Mar. 1892.] THE BOTx\.NICAL SOCIETY OF EDINBURGH. 



293 



Q. RobiLT. The four young Oaks differ considerably in their 

 amounts and p.c, due probably to their being affected in 

 different degrees by an insect plague, yet they agree in some 

 important respects, as in the superiority of the second half- 

 season, the average of the four, 65'5 p.c, agreeing closely 

 with 62 p.c, that of the older Craigiehall tree. 



They also agree in July being very decidedly their best 

 month, the p.c. varying between 39 and 43'5. That of the 

 old tree, 41 p.c, is in close agreement. 



Q. Cerris. In No. 63 the second half-season increase very 

 little exceeded the first, but in the two Turkish Oaks of the 

 former set the proportions for the second half were 67 p.c in 

 No. 43, and 68*5 p.c. in No. 10*, thus closely agreeing 

 with Q. Rohur. 



All three agree with the five British Oaks in July being 

 the best month, although it does not predominate so decidedly 

 in the former as in the latter, the p.c. varying from 31 to 

 37 instead of from 39 to 43-5. 



The three Turkish Oaks are remarkable in this respect, 

 that their June increase is very much below that of May. 



Q. rubra. Transplantation greatly reduced its increase, but 

 in the p.c. it agrees closely with the other Oaks. The half- 

 season proportions are 39 and 63, and July is much the 

 best month, with 39 p.c. 



Q. Hex, in the half-season proportions followed the 

 rule of the Oaks but to an excessive degree, the p.c for the 

 second period being 75. July again was the best month, 

 although only with 32 p.c, and the p.c. of September was 

 very remarkable, being no less than 19. 



QuERCus coNFEETA {fovmer set). 



