307 



The Pines of Australia. 



Figure 217 — Transverse section of leaf through attached portion to 

 branchlet. One comparatively large and one small nil 

 cavity are sectioned. Below the larger cavity is the 

 leaf bundle, with its lateral transfusion tissue and 

 endodermal cells. Athroia\is selagUwldcs^ x 30. 



Figure 218 — Transverse section through free portion of leaf. Assimila- 

 tory or inner surface denoted by letter S. A. sdaginoiiUs, 



Figure 219— Similar to Figure 218. Among the dorsal sponcry mesophyll 

 are some sclerenchymatous cells cut longitudinally. A 

 sclagmoides, x 30. 



Figure 220. — Transverse section through leaf showing three oil cavities 

 between the dorsal or assimilatory surface and the bundle 

 with its accompanying laterally-extending transfusion tissue. 

 A . selaginoideSy x 30. 



Sections of leaves of Athrotaxis selaginoides, Don, 



