Found in grassy places, on coastal locations and roadsides, Fennel was most probably introduced into Ireland from the shores of the Mediterranean. It's a strongly aromatic, pale grey-green, perennial which grows to a height of 2m on dry ground. It bears its bright yellow flowers (2-3mm across) in wide terminal umbels which have 20 spokes or rays but no bracts and they bloom from June to October. The foliage is grey, sometimes bronzy, and is pinnately divided into long, feathery threads. The plant stem is stiff and smooth, solid at first but becoming hollow. Fennel belongs to the family Apiaceae
My earliest record of Fennel is beside Killiney Beach, Co Dublin in 1973 and I photographed it on Dún Laoghaire Pier, Co Dublin in 2005.
If you are satisfied you have correctly identified this plant, please submit your sighting to the National Biodiversity Data Centre