TABLE OF CONTENTS 



Notes on North American Trees. IX. By C. S. Sargent 1 



New Species, Varieties and Combinations from the Herbarium 

 and Collections of the Arnold Arboretum. By Alfred Rehder : 12 



Notes from Australasia. III. By E. H. Wilson 51 



Notes on American Willows. XII. By Camillo Schneider 



a. Systematic Enumeration of the Sections, Species, Varieties 



and Forms of American Willows 61 



b. Some Remarks on the Hybrids hitherto observed among 



* 



the American Willows 78 



c. Some Remarks on the Geographical Distribution of the 



American Willows 84 



127 



d. Analytical Keys to the Species of American Willows. ... 91 



e. Names Applied to American Willows, but not mentioned 



in the Preceding Notes 116 



f. Index to the Sections, Species, Varieties and Forms of 



American Willows 117 



The First Fifty Years of the Arnold Arboretum. By C. S. 



Sargent 



A List of the Shrubs of Louisiana. By R. S. Cocks 173 



Notes on North American Trees. X. By C. S. Sargent 182 



New Species, Varieties and Combinations from the Herbarium 



and the Collections of the Arnold Arboretum. By 



Alfred Rehder 207 



Two New Asiatic Poplars. By Alfred Rehder 225 



Bibliographical Notes. By Ethelyn M. Tucker 227 



Notes 55 



Errata and Addenda 232 



Index 233 



