66 
An icle on the crown canker disease of roses, with several 
diecae by L. M. Massey, appeared in the December num- 
ber of Phytopathology. This disease is caused by Cylindro- 
cladium scoparium, which has hitherto been considered a sapro- 
phyte and not supposed to occur on roses. No method of control 
has been discovered, but rose-growers are cautioned to sterilize 
their soil and use only healthy stock. 
A twig and leaf disease of Kerria japonica, due to Coccomyces 
Kerriae sp. nov., is described at some length by V. B. Stewart in 
the winter. A sulphur fungicide is recommended for checking 
the disease 
The water-color paintings representing designs of structures 
many members of the Garden. The designs were explained to 
visitors by Mr. Bird and by members of the Garden staff, and 
printed descriptive catalogues were distributed. 
Dr. Rydberg’s “ Flora of the Rocky Mountains and Adjacent 
Plains " was published by him on December 31, 1917. It is an 
octavo book of about L100 pages, containing descriptions of 
5897 species of plants included in 1038 genera. The cov- 
i Cc 
kotas, and British Columbia oO the collections on 
which the work is based are preserved in the herbariu t 
York Botanical Gard r erg has had the co 
operation of many epivespondents over a period of more than 
