Page authors: Don Knoke, David Giblin
Mertensia paniculata
paniculate bluebells, tall bluebells

Distribution: Alaska to Oregon, east to Montana; also in the Great Lakes region

Habitat: Streambanks and wet meadows at mid-elevations in the mountains

Flowers: May - August

Origin: Native

Conservation Status: Not of concern


Perennial from a stout rhizome and branched base, the numerous stems 2-15 dm. tall, glabrous or hairy.


Leaves thin, prominently veined, the basal ones, if present, long-petiolate and cordate; cauline leaves numerous, short-petiolate, the blade lanceolate to broadly ovate, pointed, 3-14 cm. long and 1.5-7 cm. wide, rounded at the base, gradually reduced upward.


Inflorescence branched and open; calyx 2-6 mm. long, cleft over half way to the base; corolla blue, 5-lobed, 9-16 mm. long, the limb 1.2 to 1.6 times as long as the tube; tube often with a ring of hairs below the middle within; filaments broad, shorter than the anthers; style longer than the corolla lobes; nutlets attached to the lower half of the style; hairy appendages opposite the corolla lobes at the top of the tube.


4 nutlets.

Accepted Name:
Mertensia paniculata (Aiton) G. Don

Synonyms & Misapplications:
(none provided)
var. borealis – tall lungwort    British Columbia to Oregon, east to Montana
var. paniculata – panicled lungwort
Additional Resources:

PNW Herbaria: Specimen records of Mertensia paniculata in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Mertensia paniculata checklist entry.

E-Flora BC: Mertensia paniculata atlas page.

CalPhotos: Mertensia paniculata photos.

USDA Plants: Mertensia paniculata information.

48 photographs:
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