AGROSTIDE.E. 213 



■a. Awn mucli shorter (b) 



b. Floral glume G-8 mm. long, hairs on the awu 1 



mm. long '^ 



b. Floral glume 8-12 mm. long, hairs on the awn 3-6 



mm. long 3 



B. Awn not plumose, pubescence, if any, less than 1 mm. 



long (c) 



C. Awn 5 cm. or more long (d) 



d. Awn stout, 9-17 cm. long, empty glumes 30-45 



mm. long 4 



d. Awn weak, tortuose, 10-15 cm. long, empty glumes 



20-30 mm. long 5 



d. Awn weak, tortuose, 10-15 cm. long, empty glumes 



5-6 mm. long 6 



d. Awn capillary, 7-8 cm. long, empty glumes 5-8 



mm. long 7 



d. Awn capillary, 12-18 cm. long, empty glumes 6-7 



mm. long 8 



d. Awn of medium size, 6-10 cm. long, empty glumes 



16-20 mm. long 9 



d. Awn of medium size, 4-6 cm. long, empty glumes 



10-13 mm. long, floret 9-10 mm. long. ... 10 



d. Awn slender, 6 cm. long, empty glumes 7-13 mm. 

 long, floret G-7 mm. long 11 



c. Awn less than 5 cm. long (possibly excepting some of 

 No. 16) (e) 



e. Floral glume 9-10 mm. long, empty glumes unequal, 

 first one the longer by 2-4 mm 12 



e. Floral glume 4-7 mm long (i) 



i. Floral glume 7 mm. long, first empty [glume 



12-15 mm., second 10-11 mm. long 13 



i. Floral glume 7 mm. long, first empty glume 12- 



16 mm., second 10-14 mm. long 14 



i. Floral glume 4-6 mm. long (m) 



m. First glume 8-10 mm., second Q-S mm. 



