Plants 45--90 cm tall, glabrous. Stems branched, sulcate. Cauline leaf petiole ca. 7 cm; leaf blade 4-or 5-ternate, ca. 15 cm; leaflet blade cuneate-obovate or broadly rhombic, 0.9--1.3 × 0.5--0.7(--1) cm, thinly herbaceous, base cuneate or rounded, apex obtuse, 3-lobed; veins flat on both surfaces. Inflorescence racemelike, long. Pedicel slender, 2--4 mm. Sepals 4, purplish tinged, elliptic, ca. 3 × 1.2 mm. Stamens ca. 10; filament base filiform, apex narrowly linear; anther 1.8--2.2 mm, apex mucronate. Carpels 6--12; style circinate, ca. 2 mm, equaling ovary; stigma wingless or narrowly membranous winged. Achene stipe 1--2 mm; body lunate, compressed, 4--5 mm; veins ca. 8. Fl. May--Jul.
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