248 The Botanical Gazette. [April, 
Messrs. D. T. MacDougal of the University of Minnesota, Geo. J. 
Peirce of the State University of Indiana an A. Harper of Lake 
Forest University have recently been elected to membership in the 
Deutsche Botanische Gesellschaft. 
(N. M., no. 1 ). A general account is given. It was introduced into 
THE ABRASION of tree trunks by snow and sleet driven by the wind 
was observed by Mr. P. M. Van Epps (Science 8: 442) in a forest in 
New York. The bark was worn away on the westward side to the 
height of three or four feet above the surface of the snow, the freshly 
exposed surfaces giving a conspicuous dull yellow color. 
c 
this journal (20: 547) on the mimicry of parasitic fungi in insects, ne 
en€ Ferry (Rev. Mycol. 78: 67) suggests that while insects whic 
mimic healthy leaves receive protection from insect eating foes, those 
which mimic diseased leaves have an added protection from the nc 
dental injury by leaf-eating enemies 
Dr. Correns of Tiibingen announces his discovery of irritability a 
tendrils to changes in temperature in the Boranische Zeitung for Ja. 
16t j of. D. T. Mac Dougtl 
in the laboratory for plant physiology of Purdue University in Novett 
AMONG the new African lants discovered by Dr. A boa 
: / y T. . it. 
Smith are two new genera, Donaldsonia Baker, said to suggest aioe 
ot f 
(Feb.). Baseonema Schlechter & Rendle is another Purl 
genus, belonging to th . ; aa 
Journ. Bot. (March). e Asclepiadaceze, described a 
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