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 tincloria), 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 Indigo j era tinctoria and /. Anil which are indigenous 



