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Transactions. 



' Figs. 25 and 26 show tlie surface view of the upper and lower faces of 

 the leaf. From these it will be seen (1) that the glandular hairs are much 

 more frequent on the upper surface, and (2) that most of the multicellular 

 hairs of the lower epidermis are situated over the vascular bundles. This 

 would suggest that they are for water-absorption. 



Fig. 28. — Senecio bellidioicles. Transverse section of scape (x 175). a, multicellular 

 hair ; b, glandular hair ; c, chlorenchyma ; d, lignified tissue ; e, vascular 

 bundle ; /, pith. 



Scape (figs. 27 and 28). — The structure of the scape is shown schematic- 

 ally in fig. 27 and in detail in fig. 28. 



The epidermis consists of fairly large cells which have thickened walls. 

 A thin, ridged cuticle is present. Stomata are present, but they are not 

 numerous. They are of the same type as those in the leaf. There are 

 two kinds of hairs — (1) glandular ; (2) hairs like those described for the 

 upper epidermis, but the large cell at the base of the elongated cell is not 

 present. 



