@article {1296, title = {Systematics of Dombeyoideae (Malvaceae) in the Mascarene archipelago (Indian Ocean) inferred from morphology}, journal = {Taxon}, volume = {58}, year = {2009}, pages = {519-531}, abstract = {

The Mascarene Archipelago is characterized by remarkable fauna and flora, mainly due to its high rate of endemism. The Dombeyoideae Beilschm. is one of the most diversified groups of angiosperms in the Mascarenes with 22 species, 21 of which are endemic. We used parsimony analysis of morphological characters to examine the relationships between the endemic Dombeyoideae from the Mascarenes and the members of Dombeyoideae from Africa, Madagascar and Asia. A morphological matrix was created including 36 representative species and 42 characters. Among the most parsimonious trees (MPTs) those with the highest number of secondary homologies were identified. The Dombeyoideae from the Mascarenes are polyphyletic and split into nine clades. Trochetia appears monophyletic and more closely related to Eriolaena and Helmiopsis than to Dombeya. All Dombeya taxa are included in a clade together with Ruizia and Astiria, which makes Dombeya paraphyletic. In terms of breeding systems the Malagasy Dombeyoideae are hermaphroditic, whereas those of the Mascarenes are considered dioecious. The polyphyly of the Mascarene Dombeyoideae suggests that dioecy has been acquired several times. At least five colonization events from Madagascar to the Mascarene archipelago are inferred. The evolutionary history of two lineages of Mascarene Domeyoideae seems to be related to adaption to xeric habitats.

}, keywords = {Dioecy, Dombeyoideae, MaHo Method, Mascarene Archipelago, Phylogeny, Systematics}, url = {http://www.jstor.org/discover/10.2307/27756889?uid=3738912\&uid=367858501\&uid=2129\&uid=2\&uid=70\&uid=3\&uid=60\&sid=21102886014073}, author = {Le P{\'e}chon, Timoth{\'e}e and Cao, T and Dubuisson, Jean-Yves and Gigord, Luc D B} } @inbook {1284, title = {Sterculiaceae}, booktitle = {Flore des Mascareignes, 51. Malvac{\'e}es {\`a} 62. Oxalidac{\'e}es}, volume = {53}, year = {1987}, pages = {1{\textendash}50}, edition = {MSIRI {\textendash} ORSTOM {\textendash} Royal Botanical Gardens}, address = {Port-Louis, Paris, London}, keywords = {Astyria, Dombeya, Dombeyoideae, Ruizia, Trochetia}, issn = {2-7099-1402-6}, author = {Friedmann, Francis} } @article {1283, title = {Dombeya formosa (Malvaceae s.l.): A New Species Endemic to La R{\'e}union (Indian Ocean) Based on Morphological and Molecular Evidence}, journal = {Systematic Botany}, volume = {38}, year = {2013}, pages = {424-433}, abstract = {

Dombeya formosa (Malvaceae s.l. or Dombeyaceae), a new species endemic to La R\éunion, is described and illustrated. The species is distinguishable by its ovate leaves with round or slightly cordate bases, round to lightly acute apices and glabrescent abaxial surfaces, subulate and persistent stipules, umbellate inflorescences, and acute apices of floral bracts. Dombeya formosa is morphologically close to Dombeya punctata Cav. but differs from it in having ovate leaves and acute apices on floral bracts. Dombeya formosa is also morphologically similar to D. ficulnea Baill. but can be distinguished from it by its persistent and subulate stipules as well as the glabrescent adaxial surface of its leaves. Our study, focusing on 16 quantitative floral characters, demonstrates that there is a clear morphological distinction between D. formosa, D. punctata, and D. ficulnea. In comparison to the other two species, Dombeya formosa possesses smaller flowers and additionally shows cryptic dioecy along with flower-size dimorphism between sexes. Amongst the Mascarene Dombeyoideae, it is the only species distributed up to an altitude of 2,100 m. The phylogenetic position of Dombeya formosa is consistent with the morphological features and locates the species within the clade endemic to La R\éunion characterized by umbellate inflorescences.

}, keywords = {Dioecy, Dombeyaceae, Dombeyoideae, Phylogeny, taxonomy}, isbn = {1548-2324}, issn = {0363-6445}, doi = {http://dx.doi.org/10.1600/036364413X666732}, url = {http://www.bioone.org/doi/abs/10.1600/036364413X666732}, author = {Le P{\'e}chon, Timoth{\'e}e and Paus{\'e}, Jean-Bernard and Dubuisson, Jean-Yves and Gigord, Luc D B and Haevermans, Agathe and Haevermans, Thomas and Humeau, Laurence} }