CONTENTS 
No. 1 
A contribution to our knowledge of Arisaema triphyllum. F. L. 
PıckerT. Pp. 1-55. pl. 1-5. Issued August 30, 1915. 
No. 2 
Descriptions of Cuban plants new to science. Pp. 57-118. N. L. 
Brirron. Issued September 13, 1920. 
No. 3 
The correspondence of Schweinitz and Torrey. Edited by ©. L. 
SHEAR and NEIL E. Stevens. ` Pp. 119-300. pl. 6-7. Issued 
July 16, 1921. 
