PERSONALITY OF PLANTS 
the intruder. The animal world cannot exhibit 
a higher sensitiveness to touch than that dis- 
played by the celebrated Venus Fly-Trap. On 
each side of the leaf midrib stand three 
sharp little bristles. ‘They are the sense organs 
controlling the closing of the vegetable spring. 
Quick must an insect be to escape their vigilance. 
Sensation and imagery are so closely con- 
nected in the human brain that the existence of 
one would seem to predicate the other. Fortun- 
ately, we have very good evidence to indicate 
the faculty of plant memory, which must ne- 
cessarily be built up of images of one kind or 
another. 
If a plant which is accustomed to folding its 
leaves together in sleep on the setting of the 
sun, be placed in a completely dark room, it 
will continue to decline and elevate its foliage 
at regular intervals, indicating that it remem- 
bers the necessity for rest even with the re- 
minder of outside stimuli lacking. 
By what faculty do plants become aware of 
the approach of spring? Only occasionally are 
they deceived by January thaws, and no matter 
how unseasonably cold a March may be, they 
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