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Pieris rapae
Upperside of wings white; forewing with black tip. Two submarginal black spots in female, one in male. Underside of hindwing and forewing apex evenly yellow-green or gray-green. Spring and fall short-day form is smaller, less yellow, with reduced black areas.
male
Male Pieris rapae, the Small White. Pieris brassicae has different markings at the apex of the forewing. It looks more like a triangle, than a rectangle like in yours and Pieris rapae. This marking is also extending "over" the black spot in Pieris brassicae.
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