Eupatorium album

Species of flowering plant

Eupatorium album

Eupatorium album var. album, 1913 botanical illustration

Conservation status

Secure  (NatureServe)[1]

Scientific 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, the 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]

* 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

[edit]

1. ^ "Eupatorium album". NatureServe Explorer. NatureServe. Archived from the original on April 15, 2013. Retrieved 2010-09-12.
2. ^ The Plant List, Eupatorium album L.
3. ^ a b c d "Eupatorium album". Flora of North America.
4. ^ Biota of North America Program 2014 county distribution map
5. ^ a b "Eupatorium". Flora of North America.
6. ^ a b 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

[edit]

* 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

[edit]

* 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

Taxon identifiers

Eupatorium album|

* Wikidata: Q5409932
* Wikispecies: Eupatorium album
* AoFP: 3058
* APA: 717
* CoL: 3CJCL
* EoL: 475563
* EPPO: EUPAL
* FNA: 250066731
* GBIF: 5402898
* iNaturalist: 162779
* IPNI: 99450-2
* IRMNG: 10207425
* ITIS: 35982
* NatureServe: 2.132636
* NCBI: 102768
* Open Tree of Life: 971141
* Plant List: gcc-16856
* PLANTS: EUAL2
* POWO: urn:lsid:ipni.org:names:99450-2
* Tropicos: 2710181
* WFO: wfo-0000059784
* WoRMS: 1118336

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