499 



volcanic rocks, Springsure district (occurs on basalt, porphyry and rhyolite in Springsure district); on 

 volcanic rocks, Stanthorpe (the rocks on which it occurs here are tuffs, porphyries, &c); on basalt in the 

 Carnarvon Range; on calcareous sandstone, but only on high, well-drained, ground with rock near surface 

 in the Roma, Mitchell and Maranoa district generally, also in Central West Emerald, Bogantungan, 

 Drummond Range, on calcareous sandstones, on high dry ground. Hybridisation with E. popidifolia 

 appears to take place — noted at Roma, Box Vale and Glenhaughton. Hybridised with E. decorticans at 

 Glenhaughton. [I have not seen specimens of these reputed hybrids. — J.H.M.] On alluvial only in 

 mountain gullies like Clematis Creek, where the run-off is quick ; on dacites, Mt. Coolon occurs a stunted, 

 fluffy barked, blue-leaved Silver-leaf — to my mind like E. -pruinosa, but Mr. C. T. White says it is 

 E. melanophloia. This variety grows on dacites and rhyolites, Mt. Coolon, Kangaroo Hills, Featherbed 

 Range. Coolon, a stunted tree, sessile leaves, large fruits — growing on dacite, porphyry and rhyolite. It 

 resembles E. pndnosa." 



Dr. Jensen adds that this timber is invariably on a lime-rich formation, with 

 good subdrainage, associated with E. populifolia, E. maculata and Acacia excelsa. 



Western Australia. — " On gravelly plains between the Isdell River and Scented 

 Knob occurs, of a few square miles in extent, an open forest of Ironbark " (referred 

 to as E. crebra). (Fitzgerald, Kimberley Report, p. 12.) 



AFFINITIES. 



1. With E. pruinosa Schauer. 



Dealt with at Part XII, p. 73. Mr. Cambage's Croydon specimen is large-leaved, 

 and also bearing in mind that it is known as a Box (I have often pointed out that 

 Ironbarks lose much of their Ironbark character in the tropics), I looked upon it as 

 E. pruinosa Schauer. It is, I am satisfied, E. melanophloia — a sessile, large-fruited 

 form, with coarse leaves. It is figured at figs. 2a-d, Plate 240, and these figures should 

 be compared with those of normal E. melanophloia at Plate 54, Part XII. These 

 specimens show that the leaves of E. melanophloia may, exceptionally, be as large as 

 those of E. pruinosa, but the fruits of the two species are very different. 



2. With E. Jenseni Maiden. 



For this species see Part LVI, p. 255, and Plate 228. E. Jenseni is also an 

 Ironbark, and is analogous to the lanceolate-leaved form of E. melanophloia (see 

 Part XII, p. 71, and Plates 53 and 54). This lanceolate-leaved form is a more advanced 

 or " further grown up " stage of what we know as the normal, or broad-leaved form. 

 We are, indeed, always on the lookout for a narrower leaf in a species which we only 

 know with broad leaves. Speaking generally, we look upon the broad leaf as a sign 

 of youth, and the narrow one (usually lanceolate) as a sign of maturity. Comparing, 

 therefore, the two species, we find they differ in the very broad and stem-clasping 

 juvenile leaves of E. melanophloia (it may be that eventually we may find juvenile 

 leaves of E. Jenseni which more closely approach them), the more hemispherical fruits, 

 sunk valves, and pedicels of E. melanophloia. 



