From the benzene extracts of two species of Dianellinae have been isolated two optically active flavans. We believe this to be the first report of the isolation of a natural flavan possessing optical activity, and indeed one of the few reports of a natural flavan not containing an oxygen atom attached to the heterocyclic ring. Previous examples are racemic 4',5,7-trimethoxyflavan, isolated from a methylated extract of a Xanthorrhoea, and 4'-methoxyflavan, isolated from the scent glands of the Canadian beaver (Castor fiber)2. We wish to report the isolation from Stypandra grandis of (-)-4'-hydroxy-7-methoxyflavan (I), and from Dianella revoluta of (-)-4'-hydroxy-7-methoxy-8-methylflavan (II).