Page author: David Giblin
Polygonum polygaloides
WTU specimens
Other herbaria

Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains.

Habitat: Meadows, vernal pools and rocky ridges, lowlands to mid-elevations in the mountains.

Flowers: June-August

Origin: Native

Conservation Status: Not of concern

Description:
General:

Glabrous, erect or ascending, usually freely branched annual 6-20 cm. tall.

Leaves:

Linear, 10-25 mm. long, 1-2 mm. broad, basally jointed; stipules lacerate, 4-8 mm. long.

Flowers:

Crowded in groups of 1-4 on the branch tips, the branches arising from the axils of obovate, prominent, strongly white-margined bracts that have a green mid-rib; perianth 2.5 mm. long, divided over half the length, the 5 segments oblong-lanceolate, with greenish center and prominent white to pink margins.

Fruits:

Achene with three sharp angles, dark brown, dull, longitudinally striate, 2 mm. long.

Accepted Name:
Polygonum polygaloides Meisn.
Publication: Prodr. 14: 101. 1856.

Synonyms & Misapplications:
(none provided)
Infraspecies:
ssp. confertiflorum    East of the Cascades, Grant and Kittitas Counties, Washington, to California, east to Montana
ssp. kelloggii    Mostly east of the Cascades, British Columbia to California, east to Montana and Arizona
Additional Resources:

PNW Herbaria: Specimen records of Polygonum polygaloides in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Polygonum polygaloides checklist entry.

E-Flora BC: Polygonum polygaloides atlas page.

CalPhotos: Polygonum polygaloides photos.

USDA Plants: Polygonum polygaloides information.

31 photographs:
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