JOURNAL 



OF 



The New York Botanical Garden 



R. S. WILLIAMS 



The Leafy Spurge becoming a Pest • 



Tropical Trees with Light-weight Wood J 



Publications of the Staff, Scholars and Students of the New York 



Botanical Garden during the year 1920 j 



Spring and Summer Lectures I 



Conference Notes for March I 



Notes, News and Comment I 



Price $1.00 a Year; io Cents a Copy 

 Published for the Garden 



