Plants ca. 50 cm tall, glabrous. Stems branched, slender. Basal leaves withered at anthesis. Cauline leaf stipules membranous; petiole 3.5--5 cm; leaf blade 3-or 4-ternate, 8--14 cm; petiolule 3--20 mm; leaflet blade rhombic-obovate, broadly obovate, or orbicular, 1--3 × 1--2.5 cm, herbaceous, papery, or leathery, base cuneate, rounded, or subcordate, apex entire or 1--3-toothed; veins raised abaxially. Inflorescence an umbel of monochasia. Pedicel slender, 10--35 mm. Sepals 4, deciduous, white or purplish tinged, elliptic, 3--6 mm. Stamens many; filament slightly broader than anther; anther narrowly oblong, ca. 1 mm. Carpels 2--5; style straight; stigma narrowly elliptic or linear. Achenes shortly stipitate; body fusiform, 4--5 mm. Fl. May--Jun.
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