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Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Asterids
Cladus: Lamiids
Ordo: Gentianales

Familia: Apocynaceae
Subfamilia: Asclepiadoideae
Tribus: Asclepiadeae
Subtribus: Oxypetalinae
Genera: AraujiaFunastrumKerberaOxypetalumPhilibertiaSchistonemaTweedia
Araujia - Corollonema - Diplolepis - Melinia - Mitostigma - Morrenia - Oxypetalum - Rojasia - Schistogyne - Schistonema - Stenomeria - Tweedia

Name

Oxypetalinae E.Fourn. in Mart. (ed.), Fl. Bras. 6(4): 193. (1885)

Type genus: Oxypetalum R. Br., Asclepiadeae 30. (1810) nom. cons.

Note: Endress et al. (2014) placed both Morrenia Lindl., Edwards's Bot. Reg. 24, Misc.: 71 (1838) and Widgrenia Malme, Kongl. Svenska Vetenskapsakad. Handl. II, 34(7): 69, t. 2, f. 4 (1900) in this subtribe, but they have now been placed in synonymy (Liede-Schumann & Meve, 2015 & Rapini et al., 2011). The monotypic genera Kerbera E.Fourn., Fl. Bras. (Martius) 6(4): 290. (1885) and Schistonema Schltr., Bot. Jahrb. Syst. 37(5): 604. (1906) are tentatively placed here by Rapini et al. (2011) pending further analysis, but are both missing from Endress et al. (2014).
References

Fournier, E.P.N. in Martius, C.F.P. von (ed.) 1885. Flora Brasiliensis 6(4): 193.
Endress, M.E., Liede-Schumann, S. & Meve, U. 2014. An updated classification for Apocynaceae. Phytotaxa 159(3): 175–194. DOI: 10.11646/phytotaxa.159.3.2 ResearchGate Reference page.
Liede-Schumann, S., Rapini, A., Goyder, D.J. & Chase, M.W. 2005. Phylogenetics of the new world subtribes of Asclepiadeae (Apocynaceae - Asclepiadoideae): Metastelmatinae, Oxypetalinae, and Gonolobinae. Systematic Botany 30(1): 184–195. DOI: 10.1600/0363644053661832 ResearchGate Reference page.
Liede-Schumann, S. & Meve, U. 2015. Synonymy of three South American genera in Apocynaceae, and new combinations in Oxypetalum and Tassadia. Phytotaxa 202(1): 35–44. DOI: 10.11646/phytotaxa.202.1.4 Reference page.
Rapini, A., Pereira, J.F. & Goyder, D.J. 2011. Towards a stable generic circumscription in Oxypetalinae (Apocynaceae). Phytotaxa 26(1): 9–16. DOI: 10.11646/phytotaxa.26.1.2 PDF Reference page.

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