Centaurea montana, the perennial cornflower, mountain cornflower, bachelor’s button, montane knapweed or mountain bluet, is a species of flowering plant in the family Asteraceae, endemic to Europe. It is widespread and common in the more southerly mountain ranges of Europe, but is rarer in the north. It escapes from gardens readily, and has thereby become established in the British Isles, Scandinavia and North America. This plant has become an invasive species in British Columbia, Canada. Centaurea montana grows in meadows and open woodland in the upper montane and sub-alpine zones, in basic areas. It grows to 30–70 centimetres (12–28 in) tall, and flowers mainly from May to August.Basal leaves are large, kidney-shaped, leaf margin is toothed. The leaves are glabrous on both sides.

Centaurea montana, višegodišnji različak, planinski različak, neženja, planinska strijela ili planinska plavka, je vrsta cvjetnice iz porodice Asteraceae, endemična za Europu. Rasprostranjena je i uobičajena u južnijim planinskim lancima Europe, ali je rjeđa na sjeveru.

Центауреа монтана, вишегодишњи различак, планински различак, нежења, планинска стрелица или планинска плава, је врста цветне биљке из породице Астерацеае, ендемична за Европу. Распрострањена је и честа у јужним планинским венцима Европе, али је ређа на северу.

Centaurea montana, nevädza trváca, nevädza horská, baklažán, šípka horská alebo modrástka horská, je druh kvitnúcej rastliny z čeľade Asteraceae, endemický v Európe. Je rozšírený a bežný v južných horských pásmach Európy, ale na severe je zriedkavejší.