Cyperus distinctus |
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swamp flatsedge |
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Habit | Herbs, perennial, cespitose, rhizomatous. |
Culms | terete, 40–60(–90)cm, glabrous. |
Leaves | flat, 35–70 cm × 4–9(–12) mm. |
Inflorescences | heads hemispheric, 10–20 mm diam.; rays 5–9(–14), 3.5–10 cm; 2d order rays 0.5–2 cm; bracts 5–10, ± horizontal, flat, 12–40(–50) cm × 2–7 mm. |
Spikelets | (25–)35–50(–60), ovoid, compressed, (3.5–)5–12(–14) × 2.5–3.5(–4) mm; floral scales 10–32, golden brown to brown, 2-keeled, laterally ribless, narrowly lanceolate, 2–2.2(–3) × 0.8–1.4 mm. |
Flowers | stamen 1; anthers 1 mm; styles 1 mm; stigmas 0.5 mm. |
Achenes | brown, stipitate, narrowly ellipsoid, 1.5–2 × 0.2–0.4 mm, base swollen, spongy, stipe 0.2 × 0.2–0.3 mm, apex acute, beak slender, 0.2 mm, surfaces puncticulate. |
Cyperus distinctus |
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Phenology | Fruiting summer. |
Habitat | Damp grasslands, roadsides, ditches |
Elevation | 0–50 m (0–200 ft) |
Distribution |
FL; GA; LA; SC; West Indies (Bahamas) |
Discussion | The slender achenes with conspicuously swollen bases distinguish Cyperus distinctus from other species of subg. Pycnostachys. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 23, p. 154. |
Parent taxa | Cyperaceae > Cyperus > subg. Pycnostachys |
Sibling taxa | |
Synonyms | C. virens var. brittonii |
Name authority | Steudel: Syn. Pl. Glumac. 2: 24. (1855) |
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