Page authors: Don Knoke, David Giblin
Nabalus hastatus
western white lettuce, western rattlesnake-root
Specimens
Photos

Distribution: Occurring west of the Cascades crest and east in the Columbia River Gorge in Washington; Alaska to Oregon, east to Alberta, Idaho, and Montana.

Habitat: Streambanks, forest edge, and moist, shaded places from the lowlands to middle elevations in the mountains.

Flowers: July-September

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Bees, flies, beetles, wasps

Description:
General:

Single-stemmed perennial with milky juice, the stem 1.5-8 dm. tall, with fine, woolly hairs in the inflorescence, otherwise glabrous.

Leaves:

Leaves alternate, thin, the lower petiolate, the petiole often wing-margined, the blade deltoid to sagittate, irregularly toothed, up to 12 cm. long and 11 cm. wide; upper leaves reduced and narrower, tapering to a sessile or short-petioled base.

Flowers:

Inflorescence open and flat-topped, with several heads; heads 10- to 15-flowered, the corollas all ligulate, white or purplish; involucre 10-13 mm. high, with about 8 principlal bracts; pappus of numerous, off-white, capillary bristles.

Fruits:

Achenes elongate, cylindrical, glabrous.

Accepted Name:
Nabalus hastatus (Less.) A.Heller
Publication: Muhlenbergia 1: 8. 1900.

Synonyms & Misapplications:
Nabalus alatus Hook.
Prenanthes alata (Hook.) D. Dietr.
Prenanthes lessingii Hultén
Sonchus hastatus Less.
Additional Resources:

PNW Herbaria: Specimen records of Nabalus hastatus in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Nabalus hastatus checklist entry.

OregonFlora: Nabalus hastatus information.

E-Flora BC: Nabalus hastatus atlas page.

CalPhotos: Nabalus hastatus photos.

USDA Plants: Nabalus hastatus information.

32 photographs:
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