Ontogeny and Diversity in Staminate Flowers of Nothofagus (Nothofagaceae)

@article{Rozefelds1998OntogenyAD,
  title={Ontogeny and Diversity in Staminate Flowers of Nothofagus (Nothofagaceae)},
  author={Andrew C. Rozefelds and Andrew N. Drinnan},
  journal={International Journal of Plant Sciences},
  year={1998},
  volume={159},
  pages={906 - 922}
}
In Nothofagus, the staminate inflorescences occur in the proximal leaf axils of proleptic seasonal growth units. The subgenera Brassospora, Fuscospora, and Nothofagus have either dichasia of three flowers or a single flower; subgenus Lophozonia has only solitary flowers. Flowers of Lophozonia differ significantly from those of the other subgenera. They have substantially more perianth lobes and stamens, stamen initiation follows a pseudocentrifugal pattern, and the floral meristem is distinctly… 
Ontogeny of pistillate flowers and inflorescences in Nothofagus subgenus Lophozonia (Nothofagaceae)
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Comparative studies demonstrate that the dorsal rows of appendages on the cupule valves have a similar arrangement, and each row exhibits the same temporal pattern of development, suggesting that the Cupule valves in all species have a modular construction and consist of rows of homologous appendages.
Fossil floral and fruit evidence for the evolution of unusual developmental characters in Fagales
TLDR
Comparison of ontogenetic changes between the fossil and related fagalean taxa suggests independent stepwise changes in development in which some characters of the modern clades were in place at ∼ 75 Myr and others evolved more recently.
Revised circumscription of Nothofagus and recognition of the segregate genera Fuscospora , Lophozonia , and Trisyngyne (Nothofagaceae)
TLDR
A new phylogenetic analysis of morphological characters is presented and it is argued that these morphological and molecular differences are sufficient for the four clades of Nothofagaceae to be recognised at the primary rank of genus, and that this classification will be more informative and efficient than the currently circumscribed Noth ofagus with four subgenera.
Periods of Organogenesis in Shoots of Nothofagus dombeyi (Mirb.) Oersted (Nothofagaceae)
TLDR
The organogenetic event which initiated the neoformed organs continued until early autumn, giving rise to the following year’s preformation, and the naked terminal bud of Nothofagus spp.
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The phylogenetic placements of leaf fossils of Nothofagus (Nothofagaceae) were determined using parsimony analyses of molecular and morphological data for extant species combined with morphological
An unusual multicarpellary condition in Crotalaria verrucosa L. (Fabaceae) from Gujarat (India)
TLDR
A multicarpellary ovary is a primitive feature among angiosperms and is rarely observed in the family Fabaceae, but the ovary of Crotalaria verrucosa deviates from this blueprint in that it has bicarpellaries and tricarpelary apocarpous ovaries.
Nothofagus Biogeography Revisited with Special Emphasis on the Enigmatic Distribution of Subgenus Brassospora in New Caledonia
TLDR
Considering all parameters, the occurrence of Brassospora in New Caledonia is most parsimoniously explained as a single colonization event from New Zealand where the subgenus subsequently went extinct in the Pliocene.
Nothofagus Biogeography Revisited with Special Emphasis on the Enigmatic Distribution of Subgenus Brassospora in New Caledonia
TLDR
Considering all parameters, the occurrence of Brassospora in New Caledonia is most parsimoniously explained as a single colonization event from New Zealand where the subgenus subsequently went extinct in the Pliocene.
A hypothesis on cupule evolution and the evidence from molecular phylogenies and fossils
TLDR
The consensus from four molecular phylogenetic hypotheses along with the age of fossil cupules that are similar to extant Fagaceae taxa indicate that the cupule evolved in multi-directions, and that the small triangular, narrow winged fruits surrounded by a dehiscent cupule was plesiomorphy, and the bigger roundish fruit surrounded by an indehiscent Cupule was apomorphy.
Phylogenetic relationships and time-calibration of the South American fossils and extant species of southern beeches (Nothofagus)
Fil: Vento, Barbara. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Mendoza. Instituto Argentino de Nivologia, Glaciologia y Ciencias Ambientales.
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