EPARTMENT OF AGRICULTURE. 
4 
Several other grass sorghums discovered in Africa and near-by 
islands since the introduction of Sudan grass into the United States 
indicate the possibilities which exist in this comparatively unexplored 
6 BULLETIN 981, U. S. 
Fig. 4.—A typical plant of the Sumac sorgo-Johnson grass hybrid, F. C. I. No. 5846. Photographed at 
the Arlington Experimental Farm, Va., October 12, 1918. 
continent. Among these introductions are Tunis grass, toura, Kam- 
erun grass, and tabucki grass. 
A discussion of these different grass sorghums has been introduced 
in order to show the very easy and natural gradations in forms already 
