Cyperus tetraphyllus
Spikelets mostly erect or suberect on the rhachis, 1–6 on each umbel ray. Glumes dark red or blackish, contrasting with the whitish nut which is about as long as the glume but spreading beyond the margins of the glume. Umbel rays up to 10, simple, unequal. Bracts 3–6, leafy. Culms up to 60 cm high. Widespread. RF