i 



TABLE OF CONTENTS 



115 



Introduction. By C. S. Sargent 



Notes on American Willows. V. The Species of the Pleo- 



NANDRAE Group. By CamUlo Schneider 1 



A Phytogeographical Sketch of the Ligneous Flora of Korea, 

 By E, IL Wilson 32 



New Species, Varieties and Combinations from the Herba- 

 rium and Collections of the Arnold Arboretum. By Alfred 



Rehder 44 



Notes on North American Trees. V. By C. S, Sargent . . , Gl 

 Notes on American Willows. VI. By Camillo Schneider . , . G7 

 The Bonin Islands and their Ligneous Vegetation. By E, H. 



Wilson 97 



New Woody Plants from the Bonin Islands. By Alfred Rehder 



and E, H. Wilson 



New Species, Varieties and Combinations from the Herbarium 



and the Collections of the Arnold Arboretum. By Alfred 



Rehder 121 



Notes on American Willows. VIL By Camillo Schneider . . .147 

 The Liukiu Islands and their Ligneous Vegetation. By E. H. 



Wilson 171 



Four New Conifers from Korea. By E. IL Wilson . . . .186 

 Tetraplasia, a New Genus of Rubiaceae. By Alfred Rehder . 190 

 New Species, Varieties and Combinations from the Herbarium 

 and the Collections of the Arnold Arboretum. By Alfred 

 Rehder 191 



Notes on American Willows. VIIL By Camillo Schneider . .211 

 The Canyon Flora of the Edwards Plateau of Texas. By 



Ernest J. Palmer 233 



Camphor, Cinnamomum Camphora Nees & Ebermaier. By E. 



H, Wilson 



. 239 



The American and Asiatic Species of Sassafras. By Alfred 



Reh de 



r 



243 



Notes on North American Trees. VI. By C. S. Sargent , . 245 

 New Species, Varieties and Combinations from the Herbarium 

 and the Collections of the Arnold Arboretum. By Alfred 

 Rehder 



254 



Notes 66, 264 



Errata 



265 



Index ,,.,,,,,,, ^67 



