*Xanthium ambrosioides Hooker & Arnott. Hab: On ballast. Dist: Allegedly native of South America.
Origin/Endemic status: South America
Synonymy: = F, Fernald (1946), Tomasello (2018); = n/a – Pa; = Xanthium spinosum L. var. ambrosioides – Löve & Dansereau (1959), nomen nudum; < Xanthium spinosum L. – C, FNA21, K4, SE1
Wetland Indicator Status:
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