Tanacetum (U. S. P.)—Tansy.
Botanical name: 
 Classic texts: King's 1898.
Classic texts: King's 1898.
 
      
  Tanacetum umbelliferum Boiss.
Engl.: sweet pellitory.
 Classic texts: King's 1898.
Classic texts: King's 1898.
Classic texts: King's 1898.
Classic texts: USDisp 1918.
Henriette's herbal is one of the oldest and largest herbal medicine sites on the net. It's been online since 1995, and is run by Henriette Kress, a herbalist in Helsinki, Finland.