It is a fast grower, blooming quickly, with light trimming encouraging more blossoms. Soaking the seeds in a dish of warm water over night will help improve seed germination when planted. Thunbergia alata seed is easy to germinate in humus-rich soil with some sand and it can be grown from cuttings. At the base they have a diameter of seven millimeters. The 16 to 18 millimeter long fruits are finely hairy. The corolla tube measures around four centimeters and shows five two centimeter large corolla lobes with right-hand covering buds on the outside. The serrated calyx is about two millimeters long and has between 15 and 17 awl-shaped lobes. They are 18 to 20 millimeters long and nine to ten millimeters wide. Each of the single flowers has two triangular to oval, hairy bracts that taper towards the outside. The central two centimeter long corolla tube is black-violet. They typically are warm orange with a characteristic dark spot in the centre. The hairy, mostly orange-yellow flowers have five petals and appear throughout the growing season, which grow on up to eight and a half centimeters long inflorescence axes. The leaf blades sit on up to six and a half centimeters long petioles, which attach at a distance of four and a half to 13 centimeters on the one to one and a quarter millimeter thick stem axis. Their edges are wavy and both surfaces are hairy. The three and a half to seven and a half centimeters long and two and a half centimeters wide leaves are triangular to heart-shaped. It has twining stems with heart or arrow-shaped leaves. Thunbergia alata has a vine habit, and can grow to a height of 5 metres (16 ft) high in warmer zones, or much less as a container plant or as an annual. Black-eyed Susan is also a name given to other species of flowers in the genus Rudbeckia. 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. The name 'Black-eyed Susan' is thought to have come from a character that figures in many traditional ballads and songs. It is grown as an ornamental plant in gardens and in hanging baskets. It is native to Eastern Africa, and has been naturalized in other parts of the world. Thunbergia alata, commonly called black-eyed Susan vine, is a herbaceous perennial climbing plant species in the family Acanthaceae.
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