420 EUPHORBIA COROLLATA. 
in speaking of Aletris farinosa, the writer states, 
that the Aborigines made use of “the roots of 
Tythymal, of which there are two sorts, the one 
jlore minimo herbaceo, the other Jflore albo. The 
flower of this last,” he says, “is small, but large 
in comparison with the other. They are repentes, 
and grow in old manured grounds.’ They chiefly 
make use of the latter of these, and it is a most 
excellent purge, though it sometimes vomits. It 
is quick but moderate in its effect, and has this pe- 
culiarity, that it opens the body, when other more 
violent purgatives will not move it.’ We might 
safely conclude that the white flowering species, 
here noticed, is the Euphorbia corollata, were it 
not for the term repentes applied to both plants. 
It is not improbable that in this respect, the 
writer might have been misinformed, , 
Pursh informs us that Euphorbia corollata 
grows in dry fields from Canada to Carolina. I 
have never met with it north of Pennsylvania. 
The drawing which illustrates our description is 
from a specimen cultivated in the Botanic garden 
at Cambridge. It is a tall, erect plant, from 
one to five feet in height, resembling, at a dis- 
tance, some of the white flowering corymbifere. 
At begins to flower in June, but is not fully ex- 
panded until July or August. Its specific . 
