This simple annual climbs or clambers upto 2 feet tall. Provide a simple support with a triangle of hazel twigs or canes. Black Eyed Susan do best in a sheltered position or as a conservatory plant. Also called Thunbergia Alata they are annuals that should grow easily from seed.
The late summer flowers are intense in colour and the name comes from the dark center or eye. Cream, white, yellow and orange varieties are available.

Thunbergia fragrans Angels Wings has twining stems with 2inch wide white flowers. Whilst notionally it is perennial it blooms well in the first year and can be treated as a half hardy annual.

Black Eyed Susan at Thompson & Morgan