40 



18. Ambrosia, Tourn. 



trifida, L. 



Moist places along Brandywine and elsewhere. Fre- 

 quent. Aug. 

 artemisisefolia, L. (Bitter-weed. Bag-weed.) 



Stubble-fields, pastures, and waste places. Common. 

 Aug. 



19. Xanthium, Tourn. 



strumarium, L. (Cockle-bur.) 



Barnyards and waste places. Common. Aug. 

 spinosum, L. (Thorny Clotweed.) 



Streets of Wilmington, New Castle, &c. Frequent. 

 Sept. 



20. Eclipta, L. 



prociimbens, Michx. 



Wet banks of race near Tatnall & Lea's Mill. Rare, 

 Aug. 



21. Heliopsis, Pers. 



kevis, Pers. (False Sunflower.) 



Low grounds along Brandywine and elsewhere. Fre- 

 quent. July. 



22. Rudbeckia, L. 



laciniata, L. (Cone Flower.) 



Low grounds j Brandywine, &c. Frequent. July. 

 fulgida, Ait. 



Old fields N. of C. Howland's and elsewhere. Fre- 

 quent. Aug. 

 hlrta, L. 



Fields, &c. ; Dixon's. Not common. July. 

 28. Helianthus, L. 



giganteus, L. (Wild Sunflower.) 



Borders of thickets and swamps; Hand's and else- 

 where. Common. Aug. 

 strumosus, L. 



Banks of streams and borders of thickets. Frequent, 

 Aug. 

 divaricatus, L. 



Dry hillsides above Allapokas Creek, and frequent 

 elsewhere. July. 



