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Common Bistort

Common Bistort by a roadside, Windermere

Flower stems are unbranched

Flower spike

Close-up of pink tepals, stamens and anthers

Close-up of stamen filaments and anthers

Close-up of tepals, styles and capitate stigmas

Close-up of styles and capitate stigmas

Lower leaves with winged petioles

Triangular upper leaves clasping and running down stem