The seasonal dimorphism is more marked: the first generation ( "hutchinsoni" form, May-June) has the upperside fawn orange and the underside brown-gold and the hindwing bears distally a broad dark red-brown area in which is situated a row of light brown hastate spots, the underside is dark, being either unicolorous or prominently marmorated. , while the second generation (form "c-album" (July, in autumn and spring after overwintering) has a more reddish upper and dark brown underside (ground-colour is less bright). In the summer-form the wings are less dentate, and the hindwing has a narrow dark submarginal band, near which stands a row of light lunules proximally bordered by a band of brown arcs; the underside is of a paler colour, being less distinctly — sometimes, however, very prominently — marmorated and shaded.