1	"Column hairy"	2
1	"Column flabrous"	3
2	"Callus with 2 collars of hair; lower collar, of very short hairs, just above the tip of the callus; upper collar of longer hairs at the base of the lemma body"	"Stipagrostis hirtiglumis"
2	"Callus with 1 continuous hair collar, the hairs increasing in length upwards"	"Stipagrostis uniplumis"
3	"Central awn plumose to the base, 6-7 cm long"	"Stipagrostis paradisea"
3	"Central awn glabrous on the lower half, 2-4.5 cm long"	"Stipagrostis xylosa"