PLANTS THAT, CARRS 
STAND ALONE 
LREADY we have learned that 
some stems grow under ground, 
and that by most people these are 
called roots. 
And among those which grow 
above the ground we see many dif- 
ferent kinds. 
The stem of Indian corn grows 
straight up in the air, and needs no 
help in standing erect. 
Fig. 123 shows you the morning- 
glory plant, the stem of which is 
unable to hold itself upright with- 
out assistance. A great many 
plants seem to need this same 
sort of help; and it is very in- 
teresting to watch their behavior. 
The stem of the young morning- 
glory sweeps slowly through the air in 
circles, in search of some support. 
You remember that the curious dodder 
acted in this same way, and that its movements 
reminded us of the manner in which a blind 
man feels about him 
14 
