18 BULLETIN 698, U. S. DEPARTMENT OF AGRICULTURE. 



spikelets broadly obovate, 4.5 to 6 mm. wide; seeds broadly obovate 

 to lenticular, 4 to 6 mm. in diameter, rather strongly flattened. The 

 varieties of this group may be separated by the following key: 



Glumes greenish white, densely pubescent, not transversely wrinkled; 



seeds much flattened Durea. 



Seeds white; lemmas awned White durra. 



Seeds brown; lemmas not awned Brown durra. 



Glumes dark brown to black, thinly pubescent to 



glabrate, transversely wrinkled; seeds less flattened. 



Panicles narrowly oval, always erect; lemmas not 



awned; seeds chalky or bluish white Feterita. 



Panicles broadly oval or ovate, inclined to pendent; 



lemmas awned; seeds white or brown Mild. 



Seeds white White milo 



Seeds brown. 



Stems 1.2 to 2 meters high Milo. 



Stems 0.8 to 1.3 meters high Dwarf milo . 



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Fig. 3.— Seeds of nine varieties of grain sorghums, representing all the different groups: ^, Milo; £, 

 Alba milo; C, feterita; 2) /white durra; i;, Durra-kaflr hybrid (No. 198-7-3); J', Blackhull kaflr; 

 <?, Red kaflr; U, Mukden (white) kaoliang; I, Manchu (brown) kaoliang. (All natural size.) 



