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BOTANY AND PHARMACOGNOSY. 



Fig. 287. A, Digitalis leaf: t, upper epidermis showing two non-glandular hairs 

 and one glandular hair; 2, lower epidermis showing stomata, four non-glandular hairs and 

 three types of glandular hairs. 



B, Hyoscyamus leaf: 1 

 dermis showing a stoma; 3- 

 calcium oxalate. 



, upper epidermis showing a stoma and hairs; z, under epi- 

 ■7, several forms of hairs; 8, two pollen grains; 9, prisms of 



C, Belladonna leaf: i, under epidermis showing two stoma+a and a single glandular 

 hair; 2, two non-glandular hairs; 3-5, several types of hairs; 6, a transverse section show- 

 ing lower epidermal cells and a parenchyma cell containing plastids; 7, fragment of 

 parenchyma showing a cell containing cryptocrystalline crystals of calcium oxalate; 8, 

 loose parenchyma showing two adjoining cells respectively containing a monoclinic prism 

 and a rosette aggregate of calcium oxalate; 9, fragment with two annular tracheae. 



D, Stramonium leaf: i, under epidermis showing four stomata; 2, transverse section 

 showing a stoma; 3, glandular hairs; 4, prickly non-glandular hair; 5, a pollen grain; 

 6, parenchyma cells containing rosette aggregates of calcium oxalate; 7, fragments with 

 tracheae and sclerenchymatic fibers; 8, long collenchymatic cells. — After Moeller. 



