Pleiospermium littorale
Pleiospermium littorale is a plant in the citrus family Rutaceae native to southeast Vietnam and the island of Java in Indonesia, where it inhabits coastal areas and plays a role in erosion prevention. In traditional Vietnamese medicine different parts of the plant have been used as an expectorant, cough suppressant, for exudation, and the treatment of colds and fevers.
It is an endangered species threatened by habitat loss.