LECT. Xi.] CAUIINAR AND FOLIAR APPENDAGES. 645 



posed places: the Turk's-cap Lily, Lilium Mar- 

 tagon, is found covered with rough hairs, or 

 hirsute, in the woods, and yet is smooth when 

 cultivated in gardens ; and some of the Mint tribe, 

 as for instance Mentha hirsuta^ naturally hairy, 

 are occasionally found smooth; and yet, "if 

 " transplanted soon resume their former habits*." 

 Notwithstanding these changes, and although Lin- 

 nseus regards distinctions founded on pubescence 

 as ridiculous-}-, yet systematic Botanists have suc- 

 cessfully founded specific distinctions on the di- 

 rection of the pubescence; for, as it has been 

 justly remarked, although " the degree of pubes- 

 " cence varies from culture, and even its struc- 

 " ture be changeable," yet " its direction is as 

 " little liable to exception as any character that 

 "vegetables present^:" and, consequently, in 

 treating of the hairs and bristles on plants, their 

 direction is necessary to be noticed. When the hairs 

 are placed in a line on two sides only of a stem, 

 the pubescence is said to be bifarious (brfariam 

 pilosus) ; as in Germander, Veronica Chcemcedrys; 

 its direction is horizontal (horizontalis) on the 

 flower-cup in Corn Mint, Mentha arvensis; and 

 on the stems of the common Red Poppy, Papaver 

 Rhdeas ; and patent or spreading (patens) on the 



* Smith's Introduction, p 228. J Ibid. p. 229. 



f *' Pubescentia ludicra est differentia, cum cultura saepius 

 deponantur." Phil. Bot. 272. 



TT3 



