502 CLASSIF1CA TION. 



The chicory family (Cichoriaceae) includes the chicory or 

 succory (Cichorium intybus, known also as blue-sailors), the 

 oyster-plant or salsify (Tragopogon porrif olius) , the dandelion 

 (Taraxacum taraxacum =T. densleonis), the lettuce (Lactuca), 

 the hawkweed (Hieraceum), and others. 



The ragweed family (Ambrosiaceae) includes the ragweeds 

 (Ambrosia), the cockle-bur (Xanthium), and others. 



The thistle family (Compositae) includes the thistle (Carduus), 

 asters (Aster), goldenrods (Solidago), sunflowers (Helianthus), 

 eupatoriums or joepye- weeds, thorough worts (Eupatorium), 

 cone-flowers or black-eyed Susans (Rudbeckia), tickseed (Core- 

 opsis), bur-marigold or beggar-ticks or devil's-bootjack (Bidens), 

 chrysanthemums, etc. 



