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Sixteen specimens of known heights from a Lepidodendron trunk, about 3 4 5 m long. are described in detail. The surface features show upward change from fissured bark to well defined leaf cushions. These features are discussed in relation to growth patterns in arborescent lycopods.

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Conifer fragments from the Lower Cretaceous of Sudan are preserved as internal and external silica moulds. Low viscosity silicone rubber has been used to prepare casts showing fine epidermal details which enable identification of the plants. One is I'seudofrenelopsis parceramosa (Fontaine) Watson, the other is described as a new species of Frenelopsis Schenk.