CONTRIBUTIONS FROM THE GRAY HERBARIUM 
OF HARVARD UNIVERSITY 
New Srrres.—No. XLVII 
ISSUED 
AUG 10 1916 
A REVISION OF THE GENUS POLYGALA 
IN MEXICO, CENTRAL AMERICA, 
AND THE WEST INDIES 
By S. F. BLAKE 
HARVARD UNIVERSITY PRESS 
CAMBRIDGE, MASS., U.S.A. 
Aucust, 1916 
