Limosella aquatica
awl-leaf mudwort
WTU specimens
Other herbaria

Distribution: Widespread in the Northern Hemisphere; found throughout the Pacific Northwest.

Habitat: In shallow water or wet mud, in the valleys and plains.

Flowers: June - October

Origin: Native

Conservation Status: Not of concern


Tiny, glabrous, scapose perennial, with fibrous roots from a small crown.


Leaves all basal, entire, the blades narrowly elliptic, 5-18 mm. long and 2-7 mm. wide, with long, slender petioles, up to 8 cm. long.


Flowers usually solitary on long, slender, lax scapes, or sometimes in a cluster on short pedicels, in a whorl of leaves at the top of a naked stem; calyx 5-toothed, 2-3 mm. high; corolla white or pinkish, inconspicuous, the tube about equal to the calyx, the 5 lobes short and spreading; stamens 4; stigma capitate.


Capsule 2-3.5 mm. high, 1-celled toward the tip.

Accepted Name:
Limosella aquatica L.
Publication: Sp. Pl. 2: 631-632. 1753.

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Limosella aquatica in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Limosella aquatica checklist entry.

E-Flora BC: Limosella aquatica atlas page.

CalPhotos: Limosella aquatica photos.

USDA Plants: Limosella aquatica information.

16 photographs:
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