Plants annual. Culms to 5 m or more, stout, frequently
tillering. Inflorescence branches remaining intact at maturity, with
1-5 nodes. Sessile spikelets 3-9 mm long, 2-5 mm wide, elliptic to oblong.
Caryopses exposed at maturity.
All the cultivated sorghums are placed in Sorghum bicolor subsp. bicolor.
Grain sorghums have short panicles and panicle branches, broomcorns have elongate
panicles and panicle branches, and sweet sorghums or sorgho produce an abundance
of sweet juice in their stems. For a more detailed treatment, see Harlan and
de Wet (1972).