450 GENERAL MORPHOLOGY OF PLANTS 



(Helianthus) , eupatoriums or joepye-weeds, thorough worts (Eupa- 

 torium), coneflowers or black-eyed Susans (Rudbeckia), tickseed 

 (Coreopsis), burmarigold or beggar-ticks or devil's-bootjack 

 (Bidens), chrysanthemums, etc. One of the food plants is the 

 Jerusalem artichoke (Helianthus tuberosus), a native of Canada 

 and the upper valley of the Mississippi, cultivated for the fleshy 

 tubers or root-stocks, which are sweet and mealy. It was for- 

 merly grown by the Indians. In the globe artichoke (Cynara 

 scolymus), extensively cultivated in Europe, the fleshy bracts of 

 the flower head and the young portion of the receptacle and 

 flowers are used for food. 



