309 



The Pines oe Australia. 



Figure 221. — Transverse section through a leaf. The concave areas mark 

 the transpiratory or the inner surface of the leaves. A. 

 stiaginoides, x 30. 



—Similar to Figure 221, but cut nearer the apex. Transpira- 

 tory area marked by letter S. In the ventral mesophvil are 

 seen some stone cells cut transversely. The endodermal 

 cells are clearly seen surrounding the bundle and oil cavity. 

 A. selaginoides, x 40. 



Figure 223. — Transverse section through the edge of a leaf. A portion 

 ot the transpiratory surface extends half across the bottom 

 edge. The transpiratory surface extends around the edge 

 and onwards, and is backed by a regular row ot hypoderraal 

 cells. Cross sections ot sclerenchymatous cells are seen 

 amongst the spongy mesophyll. A. selaginoides, x 75. 



Sections of leaves of Athrotaxis selaginoides, Don. 



