Ragged-Robin (Silene flos-cuculi) is a perennial plant which can grow up to 80 centimeters high and shows its striking flowers from late spring to summer.
- Popular name(s): Ragged-Robin, Meadow Campion
- Botanical name: Silene flos-cuculi (syn. Lychnis flos-cuculi)
- Family: Caryophyllaceae
- Origin: Asia (Caucasus, Siberia), Europe and as an introduced species also in some regions in Canada and the USA.
- Height: 30 to 80 centimetres
- USDA zone: 5 (-23 °C)