C*.0(<7>>** 



CONTRIBUTIONS FROM THE GRAY HERBARIUM 

 OF HARVARD UNIVERSITY 



New Series. No. XLVII 



ISSUED 



AUG 1C 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. 

 August, 1916 



