Penstemon, the beardtongues, is a large genus of roughly 250 species of flowering plants native mostly to the Nearctic, but with a few species also found in the North American portion of the Neotropics. It is the largest genus of flowering plants endemic to North America. Formerly placed in the family Scrophulariaceae by the Cronquist system, new genetic research has placed it in the vastly expanded family Plantaginaceae.
Stachys is one of the largest genera in the flowering plant family Lamiaceae. Estimates of the number of species in the genus vary from about 300, to about 450. The type species for the genus is Stachys sylvatica. Stachys is in the subfamily Lamioideae. Generic limits and relationships in this subfamily are poorly known.
Ruellia is a genus of flowering plants commonly known as ruellias or wild petunias. They are not closely related to petunias (Petunia) although both genera belong to the same euasterid clade. The genus was named in honor of Jean Ruelle (1474–1537), herbalist and physician to Francis I of France and translator of several works of Dioscorides.
Orbexilum, commonly called leather-root, is a genus of flowering plants in the legume family (Fabaceae). They are native to North America, where they are found in the United States and Mexico, south to Chiapas.
Psacalium is a genus of flowering plants in the sunflower family. Indianbush is a common name for Psacalium.
Lumnitzera is an Indo-West Pacific mangrove genus in the family Combretaceae. An English common name is black mangrove. Lumnitzera, named after the German botanist, Stephan Lumnitzer (1750-1806), occurs in mangroves from East Africa to the Western Pacific, and northern Australia.
Mesosphaerum is a genus of flowering plants in the family Lamiaceae, native to the New World Tropics and Subtropics. Two species, Mesosphaerum pectinatum and Mesosphaerum suaveolens, have been introduced to the Old World, with M. suaveolens found in the tropics of Africa, Asia and Australia.
Darcya is a genus of flowering plants belonging to the family Plantaginaceae.
Pedersenia is a genus of flowering plants belonging to the family Amaranthaceae.
Escobedia is a genus of flowering plants belonging to the family Orobanchaceae.
Lamourouxia is a genus of flowering plants belonging to the family Orobanchaceae.
Macbrideina is a monotypic genus of flowering plants belonging to the family Rubiaceae. It only contains one known species, Macbrideina peruvianaStandl.
Mortoniodendron is a genus of flowering plants belonging to the family Malvaceae.
Schistophragma is a genus of flowering plants belonging to the family Plantaginaceae.
Pisoniella is a monotypic genus of flowering plants belonging to the family Nyctaginaceae. It only contains one known species, Pisoniella arborescens(Lag. & Rodr.) Standl.
Ladeania is a genus of flowering plants belonging to the family Fabaceae. It is also in the Psoraleeae tribe.
Pennellia is a genus of flowering plants belonging to the family Brassicaceae.
Eplingiella is a genus of flowering plants belonging to the family Lamiaceae.
Martianthus is a genus of flowering plants belonging to the family Lamiaceae.
