TABLE OF )F CONTENTS 
Variation of fungi due to environment ia thirty- 
seven figures) - - F. L, Stevens and J. C. Hall 
The development of the icin a fertiliza- 
tion in Juniperus communis and J geen srt vir- 
giniana (with plates I-IV) - Alice M. Ottley 
The structure of the wood in the Pineae (with sitie v) Irving W. Bailey 
Evolutionary tendencies among gymnosperms. Con- 
tributions from the Hull Botanical oo 
I27 - John M. Coulter 
On similarity in oS baat of sedis ind 1 potassium 
(with four figures) -  - - W.J.V. Osterhout 
Toxic and antagonistic effects of salts as iid to 
ammonification by Bacillus subtilis ms five 
figures) Chas. B. Lipman 
The cuivistonbeiia of Calon (with ae VIL-IX) Lula Pace 
On mesarch structure in Lycopodium (with plate X) Edmund W. Sinnott 
Preliminary account of the ovule, gametophytes, and 
embryo of Widdringtonia apie deg ier: gt 
XI and three figures) W. T. Saxton 
The behavior of chromosomes in Onis lataX 
O. - Contributions from the Hull Botanical 
ry 128 (with plates XII-XIV) - Reginald Ruggles Gates 
The pena: of the a in sac of Smilacina 
stellata (with plate XV) - F. McAllister 
A study of pifion pine - - F. J. Phillips 
The embryo sac of Habenaria (with nesive inn William H. Brown 
The influence of traction on the formation of mechani- 
cal tissue in stems) - - John S. Bordner 
The modifiability of transpiration in young 3 seeing 
(with five figures) - Joseph Y. Bergen 
A remarkable Amanita (with ‘isha oimaat - George F. Atkinson 
Undescribed plants from Guatemala and die Cen- 
tral American republics. XXXII John Donnell Smith 
Some fungus parasites of algae (with seven fee George F, Atkinson 
Mitosis in Synchytrium (with plates XVI-XVIII)_- Robert F. Griggs 
Influence of oe on oa two 
figures) - George E. Stone 
Cytology of Cutleria ‘<a Netacicas Keesha 
from the Hull Botanical Laboratory 129 - - Shigéo Yamanouchi 
v 
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