Its members are known by various names, including thunbergias; clockvine on its own usually refers to Thunbergia grandiflora, while Thunbergia alata is often known as Black-eyed Susan vine or just Black-eyed Susan (not to be confused with other flowers called Black-eyed Susan).
Thunbergia annua (known as Annual thunbergia) is a herbaceous upright plant, in the genus Thunbergia, and is native to Africa.
Thunbergia fragrans is a perennial climbing twiner in the genus Thunbergia.
Thunbergia alata, commonly called Black-eyed Susan vine, is a herbaceous perennial climbing plant species in the Acanthaceae family.