Mar. 1892.] THE BOTANICAL SOCIETY OF EDINBURGH. 



307 



Table IV. MoxTnLY Gieth-increase of Thirty Deciduous 

 Trees — contin ued. 



April. The annual average number of trees which yielded 

 no increase in April was 21 of the 30. In the remarkably 

 late season of 1891 not a single tree showed any April 

 increase at all. The amount rarely exceeded 0*05, but 010 

 was twice recorded in Cytisus Laburnum and once in Prunus 

 Padus, while Cratmgus Oxyacantha once attained 015. 

 Small as are these results, there is no reason to doubt their 

 substantial accuracy, as my former observations on the older 

 set of trees showed even more marked April growth. In 

 one season their aggregate April increase actually exceeded 

 that of May, and in a Quercus conferta the large amount of 

 \ inch was twice recorded. 



In Tilia europma (two trees) JEsculus HippoccLstanum (two) 

 no April growth occurred ; in Acer Pseudo-p)laianus (two) and 



