JANUARY, 1917 
TECHNICAL BULLETIN 13 
NORTH CAROLINA 
Agricultural Experiment Station 
conducted jointly by the 
STATE DEPARTMENT OF AGRICULTURE 
AND THE 
NORTH CAROLINA STATE COLLEGE OF 
AGRICULTURE AND ENGINEERING 
RALEIGH AND WEST RALEIGH 
BIOLOGICAL INVESTIGATION OF 
SPHENOPHORUS CALLOSUS OLIV* 
Z. P. METCALF 
BULLETINS OF THE STATION WILL BE SENT FREE TO CITIZENS OF THE STATE ON REQUEST 
EDWARDS & BROUGHTON PRINTING CO., RALEIGH. N. C. 
