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 bupleurifolia. 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. 



