Diodia is a genus of flowering plants in the family Rubiaceae. It was described by Carl Linnaeus in 1753. The genus is found from southern and eastern United States, South America, Central America, Mexico, the West Indies and tropical Africa.
Houstonia (bluet) is a genus of plants in the family Rubiaceae. Many species were formerly classified, along with other genera since segregated elsewhere, in a more inclusive genus Hedyotis.
Oldenlandia is a genus of flowering plants in the family Rubiaceae. It is pantropical in distribution and has about 240 species. The type species for the genus is Oldenlandia corymbosa.
Hedyotis (starviolet) is a genus of flowering plants in the family Rubiaceae. Many species of this genus such as Hedyotis biflora, H. corymbosa and H. diffusa are well known medicinal plants. Hedyotis is native to tropical and subtropical Asia and to islands of the northwest Pacific. It comprises about 115 species. The type species for the genus is Hedyotis fruticosa.
Kadua is a genus of flowering plants in the family Rubiaceae. It comprises 29 species, all restricted to Polynesia. Twenty-two of these are endemic to the Hawaiian Islands. Some of the species are common at high elevation. Others are single-island endemics or very rare, and a few are probably extinct. Kadua affinis is widely distributed in Hawaii and is polymorphic. The type species for the genus is Kadua acuminata.
Arcytophyllum is a genus of flowering plants in the family Rubiaceae. The genus contains 18 species, distributed from New Mexico to Bolivia.
Dimetia is a genus of flowering plants in the family Rubiaceae. The genus is found from the Indian subcontinent to south-central China and west and central Malesia.
Edrastima is a genus of flowering plants in the family Rubiaceae. The genus widespread and is found in Central and Eastern USA and the tropics and subtropics.
Exallage is a genus of flowering plants in the family Rubiaceae. The genus is found from tropical and subtropical Asia to the southwestern Pacific.
Hedyotis verticillaris is a plant belonging to the family Rubiaceae that is endemic to the higher altitude grasslands of the Nilgiris in southern India. Unlike many others members of the genus the stems of this species are underground and the leaves appear close to the ground forming rosettes and usually hold some water at the centre of the whorl of leaves. The flowers are produced on a stalk.
Rubioideae Juss., 1789 is a subfamily of flowering plants in the family Rubiaceae and contains about 7600 species in 27 tribes.
Pavetteae is a tribe of flowering plants in the family Rubiaceae and contains about 624 species in 9 genera. Its representatives are found from the tropics and subtropics of the Old World and the southern Pacific region.
Sabiceeae is a tribe of flowering plants in the family Rubiaceae and contains about 164 species in 7 genera. Its representatives are found in tropical Africa, Madagascar, Sri Lanka, and from Mexico to tropical America. The genus Sabicea is one of the rare genera in Rubiaceae that occurs both in tropical Africa and tropical America.
Cordiereae is a tribe of flowering plants in the family Rubiaceae and contains 124 species in 12 genera. Its representatives are found in central and southern tropical America.
Coussareeae is a tribe of flowering plants in the family Rubiaceae and contains 407 species in 10 genera. The former tribe Coccocypseleae Bremek., consisting of Coccocypselum, Declieuxia, and Hindsia, is considered part of Coussareeae. Its representatives are found in Central and South America.
Debia is a genus of flowering plants in the family Rubiaceae. The genus is found from the Indian subcontinent to south-central China and the Philippines.
Leptopetalum is a genus of flowering plants in the family Rubiaceae. The genus is widespread in tropical and subtropical Asia and the Pacific.
