Plants ca. 1 m tall, glabrous. Stems branched. Distal cauline leaves with axillary buds; leaf blade 3-pinnate; leaflet blade variously cuneate-oblong, cuneate-obovate, orbicular-ovate, or cordate, 1--3 cm, herbaceous, margin acutely or obtusely toothed, apex 3-lobed; veins slightly raised abaxially. Inflorescence paniculate, many flowered. Pedicel filiform, 4--10 mm. Sepals 4, pinkish tinged, ovate; 5--8 × 2.5--4 mm. Stamens many, ca. 4.5 mm; anther yellowish, narrowly oblong, 1.5--2 mm, apex obtuse or mucronate. Carpels 6--8; style shorter than ovary. Achene stipe ca. 0.6 mm; body hemiobovoid, ca. 4 mm. Fl. Aug.
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