XXlll 



Tribe 5. Agroste^s. Bent Grass family. 

 Spikelets one-flowered, rarely having the rudiment of a second 

 flower above. Glumes and palese membranaceous; the lower palea 

 usually awned. Stigmas generally sessile. 



Agrostis. Gastridium. 



Apera. Polypogon. 



The typical genus is an important one on account of its extent 

 and wide distribution, but they are not valuable meadow Grasses 

 in the aggregate. 



Tribe 6. ARUNDiNEiE. Reed family. 

 Spikelets either one-flowered or many-flowered. Flowers gene- 

 rally surrounded at the base by, or invested with, long soft hairs. 

 Glumes and palese membranaceous ; the former usually as long or 

 longer than the flowers. Lower palea often awned. 



Phragmites. Calamagrostis. 



Ammophila. Deyeuxia. 



Generally tall, coarse Grasses of no agricultural value, but of 

 great importance in the economy of Nature as colonizers. 



Tribe 7. ChlorevB. Cord Grass family. 



Spikelets laterally compressed, one- or more-flowered ; collected 

 into unilateral spikes. Glumes and palese membranaceous; the 

 latter sometimes awned; the former permanent on the rachis, 

 and the anterior one inserted higher up than the other. Spikes 

 digitate or panicled, rarely solitary. Rachis continuous, not 

 jointed. 



Cynodon. Spartina. 



The British species are only of local occurrence ; their habit is 

 that of colonizers. The greater portion of the tribe consists of 

 annual Grasses belonging to warm chmates. 



