The C class was a group of twenty-eight light cruisers of the Royal Navy, and were built in a sequence of seven groups known as the Caroline class, the Calliope class, the Cambrian class, the Centaur class, the Caledon class, the Ceres class and the Carlisle class. They were built for the rough conditions of the North Sea, and proved to be rugged and capable vessels, despite being somewhat small and cramped.
The V and W class was an amalgam of six similar classes of destroyer built for the Royal Navy under the 9th, 10th, 13th and 14th of fourteen War Emergency Programmes during the First World War and generally treated as one class. For their time they were among the most powerful and advanced ships of their type in the world, and set the trend for future British designs.
The Hunt-class minesweeper was a class of minesweeping sloop built between 1916 and 1919 for the Royal Navy. They were built in two discrete groups, the earlier Belvoir group designed by the Ailsa Shipbuilding Company and the subsequent Aberdare group designed by the Admiralty. They were classed as Fleet Minesweeping Sloops, that is ships intended to clear open water. The Belvoir group were named after British fox hunts. Those of the Aberdare group were originally named after coastal towns, watering places and fishing ports, some of which happened to be hunts by coincidence. However, all were soon renamed after inland locations to prevent confusion caused by the misunderstanding of signals and orders.
HMS President is a retired Flower-class Q-ship that was launched in 1918. She was renamed HMS President in 1922 and moored permanently on the Thames as a Royal Navy Reserve drill ship. In 1982 she was sold to private owners and, having changed hands twice, served as a venue for conferences and functions as well as the offices for a number of media companies. She has been moved to Chatham on the Medway in Kent since 2016, but is due to return to the capital. She had the suffix "(1918)" added to her name in order to distinguish her from HMS President, the Royal Naval Reserve base in St Katharine Docks. She is one of the last three surviving Royal Navy warships of the First World War. She is also the sole representative of the first type of purpose built anti-submarine vessels, and is the ancestor of World War II convoy escort sloops, which evolved into modern anti-submarine frigates.
The Flower class comprised five sub-classes of sloops built under the Emergency War Programme for the Royal Navy during World War I, all of which were named after various flowers. They were popularly known as the "herbaceous borders", in humorous reference to a well-known adage about the Royal Navy, as well as to a type of garden arrangement popular in the United Kingdom.
The Arabis class was the third, and largest, of the five sub-classes of minesweeping sloops completed under the Emergency War Programme for the Royal Navy in World War I. They were part of the larger "Flower class" shipbuilding project, which were also referred to as the "Cabbage class", or "Herbaceous Borders". The ships were also used outside their minesweeping duties as patrol vessels, tugs, and personnel and cargo transports.
The Aubrietia-class sloops were a class of twelve sloops built under the Emergency War Programme for the Royal Navy in World War I as part of the larger Flower class. They were also referred to as the "cabbage class", or "herbaceous borders". The Flowers were the first ships designed as minesweepers.
The Acacia class was a class of twenty-four sloops that were ordered in January 1915 under the Emergency War Programme for the Royal Navy in World War I as part of the larger Flower class which were also referred to as the "Cabbage class", or "Herbaceous Borders". They were ordered in two batches, twelve ships on 1 January and another twelve on 12 January, and all were launched within about four or five months, and delivered between May and September 1915. They were used almost entirely for minesweeping until 1917, when they were transferred to escort duty.
HMS Bergamot was an Anchusa-class sloop of the Royal Navy, which had a short career during World War I. Built by Armstrong Whitworth, the ship was laid down on 1 January 1917, launched on 5 May, and commissioned on 14 July.
HMS Chrysanthemum was an Anchusa-class sloop of the Royal Navy, launched on 10 November 1917. She received a Le Cheminant chronometer from the Royal Observatory on 15 May 1925. After service in the Mediterranean, in 1938 she became a drill ship with Royal Naval Volunteer Reserve (RNVR) and then the Royal Naval Reserve (RNR). She was sold in 1988 to private owners and subsequently scrapped in 1995.
Several ships of the British Royal Navy have been named HMS Partridge, after the bird.
Two Royal Navy ships have been named HMS Anchusa after the flower:
HMS Bryony was an Anchusa-class sloop of the Royal Navy, built at the yards of Armstrong Whitworth and launched on 27 October 1917.
The 24 class was a class of minesweeping sloops. They were derived from the preceding Flower-class sloop, but designed to appear double-ended. Twenty-four ships to this design were ordered between December 1916 and April 1917 under the Emergency War Programme for the Royal Navy in World War I, although two of them were cancelled before launch. All were named after famous racehorses, but they were not named Racehorse class as the Admiralty realised that this could easily be confused in communications with the Racecourse class of paddle minesweepers, and they officially became the 24 class.
HMS Snowdrop was an Azalea-class sloop of the Royal Navy. She served during the First World War. Snowdrop survived the war and was sold for scrap in 1923.
Two ships of the Royal Navy have borne the name HMS Buttercup, named for the buttercup flower:
HMS Coreopsis was an Anchusa-class sloop and Q-ship of the Royal Navy, built at the yards of Barclay Curle on Clydeside and launched on 15 September 1917. Employed as a decoy ship with concealed armament, she served with the Grand Fleet or in the Mediterranean operating from Gibraltar under the false names Beardsley and Bigott. After the end of the First World War, she was laid up before being sold for breaking on 6 September 1922, but did not arrive at Thos. W. Ward's yard in Preston, Lancashire until 5 May 1924.
Two ships of the Royal Navy have borne the name HMS Rhododendron, after the flower:
HMS Cornflower was an Arabis-class sloop of the Royal Navy and from 1933 the Hong Kong Naval Volunteer Force (HKNVR).
Royal Navy 
