EXOGEN;E CALYCIFLOR^:. 



121 



Cassia acutifolia. 1. A flower somewhat magnified. 



Division 3. MimoseeE. Sepals and petals valvate. Sta- 

 mens hypogynous. 



USES. Gum Arabic oozes from various species of Acacia, 

 especially A. Verek and arabica. Catechu is obtained by 

 boiling the bark of A. Catechu ; and many kinds are employed 

 for tanning purposes. Several are fine timber trees. Finally, 

 the leaves and branches of some kinds are poisonous. The 

 spongy stems of Desmanthus natans supply a coarse kind of 

 rice paper. Most are objects of great beauty. 



TYPICAL GENERA. Acacia, Mimosa, Inga. 



Acacia Verek. J. A flower magnified. 2. The pistil. 3. A section of the 

 same. 4. Half a seed. 



