Bark
Typically grey-brown, smooth or vertically fissured, often with lenticels, and breaks into channeled pieces that are ash-grey externally and yellowish-white internally.
Syn. Derris indica
Typically grey-brown, smooth or vertically fissured, often with lenticels, and breaks into channeled pieces that are ash-grey externally and yellowish-white internally.
Pinnate with 5–7 broad leaflets.
Small, fragrant, pea-like (papilionaceous) blooms, typically white or pinkish-white with purple/brown veins.
Hard, woody, flattened, oblong pod, typically containing one kidney-shaped seed, reddish-brown, about 2 cm long.
Before modern toothbrushes became common, the twigs of the Karanja tree (Pongamia pinnata) were used as chew sticks (datan) in rural India for traditional oral hygiene.
Tropical & Subtropical Asia to W. Pacific, Uganda, Windward Is.