Rubia is a genus of flowering plants in the family Rubiaceae. It contains around 80 species of perennial scrambling or climbing herbs and subshrubs native to the Old World. The genus and its best-known species are commonly known as madder, e.g. Rubia tinctorum, Rubia peregrina, and Rubia cordifolia.
The genus Huernia consists of perennial, stem succulents from Eastern and Southern Africa and Arabia, first described as a genus in 1810.
Pennisetum is a widespread genus of plants in the grass family, native to tropical and warm temperate regions of the world. They are known commonly as fountaingrasses. Pennisetum is considered a synonym of Cenchrus in Kew's Plants of the World Online.
Cynanchum is a genus of about 300 species including some swallowworts, belonging to the family Apocynaceae. The taxon name comes from Greek kynos and anchein, hence the common name for several species is dog-strangling vine. Most species are non-succulent climbers or twiners. There is some evidence of toxicity.
Sarcostemma is a genus of flowering plants in the dogbane family, Apocynaceae, first described as a genus in 1810. The name is derived from the Greek words σαρκὸς (sarkos), meaning "flesh," and στέμμα (stemma), meaning "garland". Members of the genus are known generally as climbing milkweeds or caustic bushes. They are found across Africa and tropical Asia, in Australia, and in parts of North America. These plants are perennial flowering shrubs with trailing vines or lianas. They are often adapted to heat and/or desert conditions. Some have few or no leaves and photosynthesize in the tissues of the green stems. The soft stems are filled with a milky white latex that is poisonous and caustic in some species. The flowers have a ring of thick tissue at the base which extends into hollow spherical appendages within the flower corolla.
Triraphis is a genus of African, Arabian, Australian, and Brazilian plants in the grass family. Needlegrass is a common name for plants in this genus.
Rhazya is a genus of plant in family Apocynaceae first described as a genus in 1835. It is native to Egypt and to southwestern Asia from Yemen to India.
Dregea is a genus of vines in the Apocynaceae, first described as a genus with this name in 1838. It is native to Africa and southern Asia.
- Dregea abyssinica(Hochst.) K.Schum. - Ethiopia
- Dregea crinita(Oliv.) Bullock - Nigeria
- Dregea cuneifoliaTsiang & P.T.Li - Guangxi Province in China
- Dregea faulkneraeBullock - Tanzania
- Dregea floribundaE.Mey. - South Africa
- Dregea lanceolata(Cooke) Santapau & Wagh - Maharashtra
- Dregea rubicundaK.Schum. - Kenya, Uganda
- Dregea sinensisHemsl. - China
- Dregea schimperi(Decne.) Bullock - Ethiopia
- Dregea stelostigma(K.Schum.) Bullock - tropical Africa
- Dregea volubilis(L.f.) Benth. ex Hook.f. - China Bangladesh, Cambodia, India, Indonesia, Kashmir, Laos, Malaysia, Nepal, Philippines, Sri Lanka, Thailand, Vietnam
- Dregea yunnanensis(Tsiang) Tsiang & P.T.Li - China
- Dregea volubilisStapf - Sri Lanka
Blyttia is a small genus of perennial vines in the dogbane family first described as a genus in 1838. It is found in the Arabian Peninsula, Yemen, Saudi Arabia, Somalia, Djibouti, Senegal, Ethiopia, Kenya, Israel, Tanzania, South Africa, Sri Lanka, India, Pakistan, Mali, and Chad.
Echidnopsis is a genus of succulent, cactus-like plants in the family Apocynaceae, first described as a genus in 1871. They are native to eastern Africa and the Arabian Peninsula.
Astephanus is a genus of flowering plants in the family Apocynaceae, first described as a genus in 1810.
Leptadenia is a genus of plants in the family Apocynaceae, first described as a genus in 1810. It is native to Africa, including Madagascar, as well as southwest Asia and the Indian Subcontinent.
- Leptadenia arborea(Forssk.) Schweinf. - Sudan, Ethiopia
- Leptadenia lancifolia(Schumach. & Thonn.) Decne. - tropical Africa
- Leptadenia madagascariensisDecne. - Madagascar
- Leptadenia pyrotechnica(Forssk.) Decne. - widespread from Algeria to India
- Leptadenia reticulata(Retz.) Wight & Arn. - Madagascar
Pachycarpus is a genus of plants in the family Apocynaceae, first described in 1838. It is native to Africa.
Pentarrhinum is a genus of plants in the family Apocynaceae, first described as a genus in 1838. It is native to Africa.
- Pentarrhinum abyssinicumDecne. - E + C + S Africa
- Pentarrhinum balense(Liede) Liede - Ethiopia
- Pentarrhinum coriaceumSchltr. - KwaZulu-Natal
- Pentarrhinum gonoloboides(Schltr.) Liede - Tanzania
- Pentarrhinum insipidumE.Mey. - South Africa
- Pentarrhinum ledermannii(Schltr.) Goyder & Liede - Burundi
- Pentarrhinum somaliense(N.E. Br.) Liede - Somalia
Pentatropis is a genus of plants in the family Apocynaceae, first described as a genus in 1834. It is native to Africa and southern Asia.
Pentopetia is a plant genus in the family Apocynaceae, first described as a genus in 1844.
Pleurostelma is a genus of plants in the Apocynaceae, first described in 1890. It is native to Africa, including Madagascar.
- Pleurostelma cernuum(Decne.) Bullock - Madagascar, Pemba Island in Tanzania
- Pleurostelma schimperi(Vatke) Liede - Ethiopia
Tacazzea is a genus of plants in the family Apocynaceae, first described in 1890. It is native to Africa.
Rhytidocaulon is a plant genus in the family Apocynaceae, first described in 1962. It is native to northeastern Africa and the Arabian Peninsula
- Rhytidocaulon paradoxumP.R.O.Bally - Ethiopia
- Rhytidocaulon piliferumLavranos - Somalia
- Rhytidocaulon richardianumLavranos - Somalia
- Rhytidocaulon subscandensP.R.O.Bally - Somalia, Ethiopia
- Rhytidocaulon tortum(N.E.Br.) M.G.Gilbert - Arabia
