Lycaena clarki, the eastern sorrel copper, is a butterfly of the family Lycaenidae. It is found only in South Africa.
The wingspan is 21âÂÂ27 mm in males and 22âÂÂ30 mm in females. The butterfly flies year-round, peaking in summer.
Larval food is Rumex lanceolatus. The larvae vary considerably in colour, ranging from plain green to pinkish red. However, there is always a white subspiracular stripe and a dorsal line of a darker colour. Both eggs and pupa may hibernate.