Page author: David Giblin
Polemonium pectinatum
Washington Jacob's-ladder, Washington polemonium

Distribution: Known only from North Whitman County and south Spokane County, Washington.

Habitat: Moist bottom lands.

Flowers: May-June

Origin: Native

Conservation Status: Threatened in Washington (WANHP)


Taprooted perennial with clustered stems 3-8 dm. tall, glandular-hairy in the inflorescence but otherwise glabrous.


Leaves alternate and pinnate, all cauline, short-petiolate, the leaflets 11-17, linear, well spaced, 1.5-5 cm. long and up to 2 mm. wide.


Inflorescence branched and fairly open, the individual flowers with short pedicels; calyx herbaceous, 3-6 mm. long, the 5 lobes about equal to the tube; corolla white, broadly bell-shaped, 9-14 mm. long, the 5 lobes longer than the tube; stamens equaling the corolla; style 3-parted; ovary superior.


Capsule 3-celled.

Accepted Name:
Polemonium pectinatum Greene
Publication: Bull. Calif. Acad. Sci. 1(1): 10. 1884.

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Polemonium pectinatum in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Polemonium pectinatum checklist entry.

E-Flora BC: Polemonium pectinatum atlas page.

CalPhotos: Polemonium pectinatum photos.

USDA Plants: Polemonium pectinatum information.

16 photographs:
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