162 Tennessee Ploea. 



N: serpentarius v^r. barbatus Gray. Roane Mt. Chicker- 

 ing. Big Thunderhead. July, August. 



N. asper (Michx.) T. & G. Barrens. O. S.' July, August. 

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



AMBROSIACE^ Reichb. 

 AMBROSIA L. 



Ambrosia bidentata Micx. Waste groiinds' at Brownsville, 

 W. Tehn. August. 



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



A. trifida integrifolia T. & G. With the former. 



A. artemisjaefolia L. Rag weed. The most abundant 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. 0. 



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

 October. 



X. strumari^um 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 T'orr. W. Tfenn. August. 



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

 weed.' 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. M. 



E. tomentosus L. Cumberland and Alleghany Mts. Au- 

 gust-September. M. 



EUPATORIUM L. 



Eiipatoriiim capillifolium (Lam.) Smal. E. fceniculaceum 

 Willd. Dog fennel. Lawrenceburg. E. Tenn. 



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

 gust, September. M. 



E. serotinum: Michx. Thorbughwort. Streets of Nashville. 

 O. S. September-November. 



