Virginia pepperweed
Lepidium virginicum L. [Brassicaceae]
Mamegunbainazuna (マメグンバイナズナ, 豆軍配薺)
Life form: annual/biennial forb
Distribution: native to North America (exotic to Japan, reported in Meiji Era)
Habitat: disturbed sites, such as roadsides, waste places, etc.
Chromosome number: 2n = 32
Lepidium virginicum in Japan
[Left/Center] at an abondoned garden at N25/E2, Sapporo, on November 5 2011. [Right] at a playground close to JR Shin-Osaka Station on October 29 2011.