1	"Leaves usually smooth on the lower surface; upper glumes 5.5-9 mm long; rachilla hairs copious, silky, 8.5-12 mm long"	"Phragmites australis"
1	"Leaves scabrous on the lower surface, at least towards the ip; upper glumes 5-6 mm long; rachilla hairs sparse, 4-7(-8) mm long"	"Phragmites karka"