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

  title={A new infrageneric classification and phylogenetic trends in the genusRhododendron (Ericaceae)},
  author={W. Spethmann},
  journal={Plant Systematics and Evolution},
  • W. Spethmann
  • Published 2004
  • 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… Expand

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  • 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
A revision of Rhododendron
  • Subg. Hymenanthes. - Notes Roy. Bot. Gard. Edinburgh
  • 1982
1980: R h o d o d e n d r o n Hairs and Taxonomy
  • 1980
A revision of R h o d o d e n d r o n . 1. Subgenus R h o d o d e n d r o n sections R h o
  • 1980
A preliminary synopsis of the genus R h o d o d e n d r o n : II
  • 1979