Monotypic Rubiaceae genera

Didymopogon is a monotypic genus of flowering plants in the family Rubiaceae. The genus contains only one species, viz. Didymopogon sumatranum, which is endemic to western Sumatra.

Riodocea is a genus of plants in the family Rubiaceae. It includes only one known species, Riodocea pulcherrima, indigenous to the Espírito Santo region of Brazil.

Schwendenera is a monotypic genus of flowering plants in the family Rubiaceae. The genus contains only one species, viz. Schwendenera tetrapyxis, which is endemic to Brazil.

Pseudodiplospora is a genus of flowering plants belonging to the family Rubiaceae.

Flexanthera is a genus of plants in the family Rubiaceae. It contains only one known species, Flexanthera subcordata, endemic to Colombia.

Khasiaclunea is a genus of plants in the family Rubiaceae. It has only one known species, Khasiaclunea oligocephala, known from the high mountains of the Darjeeling region of India through Assam and Bhutan to Burma (Myanmar).

Cinchonopsis is a monotypic genus of flowering plants in the family Rubiaceae containing the single species Cinchonopsis amazonica. It is native to South America, where it occurs in the Amazon basin to the eastern slopes of the Andes.

Janotia is a monotypic genus of flowering plants in the family Rubiaceae. The genus contains only one species, viz. Janotia macrostipula, which is endemic to Madagascar.

Microphysa elongata is a species of flowering plant in family Rubiaceae. It is a perennial native to Kazakhstan, Kyrgyzstan, Uzbekistan, and Xinjiang in Central Asia. It is the sole species in genus Microphysa.

Gallienia is a monotypic genus of flowering plants in the family Rubiaceae. The genus contains only one species, viz. Gallienia sclerophylla, which is endemic to Madagascar.

Crobylanthe is a monotypic genus of flowering plants in the family Rubiaceae. The genus contains only one species, viz. Crobylanthe pellacalyx, which is endemic to Sarawak.

Anthospermopsis is a monotypic genus of flowering plants in the family Rubiaceae. It was described by Joseph Harold Kirkbride Jr. in 1997. The genus contains only one species, viz. Anthospermopsis catechosperma, which is endemic to Bahia, Brazil.

Guihaiothamnus is a monotypic genus of flowering plants in the family Rubiaceae. The genus contains only one species, viz. Guihaiothamnus acaulis, which is only found in Rongshui County in southern China.

Duidania is a monotypic genus of flowering plants in the family Rubiaceae. The genus contains only one species, viz. Duidania montana, which is found in Guyana and southern Venezuela.

Acunaeanthus is a monotypic genus of flowering plants in the family of Rubiaceae. The genus contains only one known species; Acunaeanthus tinifolius, which is endemic to Cuba.

Tortuella is a genus of flowering plants belonging to the family Rubiaceae. It contains a single species, Tortuella abietifolia, a subshrub endemic to Haiti.

Adenorandia is a monotypic genus of flowering plants in the family Rubiaceae. It was described by Vermoesen in 1922. The genus contains only one species, viz. Adenorandia kalbreyeri, which is found from west-central tropical Africa.

Deccania is a monotypic genus of flowering plants in the family Rubiaceae. The genus contains only one species, viz. Deccania pubescens, which is endemic to India.

Aphanocarpus is a monospecific genus of flowering plants in the family Rubiaceae. It is placed in the tribe Psychotrieae.

Berghesia is a monospecific genus of flowering plants in the family Rubiaceae. It was described by Christian Gottfried Daniel Nees von Esenbeck in 1847. The genus contains only one species, viz. Berghesia coccinea, which is endemic to Mexico.

Ganguelia is a monotypic genus of flowering plants in the family Rubiaceae. The genus contains only one species, viz. Ganguelia gossweileri, which is endemic to Angola. It was established when the species Oxyanthus gossweileri was transferred to a new genus in the tribe Gardenieae.

Dolichometra is a monotypic genus of flowering plants in the family Rubiaceae. The genus contains only one species, viz. Dolichometra leucantha, which is endemic to the East Usambara Mountains in Tanzania.

Perakanthus is a monotypic genus of flowering plants in the family Rubiaceae. The sole species is Perakanthus velutinus, which is endemic to Peninsular Malaysia.

Robynsia is a monotypic genus of flowering plants in the family Rubiaceae. It was described by John Hutchinson and was named after his friend and colleague Walter Robyns. The genus contains only one species, Robynsia glabrata, which is found in Ghana, Ivory Coast and Nigeria. The species is morphologically similar to the genus Cuviera but differs by having long, slender corolla tubes.

Coddia is a monotypic genus of flowering plants in the family Rubiaceae. The genus contains only one species, viz. Coddia rudis, which is native to Mozambique, Zimbabwe, South Africa (the Cape Provinces, KwaZulu-Natal and the Northern Provinces), and Eswatini.

Ceratopyxis is a monotypic genus of flowering plants in the family Rubiaceae. The genus contains only one species, viz. Ceratopyxis verbenaceae, which is endemic to Cuba. It is a resinous small tree or bush with 4.5-8 centimeter oblong leaves. The fruit it produces is 4-5 millimeters in diameter, and with small hairs attached to the skin.

Coelopyrena is a monotypic genus of flowering plants in the family Rubiaceae. The genus contains only one species, viz. Coelopyrena salicifolia, which is endemic to the Maluku Islands.

Eizia is a monotypic genus of flowering plants in the family Rubiaceae. The genus contains only one species, viz. Eizia mexicana, which is found in Chiapas and Guatemala.

Dialypetalanthus is a genus of trees in the family Rubiaceae. It only contains one species, Dialypetalanthus fuscescens, which is found in Bolivia, Brazil and Peru.

Zuccarinia is a monotypic genus of flowering plants in the family of Rubiaceae. The genus contains only one species, i.e. Zuccarinia macrophylla, which is endemic to western Malesia, It is found in Jawa, Malaya and Sumatera.