Naturalisation in Extra-Tropical Countries. 119 



a year. Navel-oranges, weighing 19 ounces, have been obtained 

 at Rockhampton ; other varieties have been known to reach 

 3 pounds [Thozet]. N"eroli-oil is also obtained from the flowers 

 of this and closely allied varieties. The oil of orange-peel 

 might be used as a cheap and pleasant one in the distillation 

 of costly odorous substances, Even in Australia already an 

 aged tree of the ordinary orange yielded over 12,000 fruits in 

 a particularly favorable season. In tracts close to the coast 

 the trees need shelter. About four million pounds of orange - 

 flowers are annually treated for Neroli-oil at and in the vicinity 

 of Grasse, the price being about fourpeiice a pound (Revue 

 agricole de Maurice). 



Citrus nobilis, Loureiro. The Mandarin-Orange. The thin peel 

 separates most readily from the deliciously flavored sweet 

 pulp. There are large and small fruited Mandarin-oranges ; 

 the Tangerine variety is one of them ; also a dwarf variety 

 with seedless fruits exists (A. Jupp). 



Citrus Australasica, F. v. Mueller. 



Coast-forests of extra-tropical Eastern Australia. A shrubby 

 species, with ellipsoid or almost cylindrical fruits of lemon-like 

 taste, measuring 2 to 4 inches in length. They are thus very much 

 larger than those of Atalantia glauca of the eastern desert-interior 

 of tropic Australia, but both are of similar taste. These plants 

 are entered on this list, together with C. Planchoni, merely to 

 draw attention to them as probably capable of improvement in 

 their fruit through culture. 



Citrus Japonica, Thunberg. 



The Kumquat of Japan. A shrubby Citrus with fruits of the 

 size of a gooseberry, from which on account of their sweet peel and 

 acid pulp an excellent preserve can be prepared. 



Citrus DXedica, Linne.* 



The Citron-tree (in the widest sense of the word). Indigenous 

 to Southern Asia. For the sake of convenience it is placed here as 

 distinct from C. Aurantium. As prominent varieties of the Citrus 

 Medica may be distinguished : 



Citrus Cedra. Grallesio. The true Citron. From the acid 

 verrucular fruit essential oil and citric acid can be obtained, 

 irrespective of the ordinary culinary use of the fruit. A large 

 variety with thick rind furnishes candied the citrionade or 

 succade. The Cedra-oil comes from a particular variety. 



Citrus Limonium, Risso. The true Lemon. Lemon- juice is 

 largely pressed from the fruit of this variety, while the thin 

 smooth aromatic peel serves for the production of volatile oil 



