Proceedings of the American Academy of Arts and Sciences. 

 Vol. XXXV. No. 16. — March, 1900. 



CONTRIBUTIONS FROM THE GRAY HERBARIUM OF 

 HARVARD UNIVERSITY. 



New Series. — No. XVIII. 



I. New Species and .Varieties of Mexican Plants. By J. M. 

 Greenman. 



II. Synopses of the Genera Jaegeria and Russelia. By B. L. Rob- 

 inson. 



III. New Dioscoreas from Mexico. By E. B. Ulixe. 



IV. New Phaenogams, chiefly Gamopetalae, from Mexico and Central 



America. By B. L. Robixjon. 



vol. xxxv. — 20 



