556 
CXII. CYPERACEiE 
Stamens 3. Nut one third the length of the glume, broadly ovoid, 
black or dark brown, faces concave. 
Abundant throughout India, ascending to 4000 ft. — All warm regions. 
7. Cyperus aristatus, Rottb. ; FI. Br. Ind. vi. 606. Annual, 
glabrous ; stems tufted, 2-6 in., very slender. Leaves often 
longer than the stem. Umbel simple ; rays few, usually less than 
i in., sometimes contracted in a single, dense head. Spikelets 
\ in., red-brown, crowded in ovoid spikes J-f in. Glumes 8-12, 
nerves 5 or more, tip long, bristle-like, recurved. Stamens 3 or 2. 
Nut one third the length of the glume, narrowly obovoid, pale 
brown. 
Throughout India, ascending to 8000 ft. — Most warm and temperate regions. 
8. Cyperus Iria, Linn. ; FI. Br. Ind. vi. 606. Annual, glabrous ; 
stems tufted, 6-24 in. Leaves \ in. broad, often nearly as long 
as the stem. Umbel simple or compound, varying much in size, 
