Shrubs or trees, usually with slender curving branches, the bark and wood often quite bitter to the taste. Leaves alternate, odd-or even-pinnate; leaflets (3-)6-20, alternate to opposite, usually entire, chartaceous to coriaceous, petio-luled. Inflorescences long, slender, many-flowered racemes or panicles, aggre-gated to solitary, terminal to axillary. Flowers small, 3-, 4-, or 5-merous, unisexual, the plants dioecious; sepals 3-5, connate at least basally, imbricate; petals 3-5, or sometimes absent, linear to elliptic or lanceolate, ca. as long as or a little longer than the sepals, imbricate; stamens as many as and opposite the petals, reduced to staminodes or absent in carpellate flowers, exserted, the filaments inserted between and below the lobes of the small intrastaminal disc, rarely adnate to the petals, the anthers basifixed, 2-lobed, the lobes separated by a thick connective; gynoecium 2-3-carpelled, syncarpous, rudimentary or absent in staminate flowers, 2-3-lobed and-loculed, the ovules 2 per locule, pendulous, anatropous and epi-tropous, placentation axile, the style bilobed, persistent and spreading in fruit, the upper surface stigmatiferous, absent in staminate flowers. Fruit a berry, obovoid to ellipsoid, 1-3-loculed; seeds 1-3, 1 per locule, the testa membranace-ous, the endosperm absent.
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Shrubs or trees, rarely subshrubs, (2–)15–80(–220) dm. Leaves imparipinnate [paripinnate (with 1 of distal pair of leaflets oriented terminally)]; leaflets [1–]5–11[–33], alternate or subopposite, ovate to elliptic, 14–300 × 8–160 mm, base of terminal usually symmetric, of lateral ones usually oblique. Inflorescences terminal or axillary, rarely cauliflorous, [racemes or simple] compound thyrses. Flowers: sepals 5; petals 5; staminate flowers: anthers usually with enlarged connective, thecae parallel; pistils reduced to cylindric or lobed pistillodia or tufts of hairs; pistillate flowers: stamens reduced to staminodia or 0; pistils 2-or 3-carpellate, all carpels potentially fertile. Fruits berries; sepals persistent. Seeds 1–3.