Page authors: Don Knoke, David Giblin
Lysimachia punctata
large yellow-loosestrife

Distribution: Scattered localities across Washington; British Columbia south Oregon, east to Montana; scattered throughout central and eastern North America.

Habitat: Old fields, roadsides and stream banks.

Flowers: July-August

Origin: Introduced

Growth Duration: Perennial

Conservation Status: Not of concern


Erect, glabrous, perennial herbs from rhizomes, the stems simple, 1.5-10 dm. tall, pubescent, and with a few stalked glands.


Leaves whorled, on petioles 0.5-1.6 cm. long; leaf blades lanceolate to ovate, 5-10 cm. long and 1-4 cm. wide, the base rounded, the tip acute; leaf surfaces densely pubescent, with stalked glands and reddish spots.


Flowers 1 or more in the leaf axils, on pubescent pedicles 1-3.5 cm. long; sepals 5, narrowly lanceolate, 5-8 mm. long; petals 5, yellow, widely spreading, 12-20 mm. long, the margins entire, the tip acute to rounded; stamens 5, the filaments united for the lower 2-2.5 mm., shorter than the petals.


Capsule 4-5.5 mm. long, with dark reddish spots, glabrous.

Accepted Name:
Lysimachia punctata L.
Publication: Sp. Pl. 1: 147. 1753. 1753.

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Lysimachia punctata in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Lysimachia punctata checklist entry.

E-Flora BC: Lysimachia punctata atlas page.

CalPhotos: Lysimachia punctata photos.

USDA Plants: Lysimachia punctata information.

8 photographs:
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