What is "pongamia"

Pongamia is a genus of legume in the Fabaceae family. Recently it was proposed that the genus Pongamia be rejected in favor of the genus Millettia and many species have been reclassified. Due to recent interest in biofuels, Pongamia is often the generic name given for Millettia pinnata, a tree being explored for producing biodiesel.