Cyperus cuspidatus
in A. von Humboldt et al., Nov. Gen. Sp. 1: 204. 1816.
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, oblongovate, (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.
Lower Taxa
"shortened" is not a number.