Barbarea derchiensis S. S. Ying; Brassica campestris Linnaeus subsp. rapa (Linnaeus) J. D. Hooker; B. campestris subsp. rapifera (Metzger) Sinskaya; B. campestris var. rapa (Linnaeus) Hartman; B. rapa subsp. rapifera Metzger; Raphanus rapa (Linnaeus) Crantz.

Plants biennial. Taproot fleshy, napiform. Basal leaves rarely up to 10, not rosulate or obscurely rosulate; petiole slender, neither fleshy nor winged; leaf blade lyrately pinnatifid or rarely sinuate-dentate. Fl. Mar-May, fr. May-Jul. 2n = 20*.

Cultivated for its fleshy roots. Throughout China [widely cultivated elsewhere].