III.] 



TERNSTRdMlA CEyE. 



169 



by six genera, including the genus Garcijiia, whicli, besides 

 the Mangosteen, includes the species affording the drug and 

 pigment gamboge. The best gamboge is a gum exuded 

 from wounds in the bark of a Garcinia growing in Siam 

 and the Malay Peninsula, closely allied to, if not identical 

 with, a Ceylon species. The Family generally is charac- 

 terised by a coloured, resinous juice. 



The flowers are usually dioecious or polygamous, with the 

 sepals and petals in fours. 



Pinnay-oil is obtained from the seeds of our type-species 

 by pressure. It is used as a lamp-oil and in medicine. 



16. Natural Order, Ternstrdjniace(e. — The Tea Family. 



Trees or shrubs, usually with alternate, simple leaves. 

 Flowers hermaphrodite or unisexual. Calyx imbricate. 



Type — The Tea-shrub {Thea chinensis)^ 

 An evergreen shrub, with alternate, shining, simple leaves, 

 and axillary, pedunculate, white flowers. 



Observe the slight cohesion of the petals, which character 

 is not infrequent in several normally polypetalous Families, 



