3 22 



PLANT LIFE. 



--:' : \ ' 



bluish-white powder, which can be readily wiped off with the 



ringers, as from the surface 

 of fruits, such as plums or 

 grapes, the leaf of cab- 

 bage, or the stalk of sugar- 

 cane (fig. 366). The in- 

 ^ terior layers of the wall 6T 

 ■ the epidermis are some- 

 - — ttmeT'coivverted into rhu- 

 ~~cTTage, which retards the 

 evaporation ~rjf — -avuU£.i\__ 

 ^J£he__ sinking of" the sto- 

 mata below the general 



Fig. 363. 



wr 





Fig. 363.- Stellate hairs <>f /h<i/:i 

 Thomasii, seen from above. 

 Magnified about 50 <li. 



After kerner. 



Fig. 364. — T-shaped hairs of Ar- 

 temisia mutellina. Magnified 

 about 50 diam.— After Kerner. 



1, . 565 Shieldlike si .<l<--s of an 

 1 1 /■:/,., ix "'>■■■ ■• 



folia), seen from above. Mag- 

 nified about ;•> diam.— After 

 Kerner. 



level (fig. 367), their arrangement in pits (fig. 368) or in 

 "groTTves (fig. 357), and their restriction to the under side of 

 the leaf (fig. 359) may be looked upon as further epidermal 



