vi 
CONTENTS [VOLUME XLIX 
Charles Reid Barnes (with portrait) - : 397 
Physiologically arid habitats and Snake resistance 
in plants (with twelve figures) - W. D. Hoyt 340 
. Variation and correlation in rays and disk Hlovets of 
Aster fastigiatus (with four figures)  - - H. Nakano 371 
The effect of some toxic solutions on mitosis (with 
seven figures) - - arner W. Stockberger 402 
The relation of hairy and ciitinized coverings to trans- 
piration (with one figure) - - Karl M. Wiegand 430 
The morphology of the peridial cells in the Rosiiltiee 
(with plates XXI and XXII and two figures) - Frank Dunn Kern 445 
Undescribed plants from Guatemala and other Cen- 
i Ill 
tral American Republics. XXX - - - John Donnell Smith 453 
BRIEFER ARTICLES— 
CuRRE 
The microsporophylls of Ginkgo. Contributions 
from the Hull Botanical — 134 —e 
plate VII) - - Anna M. Starr 51 
Alternation of generations ‘il salty in Dict. 
ota dichotoma - - W.D. Hoyt 55 
Microtechnique for eae structures- - - ‘Irving W. Bailey 57 .° 
Vivipary in Tillandsia cst ae L. “a one 
figure) John W. Harshberger 59 
The riiotopies! scaniisioas be the deodopaiest 
of monoecious ee in Onoclea poses & 
Py - - Elizabeth Dorothy Wuist 216 
Cecidology in Rinarice - . - Mel. T. Cook 219 
Fixing and staining tannin in silat tissues .ak 
nitrous ethers (with eight figures) - A. E. Vinson 222 
An abnormal bract-modification in cotton vith 
one figure) H.A. Allard 303 
-.. The biological antagonism ctweds en waa 
magnesium - . Oscar Loew 304 
A simple vaporimeter vit one figure) . - oe N. Transeau 459 
Phylogeny of plants - - J.B. Lotsy 460 
RATURE— - 60, 149, 225, 305, 379, 462 
For titles of book reviews see cindex seg coker? s 
name and reviews 
Papers noticed in ‘‘Notes for Students” are in- 
dexed under author’s name and subjects 
DATES OF PUBLICATION 
No. 1, January 22; No. 2, ogee 16; No. 3, March 15; No. 4, ‘aoe 193 
No. 5, May 17; No. 6, June 23 
