IpubHcations 



OP THE 



XDinivetstti? of Ipennei^lvanfa 



New Series No. 6. 



LIBRARY 

 NEW YORK 

 BOTANICAL 



QARX>eN 



COMTRIBDTIONS FROM THE 



Botanical Laboratory 



Vol. II. No. 2. 



Published for the University of Pennsylvania 



Philadelphia 



1901 



GiNN & Company, Selling Agents, 9-13 Tremont Place, Boston, Mass. 



