CLASSIFICATION OF ANGIOSPERMS. 



573 



at both ends, and usually contains two or three seeds. The seeds 

 are official as Physostigma. 



FIG. 321. Wild Indigo (Baptisia tinctoria), a perennial herb resembling a shrub, 

 possessing nearly sessile, 3-foliate leaves, and having, at the ends of the branches, loose 

 racemes of yellow flowers. A pale blue coloring principle has been obtained from the plant 

 resembling indigo, though somewhat inferior. After Brown. 



The blue coloring principle INDIGO is mostly obtained from 

 the herbs Indigofera tinctoria and /. Anil which are indigenous 



