Leaves are long and feathery, split at the edges, with divisions on the divisions, and smooth stalks.

Celery

Leaves like this, one leaf divided into several, with serrated edges.

The stem is like this, with concave channels on one side, and from head to tail, 10-20 centimeters have a node full of fine lines.

Cilantro

Leaves are the same as celery, only several times smaller, stems diverge from the root, the root is only a little bit, the root mustache is longer, and there are some stripes on the top of the stems, with a concave channel on one side.