Calystegia R.Br.
Fls solitary, subtended by 2 large bracts enclosing calyx, on axillary peduncles. Sepals or calyx-lobes subequal; corolla funnelform, 5-angled. Staminal filaments dilated at base. Ovary 1- or imperfectly 2-loculed and 4-ovuled. Style filiform; stigmas 2, broad. Capsule subglobose, us. 1-celled, seed glab. Twining lianes or prostrate to rambling us. glab. herbs with alt. entire or lobed lvs. Some 10 spp., mostly of temperate regions. No N.Z. sp. is endemic.