CLASSIFICATION OF ANGIOSPERMS. 



307 



Sweet and Bitter Orange tree contain a volatile oil known as Oil 

 OF Neroli, and composed of limonene, geraniol, linalool, etc. The 

 oil from the rind of the fruit is known as oil of orange peel, and 

 is obtained chiefly from Italy and Sicily. It is composed of 

 limonene, citral, citronellol, etc. The oil from the Bitter Orange 

 peel has a superior flavor and is known as Bigaradia oil. The 

 Bergamot Orange is the fruit of the sub-species Bergamia, culti- 

 vated in Europe, but only rarely in the United States. The oil of 

 the rind of the fruit is known as Bergamot oil and consists 



Fig. 158. 



Citrus Aurantium' showing axillary cluster of flowers,— 

 After Berg and Schmidt. 



largely of linalyl acetate. The shaddock or grape-fruit is derived 

 from the sub-species sinensis var. decumana, a tree indigenous to 

 the Malay Archipelago and extensively cultivated in India, Flor- 

 ida, California and elsewhere. The fruits are quite large, some- 

 times weighing several kilograms, and those which are round are 

 the most valuable commercially, being known as Pomelos or 

 Grape-fruits. The Blood Orange is the fruit of the sub-species 

 sinensis var. sanguinea. The Otaheite Orange which is ex- 

 tensively cultivated as a dwarf pot plant and the foliage and 

 flowers of which resemble those of lemon, is probably a variety of 



