826 



SOLANACEAE 



Collinsonia 



50 



Map 1793 



Collinsonia canadensis L. 



6. Mentha gentilis L. This species has been reported from four 

 counties and since it is a frequent escape in other states, it is given a place 

 in our flora. It has been reported from Clark, Jefferson, and White 

 Counties. I have it from Decatur County. 



Nat. of Eu. ; N. S. to Iowa, southw. to N. C. and Tenn. 



7331. COLLINSONIA L. Horsebalm 



1. Collinsonia canadensis L. Citronella Horsebalm. Stoneroot. 

 Map 1793. Throughout the state in dry, rich woods although we have but 

 one record from the northwestern counties. The thickened, hard rootstock is 

 much used in medicine for kidney and urinary disorders. 



W. Que. to Wis., southw. to Fla., Mo., and Kans. 



7332. PERILLA L. 



1. Perilla frutescens (L.) Britt. var. crispa (Benth.) Deane. (Rho- 

 dora25:40. 1923.) Purple Perilla. Map 1794. Sparingly escaped from 

 gardens. We have had only four county records. I noted it covering at 

 least half an acre in an open woods in Perry County. In a sandy woods 

 about 3 miles northwest of Bicknell, in Knox County, it was a common 

 weed over the greater part of a 20 acre woods. This woods had been 

 heavily grazed by hogs. It is to be noted that even hogs do not disturb it 

 and if it once gets started it may become a permanent plant. It is an 

 annual which is frequently grown as a border plant. I have grown it for 

 years and have allowed a few plants to seed themselves annually but have 

 never noted seedlings except in the flower beds. 



Nat. of the Himalayas, Burma, China, and Japan ; Conn, to Mo., southw. 

 to Fla. and Tex. 



256. SOLANACEAE Pers. Nightshade Family 



Flowers less than 3.5 cm long; fruit a fleshy or dry berry. 



Plants woody; trailing or climbing shrubs, with or without thorns; fruit a dry 

 berry 7379. Lycium, p. 827. 



