In northern Australia there grows a most remarkable group of 6 species of Utricularia with flesh-coloured flowers and an upper or lower corolla lip that has transformed into a pair of tall, erect antennae-like flower lobes. These characters are quite unusual for the genus, and there are numerous hypotheses as to the reasons for these adaptions, the most likely being sexual floral mimicry to attract a pollinator. The aim of this paper is to provide an overview of this highly unusual complex, which includes a botanical history and summarised treatments of each species to provide the reader with the key characters necessary to identify these taxa in the field.