Blue Trumpet Vine (Thunbergia grandiflora)

This flower has a nice blue and yellow contrast.

This ornamental plant is vine-like but grows like a weed in the sense that it covers trees and shrubs.  It is very pleasing to eyes if maintained properly. Some find this plant to be an annoyance and others like that it can cascade down fences as decoration. It is an easy plant to maintain if used as an ornamental plant which makes it a great houseplant.

Picture taken from: www.wildlifeofhawaii.com