生活型

shrub

形態特徵

• Subshrub to 1.5–2.5(–3) m tall. Stems striate, center hollow, base woody, 1.5–2.5 cm in diam., puberulous or sometimes glabrate; main stems usually simple or 2–4-branched from middle.
• Leaves herbaceous, rugose, linear, 25–35×2.5–3.5 cm, apex acute, base attenuate into a short petiole, margins remotely double-serrate, sparsely pilose on upper surface, villous on lower surface, veins 24–30 pairs.
• Heads numerous, pedunculate, terminal and axillary, in a pyramidal panicle. Involucres globose-campanulate, bracts in 2 or 3 series; outer ones shorter, linear-lanceolate, 2–3 mm×0.7–0.9 mm, compressed, abaxially with numerous sessile glands and multicellular hairs; inner linear-lanceolate, 7–8 ×0.6 mm, margins scarious, margins and apices ciliate. Receptacle convex, 1.5–2 mm across, alveolate, sparsely pilose. Central florets yellowish, 6–7 mm long, with 5 triangular lobes, lobes with sessile glands and sparsely multicellular hairs. Outer florets ca. 6 mm long, 2 or 3 lobed, glabrous.
• Achenes pale brown, oblong-terete, 1.1–1.3×0.3 mm, pilose, 10-ribbed. Pappus pale brown to yellowish white, 5–6 mm long.
• Chromosome number, 2n = 18 (Peng & Hsu, 1978).

物候

Fl. and fr. Mar-May.

分布

• 台灣 : disjunctly distributed in Taiwan, along road cuts through forest, at borders of Cryptomeria plantations, riverbanks, 0–400 m, rare.

引證標本

TAIPEI: Wulai, Leu 1682; Kungliao, Peng 15410 (Holotype!). TAITUNG: Lanyu Is., Peng 7640. HUALIEN: Juisui, Peng 11670; Hsiulin, Leu 1441.

參考文獻

• PENG, Ching-I & CHUNG, Kuo-Fang; LI, Hui-Lin, Flora of Taiwan, second edition 4: 884. 1998.  (Fl. Taiwan 2nd edit.)