生活型

shrub

形態特徵

• Erect shrubs, 1–2.5 m tall, much branched, branches densely tomentose.
• Leaves oblong-ovate to elliptic, 6–15×2–6 cm, thinly tomentose and glandular on both surfaces, upper surface green, lower surface grayish, apex mucronulate-obtuse, margins entire or nearly so, base attenuate, petiole 1–2.5 cm long.
• Heads 5–7 mm in diam. when fresh, ca. 10 mm in diam. in dried specimen, 6 mm long; peduncle 3–8 mm long, in dense terminal and axillary corymbs. Involucre ovate to campanulate, bracts greenish purplish, 4 or 5-seriate, outer ones very widely elliptic to very widely obovate, rounded, 2–4×1.5–2 mm, tomentose abaxially, margins ciliate, inner bracts lanceolate to linear-lanceolate, acute, 4–5×0.5–1 mm, less pubescent to glabrous. Receptacle flat, glabrous. Outer florets numerous, corolla filiform, pale greenish white, pinkish toward summit, 3.5–4 mm long, 3-lobed; pappus white, slightly shorter than corolla; mature achenes not seen. Central florets ca. 20–25; corolla whitish, pinkish toward summit, 4–5 mm long, sparingly glandular hairy at base; anthers obtuse at apex, short tailed at base; anthers and style exserted; achenes vestigial.
• Chromosome number, n = 10 (Peng et al., 1998).

分布

• 台灣 : naturalized in disturbed ruderal places, often on barren mudstone slopes or associated with scrubby vegetation along roads, 50–200 m. Since its first discovery in Taiwan in 1987, the species has extended its range in lowlands of southern part of the islan
• 世界 : Native of the warmer regions of the New World and western Africa.

引證標本

CHIAYI: Chuchi, Kuanghua Village, Peng 10455. TAINAN: Tsochen Hsiang, Peng 10554; Nanhua Hsiang, Peng 10540. KAOHSIUNG: Meinung, Yuehkuangshan, Yen 4559; Neimen, Peng et al. 13437. TAITUNG: Yenping, Yenping Village, Yen 16265.

參考文獻

• PENG, Ching-I & CHUNG, Kuo-Fang; LI, Hui-Lin, Flora of Taiwan, second edition 4: 1034. 1998.  (Fl. Taiwan 2nd edit.)