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 flattemed 101 cei Se a a see es sie oh ee dag ee DURRA. 
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\ichalky ‘or bluish) whites: 2) 222220 eee nee FETERITA. 
Panicles broadly oval or ovate, inclined to pendent; 
lemmas awned; seeds white or brown......-..-..--..--.-.------0-- Mito. 
Seeds: wihtterse os Ui Cu am. sce vara” Mai ey ee White milo 
Seeds brown. 
Stems\ 2, to) 2ometers biel . fs e3 v2 ena ce Milo. 
Stems 0.8 to 1.3 meters high....2.22.--222:- Dwarf milo. 
Fia. 3.—Seeds of nine varieties of grain sorghums, representing all the different groups: A, Milo; B, 
Alba milo; C,feterita; D, White durra; Z, Durra-kafir hybrid (No. 198-7-3); F’, Blackhull kafir; 
G, Red kafir; H, Mukden (white) kaoliang; J, Manchu (brown) kaoliang. (All natural size.) 
