Thunbergia gregorii, an evergreen vine that grows up to ten feet tall, looks similar to the black-eyed Susan vine, which is also known as Thunbergia alata, and is native to east Africa.
Thunbergia gregorii is an evergreen vine that grows to 810 ft. tall, or if left without support can become an extensive groundcover. It looks like the related black-eyed Susan vine (T. alata), but without the black eye. Thunbergia gregorii is native to east Africa, and is pollinated by bees. 
