USU Student Organic Farm
Mustard greens are the leaves of the mustard plant. The leaves look similar to kale, but are more delicately flavored, with a slight hint of mustard (of course). Mustard greens have large, bright green leaves that are frilled or scalloped around the edge and have a slightly fuzzy surface. Some varieties of mustard greens have a stronger flavor than others. Chinese mustard greens, which are used in many Asian dishes, have a strongly bitter taste.
Inman, Elisabeth, "Mustard Greens" (2011). USU Student Organic Farm Newsletter. Paper 3.