+1114 General Notes. 
given natural face. 
BOTANY.‘ 
A FEW NOTABLE WEEDS or THE NEBRASKA Pxains.—In 
examining the constitution of various flore one is struck by the fact 
that with the other changes there is a notable change 1n the weedy 
plants as well. Of course a “weed,” from a botanical standpoint, 
is as reputable a plant as any other. It is in fact but an eminently 
successful organism in the struggle for place, and on this account it 
which jog along in a mediocre way, neither advancing nor falling 
much behind under our observation. Upon the Nebraska plains, 
. the plants which push themselves into place so prominently as to 
be called “weeds” by the farmer, are partly artly 
introduced species, some of which have come in from the southwest 
within a comparatively recent period, while others have come along 
with the tide of immigration from the eastern part of the cont- 
nent, and from the old world. e 
© The plant which, all things considered, is the worst weed, from 
the popular point of view, is doubtless the Sand-bur (Cenchrus 
tribuloides L.), a peculiar grass of variable habit. As mostly seen, 
1 Amer. Jour. Sci., Sept., 1888, p. 175. 
2 Ib., Sept., 1888, 
3 Neues Jahrb. f. Min., ete., 1888, ii., p. 230. 
t Edited by Prof Chas. E. Bessey, Lincoln, Neb. 
