*Cyperus congestus
Leaves and bracts thin flat or with revolute margins, never internally septate. Umbel with a few rays or often with only a single compound cluster. Glumes c. 4 mm long, sides 3–4-nerved, acute. Keel green. Spikelets 1–2 mm wide, 8–24- flowered. Tufted perennial, often apparently annual. Coast and adjacent plateaus. Weed in waste places