Page authors: Don Knoke, David Giblin
Stellaria calycantha
northern bog starwort

Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains.

Habitat: Moist meadows and steam banks, from low to high elevations.

Flowers: May-August

Origin: Native

Growth Duration: Annual, Perennial

Conservation Status: Not of concern


Low perennial, often matted, the stems prostrate to ascending, 1-4 dm. long, glabrous.


Leaves opposite, sessile, thin, mostly glabrous, ovate to narrowly lanceolate, the margins smooth.


Flowers axillary and in terminal, leafy-bracteate cymes; pedicles slender, glabrous, 1-4 cm. long, erect to reflexed; sepals 5, lanceolate, acute, scarious-margined, 2.5-4.5 mm. long, 3-nerved; petals from nearly as long as the sepals to wanting.


Capsules narrowly ovoid, about twice as long as the sepals.

Accepted Name:
Stellaria calycantha (Ledeb.) Bong.
Publication: Mém. Acad. Imp. Sci. St.-Pétersbourg, Sér. 6, Sci. Math. 2: 127. 1833.

Synonyms & Misapplications:
Stellaria calycantha (Ledeb.) Bong. var. calycantha [HC]
Stellaria simcoei (Howell) C.L. Hitchc. [HC]
Additional Resources:

PNW Herbaria: Specimen records of Stellaria calycantha in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Stellaria calycantha checklist entry.

OregonFlora: Stellaria calycantha information.

E-Flora BC: Stellaria calycantha atlas page.

CalPhotos: Stellaria calycantha photos.

USDA Plants: Stellaria calycantha information.

17 photographs:
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