SMITHSONIAN INSTITUTION 



U N I T H 1 ) S T A T E S N A T IONAL MIJSHUM 



CONTRIBUTIONS 



FROM THK 



United States National Herbarium 



Volume X 



SYSTEMATIC INVESTIGATIONS IN PHANEROGAMS. 

 FERNS, AND DIATOMS 



NORTH AMERICAN SPECIES OF FESTUCA; GENUS PTELEA IN THE 

 WESTERN AND SOUTHWESTERN UNITED STATES ANT) MEXICO; 

 MEXICAN AND CENTRAL AMERICAN PLANTS; LEGUMINOSAE 

 OF PORTO RICO; DIATOMS OF THE ALBATROSS VOYAGES; 

 CYPERACHAE OF COSTA RICA; TROPICAL AMERICAN FERNS 



LIBRARY 

 NEW YORK 

 liOTANlv 



QA 



WASHINGTON 

 GOVERNMENT PRINTING OFFICE 



1906-1908 



