FLORAL EMBLEMS. 61 
not seem to depend upon any external cause, 
and is not occasioned by any touch, irritation, 
or movement in the air ; or is affected by the 
sun’s rays, for the plant is fond of shade, and 
the leaves revolve well on rainy days, and 
during- the nig-ht; but when exposed to too 
much wind or sun, it is quiet. One leaflet is 
frequently revolved, whilst the others on the 
same petiole are quiescent; sometimes about 
half the leaflets are in motion at the same time, 
and at others the whole plant is agitated as if 
it had a soul ill at rest. 
