Ophioglossum, the adder's-tongue ferns, is a genus of about 50 species of ferns in the family Ophioglossaceae. The name Ophioglossum comes from the Greek, and means "snake-tongue". The genus has the largest number of chromosomes in the known plant kingdom, but contrary to popular belief does not have the largest number of chromosomes out of all known organisms, falling short to the protist Oxytricha trifallax.
Anacardium, the cashews, are a genus of flowering plants in the family Anacardiaceae, native to tropical regions of the Americas.
Cassia is a genus of flowering plants in the legume family, Fabaceae, and the subfamily Caesalpinioideae. Species are known commonly as cassias. Cassia is also the English common name of some species in the genus Cinnamomum of the family Lauraceae. Species of the genera Senna and Chamaecrista were previously included in Cassia. Cassia now generally includes the largest species of the legume subtribe Cassiinae, usually mid-sized trees.
Combretum, the bushwillows or combretums, make up the type genus of the family Combretaceae. The genus comprises about 272 species of trees and shrubs, most of which are native to tropical and southern Africa, about 5 to Madagascar, but there are others that are native to tropical Asia, New Guinea and the Bismarck Archipelago, Australia, and tropical America. Though somewhat reminiscent of willows (Salix) in their habitus, they are not particularly close relatives of these.
Sesamum is a genus of about 20 species in the flowering plant family Pedaliaceae. The plants are annual or perennial herbs with edible seeds. The best-known member of the genus is sesame, Sesamum indicum, the source of sesame seeds. The species are primarily African, with some species occurring in India, Sri Lanka, and China. The origin of S. indicum is uncertain, as it is widely cultivated and naturalized in tropical regions. The genus is closely related to the strictly African genus Ceratotheca and is itself probably African in origin.
Costus is a group of herbaceous perennial plants in the family Costaceae, described by Linnaeus as a genus in 1753. It was formerly known as Hellenia after the Finnish botanist Carl Niclas von Hellens. It is widespread through tropical and subtropical regions of Asia, Africa, and the Americas.
Faurea is a genus containing 15 species of flowering plants in the protea family which occur in the summer rainfall area of southern Africa, extending to tropical Africa and Madagascar. The name honours South African soldier and botanist William Caldwell Faure (1822-1844) who was killed on active service in India.
Gymnosporia is an Old World genus of plants, that comprise suffrutices, shrubs and trees. It was formerly considered congeneric with Maytenus, but more recent investigations separated it based on the presence of achyblasts and spines, alternate leaves or fascicles of leaves, an inflorescence that forms a dichasium, mostly unisexual flowers, and fruit forming a dehiscent capsule, with an aril on the seed.
Ammannia is a genus of around 100 species of plants often referred to as redstems from wet areas in America, Africa, Asia, Australia and Europe. Several species are grown as decorative plants in aquariums.
Oxygonum is a genus of plants in the family Polygonaceae with about 30 species. It is native to eastern parts of Africa and to the Arabian Peninsula.
Salacia is a genus of plants in the family Celastraceae. They are woody climbers naturally found in tropical regions.
Platysepalum is a genus of flowering plants in the legume family, Fabaceae. It belongs to the subfamily Faboideae. Species in the genus include:
Fadogia is a genus of flowering plants in the family Rubiaceae. The genera Rytigynia and Fadogia form a strongly supported clade but neither of these genera is monophyletic.
Aframomum is a genus in the ginger family, Zingiberaceae. It is widespread across tropical Africa as well as on some islands of the Indian Ocean. It is represented by approximately 50 species. It is larger than other genera in its family. Its species are perennials and produce colorful flowers.
Hippocratea is a genus of flowering plants in the family Celastraceae, usually lianas, native to tropical and subtropical North America, South America and Africa.
Trochantha is a genus of flowering plants belonging to the family Celastraceae.
Loeseneriella is a genus of flowering plants belonging to the family Celastraceae.
