The American Flower-class corvettes were those ships of the Royal Navy's Flower class built for, or operated by, the United States Navy during World War II. These were ten ships of the original Flower class, known as the Temptress class in US service, and fifteen Modified Flowers, as the Action class. In US service they were classified as Patrol Gunboats (PG).

The Flower-class corvette was a British class of 294 corvettes used during World War II by the Allied navies particularly as anti-submarine convoy escorts in the Battle of the Atlantic. Royal Navy ships of this class were named after flowers.