Its gills and perfoliate rhinophores are orange-tipped. The leaves are placed opposite and are terete and are perfoliate. These include mare's tail, spiked water-milfoil and perfoliate pondweed. Its gills are arranged around the anus and its rhinophores are perfoliate. Gypsophila perfoliata, the perfoliate gypsophila, is a species of plant in the family Caryophyllaceae. In most cases, the lower and basal leaves are petiolate or perfoliate. This nudibranch has large perfoliate rhinophores, which are usually pinkish in color. It has eight gills arranged around the anus and its rhinophores are perfoliate. Like most other broadleaved pondweeds, perfoliate pondweed is tetraploid, with 2n=52. Perfoliate pondweed is the commonest of the so-called "Magnopotamion" group of pondweeds. The rhinophores are perfoliate, but are oblong rather than round. However, perfoliate pondweed regularly hybridises with other "Potamogeton" species including "P. crispus" ("P".