*Cyperus eragrostis Lam.

Spikelets very numerous in each compact subglobular cluster s per culm), oblong, flat, 2.5–3 mm wide. Glumes 2–2.5 mm long, acute, keeled, greenish yellow or pale brown. Leaves 3–4 mm wide. Tufted perennial 20–100 cm high. Widespread. Waste ground. Introd. from S. America. Umbrella Sedge