Fagraea auriculata

About

Fagraea auriculata is a species of bush or semi-liana in the family Gentianaceae, formerly in the family Loganiaceae. It can be found in Indo-China and Malesia ; in Viet Nam it is called trai tai. It is noted for its huge, white, trumpet-shaped flowers; up to 30 cm (12 in) in both length and width. These flowers, the largest produced by any vine, are made of tissue up to 6 mm thick. The size, colour, heavy construction and the fact that they have a musty odour suggest that bats are important pollinators. The leaves are Magnolia-like in size and shape.

Summary from Wikipedia