The American Flower-class corvettes were those ships of the Flower class built for, or operated by, the United States Navy

United States Navy

The United States Navy is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. The U.S. Navy is the largest in the world; its battle fleet tonnage is greater than that of the next 13 largest navies combined. The U.S...

 during World War II

World War II

World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

.

Construction history

In December 1941, after the US entry into World War II, the USN had a large building programme for anti-submarine warfare

Anti-submarine warfare

Anti-submarine warfare is a branch of naval warfare that uses surface warships, aircraft, or other submarines to find, track and deter, damage or destroy enemy submarines....

 ships, but none nearing completion. To overcome this shortfall, the Royal Navy

Royal Navy

The Royal Navy is the naval warfare service branch of the British Armed Forces. Founded in the 16th century, it is the oldest service branch and is known as the Senior Service...

 agreed to transfer a number of ASW ships to the USN, including ten Flower class corvette

Corvette

A corvette is a small, maneuverable, lightly armed warship, originally smaller than a frigate and larger than a coastal patrol craft or fast attack craft , although many recent designs resemble frigates in size and role...

s. These ships had already been in commission and had seen action during the Battle of the Atlantic.

These ships were classified as Patrol Gunboats, and numbered PG 62 to 71, and were referred to as the Temptress class, after the first ship to be re-commissioned.

The USN also placed orders for 15 more "Flowers" from Canadian shipyards. This was met by transferring a number of vessels under construction for the RN to USN. These ships were of the Modified Flower type, a design which consolidated the various modifications developed in the course of building the original "Flowers".

In the event the USN only took charge of 8 of these ships; the other 7 were transferred back to the RN under Lend-Lease

Lend-Lease

Lend-Lease was the program under which the United States of America supplied the United Kingdom, the Soviet Union, China, Free France, and other Allied nations with materiel between 1941 and 1945. It was signed into law on March 11, 1941, a year and a half after the outbreak of war in Europe in...

 arrangements.

The US ships were numbered PG 86 to 100 and were referred to as the Action class.

