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 A. 

 alba h., 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 



Minimum Maximum 



