Publication: Sp. Pl. 1: 342. 1753.
Origin: Introduced from Eurasia and Alaska
selected vouchers: WTU
Notes: Introduced to western Washington and southwest British Columbia. FNA 22: "The name Alisma plantago-aquatica has been used in a variety of North American floras. We are following, however, the treatment of I. Björkqvist (1968), in which the native distribution of A. plantago-aquatica is restricted to Eurasia."