生活型

herb

形態特徵

• Erect biennial herb; stems branched, 30–80 cm tall, minutely puberulent.
• Leaves rather long-hairy below; median leaves obovate-oblanceolate, 1.5–5 cm long, 2–10 mm wide, acute, narrowed at base, deeply serrate, neither lobed nor deeply divided; upper leaves with a few teeth or subentire.
• Flowers in racemes, many, greenish white; sepals 4, green, ovate, obtuse; petals white, oblanceolate; stamens 2, inner ones wanting.
• Silicles orbicular, with a narrow wing on upper margin; seeds narrowly winged on upper margin.

分布

• 台灣 : Naturalized in Taiwan, in lowlands and coastal regions of the northern part of the island.
• 世界 : North America.

引證標本

TAIPEI: Peihsinchuang, Ying 1063; Shihmen, Ying 1072*.

參考文獻

• YING, SHAO-SHUN, Flora of Taiwan, second edition 2: 761. 1996.  (Fl. Taiwan 2nd edit.)