Caesalpinia subgenus Mezoneuron (Leguminosae, Caesalpinioideae) from the tertiary of North America

P. S. Herendeen, D. L. Dilcher

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


Legume fruits from the Eocene of Tennessee and Wyoming and the Miocene of Idaho are described and assigned to Caesalpinia subgenus Mezoneuron (Caesalpinioideae), an extant Paleotropical taxon that does not occur in North or South America today. Morphological and anatomical details of the fruits are used in evaluating their systematic relationships. These fossils suggest that subgenus Mezoneuron was distinct from subgenus Caesalpinia by the Middle Eocene. Further, they document the widespread occurrence of this currently Paleotropical group for at least 30 million years in North America. -from Authors

Original languageEnglish (US)
Pages (from-to)1-12
Number of pages12
JournalAmerican Journal of Botany
Issue number1
StatePublished - Jan 1 1991

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Genetics
  • Plant Science


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