1	"Plants perennial; lower glume of sessile spikelets with a membranous tip uo 1/3 the length if the body, shallowly bifid; column of awn minutely ciliolate along the edges of the coils"	"Sehima nervosus"
1	"Plants annual; lower glumes of sessile spikelets with a membranous tip as long as the body, deeply bifid; coumn of awns ciliate along the edges of the coils"	"Sehima ischaemoides"