SMITHSONIAN INSTITUTION 



U N I T H 1 ) S T A T E S N A T I O N A I. Mi's h U M 



CONTRIBUTIONS 



FROM THK 



United States National IIeriiuio 



Volume X, Part 7 



STUDIES OF TROPICAL AMERICAN 

 FERNS-No. 1 



By WILLIAM R. MAXON 



WASHINGTON 



GOVERNMENT PRINTING OFFICE 



1908 



