生活型

herb

形態特徵

• Monoecious perennial herbs; stems repent or ascending, densely hirsute, hirtellous or puberulent on nascent parts, glabrescent toward base, deep brownish-green, usually reddish brown on lower part.
• Leaves 2-ranked, chartaceous or membranaceous, sparsely hirsute above, sparsely to densely hirsute beneath, green to deep green above, pale green beneath, ovate to lanceolate, 2-14 cm long, 0.8-4 cm wide, apex obtuse to long caudate, entire, margins slightly ciliolate, serrate, basiscopic half semicordate; petioles 0-7 mm long, densely hirsute to glabrous beneath; stipules persistent, slightly hirtellous, lanceolate, ca. 2.3 mm long.
• Male inflorescences cymose glomerules; bracts free, lanceolate; peduncles to 3 cm long, densely puberulent. Female inflorescences sessile or subsessile; bracts 2, connate at base, glabrous, narrowly oblong or lanceolate, ca. 1.5 mm long, 0.3 mm wide. Male flowers widely depressed-obovoid; sepals 5, fimbriate ciliate on upper part, obovate-cymbiform, appendages ca. 2 mm long. Female flowers sessile or subsessile, subtended by bracteoles; sepals 3-5, unequal, margins glandular, cymbiform, appendages hornlike, ca. 2-3 mm long.
• Achenes ellipsoid, distinctly tuberculate.

分布

• 台灣 : at low to medium altitudes, moist forest floors and ravines.
• 世界 : Japan, Ryukyu, Korea, S. mainland China and Vietnam.

引證標本

TAIPEI: Peichatienshan, Shih 3402. ILAN: Fushan, Shih 2820; Shenmihu, Shih 2866. TAOYUAN: Rarashan, Chen s. n. 1994. HSINCHU: Wutzushan, Kawakami & Mori 5112. TAICHUNG: Hsinchiayan, Shih 3004. NANTOU: Chitou, Hayata s. n. 1916. CHIAYI: Alishan, Hayata s. n. 1912. PINGTUNG: Tawushan, Matuda 720. TAITUNG: Chihpentsushan, Shih 2678; Hsiaokueihu, Shih 2687. HUALIEN: Yenkai Logging Trail, Chiou s. n. 1983.

參考文獻

• YANG, YUEN-PO, SHIH, BING-LING and LIU, HO-YIH, Flora of Taiwan, second edition 2: 231. 1996.  (Fl. Taiwan 2nd edit.)