生活型

herb

形態特徵

• Perennial herbs, roots fibrous. Stems silvery green, erect, solitary or more often several strongly decumbent flowering branches from base, grayish tomentose, 15–60 cm tall.
• Basal leaves in rosettes, conspicuous first year, withered but persistent at anthesis, noticeably discolorous, oblong to spatulate, 3–10×0.8–2 mm, apex rounded to obtuse, short apiculate, base truncate, somewhat clasping, margins entire, flat or wavy toward tip; upper surface glabrescent or more commonly glabrous and bright green, midrib in a distinct furrow; lower surface appressed white tomentose, midrib white hairy, raised; cauline leaves remote, gradually diminishing in size upward, linear-oblong to spatulate, otherwise as rosette leaves. Spikes of numerous axillary clusters of heads, 3–6 cm long, more or less interrupted, leafy; leaves 0.5–3 cm long.
• Heads 2.5–3×2–2.5 mm when dry, glabrous. Involucre of 3 series; outer involucral bracts ovate-elliptic, ca. 2.5×0.6 mm, obtuse to acute; inner ones linear-oblong, rounded to obtuse, ca. 3 mm long. Outer florets 50–60, corolla ca. 2 mm long; central florets 3–5, pinkish purple, 2.1–2.5 mm long.
• Achenes oblong-elliptic, ca. 0.5 mm long, minutely glandular. Pappus white, ca. 2.5 mm long, connate at base into a ring, deciduous.

分布

• 台灣 : naturalized in the waste fields and roadsides around Yangmingshan National Park within the past decade, 400–1,000 m.
• 世界 : Native of South America, adventive elsewhere.

引證標本

TAIPEI: Yangmingshan Natl. Park, Liao 282, Luchiaokeng Stream, Peng 10480, Chingshan Rd., Chen 939; Chihsingshan, Ying 19210 (Holotype of Gnaphalium liuii S. S. Ying).

參考文獻

• PENG, Ching-I & CHUNG, Kuo-Fang; LI, Hui-Lin, Flora of Taiwan, second edition 4: 981. 1998.  (Fl. Taiwan 2nd edit.)