A new infrageneric classification and phylogenetic trends in the genusRhododendron (Ericaceae)

  title={A new infrageneric classification and phylogenetic trends in the genusRhododendron (Ericaceae)},
  author={Wolfgang Spethmann},
  journal={Plant Systematics and Evolution},
  • W. Spethmann
  • Published 1 March 1987
  • Biology
  • Plant Systematics and Evolution
Recent studies have improved the infrageneric classification ofRhododendron, including my own investigations on flavonoids and anthocyanins as chemosystematic markers. From a synoptical comparison of morphological, anatomical and phytochemical characters a new system for the genus is proposed. Phylogenetic character progressions and relationships among subgenera, sections and subsections are discussed and illustrated. Key positions for subg.Candidastrum between chori subgenerumRhododendron… 

Diplarche and Menziesia transferred to Rhododendron (Ericaceae)

The genera Diplarche and Menziesia have been shown to be nested in Rhododendron based upon cladistic analyses of DNA data and the species of these two genera are formally transferred to Rhododendedron.

Leaf epidermal features of Rhododendron (Ericaceae)from China and their systematic significance

The results support the conclusion inferred from molecular systematic studies that subgen.

Pollen morphology of Rhododendron subgen. Tsutsusi and its systematic implications

Pollen grains are revealed to be spheroidal and tetrahedral with tricolporate apertures, and the exine sculptures are more or less compactly granulated.

Incongruent phylogenies and their implications for the study of diversification, taxonomy, and genome size evolution of Rhododendron.

A broad coverage of representative species is provided to resolve Rhododendron infrageneric phylogeny and suggest stronger support for larger subgenera, but a number of species cannot be confidently assigned to these clades due to incongruency.

Inheritance of Corolla Size, Number of Stamens and Percentage of Plants with Petaloid Stamens in Evergreen Azaleas (Rhododendron Subsect. obtusa)

The positive correlation between the parental values and the GCA estimates for flower size and number of stamens indicates that the expression of these characters is mainly determined by additive gene action.

Antioxidant phenolic compounds from the leaves of Erica Arborea (Ericaceae)

Reversed-phase HPLC analyses of the methanol extract of the leaves of Erica arborea afforded a novel phenylpropanoid glucoside, named ericarborin, together with five flavonoids, which were determined by direct comparison of their spectroscopic data with respective literature data.

A Taxonomic Revision Of Rhododendron subg. Tsutsusi sect. Brachycalyx (Ericaceae)1

A taxonomic revision of section Brachycalyx is proposed and eight species with one subspecies are recognized, newly recognized at the new rank of subspecies as R. dilatatum subsp.



Florae Malesianae Precursores XXXIX. Supplementary notes towards the knowledge of the Ericaceae in Malesia II

The species numbers refer to those given in the author’s previous revisions, cited at the genus. An a, b, or c number indicates the relationship of a new species.

The altitudinal and geographical distributions of flower types in Rhododendron section Vireya, especially in the Papuasian species, and their significance

It is shown that in west Malesia species with flower colour other than red, not or slightly zygomorphic flowers and relatively longer corolla lobes are commoner than within Papuasia; it appears that section Viveya is, florally at least, most specialized in this latter area.

Synoptical Flora of North America

The present volume covers the central third of the complete undertaking as planned, and at the beginning the Polypetalous Dicotyledons are still left as they stood in 1840, except for the most useful bibliographical index brought up to date.

Evolution and classification of R h o d o d e n d r o n . - The R h o d o d e n d r o n

  • 1946

The classification of R h o d o d e n d r o n . - The R h o d o d e n d r o n and Camel l i a Yearbook, Roy. Horticult

  • Notes Roy. Bot. Gard. Edinburgh 34,
  • 1971

Diverse Nodal Types in Rhododendron