峨眉唐松草 e mei tang song cao

Plants 50--80 cm tall, glabrous. Stems branched. Leaves both basal and cauline; stipules 1--2.5 mm wide; petiole 10--12 cm; leaf blade 3-ternate, 16--25 cm; leaflet blade cuneate-obovate, obovate, or broadly ovate, 3--6.8 × 2--5 cm, papery, base broadly cuneate, apex 3-lobed; lobes toothed; veins raised abaxially, flat adaxially. Inflorescence paniculate, many flowered. Pedicel 4--5 mm. Sepals 4, early deciduous, white, obovate, ca. 3 × 2 mm. Stamens many, 2--5 mm; filament base filiform, apex clavate, narrower than anther; anther yellow, elliptic, 0.5--0.8 mm, apex obtuse. Carpels 12--16; style straight or slightly curved, shorter than ovary. Achene body narrowly ovoid, 1.5--2.5 mm; veins ca. 6. Fl. Jul, fr. Aug.

* Streamsides, damp rocky ledges; 700--2000 m. C Sichuan (Emei Xian, Hongya Shan).

This species is similar to Thalictrum faberi and T. grandidentatum, but differs in having leaflets cuneate-obovate, obovate, or broadly ovate, with the lobe teeth apically rounded.