A reassessment of the leafy shoots of Pennsylvanian-age arborescent lycopods

Barry A. Thomas*, Christopher J. Cleal

*Corresponding author for this work

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Abstract

The known fossil-species of upper Carboniferous (Pennsylvanian) arborescent lycopod leafy shoots are re-examined. The leaf characters used in species characterisation include size (length and breadth), angle of departure from the stems and the overall shape (straight, curved or S-shaped). Sometimes leafy shoots can be directly related to known species of stems that are defined on their surface features of leaf cushions as in Lepidodendron, Lepidophloios and Ulodendron, or directly on the stem surface as in Bothrodendron. They are also assessed in terms of the determinate growth pattern of the plants. A key is given to identify the fossil-species of leafy shoots described here.
Original languageEnglish
Pages (from-to)466-494
Number of pages29
JournalBotany Letters
Volume169
Issue number4
DOIs
Publication statusPublished - 31 Jul 2022

Keywords

  • Bothrodendron
  • Leafy shoots
  • Lepidodendron
  • Lepidophloios
  • lycopods
  • Pennsylvanian
  • Ulodendron

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