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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
Genus: Tweedia
Species: T. andina – T. aucaensis – T. birostrata – T. brunonis – T. echegarayi – T. stipitata
Name

Tweedia Hook. & Arn., J. Bot. (Hooker) 1: 291. (1834)

Type species: Tweedia brunonis Hook. & Arn., J. Bot. (Hooker) 1: 292 (1834)

Synonyms

Heterotypic
Turrigera Decne. in A.P.de Candolle, Prodr. 8: 590 (1844)
Type species: Turrigera inconspicua Decne in A.P.de Candolle, Prodr. 8: 590 (1844)

References

Hooker, W.J. & Arnott, G.A.W. 1834. Journal of Botany, (Being a Second Series of the Botanical Miscellany), Containing Figures and Descriptions. London 1: 291.
Calviño, C.I., Fernandez, M. & Ezcurra, C. 2014. Is the southern South American genus Tweedia (Apocynaceae: Asclepiadoideae) monophyletic? Molecular phylogenies, distribution and taxonomy. Taxon 63(6): 1265-1274. DOI: 10.12705/636.35 Full text PDF from ResearchGate Reference page.
Govaerts, R. et al. 2017. Tweedia in World Checklist of Selected Plant Families. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the internet. Accessed: 2017 Nov. 24. Reference page.
International Plant Names Index. 2017. Tweedia. Published online. Accessed: Nov. 24 2017.
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.
Tropicos.org 2017. Tweedia. Missouri Botanical Garden. Published on the internet. Accessed: 2017 Nov. 24.

Tweedia is a genus of flowering plants in the family Apocynaceae, first described as a genus in 1835. The genus is native to South America.[2] An ornamental plant, Oxypetalum coeruleum, formerly included in this genus is commonly referred to as "tweedia".[3][4][5][6][7]

Species[8]

Tweedia andina (Phil.) G.H.Rua - Chile
Tweedia aucaensis G.H. Rua - Argentina
Tweedia australis (Malme) C. Ezcurra - Argentina
Tweedia birostrata (Hook. & Arn.) Hook. & Arn. - Chile
Tweedia brunonis Hook. & Arn. - Argentina, Bolivia, Paraguay
Tweedia echegarayi (Hieron.) Malme - Argentina
Tweedia solanoides (Hook. & Arn.) Chittenden - Argentina, Brazil, Paraguay, Uruguay

formerly included[8]

Tweedia coerulea, syn of Oxypetalum coeruleum
Tweedia floribunda, syn of Oxypetalum solanoides
Tweedia macrolepis, syn of Oxypetalum macrolepis
Tweedia versicolor , syn of Oxypetalum coeruleum

References

lectotype designated by Rua, G. H. 1989. Revisión taxonómica del género Tweedia (Asclepiadaceae). Parodiana 5(2): 382.
Liede-Schumann, Sigrid; Meve, Ulrich (2006). "The Genera of Asclepiadoideae, Secamonoideae and Periplocoideae (Apocynaceae)". Retrieved 19 November 2013.
Fabris, H. A. 1965. Primulaceae, Myrsinaceae, Ericaceae, Plumbaginaceae, Sapotaceae, Symplocaceae, Oleaceae, Loganiaceae, Gentianaceae, Menyanthaceae, Apocynaceae, Asclepiadaceae, Convolvulaceae, Bignoniaceae, Campanulaceae in A. Cabrera. 4(5): 6–12; 298–302. In A. L. Cabrera (ed.) Flora de la Provincia de Buenos Aires. Instituto Nacional de Tecnología Agropecuaria, Buenos Aires.
Meyer, T. & N.M. Bacigalupo. 1979. Asclepiadaceae. 5: 103–147. In A. E. Burkart (ed.) Flora Ilustrada de Entre Ríos (Argentina). Instituto Nacional de Tecnología Agropecuaria, Buenos Aires
Forzza, R. C. 2010. Lista de espécies Flora do Brasil http://floradobrasil.jbrj.gov.br/2010. Jardim Botânico do Rio de Janeiro, Rio de Janeiro
Zuloaga, F. O., O. N. Morrone, M. J. Belgrano, C. Marticorena & E. Marchesi. (eds.) 2008. Catálogo de las plantas vasculares del Cono Sur. Monographs in systematic botany from the Missouri Botanical Garden 107(1–3): i–xcvi, 1–3348.
Marticorena, C. & M. Quezada. 1985. Catálogo de la Flora Vascular de Chile. Gayana, Botánica 42: 1–157.
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