The predominantly grey underside is most like that of P. progne, P. oreas and P. gracilis; the Green Comma has a more mottled rather than a two-toned underside, and the moss-green patches in the margins of the underside will serve to distinguish it. There is some variability over this species' distribution in the province, and it is unclear at the time which subspecies names are best applied (N. Kondla, unpubl. data).