[Knapweeds: The Genus Centaurea West of the Cascade Mountains of Oregon and Washington]

Short-fringed Knapweed, Tyrol Knapweed

Centaurea nigrescens

Synonyms: Centaurea dubia, Centaurea dubia ssp. nigrescens, Centaurea dubia ssp. vochinensis, Centaurea jacea ssp. nigrescens, Centaurea transalpina, Centaurea vochinensis

Short-fringed Knapweed, Tyrol Knapweed: Centaurea nigrescens (Synonyms: Centaurea dubia, Centaurea dubia ssp. nigrescens, Centaurea dubia ssp. vochinensis, Centaurea jacea ssp. nigrescens, Centaurea transalpina, Centaurea vochinensis)

Short-fringed knapweed as seen along the Springwater Trail about two miles east of Gresham, OR........October 11, 2010.

Flower head of Short-fringed Knapweed, Tyrol Knapweed: Centaurea nigrescens (Synonyms: Centaurea dubia, Centaurea dubia ssp. nigrescens, Centaurea dubia ssp. vochinensis, Centaurea jacea ssp. nigrescens, Centaurea transalpina, Centaurea vochinensis) - Flower head of Short-fringed Knapweed, Tyrol Knapweed: Centaurea nigrescens (Synonyms: Centaurea dubia, Centaurea dubia ssp. nigrescens, Centaurea dubia ssp. vochinensis, Centaurea jacea ssp. nigrescens, Centaurea transalpina, Centaurea vochinensis)

Involucral bracts of Short-fringed Knapweed, Tyrol Knapweed: Centaurea nigrescens (Synonyms: Centaurea dubia, Centaurea dubia ssp. nigrescens, Centaurea dubia ssp. vochinensis, Centaurea jacea ssp. nigrescens, Centaurea transalpina, Centaurea vochinensis) - Involucral bracts of Short-fringed Knapweed, Tyrol Knapweed: Centaurea nigrescens (Synonyms: Centaurea dubia, Centaurea dubia ssp. nigrescens, Centaurea dubia ssp. vochinensis, Centaurea jacea ssp. nigrescens, Centaurea transalpina, Centaurea vochinensis)

Close-ups of the flower heads and involucral bracts of short-fringed knapweed as seen along the Springwater Trail about two miles east of Gresham, OR......October 11, 2010.
Paul Slichter