''Colias meadii'', the Mead's sulphur, 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 ...

found in North America. Its range includes the

Rocky Mountain The Rocky Mountains, also known as the Rockies, are a major mountain range and the largest mountain system in North America. The Rocky Mountains stretch in straight-line distance from the northernmost part of western Canada, to New Mexico in ...

s in Canada and the United States.Mead's Sulphur
Butterflies of Canada Flight period is from July to August. It inhabits arctic-alpine tundra and rocky slopes, in high mountain areas at or near tree lines. Wingspan is from 35 to 44 mm. Larvae feed on ''

Trifolium Clover or trefoil are common names for plants of the genus ''Trifolium'' (from Latin ''tres'' 'three' + ''folium'' 'leaf'), consisting of about 300 species of flowering plants in the legume or pea family Fabaceae originating in Europe. The genus h ...

'' spp. ''

Astragalus alpinus ''Astragalus alpinus'' is a species of flowering plant in the legume family known by the common name alpine milkvetch. It has a circumpolar distribution, occurring throughout the upper latitudes of the Northern Hemisphere. Distribution It is ...

'', ''

Oxytropis deflexa ''Oxytropis'' is a genus of plants in the legume family. It is one of three genera of plants known as locoweeds, and are notorious for being toxic to grazing animals. The other locoweed genus is the closely related ''Astragalus''. There are abo ...

'' and ''

Vicia americana ''Vicia americana'' is a species of legume in the vetch genus known by the common names American vetch and purple vetch. It includes a subspecies known as mat vetch. Description It is a climbing perennial forb that grows from both taproot and ...

''.''Colias''
at Markku Savela's ''Lepidoptera and Some Other Life Forms'' Adults feed on flower nectar from alpine sunflower and asters.

Subspecies

Listed alphabetically: *''C. m. elis'' Strecker, 1885 (Alberta, British Columbia) *''C. m. lemhiensis'' Curtis & Ferris, 1985 (Idaho, Montana) *''C. m. meadii'' (Colorado, Utah, New Mexico, Wyoming, Montana)

References

meadii Butterflies of North America Butterflies described in 1871 Taxa named by William Henry Edwards {{pieridae-stub