 Flowers have a single plane of symmetry (monosymmetric; "Brunonia" being the sole exception), and are either fan-like (e.g., "Scaevola") or bilabiate (as in "Dampiera").Corolla lobes often have two thin marginal wings, which also occur in other families of Asterales such as the Menyanthaceae and Argophyllaceae.The style bears a pollen-cup, also known as an indusium, at the tip, a unique character for the family.