— 
C Ld Werth 
U, S. Matronel Museum. 
U.S. DEPARTMENT OF AGRICULTURE. 
DIVISION OF BOTANY. 
CONTRIBUTIONS 
THE U.S. NATIONAL HERBARIUM. 
_ 
Vol. TLI. — 
REPORTS ON COLLECTIONS, REVISIONS OF GROUPS, 
AND MISCELLANEOUS PAPERS, 
REVISIONS OF NORTH AMERICAN GRAMINEA AND CACTACEA, STUDIES OF SPECIAL 
GROUPS, AND CATALOGUES OF PLANTS COLLECTED IN NEBRASKA, IDAHO, 
SOUTH DAKOTA, KANSAS, WYOMING, ALASKA, AND MEXICO, 
WITH GEOGRAPHIC REPORTS AND DESCRIPTIONS OF 
NEW GENERA AND SPECIES. 
WASHINGTON: 
GOVERNMENT PRINTING OFFICE, 
1892-1896, 
