生活型

herb

形態特徵

• Herbs, perennial, 30–50 cm tall, glabrous or sparsely pubescent.
• Rosette leaves soon withered, similar to cauline leaves. Cauline leaves deeply pinnatifid; petiole not auriculate; leaf blade 3.5–15 × 1–4.5 cm; lateral lobes 3–6 on each side of midvein, sublinear, lanceolate, oblong, elliptic, or ovate, margin dentate or serrate, sometimes subentire; uppermost leaves with 1–3 lateral lobes or not lobed, often subsessile.
• Fruiting pedicels 8–12 mm, slender, divaricate. Sepals green or yellow, oblong, 1.8–3(–3.5) × 0.7–1.5 mm, ascending or spreading. Petals yellow, spatulate, 2–5 × 1–2 mm, apex rounded.
• Fruits linear, 0.5–1cm.

物候

Flowering and fruiting from May to September. 2n = 48.

分布

• 台灣 : in wet places and at edges of vegetable fields.
• 世界 : China (Xinjiang, Liaoning), India, Japan, Kashmir, Russia, Tajikistan, Uzbekistan; SW Asia, Europe; introduced in North and South America.

引證標本

TAICHUNG.: Wuling, T. H. Hsieh 3001.

參考文獻

• Tsung-Hsin Hsieh. 2005. Taiwania 50(4): 297-301.