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
HMCS Fennel May 1941. Joining Newfoundland Command in June, "Fennel" was assigned to escort group 22N until September 1941 and then group N11 from December 1941 until March 1942 as an ocean escort. Beginning in April 1942 she had a brief spell as a member of Mid-Ocean Escort Force (MOEF) escort group C-1 before transferring to the Western Local Escort Force (WLEF) in June of that year. She remained a part of WLEF until June 1943. In June 1943, "Fennel" joined MOEF group C-2 for one escort assignment before heading off for a refit. Upon completion of workups, she returned to C-2.