Page author: Don Knoke
Myosoton aquaticum
giant chickweed, water chickweed
WTU specimens
Other herbaria

Distribution: Introduced in much of eastern United States; occasional in the Pacific Coast states and British Columbia.

Habitat: Stream banks, woods, marshes and wet meadows.

Flowers: June - October

Origin: Introduced from Europe

Conservation Status: Not of concern

Description:
General:

Straggling, herbaceous perennial, the stems decumbent to ascending, simple or branched, up to 6 dm. tall, pubescent above.

Leaves:

Leaves opposite, ovate, the tip acute, the lower leaves petiolate, gradually reduced upward, becoming sessile above

Flowers:

Flowers solitary in the leaf axils, long petiolate; sepals 5, green, linear-oblanceolate; petals 5, white, deeply notched, about 7 mm. long, much longer than the sepals; stamens 10; styles 5.

Fruits:

Capsule globose-ovoid, opening by 5 valves.

Identification Notes:

Capsule

Accepted Name:
Myosoton aquaticum (L.) Moench
Publication: Methodus. 225. 1794. 1794.

Synonyms & Misapplications:
Alsine aquatica (L.) Britton
Cerastium aquaticum L.
Stellaria aquatica (L.) Scop. [HC]
Additional Resources:

PNW Herbaria: Specimen records of Myosoton aquaticum in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Myosoton aquaticum checklist entry.

E-Flora BC: Myosoton aquaticum atlas page.

CalPhotos: Myosoton aquaticum photos.

USDA Plants: Myosoton aquaticum information.

3 photographs:
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