Carduus Crispus is a scientific name that is commonly used to refer to a specific type of thistle plant. However, there are several synonyms for this term that can also be used interchangeably. Some of these synonyms include Cnicus benedictus, Centaurea benedicta, Blessed Thistle, Holy Thistle, and Spotted Thistle. Each of these names refers to the same plant, which is known for its sharp, prickly leaves and distinctive appearance. People have long used Carduus Crispus and its synonyms in herbal medicine to treat a variety of ailments, including digestive problems, fever, and infections.