Temptress class

RN name	Pennant	Builder	Completed	Transferred	USN name	Pennant	Fate
HMS Veronica	K37	Smiths Dock Co. Smiths Dock Company Smiths Dock Company, Limited, often referred to simply as Smiths Dock, was a British shipbuilding company.-History:The company was originally established by Thomas Smith who bought William Rowe's shipyard at St. Peter's in Newcastle upon Tyne in 1810 and traded as William Smith & Co. The company... , South Bank-on-Tees South Bank, Middlesbrough South Bank is a small town which forms part of the Middlesbrough urban area that lies 2.3 miles from Middlesbrough centre, in North East England. As the name suggests, it lies on the south bank of the River Tees. Although it is part of the Middlesbrough conurbation, it is a ward of Redcar and...	18 Feb 1941	16 Feb 1942	USS Temptress	PG-62	Returned to RN 26 Aug 1945
HMS Heliotrope	K03	John Crown & Sons Ltd John Crown & Sons Ltd John Crown & Sons Ltd, was a British shipbuilding company founded in 1847 and based on the River Wear, Sunderland.-Ships built by John Crown & Sons Ltd:-See also:* List of shipbuilders and shipyards... , Sunderland City of Sunderland The City of Sunderland is a local government district of Tyne and Wear, in North East England, with the status of a city and metropolitan borough...	12 Sept 1940	24 Mar 42	USS Surprise USS Surprise (PG-63) USS Surprise , the fourth American naval ship of the name, was the British Flower-class corvette HMS Heliotrope loaned to and operated by the United States Navy from 1942-1945 as a Temptress-class patrol gunboat...	PG-63	Returned to RN 26 Aug 1945
HMS Hibiscus	K24	Harland & Wolff Ltd. Harland and Wolff Harland and Wolff Heavy Industries is a Northern Irish heavy industrial company, specialising in shipbuilding and offshore construction, located in Belfast, Northern Ireland.... , Belfast Belfast Belfast is the capital of and largest city in Northern Ireland. By population, it is the 14th biggest city in the United Kingdom and second biggest on the island of Ireland . It is the seat of the devolved government and legislative Northern Ireland Assembly...	21 May 1940	2 May 1942	USS Spry	PG-64	Returned to RN 26 Aug 1945
HMS Arabis HMS Arabis (K73) For the New Zealand corvette of the same name see HMNZS ArabisHMS Arabis was a of the Royal Navy. Originally ordered for the French Navy in the early days of the war, the ship was commissioned into the Royal Navy as HMS Arabis. She was transferred to the United States Navy in 1942, serving as USS...	K73	Harland & Wolff Ltd. Harland and Wolff Harland and Wolff Heavy Industries is a Northern Irish heavy industrial company, specialising in shipbuilding and offshore construction, located in Belfast, Northern Ireland.... , Belfast Belfast Belfast is the capital of and largest city in Northern Ireland. By population, it is the 14th biggest city in the United Kingdom and second biggest on the island of Ireland . It is the seat of the devolved government and legislative Northern Ireland Assembly...	5 Apr 1940	30 Apr 1942	USS Saucy	PG-65	Returned to RN 26 Aug 1945 and recommissioned as Snapdragon
HMS Periwinkle	K55	Harland & Wolff Ltd. Harland and Wolff Harland and Wolff Heavy Industries is a Northern Irish heavy industrial company, specialising in shipbuilding and offshore construction, located in Belfast, Northern Ireland.... , Belfast Belfast Belfast is the capital of and largest city in Northern Ireland. By population, it is the 14th biggest city in the United Kingdom and second biggest on the island of Ireland . It is the seat of the devolved government and legislative Northern Ireland Assembly...	8 Apr 1940	15 Mar 1942	USS Restless	PG-66	Returned to RN 26 Aug 1945
HMS Calendula	K28	Harland & Wolff Ltd. Harland and Wolff Harland and Wolff Heavy Industries is a Northern Irish heavy industrial company, specialising in shipbuilding and offshore construction, located in Belfast, Northern Ireland.... , Belfast Belfast Belfast is the capital of and largest city in Northern Ireland. By population, it is the 14th biggest city in the United Kingdom and second biggest on the island of Ireland . It is the seat of the devolved government and legislative Northern Ireland Assembly...	6 May 1940	12 Mar 1942	USS Ready	PG-67	Returned to RN 23 Aug 1945
HMS Begonia HMS Begonia (K66) HMS Begonia was a that served in the Royal Navy during World War II, until she was lent to the United States Navy and commissioned as USS Impulse.-Service history:...	K66	Cook, Welton & Gemmell Cook, Welton & Gemmell Cook, Welton and Gemmell was a shipbuilders based in Hull and Beverley, East Riding of Yorkshire. England.The firm was founded in 1883 on South Bridge Road, Hull, on the Humber bank. The founding partners were William James Cook, Charles Keen Welton and William Gemmell... , Beverley Beverley Beverley is a market town, civil parish and the county town of the East Riding of Yorkshire, England, located between the River Hull and the Westwood. The town is noted for Beverley Minster and architecturally-significant religious buildings along New Walk and other areas, as well as the Beverley...	8 Mar 1941	10 Mar 1942	USS Impulse	PG-68	Returned to RN 22 Aug 1945
HMS Larkspur	K82	Fleming & Ferguson Ltd. Ferguson Shipbuilders Ferguson Shipbuilders Limited is a shipyard located in Port Glasgow on the River Clyde in Scotland. It is the last remaining shipbuilder on the lower Clyde, and is currently the only builder of merchant ships on the river - the company's mainstay has long been Roll-on/roll-off ferries.-History:The... , Paisley Paisley Paisley is the largest town in the historic county of Renfrewshire in the west central Lowlands of Scotland and serves as the administrative centre for the Renfrewshire council area...	4 JAn 1941	17 Mar 1942	USS Fury	PG-69	Returned to RN 22 aug 1945
HMS Heartsease HMS Heartsease (K15) HMS Heartsease was a Flower-class corvette of the Royal Navy. She served with both the Royal Navy and the United States Navy during the Second World War, with the latter navy as USS Courage...	K15	Harland & Wolff Ltd. Harland and Wolff Harland and Wolff Heavy Industries is a Northern Irish heavy industrial company, specialising in shipbuilding and offshore construction, located in Belfast, Northern Ireland.... , Belfast Belfast Belfast is the capital of and largest city in Northern Ireland. By population, it is the 14th biggest city in the United Kingdom and second biggest on the island of Ireland . It is the seat of the devolved government and legislative Northern Ireland Assembly...	4 Jun 1940	3 Apr 1942	USS Courage	PG-70	Returned to RN 23 Aug 1945
HMS Candytuft	K09	Grangemouth Dry Dock Co., Grangemouth Grangemouth Grangemouth is a town and former burgh in the council area of Falkirk, Scotland. The town lies in the Forth Valley, on the banks of the Firth of Forth, east of Falkirk, west of Bo'ness and south-east of Stirling. Grangemouth had a resident population of 17,906 according to the 2001...	16 Oct 1940	4 Mar 1942	USS Tenacity	PG-71	Returned to RN 26 Aug 1945

