1	"Upper part of awn scabrous, scabridities up to 0.4 mm long"	2
1	"Upper part of awn (seta) pilose, hairs more than 0.4 mm long"	3
2	"Upper part of awns and tips of glumes spirally twisted"	"Stipa capillacea"
2	"Upper part of awsn and tips of glumes not twisted"	"Stipa krylovii"
3	"Ligules of vegetative shoots up to 0.3 mm long; hairs on awn columns 0.6-0.7 mm long"	"Stipa breviflora"
3	"Ligules of vegetative shoots over 2 mm long; hairs on awn columns 1.5-2.5 mm long"	"Stipa klimesii"