Vol. XLIX No. 3 
THE 
BoTANICAL GAZETTE 
March 1910 
Editors: JOHN M. COULTER and CHARLES R. BARNES 
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CONTENTS 
On the Origin of the Broad Ray in Quercus Arthur J. Eames 
The Prothallia of Aneimia and Lygodium Edith Minot Twiss 
The Structure and Relationship of Urnula geaster 
F. D. Heald and F. A. Wolf 
The Exchange of Material between Nucleus and Cyto- 
plasm in Peperomia sintenisii William H. Brown 
Development of the Helvellineae W. A. McCubbin 
On Physiologically Balanced Solutions for Bacteria 
Charles B. Lipman 
Briefer Articles 
The dese feos Conditions for the Development of Monoe 
othallia in Onoclea Struthiopteris Elizabeth Donthy ‘Wuist 
Cocidotiey § in America Mel. T. Cook 
Fixing and Staining Tannin in Plant Tissues with Nitrous Ethers 
A. E. Vinson 
Current Literature 
The University of Chicago Press 
CHICAGO and NEW YORE 
William Wesley and Son, London 
