Proceedings of the American Academy of Arts and Sciences, 
VoL. XXXV. No. 16.— Marca, 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. Ros- 
III. New Dioscoreas from Mexico. By E. B. ULins. 
IV. New Phaenogams, chiefly Gamopetalae, from Mexico and Central 
America. By B. L. Ropinson. 
VOL, xxxv. — 20 
