XXll 



Tribe 2. PhalaIie^. Canary Grass family. 

 Spikelets laterally compressed, with one perfect flower, and, 

 frequently, one or even two others which are either male only or 

 rudimentary. Glumes two, generally nearly equal. Palese often 

 glossy and hardening over the fruit. Styles or stigmas elongated. 

 Phalaris. Anthoxanthum. 



Knappia. Hierochloe. 



Phleum. Alopecurus. 



Holcus. 

 Some of our most common and most nutritious pasture Grasses 

 belong to this tribe. 



Tribe 3. Panics^. Millet family. 

 Spikelets more or less dorsally compressed, with one perfect 

 flower and, generally, the rudiment of a second. Glumes thinner 

 than the palese, the lower one smaller, both occasionally abortive. 

 Palese of a leathery or paper-like texture, usually awnless, the lower 

 one concave. 



Milium. Echinochloa. 



Digitaria, Setaria. 



Several species are cultivated in other countries on account of 

 their farinaceous seeds; but, with the exception of Milium, the 

 British species are of rare occurrence and unimportant. 



Tribe 4. Stipes. Feather Grass family. 

 Spikelets not compressed, one-flowered. Glumes nearly equal, 

 membranaceous. Lower palea rolled inwards, awned at the apex, 

 becoming indurated around the fruit in maturity. Awn simple or 

 trifid, usually twisted, articulated at the base. Ovary stalked. 



Stipa. 

 The seeds of some of these Grasses rival those of Rice in nutri- 

 tive value ; but the most conspicuous member of the tribe is Stipa 

 pennata. 



