HACKEL's ANDROPOGONEiE. 



346 



and Heteropogon, admitted as genera by Bentham, stand as sub- 

 genera of Andropogon. Hackel also understands by a "species" 

 pretty nearly what Bentham did ; thus the old cultivated Sorghums 

 are but a single species, Andropogon Sorghum Brotero. 



The subjoined table shows the arrangement of the tribe by 

 Hackel : — 



Species of the Tribe Andropogone^. 



