Texnessee Flora. 161 



cently introduced in Nashville, and spreading rapidly. June, 



July- 



L. Scariola L. Prickly lettuce. Waste places. Nashville. 



Knoxville. Naturalized from Europe. 



L. sativa L. Garden lettuce, descending from the former , 

 Cultivated in many varieties. 



L. Canadensis L. Wild lettuce. Clearings and woodlands. 

 O. S. June. M. 



L. villosa Jacq. L. acuminata Gray. Blue lettuce. Thick- 

 ets. O. S. July-September. 



L. Floridana (L.) Gaertn. Rich woods. (J. S. July-Sep- 

 tember. 



L. spicata (Lam.) Hitchc. L. leucophaea A. Gray. River 

 bottoms. O. S. June-September. 



L. spicata integrifolia A. Gray. Highlands. June, July. 



L. hirsuta Miihl. Knoxville. L. T. Scribner. 



NOTHOCALAIS Greene. (Troximon Nutt.) 



Nothocalais cuspidata (Pursh.) Greene. Knoxville. Ruth. 



Troximon cuspidatum Nutt. 



SITILIAS Raf. (Pyrrhopappus DC.) 



Sitilias Caroliniana (Walt.) Raf. Pyrrhopappus Carolin- 

 ianus DC. East of Cleveland. Ducktown Road. April-July. 



HIERACIUM L. 



Hieracium venosum L. Rattlesnake weed. Drv woods. 

 O. S. May-October. 



H. Marianum Willd. Maryland hawk weed. Farmer Mt., 

 S. W. Va. J. K. Small. May- July. 



H. paniculatum L. Dry woodlands. O. S. July-Septem- 

 ber. 



H. scabrum Michx. Dry woods. O. S. June-September. 



H. longipilum Torr. W. Tenn. July. 



H. Gronovii L. Dry soil. Nashville. June, July. 



H. Scribneri Small. Lookout Mt. Legit E. L. Scribner. 

 Is perhaps H. Greenii, 



NABALUS Cass. (Prenanthes L.) 



Nabalus altissimus Hook. Prenanthes altissimus L. High- 

 lands. July-September. 



N. albus Hook. P. alba L. Rattlesnake root. Jackson, 

 W. Tenn. S. M. Bain. July. M. 



N. serpentarius (Pursh.) Hook. P. serpentaria Pursh. 

 Lion's foot. Barrens of Dickson County. August. M. 



