Aurantioideae

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Rosids
Cladus: Eurosids II
Ordo: Sapindales

Familia: Rutaceae
Subfamilia: Aurantioideae
Tribus: Aurantieae – Clauseneae

Genera: Aegle – Aeglopsis – Afraegle – Atalantia – Balsamocitrus – Burkillanthus – Citropsis – Citrus – Clymenia – Cneoridium – Glycosmis – Haplophyllum – Limnocitrus – Limonia – Luvunga – Merrillia – Metrodorea – Micromelum – Monanthocitrus – Murraya – Naringi – Pamburus – Paramignya – Pleiospermium – Poncirus – Swinglea – Triphasia – Wenzelia
Name

Aurantioideae Eaton (1836)

Type genus: Aurantium Mill.

Synonyms

Heterotypic
Limonioideae Horan., Char. Ess. Fam.: 204. 1847.
Type genus: Limonia L.

References

Eaton, A. 1836: Bot. Dict., ed. 4, 39.
Stevens, P.F. 2001 onwards. Angiosperm Phylogeny Website. Version 14, July 2017 [and more or less continuously updated since]. Online. Reference page.

Aurantioideae (sometimes known as Citroideae) 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.[1]

Notable members include citrus (genus Citrus), bael (Aegle marmelos), curd fruit (Limonia acidissima), species of genus Murraya such as curry tree (M. koenigii) and orange jessamine (M. paniculata), and the small genus Clausena.

Description
Micromelum minutum

Aurantioideae are smallish trees or large shrubs, or rarely lianas. Their flowers are typically white and fragrant. Their fruit are very characteristic hesperidia, usually of rounded shape and colored in green, yellowish or orange hues.[1]
Taxonomy

The subfamily has been divided into two tribes, the ancestral Clauseneae and the more advanced Citreae, as in a 1967 classification.[1] A 2021 classification by Appelhans et al. based on a molecular phylogenetic study of almost 90% of the genera of the family Rutaceae places about 27 genera in the subfamily, stating that it was not yet feasible to produce a division into tribes.[2] Other sources vary in the precise genera they accept.
Genera

Genera placed in Aurantioideae in Appelhans et al.'s 2021 classification of the Rutaceae into subfamilies are:[2]

Aegle Corrêa
Aeglopsis Swingle
Afraegle Engl.
Atalantia Corrêa
Balsamocitrus Stapf
Bergera J.Koenig ex L. – may be included in Murraya[3]
Burkillanthus Swingle
Citropsis (Engl.) Swingle & M.Kellerm. – cherry oranges
Citrus L. – citrus fruits (including Eremocitrus, Microcitrus and Poncirus)
Clausena Burm.f.
Feroniella Swingle – may be included in Citrus[4]
Glycosmis Corrêa
Limnocitrus Swingle – may be included in Pleiospermium[5]
Limonia L. – curd fruit
Luvunga Buch.-Ham. ex Wight & Arn.
Merope M.Roem.
Merrillia Swingle
Micromelum Blume
Monanthocitrus Tanaka
Murraya J.Koenig ex L.
Naringi Adans.
Pamburus Swingle
Paramignya Wight
Pleiospermium Swingle
Swinglea Merr.
Triphasia Lour.
Wenzelia Merr.

Genera that are not listed by Appelhans et al. include:[2]

Clymenia Swingle – may be included in Citrus[6]

References

Swingle, W. T. & Reece, P.C. (1967), The botany of Citrus and its wild relatives, University California Press, Los Angeles, CA., archived from the original on 2011-07-19
Appelhans, Marc S.; Bayly, Michael J.; Heslewood, Margaret M.; Groppo, Milton; Verboom, G. Anthony; Forster, Paul I.; Kallunki, Jacquelyn A. & Duretto, Marco F. (2021). "A new subfamily classification of the Citrus family (Rutaceae) based on six nuclear and plastid markers". Taxon. doi:10.1002/tax.12543.
"Bergera J.Koenig ex L.". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2021-09-14.
"Feroniella Swingle". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2021-09-16.
"Limnocitrus Swingle". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2021-09-14.

Stevens, P.F., "Rutaceae Genera", Angiosperm Phylogeny Website, Missouri Botanical Garden, retrieved 2021-09-12

Bibliography

de Araújo, E. Freitas; de Queiroz, L. Paganucci & Machado, M.A. (2003): What is Citrus? Taxonomic implications from a study of cp-DNA evolution in the tribe Citreae (Rutaceae subfamily Aurantioideae). Organisms Diversity & Evolution 3(1): 55-62. doi:10.1078/1439-6092-00058 (HTML abstract)