Tribe 8. Avene^. Oat family. 

 Spikelets two- or more-flowered ; the terminal flower generally 

 incomplete. Glumes and palese membranaceous. Lower palea 

 mostly awned ; the awn usually dorsal and twisted. 

 Aira. Avena. 



Corynephorus. Trisetum. 



Lagurus. Arrhenatherum. 



A valuable tribe as containing the cultivated Oats; but the 

 British species are mostly hard, wiry Grasses, disliked by cattle, 

 and apparently containing little nutriment. 



Tribe 9. FESTUCEiE. Meadow Grass family, 

 Spikelets many-flowered, rarely few-flowered. Glumes and 

 palese membranaceous, rarely coriaceous ; the lower palea generally 

 awned, the awn not twisted. Inflorescence usually paniculate. 



Sesleria. Briza. 



Triodia. Catabrosa. 



Kcsleria. Cynosurus. 



Melica. Dactylis 



Molinia. Festuca. 



Poa. Bromus. 



Glyceria. Serrafalcus. 



Sclerochloa. 

 The Grasses of this extensive tribe constitute a large proportion 

 of the herbage of our meadows. They vary greatly in their nu- 

 tritive properties ; but many species of Poa and Festuca are among 

 the most valuable belonging to northern climates. 



Tribe 10. HordejE. Com family. 

 Spikelets one- or two- to many-flowered; the terminal flower 

 incomplete. Glumes and palese herbaceous; the former occa- 

 sionally deficient. Stigmas sessile. Ovary mostly hairy. In- 

 florescence spicate ; spike simple, solitary ; rachis rarely jointed. 



