77 



Fig. 71. PENNISETUM SETOSUM (Sw.j Rich, in Pers. Syn. l : 72. 1805. 

 ( Cenchrus sdosii.^ S\v. Fl. Ind. Oec. 1 : 26. 1797. )— A.stout, • branching, perennial 

 9-12 dm. (3°-4°) high, with flat, glabrous leaves and dense, bristly, cylindrical 

 spikes 10-15 cm. (4'-7') long. Sheaths loose, striate; leaf blades broadly-linear, 

 glabrous. Involucres (a) sessile, several of the bristles more than twice as long 

 as the single spikelet (6); first glume small, the .second and third equaling the 

 flowering glume (o).— Southern Florida. (Widely distributed in tropical coun- 

 tries.) September. 



