The Plant World 



AN ILLUSTRATED 

 MONTHLY JOURNAL OF POPULAR BOTANY. 



ESTABLISHED 1897. 



EDITED BY 



F. H. KNOWLTON, Ph. D., 

 CHARLES LOUIS POLLARD, A. M., 

 CORNELIUS L. SHEAR, B. S. 



VOLUME IV. 



1901. 



THE PLANT WORLD COMPANY, 



Washington, D. C. 



