BY R. H. CAMBAGE. 793 



level of about 2700 feet. This tree had been carefully looked for 

 near Narrabri, Moree, and towards Warialda, as those places 

 approximate the altitudes at which it is usually found in the 

 Macquarie to Lachlan districts. It was not noticed, however, 

 but may occur between Warialda and Inverell. 



This species is exceedingly interesting as indicating the effect 

 of climatic influence in regulating its habitat. In the Lachlan 

 country it is usually found below an elevation of 1100 feet above 

 sea-level, a common altitude being about 800 feet. Near Attunga, 

 north of Tamworth, it may be seen at about 1400 feet, while at 

 Tingha, considerably to the north, it is growing at 2700 feet. It 

 also occurs at much the same altitude around Bolivia, and is 

 recorded by Maiden and Betche from Wallangarra, near the 

 Queensland border, which is slightly higher. It will thus be 

 seen that this species, which occurs so far south as the Murrum- 

 bidgee district, is in its northerly course driven easterly on to 

 higher levels as though trying to find an even temperature. In 

 the reverse manner, there are species such as E. macrorrhyncha 

 and E. Camhagei around Orange which push out much to the 

 westward, and will grow on lower levels as they proceed southerly 

 towards Albury. 



A close study of the feature reveals many interesting points, 

 of which the following is an example. ElcHodendron australe, 

 F.v.M., and Alphitonia excelsa, Reiss. (Red Ash), are both found 

 on the coast south of Sydney, continuing northwards, and are 

 associated with what is kno\vn as brush or jungle, though perhaps 

 not in its thickest form. In going northerly it is found that at 

 Tamworth the latter has already crossed the Main Divide at the 

 Liverpool Range, and may be found at an altitude of about 1800 

 feet. On the other hand. Acacia harpo'phylla, F.v.M., (Brigalow) 

 belongs to the interior of this State, and grows in country the 

 exact antithesis of Illawarra, but it comes easterly as northern 

 latitudes are approached until in Queensland, as recorded by the 

 Rev. J. E. Tenison Woods, all these three species associate, and 

 may be found growing in the Brigalow scrubs (these Proceedings, 

 1882, pp.139 and 146). 



