Venna tree.

Venna or Verenda is a well-known medicinal plant of Bengal. The fruits of this tree are round and have soft thorns, which are green when unripe and brown or black when ripe. The oil produced from the seeds of Venna is known worldwide as 'Castor Oil', which is very effective in hair and skin care. In ancient times, this oil was also used for cooking and lighting lamps. The Venna tree usually grows to a height of 10 to 15 feet and its leaves are quite large and grooved. Currently, due to urbanization, this beneficial tree is not seen as much as before and is on the verge of extinction