The bark is bluish – grey, soft, with irregular furrows on the younger branches. Botanical name of Bilva Bark is is Aegle marmelos and t belongs to family Rutaceae. It is found throughout India, especially in dry forests. It is also cultivated for commertial purposes.Fruit of Bilva contains marmalosin, young bark contains coumarin, an umbelliferone; old bark has umbelliferone and coumarin.