Leaves paripinnate or imparipinnate, rarely bipinnate. Flowers bisexual, polygamous, or plants dioecious, actinomorphic or
zygomorphic. Receptacle cup-shaped. Sepals 4 or 5, rarely 3 or 6, imbricate. Petals usually 5, sometimes 3, rarely absent. Stamens
various in number, sometimes with staminodes; anthers basifixed, rarely dorsifixed, opening by apical pores or by lateral short
slits. Ovary or ovary stipe inserted at base of receptacle, free; ovules 2 to numerous, rarely solitary.