76 TENNESSEE FLORA. 



P. Persicaria L. Waste grounds, near water, O. S. June- 

 July. 



P. Hydropiper L. Ditches, etc. Common in streets, etc. 

 August-yeptember. 



P. acre H. B. K. Streets of Nashville, etc. July, 



P. hydropiperoides Michx. River swamps. In water. Com- 

 mon. August-September. 



P. Muhlenbei'^ii Watson. (P. amphibium, var. terredre Gray). 

 River swamps; wild goose pond near Mitchellville. August. 



P. Virgiuianum L. Thickets, rich soil. July-August. 



P. aviculare L. Yards and streets everywhere. June-July. 



P. erectuin L. (P. aviculare, var. erectum Roth.) In com- 

 pany with the former, on manured grounds. June-July. 



P. tenue Michx. Cumberland plateau, Sewanee. July. 



P. arifolium L. Cumberland plateau. September. 



P. sagittatam L. Swampy grounds O. S. July-October. 



P. Convolvulus L. Low, damp grounds near Nashville. Sep- 

 tember. 



P. dumetorum L., var. scandens Gray. O. S. August-Sep- 

 tember. 



Fagopyrum esculentum Moench. Sparingly cultivated and 

 escaped to fence rows. Cumberland Mts. July -August. 



Brunnicliia cirrhosa Banks. Grounds of Lunatic Asylum, near 

 Nashville. West Tenn. July-October. 



LAURACE.E. 



Sassafras officinale Nees. O. S. In the river islands it 

 grows to large dimensions. April. 



Lindera Benzoin Meissner. O. S. In rich soil. March- 

 April. 



THYMELEACE^. 



Dirca palustris h. Mountain bogs. Cumberland Mts. April. 



SANTALACE^. 



Gomandra umhellata Nutt. In damp soil, oak barrens. Tul- 

 lahoma. May. 



