Naturalisation in Extra-Tropical Countries. 185 



Eucalyptus resinifera, Smith.* 



The Red Mahogany-Eucalypt of South-Queensland and New 

 South Wales. A superior timber-tree, of large size. Wood much 

 prized for its strength and durability [Rev. Dr. Woolls]. This 

 Eucalyptus has proved one of the best adapted for a tropical clime; 

 it grew 45 feet in ten years at Lucknow, but in the best soil it has 

 attained 12 feet in two years [Dr. Bonavia]. Does well at the city 

 of Algiers [Prof. Bourlier]. Proved in Italy nearly as hardy as 

 E. amygdalina and E. viminalis, according to Prince Troubetzkoy, 

 but is often confounded with E. siderophloia. A large-leaved 

 variety extends far into the tropics. 



eucalyptus robusta, Smith.* 



New r South Wales and Southern Queensland, where it is known 

 as Swamp-Mahogany. It attains a height of 100 feet and a stem- 

 girth of 12 feet, bearing a really grand mass of foliage. Resists 

 cyclones better than most of its congeners. The wood is remarkably 

 durable, reckoned a fairly good timber for joists, also used for ship- 

 building, wheelwrights' work and many implements, for 

 instance such as mallets. The tree seems to thrive well in low, 

 sour, swampy ground near the sea-coast, where other Eucalypts 

 look sickly, but E. robusta the picture of health [W. Kirton]. 

 It is this species, which with E. citriodora has thriven so particularly 

 well in the drier parts of Mauritius [C. van Keirsbilck] ; succeeded 

 also well at the city of Algiers [Bourlier]. Leaves perfectly dried 

 yielded 12 per cent, of kino-tannic acid [Maiden]. 



Cucalyptus rostrata, Schlechtendal.*' 



The Red Gum tree of Southern Australia and many river-flats in 

 the interior of the Australian continent, nearly always found on 

 moist ground with a clayey subsoil, and with most Eucalypts com- 

 paratively cattle- and sheep-proof. /It will thrive in ground, 

 periodically inundated for a considerable time, and even in slightly 

 saline places. Attains exceptionally a height of 200 feet with a 

 comparatively slight stem, but is mostly of a more spreading* habit 

 of growth than the majority of its tall congeners. Prof. Tate 

 measured a tree on Mount Lofty, which showed a stem-girth of 25 

 feet. Mr. R. Gr. Dry sd ale of the Riverina-district observed, that N 

 an exceptional temperature of 125 F. in the shade did not shrivel 

 the foliage of this tree ; it has also withstood the severest heat in. 

 Algeria better than E. globulu^- and Dr. Bonavia found it to thrive 

 well in the province of Oude in places, where E. globulus, E. 

 obliqua and E. marginata perished under the extreme vicissitudes 

 of the clime ; succeeds also well on the mountains of Ceylon. It 

 does not bear cold so well as E. amygdalina, succumbing when still 

 young at a temperature below 23 F., as observed in Italy by Prince 

 Troubetzkoy. In Mauritius and Reunion it resisted the hurricanes 

 better than any other Eucalypt ; in the latter island the Marquis 



