148 Tennessee Floea, 



M. aquatica L. Water mint, Knoxville. A. Ruth. Au- 

 gust-October. 



M. arvensis L. Field mint. Waste places. Introduced. 

 July-September. 



M. sativa L. .Whorled mint. Knoxville. A. Ruth. Sep- 

 tember, October. 



M. Canadensis L. American wild mint. Margin of ponds. 

 O. S. July-October. 



COLLINSONIA L. 



Collinsonia Canadensis L.', Horse balm. Rich woodlands. 

 Frequent in E. Tenn. July-October. M. 



C. punctata Ell. Cumberland Mts. Harpeth hills, along 

 Hillsborb Pike. July. ' • 



C. yerticillata Baldw. Lookout Mt. W. M. Canby. Knox 

 and Loudon Counties. A. Ruth. M. 



PERILLA Ard. 



Perilla frutescens (L.) Britton. P. ocymoides L. Native 

 of India. Spreading in M. Tenn. Growing in old farm lands 

 in big patches. July-October. 



SOLANACEJE Pers. 

 PHYSALODES Bcehm. (Nicandra Adans.) 



Physalodes Physalodes (L.) Britton. Nicandra Physa- 

 lodes Gaertn. Apple of Peru. In clearings, or a weed in gar- 

 dens or fields. Q. S. July-September. 



PHYSALIS L. 



Physalis pubescens L. . Sandy soil. Ground cherry. O. S. 

 July-September. 



P. angulata L. Copses, in rich soil. O. S; July-Septem- 

 ber. 



P. Philadelphica Lam. Fields and gardens. O. S. July. 



P. lanceolata Michx. Prairie ground cherry. Uplands. 

 Cumberland Mts. ' July, August. 



P. Virginiana Mill. Cedar glades and woods. O. S. July- 

 September. 



SOLANUM L. 



Solanum nigrum L. Black nightshade. Waste ground. 

 O. S. July-October. M. 



S. Carolinense L. Horse nettle. Fields and waste grounds. 

 O. S. May-September. M. 



S. rostratum Dunal. Sand bur. Adventive from the West. 



