- Family: Whites and Yellows – Pieridae
- Subfamily: Whites – Pierinae
- Wing span: Medium-sized, 32–47 mm (1.28–1.88 in.).
- Wing upper side: White, forewing tip varying shades of grey. Females’ forewing with 2 dark blotches, males with only one blotche or completely lacking. Wing veins often mealy grey. This characteristic becomes stronger when moving towards north. Females generally a bit darker than males.
- Wing underside: Forewing white, tip yellow. Hind wing pale yellow, wing veins mealy greyish. This property is more pronounced in the north. Females usually a little darker than males.
- Habitat: Almost all kinds of habitats, but not so common in forested areas.
- Flying time: Early May–early September. Usually most abundant during time of second generation in mid-July. Third generation also possible.
- Overwintering form: Cocoon.
- Larval foodplant: Different kinds of Mustard family plants (Brassicaceae), wild plants such as garlic mustard (Alliaria petiolata), hoary allison (Berteroa incana) and dame’s violet (Hesperis matronalis) and crops such as different cabbage species (Brassica).
The green-veined white is one of the most common butterfly species in Finland and the most common and widespread of the Whites. Although it is a lot smaller it looks a lot like large white, and the slightly larger small white, but it can be best told apart from them by the mealy grey veins on the underside of its hind wings.
Males fly around looking for females. Females lay their eggs on food plants one by one or in groups of several eggs. The caterpillars are not so common among crops as those of large whites and small whites.