Consulta: creatorFacets:"Bouman, F."
Registros recuperados: 3
Data/hora: 10/06/2024 18:15:32

A comparison of the structure of ovules and seeds in Stemona (Stemonaceae) and Pentastemona (Pentastemonaceae)
Provedor de dados: 16
Autores: Bouman, F.; Devente, N.
Stemona and Pentastemona differ clearly in the size and structure of their ovules and seeds. Especially the development, shape, and cell wall thickenings of the endotestal cells, and by consequence the origin of the seed ridges, show marked differences. The embryological and seed anatomical characters support the proposal to give Pentastemona a family status.
Tipo: Article / Letter to the editor
Ano: 1992
URL: http://www.repository.naturalis.nl/record/524654

Evolution and phylogenetic importance of endocarp and seed characters in Viburnum (Adoxaceae)
Provedor de dados: 16
Autores: Jacobs, B.; Donoghue, M.J.; Bouman, F.; Huysmans, S.; Smets, E.F.
Recent phylogenetic analyses based on molecular markers have resulted in a solid phylogeny of Viburnum with 12 well-defined clades. This has allowed us to focus on character evolution, endocarp and seed characters in particular. Members of Viburnum bear drupes that differ considerably between clades. Characters such as pyrene shape and grooving, number of fibrous layers, seed coat anatomy, and seed rumination are phylogenetically highly valuable. Our results largely agree with the results based on molecular data and provide several additional insights. The position of V. clemensae as sister to the rest of Viburnum is supported by several characters. The early diversification of V. clemensae might explain its highly derived features. Furthermore, our...
Tipo: Article / Letter to the editor
Palavras-chave: Viburnum Adoxaceae endocarp seed evolution phylogeny 42.43; 42.58.
Ano: 2008
URL: http://www.repository.naturalis.nl/record/449561

Note on the early development of the integument in some Juglandaceae together with some general questions on the structure of Angiosperm ovules
Provedor de dados: 16
Autores: Heel, W.A. van; Bouman, F.
Recently a review on the Angiosperm ovule has been published by the well-known Indian botanist V. Puri (1970). In this review the author stressed the differences between Angiospermous and Gymnospermous ovules, and he refused to accept their comparability or common descent. In this respect Puri comes close to Eames (1961). Both authors tend to regard the ovules as complex emergences. Apart from the main theme, there is a striking passage in this review dealing with the Hugo de Vries Laboratory at Amsterdam. According to Puri in that laboratory facts are sacrificed for hypotheses (p. 10). In the following we would like to start with the facts concerned and present them in a more convincing way, and then ask some simple questions on the structure of the...
Tipo: Article / Letter to the editor
Ano: 1972
URL: http://www.repository.naturalis.nl/record/525600