TABLE OF CONTENTS 
Morphology of Ceratozamia. Contributions from . 
the Hull Botanical reads 153 one plate 
I and seven figures) - - Charles J. Chamberlain 
The wilting coefficient and its tress aeahinin a- 
tion - - Lyman J. Briggs and H. L. Shantz 
An isolated prairie grove aad its phytogeographi- 
cal significance (with two figures) - - - Henry Allan Gleason 
Some features in the anatomy of the ee 
(with plates II and III) Ruth Holden 
The morphology of the seed of buckewtacat (ith 
eight figures) - Neil E. Stevens 
The liberation of heat in ieartiatios (with, ight 
figures) - George J. Peirce 
Types a Cuban ae (with ues IV-X) Heinrich Hasselbring 
‘The development and cytology of tees 
(with plates XI-XVI)_ - Robert F. Griggs 
American Triassic Neocalamites vith pate XVII 
and one figure) - Edward W. Berry 
The morphology of Lddtets Weritins. Cantal 
tions from the Hull Botanical ee 154 
(with plates X VIII-XX) - - Wanda M. Pfeiffer 
The influence of the seed upon the size of ie fruit 
in Staphylea. I (with four figures) - J. Arthur Harris 
Contributions from the es Mountain 5s 
barium. X - Aven Nelson 
The relative wilting octets for different iets 
Lyman J. Briggs and H. L. Shantz 
Alternation of generations in certain Florideae I. F. Lewis 
A study of hybrids between Nicotiana Bigelovii 7 
and NV. quadrivalvis (with four figures) - - E. M. East 
Observations on oo poe (with plates 
-XXIII - - - Neil E. Stevens 
Relation of the daily Sank of ‘trunapitation to 
variations in the water content of foliage 
eaves - Burton Edward Livingston and ahs iliam Henry Brown 
Ray tracheids in Abies face ee? XXIV a : 
XXV) - W. P. Thompson 
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