LIU M (REBECCA), VAN WYK BE, TILNEY PM. ONTOGENY OF THE FRUITS OF TWO ANOMALOUS AFRICAN WOODY GENERA, POLEMANNIOPSIS AND STEGANOTAENIA (APIACEAE), AND THEIR PHYLOGENETIC RELATIONSHIP. Edinburgh J. Bot. 2004;60(3):249-257. doi:10.1017/S0960428603000222