Ipomoea carnea

Flowering shrub from many areas of tropical America, especially in coastal areas. Stems are hollow, leaves are elongated, hearth-shaped and a bit greyish. Flowers are profusely produced as large pink bells. It is placed in the genus of the Morning Glory and the sweet potato, which are typically vines. For this reason it is called "bushy morning glory". An old name was Ipomoea fistulosa and some authors call it Ipomoea carnea ssp. fistulosa.

Picture of the flower from Wikimedia Commons: 

https://commons.wikimedia.org/wiki/File:Ipomoea_carnea%27_flowers.JPG