- Erect perennial to 60 cm (24 in) high.
- Not hairy or only slightly hairy.
- Sticky just below each leaf junction.
- Leaves lanceolate.
- Flowers 20 mm (0.79 in) across; bright rosy red; petals notched; apparently whorled in long spikes; May-August.
Lychnis viscaria is said to increase the disease resistance of surrounding plants. Extract from L. viscaria contains a relatively high amount of brassinosteroids, which have a proven positive effect on the growth of other plants. In Germany the extract is allowed for use as a "plant strengthening substance."
- New Flora of the British Isles; Clive Stace; Third edition; 2011 printing
- The Wild Flowers of Britain and Northern Europe; Fitter, Fitter, Blamey; Collins; 3rd edition 1978