U.S. DEPARTMENT OF AGRICULTURE. 
DIVISION OF BOTANY. 
CONTRIBUTIONS 
FROM 
THE U. S. NATIONAL HERBARIUM. 
Vol. II.—No. 2. 
ISSUED JUNE 10, 1894. 
_ PRELIMINARY REVISION OF THE NORTH AMERICAN 
SPECIES OF CACTUS, ANHALONIUM, 
AND LOPHOPHORA, 
BY 
JOHN M. COULTER. 
en oii 
PUBLISHED BY AUTHORITY OF THE SECRETARY OF AGRICULTURE. 
WASHINGTON: 
GOVERNMENT PRINTING OFFICE. 
1894. 
