231 



2. E. Muelleriana, Howitt. 



I have already spoken strongly as to the affinity of these two species. 

 Contemplation of figvires 10-13, plate 38, will illustrate the transit between 

 them. This transit appears to be most marked in northern New South Wales and 

 southern Queensland specimens. The colours of the timbers of the two species do 

 not help one much in these transit forms. The colour of the timbers referred to is 

 a warm brown, while that of U. macrorrhyncha in its typical form is rather darker, 

 while that of E. Muelleriana is paler. 



But as one gets away from the type localities of species, the colour of tlie 

 timber varies within limits. Indeed timbers, like other products of plants, cannot 

 always be placed in one species without a qualifying statement that it Avould be 

 legitimate to look upon them as forms of another. I regret, as a systematist, to 

 have to say this, but it is a necessary corollary of the grand law of variation amongst 

 plants, often evident, but more frequently not so evident to the limited experience 

 and knowledge of man. 



8. E. diversifolia, Bonpl. 



E. santalifoUa, F.v.M. {E. diversifolia, Bonpl., J.H.M.), fi'Diii the limestone ridges of Guichen Bay, 

 and thence westward to Venus Bay beyond Spencer's Gulf, differs in smaller and less oblique leaves, with 

 more concealed veins, and anthers rather cordate than kidney-shaped, but the fruits are again the same, 

 unless the valves are smaller. Possibly it may prove a variety ; it flowers already in a shrubby state. I 

 have not seen the lid of its calyx. — {Eucahjptojraphia, Mueller, under E. mncrorrhyncha.) 



The affinity is, however, not very close, as references to the figures and text 

 in Part VII will show. 



