IN EXTRA-TROPICAL COUNTRIES. 77 



species, with oblong 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 coast 

 and the desert interior of tropic Australia, which are also 

 of similar taste. These plants are entered, together with the 

 following on this list, merely to draw attention to them as 

 likely capable of improvement of 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 Medica, Linne.* 



The Citron (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, Gallesio. The real Citron. From the acid tuber- 

 cular 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 eitrio- 

 nate or succade. The Cedra oil comes from a particular 

 variety. 



Citrus Limonium, Risso. The Real Lemon. From the fruit of 

 this is largely pressed the lemon juice, while the thin, smooth, 

 aromatic peel serves for the production of volatile oil or for 

 condiments. The juice of this fruit is particularly rich in 

 citric acid. A large variety is the Rosaline Lemon. 



Citrus Limetta, Risso. The real Lime. The best lime-juice is 

 obtained from this variety, of which the Perette constitutes a 

 form. 



Citrus Lumia, Risso. The Sweet Lemon, including the Pear 

 Lemon with large pear-shaped fruit. Rind thick and pale ; 

 pulp not acid. This variety serves for particular condiments. 



Citrus Planchoni, F. v. Mueller. (C. Australis, Planchon, partly.) 



Forests near the coast of sub-tropic East Australia. A noble 

 tree, fully 40 feet high, or, according to Hartmann, even 60 

 feet high, with globular fruits about the size of a walnut, 

 called in Australia Native Oranges. The species has first 

 appeared under the above name in the " Report on the Vege- 

 table Products of the Intercolonial Exhibition of 1867." Its 

 beautiful wood takes a high polish ; hence it is made use of for 

 the finest cabinet-work. 



