Eupatorium altissimum

Tall thoroughwort

Secure  (NatureServe)
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Eupatorium
Species:
E. altissimum
Binomial name
Eupatorium altissimum
L. not (L.) L.
Synonyms
Synonymy
  • Eupatorium elatum Salisb. 1796, not validly published, not Steetz 1854
  • Eupatorium floridanum Raf. ex Torr. & A.Gray, not validly published
  • Eupatorium ramosum Mill.
  • Eupatorium rupestre Raf.
  • Eupatorium saltuense Fernald
  • Uncasia altissima (L.) Greene

Eupatorium altissimum, with the common names tall thoroughwort and tall boneset, is a perennial herbaceous plant in the Asteraceae family with a native range including much of the eastern and central United States and Canada. It is a tall plant found in open woods, prairies, fields, and waste areas, with white flowers that bloom in the late summer and fall.