The Pines of Australia. 



M5 



Figure 90. — Longitudinal section of inner bark. The light spaces are 

 oleo-resin cavities. The thin parallel lines from top to 

 bottom of the picture are the bast fibres; and rays ara 

 seen extending from left to right. C. glaitca, x 43. 



Figure 91. — Longitudinal section of outer bark. The dark patches are 

 the brown manganese compound of the cells. C. glauca, 

 X 43- 



Figure 92. — Transverse section of inner bark. Nine oleo-resin cavities 

 with their secretory cells are shown. The dark patches 

 denote the presence of the manganese compound. C. 

 glauca, X So. 



K 



Sections of bark of 0. glauca, R.Br. 



