Only nursing plants?

Inaugural lecture by Prof.dr. Paul J.A. Keßler on the acceptance of his position as professor of Botanical Gardens and Botany of South East Asia at the Universiteit Leiden on behalf of the Leids Universiteits Fonds on Friday April 21, 2017Inaugural lecture by Prof.dr. Paul J.A. Keßler on the acceptance of his position as professor of Botanical Gardens and Botany of South East Asia at the Universiteit Leiden on behalf of the Leids Universiteits Fonds on Friday April 21, 2017

Alleen maar plantjes verzorgen?

Prof.dr. Paul J.A. Keßler bij de aanvaarding van het ambt van bijzonder hoogleraar op het gebied van Botanische Tuinen en Botanie van Zuidoost-Azië aan de Universiteit Leiden vanwege het Leids Universiteits Fonds op vrijdag 21 april 2017Prof.dr. Paul J.A. Keßler bij de aanvaarding van het ambt van bijzonder hoogleraar op het gebied van Botanische Tuinen en Botanie van Zuidoost-Azië aan de Universiteit Leiden vanwege het Leids Universiteits Fonds op vrijdag 21 april 2017

Apakah hanya Pemeliharaan Tanaman? Only nursing plants?

Kuliah Inaugurasi Prof. Dr. Paul J.A. Keßler dalam pengukuhannya sebagai Guru Besar di bidang Botanical Garden dan Ilmu Botani di Asia Tenggara di Universitas Leiden disponsori oleh Leids Universiteits Fonds Jumat, 21 April 2017-16.15 hKuliah Inaugurasi Prof. Dr. Paul J.A. Keßler dalam pengukuhannya sebagai Guru Besar di bidang Botanical Garden dan Ilmu Botani di Asia Tenggara di Universitas Leiden disponsori oleh Leids Universiteits Fonds Jumat, 21 April 2017-16.15

Subgeneric delimitation of the plant genus Phyllanthus (Phyllanthaceae)

Over two centuries of taxonomic studies on the species rich genus Phyllanthus have culminated in a broadand complicated classification with many subgenera and (sub)sections. Past taxonomic work has only focused on local revisions, mostly because of the size of the genus. In this study we aim to summarize most of the taxonomic work in a list containing the infrageneric delimitations of Phyllanthus. This work will serve as a reference, placing most currently recognized species in subgenera and if possible, in sections for further study. Here we recognize 880 species of Phyllanthus, classified in 18 subgenera, 70 sections and 14 subsections. A few taxonomic changes are necessary to reconcile published phylogenetic data with the current classification. Subsections Callidisci and Odontadenii are raised to sectional rank, while section Eleutherogynium and section Physoglochidion are reduced to subsections and P. oxycarpus is transferred to the genus Glochidion. A provisional key for the subgeneric classification of Phyllanthus is provided.Naturali

Molecular phylogenetics of Phyllanthus sensu lato (Phyllanthaceae): Towards coherent monophyletic taxa

The genus Phyllanthus is paraphyletic as currently circumscribed, with the genera Breynia, Glochidion and Synostemon nested within it. A phylogeny based on nuclear (ITS, PHYC) and chloroplast (matK, accD-psaI, trnS-trnG) markers is presented, including 18/18 subgenera and 53/70 sections. Differences in habit, branching type, floral and fruit characters are discussed, and we find indications for shifts in pollination and dispersal strategies possibly underlying the convergent evolution of these characters in multiple clades. Several taxonomic issues were found in the subgeneric classification of Phyllanthus that will require new transfers and rank changes. Phyllanthus subg. Anesonemoides, subg. Conami, subg. Emblica, subg. Gomphidium, subg. Kirganelia and subg. Phyllanthus are polyphyletic, and several sections appear to be paraphyletic (e.g., P. sect. Anisonema, sect. Emblicastrum, sect. Pseudoactephila, sect. Swartziani, and sect. Xylophylla); P. subg. Phyllanthodendron is furthermore paraphyletic with the genus Glochidion nested within. To create a classification of tribe Phyllantheae that comprises exclusively monophyletic taxa, it is necessary to treat several clades at the same taxonomic rank as the genera Breynia, Glochidion and Synostemon. Since combining all genera would lead to one giant heterogeneous genus that is difficult to define, we recommend dividing Phyllanthus into several monophyletic genera, which have previously been recognized and often possess diagnostic (combinations of) morphological characters. This new classification is forthcoming.Plant sciencesNaturali

A revised phylogenetic classification of tribe Phyllantheae (Phyllanthaceae)

The majority of tribe Phyllantheae (Phyllanthaceae) is currently placed in the paraphyletic genus Phyllanthus and discussions have persisted on how to resolve this issue. Here, we split Phyllanthus into ten monophyletic genera, which are all reinstatements of former genera, but with changes made to the circumscription and constituent species of each group. The genera Breynia, Glochidion and Synostemon were recently found to be nested within Phyllanthus and discussions ensued whether or not to subsume everything into Phyllanthus s.l. Instead of combining all these genera, we here implement the solution of splitting Phyllanthus into strictly monophyletic genera to ensure that the classification is consistent with the latest phylogenetic results. The new classification is based on a phylogenetic framework combined with differences in habit, branching type, floral, fruit and pollen morphology. With this new division of the genus Phyllanthus, tribe Phyllantheae will consist of the following 18 genera: Breynia, Cathetus, Cicca, Dendrophyllanthus, Emblica, Flueggea, Glochidion, Heterosavia, Kirganelia, Lingelsheimia, Lysiandra, Margaritaria, Moeroris, Nellica, Nymphanthus, Phyllanthus, Plagiocladus and Synostemon. As a result of the reinstated genera, five new names for illegitimate combinations or previous overlooked nomenclatural anomalies and 645 new combinations are proposed. Several keys are provided to distinguish the reinstated genera. Full species lists are given for the reinstated genera treated here except for Breynia, Synostemon and Glochidion.Plant sciencesNaturali

Nur ein Park?

Vortrag gehalten von Prof. Dr. rer. nat. Paul J.A. Keßler anlässlich der Amtseinführung als außerordentlicher Professor des Lehrstuhles Botanische Gärten und Botanik von Südost Asien an der Universität Leiden gefördert durch die Stiftung Leids Universiteits Fonds am Freitag 21. April 2017</p

Apakah hanya Pemeliharaan Tanaman? Only nursing plants?

Kuliah Inaugurasi Prof. Dr. Paul J.A. Keßler dalam pengukuhannya sebagai Guru Besar di bidang Botanical Garden dan Ilmu Botani di Asia Tenggara di Universitas Leiden disponsori oleh Leids Universiteits Fonds Jumat, 21 April 2017-16.15 h</p

Only nursing plants?

Inaugural lecture by Prof.dr. Paul J.A. Keßler on the acceptance of his position as professor of Botanical Gardens and Botany of South East Asia at the Universiteit Leiden on behalf of the Leids Universiteits Fonds on Friday April 21, 2017</p

Alleen maar plantjes verzorgen?

Prof.dr. Paul J.A. Keßler bij de aanvaarding van het ambt van bijzonder hoogleraar op het gebied van Botanische Tuinen en Botanie van Zuidoost-Azië aan de Universiteit Leiden vanwege het Leids Universiteits Fonds op vrijdag 21 april 2017</p