BY J. H. MAIDEN. 497 



"No. 2 has a thin, brown bark, lighter in colour than No. 1, 

 and not so deeply furrowed; the upper portion of the trunk and 

 branches are smooth like No. 4." 



" No. 3 has at the lower part of the stem or trunk the deeply 

 furrowed, dark-coloured bark of No. 1, changing then for some 

 feet into the type of No. 2 (thin and brown). Higher up it 

 becomes thinner and flaky in texture. Upper portion of stem 

 and branches like No. 4 (Gum top)." 



He then adds : — " You will of course understand that Iron- 

 bark trees showing hybrid forms are not common in our young 

 forest, being only occasionally met with." 



I have received from Mr. Blackburne a complete suite of 

 herbarium specimens, bark and timbers of these trees. They 

 bear out his descriptions. Nos. 2 and 3 are intermediate 

 between Nos. 1 and 4, and on these specimens alone I fail to 

 see how the fact that E, sideroxylon and E. leucoxylon hybridise 

 can be resisted. 



E. LEUCOXYLON F.V.M., and (?) E. fasciculosa F.v.M. 



Mr. Walter Gill, Conservator of Forests, Adelaide, sent me 

 herbarium specimens, timber and bark of an aberrant tree from 

 Kuitpo, S.A., with the following note — " I send you specimen of 

 E. leucoxylon timber showing a very red heartwood which I have 

 only seen in this district, the northern Blue Gum {E. leucoxylon) 

 being all one colour." 



The herbarium specimens are obviously strongly akin to those 

 of E. leucoxylon F.v.M. (They also resemble those of E. sider- 

 oxylon A. Cunn., but I do not know an individual of that species 

 nearer than some hundreds of miles). The timber is deep red 

 and the bark is somewhat fibrous (Box-like), characters rarely 

 present in E. leucoxylon. It seems reasonable to look upon this 

 rare plant as a hybrid; and as to the other parent, Mr. Gill 

 suggests E. fasciculosa as likely. The points in which these 

 specimens dififer from E. leucoxylon could be supplied by E. 

 fasciculosa, a red-timbered species abundant locally. 



