Compilation
Cyperus dives

Robust perennial with a few stems from a short woody rhizome; roots often reddish; stems 50–150 cm long and 5–15 mm thick, triangular, smooth, the basal part covered by rather thick leaf-sheaths. Basal leaves many, up to 80 cm long and 1.5–3.5 cm wide, flat, scabrid at least on margin and major ribs; leaf sheaths purple at least below. Inflorescence a 10–30 cm long and 15–30 cm wide open anthela consisting of a few sessile or shortly stalked spikes and 5–15 clusters of spikes on 2–20 cm long inflorescence-branches (rays); primary involucral bracts leafy, the largest 20–80 cm long and 1.5–2.5 cm wide, erect or spreading. Spikes 1–3 x 0.6–1.5 cm, with 30–120 spreading and very crowded spikelets. Spikelets 3–5 (rarely to 10) mm long and 1–1.5 mm wide, linear-lanceolate, flattened, brown or golden, 6–20-flowered. Glumes 1.2–1.8 mm long, ovate, golden with darker reddish brown margin and an excurrent green midrib; lateral nerves indistinct. Stamens 3. Style 3-branched. Nutlet 0.6–0.8 x 0.4–0.5 mm, triangular, elliptic, greyish and almost smooth.