724 



A TEXT-BOOK OF BOTANY. 



Fig. 399. A flowering specimen of the Purple Cone-flower {Brauneria angustifolia), 

 showing the 3-nerved lanceolate leaves and 2 of the flower heads with the characteristic 

 long spreading rays. — After Newcomb. 



is a narcotic poison. Para cress (Spilanthes oleracea), of trop- 

 ical America, contains a soft pungent resin and a crystallizable 

 principle, spilanthin. The common white daisy {Chrysanthemum 



