BY J. H. MAIDEN. 763 



is sometimes a small tree. It is identical with Mr. Baker's E. 

 viridis. 



In the latter species we have greener and usually less glaucous 

 leaves than in E. jjolybractea, but in juvenile and mature leaves 

 or fruits they seem to run into each other. Typical viridis from 

 Girilambone has not only broadish leaves, but a glaucous cast on 

 the young leaves. Indeed both it and cajuputea {polyhractea) are 

 closely related, and both have close affinity to E. odorata. 



The leaves have often a dull and bluish type of green, and often 

 have a channelled appearance as if a depression on the upper sur- 

 face was caused by the midrib. 



The Ironbark-Boxes. — These seem to me to be indubitable 

 hybrids. Mr. R. H. Cambage* has pointed out the probability of 

 an Ironbark-Box of the Lachlanf being a hybrid between E. sider- 

 oxylon and E. Woollsiana. He has also suggested the hybrid 

 character of the Ironbark-Box or Bastard Ironbark of Nymagee, 

 and the White Ironbark or Iron^ark-Box of Barmedman; and I 

 would add the Cooburn or Black Box of Narrabri. I only men- 

 tion these forms because they have been referred to at some length 

 in my paper on E. odorata, a species they closely resemble in 

 bark, timber, buds, kc. 



The foliage of the Ironbark-boxes is duller than that of E. 

 odorata, and the venation less marked. 



Mr. Cambage's observations as to the evolution of these forms 

 are interesting, and must be borne in mind in considering the 

 relations of the western "Boxes." I confine myself at this 

 moment to emphasising the resemblance of these forms to E. 

 odorata. 



* These Proceedings, 1900, p. 715. 

 t Mr. K. H. Cambage writes to me : — " I should say that the Nymagee and 

 Condobolin trees are associated with the narrow-leaved form of E. Woollsiana, 

 and even the Barmedman ones are rather more the narrow forms than the 

 broad, but it is getting difficult in the latter place." The "Narrow-leaved 

 form of E. Woollsiana " is the form that, I recommend presently, should be 

 known as E. Woollsiana, the broader-leaved forms really belonging, in my 

 opinion, to E. hemiphloia. 



