Herbs perennial, erect. Roots fragrant. Leaves alternate, cordate. Flowers borne on petiole (strictly terminal), solitary. Perianth biseriate, actinomorphic. Sepals basally connate, adnate to gynoecium and stamens forming calyx cup; lobes 3, ovate. Petals 3, free. Stamens 12 in 2 series; filaments inflated and incurved at apex; anthers functionally introrse (due to curvature). Ovary half-inferior; carpels 6, connate only at base. Fruit follicular, with persistent calyx. Seeds convex on 1 face, transversely rugose, with fleshy funicle.
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