174 



The Pine? oe Australia 



i 



Fl^re 107, "Transverse section throush branchlel and dccurrenl leaves, 

 frt^ of oil caxitics. The spongy tissue of the mesophyU is 

 proportionately large, and the hvpodermal cell? of the as- 

 similatory surface arc doubly packed C intratropica, x So. 



Figure 108. — Transverse section through branchlet and decurrent leaves, 

 free of oil cavities. The pith and medullary rays of the 

 central axis and a few cells round the phloem are darkened 

 by the presence of th? manganese compound; amongst the 

 :adodermaI cells are the transfusion cells denoted by the 

 minute circles in them. C. intratropica, x 90. 



FlfBrt 109. — TraniVfTw s«:tion through central axi> ol Figure 108. 

 Thrrr-Iraf bundlr^ ar** ;ilv> included, one at the top and 

 onr at the lowrr \ftt and right hand side* of the central 

 bundles. The brown manganese compound i^ indir.itcd 

 by the bUck patches. C, intratropica, x 200. 



Figure 110. 



-Transverse section through branchlct and decurrent leaves, 

 with an oil cavity in each leaf. C. intratropica, x 90. 



