''Anthocharis lanceolata'', the gray marble, is a

butterfly Butterflies are insects in the macrolepidopteran clade Rhopalocera from the Order (biology), order Lepidoptera, which also includes moths. Adult butterflies have large, often brightly coloured wings, and conspicuous, fluttering flight. The ...

in the family

Pieridae The Pieridae are a large family of butterflies with about 76 genera containing about 1,100 species, mostly from tropical Africa and tropical Asia with some varieties in the more northern regions of North America and Eurasia.DeVries P. J. in Levi ...

. The species was first described by Hippolyte Lucas in 1852. Its range is the west coast of United States and Canada. Note: This source gives Boisduval as the authority, but Savela gives that as a subspecies of ''Anthocharis lanceolata''.

References

Anthocharis Butterflies of North America Butterflies described in 1852 {{Pieridae-stub