Fig 1.
Distribution of infrageneric groups in Corymbia (adapted from [2] and following the classification of [6]).
Colour coding of groups matches that used in other figures, i.e., taxonomic sections of Corymbia sensu Parra-Osorio et al. [6].
Fig 2.
Photographs of Corymbia and Angophora.
(A) Woodland dominated by Corymbia cliftoniana (a red bloodwood, sect. Septentrionales), near Victoria River, Northern Territory; (B) woodland dominated by Corymbia grandifolia (a ghost gum, sect. Abbreviatae), near Daly Waters, Northern Territory; (C) partially opened flower bud of Corymbia ficifolia (sect. Calophyllae), showing operculate perianth (O) separating from hypanthium; (D) open flower of Angophora floribunda showing perianth composed of five, free sepals (S) and five, free petals (P).
Table 1.
Details of accessions used in this study.
Fig 3.
Phylogeny resulting from cpDNA analyses.
Best-scoring maximum likelihood tree from a RAxML analysis (final ML optimization likelihood of -254343.104231) of a cpDNA dataset (121,016 base pairs, 10,847 distinct alignment patterns, 123 accessions) of eucalypts. Names of Corymbia species are colour-coded by taxonomic section as indicated. Labelling to the right of the tree indicates the outgroup (‘OG’), major groups of Eucalyptus, including subg. Eudesmia (‘Eudesmids’), the symphyomyrt clade (‘Symph’; including subgenera Alveolata, Cruciformes Minutifructus and Syphyomyrtus), and the monocalypt clade (‘Mono’; including subgenera Acerosae, Eucalyptus and Idiogenes), as well as subclades of Corymbia clustering by geographic proximity (A1–A3 and B1–B6) referred to in the text and Fig 4 (for clade A) and Fig 5 (for clade B). Species names of species represented by multiple accessions are followed by collection number for newly generated sequences or GenBank accession number (NC) for data generated for previous studies. Bootstrap support values are shown as percent maximum likelihood/maximum parsimony (MP mapped onto ML tree) with weighted edges indicating 100% support for both ML and MP. Support values <50% are omitted or dashed when the alternate analysis method had ≥50% support.
Fig 4.
Distribution of samples placed in clade A in the cpDNA phylogeny (Fig 3).
Colour coding of groups matches that used in other figures. Accession details are shown for four samples mentioned in the text.
Fig 5.
Distribution of samples placed in clade B in the cpDNA phylogeny (Fig 3).
(A) Samples classified in sect. Septentrionales; (B) samples classified in sect. Abbreviatae, with inset in lower right showing detail for area outlined by dashed rectangle. Details are shown for some clades, species, and accessions mentioned in the text. Colour coding of groups matches that used in other figures.
Fig 6.
Phylogeny resulting from nrDNA analyses.
Best-scoring maximum likelihood tree from a RAxML analysis (final ML optimization likelihood of -4709.258464) of a nrITS dataset (663 base pairs, 337 distinct alignment patterns, 119 accessions) of eucalypts. The outgroup (OG), major groups in Eucalyptus (‘Eudesmids’, ‘Monocalypts’ [Mono], and ‘Symphyomyrts’ [Symph]), subgenera and infrageneric groups of Corymbia are indicated with bars or colouring scheme (see textbox) on the tree. Species names are followed by GenBank accession numbers. Bootstrap support values are shown as percent maximum likelihood/maximum parsimony (MP mapped onto ML tree) with weighted edges indicating 100% support for both ML and MP. Support values <50% are omitted or dashed when the alternate analysis method had ≥50% support. i Identified in GenBank (GB) as Angophora exul K.D.Hill, a name that is synonymised with A. bakeri in the current Australian Plant Census (APC) [1]. ii Identified in GB as Angophora euryphylla (G.J.Leach) L.A.S.Johnson & K.D.Hill, a name that is synonymised with A. costata subsp. euryphylla in the current APC. iii Identified in GB as Corymbia variegata (F.Muell.) K.D.Hill & L.A.S.Johnson, a name that is synonymised with C. citriodora in the current APC. iv Identified in GB as Corymbia dolichocarpa (D.J.Carr & S.G.M.Carr) K.D.Hill & L.A.S.Johnson, a name that is synonymised with C. clarksoniana in the current APC. v Identified in GB as Corymbia dampieri (D.J.Carr & S.G.M.Carr) K.D.Hill & L.A.S.Johnson, a name that is synonymised with C. greeniana in the current APC. vi Identified in GB as Corymbia dimorpha (Brooker & A.R.Bean) K.D.Hill & L.A.S.Johnson, a name that is synonymised with C. peltata in the current APC. vii Identified in GB as Corymbia catenaria K.D.Hill & L.A.S.Johnson, a name that is synonymised with C. watsoniana subsp. capillata in the current APC.
Fig 7.
Summary of hybridisation between infrageneric groups of Corymbia inferred by previous studies [2,73,77].
Arrows connect taxa with inferred hybrids. (A) Inferred intersectional hybrids; (B) interseries hybrids in subg. Corymbia; (C) interseries hybrids in subg. Blakella.