122 THE VEGETATIVE FUNCTIONS OF PLANTS 
...--. 
FIG. 81. Sensitive plant (Mimosa pudica). B, normal position of foliage 
in light; A, position of foliage after the plant was slightly shaken. 
FIG. 82. -Oxalis bupleurijolia. p, Petiole; b, trifoliolate blade. At the 
left, leaflets in normal attitude in light; at the right, attitude of leaflets at 
night or after sudden shock. 
