Phylogenetic framework for Trema (Celtidaceae)

C. Yesson, S. J. Russell, T. Parrish, James W Dalling, N. C. Garwood

Research output: Contribution to journalArticlepeer-review


We used ITS and trnL sequence data, analyzed separately and combined by MP, to explore species relationships and concepts in Trema (Celtidaceae), a pantropical genus of pioneer trees. Whether Trema is monophyletic or includes Parasponia is still unresolved. Three clades within Trema received moderate to high support, one from the New World and two from the Old World, but their relationships were not resolved. In the New World, specimens of T. micrantha formed two groups consistent with endocarp morphology. Group I, with smaller brown endocarps, is a highly supported clade sister to T. lamarckiana. Group II, with larger black endocarps, is poorly resolved with several subclades, including the highly supported T. integerrima clade. Both Old World clades contain Asian and African species, with three or more species in each region. Trema orientalis is not monophyletic: specimens from Africa formed a highly supported clade sister to T. africana, while those from Asia were sister to T. aspera from Australia.

Original languageEnglish (US)
Pages (from-to)85-109
Number of pages25
JournalPlant Systematics and Evolution
Issue number1-4
StatePublished - Oct 2004


  • Celtidaceae
  • ITS
  • Molecular phylogeny
  • Parasponia
  • Trema
  • Tropical pioneer trees
  • trnL

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Plant Science


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