Action class

RN name	Pennant	Builder	USN name	Pennant	Completed	To USN	Fate
HMS Comfrey	K277	Collingwood Shipyards Ltd., Collingwood Collingwood, Ontario Collingwood is a town in Simcoe County, Ontario, Canada. Geographically, it is situated on Nottawasaga Bay at the southern point of Georgian Bay.-History:...	USS Action USS Action (PG-86) USS Action was the lead ship of the Action-class patrol boats acquired by the United States Navy for the task of patrolling American coastal waters during World War II...	PG-86	22 Nov 1942	same day	Sold 6 Feb 1946
HMS Cornel	K278	Collingwood Shipyards Ltd., Collingwood Collingwood, Ontario Collingwood is a town in Simcoe County, Ontario, Canada. Geographically, it is situated on Nottawasaga Bay at the southern point of Georgian Bay.-History:...	USS Alacrity USS Alacrity (PG-87) USS Alacrity was an Action-class patrol boat acquired by the United States Navy for the task of patrolling American coastal waters during World War II....	PG-87	10 Dec 1942	"	Sold 22 Sept 1945
HMS Flax	K284	Kingston Shipbuilding Co. Ltd., Kingston Kingston, Ontario Kingston, Ontario is a Canadian city located in Eastern Ontario where the St. Lawrence River flows out of Lake Ontario. Originally a First Nations settlement called "Katarowki," , growing European exploration in the 17th Century made it an important trading post...	USS Brisk USS Brisk (PG-89) HMS Flax , a modified Flower class corvette, was laid down on 28 February 1942 at Kingston, Ontario, Canada, by War Supplies Ltd., for the Royal Navy. Launched on 15 June 1942 it was reallocated to the United States under the so-called "Reverse Lend-Lease" program and renamed and...	PG-89	6 Dec 1942	"	Sold 18 Oct 1946
HMS Mandrake	K287	Midland Shipyards Ltd., Midland Midland, Ontario Midland is a town located on Georgian Bay in Simcoe County, Ontario, Canada.Situated at the southern end of Georgian Bay's 30,000 Islands, Midland is the economic centre of the region, with a 125-bed hospital and a local airport. It is the main town of the southern Georgian Bay area...	USS Haste USS Haste (PG-92) Haste , was one of a group of Canadian corvettes turned over to the United States Navy and manned by the Coast Guard. She was launched as Mandrake by Morton Engineering & Dry Dock Co., Quebec, Canada, 22 August 1942, taken over by the US Navy renamed, and commissioned 6 April 1943, Lt. W. A...	PG-92	6 Apr 1943	"	Sold 1949
HMS Milfoil	K288	Midland Shipyards Ltd., Midland Midland, Ontario Midland is a town located on Georgian Bay in Simcoe County, Ontario, Canada.Situated at the southern end of Georgian Bay's 30,000 Islands, Midland is the economic centre of the region, with a 125-bed hospital and a local airport. It is the main town of the southern Georgian Bay area...	USS Intensity	PG-93	31 Mar 1943	"	Sold
HMS Musk	K289	Midland Shipyards Ltd., Midland Midland, Ontario Midland is a town located on Georgian Bay in Simcoe County, Ontario, Canada.Situated at the southern end of Georgian Bay's 30,000 Islands, Midland is the economic centre of the region, with a 125-bed hospital and a local airport. It is the main town of the southern Georgian Bay area...	USS Might USS Might (PG-94) USS Might was laid down as Canadian corvette CN-312 by Morton Engineering and Drydock Co., Ltd., Quebec, Canada, on 28 November 1941 and launched as HMCS Musk on 15 July 1942. The ship was transferred to the United States Navy on 20 July 1942, renamed Might on 14 August 1942, and commissioned at...	PG-94	22 Dec 1942	"	Sold
HMS Nepeta	K290	Midland Shipyards Ltd., Midland Midland, Ontario Midland is a town located on Georgian Bay in Simcoe County, Ontario, Canada.Situated at the southern end of Georgian Bay's 30,000 Islands, Midland is the economic centre of the region, with a 125-bed hospital and a local airport. It is the main town of the southern Georgian Bay area...	USS Pert USS Pert (PG-95) USS Pert , the second United States Navy ship of that name, was one of eight Canadian-built corvettes turned over to the U.S. Navy for operation by the United States Coast Guard. She was laid down by Morton Engineering and Dry Dock Co., Ltd., Quebec, Canada, 22 July 1942; launched...	PG-95	22 Dec 1942	"	Sold 18 Oct 1946
HMS Privet	K291	Midland Shipyards Ltd., Midland Midland, Ontario Midland is a town located on Georgian Bay in Simcoe County, Ontario, Canada.Situated at the southern end of Georgian Bay's 30,000 Islands, Midland is the economic centre of the region, with a 125-bed hospital and a local airport. It is the main town of the southern Georgian Bay area...	USS Prudent USS Prudent (PG-96) USS Prudent , originally ordered as HMS Privet, was an Action-class patrol gunboat in the United States Navy.Prudent was laid down by the Morton Engine and Dry Dock Company, Ltd., in Montreal, Quebec, on 14 August 1942; launched on 4 December 1942, sponsored by Mrs. Vincent Godfrey; delivered to...	PG-96	16 Aug 1943	"	Sold 1949

