APPLICATION OF THE QUANTITATIVE METHOD 219 



species of grasses. This is enough to give an idea of the method. 

 I take Agrostis alba as a whole, and bring under this name^. 

 alba L., A. vulgaris With, and their so-called varieties, adopting 

 provisionally the view of BENTHAM {Handbook of the British 

 Flora, 1866, p. 533). Dimensions in millimetres : 



Table I 

 Length of the blade of the upper leaf of the fertile stem 



Table II 

 Length of the first empty glume (awn excluded) 



Minimum 



Glyceria fluitans 

 Agrostis alba 

 Festuca pratensis Huds. 

 Melica uniflora 

 Alopecurus pratensis 

 Bromus asper 



1-6 



1-8 

 20 

 27 

 3-8 

 4-0 



Maximum 



Agrostis alba 

 Glyceria fluitans 

 Festuca pratensis Huds. 

 Melica uniflora 

 Alopecurus pratensis 

 Bromus asper 



3-2 

 4-0 

 4-3 

 5-5 

 6-5 

 7-6 



Table III 



Length of the first flowering glume (awn excluded) 



Minimum 



Agrostis alba 

 Melica uniflora 

 Alopecurus pratensis 

 Glyceria fluitans 

 Festuca pratensis Huds. 

 Bromus asper 



Maximum 



1-4 Agrostis alba 



3 '2 Melica uniflora 



3 '4 Alopecurus pratensis 



4'0 Glyceria fluitans 



47 Festuca pratensis Huds. 



87 Bromus asper 



Table IV 



Length of the awn of the first flowering glume 



Minimum 



Glyceria fluitans 



MeliCa uniflora o 

 Festuca pratensis Huds. 



Agrostis alba 0^04 



Bromus asper 4"0 



Alopecurus pratensis 47 



Maximum 



Glyceria fluitans 

 Melica uniflora 

 Festuca pratensis Huds. 

 Agrostis alba 

 Bromus asper 

 Alopecurus pratensis 



2-3 

 5-0 

 6-0 

 70 

 7-6 

 130 





 o 



2-0 



2-8 



60 



100 



