Listen to O flos convallium online. O flos convallium is an English language song and is sung by De Cesson-Sevigne, Les Petits Chanteurs de Saint-Martin, Alain Cherel, Jean-Paul Lécot, Choeur D'Enfants De Bretagne-Cathédrale De Rennes and Frédéric Dupuy. O flos convallium, from the album Lourdes: 150 ans de chants, was released in the year 2007. The duration of the song is 1:57. Download English songs online from JioSaavn.