This cluster of papers explores the medicinal properties of various Echinacea species, focusing on their chemistry, pharmacology, and clinical applications. It covers topics such as antioxidant activity, immunostimulating effects, treatment of upper respiratory tract infections, and the role of alkylamides and cichoric acid in modulating immune responses. The research also delves into the potential use of Echinacea in herbal medicine and its impact on inflammatory conditions.