UNITED STATES DEPARTMENT OF AGRICULTURE 

 BULLETIN No. 179 



Contribution from the Boreaa of Plant Indostry 

 WM. A. TAYLOE, Chief 



Washington, D. C. 



PROFESSIONAL PAPER 



April 2, 1915 



NATIVE AMERICAN SPECIES OF 

 PRUNUS 



By 

 W. F. WIGHT, Botanist 



CONTENTS 



Introdaetkni 



Dlstribntion 



VariaUoD and AdaptebUity . . 

 E*iij History of American Fliuaa 

 Emrty BoUnical DeMriptions . . 



Page 

 1 

 1 



2 



2 



S 



Page 

 Horticnltofal History and Develop- 

 ment 6 



Systematic Botany 17 



Literature Cited 73 



WASHINGTON 

 GOVEBNMENT PRINTING OFFICE 



1915 



