Parsley (Petroselinum hortense) is a species of Petroselinum in the family Apiaceae, native to the central Mediterranean region (southern Italy, Algeria and Tunisia), naturalized elsewhere in Europe, and widely cultivated as an herb, a spice and a vegetable.
Where it grows as a biennial, in the first year, it forms a rosette of tripinnate leaves 10–25 cm long with numerous 1–3 cm leaflets, and a taproot used as a food store over the winter. In the second year, it grows a flowering stem to 75 cm tall with sparser leaves and flat-topped 3–10 cm diameter umbels with numerous 2 mm diameter yellow to yellowish-green flowers. The seeds are ovoid, 2–3mm long, with prominent style remnants at the apex. One of the compounds of the essential oil is apiol. The plant normally dies after seed maturation.