Mahadeshwara ji, Can it this one? Somebody suggested it can be Lonchocarpus
183. Lonchocarpus sericeus, (Poir.) Kunth ex DC. --- Pink Lilac Tree<http://dl.dropbox.com/u/43406542/Flora%20and%20Fauna/Trees%20of%20Bangalore/Lonchocarpus%20-%20Pink%20Lilac%20Tree/Pink%20Lilac%20Tree.html> Raman
