IPublications 



OF THK 



Xllniversit^ of Ipenns^lvania 



Nhw SiCKiics No. 6. 



CONTRIBUTIONS FROM THE 



Botanical Laboratory 



Vol. II. No. 



Published for the University of Pennsylvania 

 Philadelphia ' 



1901 



GfkN & CoMi'ANV, Selling Agents, 9-13 Treniout Place, Boston, Mass. 



