Flowers of the tropical region are usually brightly coloured or highly scented. But some are the exception. Even though they are scentless, they are still popular.Thunbergia fragrans has white flowers which are not fragrant at all. Some people say that it is the plant which is fragrant, but I don't get any smell. These yellow flowers still remain nameless, as I am unable to find their name. They too have no scent, but their colour is very bright.