Transferred to RN

RN name	Pennant	Builder	USN name	Pennant	Completed	To RN	Fate
HMS Dittany	K279	Collingwood Shipyards Ltd., Collingwood Collingwood, Ontario Collingwood is a town in Simcoe County, Ontario, Canada. Geographically, it is situated on Nottawasaga Bay at the southern point of Georgian Bay.-History:...	USS Beacon	PG-88	31 May 1943	same day	Returned to USN 20 Jun 1946
HMS Honesty HMS Honesty (K285) The second USS Caprice , formerly CN-308, was launched 28 September 1942, by Kingston Shipbuilding Co., Kingston, Ontario, Canada, for the United States Navy...	K285	Kingston Shipbuilding Co. Ltd., Kingston Kingston, Ontario Kingston, Ontario is a Canadian city located in Eastern Ontario where the St. Lawrence River flows out of Lake Ontario. Originally a First Nations settlement called "Katarowki," , growing European exploration in the 17th Century made it an important trading post...	USS Caprice	PG-90	28 Mar 1943	"	Returned to USN 20 Jun 1946
HMS Linaria HMS Linaria (K282) HMS Linaria was a Flower-class corvette of the Royal Navy, which saw service during the Second World War. Originally built for the US Navy as Clash , formerly CN-309, she was launched on 18 November 1942, by Midland Shipyards, Ltd., Midland, Ontario, Canada. Upon completion Clash was transferred to...	K282	Midland Shipyards Ltd., Midland Midland, Ontario Midland is a town located on Georgian Bay in Simcoe County, Ontario, Canada.Situated at the southern end of Georgian Bay's 30,000 Islands, Midland is the economic centre of the region, with a 125-bed hospital and a local airport. It is the main town of the southern Georgian Bay area...	USS Clash	PG-91	19 Jun 1943	"	Returned to USN 27 Jul 1946
HMS Rosebay HMS Rosebay (K286) The HMS Rosebay was a U.S. Naval Ship built for World War II. She was disposed soon afterward....	K286	Collingwood Shipyards Ltd., Collingwood Collingwood, Ontario Collingwood is a town in Simcoe County, Ontario, Canada. Geographically, it is situated on Nottawasaga Bay at the southern point of Georgian Bay.-History:...	USS Splendor	PG-97	f	"	Returned to USN 20 Mar 1946
HMS Smilax HMS Smilax (K280) HMS Smilax was originally launched as Tact , a built for the United States Navy by Collingwood Shipyards, Ltd., Collingwood, Ontario, Canada—was launched on 14 November 1942...	K280	Collingwood Shipyards Ltd., Collingwood Collingwood, Ontario Collingwood is a town in Simcoe County, Ontario, Canada. Geographically, it is situated on Nottawasaga Bay at the southern point of Georgian Bay.-History:...	USS Tact	PG-98	21 Jun 1943	"	Returned to USN 5 Jan 1946
HMS Statice HMS Statice (K281) When the United States entered World War II at the end of 1941, the United States Navy found itself sadly deficient in ocean escort-type vessels. A crash building program was instituted; but, to meet more immediate needs, the government contracted with shipbuilding firms in England and Canada to...	K281	Collingwood Shipyards Ltd., Collingwood Collingwood, Ontario Collingwood is a town in Simcoe County, Ontario, Canada. Geographically, it is situated on Nottawasaga Bay at the southern point of Georgian Bay.-History:...	USS Vim	PG-99	20 Sep 1943	"	Returned to USN 21 Jun 1946
HMS Willowherb HMS Willowherb (K283) During the first year and more after America entered the war against the Axis, the United States Navy suffered from an acute shortage of warships, particularly of antisubmarine warfare and escort types. To fill that need, an extensive ship construction and acquisition program was inaugurated...	K283	Midland Shipyards Ltd., Midland Midland, Ontario Midland is a town located on Georgian Bay in Simcoe County, Ontario, Canada.Situated at the southern end of Georgian Bay's 30,000 Islands, Midland is the economic centre of the region, with a 125-bed hospital and a local airport. It is the main town of the southern Georgian Bay area...	USS Vitality	PG-100	30 Aug 1943	"	Returned to USN 11 Jun 1946