86 



TYPES OF HAIRS 



[CH. 



Nevertheless, in the typical case a hair results from 

 the bulging out of a single epidermal cell, the pro- 

 tuberance then growing forward as a closed tube, which 



Fig. 52. Types of hairs, a woolly hairs of Gnaphalium ; c silky 

 hairs of Convolvulus ; b velvety hairs of Gloxinia ; e woolly hairs of 

 Centaurea-, f stellate hairs of Alyssum; g stellate stalked scales of Koniga- 

 h the same in section. 



