Thunbergia alata

Thunbergia alata, commonly called black-eyed Susan vine, is a herbaceous perennial climbing plant species in the family Acanthaceae. It is native to Eastern Africa, and has been naturalized in other parts of the world. It is found in Cerrado vegetation of Brazil and Hawaii, along with eastern Australia and the southern USA in the states of Texas and Florida and in Puerto Rico.
It is grown as an ornamental plant in gardens and in hanging baskets. The name 'Black-eyed Susan' is thought to have come from a character that figures in many traditional ballads and songs. In the "Ballad of Black-eyed Susan" by John Gay, Susan goes aboard a ship in-dock to ask the sailors where her lover Sweet William has gone. Black-eyed Susan is also a name given to other species of flowers in the genus "Rudbeckia".
Description.
"Thunbergia alata" has a vine habit, and can grow to a height of 6–8 ft (1.8-2.4 m) in tropical zones, or much less as a container plant or as an annual. It has twining stems with heart or arrow-shaped leaves. The flowers have five petals and appear throughout the growing season. They typically are warm orange with a characteristic dark spot in the centre, although different varieties can be red, orange, red-orange, white, pale yellow, or bright yellow, with or without the characteristic chocolate-purple centre which inspires the common name.
Cultivation.
"Thunbergia alata" seed is easy to germinate in humus-rich soil with some sand. Soaking the seeds in a dish of warm water over night will help improve seed germination when planted. It is a fast grower, blooming quickly, with light trimming encouraging more blossoms.
Distribution.
The plant is originary from East Africa, and has almost a world distribution including tropical and subtropical countries like China, Australia, USA, Mexico, South Africa, Portugal, Japan, New Zealand, Brazil, Argentina, Madagascar, India, Thailand and Phillipines, among others. 
It is used all around the world as a garten plant, but has managed to "escape" to the wilderness, naturalizing in tropical and temperate forests. It has been widely reported as Invasive species, especially in the Caribbean and Pacific islands, from Mexico to Colombia, and in Japan, due to the fast growing of the plant; the ease of wild pollination during sporadic flowering times; its vine-growing strategies that strangle or create shadow on other plants; its difficulty to eradicate by hand (as it leaves underground rhizomes that rapidly grow back); its lack of usual predators in non native regions; plus, people who are unaware of its harmful nature to other plants in the wilderness tend to admire its beauty and might opt not to remove it.