| White thoroughwort | |
|---|---|
| Conservation status | |
| Scientific classification | |
| Kingdom: | Plantae |
| (unranked): | Angiosperms |
| (unranked): | Eudicots |
| (unranked): | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Tribe: | Eupatorieae |
| Genus: | Eupatorium |
| Species: | E. album |
| Binomial name | |
| Eupatorium album L. |
|
| Synonyms | |
|
Uncasia alba (L.) Greene |
|
Eupatorium album, or White thoroughwort, is a herbaceous perennial plant in Asteraceae native from the eastern states of the USA.[2] Like other members of the genus Eupatorium, it flowers with large numbers of small white heads. The flower heads have disc florets but no ray florets.[3] It grows a half meter to one meter tall,[2] making it one of the shorter Eupatorium species.[3]
It is capable of hybridizing with other Eupatorium species including Eupatorium sessilifolium and Eupatorium serotinum.[2] 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.[4]
E. album is native to the eastern United States, from the Atlantic coast to as far west as Louisiana, Ohio, and New York.[2] It 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.[4]