The roots of Cichorium pumilum afforded two new guaianolides, 10 β -hydroxyguaia-4,13-dien-6,12-olide and the corresponding 11ß,13-dihydro derivative which could be separated only after transforming the methylene lactone into the corresponding pyrazoline. The structures were elucidated by 400 MHz 1H NMR spectroscopy. The chemotaxonomic situation is discussed briefly