122 TRANSACTIONS AND PROCEEDINGS OF THE [Sess. lxvi. 



plants which may well have been introduced, and from 

 the 46 annuals of this zone the 28 introduced annuals, 

 we find the percentage of those left to be 6 '61. 



Distribution in season. 



We must turn to the seasonal variation and sum it up. 

 In this connection we have used the dates of collection 

 attached to specimens in the Kew and Cambridge 

 Herbaria, in order to amplify our own data ; in both 

 herbaria Clova plants are abundant. 



Au(fust September 



Table III. gives the actual figures recorded, and the 

 curves opposite indicate graphically the early maxima of 

 classes A and AB, the late maxima of B^ and B, and 

 the burst of flowering in the higher classes with which 

 summer begins at the coming in of June. Those who 

 know these hills will recognise that their own experience 

 bears this out. In May, a flower here and there appears 



