Vol. VII JUNE, 1920 No. 6 
AMERICAN 
JOURNAL OF BOTANY 
OFFICIAL PUBLICATION OF THE 
BOTANICAL SOCIETY OF AMERICA 
CONTENTS 
The fusion of the ventral canal cell and egg in Sphagnum subsecundum 
Geo. S. Bryan 223 
The geographical distribution of North Dakota plants . . . . O. A. Stevens 231 
Longevity of the seeds of cereals, clovers, and timothy . . . , H. B. Sifton 243 
On the anatomy of Chenopodium album . . . . . Ernst F. Artschwager 252 
IN COOPERATION WITH THE BOTANICAL SOCIETY OF AMERICA 
At 41 North Queen Street, Lancaster, Pa 
BY THE ( 
BROOKLYN BOTANIC GARDEN 
Brooklyn, N. Y. 
Entered as second-class matter February 21, 1914, at the post office at Lancaster, PennsylTania, 
under the act of March 3, 1879 
