Brassica rapa Family : Cruciferae Genus: Brassica Synonyms: Brassica parachinensis – L.H.Bailey. Known Hazards : None known Common Names :bok choy, pak choi, choi sum, Chinese white cabbage, Chinese flowering cabbage, Peking cabbage, celery cabbage, and white mustard cabbage. Nomenclature In Mandarin Chinese bai cai ( “white vegetable”) refers to both