POWDERED DRUGS AND FOODS. 



717 



tion cells with siiberized walls ; oil globules numerous ; fragments 

 of powder becoming wine-colored with sulphuric acid (Fig. 334). 

 187. DELPHINIUM. Grayish-brown or light brown; stone 

 cells of outer epidermis radially elongated, with thick w^alls and 

 simple pores resembling those of staphisagria ; a layer of pigment 

 cells ; fixed oil, and aleurone grains. 



Fig. 313. Vanilla: S, fragments of seeds showing characteristic stone cells; B, 

 parenchyma cells with narrow-elongated simple pores; P, parenchyma containing oil 

 globules; T, tracheae; L, lignified cells with simple pores; Ca, raphides of calcium oxalate; 

 H, papilte-like hairs from the inner surface of the pericarp which are occasionally seen 

 massed together. 



188. STRAMONII SEMEN. Brownish-black or grayish- 



black (Fig. 122, 5) ; epidermal cells with thick mucilaginous 

 outer walls, a small lumen and dark brown contents. Beneath the 

 epidemiis is a layer of thick-walled, nearly colorless cells with 

 distinct, crescent-shaped lamell?e in the radial walls and reticulate 

 pores. The cells of the endosperm contain considerable oil and 

 more or less numerous aleurone grains, the latter having i or 2 

 crystalloids and a number of globoids. 



