CHAPTER IV. — PLANT-HAIRS OR TRICHOMES. 



45 



Fig. 159, and the stellate hairs of Shepherdia, Fig. 152 ; or, as 

 in most prickles, the hairs of Sundew and of Rhododendron, 



Fig. 148. Fig. 149. Fig. 150. Fig. 151. Fig. 152. 



Fig. 148. — Moniliform hair from the stamen of Tradescantia. 



Fig. 149 

 Fig. 150 

 Fig. 151 

 Fig. 152 



Simple multicellular hair from the leaf of Ageratum. 

 — Moniliform hair of Mirabilis Jalapa. 



— Multicellular hair, having a gland at its tip, from the stem of Petunia. 

 — Flattened hair from the leaf of Shepherdia Canadensis. AH magnified. 



Fig. 158, they may consist of solid masses of cells. Multicellu- 

 lar hairs may also be simple, as in the Squash, Fig. 153, or branch- 

 ing as in the Mullein, Fig. 154. Hairs, as we have seen, not 



\ 



Fig. 155. 



Fig. 1.53. Fig. 154. 



. Fig. 153. — Different forms of hairs found on the stem of the Squash. 

 Fig. 154. — Branching multicellular hair of Mullein. 



Fig. 155. — Multicellular glandular hair from the stem of the house Geranium. All 

 magnified. 



