The Libraries of the Royal Horticultural Society hold the world's finest collection of printed material on gardens and gardening and a selection of the best botanical paintings from this collection is featured here. One Hundred Flowers from the RHS gathers together the most striking images to create 100 different postcards to send, keep, or frame. The earliest works of art date from the late 17th or early 18th century, and are by an anonymous Italian artist; the latest are from the middle of the 20th century.