Pittosporum undulatum and P. bicolor occasionally hybridise, the hybrid having been recorded from the Dandenong, Otway and Strzelecki Ranges, Wilsons Promontory, East Gippsland, New South Wales and Tasmania. Hybrid plants tend to have foliage with persistent indumentum on the lower surface like that of P. bicolor, flowers of P. undulatum, and fruits with orange seeds.
