生活型

herb

形態特徵

• Perennial rhizomatous erect herbs, stems terete, slightly flexuous, 30–80 cm tall, branching upward glabrous in toward base, scarcely minutely puberulous upward.
• Radical leaves thick chartaceous, long-petiolate, palmately 5-nerved, narrowly ovate to oblong, acuminate, smaller than median cauline leaves, withered at anthesis. Cauline leaves apparently 3-nerved, sometimes palmately 5-nerved, thick chartaceous, dark green on upper surface, olive-green on lower surface, veins evident but not raised on lower surface, narrowly ovate to oblong-lanceolate, apex long caudate-acuminate, base rounded, rarely cordate, sometimes asymmetrical, margins serrate with ten or more pairs of teeth, 7–16 cm long, 3–7 cm wide, glabrous on both surfaces, long-petiolate; petiole not winged, 4–8 cm long on lower leaves, 2–4 cm long on upper leaves, glabrous; upper leaves fewer, smaller, lanceolate, petiolate; leaves on branches linear, bract-like, 2–10 mm long.
• Heads many, 6–8 mm long, 8–12 mm across, arranged in panicles, peduncle slender, 5–10 mm long. Involucre narrowly campanulate, 3–4 mm tall, 2.8–3.6 mm across, bracts in 3 or 4 rows, green, purplish on upper part, herbaceous, somewhat crustaceous, narrowly lanceolate, apex obtuse to acute, entire, glabrous or minutely pubescent, upper margins ciliolate, inner bracts gradually longer 3.5–4 mm long, 0.7 mm wide, outer bracts 1.5–2.5 mm long, 0.5–0.6 mm wide. Ray florets 10–15, in one row, ligules white, 4.5–6.5 mm long, 1–1.5 mm wide, tube 2 mm long. Disc florets yellow, ca. 6 mm long, unequally 5-lobed.
• Achenes cylindric, slightly compressed, 2.5–3 mm long, 0.6 mm broad, 4-ribbed, dark brownish, sparsely hirsute. Pappus dirty-white, 4–5 mm long at maturity.

物候

Fl. Aug-Dec.

分布

• 台灣 : high mountains, 2,000–2,700 m.

引證標本

ILAN: Mt. Chung-yang-chien, Tamura & Koyama 23727. NANTOU: Kuankao, Peng 8147. CHIAYI: Mt. Yushan, Kawakami & Mori 1850 (TYPE!), Peng 4575. KAOHSIUNG: Fukuyama 4733. TAITUNG: Hsiangyang, Peng 11842. HUALIEN: Mt. Mukuashan, Peng 7290.

參考文獻

• PENG, Ching-I & CHUNG, Kuo-Fang; LI, Hui-Lin, Flora of Taiwan, second edition 4: 852. 1998.  (Fl. Taiwan 2nd edit.)