Shrubs or trees, tendrils absent.
Leaves alternate, entire or toothed; stipulate small and caducous. Glands on petiole.
Flowers axillary, large and conspicuous; solitary or paired. Sepal and petals 5. Corona conspicuous; single series. Annular nectar ring. Stamens >20; connate at base. 3-5 free stylodia. Bracts present.
Fruits 3 valved; oblong-ovoid.