46 



NOTES ON NATIVE FLORA OF NEW SOUTH WALES, VI., 



Torrington, parts of the eastern faces are sheltered from western 

 influence, and afford suitable conditions for the growth of some 

 coastal plants. The question of aspect, whether east or west, 

 plays an important part in regulating the distribution of the 

 native flora in this State, and a western aspect in the Mountain 

 Area implies an absence of brush or jungle. 



The district is full of interest 

 to one who studies the various 

 influences which operate on the 

 distribution of plant life, for 

 here are found coastal species 

 which flourish on the Triassic 

 sandstone around Sydney, and 

 which at Torrington have 

 sought out a somewhat similar 

 soil derived from a decompos- 

 ing granite; and although the 

 altitude is so much higher than 

 that of the coast, the tempera- 

 ture of this elevated plateau 

 is modified by the warmth of 

 the more northern latitude. 

 Within this area, also, though 

 generally selecting a different 

 geological formation, are species 

 which belong to the Interior, some even extending into South 

 Australia. 



The principal geological formations supporting the flora 

 described may be summarised under the names of blue granite, 

 acid granite (denoting an abundance of silica) and indurated 

 claystone formation. The blue granite occurs chiefly between 

 Deepwater and Stannum, also between Deepwaterand Tent Hill. 

 The acid granite produces the flora between Stannum and Tor- 

 rington, while the indurated claystone is found around Emma- 

 ville. The flora of the acid granite area is profuse compared 

 with that of the more open blue granite country, though the 



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