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BOTANY AND PHARMACOGNOSY. 



B 



^ rt^ 









4^ G * 



Fig. 287. A, Digitalis; B, Hyoscyamus; C, Belladonna; D, Stramonium. a, upper epi- 

 dermis; b, lower epidermis; c, non-glandular hairs (which in stramonium are tuberculate); 

 d, glandular hairs; e, calcium oxalate crystals; f . fragments of xylem showing trachea 

 with bordered pores (s), reticulate markings (r), simple pores (p), spiral thickening (1,) and 

 wood fibers (w); g, bast fibers, which together with wood fibers are wanting in digitalis. 



