Plants 30--60 cm tall, glandular pubescent. Stems branched. Cauline leaf petiole 0.8--3 cm; leaf blade 3-ternate, 5.5--9.5 cm; leaflet blade orbicular-ovate, broadly rhombic-obovate, or orbicular-rhombic, 0.9--1.1 × 0.7--1.3 mm, thinly herbaceous, abaxially glandular pubescent, base rounded-cuneate or rounded, margin 3-lobed; lobes entire or 1-or 2-crenate; veins raised abaxially, flat adaxially. Inflorescence monochasial, ca. 3-flowered. Pedicel 7--14 mm. Sepals 4, early deciduous, white, narrowly oblong, ca. 5 mm. Stamens many, ca. 5.5 mm; filament base filiform, apex narrowly oblanceolate or linear, as broad as anther; anther white, narrowly oblong, ca. 1.5 mm, apex obtuse. Carpels 4--7; style ca. 2 mm, equaling ovary. Achene stipe ca. 0.5 mm; body falcate, compressed, ca. 4.5 mm; veins ca. 8, weak. Fl. Jun--Aug.
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