Fig.  i.    Rhizome  and  roots  of  Veronica  virginica,  L,.,  natural  size. 
The  plant  is  an  herbaceous  perennial,  having  a  simple,  erect 
stem,  from  2  to  6  feet  high,  bearing  leaves  in  whorls,  and  termin- 
ated by  a  long-panicled  spike  of  whitish  flowers. 
