生活型

herb

形態特徵

• Perennial herbs, erect, 50–120 cm tall, with a fibrous rootstock. Stems terete, usually unbranched or sometimes branched from base, densely silky-villous to woolly particularly on younger shoots.
• Leaves obovate-spatulate, 12–14×4–5 cm, apex obtuse or acute, base attenuate into petiole, margins minutely denticulate to nearly doubly denticulate, silky-villous on upper surface, densely sericeous to wooly on lower surface, veins 5 or 6 pairs.
• Heads 9–11 mm long, 5–6 mm across, in crowded axillary and terminal clusters, forming dense interrupted spicate inflorescences, sessile. Involucre globose-lanceolate, 3–4×0.6–0.7 mm, densely silky villous abaxially; inner bracts linear, 6–7 mm long, 0.5–0.6 mm wide, margins ciliate. Receptacle convex, 2–4 mm across, alveolate, glabrous. Central florets yellow, 7–8 mm long, with 5 broadly triangular lobes, lobes with colleters and sparse multicellular hairs. Outer florets 6–7 mm long, 2 or 3 lobed.
• Achenes oblong, 1–1.2×0.25 mm, ribbed, sparsely pubescent. Pappus white, 3–4 mm long.
• Chromosome number, 2n = 48 (Peng & Hsu, 1978).

分布

• 台灣 : lowland.
• 世界 : Southern and southeastern Asia and China.

引證標本

TAIPEI: Nankangshan, Peng 9136. ILAN: Lotung, Yamamoto 3768. TAOYUAN: Sanchiaoyung, Sasaki s. n. 1910. HSINCHU: Yiminmiao, Wang 1277. MIAOLI: Tsohu, Kawakamii s. n. 1908. TAICHUNG: Tali, Yamamoto & Suzuki s. n. 1933. PINGTUNG: Nanjenshan, Peng 5530. TAITUNG: Lanyu Is., Peng 10718.

引用文獻

• PENG, Ching-I & CHUNG, Kuo-Fang; LI, Hui-Lin, Flora of Taiwan, second edition 4: 878. 1998.  (Fl. Taiwan 2nd edit., 台灣植物誌第二版)