any of a group of butterflies in the subfamily Pierinae (family Pieridae, order Lepidoptera) that have a wingspan of 37 to 63 mm (1.5 to 2.5 inches). The orange-tips, so called because most species have an orange spot on the top of the forewings, have whitish wings with black markings and green marbling on the underside. The larvae feed on plants in the mustard family.
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