144 



BOTANY AND PHARMACOGNOSY. 



tion to the insects which visit them. The insects are, however, 

 probably more attracted by the odor and food products which 

 thev obtain, such as the nectar. The nectar is secret .^d bv 



Fig. 88. A, flowering ami fruiting plant of peanut (Aracliis hypogcva). After fertiliza- 

 tion the carpophore (or stalk between calyx and ovary) grows in length, sometimes 4 to 8 

 cm., and curves downward penetrating the soil (el), after which the fruit develops. B. 

 longitudinal section through the papilionaceous (bilateral) flower; C. longitudinal section 

 through the pod (peanut). After Taubert. 



