Biology:Dombeyoideae

Short description: Subfamily of flowering plants

Dombeyoideae
Flowering branch of Ruizia cordata
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Malvales
Family:	Malvaceae
Subfamily:	Dombeyoideae Beilschm.
Genera
About 20, see text
Synonyms
Corchoropsideae Dombeyeae Kunth ex DC. Eriochlaeneae (orth. var.) Eriolaeneae Eriolaenoideae (Arn.) Lindley Excentrodendroideae Helmiopsideae

Dombeyoideae is a widely distributed subfamily of the Malvaceae, as proposed by the APG. Most of the plants placed here were once assembled with more or less related genera in the paraphyletic Sterculiaceae; a lesser number were placed in the Tiliaceae which were also not monophyletic.

The Dombeyoideae were originally described by Carl Beilschmied in 1833. In the present delimitation, they contain roughly 20 genera with about 380 species, some 60% of which are in Dombeya (one of the most speciose genera of Malvaceae). They grow in the Old World tropics, especially Madagascar and the Mascarenes where about two-thirds of the species occur. In the Mascarenes, they are among the most diverse angiosperm groups, analogous to such (unrelated) plants as the aeoniums on the Canary Islands or the silversword alliance of the Hawaiian Islands.

The subfamily is sometimes further divided into tribes (Corchoropsideae, Dombeyeae, Eriolaeneae, Helmiopsideae), but this is more often considered unwarranted. Probably, most or all of these supposed subdivisions are not monophyletic and thus technically synonyms of the whole subfamily.

Several species are noted for their beautiful timber which is used for inlays and other artwork. Others – namely from the type genus Dombeya – are popular ornamental plants due to their beautiful flowers. Trochetia is famous for the peculiar coloured nectar it can produce, and it often is pollinated by Phelsuma geckos.

Selected genera

Genera of Dombeyoideae include:

• Astiria Lindl. – synonym of Ruizia
• Burretiodendron – formerly in Tiliaceae
• Cheirolaena Benth
• Corchoropsis Siebold & Zucc. – formerly in Tiliaceae
• Dombeya Cav.
• Eriolaena DC.
• Harmsia K.Schum.
• Helmiopsiella Arenes – synonym of Eriolaena
• Helmiopsis H.Perrier – synonym of Eriolaena
• Melhania Forssk.
• Nesogordonia Baill.
• Paradombeya Stapf – synonym of Corchoropsis
• Paramelhania Arenes
• Pentapetes L.
• Pterospermum Schreb.
• Ruizia Cav.
• Schoutenia Korth. – formerly in Tiliaceae
• Sicrea Hallier f. – synonym of Schoutenia
• Trochetia DC. – synonym of Ruizia
• Trochetiopsis Marais

References

• Cao, Nathanaël; Le Pechon, Timothée & Zaragüeta-Bagils, René (2006): Does minimizing homoplasy really maximize homology? MaHo: A method for evaluating homology among most parsimonious trees. C. R. Palevol 7(1): 17–26. doi:10.1016/j.crpv.2007.12.008 (HTML abstract)
• Hinsley, Stewart R. (2007a): Synonymy of Malvaceae. Retrieved 2008-JUN-25.
• Hinsley, Stewart R. (2007b): Malvaceae Info: Index to Genera. Retrieved 2008-JUN-25.

Wikidata ☰ Q645194 entry