176 



BOTANY AND PHARAIACOGNOSY. 



A. Cell-content Mucilage: Tuber of Orchis sp. (salep) ; 

 rhizome of Agropyron re pens; bulb of Urginea maritiiiia; bulb of 

 Allium sp. (onion, garlic) ; stem, leaf and elements of flower, 





Fk;. oy- Cell-wall mucilage. A, transverse section of seed-coat of flaxseed treated 

 with water, showing the swelling of the mucilaginous layer beneath the cutin; B, section 

 of Altha;a root showing three large mucilage-cells; C, transverse section of elm bark show- 

 ing four large mucilage-cells. 



excepting stamens, of F/o/a tricolor; flower-stalks of Hageiiia 

 abyssiiiiea : pulp of fruit of Miisa paradisiaca (banana) ; succulent 

 plants, as aluc, etc. (See Fig. 98.) 



