Page authors: Don Knoke, David Giblin
Centaurea stoebe
spotted knapweed
WTU specimens
Other herbaria

Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.

Habitat: Forest openings, meadows, fields, roadsides, wastelots, and other disturbed open areas from low to middle elevations.

Flowers: June-October

Origin: Introduced from Europe

Conservation Status: Not of concern

Description:
General:

Tap-rooted, branched perennial, 3-15 dm. tall.

Leaves:

Leaves simple, pinnatifid, with narrow lobes, or the reduced ones of the inflorescence entire, often with glands in small pits.

Flowers:

Heads terminating the numerous branches; involucre 10-13 mm high, the middle and outer bracts with short, dark, comb-like tips; flowers usually pink-purple; pappus bristles up to 2 m. long; receptacle densely bristly.

Fruits:

Achene.

Accepted Name:
Centaurea stoebe L.
Publication: Sp. Pl. 2: 914. 1753.

Synonyms & Misapplications:
(none provided)
Infraspecies:
ssp. australis – spotted knapweed    Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.
Additional Resources:

PNW Herbaria: Specimen records of Centaurea stoebe in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Centaurea stoebe checklist entry.

E-Flora BC: Centaurea stoebe atlas page.

CalPhotos: Centaurea stoebe photos.

USDA Plants: Centaurea stoebe information.

39 photographs:
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