生活型

shrub

形態特徵

• Perennial herbs or subshrub, erect, 1–2.5 m tall. Stems striate, green, woody at base, hollow in center, 1–25 cm in diam., glabrate or puberulous particularly on younger parts and in inflorescence, usually unbranched except for inflorescence.
• Leaves herbaceous, dark green on upper surface, narrowly oblong to oblanceolate, 20–30×4–8 cm, base attenuate into auricled petiole, apex acuminate, margins minutely serrate-dentate, upper surface often rugose and glabrous, lower surface glabrate or puberulous with sparse multicellular hairs, veins 14–16 pairs.
• Heads numerous, 7.5–8.5 mm long, 2.5–3.5 mm across, terminal, in a pyramidal panicle. Involucre campanulate-globose, bracts in 2 or 3 series; outer ones shorter, ovate-lanceolate to linear, 6.5–7.5×0.5 mm, with prominent scarious margins, margins and apices ciliate. Receptacle flat, 1.5–2.5 mm across, alveolate, fimbriate or densely pilose. Central florets yellowish, 6.5–7.5 mm long, with 5 broadly triangular lobes, lobes with sessile glands and remote multicellular hairs. Outer florets 6–7 mm long, 2–3 lobed, glabrous. Anthers sagittate, tailed.
• Achenes oblong, 1×0.3–0.4 mm, 10-ribbed, pubescent. Pappus pale to yellowish-white, 5 mm long.
• Chromosome number, 2n = 18 (Peng & Hsu, 1978).

分布

• 台灣 : forests at lower elevations.
• 世界 : Southern and southeastern Asia, and China.

引證標本

TAIPEI: Wulai, Peng 8370; Nankangshan, Peng 9030. ILAN: Nanao, Peng 13773; Suao, Huang 5057. TAOYUAN: Hsiayunping, Peng 10296. NANTOU: Kuantaohsi, Hsu 10611. CHIAYI: Chiehtung, Peng 8876; Fanlu, Ho 1128. TAINAN: Tsengwen Reservoir, Kuo 11300. KAOHSIUN: Taoyuan, Ho 930. PINGTUNG: Hengchun, Sasaki s. n. 1911. TAITUNG: Lanyu Is., Leu 1390. HUALIEN: Taroko, Peng 9317.

引用文獻

• PENG, Ching-I & CHUNG, Kuo-Fang; LI, Hui-Lin, Flora of Taiwan, second edition 4: 884. 1998.  (Fl. Taiwan 2nd edit., 台灣植物誌第二版)