Thalictrum clavatum Hooker (1829), not de Candolle (1818); T. richardsonii A. Gray.

Plants ca. 90 cm tall, glabrous. Roots dense, ca. 10 cm. Stems branched, smooth. Basal and proximal cauline leaves withered at anthesis. Cauline leaf petiole ca. 3 cm; leaf blade 3- or 4-ternate, 6--9 cm; leaflet blade obovate or orbicular, 1.3--2 × 1.2--1.8 cm, thinly herbaceous, base cuneate, rounded, or subcordate, margin 3-lobed; lobes crenate, apex shortly acute; veins flat on both surfaces. Inflorescence few flowered. Pedicel 0.5--1.5 mm, 10--30 mm in fruit. Sepals white, ovate, 2.5--3 mm. Stamens 10--15; filament filiform; anther ovate, ca. 1 mm, apex obtuse. Carpels 4--7; style equaling ovary, ca. 1 mm. Achene stipe 2--3 mm; body obliquely obovoid or hemiobovoid, strongly compressed, ca. 7 mm; veins ca. 3. Fl. Jun.

This species is similar to Thalictrum przewalskii, but differs in being glabrous and having stamens fewer, filaments narrower, and achenes stipitate and apically curved.

Pinus forests, forest margins, slopes. E Heilongjiang, E Jilin [Korea, Russia; North America].