Thalictrum clavatum de Candolle var. acutifolium Handel-Mazzetti, Akad. Wiss. Wien Sitzungsber., Math.-Naturwiss. Kl., Abt. 1, 43: 1. 1926; T. chiaonis B. Boivin; T. clavatum var. cavaleriei H. Léveillé; T. declinatum B. Boivin; T. unguiculatum B. Boivin.

Plants 25--65 cm tall, glabrous. Roots succulent, ca. 5 × 0.4 cm thick. Stems branched, smooth. Leaves 1 or 2, basal; petiole 10--20 cm; leaf blade 2-ternate, 7--18 cm; petiolule long; leaflet blade ovate, 2.3--5 × 1--3 cm, herbaceous, base rounded, cuneate, or subcordate, apex entire or inconspicuously 3-lobed; lobes toothed; veins raised abaxially. Inflorescence monochasial, few flowered. Pedicel 3--8 mm. Sepals 4, early deciduous, white or pinkish, ovate, ca. 2 mm. Stamens many, ca. 5 mm; filament base filiform, apex oblanceolate, ca. 3 × as broad as anther; anther oblong, 0.8--1.3 mm. Carpels 6--12; style short. Achene stipe slender, 1--2.5 mm; body compressed, narrowly cylindric, 3--3.8(--4.5) × 0.6--0.8(--1.2) mm; veins ca. 8, weak. Fl. Apr--Jul.

* Forest margins, slopes, damp rocky ledges; 600--2000 m. Anhui, Fujian, Guangdong, Guangxi, Guizhou, Hunan, Jiangxi, Sichuan, Zhejiang.