CONTENTS 
26. <A Revision of the Genus Flaveria. By J. R. Jonnston. 
27. I. Diagnoses and Synonymy of some Mexican and Central Ameri- 
can Eupatoriums. 
II. Synopsis of the Mikanias of Costa Rica. 
III. Notes on the Genus Mimosa in Mexico and Central America. 
IV. Notes on some Polygonums of western North America. 
V. New Spermatophytes of Mexico and Central America. 
By B. L. Roxprnson. 
28. I. Revision of : Genus Sabazia. By B. L. Rosprnson and J. M. 
GREENMA 
II. Revision “ the Mexican and Central American Species of 
Trizis. By B. L. Ropinson and J. M. GREENMAN 
III. Revision of the Mexican and Central American Species of 
Hieracium. By B. L. Roprnson and J. M. GrEENMAN. 
I¥. Synopsis of the Mexican and Central American Species of Alnus. 
By M. L. FERNALD. 
V. Diagnoses and Synonymy of —— and Central American 
Spermatophytes. By J. M. Gre 
VI. Some New Species of Mexican per Nicerakoan Dicotyledons. 
By M. L. FERNALD. 
29. New Plants from the Islands of Margarita and Coche, Venezuela. 
By J. R. JoHNsToN. 
30. A Revision of the Genus Zermenia. By W. W. Jonss. 
31. I. Descriptions of Spermatophytes from the Southwestern United 
States, Mexico, and Central America. By J. M. GREENMAN. 
II. Diagnoses and Notes Relating to American Eupatorieae. By 
B. L. Ropinson. 
32. Studies in the Eupatorieae. 
I. Revision of the Genus Piqueria. 
II. Revision of the Genus Ophryosporus. 
; The genus Helogyne and its Synonyms. 
IV. Diagnoses and Synonymy of Eupatorieae and of certain other 
Compositae which have been classed with them. 
By B. L. Rosinson. 
