Galium odoratum syn. Asperula odorata, is a flowering perennial plant in the family Rubiaceae, native to Europe, North Africa and Western Asia.
A herbaceous plant, it grows to 30–50 cm (12-20 ins.) long, often lying flat on the ground or supported by other plants. Its vernacular names include woodruff, sweet woodruff, and wild baby's breath; master of the woods would be a literal translation of the German Waldmeister. It is sometimes confused with Galium triflorum and Galium verum.
It owes its sweet smell to the odiferous agent coumarin, and is sometimes used as a flavoring agent due to its content of this chemical.