Sorghum bicolor subsp. drummondii (Steud.) de Wet ex Davidse, 1993
Sorghum bicolor × Sorghum arundinaceum
Sorghum × drummondii (Sudan grass), is a hybrid-derived species of grass raised for forage and grain, native to tropical and subtropical regions of Eastern Africa. It may also be known as Sorghum bicolor × Sorghum arundinaceum after its parents. Some authorities consider all three species to be subspecies under S. bicolor.[2]