Proceedings of the Boston Society of Natural History. . 
Vor. XXXII. No. 6.——Frrruary, 1904. 
CONTRIBUTIONS FROM THE GRAY HERBARIUM OF 
HARVARD UNIVERSITY. : 
bn 
New Series.— No. XXVIII. 
By B. Ti. Rosrnson. 
I, Diagnoses and Synonymy of some Mexican and Central 
. American Eupatoriums. : 
II. Synopsis of the Mikanias of Costa Rica, 
III. Notes on the Genus Mimosa in Mexico and Central America. 
IV. Notes on some Polygonums of western North America. 
V. New Spermatophytes of Mexico and Central America. 
