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Gunnerales are sister to other core eudicots: implications for the evolution of pentamery.
Parsimony reconstructions of perianth merosity demonstrate lability among early-diverging eudicots and further indicate that a dimerous peranth could be the immediate precursor to the pentamerous condition characteristic of core eudicot. Expand
Evolution of Floral Structures in Basal Angiosperms
The reconstructed patterns of evolution in the flowers of basal angiosperms indicate that the patterns of perianth and stamen phyllotaxis are usually, but not always, closely associated, and that floral characters are generally consistent with phylogenetic relationships inferred from molecular data. Expand
Anatomical features associated with water transport in imperforate tracheary elements of vessel-bearing angiosperms.
The structure and density of pits between ITEs represent the main anatomical characters determining water transport, and it is suggested that the term tracheids should strictly be used for conductive ITEs, while fibre-tracheids and libriform fibres are non-conductive. Expand
Establishment of zygomorphy on an ontogenic spiral and evolution of perianth in the tribe Delphinieae (Ranunculaceae).
It is suggested that shifts in expression of genes controlling the merism, as well as floral symmetry and organ identity, have played a critical role in the evolution of zygomorphy in Delphinieae, while the presence of pollinators able to exploit the peculiar morphology of the flower has been a key factor for the maintenance and diversification of this trait. Expand
Homology and Evolution of Petals in the Core Eudicots
Seventeen morphological characters are described and plotted on a phylogeny of the eudicots. The distribution of perianth characters demonstrates that the currently held view that petals originatedExpand
Floral development of petaloid Alismatales as an insight into the origin of the trimerous Bauplan in monocot flowers
The results indicate that the origin of the floral Bauplan, at least in petaloid Alismatales, is closely linked to the position of stamen pairs and the rate of petal development. Expand
Asymmetric morphogenetic cues along the transverse plane: shift from disymmetry to zygomorphy in the flower of Fumarioideae.
Genes of PapCRC and PapCYL families could be direct or indirect targets of the initial transversally asymmetric cue responsible for the shift from disymmetry to zygomorphy in Fumarioideae. Expand
Are petals sterile stamens or bracts? The origin and evolution of petals in the core eudicots.
The origin and evolution of petals appears to be as complex on a molecular basis as it is from a morphological point of view. Expand
Morphology and anatomy of the flower of Meliosma (Sabiaceae): implications for pollination biology
The structure and anatomy of mature flowers of four species of Meliosma is investigated using scanning electron and light microscopy and the significance of Sabiaceae as an isolated clade is highlighted, although some features point to a link with Menispermaceae. Expand
Evolution of Floral Characters in Gunnera (Gunneraceae)
Character-state reconstruction and morphological evidence suggest that flowers in Gunneraceae were bisexual in origin with a reduction leading to simple unisexual flowers. Expand