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
Base of style not dilated
Glumes distichous (Fig. 46 i,l)
Inflorescence generally spicate or paniculate. Rhachis of spikelet zig-zag Schoenus