the.com/italian parsley

means A flat-leaf variety of parsley prized for its stronger, more peppery flavor, used as a cooking herb rather than just a decorative garnish.

from Flat-leaf parsley is the older, more common form of the plant across the Mediterranean, but English cooks got hooked on the ruffled 'curly' mutation for garnishing plates, so the plainer, tastier original needed a name to distinguish itself — and since it was strongly associated with Italian cooking (where it's simply called 'prezzemolo' and used constantly), it picked up the label 'Italian parsley' to set it apart from its decorative rival. The word 'parsley' itself traces back through Old French to Greek 'petroselinon' — literally 'rock celery,' from petra (rock) and selinon (celery), describing where the wild plant liked to grow.