91 



II. SYSTEMATIC. 



A tree of considerable size, often exceeding go feet (Fraser) with a hard, 

 dark-coloured, furrowed bark. Branchlets erect, crowded, light-green coloured, 

 not glaucous; lea\-es decurrent. Male amenta numerous, terminal, in clusters of 

 threes or more, cylindrical, under two lines long, a quarter of a line in diameter. 

 Female amenta not seen by us. 



Fruit cones in clusters, from three to more than twelve, either sessile or on 

 stout recurved pedicels, spheroidal, over an inch in diameter — almost 2 inches 

 when expanded, much \ATinkled and covered with prominent tubercles filled with 

 oleo-resin ; \-alves alternately less than quarter-inch shorter, valvate, the dorsal 

 point only traceable by the hyaline remains of the apex of the sporophyll ; the 

 central columella is a triangular-based pyramid over two lines in height. 



Seeds with two brownish wings. 



III. LEAVES. 



(a) Economic. (Vide Chemistry.) 

 (b) x\natomy. 



Three plates of sections through the decurrent portions of the leaves are 

 given in connection with this species, viz., Figures 42-44. 



These were chosen as they convey a good idea of the disposition of the oil 

 cavities in the spongy mesophyll, and also for the reason that they demonstrate 

 that these latter bodies are not ducts or channels as obtains in so many non- 

 Australian genera of Conifers. They also show them to be circular in shape on 

 a cross section, and oval longitudinalh^, the varying diameters being due to the 

 distance of the part sectioned, from the median area. Figure 42 gives a view 

 through a branchlet showing the decurrent portions of three leaves, with but one 

 leaf onh" having an oil ca\'itv. 



The origin of the oil cavities is lysigenous, and they were found to occupy 

 a central position in the spongy mesophjdl near the upper portion of the leaf and 

 near its free end. The epidermal and hypodermal ceUs are developed in an 

 uniseriate row and iound to occur only on the outer convex surface of the leaf. 



The under surfaces of the three leaves are shortly concave, and, as such 

 surfaces of separate leaves, are adjacent as in other species, a groove is formed 

 with a narrow opening made by the converging edges of the leaves, and which we 

 call the decurrent channel. 



The stomata on these concave surfaces of the leaves, partake of all the 

 characters of those described under C. glauca. Certain cells containing the black 

 manganese compound, and which stain the same as some of those of the pith, and 



