Senecio nikoensis var. formosanus Sasaki
Stoloniferous, biennial herbs from tap roots; stem solitary, erect, 10-60 cm tall, simple or branched above, crisp puberulent. Petiole 1.5-2 cm long, median and lower cauline leaves 3-15×2-6 cm, green on upper surface, lower surface pale, puberulous on both surfaces, pinnate or sub-bipinnatiparted, segments spreading, 4 to 6 pairs, linear-oblong, toothed or incised, white hairy, acute to obtuse, thinly membranaceous. Heads usually many, rarely few, 0.8-1 cm across, nearly umbellately arranged; peduncle 13-22 mm long, slender, bractless. Involucre cupuliform, 3×5 mm, ecalyculate, bracts in 1 series, narrowly oblong, acuminate. Ray florets ca. 13, corolla tube 2.5 mm long; rays oblong, 2 mm long, 1 mm broad. Involucral bracts 13, uniseriate, narrowly oblong, 3-4×1 mm, herbaceous, ciliate, with hyaline margins, glabrous externally. Disc florets: corolla yellow, 3.5 mm long, tube 2.5-3.1 mm long, lobes 5, ovate-triangular, 0.5 mm long, acute. Anthers oblong, 0.5 mm long, obtuse to rounded at base. Style branches 0.5 mm long. Pappus white, 5 mm long. Achenes cylindric, 1-1.2 mm long, puberulous. Pappus white, 4.5-5 mm long, bristles unequal.
NANTOU: Yunhai to Tienchih, Ho 604; Nengkaoshan, Keleey 223-98(B).
Endemic; in mountains, 2,300-2,900 m, on sunny slopes, rare.