生活型

herb

形態特徵

• Perennial, erect herbs or shrubs, to 2-3 m tall. Stems terte, often striate.
• Leaves simple, opposite below, becoming subopposite or alternate above; petiole 1-2 cm, puberulent; blades ovate to narrowly oblong, 7-14 cm long, 2-6 cm wide, acuminate at apex, base often decurrent onto petiole, the margins serrulate to serrate, 3-veined from well above base, the upper surface strigose, the lower surface puberulent.
• Inflorecence a corymbose panicle, terminal or arising from upper nodes, heads short-pedicellate. Involucral bracts 12-18, subimbricate, cylindric-obconic, in 3-4 series, persistent, 3-5-striate, elliptic to ovate. Florets 7-13 in a head, corolla white, bisexual, narrowly funnelform with a narrow tube, ca. 4 mm long, shortly 5-lowed, the lobes triangular, glabrous or lobes sometimes glandular.
• Anthers included, ilaments slender, collars narrowly cylindrical, the apical appendages ovate-oblong, longer than wide. Style erect and exserted, the base puberulous, branches filiform. Achenes elongate obconical, ca. 2 mm long, 5-ribbed, glanduliferous, without setulae, carpopodium distinct, pappus of many slender scabrous bristles, persistent, about as long as corolla and much longer than the achene.

物候

Flowering period is between September and January.

分布

• 台灣 : it occurs at ca. 1,300-1,400 m altitudes in the Central Mountain Range. It can reach 2 m tall on open slopes, along road cuts or landslide areas.
• 世界 : in Panama, Colombia, Venezuela, Ecuador, Peru, Bolivia, Brazil, Uruguay, to Argentina, and adventive in Indonesia, Sumatra, Ceylon and Sri Lanka.

引證標本

Nantou County: Jenai Hsiang, Wushe-Yushih, near Jenai Junior High School, alt. 1,400 m, 18 Sep 2001, C. M. Wang & C. Y. Li 5270 (HAST, TNM), 5 Oct 2001, C. M. Wang & C. Y. Li 5284 (TNM); Jenai Hsiang, Lihsing Industrial Road, alt. 1,315 m, 21 Jan 2003, C. M. Wang & Y. M. Hsu 6545 (TNM).

參考文獻

• Tsai-Wen Hsu, Ching-I Peng and Chiu-Mei Wang, Taiwania 51(1): 41-45. 2006.