Thunbergia is a genus of flowering plants in the family Acanthaceae native to tropical regions of Africa Madagascar and southern Asia. 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). Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
A:
Plant