The two most popular types of parsley are Italian (flat-leaf) and curly. Hamburg and Japanese are two other types of parsley that are lesser known and utilized. While Italian parsley and curly leaf parsley have a lot in common, they have their own unique flavors and appearance. Italian parsley has broad, flat leaves that range from dark to light green. Italian parsley has a more robust flavor whereas curly leaf parsley has a more natural, grassy taste. Curly leaf parsley, as you might have guessed, has thick, curly leaves. Curly leaf is better as a garnish generally while italian parsley is great for cooking.