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Xanthium spinosum L.
BATHURST BURR
Common Cockleburr; Spiny Cocklebur; Spiny Clotbur; Common Cocklebur; Xanthium ambrosioides Hook & Arn; Acanthoxanthium spinosum

Life   Plantae   Dicotyledoneae   Asteraceae   Xanthium

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Associates · map
FamilyScientific name @ source (records)
Cercopidae  Clastoptera lineatocollis @ UCR_ENT (1)
Erysiphaceae  Sphaerotheca castagnei @ BPI (1)
Mycosphaerellaceae  Septoria xanthii @ BPI (1)
Pentatomidae  Oechalia schellenbergii @ AMNH_PBI (1)
Pseudococcidae  Phenacoccus solani @ CSCA_TCN (1)
Pucciniaceae  Uromyces glycyrrhizae @ BPI (1)
Tingidae  Urentius sarinae @ UNSW_ENT (3)

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Following modified from Global Invasive Species Team, The Nature Conservancy
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FNA | Family List | FNA Vol. 21 | Asteraceae | Xanthium

2. Xanthium spinosum Linnaeus, Sp. Pl. 2: 987. 1753.

Spiny cocklebur, clotbur, lampourde épineuse

Xanthium ambrosioides Hooker & Arnott; X. spinosum var. inerme Bel

Plants 10—60(—120+) cm; nodal spines usually in pairs, simple or 2—3-partite, 15—30+ mm. Leaves: petioles 1—15(—25+) mm; blades ± ovate to lanceolate or lance-linear, 4—8(—12+) × 1—3(—5+) cm, often pinnately 3(—7+)-lobed, abaxial faces gray to white, densely strigose. Burs 10—12(—15+) mm. 2 n = 36.

Flowering Jul—Oct. Damp or seasonally wet, alkaline soils, waste places, margins of agriculture; 10—1000 m; N.B., Ont., Que., Sask.; Ala., Ariz., Calif., Colo., Conn., Del., Fla., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., Maine, Md., Mass., Mich., Miss., Mo., Mont., Nebr., Nev., N.H., N.J., N.Mex., N.Y., N.C., Ohio, Oreg., Pa., R.I., S.C., Tenn., Tex., Utah, Va., Wash., W.Va.; Mexico; Central America; South America; widely established in Old World.

Some authors have contended that Xanthium spinosum originated in South America and is introduced and/or naturalized everywhere else that it is found.

Updated: 2024-06-20 17:43:12 gmt
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