j Vol. VII. APRIL, 1920 No. 4 
AMERICAN 
JOURNAL OF BOTANY 
OFFICIAL PUBLICATION OF THE 
BOTANICAL SOCIETY OF AMERICA 
CONTENTS 
Embryo deTelopment^-and polyembryony in relation to the phylogeny of 
conifers . . . . . . . . . . . . . John T. Buchholz 125 
The living cycads and the phylogeny of seed plants. 
, Charles J. Chamberlain 146 
Distribution and relationship of the cycadeoids .... . G. R. Wieland 154 
PUBLISHED 
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 s«cond.clas« m«tt«r February 21, 1914, at the post dffice at Lancaster, PennayWanla, 
under the act of March 3, itjg 
