Diarsia florida, the fen square-spot, is a moth of the family Noctuidae.

Subspecies perturbata is found in south-eastern Turkey.

florida Schmidt (10 c) appears to be only a brightly coloured and well-marked form [ of Diarsia rubi ].

[1] The larvae feed on Athyrium, Betula, Calluna, Caltha, Lamium, Primula, Rubus, Rumex, Scrophularia, Struthiopteryx, Vaccinium and Urtica species.

Diarsia florida is difficult to certainly distinguish from its congeners.