Kumquats, or cumquats in Australian English, are a group of small, angiosperm, fruit-bearing trees in the family Rutaceae. Their taxonomy is disputed. They were previously classified as forming the now-historical genus Fortunella or placed within Citrus, sensu lato. Different classifications have alternatively assigned them to anywhere from a single species, C. japonica, to numerous species representing each cultivar. Recent genomic analysis defines three pure species, Citrus hindsii, C. margarita and C. crassifolia, with C. x japonica being a hybrid of the last two.
Calamansi, also known as kalamansi, calamondin, Philippine lime, or Philippine lemon, is an economically important citrus hybrid predominantly cultivated in the Philippines. It is native to the Philippines, parts of Indonesia, Malaysia, and Brunei, as well as parts of southern China and Taiwan.
The trifoliate orange, Citrus trifoliata, is a member of the family Rutaceae. Whether the trifoliate oranges should be considered to belong to their own genus, Poncirus, or be included in the genus Citrus is debated. The species is unusual among citrus for having deciduous, compound leaves and pubescent (downy) fruit.
Murraya is a genus of flowering plants in the citrus family, Rutaceae. It is distributed in Asia, Australia, and the Pacific Islands. The center of diversity is in southern China and Southeast Asia. When broadly circumscribed, the genus has about 17 species. A narrower circumscription contains only eight species, others being placed in Bergera and Merrillia.
Citropsis is a genus of flowering plants in the citrus family, Rutaceae. They are known generally as African cherry oranges. They are native to Africa.
Citrus australis, the Dooja, round lime, Australian lime or Australian round lime, is a large shrub or small tree producing an edible fruit. It grows in forest margins in the Beenleigh area and northwards, in Queensland, Australia.
Limnocitrus is a genus of plant in the family Rutaceae with one species, Limnocitrus littoralis. It is native to Vietnam and Indonesia, where it is found on the island of Java in Jepara. In traditional Vietnamese medicine different parts of the plant have been used as an expectorant, antitussive product, for exudation, and the treatment of colds and fevers.
Merrillia is a monotypic genus of flowering plants in the citrus family, Rutaceae, containing the single species Merrillia caloxylon. Its English language common names include flowering merrillia, katinga, and Malay lemon. In Malaysia it is called ketenggah and kemuning gajah. The species is native to Malaysia, Thailand, and Sumatra in Indonesia.
The false oranges are a group of flowering plants in the Citrus genus, within the family, Rutaceae. They are endemic to New Caledonia.
Citrus neocaledonica, synonym Oxanthera neocaledonica, the large leaf oxanthera, is a species of plant in the family Rutaceae. It is endemic to New Caledonia.
Citrus undulata, synonym Oxanthera undulata, the wavy-leaf oxanthera, is a species of plant in the family Rutaceae. It is endemic to New Caledonia.
Aurantioideae is the subfamily within the rue and citrus family (Rutaceae) that contains the citrus. The subfamily's center of diversity is in the monsoon region of eastern Australasia, extending west through South Asia into Africa, and eastwards into Polynesia.
Citrus macroptera, also known as shatkora or hatkhoracabuyao, Melanesian papeda, or wild orange, is a semi-wild species of citrus native to the Sylhet region of Bangladesh.
Citrofortunella are a large group of commercial hybrids that cross the kumquat with other citrus. In the system of citrus taxonomy established by Swingle, kumquats were placed in a different genus, Fortunella, from Citrus, which included citron, mandarin orange, pomelo and papedas. The result of genetic crosses between kumquats and these other citrus would then be intergeneric hybrids, so a novel genus name was coined for them in 1975, by compounding the names of the contributing genera to form Citrofortunella. That the genus is of a hybrid nature is represented by a multiplication sign before the genus name, for example × Citrofortunella microcarpa. Recent phylogenetic work has shown kumquats to fall within Citrus rather than belonging to a distinct genus, meaning these would no longer be considered intergeneric hybrids, and use of Citrofortunella as a distinct genus name for these hybrids loses taxonomic validity. All would be placed instead within Citrus.
Clymenia is a small genus of flowering plants in the family Rutaceae with two species. The genus is often included in Citrus.
Clausena is a genus of flowering plants in the citrus family, Rutaceae. It was first defined by the Dutch botanist Nicolaas Laurens Burman in 1768. It is distributed in Africa, southern Asia, Australia, and the Pacific Islands.
Micromelum is a genus of eight species of flowering plants in the family Rutaceae.
Citrus taxonomy refers to the botanical classification of the species, varieties, cultivars, and graft hybrids within the genus Citrus and related genera, found in cultivation and in the wild.
Atalantia is a genus of flowering plants in the citrus family, the Rutaceae.
Bergera is a genus of flowering plants in the family Rutaceae. It has been included in Murraya as M. sect. Bergera. Species that may be placed in the genus are native from India through southeast Asia eastwards to China and Taiwan southwards to Malesia and New Caledonia. The curry tree, Bergera koenigii, is one of the better known species.
