Este Plant/Variety não existe na sua língua, Ver em: English (en),
Ou usar o Google Translate:  

Mustard greens are a cruciferous crop (cabbage family)  grown for the leafy greens that have a slightly bitter, peppery or mustardy taste. Mustard’s dark green color makes it a very nutritious leafy vegetable that can be grown year round in many parts of the world.

Mildly spicy variety originating in Japan.