Flora of the Southeastern United States
2022 Edition

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ASTERACEAE

Xanthium orientale Linnaeus. Phen: Aug-Oct. Hab: Disturbed ground, roadsides, pastures, barnyards. Dist: Widespread in e. North America, and now nearly cosmopolitan; the details of its original distribution uncertain.

Origin/Endemic status: Native

Syn: < Xanthium orientale – Tomasello (2018); > Xanthium pensylvanicum – F; < Xanthium strumarium – Bah, Fl7, FNA21, GW2, K3, K4, Mi, Mo2, Pa, Tn, Tx, Va, WH3; < Xanthium strumarium ssp. cavanillesii var. cavanillesii – Löve & Dansereau (1959); < Xanthium strumarium var. canadense – C, G, GrPl, K1, NcTx, NE, Oh3, SE1, W

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