Transactions of The Academy of Science of St. Louis. 
VOL. VI. No. 13. 
. A STUDY OF THE RELATIONS OF SALIX NIGRA 
AND SALIX AMYGDALOIDES, TOGETHER WITH 
THE HYBRIDS ARISING FROM THEM AS THESE 
SPECIES EXHIBIT THEMSELVES IN THE VICIN- 
ITY OF ST. LOUIS. ; 
N. M. GLATFELTER, M. D. 
Issued April 17, 1894. 
