634 



BOTANY AND PHARMACOGNOSY. 



in addition a fixed oil which when pure is bland, non-acrid and 

 somewhat resembles that of linseed. As it is usually seen on the 



Fig. 272. Indian tobacco {Lobelia inflata): A, upper portion of shoot showing the 

 dentate-denticulate leaves and the inflated capsules which develop soon after fertilization; 

 B, transverse section of leaf showing the large epidermal cells (e), palisade cells (p), tra- 

 chea? (t), loose parenchyma (m) and lower epidermis (i); C, surface section of lower epi- 

 dermis showing 3 elliptical stomata; D, surface section of upper epidermis; E, one of the 

 hairs which are found on the stems and leaves; F, wood fibers of the stem; G, a flower; 

 H, longitudinal section of flower showing the ovary with ovules (o), style (s), hairy bifid 

 stigma (t), united stamens (a), corolla (p) and calyx (c); I, longitudinal section of stamen 

 showing the hairy apex; J, hair from stamen; K, pollen grain; L, hair from calyx; M, 

 seed with reticulate seed-coat; N, upper epidermis of corolla showing spherite crystals of a 

 carbohydrate. 



market it is of a greenish color and quite acrid and is said to con- 

 tain all the active principles of the drug. 



