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II. SYSTEMATIC. 



This tree averages about 60 feet high, with the usual dark, hard, compact 

 bark occurring on Callitris trees. Decurrent lea\-es, compact, very numerous, 

 glabrous, of a light olive-green colour, the internodes terete, ver}^ short. Free ends 

 appressed, scarcely acute. jMale amenta numerous at the end of the branchlets, 

 short, with few whorls of stamens. Female amenta not seen. 



Fruit cones single or in clusters at the base of the second year's growth 

 of branchlets, ovoid-pj'ramidal or egg-shaped, smooth or slightly rough, over an 

 inch long when opened, glaucous, becoming black by age. Cone scales valvate, 

 the alternate smaller ones onl}- one-fifth shorter than the larger, dorsal point 

 prominent, the central columella short and slender. Seeds mostly two winged. 



III. LEAVES. 



(a) Economic (vide Chemistry). 



(b) Anato:*iy. 



A cross section through the three decurrent leaves and branchlet gives a 

 good picture of the structure of these organs and their respective subordinate 

 character in forming, as it were, one whole body in this part of the tree. 



The three dorsal surfaces occup\' almost the greatest proportion of the 

 outline of the trefoil figure, the three narrow channels being formed bv the trans- 

 piratorv ventral surfaces of the leaves, and the stomata are protected bv the 

 elongated cells of the cuticle as -in some other species. 



The epidermal cells are larger proportionally to the leaf mass than realises 

 in other species, whilst the hypodermal cells are especially small. 



These essentials of the assimilatory surface are supported by well-defined 

 palisade cells of the mesoph\dl, the spongy tissue of which it is loosely composed. 



Parenchymatous cells are packed between the base of each channel and the 

 phloem of the central cylinder, and around the oleo-resin ca\-ities where they may 

 be regarded as endodermic. 



Each leaf has a bundle at the inner edge of the oleo-resin ca^•ities, and these 

 are supported bj" cells of the transfusion tissue. 



The secretory cells of the oleo-resin ca\'ities are generalh* filled with the 

 manganese compound substance in the sections, and in that respect resemble 

 those of C. Drummondu. 



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