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Bistorta officinalis, also known as the common bistort, is a species of flowering plant in the dock family Polygonaceae. It is native to Europe and northern and western Asia, but has also been cultivated and become naturalized in other parts of the world such as in the United States. It is typically found growing in moist meadows, nutrient-rich wooded swamps, forest edges, wetlands, parks, gardens and disturbed ground. A herbaceous perennial, it grows to a height of 20 to 80 centimetres (8 to 31 inches). It blooms from late spring into autumn, producing tall, erect, unbranched and hairless stems ending in single terminal racemes that are club-like spikes, 5 to 7 centimetres (2 to 3 inches) long, of rose-pink flowers. This B. officinalis inflorescence was photographed in the Austrian Alps.

Photograph credit: Uoaei1