生活型

herb

形態特徵

• Perennial herbs, rhizome very short. Stems erect, rigid, 25–100 cm tall, usually divaricately branched in upper part, minutely puberulous.
• Leaves 5–15×2.5–4 cm, shallowly undulate-toothed on upper half, short setulose on both surfaces, basal leaves withered at anthesis; lower cauline leaves oblanceolate or oblong-oblanceolate, apex acute, base narrowed to petiole, middle leaves many, densely arranged, lanceolate, acuminate at both ends, gradually smaller upward.
• Heads 3–4 mm long, 4–5 mm across, solitary or in short racemes or panicles in successive leaf axils. Peduncle 5–15 mm long, pubescent. Involucre broadly campanulate, ca. 2 mm long, 3–4 mm across, bracts in 3-series, subequal, scarious, oblong, obtuse, ca. 1.6 mm long, glabrous, margins thinly membranaceous, ciliate. Ray florets many in 2 or 3 rows, corolla ligulate, rather thick, white, 0.7–1 mm long, glandular dotted, ligules entire or bifid. Disc florets bisexual, corolla yellowish, ca. 1 mm long, glandular dotted, limb campanulate, 5-lobed.
• Achenes oblanceolate-oblong, flat, 1.8–2×ca. 0.8 mm, glandular dotted. Pappus white, capillary, bristles 1.5 mm long, early deciduous.
• Chromosome number, 2n = 18 (Peng & Hsu, 1978).

物候

Fl. Jul-Jan.

分布

• 台灣 : in wet situations in mountains in the northern and central region, 700–2,200 m.
• 世界 : Southern Asia, Malaysia, Java, mainland China, the Ryukyus, Japan and Korea.

引證標本

TAIPEI: Peichatienshan, Peng 7469; Sanhsia, Leu 1587. ILAN: Yuanyang Lake, Peng 2037; Nanhutashan, Jeng 1948. TAOYUAN: Lalashan, Peng 14621. HSINCHU: Litungshanchuang, Wang 1976. MIAOLI: Erpensung, Huang 15394. NANTOU: Mayfeng, Peng 9052; Lona, Peng 16994. HUALIEN: Mukuashan, Peng 7318.

參考文獻

• PENG, Ching-I & CHUNG, Kuo-Fang; LI, Hui-Lin, Flora of Taiwan, second edition 4: 1045. 1998.  (Fl. Taiwan 2nd edit.)