生活型

herb

形態特徵

• Annual or biennial herbs. Stems erect, grayish green, 25–55 cm tall, striate, often branched in upper part, villous.
• Leaves green on upper surface, pale on lower surface, white villous on both surfaces, margins apiculate-crenate; radical and lower cauline leaves in rosettes, obovate to spatulate, apex obtuse or rounded, base attenuate to winged petiole, auriculate, 4–13 cm long, 1.5–4 cm wide, sessile; gradually reduced upward, becoming lanceolate to linear-lanceolate.
• Heads globose, 4–5 mm long, 6–8 mm across, numerous, in terminal glomerules or tight corymbs; peduncle slender, 3–10 mm long, villous. Involucre hemispheric, 5–6 mm long, bracts in 2 or 3 series, scarious, imbricate, lanceolate, acute, purplish at apex, sparsely pubescent, outer bracts shorter, 3–3.5 mm long, inner bracts 4–5 mm long. Receptacle hemispheric, fimbriate. Ray florets numerous, corolla filiform, yellow, 1.5 mm long, ciliate; style 3 mm long, prominent, red-purple, nearly equalling pappus. Disc florets ca. 15, corolla funnelform, upper part ca. 1.2 mm long, lower ca. 2.5 mm long, 5-lobed, lobes ovate, red-purple, each lobe with 2 or 3 hairs.
• Achenes pale brown, obovate, flattened, ca. 0.8 mm long, ca. 0.3 mm wide, minutely puberulous. Pappus bristels white, slightly reddish, in one row, capillary, subequal, 4–6 mm long at maturity, deciduous. Flowering year round in Taiwan.
• Chromosome number, 2n = 18 (Peng & Hsu, 1978).

物候

Flowering year round in Taiwan.

分布

• 台灣 : common from low elevations to ca. 2,000 m.
• 世界 : Afghanistan, India, Thailand, Burma, Malaysia, mainland China, the Ryukyus and Japan.

引證標本

TAIPEI: Shihting, Peng 10610. TAOYUAN: Paling, Peng 11011. TAICHUNG: Wuling, Peng 12092; Kukuan, Peng 12429. NANTOU: Wushe, Peng 10355; Hsini, Peng 11401. CHIAYI: Fanlu, Peng 10062; Tungputo Chuchung, Hsu 7417. HUALIEN: Errtzeshan, Peng 5881; Taroko to Tienhsiang, Peng 12640. TAITUNG: Hsianyang, Peng 11859.

參考文獻

• PENG, Ching-I & CHUNG, Kuo-Fang; LI, Hui-Lin, Flora of Taiwan, second edition 4: 918. 1998.  (Fl. Taiwan 2nd edit.)