Cyperus. triandria monogynia. 203 



the length of the umbel ; partial minute, setaceous. Umbel 

 decompound, composed of one sessile umbellet in the centre, 

 and from four to eight spreading, compound ones in the cir- 

 cumference, supported on fine, compressed peduncles of 

 unequal lengths. Spikelets filiform, from ten to twenty- 

 flowered. Scales obtuse. Stamens three. Seed oblong, 

 compressed. 



Obs. Its naked, exactly three sided culms, and scarcity 

 of short leaves readily distinguish it from all the other species 

 I have yet described. C. teyeium has the angles rounded, 

 and no leaves. 



33. C. procerus. Rottb. gram. 29. /. b.f. 3. 



Culms from three to six feet high, angles sharp. Umbel 

 decompound. Involucres none; spikelets alternate, linear ; 

 flowers diandrous. Seeds obcordate, compressed, without 

 angles. 



Pota-pulfu. Rlieed. Mai. 12. p. 93. t. 50. 



Is a native of moist vallies, rivulets, &c. amongst the moun- 

 tains. 



Obs. In Bengal this plant, or one exceedingly like it, (for 

 it diners from it only in having three stamens, the culm, 

 leaves, umbels, scales, and seeds being the same) grows on 

 the banks of the Ganges and so low as frequently to be entire- 

 ly underwater during the high tides; yet it thrives and helps 

 to bind the banks of the rivers where it grows, and is one of 

 those plants that prevent their giving way so much to the 

 rapidity of the stream as they otherwise would do. 



34. C. spinulosus. R. 



Culms from three to five feet high, rigid. Umbel scarcely 

 decompound ; spikes long and short peduncled, globular; 

 spikelets rigid, from three to four-flowered ; involucre and 

 involucels many-leaved. 



Telmg. Kurra-twnga. 



A large strong coarse species, grows in ditches and water 

 courses. 



