The Pines of Australia. 



297 



Figure 212 — Radial section through bark. Although a low magnification 

 the sieve tubes with the accomoanying sieve plates can 

 fairly well be seen with the empty parencyhraatous vessels 

 between, each. A. pyramidahs, x 76. 



Figure 213 — -Transverse section through the outer bark: two oleo-resin 

 cavities are in the field of vision, the displacement of the 

 contiguous cells showing the lysigenous channel of these. 

 The broken parallel lines are the bast fibres, whilst the 

 light streak across the picture is a periderne layer. A. 

 pyramidaliSj x 60. 



Figure 214 - 



-Transverse section showing greater field of vision than 

 Figure 213. A. pyramidalis, x 60. 



Figure 215 — A higher magnification of the inner bark than shown in 

 Figure 213. The concentric bands ot bast fibres run across 

 the figure from left to right in dark lines. The lacuna on 

 left of the picture is part of an oleo-resin cavity. A. 

 pyrajHidalis, x 160. 



Sections of bark of Actinostrobus pyramidalis, Miq. 



