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Asteraceae
Xanthium

not marked as a favorite taxon Xanthium strumarium Linnaeus. Common name: European Cocklebur. Phenology: Jul-Nov. Habitat: Ballast, waste areas near ports. Distribution: Native of Europe.

Glossary (beta!)

Section: Xanthium.

Origin/Endemic status: Europe

Synonymy ⓘ: = F, Fernald (1946), Tomasello (2018); = n/a — Tat; = Xanthium strumarium L. ssp. strumarium var. strumarium — Löve & Dansereau (1959); = Xanthium strumarium L. var. strumarium — C, G, NE, NY; < Xanthium strumarium L. — FNA21, K4, Mi, Mo2, Pa. Basionym: Xanthium strumarium L. 1753

Links to other floras: < Xanthium strumarium - FNA21

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Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: FAC (taxonomic split from wetland indicator species)
  • Eastern Mountains and Piedmont: FAC (taxonomic split from wetland indicator species)
  • Great Plains: FAC (taxonomic split from wetland indicator species)
  • Midwest: FAC (taxonomic split from wetland indicator species)
  • Northcentral & Northeast: FAC (taxonomic split from wetland indicator species)

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Horticultural Information

NCBG trait

Intro: Erect to ascending annual of disturbed ground, roadsides, pastures, barnyards and beaches.

Stems: Stems thick and ridged, branched, often reddish or speckled with purple, smooth or with hairs pressed to stem.

Leaves: Leaves alternate (lowermost may be opposite), on long reddish-green petioles, triangular-oval to nearly round, 2-6 in. long, with 3-5 irregularly toothed lobes, green above and beneath, slightly rough above.

Inforescence:

Flowers: Composite flowers (heads) in clusters of 2-4 in leaf axils; heads rounded to cylindric and consisting of greenish-white, minute male or female disk florets interspersed with spines.

Fruits: Fruit a spiny, cylindircal bur.

Comments:

Height: 1-6 ft.

plant sale text:

bloom table text:

description: Erect to ascending annual of disturbed ground, roadsides, pastures, barnyards and beaches.

stems: Stems thick and ridged, branched, often reddish or speckled with purple, smooth or with hairs pressed to stem.

leaves: Leaves alternate (lowermost may be opposite), on long reddish-green petioles, triangular-oval to nearly round, 2-6 in. long, with 3-5 irregularly toothed lobes, green above and beneath, slightly rough above.

inflorescence:

flowers: Composite flowers (heads) in clusters of 2-4 in leaf axils; heads rounded to cylindric and consisting of greenish-white, minute male or female disk florets interspersed with spines.

fruits: Fruit a spiny, cylindircal bur.

comments:

cultural notes:

germination code:

native range:



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