Byttnerioideae is a subfamily of the flowering plant family Malvaceae.
Byttneria is the type genus for the subfamily. Byttneria is now treated as synonym of Ayenia.Dorr, L.J. 2023. New combinations in Ayenia (Malvaceae, Byttnerioideae) for the flora of Ecuador. Phytoneuron 2023-04: 1– 5. Published 17 February 2023. ISSN 2153-733X
Tribes and genera Four tribes are recognised by the Germplasm Resources Information Network:
Byttnerieae
Abroma Jacq. Ayenia L. Byttneria Loefl. (synonym of Ayenia) Kleinhovia L. Leptonychia Turcz. Megatritheca Cristóbal Rayleya Cristóbal (synonym of Ayenia) Scaphopetalum Mast.
Hermannieae
Dicarpidium F.Muell. Gilesia F.Muell. Hermannia L. Melochia L. Waltheria L.
Lasiopetaleae
Commersonia J.R.Forst. & G.Forst. Guichenotia J.Gay Hannafordia F.Muell. Keraudrenia J.Gay (synonym of Seringia) Lasiopetalum Sm. Lysiosepalum F.Muell. Maxwellia Baill. Rulingia R.Br. Seringia J.Gay Thomasia J.Gay
Theobromateae
Glossostemon Desf. Guazuma Mill. Herrania Goudot Theobroma L.
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