COMPOUND FLOWERS. 



357 



smaller heads of flowers, 3-parted leaves, and by having 

 2 3 bristles on the fruit. Fl. July September. 

 Annual. 



BIDENS TRiPARTfTA (Trifid Bur- Marigold). 



23. EUPATORIUM (Hemp-Agrimony). 



1. E. canndbinum (Common Hemp- Agrimony). 

 The only British species. Moist shady places ; com- 

 mon. A tall downy plant, 36 feet high, with a red- 

 dish stem, 3 5 parted leaves, and terminal corymbs 



