生活型

herb

形態特徵

• Rhizomatous herbs. Stem bracteate. Staminate plants (10-)20–40(–60) cm tall, bracts oblong, 3–8 cm long. Pistillate plants 40–60(–70) cm tall, bracts linear to lanceolate, 3–5 cm long.
• Leaves mainly radical, reniform, margins denticulate, (5-)8–13×8–15 cm, petiole 7–20(–26) cm long, base dilated.
• Heads calyculate at base, in broad panicles, flowering stems and peduncles glandular hairy and sericeous. Involucral bracts green tinged purple, campanulate, ca. 8×1 mm. Staminate florets bisexual, pistillate florets sterile, corolla tube very narrow, ca. 4 mm long; limb much broader than tube, campanulate, ca. 4×2–3 mm long, lobes ca. 0.6 mm; ovary rudimentary, ca. 0.8–1.1×0.15–0.3 mm, style ca. 9.5 mm long; anthers ca. 1.8 mm long, apex appendage triangular, base obtuse; filaments ca. 1.6 mm long; pappus white, ca. 4.5 mm long. Pistillate plants 40–60(–70) cm tall, bracts linear to lanceolate, 3–5 cm long. Leaves radical, as in staminate plants. Heads all pistillate, calyculate at base, in panicles, peduncle and flowering stems glandular hairy and sericeous; peduncle 2–6 cm long. Involucral bracts 9–10×1–1.7 mm, recurved apically. Corolla creamy, filiform, ca. 10 mm long.
• Achenes brown, cylindric, ca. 2.5×0.5 mm, minutely papillate. Pappus white, ca. 11–12 mm long.
• Chromosome number, 2n = 60 (Peng & Hsu, 1978).

分布

• 台灣 : semishaded to exposed slope bases, road cuts in forest, and in open fields, usually in moist places, 1,500–2,500 m.

引證標本

HSINCHU: Yuanyanghu, Shen 627. TAICHUNG: Szuyuan Forest Road, Shen 442; Wuling Farm, Shen 417. NANTOU: Kuankao, Chen 940; Meifeng, Peng 15294. CHIAYI: Alishan, Peng 4623. KAOHSIUNG: Taoyuan, Wang 1126; Yakou logging road, Wang 1095. PINGTUNG: Wutai, Lin 418. TAITUNG: Hsiangyang, Yang 6454. HUALIEN: Juisui Forest Road, Wang 570.

參考文獻

• PENG, Ching-I & CHUNG, Kuo-Fang; LI, Hui-Lin, Flora of Taiwan, second edition 4: 1030. 1998.  (Fl. Taiwan 2nd edit.)