True forget-me-not's yellow eye is a multi-purpose structure. It's color and the petal folds around it tell the pollinators, "Here it is!". The eye leads to a tube that helps the flower keep its powder dry. It also forces the invading tongue of the insect to contact the anthers and stigma as it enters successive flowers. If you spend much time around mud and shallow water you know that this is all very effective.
The species name, scorpioides, refers to the structure of the inflorescence. It coils into itself like the scorpion's tail, unfurling as the individual flowers open. This continues through the season. This image was taken in mid-September. Late flowers sometimes tend to be paler, or even a little pink.