Leptidea morsei (Fenton's wood white) is a butterfly of the family Pieridae. It is found from central Europe to Siberia, Ussuri, Korea, northern China and Japan.

The wingspan is 46–54 mm. Adults are on wing from April to May and again from June to July in two generations per year.

The larvae feed on legumes, including Lathyrus niger, Lathyrus hallersteinii and Lathyrus vernus in Europe. Other recorded food plants include Vicia cracca, Vicia japonica and Vicia amoena. Hibernation takes place in the pupal stage.

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