Vol. VI. 
NOVEMBER, 1919 
No. 9 
AMERICAN 
JOURNAL OF BOTANY 
OFFICIAL PUBLICATION OF THE 
BOTANICAL SOCIETY OF AMERICA 
CONTENTS 
A study of some factors in the chemical stimulation of the growth of Asper- 
gillus niger (concluded) , Robert Aaron Steinberg 357 
An index of hardiness in peach buds ... Earl S. Johnston 373 
Notes on the dasheen and chayote Heber W. Youngken 380 
The development of the gametophyte and the distribution of sexual characters 
in Funaria hygrometrica . . - . . . . ... , Mabel Mary Brown 387 
PUBLISHED 
IN COOPERATION WITH THE BOTANICAL SOCIETY OF AMERICA 
BY THfe 
BROOKLYN BOTANIC GARDEN 
At 41 North Queen Street, Lancaster, Pa. 
Entered as lecond^class matter February si. 1914, at the post office at Lancaster, Penntylvaout, 
under the act of March 3, 1879 
