692 NOTES ON THK NATIVE FLORA OF N. S. WALES, X., 



its very wide range in Australia and New Zealand, and its 

 adaptability to environment. Along the coast it is often known 

 as " White Tussock," because of its pale grey colour, and is 

 regarded as an indication of good forest-land; it may occur 

 within a short distance of the ocean, and sometimes, in favoured 

 situations, grows into robust plants of three to four feet high. 

 It shows its disregard for climatic effect b}^ climbing from sea- 

 level to upwards of 6,000 feet, where, owing to the influence of 

 more rigid conditions, it becomes matted and dwarfed, losing- 

 much of the tussocky form, and in summer is most useful as 

 sheep-fodder. 



Among the Liliacese, the somewhat succulent little plant, 

 Bulhine bulbosa, was found in various places, including the 

 summit of Tidbinbilla. This species has an exteirded range in 

 Eastern Australia and Tasmania, and in addition to being found 

 at elevations of 5,100 feet, as in this case, its yellow flowers are 

 conspicuous every spring in the much drier interior at such 

 places as the Macquarie and Lachlan Rivers. 



The little terrestrial orchid, Caladenia dimorpha, was only 

 noticed within a few yards of the actual summit of Tidbinbilla, 

 while C. alba was seen a few hundred feet lower, 



Casuarina stricta (She-Oak) was found on various hills, in- 

 cluding Ainslie, Majura, Stromla (2,560 feet), and Mugga Mugga 

 (2,662 feet), near Tharwa, and also to the west of the Naas River 

 on the ascent to Gudgenby, where it was growing on the northern 

 or warm side of granite-hills at elevations up to 3,000 feet. I 

 have not found it at an altitude exceeding this.* 



Casuarina Cunnhighamiaiia (River-Oak) occurs along the 

 banks of the Murrumbidgee up to within about four miles of 

 Tharwa; above this point, the country is evidently too cold for 

 it. This is an attractive-looking tree and always grows within 

 reach of fresh water, but is restricted in the extent of river it 

 will follow, by the degree of cold in the highland and warmth 

 in the lowland. This Oak-tree may be found on the rivers from 

 Tropical Queensland southerly to the Murrumbidgee and its 



For previous remarks, see These Proceedings, 1909, Vol. xxxiv., p.;^26. 



