474 The Botanical Gazette. [December, 
AMONG RECENT Station bulletins are the following having botanical 
interest: “Colorado weeds,” by C. de 
called loco weeds are not responsible for the loco disease. . 
a no, 21), write, the former upon bac- 
terla connected with the dairy, and the latter upon the impurities of 
clover seed. 
R. Henry L. Cuarke, of the University of Chicago, in the Amert- 
can Naturalist for September, publishes a paper on “The philosophy 
of flower seasons”, which suggests a very interesting field of research. 
The field is suggested in somewhat shadowy outline, and the illustra- 
tions used are meant to be of the most. general kind. After passing 
in review the large groups as represented in the “Manual range , and 
pointing out their season of blooming, the general deduction is made 
that “from early spring to late autumn there is a progression in the 
general character of the flower-groups, from the lower to the higher, 
successive groups succeeding each other in time, parallel groups com- 
Ing synchronously.” Various modifying conditions are mentioned, 
such as the necessities of pollination. 
THE Dares of publication of the parts of Torrey & Gray’s “Flora 
of North America” and Hooker & Arnott’s “Botany of Beechey’s 
