Leaves of Asperula odorata L., Rubiaceae. Habit. Europe, Siberia, North Africa, Australia. Constit. Coumarin, tannin, asperuloside, fatty oil, essential oil, bitter principle. Discussion of its fragrance, prepn of asperule absolute, use of Asperula in various fragrant formulations: Perfum. Essent. Oil Rec. 1963, (June) p 382.