OTHER YELLOW FALL FLOWERS 



65 



Cup-plant. — The cup-plant (Silphium perfoliatum) , also 

 called rosin weed, is a common roadside plant in the Middle West. 

 The illustrations showing the flowers and also the plant give a 



Fig. 31. — Blossoms of the cup-plant. 



good idea of its appearance. By looking closely at Figs. 30 and 

 31 it will be seen that the stem is square, and that the leaves 

 are grown together at the base, thus making a cup around the 

 stem, from which the name is derived. These plants are abund- 



