White thoroughwort
Eupatorium album var album, 1913 botanical illustration.

Secure  (NatureServe)[1]
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Eupatorium
Species:
E. album
Binomial name
Eupatorium album
Synonyms[2]
Synonymy
  • Uncasia alba (L.) Greene
  • Eupatorium fernaldii R.K.Godfrey
  • Eupatorium glandulosum Michaux
  • Eupatorium petalodium Britton ex Small
  • Eupatorium petaloideum Britton ex Britton
  • Eupatorium stigmatosum Bertol. 1846 not Meyen & Walp. 1843 nor Chodat 1843
  • Uncasia petaloidea (Britton ex Small) Greene

Eupatorium album, or white thoroughwort, is a herbaceous perennial plant in the family Asteraceae native from the eastern and southern United States, from eastern Texas to Connecticut, inland as far as Indiana.[3][4]

As with other members of the genus Eupatorium, Eupatorium album flowers with large numbers of small white heads. The flower heads have 4-5 disc florets each, but no ray florets.[5] The plant grows 50–100 cm (20–39 in) tall,[3] making it one of the shorter Eupatorium species.[5]

Eupatorium album is capable of hybridizing with other Eupatorium species including Eupatorium sessilifolium and Eupatorium serotinum.[3] Its appearance is similar to Eupatorium altissimum, but differs in that the bracts (located at the base of the flower head) taper to a long point.[6]

Eupatorium album grows in dry, open areas such as power lines, old fields, and eroded slopes. It will not grow under a shady canopy, but can be found in some open woods such as pine barrens.[6]

Varieties[3]

References

  1. ↑ "Eupatorium album". NatureServe Explorer. NatureServe. Retrieved 2010-09-12.
  2. ↑ The Plant List, Eupatorium album L.
  3. 1 2 3 4 "Eupatorium album". Flora of North America.
  4. ↑ Biota of North America Program 2014 county distribution map
  5. 1 2 "Eupatorium". Flora of North America.
  6. 1 2 Rebecca W. Dolan (September 2004). "Conservation Assessment for White thoroughwort (Eupatorium album L.)" (PDF). United States Forest Service, Eastern Region of the Forest Service - Threatened and Endangered Species Program.

Further reading


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