Proceedings of the American Academy of Arts and Sciences. 

 Vol. XXXVI. No. 26. — April, 1901. 



CONTRIBUTIONS FROM THE GRAY HERBARIUM OF 

 HARVARD UNIVERSITY. 



New Series. — No. XX. 



By B. L. Robinson. 



I. Synopsis of the Genus Melampodiurn. 



II. Synopsis of the Genus Nocca. 



III. New Species and newly noted Synonymy among the Spermato- 

 phytes of Mexico and Central America. 



