CLASSIFICATION OF ANGIOSPERMS. 



297 



is obtained from a number of other species of Copaiba growing in 

 South America as well as C. copallifcra of Western Africa, and 

 Hardzvickia Mannii of tropical Africa, and H. pinnata of India. 

 An oleoresin known by the natives in the province of Velasco 

 in Bolivia as " Copaiba " is obtained from Copaiba paupcra. It 

 is thick, like Maracaibo balsam but lighter in color and resembles 

 in odor and taste true copaiba. It is distinguished from the 

 other specimens of American copaiba by its dextro-rotation 



Fig. 154. Hematoxylin: monoclinic tabular crystals from aqueous solution. 



[o]d + 36. On the addition of one to two volumes of petro- 

 leum ether it forms a clear solution, giving a white precipitate 

 on the addition of more ether. 



Toluifcra Balsaiiiuiii is a tree about 25 INI. high, with a straight 

 trunk, on which the branches first appear at a height of from 

 15 to 20 M., and is found growing in Northern South America. 

 The leaves are compound and with seven to eleven alternate, 

 oblong, acuminate, glandular-punctuate leaflets ; the flowers are 

 white and in simple axillary^ racemes ; the fruit is a winged, 

 indehiscent, i-seeded legume. The plants yield a balsam (official 



