Naturalisation in Extra-Tropical Countries. 187 



Eucalyptus citriodora, Hooker.* 



Queensland. Generally on sterile stony ridges. A handsome 

 slender tree with a smooth white bark, supplying a useful timber, 

 especially for piles and girders. Succeeded remarkably well at 

 Lucknow [Ridley], also at Zanzibar, where it grows at a tremendous 

 rate [Sir J. Kirk], and thrives also in Bengal and Oudh [Gamble]. 

 It is this species, which grows so well on the hot plains of the Mag- 

 dalena River, attaining a height of 20 feet in two years, in regions 

 subject to protracted drought [Dr. Masters]. According to notes of 

 the late Mr. Thozet, a trunk 40 feet long and 20 inches in diameter 

 broke after a flexion of 17 inches, under a pressure of 49 tons. This 

 species combines with the ordinary qualities of many Eucalypts the 

 advantage of yielding from its fresh leaves a rather large supply of 

 volatile oil (slightly more than one per cent.) of excellent lemon-like 

 fragrance, in which respect it has, among other 120 species of Euca- 

 lypts, only one rival. This oil has come already into commerce 

 through Mr. Jeffries Tunbury's distillery at Port Curtis ; it contains 

 no Eucalyptol ; it is soluble in five parts of alcohol of 70 per cent, 

 strength [Schimmel]. Very retentive in perfumery. The young 

 plants also particularly desirable for window-culture, seedlings being 

 easily obtainable. Fresh foliage splendid for strewing about rooms 

 or placing in large vases for fragrance and sanitary purposes also. 

 Very closely allied to E. maculata, and perhaps only a variety. 

 Particularly adapted for a tropical jungle-clime. Dislikes frost. 



Eucalyptus coccifera, J. Hooker. 



Tasmania. Although only a subalpine form of E. amygdalina, it 

 may for cultural purposes be regarded as a very distinct tree. With- 

 stood the severest winters of Wimbledon [J. Colebrook]. 



Eucalyptus COrdata, La Billardiere. 



Southern Tasmania. Maximum height, 50 feet ; flowering in a 

 shrubby state already. The variety E. urnigera (J. Hooker) is 

 particularly hardy, and may become of sanitary importance to colder 

 countries in malarian regions, the foliage being much imbued with 

 antiseptic oil. Greatest height of E. urnigera 150 feet ; stem- 

 diameter to 6 feet [Abbott]. 



Eucalyptus cornuta, La Billardiere. 



The Yate-tree of South-Western Australia. A large tree of rapid 

 growth, preferring a somewhat humid soil. The wood is used for 

 various artisans' work, and preferred there for the strongest shafts 

 and frames of carts and other work requiring hardness, toughness and 

 elasticity, and is considered equal to ordinary ash-wood. The tree 

 appears to be well adapted for tropical countries, as Dr. Bonavia 

 reports, that it attained a height of 8 to 10 feet in the first year of its 

 growth at Lucknow, and that the plants did not suffer in the rainy 



