''Colias scudderii'', the willow sulphur, is a
butterfly in the family
Pieridae. It is found from
Alaska south through the
Rocky Mountains to northern
New Mexico. The habitat consists of mountain meadows and willow bogs.
[Butterflies and Moths of North America]
/ref>
The wingspan is . Adults are on wing from June to August. They feed on flower nectar.[
The larvae feed on the leaves of '' Salix'' species (including '']Salix reticulata
''Salix reticulata'', the net-leaved willow, or snow willow,Sierra Nevada Wildflowers, Karen Wiese, 2nd Ed., 2013 p. 197 is a dwarf willow, native to the colder parts of Europe, North America, and Northern Asia. It is found in the western United ...
'', ''Salix lutea
''Salix lutea'' is a species of willow known by the common name yellow willow. It is native to North America, including central Canada and parts of the western and central United States, with the exception of the Great Basin. It can be found in ...
'' and ''Salix planifolia
''Salix planifolia'' is a species of willow known by the common names planeleaf willow, diamondleaf willow, and tea-leafed willow. It is native to northern and western North America, including most of Canada and the western United States. It grow ...
''). Second, third, and fourth instar larvae hibernate.[
]
Subspecies
*''Colias scudderii scudderii'' (Colorado, Utah, New Mexico, Wyoming)
*''Colias scudderii ruckesi'' Klots, 1937 (New Mexico)
References
scudderii
Butterflies described in 1865
Butterflies of North America
{{Pieridae-stub