., Fla., Ga., S.C., Mexico, Central America, South America.
Discussion
Selected References
None.