570 NOTES ON THE NATlVtl FLORA OF NEW SOUTH WALES, viii., 



tinues for some distance among the sandstone hills, it does 

 not occur upon them, but is confined to the valleys which 

 have been denuded through them into the less acid soils 

 made up of Permo-Carboniferous shales and sandstones. It 

 seems probable, therefore, that it is a southern species, whose 

 northerly progress has been checked by this large area of 

 highly siliceous Hawkesbury Sandstone-formation. E. actr- 

 vula is readily identified, in the field, by its rather large 

 "sucker" leaves, its green, undulate, mature foliage, and its 

 truncated, obconical fruits. 



E. Sm'Uhii was noticed on Devonian quartzites near Cedar 

 Creek, also near Lannigan's Creek and towards Mount 

 Shivering. In this latter locality, which is the most inland 

 and elevated known to me for the species, it was growing on 

 Silurian slate-formation, at an altitude of 3,000 feet. From 

 the Kowmung, it extends southerly past Mittagong, Mount 

 Kembla, and Kangaroo Valley to the Braidwood district; 

 and is much valued for the excellent oil that it yields.* It 

 usually selects somewhat sheltered hillsides, and in the lower 

 part of the bole resembles an Ironbark or the Mountain Ash 

 {E. Sieheriana), owing to its dark, rough, deeply furrowed 

 bark, which tones off to smooth, often ribbony, on the upper 

 parts. Its fruits resemble those of E. viminalis, and may some- 

 times be confused with them, when the latter species is multi- 

 flowered instead of having the usual trifloral arrangement : 

 but generally the fruits of E. Smithri have a more domed 

 appearance, owing to the broad rim being forced outwards 

 as the fruits ripen. As a rule, the two species are not found 

 together, the open forest-land being usually selected by E. 

 viminalis, which is also more of a cold country type, and pre- 

 fers soils derived from more basic rocks than does E. Smithii. 

 Just east of the Hotel near Wollondilly Bridge, on Permo- 

 Carboniferous formation, a few Stringybarks were noticed, 



* See "A Research on the Eucalypts," by R. T. Baker, F.L.S., and H. 

 G. Smith, F.C.S., p 107. 



