Betts. — Autecology of Plants of Peridotiie Belt, Nelson. 307 



Section through the Lamina in the Region of a Prominent Vein (fig. 37). — 

 Jn these veins there is a large, more or less T-shaped mass of sclerenchyma 

 surrounding the vascular bundle. As in the niidrih, these cells are smaller 

 on the under side than on the upper side, but here those on the upper 

 surface are much larger than those above the midrib. 



Fig. 37. — Astdia montana. Section through one of large veins (X 175). a, tomentum • 

 b, upper epidermis ; c, aqueous tissue ; d, mesophyll ; e, stoma ; /, hair ; 

 g, stereome. 



Between the sclerenchyma and the upper epidermis there is a hypoderma 

 of aqueous tissue consisting of more or less oval cells. Between the 

 sclerenchyma and the lower epidermis this layer is only one cell thick. 



