162 Tennessee Flora. 



N. serpentarius var. barbatus Gray. Roane Alt. Chicker- 

 ing. r>i^- 'riuindcrhead. July, August. 



N. asper (.Michx.) T. & G. 15arrens. O. S. July, August. 

 N. crepidineus (Michx.) DC. bottoms. O. S. August. 



AAIBROSIACE.E Reichb. 

 AMBROSIA L. 



Ambrosia bidentata Micx. \\'aste grounds at Brownsville, 

 \\'. Tenn. August. 



A. trifida L. Horse weed. Along water courses. O. S. 

 grifolia T. & G. With the former. 



A. artemisiaefolia L. Rag weed. The most aliundant weed 

 in the State. August. 



A. psilostachya DC. Knoxville. A. Ruth. July-October. 



XANTHIUM L. 



Xanthium spinosum L. Burr weed. In towns, along rail- 

 road tracks. O. S. September. O. 



X. Canadense Mill. American cockleburr. O. S. July- 

 October. 



X. strumaricum L. Waste places. With the former. July- 

 September. 



COMPOSITE Adans. 



VERNONIA Schreb. 



Vernonia Noveboracensis (L.) Willd.ffllron weed. Dry 

 soil. O. S. July-October. 



V. Baldwinii Torr. W. Tenn. August. 



V. gigantea (Walt.) Britton. V. altissima Nutt. Tall iron 

 weeri. Moist soil. O. S. 



V. fasciculata Michx. With the former. O. S. July-Sep- 

 tember. M. 



ELEPHANTOPUS L. 



Elephantopus Carolinianus Willd. Elephant's foot. Dry 

 woods. M. Tenn. August-September. 31. 



E. tomentosus L. Cumberland and Alleghany ]\Its. Au- 

 gust-September. .1/. 



EUPATORIUM L. 



Eupatorium capillifolium (Lam.) Smal. E. foeniculaceum 

 Willd. Dog fennel. Eawrenceburg. E. Tenn. 



E. purpureum L. Gravel root. Moist soils. O. S. Au- 

 gust, September. U. 



E. serotinum Michx. Thoroughwort. Streets of Nashville. 

 O. S. September-November. 



