The most beautiful vine in the world

The Bengal Clock Vine has been called by some "the most beautiful vine in the world". From a distance, this twining, flowering vine looks like a morning glory and even up close the flowers are quite similar. The curious name clock vine comes from the fact that it twines around a support in a clockwise direction. It is a vigorous evergreen vine and native to northern India. From the rope-like stems, that can reach to the top of large structure or even cover a good sized tree, emerge the dark green leaves that are leathery and have a distinctive elongated heart shape, 4-5 inches long and often have a slightly toothed margin. The beautiful 3 inch wide pale blue or white flowers are cup-like with pale yellow to cream blue striped centers.

Source: http://www.flowersofindia.net/catalog/slides/Bengal%20Clock%20Vine.html

Scientific name Thunbergia grandiflora . Common names include Bengal clockvine, Bengal trumpet, blue skyflower, blue thunbergia, blue trumpetvine, clockvine, skyflower and skyvine.

The bengal clockvine has been flowering non-stop for 2 weeks at my front porch