Dampiera flowers have three ‘petals’ (corolla lobes to the initiated) that are joined at the base and another two above that have a distinctive fold (called auricle = ear) where they touch? See the arrows; quite obvious if you use a hand lens. Inside the auricles is a specialised cup-like structure at the apex of the style known as an indusium, which collects pollen as it pushes past the stamens in bud and functions as a pollen-presenter.