CONTENTS. 
Page. 
Introduction________-_-- --- - 261 
Descriptive list, with keys___-_-_-_--___________________ _ 264 
Doubtful species_______-__--_-----_-_-----_------------------------ 401 
List of new genera and species and new names____-__- 403 
Catalogue of specimens in the United States National Herbarium, ar- 
ranged by collectors’ names and numbers 405 
Index - --- VII 
