Ixoroideae

Ixoroideae

Ixora coccinea
Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Eudicots
(unranked):	Asterids
Order:	Gentianales
Family:	Rubiaceae
Subfamily:	Ixoroideae
Tribes
Airospermeae Kainul. & B.Bremer Alberteae Hook.f. Aleisanthieae Mouly, J.Florence & B.Bremer Augusteae Kainul. & B.Bremer Bertiereae (K.Schum.) Bridson Coffeeae DC. Condamineeae Hook.f. Cremasporeae Benth. Crossopterygeae F.White ex Bridson Gardenieae DC. Greeneeae Mouly, J.Florence & B.Bremer Henriquezieae Bremek. Ixoreae A.Gray Jackieae Korth. Mussaendeae Hook.f. Octotropideae Bedd. Pavetteae Dumort. Posoquerieae Delprete Retiniphylleae Hook.f. Sabiceeae Bremek. Scyphiphoreae Kainul. & B.Bremer Sipaneeae Bremek. Steenisieae Kainul. & B.Bremer Trailliaedoxeae Kainul. & B.Bremer Vanguerieae A.Rich. ex Dumort.

Ixoroideae is an economically valuable subfamily of the Rubiaceae.

Classification

Ixoroideae is a subfamily of the Rubiaceae family. Based on both morphological and molecular characters, Rubiaceae has been divided into three subfamilies - Ixoroideae, Cinchonoideae, and Rubioideae. Ixoroideae and Cinchoinoideae are more closely related.^[1] Members of Ixoroideae are morphologically diverse so no shared derived characters have been established for its classification. Introduction of molecular analyses to systematics dramatically improved tribal classification within the subfamily.^[2] Present tribal classification within this subfamily is mainly supported through molecular analysis of chloroplast DNA. Molecular data revealed presence of 24 tribes within subfamily, including five newly described tribes. 24 tribes include 4000 species.^[3]

Cultivation and use

Ixoroideae consists of 24 tribes that include several economically valuable genera. Well-known genera within the subfamily include Ixora and Gardenia, both popular ornamentals, but economic value is centered on genus Coffea, cultivated for coffee production. Three species are generally used for cultivation - Coffea arabica, Coffea robusta, and Coffea liberica ^[4]

References

↑ Bremer, B., & Eriksson, T. (2009). Time tree of Rubiaceae: phylogeny and dating the family, subfamilies, and tribes. International journal of plant sciences,170(6), 766-793
↑ Andreasen, K, & Bremer, B. (2000). Combined phylogenetic analysis in the Rubiaceae-Ixoroideae: morphology, nuclear and chloroplast DNA data. American Journal of Botany, 87,1731–1748.
↑ Kainulainen, K., Razafimandimbison, S. G., & Bremer, B. (2013). Phylogenetic relationships and new tribal delimitations in subfamily Ixoroideae (Rubiaceae). Botanical Journal of the Linnean Society, 173, 387-406.
↑ Davis, A. P., Govaerts, R., Bridson, D. M., & Stoffelen, P. (2006). An annotated taxonomic conspectus of the genus Coffea (Rubiaceae). Botanical Journal of the Linnean Society, 152(4), 465-512.

Data related to Ixoroideae at Wikispecies