生活型

herb

形態特徵

• Perennial rhizomatous erect herbs, stems terete, 30–70 cm tall, hirsute, branching upward.
• Radical leaves few to 8, present at anthesis, apex acute, oblong to spatulate, base narrowly elongate, margins remotely serrate with 2 or 3 pairs of shallow teeth, 6–10 cm long, 1.5–2.5 cm wide. Cauline leaves elliptic to oblong, sometimes ovate, apex acute, base cuneate to obtuse, sessile or short petiolate, margins dentate apically with 2–3 pairs of teeth, 4.5–6.5 cm long, 1.5–2.5 cm wide, upper surface dark green, chartaceous, lower surface pale, somewhat sponge-like, sparsely hirtellous and pitted glandular punctate on both surfaces, 3-nerved, veins inconspicuous. Leaves gradually smaller upward.
• Heads few to many in loose corymbs, 1.5–2.2 cm across; peduncle 1.5–3 cm long, strigillose. Involucre hemispheric to bowl-shaped, 3–5 mm tall, 4.5–6 mm across. Phyllaries herbaceous with scarious margins, strigillose, ciliolate, 3–4 seriate, linear to subulate, outer bracts smaller, ca. 1.5 mm long, inner bracts 2.5–3.5 mm long, ca. 0.5 mm wide. Ray florets 8–14, 1-seriate, ligules white, 10 mm long, 1.5–1.8 mm wide. Disc florets greenish. Corolla 2.8 mm long. Pappus dirty white, 2.5–3 mm long.
• Achenes reddish brown, 2–2.5 long, 0.8–1 mm across, compressed obovoid, densely strigillose, glandular punctate.

物候

Fl. Jun-Aug.

分布

• 台灣 : moist rocky mountain ridges, 500–800 m in northern Taiwan, rare.

引證標本

TAIPEI: Manyuehyuanshan, Ying s. n. 1984 (Holotype!), Kao 570; Huangtitien, Bartholomew 7837.

參考文獻

• PENG, Ching-I & CHUNG, Kuo-Fang; LI, Hui-Lin, Flora of Taiwan, second edition 4: 866. 1998.  (Fl. Taiwan 2nd edit.)