SECT. II 



PHANEROGAMIA 



613 



of the axillary bud. Citrus is originally an East Asiatic genus ; a number of 

 species inhabit the warmer valleys of the Himalayas. All the important cul- 

 tivated forms have been obtained from the Chinese. Citrus decumana, the 

 Shaddock, is tropical ; C. inedica is the form which was known to the Greeks in 

 the expeditions of Alexander as the Median apple. It is now widely spread and 



Fin. 053. QIMSSM amara. (Xat. size. After BERC and SCHMIDT.) OFFICIAL. 



has a number of varieties of which Citrus (nied-ica) Limonum is the Lemon. 

 This tree was introduced into the Mediterranean region in the third or fourth 

 century. Citrus (medico) Bajoura has thick-skinned fruits from which citron is 

 obtained. Citrus Aurantium occurs in two distinct forms, C. (Aurantium) 

 vulgaris and C. (Aurantium) sinense. The latter is a variety of the Bitter 

 Orange tree of apparently Chinese origin, and already comes more or less true to 

 seed. The name Orange, which is introduced into many languages and is 

 derived from the Sanscrit word Nagarunga, points to the ancient cultivation of 



