Here is a weird one.
Again, it looks similar to choy sum, but goes by the name of 菜花 (Mand: cài huā; Cant: coi3 faa1), literally meaning 'vegetable flowers'. Unfortunately, exactly the same name is used for cauliflower and two sexually transmitted diseases. Do not search for Google pictures of this vegetable; you will only get cauliflowers and STDs).
To continue the sexual connection this is the leaves and flowers of rape. Nothing to do with sexual violence. Rape is the source of rapeseed oil aka Canola. The name is derived from the Latin 'rapus' meaning 'turnip', a closely related plant.
It also comes in a red stemmed variety. 红菜花/紅菜花 (Mand: hóng cài huā; Cant: hung4 coi3 faa1).
