Goniothalamus grandiflorus

About

Goniothalamus grandiflorus is a species of rainforest tree in the Custard Apple Family Annonaceae. It is native to New Guinea and the Solomon Islands. It was first formally described by Otto Warburg, a German-Jewish botanist, using the basionym Beccariodendron grandiflorum after its big, dark red flowers. These flowers are borne directly on the trunk and major branches (cauliflory), the largest of all cauliflorous flowers.

Summary from Wikipedia