Tomanthera auriculata (Michx.) Raf., an annual member of the Scrophulariaceae, is a rare species reported to be hemiparasitic. The species is currently under review by the U.S. Fish and Wildlife Service for possible listing as a federally threatened or endangered species. In greenhouse culture two of eight potential host species (Rudbeckia fulgida Ait. and Helianthus occidentalis Riddell) proved to be suitable hosts; Tomanthera auriculata seedlings in flats with these species grew to maturity, flowered, and produced viable seed. Photographs were taken to document the presence of haustoria on the roots of T. auriculata. This first reported success of culturing this species with selected hosts under greenhouse conditions is significant for recovery efforts and management of the species.