638 



BOTANY OF CROP PLANTS 



Geographical Distribution, and Economic Uses. — Endive 

 is a native of India. It is cultivated to a great extent in 

 the gardens of European countries and to some extent in 



Fig. 263. — Tubers of Jerusalem artichoke (Helianthus tuberosum). {After 



Vilmorin.) 



the United States. The best-known variety grown here is 

 the Green Curled. The plant is cultivate^ for the young 

 basal leaves which are blanched and used as a salad. 



