Southern or American Mustard

Also curled mustard, Southern curled mustard

This familiar leaf belongs to the Brassica juncea subgroup Crispifolia, meaning curled leaf, another colloquial name. American (although not originally) mustard is by far the most common type sold in the United States, above all in the South, where it may simply be known as “greens.” Like most mustard greens developed in the United States, Southern Giant Curled mustard and the several similar cultivars that are the major market varieties have fairly large, frilly, parrot green leaves that are quite soft and thin, with a slight fuzziness. The flavor is radishy, herbal, and distinctly sharp and hot, but less so than that of some Asian types.