Q : what do you mean by Bodhi Tri ?
Ans. : During the Buddha’s time The Tree was 100ft height but as Huien Tsiang visit to Bodhagaya at time the Tree was 50ft height. It is called Bodhi Tree because of Siddhartha got enlightenment under it. Asoka himself destroyed Bodhi Tree one time, before he did believe Buddhism also his wife (queen) destroyed Bodhi Tree one time.
Tissarakkha Asoka's younger queen was jealous over Bodhi Tree because of Asoka went to worship the Bodhi Tree frequently so she destroyed.