28 



EPIDERMAL APPENDAGES. HAIRS. 



the hairs of the Mallow tribe, and is well seen in those of Deutzia 

 scabra. When stellate hairs are placed closely together, so as to form a 



sort of membranous expansion (fig. 83), a scale or scurf is produced. 

 To such expansions of the epidermis the name lepis (xez-*?. a scale), 

 is applied, and the surface is said to be lepidote. These scales have 

 sometimes a beautiful silvery appearance, as in Elseagnus. Sur- 

 rounding the base of the leaves of Ferns, a brown chaffy substance 



Fig. 77. Young root of Madder, showing cellular processes, hhh, equivalent to hairs, e. The 

 epidermal cells which are not elongated. 



Fig. 78. Hairs formed by single cells of the epidermis, e. a, Simple hair. 6, Bifurcated hair 

 of Slsymbrium Sophia, c, Branched hair of Arabis alpina. 



Figs. 79 82. Compound hairs formed by the union of several cells, e, Epidermis, 79. MoniU- 

 form hair, from Lychnis chalcedonica. 80. Partitioned, unbranched hair, from stem of Bryonia 

 alba. 81. Partitioned, branched hair, from flower of Nicandra anomala. 82. Stellate, a star-like 

 hair, from leaf of Althaea rosea. 



