Mustard (English spelling) leaf mustard

Japanese: カラシナ(芥子菜∥芥菜) - カラシナ（英語表記）leaf mustard

A cultivated biennial plant of the Brassicaceae family. The stems and leaves that shoot up in early spring are pickled and eaten, and the seeds are used to make mustard oil and mustard. It has already been recorded in Japan in the "Honsho Wamei," indicating that it was introduced there a long time ago. The plant is upright with few leaves, and the young leaves, stems, and undersides of the leaves have bristles. The leaves are oblong or oval with notches on the edges. The leaves are greenish brown in color, and the flowers are small and bright yellow. It is adaptable to a wide range of soils, preferring suitably wet areas, making it suitable for cultivation as a second crop in paddy fields.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

栽培されるアブラナ科の越年草。春先にとう立ちした茎葉を漬物にして食べ，また種子をからし油やマスタードの原料とする。日本では《本草和名》にすでに記載され，古くに導入されていることがわかる。草姿は立性で葉数は少なく，若い葉や茎および葉の裏側などに剛毛を生じる。葉は長楕円形または卵形で，葉縁に切れ込みがある。葉色は緑褐色で花は小さく鮮黄色を呈する。土壌の適応性は広く，適湿地を好むので水田裏作での栽培に適する。

出典　株式会社平凡社世界大百科事典第２版について　情報

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