Two vessels of the Royal Navy have been named HMS Genista, after the flower:
HMS Genista was an Arabis-class minesweeping sloop built by Napier & Miller and launched on 26 February 1916. Sunk by German submarine U-57 in the Atlantic on 23 October 1916..HMS Genista was a Flower-class corvette launched at Harland & Wolff on 24 July 1941. It was transferred to the Air Ministry in 1947 and renamed Weather Recorder, and broken up in Antwerp in October 1961.