Genus Thespesia is a type of flowering plant that belongs to the mallow family. It is commonly referred to as the flax-leaved hibiscus or the Portia tree. The genus was first described by botanist Carl Linnaeus in 1753 and comprises six known species.
In addition to its common names, the flax-leaved hibiscus may also be referred to as the beach hibiscus, the sea hibiscus, or the Hawaiian hibiscus, depending on the location and culture. The Portia tree may also be called the Indian tulip tree or the Pacific rosewood. Regardless of the name, the Genus Thespesia is known for its showy, trumpet-shaped flowers and diverse medicinal properties.