Plah ML 



FlG. 25. Plant hairs (tricliomcs). 



Kjj;. A. Needle like triehome from the leaf of Geranium. (Pelargonium IIK/UIIKIH.S.) 



Fig. B. Stinging hair from the stem of Urtica diotoi. A, epidermis of the stem: 

 B, cortex; C, column of tissue supporting the hair; D, bull) >f the hair and con- 

 tained nucleus: E, slender taper! MSI cell of the tip of the hair; the walls are strong- 

 ly silicious and usually covered with fine transverse markings. (x">ii). 



Fiji- (!. Glandular hair from the leaf of (irranhnn. A, (jland at the apex: B, 

 epidermis of leaf; C, cells of the stalk; 1), cortical parenchyma. (.\200.) 



