The Pines of Australia. 



Group II. 



Cross Section through decxirrent leaves and branchlet of C. calcaraia. 



X 73. Sclerenchymatous cells are seen at the outer edge of the phloem 



of the leaf bundle. Stained with hiematoxylin and safranin. 



Cross Section through the ventral axis (branchlet) and attached portions 

 of decurrent leaves of C. calcarata. x 150. Sclerenchymatous cells of 

 the complete section above are here more distinctly brought into vision. 

 The cells with the small circles (pits) in them, mark the transfusion 

 tissue. Stained with haematoxylin and safranin. 



Leaf anatomy illustrating the arrangement of species in Table,- 



of the Callitris. 



-The probable evolution 



