Hibiscus macrophyllus
Hibiscus macrophyllus, the largeleaf rosemallow, is an Asian species of tropical forest tree in the subfamily Malvoideae, with large leaves and yellow flowers. Its native range is southern China, Indo-China and western Malesia (including the Philippines). Uses
H. macrophyllus can be grown as an ornamental plant and may be made into a green tea. References

macrophyllus
Flora of Indo-China