GRAMINE^ 301 



More than 100 others grow in the lower mountains and adjacent 

 plains, but it is almost impossible to say what proportion of the 

 whole are to be found in the sub- Alps, and the number of grasses 

 which are purely sub-alpine is extremely small. 



The following genera comprise most of the high Alpine species 

 and some of the sub-alpine, viz. Phleum, Agrostis, Deschampsia, 

 Stipa, Trisetum, Avena, Sesleria, Poa, and Festuca. 



In addition there are many sub-alpine grasses which belong 

 to the following genera, viz. Alopecurus, Air a, Anthoxanthum, 

 Milium, Sieglingia (Triodia), Koeleria, Melica, Cynosurus, Nardus. 



In the whole of Switzerland there are, on the authority of Schinz 

 and Keller, 169 species of Grammes in addition to a few sub-species. 1 

 In the British Isles there are not more than about 135 species, 

 excluding all varieties, notwithstanding the very long coast- 

 line and great variety of geological formation. 



We regret that from want of space it is impossible to give de- 

 scriptions of the grasses, for any adequate account of so numerous 

 a family would make the volume too large. 



1 Flore de la Sut'sse, by Schinz and Keller. Ed. fran9aise par Wilczek et 

 Schinz (1909). 



