214 NOTES OX NATIVE FLORA OF NEW SOUTH WALES, III., 



often seemed a tendency for the root to gradually deca}", which 

 would therefore have the effect in such cases of eventually leaving 

 the new tree with its one horizontal root, and this latter stage is 

 commonly found when the young trees exceed 10 or 12 feet high. 

 It therefore seems probable that most of the old Yarran trees 

 grew from seedlings, and that suckers have become much more 

 common since the advent of clearing and ringbarking operations. 



Acacia implexa was sparsely distributed around Gilgandra, 

 and this spot appears to 1)6 about on the western edge of the 

 habitat of this species. It is known as Broadleaved Wattle and 

 Hickory. 



A. saliclyia, Lindl., the Cooba of the Lachlan countr}^, was not 

 seen, but has been recorded for the Castlereagh by Dr. Woolls 

 (' Lectures on the Vegetable Kingdom,' p. 69). 



Neither was A. neriifolia, A. Cunn., observed, though it is 

 common in the northern part of New England and is known to 

 extend past Gilgandra to the Nyngan district. The Acacia 

 mentioned by me in these Proceedings for 1900 (p. 7 17) as 

 occurring about 7 miles west of Trowell Creek House has since 

 been identified as this species, from a comparison with more 

 complete material collected by Mr. J. L. Boorman near Hermi- 

 dale in the same district. 



A. doratoxylon (Currawong) is not plentiful near Gilgandra, 

 but was noticed on a low ridge about 10 miles westerly from that 

 town. The ridge in question is so low as to be scarcely notice- 

 able, but in prehistoric times has been higher, and is being 

 gradually lowered by ordinar}^ denudation. On it were also 

 what might be termed a few remnants of Eucalyptus sideroxylon 

 and E. tereticorrds, var. dealbata, both of which prefer ridges in 

 the western districts. Ev^en should this land not be cleared, it 

 seems probable that these three species would disappear from it 

 in the distant future, and a stud}' of the feature shows that a 

 field geologist with some knowledge of the local flora in this level 

 class of country would thereby receive great assistance in tracing 

 disappearing contours. 



