I30 SOUTH AFRICAN FLOWERING PLANTS, 



of heat by radiation, or as a protection against too 

 great heat. 



Many species have spines instead of stipules. 

 These have suggested the name "Wait-a-bit" thorn 

 to the common species, A. Iwrrida, the Karroo thorn. 

 Some species have compound blades, but the Austra- 



FiG. b2.—Aca'cia hor'rhla. 1. Flower-bud (x 3). 

 II. Section tbvougli flower (x 5). III. Diagram 

 of flower. 



lian Wattle cultivated at the Cape has no blade ; the 

 petiole is flattened into a " phyllode,"- and stands with 

 its edges turned towards the sky and earth. 



The tough wood of the Wait-a-bit thorn renders 

 it useful for building purposes, as well as for wheels, 

 poles, yokes, and turnery. 



Any plant of this family will be found to bear 



