Chlorocyperus Rikli; Cyperus subg. Mariscus (Vahl) C. B. Clarke; Papyrus Willdenow

Culms and leaves with Kranz (chlorocyperoid) anatomy. Inflorescences: spikes loose to dense, ovoid to cylindric; rachilla falling early or persistent, wingless or winged. Spikelets: if rachilla articulate at base, spikelets borne in spikes on conspicuous rachis, falling as achenes mature, if rachilla continuous at base, persistent after achenes mature; floral scales persistent or deciduous; stamens 3 (1, less frequently 2 in C. squarrosus and C. granitophilus). Flowers: stigmas 3. Achenes trigonous, sometimes dorsiventrally flattened.

Species ca. 350–400 (59 in the flora): temperate and tropical regions.

SELECTED REFERENCE

Carter, J. R. and S. D. Jones. 1997. Notes on the Cyperus retroflexus complex (Cyperaceae) with three nomenclatural proposals. Rhodora 99: 319–334.