HENBANE 



597 



'embryo embedded in the endosperm; odor distinct; taste bitter and 

 somewhat acrid. 



Inner Structure. (Fig. 262.) Somewhat resembling in structure 

 belladonna leaves, but the crystal layer contains monoclinic prisms 

 of calcium oxalate, the hairs are different as well as more abundant, 

 and the epidermal cells are but slightly undulate. 



Powder. (Fig. 262.) Grayish green or dark green; calcium 

 oxalate in single or twin monoclinic prisms from 0.010 to 0.025 

 mm. in diameter, occasionally in rosette-shaped crystals; non- 



FIG. 256. Hyoscyamus niger, biennial. Portion of a plot showing rosette 

 character of the leaves and their long petioles. After Newcomb. 



glandular hairs, unicellular or uniseriate, consisting of 2 to 10 cells; 

 glandular hairs, either uniseriate or having a 1- to 4-celled stalk and 

 a 6- to 8- or more celled head; fragments of midrib showing strong 

 development of collenchyma with large intercellular -spaces; frag- 

 ments of epidermis having broadly elliptical stomata, 0.030 to 0.035 

 mm. in length, having 3 to 4 neighboring cells; fragments of trachese 

 with wood fibers, having thin, porous walls and showing little or no 

 lignification. 



