Eupatorium album

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Distribution Map: Based on vouchered plant specimens only. View county names by placing the mouse cursor over a particular county.

Species Distribution Map
Family:ASTERACEAE
Species:Eupatorium album L.
Common Name:White Thoroughwort
Habitat:**
Associated Ecological Communities:**
Growth Habit:Herb
Duration:Perennial
Category:Vascular
USDA Symbol:**
Plant Notes:White Thoroughwort is a native herbaceous perennial in the Sunflower family (Asteraceae). It occurs throughout Alabama in dry pine or mixed pine-hardwood forests, in sand hills, and on roadside banks. It is a perennial with a caudex (the slightly enlarged hardened basal portion of the stem from which new growth emerges) or short rhizome. The roots are thick and cord-like. The stems are usually unbranched below the inflorescence, green in color, and pubescent. Leaves are opposite, sessile, elliptic to lanceolate in outline, with serrate margins. The leaves are pubescent and gland dotted, and often folded. Flowers are produced in heads. The heads are arranged in corymbiform arrays. The phyllaries are long acuminate or attenuate, pubescent, and gland dotted. The apices and margins of the phyllaries are white. Each head has 5 white disc flowers. The fruit is an achene. Two varieties occur in Alabama. Eupatorium album Linnaeus var. album occurs throughout the state. It has smaller leaves that are pubescent and have obtuse to rounded apices. Eupatorium album Linnaeus var. vaseyi (Porter) Cronquist is found in northern Alabama. It has larger leaves that are pubescent or glabrous and have acute apices. Molecular data suggest that this variety arose through hybridization between var. album and Eupatorium sessilifolium. White Thoroughwort is available from some wildflower nurseries. It prefers a well-draining sandy soil in full sun.--A. Diamond
Taxonomic Notes:**
Status:Native, G5T5 (Global Rank)
References:**
Specimen: View specimen details in the Alabama Herbarium Consortium Specimen Database

** Not applicable or data not available.

Classification

FamilyASTERACEAE - Aster family
Genus Eupatorium
Species Eupatorium album L. - White Thoroughwort

Citation

Citation Eupatorium album Linnaeus, Mant. Pl. 1: 111. 1767.
Basionym: **
Type: USA: PENNSYLVANIA: Without data, Bartram s.n. (lectotype: LINN 978.5). Lectotypified by J.L. Reveal, in C.E. Jarvis & Turland, Taxon 47: 360. 1998.

** Not applicable or data not available.

Synonyms

SynonymFull CitationBasionymType
Eupatorium album var. monardifolium Eupatorium album Linnaeus, var. monardifolium Fernald, Rhodora 39: 452, pl. 484(4-6). 1937. MARYLAND: Prince Georges Co.: Chillum, 24 Sep 1926, Blake 9723 (holotype: GH).
Eupatorium album var. petaloideum Eupatorium album Linnaeus, var. petaloideum (Britton ex Small) D. B. Ward, Novon 14: 367. 2004.Eupatorium petaloideum Britton ex Small 1897. 
Eupatorium album var. typicum Eupatorium album Linnaeus, var. typicum Fernald, Rhodora 39: 451. 1937, nom. inadmiss.Eupatorium album Linnaeus 1767. 
Eupatorium glandulosum Eupatorium glandulosum Michaux, Fl. Bor.-Amer. 2: 98. 1803. SOUTH CAROLINA:
Eupatorium petaloideum Eupatorium petaloideum Britton ex Small, Bull. Torrey Bot. Club 24: 492. 1897. FLORIDA: Duval Co.: Without data, Curtiss 1190 (lectotype: NY). Lectotypified by D. B. Ward, Novon 14: 367. 2004.
Eupatorium stigmatosum Eupatorium stigmatosum Bertoloni, Novi Comment. Acad. Sci. Bononiensis 8: 81, t. 12. 1846, non Meyen & Walpers 1843.  
Uncasia alba Uncasia alba (Linnaeus) Greene, Leafl. Bot. Observ. Crit. 1: 13. 1903.Eupatorium album Linnaeus 1767. 
Uncasia petaloidea Uncasia petaloidea (Britton ex Small) Greene, Leafl. Bot. Observ. Crit. 1: 13. 1903.Eupatorium petaloideum Britton ex Small 1897. 
Eupatorium album var. glandulosum Eupatorium album Linnaeus, var. glandulosum (Michaux) de Candolle, Prodr. 5: 178. 1836.Eupatorium glandulosum Michaux 1803 

Specimens and Distribution

This species has been reported in the following counties by the herbaria listed. An overview of the individual specimens are provided in the table that follows. Click on the accession number to view details; click on column headers to sort; choose a county or herbaria to filter the specimen data.

Counties included on distribution map: Autauga, Baldwin, Barbour, Bibb, Bullock, Butler, Calhoun, Cherokee, Chilton, Clay, Cleburne, Coffee, Conecuh, Coosa, Covington, Crenshaw, DeKalb, Elmore, Escambia, Etowah, Geneva, Hale, Henry, Houston, Jackson, Jefferson, Lauderdale, Lawrence, Lee, Madison, Marengo, Marion, Marshall, Mobile, Montgomery, Pike, Randolph, Russell, Shelby, St. Clair, Sumter, Talladega, Tuscaloosa, Washington, Wilcox

Counties represented by specimen data listed below:

Herbaria represented by specimen data listed below: ALNHS, AMAL, AUA, BRIT, JSU, SAMF, TROY, UNA, USAM, UWAL

Range of years during which specimens were collected: 1873 - 2019

Barcode / Accession No.
County
Coll. Date
Collector &
Collection No.
Herbarium &
Herbarium Name Used
Image
UNA00046546 Autauga 14 Aug 1873 Smith, Eugene A.
s.n.		 UNA
Eupatorium album L.
AUA000003560 Baldwin 26 Sep 1971 BOONE, ALLISON
031		 AUA
EUPATORIUM ALBUM L.
UWAL0043091 Baldwin 13 Aug 2003 Larsen, Harry S.
1318		 UWAL
Eupatorium album L.
AMAL00015051 Baldwin 13 Aug 2008 Barger, T. Wayne
Perd-481		 AMAL
Eupatorium album L.
ALNHS00009110 Baldwin 07 NOV 2018 Barger, T. Wayne
SP#4908		 ALNHS
Eupatorium album L.
TROY000033626 Barbour 20 Aug 2011 Morrison, Derek
31		 TROY
Eupatorium album Linnaeus
AUA000003561 Bibb 1 Aug 1979 BECKETT, SCOTT W.
235		 AUA
EUPATORIUM ALBUM L.
UNA00059186 Bibb 15 Aug 1993 Allison, James R.
7881		 UNA
Eupatorium album L. var. album
JSU110099 Bibb 31 Jul 1998 Whetstone, R. David
19667		 JSU
Eupatorium album Linnaeus
UWAL0052937 Bibb 24 Jul 2019 Keener, Brian R.
11429		 UWAL
Eupatorium album L.
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