Page author: David Giblin
Centaurea ×gerstlaueri
hybrid knapweed, meadow knapweed, protean knapweed

Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Idaho and Montana; also in eastern North America.

Habitat: Roadsides, fields, ditches, meadows, wastelots, and other disturbed open areas at low to middle elevations.

Flowers: June-September

Origin: Introduced from Europe

Growth Duration: Perennial

Conservation Status: Not of concern


[none provided]

Accepted Name:
Centaurea ×gerstlaueri Erdner
Publication: Mitt. Bayer. Bot. Ges. xxxiv. 425, ex Bot. Centralbl.xcviii. 604. 1905.

Synonyms & Misapplications:
Centaurea debeauxii Godr. & Grenier ssp. thuillieri Dostál
Centaurea ×moncktonii C.E. Britton [FNA19]
Centaurea nigra L. × Centaurea jacea L.
Centaurea pratensis Thuill., superfluous renaming (illegitimate) [HC]
Additional Resources:

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

WA Flora Checklist: Centaurea ×gerstlaueri checklist entry.

OregonFlora: Centaurea ×gerstlaueri information.

E-Flora BC: Centaurea ×gerstlaueri atlas page.

CalPhotos: Centaurea ×gerstlaueri photos.

USDA Plants: Centaurea ×gerstlaueri information.

19 photographs:
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