Eupatorium album Linnaeus. Common name: White-bracted Thoroughwort. Phenology: Late Jun-Oct. Habitat: Dry woodlands. Distribution: CT, NY, OH, and TN, south to FL and LA; disjunct in s. AR and n. LA (though many populations previously considered to be. E. album west of the Mississippi River are E. sullivaniae).
Origin/Endemic status: Endemic
Taxonomy Comments: E. album is a diploid/autopolyploid species and the most widespread member of the Eupatorium album complex, a group of species which have undergone extensive allopolyploid speciation. Many members of the complex have been treated as infrataxa under E. album, but are better separated as distinct species (Schilling 2011). Var. glandulosum is alleged to differ from var. album in having the involucre with copious dark glands (vs. glandless or nearly so). The distinction is dubious; variation seems essentially continuous in our area, with frequent intermediates, and there seems to be little correlation between morphology and habitat/range.
Synonymy ⓘ: = Fl7, K4, Tn, Schilling (2011b); < Eupatorium album L. — Oh3, Pa, RAB, S, WH3; < Eupatorium album L. var. album — Ar, C, FNA21, NE, SE1, Va, W, Cronquist (1985); > Eupatorium album L. var. album — F, G, Tat, WV; > Eupatorium album L. var. glandulosum (Michx.) DC. — F, G, WV; Eupatorium album L. Basionym: Eupatorium album L. 1767
Links to other floras: < Eupatorium album var. album - FNA21
Show parent genus | Show parent in key(s)
Heliophily ⓘ: 8
Hover over a shape, letter, icon, or arrow on the map for definition or see the legend.

















Feedback
See something wrong or missing on about Eupatorium album? Let us know here: (Please include your name and email if at all complicated so we can clarify if needed.) We greatly appreciate feedback, and will include updates from you in our next webapp update, which can take a few months. If a species is not keyed, that's because keying is ongoing. Please don't send us feedback about unkeyed species.
Horticultural Information
Intro: Erect perennial of dry woodlands and disturbed areas.
Stems: Stems branched above (in inflorescence), hairy.
Leaves: Leaves opposite, mostly sessile, oval to lance-shaped, 1 1/2-5 in. long, coarsely toothed, gland-dotted beneath and nearly smooth to rough-hairy above.
Inforescence:
Flowers: Narrow, erect, fuzzy-appearing composite flowers (heads) in branching, terminal cluster; heads about 1/3 in. tall, each consisting of 4-5 tiny, white, 5-lobed, tubular disk florets with 2 protruding styles. A series of narrow green bracts with white, pointed tips surround the base of each head.
Fruits:
Comments:
Height: to 3 ft.
plant sale text:
bloom table text:
description: Erect perennial of dry woodlands and disturbed areas.
stems: Stems branched above (in inflorescence), hairy.
leaves: Leaves opposite, mostly sessile, oval to lance-shaped, 1 1/2-5 in. long, coarsely toothed, gland-dotted beneath and nearly smooth to rough-hairy above.
inflorescence:
flowers: Narrow, erect, fuzzy-appearing composite flowers (heads) in branching, terminal cluster; heads about 1/3 in. tall, each consisting of 4-5 tiny, white, 5-lobed, tubular disk florets with 2 protruding styles. A series of narrow green bracts with white, pointed tips surround the base of each head.
fruits:
comments:
cultural notes:
germination code:
native range:
0 unsaved edits on this page.