Collard greens have so much more flavor and actually ... a similarly textured variety with red or purple stems known as Russian or red kale; and a flatter, darker blueish-green variety known ...

For generations, collard greens have formed an important part of African and African-diaspora diets around the world.

Mustard greens, meanwhile, have wider leaves with jagged edges and a distinct wrinkly texture, and they tend to be far more delicate than collards (and sometimes they're a little bit purple).