10. Ligularia retusa Candolle, Prodr. 6: 314. 1838.
黑毛橐吾 hei mao tuo wu
Cremanthodium retusum (Candolle) R. D. Good; Ligularia nigropilosa Kitamura; Senecio retusus (Candolle) Wallich ex J. D. Hooker.
Stem erect, 1 or 2, 38-100 cm tall, 3.5-12 mm in diam. at base, densely shortly black pilose or proximally glabrescent. Basal leaves petiolate; petiole 7.5-20 cm, shortly black pilose, base narrowly sheathed; leaf blade reniform, 2.2-7.5 × 4-15 cm, abaxially glabrous or shortly pilose along veins, adaxially glabrous, palmately veined, margin regularly denticulate, between teeth shortly black pilose, apex retuse; sinus ca. 1/3 as long as leaf blade, basal lobes orbicular. Middle stem leaves similar but smaller, shortly petiolate, base broadly sheathed; sheath cymbiform, 4-9 × 1.5-3 cm, shortly black pilose, rarely glabrous; leaf blade 3-9.5 × 7-16 cm. Distalmost stem leaves only broadly sheathed. Capitula 2-11(-27), solitary or in corymb, branches spreading; branches and peduncles black pilose; leaflike and supplementary bracts linear-lanceolate, less than 1 cm, shortly black pilose. Involucre hemispheric or campanulate, 1-1.5 × 1.5-2 cm, outside shortly black pilose; phyllaries 11-18, oblong or lanceolate, 2-5 mm wide, apex acute or acuminate; inner phyllaries membranous at margin. Ray florets yellow; lamina oblong or oblanceolate, 9-10 × 3-4 mm, apex subtruncate, 2- or 3-denticulate. Tubular florets numerous, yellowish brown, 5-6 mm; tube 1-1.5 mm. Achenes pale brown, cylindric, 7-10 mm, ribbed. Pappus yellow, as long as tubular corolla. Fl. and fr. Jul-Oct.
Stream banks, grassland slopes, alpine grasslands; 3800-4500 m. SE Xizang, NW Yunnan [Bhutan, NE India, Nepal].