Herbs, perennial, glabrous. Tuber subglobose or irregular; stem erect, herbaceous, branchless. Stem with 1 terminal leaf, bi- or triternate, rarely trifoliolate; leaflets thinly herbaceous, slightly pruinose. Inflorescence simple, racemose, terminal. Pedicel with bract at base. Flowers yellow. Sepals 6, petaloid. Petals 6, nectary-like, much shorter than sepals. Stamens distinct, opposite petals and equal in number; anthers dehiscing by 2 apical flaps. Pistil simple; ovary 1-loculed; ovules 2-4; placentation basal; style short or slender; stigma truncate. Capsule less than 8 mm in diam., valved. Seeds 2-4; aril whitish. x = 8.