U.S. DEPARTMENT OF AGRICULTURE. 
DIVISION OF BOTANY. 
CONTRIBUTIONS 
FROM 
THE U.S. NATIONAL HERBARIUM. 
Vol. IH, No. 8. 
ISSUE] JUNE, 13, 1896, 
FLORA OF THE BLACK HILLS OF SOUTH DAKOTA. 
BY 
PAL. RYDBERG. 
WASHINGTON: 
GOVERNMENT PRINTING OFFICE. 
1896. 
