The Pines of Australia. 



Z^l 



Figure 259, — Longitudinal section throagh bark. A. BidwiUi., x So. 



Figure 260. — Longitudinal section through bark, showing the rigidity of 

 bast fibres, for in tins instance four fibres remain standing 

 after the intervening tissue has been removed. The median 

 channel is seen in the two centre fibres. A. B:dieilli,x no. 



Portion of a bast fibre showing crystals on the outer surface. A. BidwiUi. 

 X350. 



Bast fibre on left of picture showing similar crystals. Callitris robwila, 

 X 500. 



Sections of bark of Araucaria BidwiUi, Hook, 



