Blessed thistle also known as holy thistle and Saint Benedict thistle, this Mediterranean native once provided hope for victims of the bubonic plague and served as a rejuvenating tonic for Benedictine monks. Reputedly, one monk, Don Bernardo Vincelli, created a stimulating concoction that included more than two dozen herbs, blessed thistle among them. Today, blessed thistle still lends its flavor to Benedictine liquor (although the complete recipe is a closely guarded secret). The herb is also enjoyed in digestive tea blends and herbal bitters.