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''Rapistrum'', the bastardcabbages, is a genus belonging to the Brassicaceae family with a distinctive cross like arrangement of its petals. Species of ''Rapistrum'' are annual to perennials (Lifespan from 1 to 2 or more years). The yellow petals are accompanied by sepals that stand vertically at near right angles (erecto-patent). Leaf shape and arrangement varies from rough toothed (dentate) to a configuration of opposingly lobed pairs along the plant stalk, pinnately lobed. ==Fruit== The ''Rapistrum'' genus has a characteristic fruit comprising 2 segments. a) The distal (upper division) The part of the fruit farthest away from the point of attachment. The distal is endowed with a ribbed spheroid base (globose) that tapers to form a narrowed projection. It holds a single seed. b) The proximal (lower division) The part of the fruit nearest to the point of attachment. Possesses a more uniform narrower shape compared to the distal above, giving the fruit a waist. It holds a maximum of three seeds, more commonly none or one. The fruit varies from species to species. The distal of ''R. rugosum'' is strongly ribbed and narrows to form a beak whereas ''R. perenne'' is comparatively less wrinkled and ends with a style that stubbornly resists detachment, 'a persistent style'. When ripe the distal breaks away in an across-wise fashion, breaking transversely. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Rapistrum」の詳細全文を読む スポンサード リンク
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