Hypericum perforatum

Hypericum perforatum

Observation - Hypericum perforatum - UK and Ireland. Description: I think it may be Imperforate, I've seen a picture of black spots on the back of the calyx not the front, however it may be hybrid with perforate anyone know the distinguishing features for this?

I think it may be Imperforate, I've seen a picture of black spots on the back of the calyx not the front, however it may be hybrid with perforate anyone know the distinguishing features for this?