PHANEROGAMIA 



627 



form cotton wool. The most important species of Cotton are G. barbadense, 

 G. arbor eurn, G. herbaceum (Fig. 681). 



OFFICIAL. Gossypiurn barbadense and other species yield GOSSYPIUM. 



l-'n;. I'lM. Flowering branch and open fruit ot Oossypium herlxwcum (J nat. size). OFFICIAL. 



Order 18. Cistiflorae 



The plants belonging to this order are characterised by their 

 usually regular, pentamerous flowers ; the stamens are increased in 

 number by chorisis, or when the separation of the branches is incom- 

 plete they form distinct bundles ; the superior ovary is usually 

 trimerous. 



Family 1. Ternstromiaceae. Herbs, shrubs, or -trees, with alternate, simple, 

 leathery leaves. Flowers regular ; aestivation imbricate ; sometimes with indistinct 



