DHEA HLH TS 
of 
Botanical Observation and Criticism, Vol. 1 | 
by S 
Edward L. Greene. 
Distribution of Bidens vulgata. 
Soon after having published this species I ventured a sugges- 
tion that, inasmuch as it is notably less common at the east than 
B. frondosa, it might have come to this side of the continent 
from the West (Pitt. iv. 250). 
A recent September tour through parts of Indiana, Ilinois, 
Wisconsin, and Minnesota gave the opportunity of observing 
the species in many western localities; and the opinion which I 
had almost adopted as to its western nativity is not confirmed. 
I found the plant everywhere, but everywhere much less com- 
mon than its ally, B. frondosa; also almost invariably a ten- 
ant of cultivated grounds, gardens, cornfields, etc., whereas 
B. frondosa,in the upper Mississippi valley as in that of the 
Potomac, abounds in wild uncultivated lowlands along streams 
and margins of lakes and ponds, where B. vu/ga/a is never seen. 
I everywhere observed of B. frondosa that in its maturest 
autumnal state the whole herbage is of a bronzy purple; but 
B. vulgata remains green. | 
LEAFLETS, Vol. I, pp. 1-16, issued 24 Nov., 1908. 
