TABLE OF CONTENTS 
Rhizopogon in North America.... 
S. M. Zeller and C. W. Dodge 
Monograph of the North and Cen- 
tral American Species of the 
Genus Senecio—Part II........ J. M. Greenman 
Correlation of the Strength and 
Durability of Southern Pine........ S. M. Zeller 
Cortieiums Causing  Pellieularia 
Disease of the Coffee Plant, 
Hypochnose of Pomaceous 
Fruits, and Rhizoctonia Disease...... K. A. Burt 
Gautieria in North America...... 
S. M. Zeller and C. W. Dodge 
Notes on Certain Cruciferae........ K. B. Payson 
The Effect of Bordeaux Mixture 
on the Rate of Transpiration... 
B. M. Duggar and W. W. Bonns 
The Thelephoraceae of North 
America. 
A New Selaginella from Mexico 
J. M. Greenman and Norma E. Pfeiffer 
Algological Notes. ІП. А Wood- 
Penetrating Alga, Gomontia lig- 
PCG Gee one лыс Ы G. T. Moore 
Etherization of Tissues and Its 
Effect on Enzyme Activity........ W. W. Bonns 
The Thelephoraceae of North 
Boo. CN РОР K. A. Burt 
PAGE 
1- 36 
37-107 
109-118 
119-152 
133-142 
143-151 
153-176 
177-203 
225-299 
301-372 
373-377 
