生活型

herb

形態特徵

• Sparsely pubescent or subglabrous perennial herbs. Roots fibrous, sometimes with adventitious root. Stems ascending or erect, 26-40 cm, branched, base part sometimes purplish, rooting at lower nodes.
• Radical leaves with petiole 10-18 cm; blade ternate, 4.5-5.3 cm long, 6.4-7.6 cm wide, papery, margin serrulate, sparsely pubescent on both surfaces; central leaflet broadly rhombic or broadly ovate, 3-lobed, 3.4-4 cm long, 2.7-3.9 cm, apex acute, base cordate, petiolule 7-16 mm; lateral leaflets petiolulate, obliquely broadly ovate, unequally 2-lobed or 2-partite. Cauline leaves similar to basal ones, with shorter petioles.
• Inflorescence compound monochasium, terminal. Pedicels 1-5.9 cm long. Flowers 10-12 mm in diam. Receptacle hirtellous. Sepals 5, reflexed, narrowly obovate, 3-4 mm long 1.5-2 mm wide; abaxially strigose. Petals 5-7, yellow, narrowly obovate or long elliptic, 4.5-5 mm long, 2-2.8 mm wide; nectary pit covered by a scale, apex round. Stamens numerous; anthers oblong.
• Carpels numerous, glabrous. Aggregate fruit subglobose, 8-9 mm in diam. Achenes laterally compressed, obliquely obovate, 3.5-4 mm long, 2 mm wide, narrowly marginate; persistent stigma triangular, ca. 1.2 mm, abaxially hooked at apex.
• Chromosome number n = 8.

物候

Flowering February to May; Fruiting March to July (-September).

分布

• 台灣 : distributed in semi-wet places and forest margins between 1,500-2,200 m in north part, often coexisted with <i>R. cantoniensis</i> and <i>R. sieboldii</i> in some area
• 世界 : southern China and Japan.

引證標本

Taipei City: Yangmingshan National Park, Chingtienkang, 700-800 m, S. M. Kuo 420 (TNU); Palaka, 400-600 m, H. L. Chiang 1877 (TAIF). Taoyuan: Fuhsing, S. H. Lin 755 (TAI); Lofu to Paling, 300-600 m, J. C. Wang 10779 (TNU); Mt. Takuanshan Forest Recreation Area, 1600-1700 m, S. M. Kuo 230 (TNU); Shangpalin, Lalashan, 1400-2100 m, T. Y. A. Yang 6286 (TNM). Hsinchu: Wufeng, Kuanwu, 2000-2100 m, S. M. Kuo 633 (TNU); same loc., T. W. Hsu 8578 (TESRI). Nantou: Luku, Hsitou, 1200-1300 m, S. M. Kuo 223 (TNU); same loc., Y. S. Tseng 653 (TESRI); Hsitou to Shenmu, T. Y. A. Yang 153 (TAI). Yunlin: Kukeng, 1380 m, C. H. Chen 1519 (TESRI). Chiayi: Alishan, 2400 m, M. Tamura 22225 (TAI); Alishan to Hoshe, 1500 m, Aug. 20, 1963, M. Tamura s. n. (TAI); Sisters’ Pond, 2200-2500 m, T. Y. A. Yang et al. 5315 (TNM); Mt. Tatashan, 2300-2500 m, S. M. Kuo 123 (TNU); Meishan, 900 m, C. H. Chen 2882 (TESRI). Ilan: Tatung, Mingchiu to Paling, 1100-1200 m, H. T. Hung 104 (TNU).

參考文獻

• Shu-Miao Kuo, Tsung-Yu Aleck Yang and Jenn-Che Wang, Taiwania 50(3): 209-221. 2005.