Fennel is used as a food plant by the larvae of some Lepidoptera species including in its native range the mouse moth and the Old-World swallowtail. Where it has been introduced in North America it may be used by the anise swallowtail. The word "fennel" developed from the Middle English "fenel" or "fenyl". This came from the Old English "fenol" or "finol", which in turn came from the Latin "feniculum" or "foeniculum", the diminutive of "fenum" or "faenum", meaning "hay". The Latin word for the plant was "ferula", which is now used as the genus name of a related plant. The
Fennel ("Ferula communis") is a large, coarse plant, with a pungent aroma, which grows wild in the Mediterranean region and is only occasionally grown in gardens elsewhere. Other species of the genus "Ferula" are also commonly called giant fennel, but they are not culinary herbs. In North America, fennel may be found growing in the same habitat and alongside natives osha ("Ligusticum porteri") and "Lomatium" species, useful medicinal relatives in the parsley family. Most "Lomatium" species have yellow flowers like fennel, but some are white flowered and resemble poison hemlock. "Lomatium" is an important historical food plant of Native Americans known