Evolution of developmental potential and the multiple independent origins of leaves in Paleozoic vascular plants

  title={Evolution of developmental potential and the multiple independent origins of leaves in Paleozoic vascular plants},
  author={C. Kevin Boyce and Andrew H. Knoll},
  • C. BoyceA. Knoll
  • Published in Paleobiology 1 December 2002
  • Environmental Science, Geography
Abstract Four vascular plant lineages, the ferns, sphenopsids, progymnosperms, and seed plants, evolved laminated leaves in the Paleozoic. A principal coordinate analysis of 641 leaf species from North American and European floras ranging in age from Middle Devonian through the end of the Permian shows that the clades followed parallel trajectories of evolution: each clade exhibits rapid radiation of leaf morphologies from simple (and similar) forms in the Late Devonian/Early Carboniferous to… 

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