Monotypic Lamiales genera

Hemiarrhena is a monotypic genus of flowering plants belonging to the family Linderniaceae. The only species is Hemiarrhena plantaginea.

Pajanelia, sometimes known in English as tender wild jack or pajanelia, in Malayalam as azhantha or pajneli, in Kannada as alangi and in Tamil as aranthal, is a monotypic genus of evergreen or briefly deciduous flowering tree in the family Bignoniaceae which contains a single species, Pajanelia longifolia.

Dasistoma macrophylla, commonly known as mullein foxglove, is a species of flowering plant in the broomrape family. It is monotypic, with no other species in the genus Dasistoma.

Holoregmia is a monotypic genus of flowering plants belonging to the family Martyniaceae. The only species is Holoregmia viscida.

Dicranostegia is a monotypic genus of hemiparasitic flowering plants belonging to the family Orobanchaceae, containing the species Dicranostegia orcuttiana, commonly known as '''Orcutt's bird's beak or Baja bird's beak'''. It is near-endemic to Baja California, found from Miller's Landing north to Tijuana, but has a few occurrences in southern San Diego County, California. It is differentiated among other similar species (like Cordylanthus spp.) in California by its leaves with 8 to 11 lateral lobes that are paired. It was formerly placed in the genus Cordylanthus until phylogenetic analysis l

Mayodendron is a monotypic genus in the flowering plant family Bignoniaceae. The single species it contains, Mayodendron igneum, is native to southern China, India, Laos, Myanmar, and Vietnam. It is sometimes included within Radermachera.

Leptorhabdos is a monotypic genus of flowering plants, initially classified in Scrophulariaceae, and now within the broomrape family Orobanchaceae. It contains a single species, Leptorhabdos parviflora.