Fennel (Foeniculum vulgare) is a flowering plant species in the carrot family.It is a hardy, perennial herb with yellow flowers and feathery leaves. It is indigenous to the shores of the Mediterranean but has become widely naturalized in many parts of the world, especially on dry soils near the sea-coast and on riverbanks.

Fennel, Foeniculum vulgare, is a perennial herb. It is erect, glaucous green, and grows to heights of up to 2.5m, with hollow stems. The leaves grow up to 40cm long; they are finely dissected, with the ultimate segments filiform (threadlike), about 0.5mm wide. (Its leaves are similar to those of dill, but thinner.) The flowers are produced in terminal compound umbels 5–15cm wide, each umbel section having 20–50 tiny yellow flowers on short pedicels. The fruit is a dry seed from 4–10mm long, half as wide or less, and grooved.