Sagittaria engelmanniana J.G. Smith. clade: Sagittifolia Group. Blackwater Arrowhead, Engelmann's Arrowhead. Phen: Jun-Oct. Hab: Blackwater streambanks, sphagnum bogs, pocosins, beaver ponds. Dist: MA and NY south to s. FL and s. AL, primarily on the Coastal Plain (rarely disjunct inland).

Origin/Endemic status: Native

Synonymy: = C, F, FNA22, K1, K3, K4, NE, NY, RAB, Va, W, Beal, Wooten, & Kaul (1982), Keener (2005); = n/a – Pa; = Sagittaria engelmanniana J.G.Sm. ssp. engelmanniana – G, GW1, Bogin (1955); = Sagittaria longirostra – S; < Sagittaria australis (J.G.Sm.) Small – WH3

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