Stamens and style long-exserted; pollen spinulose
Sepals 5, subequal, with awn-like appendages
Corolla narrowly tubular at the base, tubular or urceolate above, slightly curved, with 5-toothed mouth
Ovary glabrous, 4-locular, each loculus with one ovule; style 1, filiform; stigma bicapitate
Capsule 4-locular, 4-valved, with up to 4 glabrous seeds
This monotypic genus has usually been considered a part of Ipomoea sect. Quamoclit, but the curved corolla and long-exserted genitalia are very distinctive.
Flowers in axillary, peduncled, few- to several-flowered monochasial cymes, often secund