Blauwe knoop – Devil’s bit

De blauwe knoop bloeit van juli tot september met vier tot zeven millimeter grote blauwe bloemen. Er komen echter ook gele exemplaren voor en soms zelfs geelachtig witte of roodachtige. De bloemhoofdjes zijn bij het begin van de bloei half bolvormig en worden later bolvormig. Het bijzondere omwindsel (buitenkelk) is ruw behaard en heeft vier eironde stekelpuntige tanden. Aan de kelk zitten vijf borstels.

Succisa pratensis (Devil’s bit) is a perennial herb up to 1m tall, growing from a basal rosette of simple or distantly-toothed, lanceolate leaves. Its unlobed leaves distinguish it from Knautia arvensis. The plant may be distinguished from Centaurea scabiosa (greater knapweed) by having its leaves in opposite pairs, not alternate as in knapweed. The bluish to violet (occasionally pink) flowers are borne in tight compound flower heads or capitula. Individual flowers are tetramerous, with a four-lobed epicalyx and calyx and a four-lobed corolla. Male and female flowers are produced on different flower heads (gynodioecious), the female flower heads being smaller. The flowering period in the British Isles is from June until October.

33 thoughts on “Blauwe knoop – Devil’s bit

  1. Aha.. dat is het dus.. blauwe knoop! Prachtige foto!
    Ken het niet.. ik ken alleen mensen die van de blauwe knoop zijn hehe.

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