生活型

herb

形態特徵

• Erect herbs; stems 20–45 cm tall, dichotomously branched, strigose-scabrid.
• Radical leaves chartaceous, oblanceolate-spatulate, 7.5–18.5×2–3.3 cm, apex rounded, base narrowed, short petiolate or subsessile, margins remotely crenate-serrate, strigose-scabrid; cauline leaves scattered, fewer above, oblong to oblanceolate, middle ones 3–8 cm long, upper ones ovate-lanceolate, strigose on both surfaces.
• Heads in clusters surrounded by cordate leafy bracts, peduncle 1.5–2 cm long, bracts 3, broadly ovate, 10–14×8–10 mm; involucre narrow, 8–9×2 mm, outer 4 bracts 5.5 mm long, inner 4 bracts 8–9 mm long. Florets 4 in a head; corolla 7 mm long, lobes unequal, 2–3 mm long.
• Achenes hairy, oblong linear, 4 mm long, 0.5 mm wide; pappus bristles 4 or 5, rigid, dilated at base, 4–5 mm long.
• Chromosome number, 2n = 22 (Peng & Hsu, 1978).

分布

• 台灣 : at low elevations in the south, occasional in the north.
• 世界 : Mainly tropical and subtropical Asia from India to Japan, Malaysia and western Australia.

引證標本

TAIPEI: Pitouchiao, Peng 2135; Nankangshan, Peng 8676. CHIAYI: Agriculture Exp. Station, Yen 1855. KAOHSIUNG: Liukuei, Hsu 5072. PINGTUNG: Hengchun, Hsu 16604.

參考文獻

• PENG, Ching-I & CHUNG, Kuo-Fang; LI, Hui-Lin, Flora of Taiwan, second edition 4: 938. 1998.  (Fl. Taiwan 2nd edit.)