[Members of the Sunflower Family with Discoid Flower Heads in the Cascade Mountains of Oregon and Washington]

Knapweeds of the Cascade Mountains of Oregon and Washington

The Genus Centaurea

Involucral bracts of Meadow Knapweed: Meadow Knapweed: Centaurea xgerstlaueri

Meadow Knapweed: Centaurea xgerstlaueri

Blessed Thistle: Centaurea benedicta (Synonym: Cnicus benedictus)

Bachelor's Button, Cornflower, Garden Cornflower: Centaurea cyanus -

Diffuse Knapweed, Tumble Knapweed, White Knapweed: Centaurea diffusa (Synonym: Acosta diffusa) -

Hybrid Knapweed, Meadow Knapweed, Protean Knapweed: Centaurea xgerstlaueri (Synonyms: Centaurea debeauxii ssp. thuillier, Centaurea xmoncktonii, Centaurea nigra x Centaurea jacea, Centaurea xpratensis, Centaurea pratensis) -

Brown Knapweed, Brownray Knapweed: Centaurea jacea (Synnoyms: Centaurea jacea nothossp. pratensis, Centaurea jacea ssp. jacea, Centaurea jacea ssp. nigra) -

Maltese Starthistle, Maltese Star-thistle, Tocalote: Centaurea melitensis -

Montane Starthistle, Mountain Bluet, Mountain Cornflower, Perennial Cornflower: Centaurea montana -

Yellow Star Thistle, St. Barnaby's Thistle: Centaurea solstitialis -

Spotted Knapweed: Centaurea stoebe ssp. micranthos (Synonyms: Centaurea biebersteinii, Centaurea maculosa) -

Paul Slichter E-mail