A new species of Pantadenia Gagnep. from Madagascar is described; it resembles the other previously known Madagascan species (Pantadenia chauvetiae (Leandri) G.L.Webster) in ovary and fruit morphology, but differs from it in its arborescent habit, narrower and less pubescent leaves, glabrous and minutely bracteate inflorescence, and glabrous and typically 4-merous calyx.