Ursolic and oleanolic acids have been identified in Anthocercis littorea, Anthocercis odgersii, and the coastal form of Alyxia buxifolia. Oleanolic acid has also been obtained from Petalostigma sericea. Betulic acid has been obtained from the inland form of Alyxia buxifolia, from Nuytsia floribunda and from six Melaleuca species. "Melaleucin" is probably betulic acid.