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Herbs perennial. Rhizome robust, creeping, with numerous fibrous roots. Stems simple, erect. Basal leaves scaly; cauline leaves alternate, 2 or 3 × ternate, long petiolate. Inflorescence racemose, simple or branched. Flowers small, actinomorphic. Sepals usually 4, petaloid, white, caducous. Petals 1--6, spatulate, yellow, smaller than sepals, without a nectary. Stamens numerous; filaments narrowly linear-filarious; anthers yellowish white, ovate-orbicular. Carpels 1; ovary ellipsoid, glabrous, stigma sessile, compressed, 2-lobed. Fruit a berry, purple-black, red, or white when ripe, subglobose. Seeds several, ovate, brown or black.
Sep 3–5, obovate, petaloid, caducous; pet 4–10, deciduous, spatulate to obovate, clawed; stamens numerous, the elongate filaments mostly widened upwards; anthers oval; pistil 1; stigma broad, sessile, bilobed; fr 1-to several-seeded berry; poisonous, odoriferous perennial herbs with large, ternately 2–3 times compound lvs, sharply toothed lfls, and small, white fls in a dense, long-peduncled, terminal raceme. 5, circumboreal.
