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

Barry A. Thomas; Christopher J. Cleal

doi:10.1080/23818107.2022.2101517

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

Barry A. Thomas, Christopher J. Cleal

Department of Life Sciences

University of Bristol

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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 language	English
Pages (from-to)	466-494
Number of pages	29
Journal	Botany Letters
Volume	169
Issue number	4
DOIs	https://doi.org/10.1080/23818107.2022.2101517
Publication status	Published - 31 Jul 2022

Keywords

Bothrodendron
Leafy shoots
Lepidodendron
Lepidophloios
lycopods
Pennsylvanian
Ulodendron

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10.1080/23818107.2022.2101517Licence: CC BY-NC-ND

ArticleFinal published version, 17.1 MBLicence: CC BY-NC-ND

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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.",

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

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