lychnis flos-cuculi(n = noun.plant) cuckoo flower, lychins floscuculi, ragged robin - common perennial native to Europe and western Asia having usually pink flowers with ragged petals;
is a kind of catchfly, lychnis

evening lychnis, genus lychnis, lychnis, lychnis alba, lychnis coronaria, lychnis dioica, scarlet lychnis