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Transactions. 



rather, thin, rough cuticle. From the upper surface there is produced a 

 tomentum which is composed of very fine hairs. These hairs are 3-4-celled ; 

 the lowest cell has a cutinized wall. 



Fig. 14. — Gelmisia longifolia var. grocilenta. Transverse section of leaf passing 

 through midrib ( X 175). a, upper epidermis ; b, oil-drops ; c, xylem ; 

 d, phloem ; e, long multicellular hairs ; /, shorter, more slender hairs ; 

 g, aqueous tissue. 



The chlorenchyma is differentiated into palisade and spongy tissue. 

 The palisade tissue consists of one layer of large, thin-walled cells, which 

 contain numerous chloroplasts and also some large oil-globules. There are 

 small intercellular air-spaces in this tissue. 



