Cyperus grayi Gray’s flatsedge Cyperaceae CYGR; Q, a, i, j, rb, tl; K, m, pl; R, cp, sb;


Cyperus grayi.Ben Kimball.New England Wild Flower

Cyperus grayi.By Ben Kimball. Copyright © 2015 Ben Kimball.New England Wild Flower (accessed 4/2014).

Cyperus grayi is a perennial C4 sedge (Li et al. 1999), with basal corms from a hard rhizome, stems tufted, very tough, smooth, to 40 cm. 

Leaves folded, stiff, shorter than wiry stems. 

Flower spikelets about 1 cm, 3-9 flowered, greenish-brown, radiating in more or less rounded, star-shaped clusters to 2.5 cm diameter, axis of spikelet winged, short, to 1.2 cm, scales overlapping, blunt, many-veined, about 0.2 cm long; inflorescence bracts, 3-7, mostly longer than inflorescence, rays of inflorescence 4-10, to 8 cm long;

Fruit an achene 3-sided, to 0.2 cm, sides flat; blooms and fruits July-Oct. 

Wetland status: NL. 

Frequency in NYC: Occasional. 

Origin: Native. 

Habitat: Dry, sandy soil or fill, open areas, beaches.