32: 



PLANT LIFE. 



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



fingers, as from the surface 

 ol fruits, such as plums or 

 grapes, the leaf of cab- 

 bage, or the stalk of sugar- 

 cane (fig. 366). The in- 

 terior la)-ers of the wall of 

 the epidermis are some- 

 times con\'erted into mu- 

 cilage, which retards the 

 evaporation of water. 

 The sinking of the sto- 

 jr,(j 353 mata below the general 





KlG. 364. 



P'iG. 363. — Stellate hairs ol Draba 

 Thomasii, seen from above. 

 Magnified about 50 diam. — 

 After Kemer. 



.'If.. 364. — T-shaped hairs nf Ar- 

 temisia imitcilina. Magnified 

 ■ibout 50 diam. — After Kerner. 



l'"[(, 3h5, — Shieldlike scalus of an 

 .licasLcr ( /■:/,ra,i;>iNs d i/x/'sfi- 

 /oi/a), seen from ab(i\e. Mag- 

 nified about 50 diam.— Alter 

 Rerner. 



level (lig. 367), thcii- arran-cnieiU in pits (fiij;. 36S) or in 

 grooves (fig. 357), and llicir restriclion to the under side of 

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



