The venerable British luxury goods house Dunhill—best known for its tailored clothing and accessories—has created a new range of floral-printed swimwear just in time for summer. Currently available in stores, the shorts were designed by the company’s creative director, John Ray, who researched distinctly British flora for inspiration.

The five prints include vibrant blooms found on the British Isles, a seaweed print inspired by Victorian botanical drawings, and ferns and magnolias that grow in Ray’s own Lon…