Page author: David Giblin
Epilobium palustre
marsh willowherb

Distribution: Both sides of the Cascades in Washington; Alaska east to the Atlantic coast; south in the Rocky Mountains to Colorado.

Habitat: Wet soil, often in bogs.

Flowers: June-August

Origin: Native

Conservation Status: Not of concern


Herbaceous perennial from slender rhizomes, the stems 1-4 dm. tall, gray from fine, appressed hairs.


Leaves mostly opposite, sessile, entire to denticulate, obtuse, linear to lanceolate, 2-6 cm. long and 4-6 mm. broad.


Inflorescence loosely racemose to paniculate; pedicels slender, 1-4 cm. long; calyx tube 1-1.5 mm. long, the 4 lobes twice as long; petals 4, 3-5 mm. long, notched, white to pinkish; stamens 8; styled shorter than the petals; stigma 1 mm. long, shallowly 4-lobed; ovary inferior, 4-celled.


Capsule 3-6 cm. long, linear, grayish; seeds with a tuft of white to tawny hairs at the tip.

Accepted Name:
Epilobium palustre L.
Publication: Sp. Pl. 1: 348. 1753.

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Epilobium palustre in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Epilobium palustre checklist entry.

E-Flora BC: Epilobium palustre atlas page.

CalPhotos: Epilobium palustre photos.

USDA Plants: Epilobium palustre information.

16 photographs:
Group by