194 POACE/K. 



a. Awns united, solid und twisted at the base less than 2 cm. 



louK (b) 



b. Floral glume to tlie base of the diverging awns 30 mm. 



long 5 



b. Floral glume to the base of the diverging awns 15 mm. 



long 



b. Floral glume to the base of the diverging awns 10 mm. 



long. 



b. Floral glume to the base of the diverging awns 6-10 



mm. long H, 9 



a. Base of one or more awns with one or more wide curls at 



the base when dry (b) 



b. Spikolots in a long strict spik*^ 10, 11 



b, Spikelets in simi)le panicles 1*^ 



a. Base of the awns spirally curled little if any, though often 



bent when dry (b) 



b. Lower empty glume the longer (c) 



c. First glume 12 mm., second 7-9 mm. lon^, tloral 



glume H mm. long 13 



c. First glume 7-13 mm., floral glume 4-1 mm. long. 14 

 b. Empty glumes equal or the upper one longer. . . (c) 

 c. First glume half as long as the second, some of . 26 

 c. Less than half ditt'erence in the glumes of any spike- 

 let (d) 



d. Floral glume 15 mm. long, lirst glume 3-"- 



nerved 15 



d. Floral glume 4 mm. long, first glume 1-nerved. 16 

 d. Floral glume 4.5 mm. long, first glume 1- 



nervod IT 



d. Floral glume 5-14 mm. long, first glume 1- 



nerved (e) 



e. Panicle 20-60 cm. long. rays 10-15 cm. long, 

 flower-bearing above the middle. , . .18 



e. Also some plants of 19 



e. Panicle spikelike 30 cm. long with no rays 

 which are 10 cm. long or much interrupted. 20 



