Seven triterpenoids and two flavonoids were isolated from the roots and aerial parts of Paeonia lactiflora, respectively. This is the first report of triterpenoids, which is a new triterpene assigned as 11 alpha,12 alpha-epoxy-3 beta, 23-dihydroxy-30-norolean-20(29)-en-28,13 beta-olide, from this plant. Copyright (C) 1996 Elsevier Science Ltd