Local in sandhills and quarries throughout the British Isles. In Hampshire confined to a few sites, most numerously at Micheldever Spoil Heaps, but also at Itchen Abbas, Portsdown and Oxenbourne; very rare on the Isle of Wight, where recorded only once, on Tennyson Down. Wingspan 18-22 mm. The almost unicolorous and unmarked forewing with a dark basal lobe helps to distinguish the most common forms of this species from others in the genus. Larva feeds on leaves of Perennial Sow-thistle, Dandelion and Cat's-ear, subsequently feeding in the roots.

Flightime guide
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