EcoFlora - Cyperus eragrostis

Cyperus eragrostis Lam.
Family: Cyperaceae Tall Flat Sedge [Cyperus vegetus Willd.] Max Licher	FNA Resources Gordon C. Tucker, Brian G. Marcks & J. Richard Carter * in Flora of North America (vol. 23) Herbs, perennial, cespitose, rhizomatous. Culms trigonous to terete, (25-)40-60(-90) cm, glabrous. Leaves flat or V-shaped, (10-)25-50 cm × 5-8(-12) mm. Inflorescences: heads globose, (10-)20-40 mm diam.; rays (0-)3-10, 2.5-5(-12) cm; 2d order rays usually absent (when present, 0.5-1.5 cm); bracts 4-8, horizontal to ascending at 15-30°, flat (or V-shaped), 3-30(-50) cm × 1.5-8(-12) mm. Spikelets (20-)30-50(-70), oblong, compressed, 5-20 × 2.2-3 mm; floral scales (12-)20-30(-50), off-white to golden brown, basally 2-keeled, laterally ribless, ovate-deltate, 2-2.3 × 1-1.4 mm (declined 30-40º from rachilla). Flowers: stamen 1; anthers 1-1.2 mm; styles 1-1.2 mm; stigmas 0.5 mm. Achenes black or dark brown, stipitate, broadly ellipsoid, 1.2-1.4 × 0.5-0.6 mm, stipe to 0.1 mm, apex apiculate, beak 0.2-0.3 mm, surfaces puncticulate. Fruiting summer. Damp grasslands, roadsides ditches; 0-200 m; B.C.; Ala., Calif., La., Miss., N.J., Oreg., Pa., S.C., Tex., Wash.; South America; naturalized, Europe. The distributions of Cyperus eragrostis in British Columbia, Alabama, Pennsylvania, South Carolina, and Texas represent introduced populations.
Open Interactive Map Max Licher Sue Carnahan Max Licher Sue Carnahan Sue Carnahan Liz Makings Anthony Mendoza David Thornburg Anthony Mendoza Liz Makings Liz Makings University of Florida Herbarium Click to Display 100 Initial Media - - - - - View All Media