HMS Periwinkle was a Flower-class corvette, built for the Royal Navy during the Second World War, and was in service in the Battle of the Atlantic.

In 1942 she was transferred to the United States Navy as part of the Reverse Lend-Lease arrangement and renamed USS Restless, one of the Temptress-class gunboats.

Periwinkle was built at Harland & Wolff, Belfast, as part of the 1939 War Emergency building program.

As built, Periwinkle had the short forecastle that was a feature of the early Flowers, and which adversely effected their habitability.

[6] On 14 October 1940 Periwinkle and the destroyer HMCS Skeena rescued 220 members of the crew of HMS Cheshire, which U-137 had damaged by torpedo.