*Cyperus aggregatus
Spikes oblong-cylindrical to ovoid, 1–6, sessile or nearly so at the apex of the culm. Spikelets oblong-elliptic, with setaceous bracteoles, Glumes 3–4 mm long, greenish or brown, striate all over. Culms sharply 3-angular. Leaves flat, smooth. Bracts divergent or reflexed. Widespread. Weed in waste places. Introd. from N. America