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Definition of Swamp willow
1. Noun. North American shrubby willow having dark bark and linear leaves growing close to streams and lakes. 
Exact synonyms: Black Willow, Salix Nigra
Group relationships: Genus Salix, Salix
Generic synonyms: Willow, Willow Tree
Group relationships: Genus Salix, Salix
Generic synonyms: Willow, Willow Tree



