CELL-CONTENTS AND FORMS OF CELLS. 285 



These may consist of one or more series of cells, separated by a 

 columnar cell. 3. Shaggy hairs (Fig. 153, G), in which the 

 epidermal layer of the column of cells is modified to papillae 



PIG. 151. Forms of non-glandular hairs: A, hair from the epidermis of strophanthus; 



B, a hair from the capsule of Mallotus philippinensis (found in the drug known as kamala) ; 



C, hairs from the leaves and bracts of cannabis indica, two of them containing cystoliths 

 of calcium carbonate; D, a hair from the under surface of the leaf of senna; E, hairs from 

 leaf of digitalis; F, two forms of hairs from sage leaf; G, two forms of hairs from the leaves 

 of wormwood (Artemisia Absinthium): a T-shaped non-glandular hair and a short glandular 

 hair. 



which are directed upwards, giving the surface of the plant the 

 appearance of being covered with rough hairs or wool. 



Non-glandular hairs occur on a large number of plants. They 



