COMPARATIVE ANALYSIS. 



231 



Flowers without a rudiment of a second floret 



Flower with a minute pedicel, bearing a tuft of hair (a 



rudiment of a second floret) 



Hairs as long as the corolla, awn near the base . 

 Hairs shorter than the corolla, awn above the middle . 



AGROSTIS. 



Inner valve of corolla wanting, or minute 



Inner valve of corolla not minute . 



Leaves linear, awn dorsal 



Leaves setaceous, awn basal 



Awn very long and terminal, florets with a barren pedicel 

 at base ..... 



Awn none, or short and dorsal, no barren pedicel 



Ligule short and truncate, outer valve of corolla three- 

 nerved ..... 



Ligule oblong, outer valve of corolla five-nerved 



Branches whorled 



Glumes shorter than the florets 



CATABBOSA. 

 AIKOCHLOA. 



AlEA. 



1. Awn clavate .... 

 Awn not clavate .... 



2. Leaves linear, awns not or but little longer than corolla 

 Leaves setaceous, awns longer than corolla . 



3. Awn basal, branches rough 

 Awn dorsal, branches smooth 



4. Florets hairy at base 

 Florets scarcely hairy at base 



5. Panicle close, awn basal 

 Panicle spreading, awn dorsal 



MELICA. 



1. Panicle drooping, florets not longer than the calyx 

 Panicle erect, florets much longer than the calyx 



2. Spikelets with two perfect florets 

 Spikelets with one perfect floret 



3. Leaves much shorter than the purplish panicle 

 Leaves much longer than the pale panicle 



Epigejos. 



Lapponica. 

 Strict a. 



2 

 3 



Canina. 

 . Setacea. 



Spica-venti. 

 4 



Vulgaris. 

 Alia. 



Aquatica. 

 . Cristata. 



Canescens. 

 2 

 3 

 4 



(M. caerulea 



HOLCTJS. 



Awn longer than the calyx, joints of culm downy 

 Awn not longer than the calyx, joints not downy 



. Alpina. 

 Flexuosa. 



5 



Pracox. 

 Caryophyllea. 



2 

 3 



. Nutans. 



Uniflora. 



. Cterulea. 



Depauperata. 



/?. Hooker.} 



Mollis. 

 Lanatut. 



