Cyperaceae >
Leaf sheath closed or rarely open and then the perianth reduced to bristles or minute scales Cyperaceae
Flowers bisexual or unisexual but never enclosed in a utricle and never apparently separated into unisexual spikelets
Spikelets with more than 2 perfect flowers
Perianth scales often numerous but always with 2 lateral ones keeled or at least concave; usually a number of flat ones inside these lateral scales
Spikelet solitary, globular or subglobular. Nut with 8 prominent ribs. Glumes loose; perianth scales ± exserted from the glumes Chorizandra
Inflorescence ovoid-globular, almost sheathed by the elongated base of the bract. Leaves up to 80 cm long, c. 2 mm diam.. Culms often shorter. Flowers not flattened. Glumes obtuse. Perianth scales all oblong-spathulate, ± concave. Coast. Swampy places Chorizandra cymbaria