Page author: David Giblin
Ludwigia palustris
marsh primrose-willow
WTU specimens
Other herbaria

Distribution: West side of the Cascades and along the Columbia River in Washington; widespread in North America, Africa and Eurasia.

Habitat: Marshes and bogs.

Flowers: July-September

Origin: Native

Conservation Status: Not of concern

Description:
General:

Glabrous, succulent perennial, the stems prostrate, rooting at the nodes. Leaves: Leaves opposite, entire, 2-6 cm. long, the blades ovate-elliptic to obovate, tapered gradually to broad petioles nearly as long.

Leaves:

Leaves opposite, entire, 2-6 cm. long, the blades ovate-elliptic to obovate, tapered gradually to broad petioles nearly as long.

Flowers:

Flowers sessile in the upper leaf axils, greenish, 2 mm. long; sepals 4, ovate, persistent in fruit; petals lacking; stamens 4, opposite the sepals, the filaments very short; stigma capitate; ovary inferior, 4-celled.

Fruits:

Capsule top-shaped, 2.5-4 mm. long, with 2 tiny, lateral bracteoles about half as long.

Accepted Name:
Ludwigia palustris (L.) Elliott
Publication: Sketch Bot. S. Carolina 1(3): 211. 1817.

Synonyms & Misapplications:
Ludwigia palustris (L.) Elliott var. americana (DC.) Fernald & Griscom [HC]
Ludwigia palustris (L.) Elliott var. pacifica Fernald & Griscom [HC]
Additional Resources:

PNW Herbaria: Specimen records of Ludwigia palustris in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Ludwigia palustris checklist entry.

E-Flora BC: Ludwigia palustris atlas page.

CalPhotos: Ludwigia palustris photos.

USDA Plants: Ludwigia palustris information.

21 photographs:
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