LOBELIA 



663 



FIG. 292. 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 epi- 

 dermal cells (e), palisade cells (p), tracheae (t) loose parenchyma (m) and 

 lower epidermis (i) ; C, surface section of lower epidermis 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); 7, longi- 

 tudinal section of stamen showing the hairy summit; J, hair from stamen; 

 K, pollen grain; L, hair from calyx; M, seed with reticulate seed-coat; N t 

 upper epidermis of corolla showing spherite crystals of a carbohydrate. 



