Flowering Chinese Cabbage (Brassica rapa var amplexicaulis)
 
Also known as:
edible rape, flowering Chinese cabbage, flowering pak choy, flowering rape, flowering white cabbage, mock pak choy

Shuka, Hybrid - Autumn Torch #165

Asian vegetable names...

China:  nai yow choy, cai hua, pu tung bai cai, you cai, cai xin, tsai hsin, yintsai sum, yu choy, yu choy sum, yui tsai

Japan:  aburana, hanana, nabana, nanohana, natane, saishin