AGROSTIDEJE. 195 



e. Panicle branched, little interrupted rays 2-15 



cm. long (g) 



g. Floral glume 10 mm. long. . . .10 



g. Also some plants of 25 



g. Floral glume less than 10 mm. (excepting 



some of 23) (li) 



h. First glume 3-5 mm., floral glume 5-9 



mm. long 21 



h. First glume 4-6 mm., floral glume 5-6 



mm. long. . 2-1 



h. First glume 7 mm., floral glume 5-6 



mm. long 23 



h. First glume 8-10 mm., floral glume T-8 



mm. long 22 



h. First glume 6-9 mm., floral glume 7-11 



mm. long, and in some varieties first 



glume 9-13 mm. long, floral glume 18- 



20 mm. long; very variable. . . .25 



C. Awns three, not jointed with the floral glume, the lateral 



ones very short or ohsulete. 



a. Central awn stout, 2-3 cm. long, hooked-recurved at the 



base when dry 26 



a. Central awn 5-6 mm. long, reflexedand twice coiled at the 



base when dry 27 



a. Central awn not hooked nor coiled at the base when 



dry (b) 



b. Floral glume 6 mm. long, culm erect filiform. . . 28 



b. Floral glume longer, culm stouter (c) 



c. Empty glumes equal, or the first one longer. . (e) 

 e. First empty glume 7-8 mm. long or often 



obsolete 32 



e. Empty glumes nearly equal. 6-8 mm. long. 29 

 e. Emptyglumesnearly equal, 9-1 1mm. long. 30 

 e. First glume 10-12 mm., second 7 mm. long. 31 



e. First glume 8-13 mm, long 33 



c. Empty glumes unequal, second one longer. . (d) 



