Eupatorium album
| White thoroughwort | |
|---|---|
| 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[2] | |
|
Synonymy
| |
Eupatorium album, or white thoroughwort, is a herbaceous perennial plant in the sunflower family native from the eastern and southern states of the USA, 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 albumis 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]
- Eupatorium album var. album - most of species range
- Eupatorium album var. subvenosum A. Gray - Delaware, District of Columbia, New Jersey, New York
- Eupatorium album var. vaseyi (Porter) Cronquist - from Alabama to Pennsylvania
References
- ↑ "Eupatorium album". NatureServe Explorer. NatureServe. Retrieved 2010-09-12.
- ↑ The Plant List, Eupatorium album L.
- 1 2 3 4 "Eupatorium album". Flora of North America.
- ↑ Biota of North America Program 2014 county distribution map
- 1 2 "Eupatorium". Flora of North America.
- 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
- Herz, W; Sharma, Rp (March 1976). "New hydroxylated ent-kauranoic acids from Eupatorium album". The Journal of Organic Chemistry. 41 (6): 1021–6. doi:10.1021/jo00868a023. ISSN 0022-3263. PMID 1255283.
External links
- Alabama Plants, Photographs and information for the plants of Alabama, USA , including photos.
- photo of herbarium specimen at Missouri Botanical Garden, collected in Missouri in 2012