E-Flora BC: Electronic Atlas of the Flora of British Columbia

Mentha aquatica L.
water mint (lemon mint)
Lamiaceae (Mint family)

Introduction to Vascular Plants

© Virginia Skilton  Email the photographer   (Photo ID #11990)

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Distribution of Mentha aquatica
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Species Information

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Perennial herb from a creeping rhizome; stems erect, 15-90 cm tall, simple or branched, 4-angled; strongly lemon-scented, but not pungent.
Opposite, usually egg-shaped, 2-6 (9) cm long, 1-4 cm wide, more or less hairy, toothed, tips pointed or rounded, bases wedge-shaped to somewhat lobed; stalked.
Inflorescence of a terminal head of 1 to 3 flower clusters and usually 1 to 3 axillary flower clusters below; lower bracts leaf-like, upper lanceolate or linear-lanceolate, hidden by the flowers; flower stalks hairy; corollas tubular, light purple, 4-lobed, the lobes nearly equal; calyces bell-shaped, nearly equally 5-toothed, hairy.
Nutlets, 4 clustered together, egg-shaped.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Wet to moist riverbanks and shorelines in the lowland zone; rare in SW BC, known only from the lower Fraser Valley; introduced from Europe.

Source: The Illustrated Flora of British Columbia


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Mentha piperi var. citrata (Ehrh.) Boivin (pro nm.)
Mentha aquatica var. crispa (L.) Benth.
Mentha citrata
Mentha crispa L.
Mentha dumetorum Schult.
Mentha piperata subsp. citrata
Mentha piperita subsp. citrata (Ehrh.) Briq.
Mentha var. citrata

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References