Flower-class sloop

For other naval ship classes of the same name, see Flower class.

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".

Fleet minesweepers

The "Flowers" were designed to be built at merchant shipyards, to ease the pressure on yards specializing in warships. The initial three groups were the first purpose-built fleet minesweepers, built with triple hulls at the bow to give extra protection against loss from mine damage when working. When submarine attacks on British merchant ships became a serious menace after 1916, the existing Flower-class minesweepers were transferred to convoy escort duty, and fitted with depth charges, as well as 4.7-inch naval guns.

Acacia-class sloop: first group to be built, in 1915. 24 vessels built in two batches of 12. Two sunk during the war.
Azalea-class sloop: 12 vessels built in 1915. Slightly modified Acacia's; two sunk during the war.
Arabis-class sloop: 36 vessels built 1915, a further eight for French Navy. Five British, and one French vessel sunk.

Submarine decoys ("warship-Qs")

The latter two groups, the Aubretias and Anchusas, were designed as submarine decoys, or Q-ships, with hidden guns and a distinctive "merchant marine" appearance. These "warship-Qs" were thus the first purpose-built anti-submarine fighting ships, and their successor types were the anti-submarine sloops of the second world war, which evolved into the modern anti-submarine warfare frigate during the 1939-45 Battle of the Atlantic.

Aubretia-class sloop: 12 vessels built 1916; two sunk.
Anchusa-class sloop: 28 vessels built 1917. Saw service as Q ships; six sunk.

Service

Some 112 "Flowers" in total were built for the Royal Navy, and a further eight for the French Marine Militaire. Of these, 17 British and one French "Flowers" were sunk.

Some members of the class served as patrol vessels throughout the world during the peacetime years between the wars, but almost all were disposed of by the Second World War. This allowed the majority of the class names to be revived for the new, smaller Flower-class corvettes.

Survivors

Two members of the final Anchusa group, Chrysanthemum and Saxifrage (renamed President in 1922), survived to be moored on the River Thames for use as drill ships by the RNVR until 1988, a total of seventy years in Royal Navy service. Chrysanthemum was sold to private owners and scrapped in 1995. HMS President was sold and preserved, and is now one of the last three surviving warships of the Royal Navy built during the First World War, (along with the 1914 light cruiser HMS Caroline in Belfast, and the 1915 monitor HMS M33 in Portsmouth dockyard).

External links

Media related to Flower class sloop at Wikimedia Commons

"Flower" classes of sloop

Anchusa class Arabis class Azalea class Acacia class Aubretia class

Preceded by: Cadmus class Followed by: P class List of corvette and sloop classes of the Royal Navy

British naval ship classes of the First World War

Aircraft/Seaplane carriers	Empress^S^V Riviera^S^V Engadine^S^V Ark Royal^S Ben-my-Chree^S^V Campania^S^V Raven II^S^V Anne^S^V Vindex^S^V Manxman^S^V Furious^M Pegasus^S^V Nairana^S^V Argus^S^V Vindictive^S^V

Dreadnought battleships	Dreadnought^S Bellerophon St Vincent Neptune^S Colossus Orion King George V Erin^S Agincourt^S Iron Duke Canada^S Queen Elizabeth Revenge

Pre-dreadnought battleships	Royal Sovereign Majestic Canopus Formidable Duncan King Edward VII Swiftsure Lord Nelson

Battlecruisers	Invincible Indefatigable Lion Queen Mary^S Tiger^S Renown Courageous Admiral^S^C Incomparable^X

Armoured cruisers	Cressy Drake Monmouth Devonshire Duke of Edinburgh Warrior Minotaur

Heavy cruisers	Hawkins

Light cruisers	Town^G Arethusa C^{G, C} Danae^C Emerald^A

Protected cruisers	Apollo Astraea Eclipse Blake Pearl Edgar Powerful Diadem Arrogant Pelorus Highflyer Challenger Topaze

Scout cruisers	Adventure Forward Pathfinder Sentinel Boadicea Blonde Active

Destroyer flotilla leaders	Swift^S Faulknor Marksman Parker Admiralty (or Scott)^C Thornycroft (or Shakespeare)^C

Destroyers	A^G B^G C^G D^G E^G F Cricket^G G H I K L Admiralty M Hawthorn M Thornycroft M Yarrow M Yarrow Later M R^G S^{G, C} Talisman V and W^{G, C}

Monitors	Marshal Ney Abercrombie Lord Clive Humber Gorgon M15 M29 Erebus

Minesweepers	Flower Racecourse Hunt 24^C

Gunboats	Fly Insect

Submarines	A B C D E F G H^C J K L^C M^C R^C Swordfish^S V

A All completed after the war C One or more completed after the war G Grouping of several classes M converted from Courageous class S Single ship of class V Conversions X Cancelled

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