celery
Plant
Biennial, grown as annual crop
Upright, up to 18" tall
Leaf
Size variable
Finely divided leaflets
Coarsely lobed and toothed edges
Long, upright petioles (stalks)
Edible leaflets and stalks
Petiole - Stalk
Grown primarily for edible petioles (stalks)
Ridged and grooved