Proceedings of the American Academy of Arts and Sciences, 
VoL. XXXY. No. 16.— Marca, 1900. 
i CONTRIBUTIONS FROM THE GRAY HERBARIUM OF 
HARVARD UNIVERSITY. 
New Serits.—No, XVIII. 
Bu 
New Species and Varieties of Mexican Plants. By J. M. 
GREENMAN, 
II. Synopses of the Genera Jaegerta and Russelia. By B. L. Ros- 
INSON. 
III. New Dioscoreas from Mexico. By E. B. Uine. 
IV. New Phaenogams, chiefly Gamopetalae, from México and Central 
America. By B. L. Rosinson. 
