The flowers of the ragged robin.
a perennial plant (Lychnis flos-cuculi) of the pink family, with loose clusters of pink or red flowers
A perennial plant (Silene flos-cuculi syn. Lychnis flos-cuculi) in the pink family, native to Europe and also found in eastern North America, having opposite leaves and pink flowers with deeply lobed petals.
(plural ragged robins)