VOLUME LVII NUMBER 6 
Tne 
BOTANICAL GAZETTE 
JUNE sora 
WINTER AS A FACTOR IN THE XEROPHILY OF 
CERTAIN EVERGREEN ERICADS! 
FRANK CALEB GATES 
(WITH TWELVE FIGURES) 
Of late years considerable attention has been drawn toward the 
apparently anomalous condition of several plants with obvious 
xerophytic modifications living in bogs with an apparently unlimited 
water supply. Many explanations of this apparent anomaly have 
been attempted. It was with a desire to obtain further knowledge 
upon the question that the author entered upon this piece of 
research work in the Botanical Department of the University of 
Michigan in the fall of 1910. 
The work was carried on under the direction and supervision 
of Professor F. C. Newcomspe. To him I am greatly indebted 
both for the opportunity to work and for his stimulating criticism 
throughout the work. To Dr. H. A. Greason and to Dr. J. B. 
PotLock, both of the University of Michigan, I am also indebted 
for helpful conferences during the course of the work. To Mr. 
W. B. McDoveatt, of the University of Michigan, I am further 
indebted for the examination of material for the presence of myco- 
thiza. The nomenclature is that of the seventh edition of Gray’s 
Manual. 
* Contribution from the Botanical Laboratory of the University of Michigan, 
no. 136, The part of this work done during the summer of 1912 was carried on with 
the aid of a grant from the American Association for the Advancement of Science. 
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