1. Duhaldea nervosa (Wallich ex Candolle) Anderberg, Pl. Syst. Evol. 176: 104. 1991.
显脉旋覆花 xian mai xuan fu hua
Inula nervosa Wallich ex Candolle, Prodr. 5: 471. 1836; I. asperrima Edgeworth; I. esquirolii H. Léveillé; I. verrucosa Klatt.
Plants subherbaceous with tuberous roots. Stems often decumbent, 0.2-1 m, usually simple, sparsely long (2.5-3 mm) tawny pilose or strigose, sometimes with rounded densely softly hairy buds at base. Petiole 0-6 mm; leaf blade elliptic, 5-13 × 2-4.5 cm, sparsely spreading pilose on both surfaces, base narrowed and cuneate, margin distantly and shallowly serrate, apex acute or acuminate. Capitula 1 or few, loosely corymbose. Involucre 5(-8)-seriate; inner phyllaries linear-lanceolate, mainly scarious, 7-10 × 0.7-1.2 mm, pilose, tips sometimes purple, apex acute to acuminate, outer ones suberect, similar but smaller or herbaceous, dilated above, sometimes to 22 mm, apex obtuse. Ray floret corollas 3.5-4.7 mm; lamina white, 8-13.5 × 1.5-2.5 mm. Disk floret corollas yellow, 6-6.7 × 8-15 mm. Achenes 2-2.5 mm, sericeous. Pappus white, as long as disk floret, rarely shorter. Fl. Jul-Oct, fr. Sep-Dec.
Dry grassy slopes, thickets; 1000-2600 m. Guizhou, SW Sichuan, SE Xizang, Yunnan [Bhutan, India (Sikkim), Myanmar, Nepal, Thailand, Vietnam].