Awn subulate, not twisted. 
Flowering glume with a circle of hairs at bottom, and distant tufts of hairs 
on margins and back ... ... ... ... ... 7. D. pilosa. 
Awn twisted at the base. 
Flowering glume with a circle of long hairs beneath the lobes, and a 
second circle of shorter hairs near the bottom ... ... 8. D. semi-annular 
Flowering glume fringed on the margins only with long silky hairs ... 9 . D. Buchanani. 
Awn very short, lobes not longer than their base. 
Flowering glume with one tuft of hairs on each margin ... ... 10. D. nuda. 
Flowering glume with a fringe of hairs on the lower half of margins ... 11. D. pauciflura. 
