CONTRIBUTIONS FROM THE NEW YORK BOTANICAL 



GARDEN— No. 33. 



STUDIES IN THE ASCLEPIADACEAE-IV.-Vll. 



By anna MURRAY VAIL 



NEW YORK 

 1903 



[Keprinted from the Bulletin of the Torrey Botanical Club, a6 : 423-431. 17 Au 



1899 ; 38 : 4&5. pi. 30. 27 Au 1901 ; ag ; 662-668. 30 D 1902 ; 



30 : 178, 179, pi. 9, 10. Mr 1903.] 



