80 J. H. MAIDEN. 



E. leptophleba, F.v.M., E. drepanophylla, F.v.M., and 



E. siderophloia, Benth., forma decorticans, Bailey. 



In the Queensland Agric. Journ., xxvi, 127 (1911) Mr. 



F. M. Bailey gave the name E. siderophloia, Benth., forma 

 decorticans to a supposed new Eucalypt from Eidsvold on 

 the Upper Burnett River, Queensland, collected by Dr. 

 T. L. Bancroft. 



Ample material of this form and ample material of E. 

 leptophleba, F.v.M. have enabled me not only to investigate 

 the Eidsvold tree, but also to throw further light on the 

 imperfectly known E. drepanophylla, F.v.M. 



This form is known as "Mountain Ironbark," "Naked 

 Top Ironbark," or "Gum Top." It is found in rocky moun- 

 tainous country on the Upper Burnett, associated with E. 

 siderophloia, Benth. To begin with it will be best to 

 formally describe it. 



Timber. — Inferior in quality, colour red. 



Bark. — On the butt blackish, hard, furrowed, with flattish 

 ridges after the fashion of E. siderophloia, but with bare branches 

 as described by Dr. T. L. Bancroft in the following extract from 

 a letter : — 



" A remarkably fine tree, like a large Grey Ironbark, but the 

 branches of the top, up to the size of a man's arm or even 

 thicker, are white in colour; covered with a thin smooth 

 bark; the bark is always peeling off these thin branches, 

 and the ground below is strewn with it after the style of 

 E. hemiphloia." 



Juvenile leaves. — Extremely narrow, linear lanceolate, some 

 specimens having an average length of 5 or 6 dm. and a diameter 

 of 8 cm., oil dots abundant, marginal vein distinctly removed from 

 the edge. (These sharply separate this form from any species 

 with which it is like]y to be confused. I have no evidence that 

 Mueller ever saw juvenile leaves of this form or of his E. drepano- 

 phylla, but, if he did, they would afford some explanation of his 

 suggestion that E. drepanophylla is a form of E. crebra, F.v.M.). 



