76 TENNESSEE FLORA. 



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

 July. 



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

 August-September. 



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



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

 mon. August-September. 



P. 3Iuhleiiber^ii Watson. (P. amphibium, var. terrestre Gray). 

 River swamps ; wild goose pond near Mitchellville. August. 



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



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



P. erectiiin L. (P. avieulare, var. ereduni Roth.) In com- 

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



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



P. arifoliura L. Cumberland plateau. September. 



P. sagittatara 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. 



Fa^opyrum 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^. 



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^. 



Dircapalustrish. Mountain bogs. Cumberland Mts. April. 



SANTALACE^. 



Comandra umbellata Nutt. In damp soil, oak Taarrens. Tul- 

 lahoma. May. 



