THE NEMESIA AND HARVEY A FAMILY. 195 



carpels separate from each other. There are nearly 

 twenty species in South Africa, and the genus does not 

 appear to be known elsewhere. 



Halle'ria. — This genus has three species in South 

 Africa. They are smooth-leaved shrubs with red 

 flowers. • 



Fig. 79 (I. to IV.) shows the flower to have a 

 nearly regular corolla (L), but the stamens are still 



[II 



Fig. 79. — Halle'ria. 



in two pairs of different lengths (II.). The diagram 

 (III.) gives the relative positions of the parts of the 

 four floral whorls. The ''lip" (or usually enlarged 

 front petal) is the one in front, while the " hood " 

 (wanting in Halle'ria) will be seen to be made of two. 

 (IV.) illustrates very well the two ovary cells and 

 large placentas covered with ovules. 



One species {H. ho'cida), called the "White Olive," 

 has a fine-grained wood. 



Harvey'a. — This is a veiy handsome flowering 



