Delissea kauaiensis, syn: Delissea rhytidosperma, is known by the common names Kauai delissea, Kauai leechleaf delissea, and Leechleaf delissea. It is a rare species of flowering plant in the bellflower family, that is endemic to Hawaii where it is known only from the island of Kauai. It is extinct in the wild. Plants that formerly belonged to the species D. rhytidosperma are now called Delissea kauaiensis. It is a federally listed endangered species.