Fennel similar spices – anise, star anise, and coriander. In 2014, India produced 60% of the world total of fennel, with China and Bulgaria as leading secondary producers (table). Many species in the family Apiaceae or Umbelliferae are superficially similar to fennel, and some, such as poison hemlock, are toxic, so it is unwise, and potentially extremely dangerous, to use any part of any of these plants as an herb or vegetable unless it can be positively identified as being edible. Dill, coriander, and caraway are similar-looking herbs, but shorter-growing than fennel, reaching only . Dill has thread-like, feathery leaves and
Fennel of Life" repeatedly refers to the plant and mentions its purported ability to strengthen eyesight: Fennel, "Foeniculum vulgare", is a perennial herb. It is erect, glaucous green, and grows to heights of up to , with hollow stems. The leaves grow up to long; they are finely dissected, with the ultimate segments filiform (threadlike), about wide. (Its leaves are similar to those of dill, but thinner.) The flowers are produced in terminal compound umbels wide, each umbel section having 20–50 tiny yellow flowers on short pedicels. The fruit is a dry seed from long, half as wide or less, and