生活型

herb

形態特徵

• Annual herbs, erect, 0.5–1.5 m tall. Stems striate, often branched from base, pilose with multicellular hairs and stipitate glands; branches sometimes ascending.
• Leaves membranaceous, 12–20×6–8 cm, apex obtuse, base attenuate into petiole, margins often runcinate-lyrate and distantly dentate, teeth apiculate, veins 8–10 pairs, pilose on both surfaces.
• Heads numerous in terminal, dense to lax panicles, pedunculate; peduncles villous, glandular. Involucral bracts in 2 or 3 series, outer ones shorter, linear-lanceolate, 2–3×0.6 mm, villous on outer surface; inner ones longer, linear, 7–8×0.6 mm, margins ciliate. Receptacle convex, 3–4 mm across, alveolate, pilose around alveolae or sometimes glabrous. Central florets yellow, 7–8 mm long, with 5 broadly triangular lobes, lobes with sessile glands and remote multicellular hairs; outer florets 7 mm long, 3–5 lobed, glabrous.
• Achenes oblong, 1×0.3 mm, 10-ribbed, brown, sparsely hirsute. Pappus white, 3–4 mm long.
• Chromosome number, 2n = 18 (Peng & Hsu, 1978).

分布

• 台灣 : wastelands near sea level to 1,500 m throughout the island.
• 世界 : Southern and southeastern Asia and China.

引證標本

TAIPEI: Shihting, Peng 10597; Sanhsia, Leu 1577; Keelung, Haiyang University, Peng 6187. ILAN: Jentse, Liu s. n. 1980. TAOYUAN: Fuhsing, Leu 1742; Paling, Peng 11148. HSINCHU: Kuanhsi, Leu 1647; Chutung, Peng 8633. MIAOLI: Sanyi, Lin 1031; Shihtan, Peng 4752. TAICHUNG: Kukuan, Peng 8732; Taiping, Yang & Ma s. n. 1911. NANTOU: Shuili, Peng 11384; Tungpu, Peng 6469. YUNLIN: Taihsi, Ou s. n. 1981; Kukeng, Ou s. n. 1981. CHIAYI: Chuchi, Leu 1599; Agriculture School, Leu 1736. TAINAN: Nanhua, Peng 10552; Hsinhua, Peng 13291. KAOHSIUNG: Liukuei, Chuang 3186; Tengchih, Peng 11281. PINGTUNG: Hengchun, Leu 1335; Neipu, Lin 483. TAITUNG: Lanyu Is., Leu 1377. HUALIEN: Taroko, Peng 12639; Fengpin, Peng 2629.

參考文獻

• PENG, Ching-I & CHUNG, Kuo-Fang; LI, Hui-Lin, Flora of Taiwan, second edition 4: 882. 1998.  (Fl. Taiwan 2nd edit.)