80 



THE TRUE GRASSES. 



barefooted, like C. myosuroides Humb. & Kunth, in South 

 America. 



69. (14) Pennisetum Pers. Spikelets in racemes, spikes 

 or false spikes, narrow or ovate, single or in groups of 

 twos or threes, usually surrounded with many (rarely with 

 only one) dissimilar bristles. First empty glume very 



Fig. 30. — A. Cenchrus echinatus 

 L. (After Mart, and Eichler, 

 FI. bras., II. II. pi. 43.) L, In- 

 volucre of C. tribuloides L. 

 L,, Cross-section of the same- 

 B, Sp. of latter. (After A. 

 Gray, Man. pi. 14.) 



Fig. 31. — Pennisetum Prieurii 

 Kunth. (After Kunth, Revis. 

 pi. 119.) 



small, flowering glume shorter than the second empty 

 glume. Styles often united, projecting from the apex of 

 the spikelet. 



Species forty, mostly in tropical and sub-tropical 

 Africa ; one in Southern Europe, and a few in America 

 and Asia. 



