Schoenus nigricans |
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black bog-rush, black sedge |
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Rhizomes | short, oblique. |
Culms | hollow, glabrous. |
Leaves | basal sheaths blackish, conspicuously wider than leaf blades; blades 10–40 cm × 0.8–2 mm, margins involute, smooth or scabridulous. |
Inflorescences | loosely ovoid, 1–2 cm; bracts 1 or 2, oblique to erect, green to dark brown or black, 1–6 cm × 1–1.5 mm. |
Spikelets | (1–)10–25, flattened, oblong-ellipsoid; rachilla wingless, ± deciduous at maturity; basal scales 2–3, sterile; floral scales 3–8, laterally veinless, medially 1-veined, oblong, apex acute, not mucronate, distally scabrellate. |
Flowers | perianth bristles 0–6, smooth or scabrellate; anthers linear, connective apices subulate, conspicuous; styles 0.6–1 mm; stigmas 0.5 mm. |
Achenes | whitish, ovoid to ellipsoid, 1–1.5 × 0.9–1.2 mm, glossy, apex obtuse, smooth or barely reticulate. |
2n | = 54, 55. |
Schoenus nigricans |
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Phenology | Fruiting summer. |
Habitat | Damp, calcareous or alkaline grasslands |
Elevation | 0–2000 m (0–6600 ft) |
Distribution |
CA; FL; NV; TX; Mexico; Eurasia; Africa; Australia
|
Source | FNA vol. 23, p. 240. |
Parent taxa | Cyperaceae > Schoenus |
Name authority | Linnaeus: Sp. Pl. 1: 43. (1753) |
Web links |