Green-veined White
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[Piers nap ssp. sabellicae]
Occurs in England & Wales.
The Larvae feeds on Charlock, Cuckooflower, Garlic Mustard, Hedge Mustard, Large Bitter-cress, Water-cress & other cruciferous plants.
Like other "white" butterflies, the sexes differ.
The Female has two spots on each forewing, the Male only one.
The veins on the wings of the Female are usually more heavily marked.
The underside hindwings are pale yellow with the veins highlighted by black scales giving a greenish tint, hence green-veined white.
Flight period is April-June & July-September.