1921] SCHAFFNER—HEMP 201 
end of life. The staminate plants usually began to die soon after 
the first inflorescence had come to bloom, while the carpellate plants 
usually lived for several months, after the first seeds had ripened, 
and continued to bloom from new lateral branches. Occasionally 
a carpellate plant was entirely rejuvenated and put out a second 
system of shoots which had all the signs and characteristics of the 
original sprout coming from the 
seed. A few staminate plants 
transplanted and carefully nur- 
‘ tured also showed ena- 
tion and continued to produce 
branches below for some time, 
but they mostly became senile 
and died after the blooming of the 
firstinfl CO 
wmilatar 
Sexual dimorphism 
Hemp as grown under normal 
conditions is distinctly dimor- 
phic, both as to flowers and 
vegetative characters. The veg- 
etative dimorphism, however, is 
much greater in plants grown 
under the abnormal greenhouse 
environment (text fig. 1, a and 0). 
The plants experimented with, 
of course, had their sexual state 
already established in the em- 
Fic. 1.—Cannabis saliva: staminate (a) 
and carpellate plant (6) of same age, 
grown in greenhouse in winter, showing 
bryo of the seed, and whatever 
changes were induced had their 
origin during the vegetative 
growth, between the period of 
decided sexual dimorphism; each plant 
showed reversal of sex and produced 
sporophylls of opposite nature; plants 
transferred from plot in greenhouse to 
pots just before being photographed. 
sprouting and the origin of the 
incepts of the opposite types of flowers. This must be true for all 
plants, except perhaps for the few intermediate individuals in which 
the confused condition of sexual expression might have been due to 
a definite genetic constitution which would allow of a mixed sexual 
