生活型

herb

形態特徵

• Perennial rhizomatous pubescent herbs, upright or spreading, 15-45 cm tall. Roots fibrous.
• Leaves dimorphic, sparsely pubescent on adaxial surface, pubescent or sparsely pubescent on abaxial surface. Radical leaves simple, 3-lobed to 3-partite, 17-53 mm long, 18-70 mm wide; orbicular or ovate; apex acute; base rounded, truncate or cordate; margin coarsely serrate; petioles 4.4-33.5 cm long. Cauline leaves 3-partite, segments narrowly oblong or narrowly elliptic; apex acute; base rounded or obtuse; margin entire or sometimes coarsely serrate; sessile or subsessile.
• Inflorescence a terminal cyme; pedicels 2-8 cm long, pubescent. Flowers 8-20 mm in diam., yellow; sepals 5, 3.8-5 mm long, 1.5-2.5 mm wide, spreading, ovate or elliptic, pubescent outside, glabrous inside; petals 5 or sometimes more, 8-13 mm long, 5-9 mm wide, obovate or narrowly obovate, glabrous on both sides; stamens numerous, 2.5-4.5 mm long, anthers oblong, 1-1.5 mm long, filaments linear; carpels many, glabrous; receptacles glabrous.
• Fruiting head ellipsoid to globose; achenes 1.5-4 mm long, elliptsoid-orbicular to obovoid-orbicular, glabrous, convex in lateral view; styles persistent, indistinct.

物候

Flowering March to May; fruiting April to June.

分布

• 台灣 : limited distribution in open places and forest margins below 800 m in the northern part.
• 世界 : Mainland China (except Xizang), Japan, Ryukyus, Korea and Russia.

引證標本

TAIPEI: Shimen: Yang, Chang & Sung 6250. KEELUNG: Paimiweng Fort, Wang & Chen 963.

參考文獻

• YANG, T. Y. ALECK and HUANG, TSENG-CHIENG. 1996. Flora of Taiwan, second edition 2: 553. (Fl. Taiwan 2nd edit.)