The Pines of Australia 



Figure 234. — Transverse section through a median portion of a leaf 

 with one oil gland towards the top, and the middle bundle 

 a little distance below surrounded by endodermal cells. 

 A small cluster of sclerenchymatous cells occurs on the outer 

 edge of the phloem (dark brown). Two comparatively 

 large transfusion cells (stained purple) are sectioned on 

 each side of the oil cavity. Stained with haematoxylin 

 and safranin. Arancarta Cunninghamii, x no. 



Figure 236. — A transverse section through an edge of a leaf, showing 

 the cell structure at that particular part. The epidermal 

 cells are in a single row on both surfaces, whilst the hypo- 

 dermal cells (ycilow) are larger and more numerous on 

 the dorsal surface. Two stomata are sectioned in the 

 ventral surface, the air cavities here separating the palisade 

 cells (red),— which are well packed below the hypodermal 

 cells of the dorsal side. The transfusion cells (purple) can 

 be detected by the cross bars. Stained with haematoxylin 

 and safranin. Araucaria Cunninghamii, x 378. 



