The Pines of Australia. 



Figure 273. — Transverse stction through the median portion of a phylio- 

 clade, 'showing the number of bundles composing the 

 midrib surrounded by five oil cavities of var\*ing sizes. The 

 rest of the tissue partakes of the character of an ordinary 

 leaf. Stained with hcematoxylin and safranin. PhyUo- 

 cladus rhomboidaliSy x So. 



Figure 275.— Transverse section through the median area of a phyUocIade, 

 showing cluster of bundles in central axis and one on left 

 side with a lateral orientation. An oil cavity with secretory 

 cells occurs near each phloem of the leaf bundle. The tw-o 

 kinds of parenchyma are well defined, — the palisade being 

 more pronounced on the assimilatory or upper surface of 

 the phyllodc. Several slomata backed by air cavities can 

 also be seen. Stained with haematosyUn. Phyllocladus 

 rhoniboidalis, x 70. 



