dragon's wort

noun4

1. •
   A perennial herb, tarragon, Artemisia dracunculus.
2. •
   Dracunculus vulgaris, dragon arum, a flowering plant in the arum (Araceae) family.
3. •
   Arisaema dracontium, green dragon, a herbaceous perennial native to North America.
4. •
   Bistorta officinalis common bistort, a plant in the knotweed (Polygonaceae) family, once classified as Persicaria bistorta and Polygonum bistorta.