Naturalisation in Extra- Tropical Countries. 171 



Eucalyptus corynocalyx, F. v. Mueller.* 



South- Australia, North- Western Victoria. The Sugar- Gum tree. 

 A timber-tree, attaining a height of 120 feet, length of bole to 60 

 feet, circumference at 5 feet from the ground reaching 17 feet. 

 The base of the trunk often swells out in regular tiers. The wood 

 remarkably heavy, very dense, hard and strong, less liable to warp 

 than that of many other kinds of Eucalyptus -wood [J. E. Brown], 

 It has come into use for fence-posts and railway-sleepers, naves > 

 and felloes. Its durability is attested by the fact, that posts set in j 

 the ground fifteen years, showed no sign of decay. The tree thrives i 

 well even on dry ironstone-ranges. Better than any other species | 

 in the waterless regions of the Wimmera [Dr. Rabe]. The sweetish 

 and pleasantly odorous foliage attracts cattle, sheep and camels, 

 which browse on the lower branches, as well as on saplings and 

 seedlings. Scarcely any other Eucalypt is similarly eaten [J. E. 

 Brown], It should therefore be planted on cattle-and sheep-runs 1 

 in arid districts, to furnish additional provender. In ordinary 1 

 culture the writer does not find this species of quick growth; but ^ 

 Mr. Brown records that it has grown 7 to 8 feet in a year at Quorn, 

 and that it is one of the most valuable of all trees for the dry and 

 arid regions of South- Australia. It prefers however humid soil 

 near water- courses, according to Mr. Tepper. Has withstood a 

 temperature of 18 F. in the South of France [Naudin]. 



Bucalyptus crebra, F. v. Mueller.* 



/ The narrow-leaved Ironbark-tree of New South Wales and 



| Queensland. Wood reddish, hard, heavy, elastic and durable ; 



j much used in the construction of bridges and for railway-sleepers, 



\jilso for wagons, piles, fence-posts. E. drepanophylla is a closely 



allied species of similar value, bearing an enormous strain. Both 



exude astringent gum-resin, resembling kino in appearance and 



property, to a considerable extent. 



Eucalyptus diversicolor, F, v. Mueller.* (E. colossea, F. v. M.) 



The Karri of South- Western Australia. A colossal tree, excep- 

 tionally reaching the height of 400 feet, with a proportionate girth 

 of the stem. Mr. Muir measured stems nearly 300 feet long with- 

 out a branch ; widths of the timber as much as 12 feet can be 

 obtained. Furnishes good timber for building, even for masts, 

 likewise for planks ; also valuable for shafts, spokes, felloes, fence- 

 rails ; it is elastic, but not so easily wrought as that of E. 

 marginata. Mr. Gr. Simson does not deem the wood very durable, 

 if exposed to moisture or if in contact with the ground. Its 

 strength in transverse strain is equal to English oak. Very fair 

 progress of growth is shown by the trees planted even in dry 

 exposed localities in Melbourne. The shady foliage and quick 

 growth of the tree promise to render it one of our best for avenues. 

 In its native localities it occupies fertile, rather humid valleys and 



