366 



COLLEGE BOTANY 



A very valuable oil is extracted from the seeds and the re- 

 maining solid parts are used for stock feed and for fertilizers 

 (Fig. 208). 



The okra or gumbo (Hibiscus esculenius Linn.) (Fig. 209 ) 

 is of African origin, but its early history is unknown. It is 

 grown in various parts of the United States and used in soups. 



This family also includes many ornamentals, such as holly- 

 hocks (Fig. 120) and the Athseas, as well as many weeds. 



FIG. 208. Cotton production. 



VIOLACE^E (Violet Family). Herbs; roots fibrous; leaves 

 alternate with stipules; inflorescence axillary and usually soli- 

 tary; flowers perfect and irregular; sepals five; petals five and 

 alternate with the sepals; stamens five; pistil one-chambered 

 but with three carpels with parietal placenta ; fruit a dry cap- 

 sule (Fig. 211). 



This family includes many species of violets and pansies. 

 Many varieties are grown extensively for ornamental purposes. 



