SMITHSONIAN INSTITUTION 
UNITED STATES NATIONAL MUSEUM 
CONTRIBUTIONS 
FROM THE 
~Uwerep Staves NATIONAL HERBARIUM 
VOLUME 18 
SYSTEMATIC INVESTIGATIONS 
\ OF 
TROPICAL AMERICAN PLANTS 
PITTIER, HITCHCOCK and CHASE 
SAFFORD, STANDLEY 
WASHINGTON 
GOVERNMENT PRINTING OFFICE 
1914-1917 
