CHAP. I.] OLACINE^.— AURANTIACE^. 307 



quite smooth in the Tea tree. It is said that 

 both the green and the black Tea are made 

 from the leaves of Thea viridis ; but there 

 is another species called Thea Bohea^ which has 

 smaller leaves, and is a more tender, and less 

 vigorous-growing plant. The young leaves of 

 Camellia Sasaiiqua, and some of the other 

 Camelhas, are also dried, and mixed with the 

 tea. All these plants are natives of Japan and 

 China, and require a slight protection in Eng- 

 land during winter. 



ORDER XXXVL— OLACINEiE.— THE OLAX TRIBE. 



Exotic trees from the East and West Indies, 

 little known in Britain. Heistria coccinea^ a 

 native of Martinique, is said to be the Partridge 

 wood of the cabinet-makers. 



ORDER XXXVII AURANTIACE^.— THE ORANGE 



TRIBE. 



The natural order Aurantiacese contains four- 

 teen genera ; but the only one I think my 

 readers will feel an interest in is the genus 

 Citrus. This genus comprises, among several 

 other species, C. medica, the Citron ; C. Limetta, 

 the sweet Lime ; C. Limonum, the Lemon ; 

 C. Paradisic the Forbidden fruit ; C. decumana, 

 the Shaddock ; C. Aurantium, the Sweet Orange ; 

 X 2 



