410 R. T. BAKER, 



SOME IRONBARKS OP NEW SOUTH WALES. 

 By R. T. Baker, f.l.s. 



With Plates XX - XXIV. 



Bead before the Royal Society of N. 8. Wales, November 7, 1917. 



This group of trees — the Ironbarks, is one of the best known 

 in the Australian flora, and is especially famous for the 

 hardness, weight, strength and durability of its timber. 

 The number of species is rather limited, less than a dozen 

 being so far described. 



Most of the other groups of Eucalypts grade into each 

 other, but the Ironbarks seem to be an isolated class, and 

 so form a well defined collection of forest trees, and corn- 

 pared with the geographical range of the others, their 

 distribution may be said to be rather limited, being found 

 principally aloog the ranges and district of the middle 

 portion of the east coast of the Continent. 



Most of the species are well defined and their timbers 

 very distinctive, and it is about this latter portion of the 

 tree that this- paper is more particularly concerned, for it 

 was discoveries made in classifying the woods that gave 

 rise to this research. 



The timber of E. crebra, E. siderophloia, E. sideroxijlon, 

 gave no difficulty of determination, but it was not so when 

 dealing with what was generally passed as E, paniculata 

 timber. 



Under what has been commonly known as E, paniculata 

 it was found that several distinct timbers occur, each 

 possessing characteristic physical properties, which bar 

 them from being regarded as one and the same timber, 

 especially technologically. This left no alternative but to 



