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2:1
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Cordaites leaf in compression from the Carboniferous of West Virginia.
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2:2
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Cordaites leaf in transverse section, showing I-beam morphology. Carboniferous of Iowa.
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2:3
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Cordaianthus ovulate reproductive structure from the Carboniferous of West Virginia. Seeds are detached.
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2:4
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Cordaianthus williamsii fructification in longitudinal section. Carboniferous of England.
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2:5
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Cardiocarpus compression from the Carboniferous of Kansas.
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2:6
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Cardiocarpus permineralized seed in longitudinal section. Carboniferous of Iowa.
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2:7
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Mesoxylon iowense wood in tangential section.
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2:8
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Mesoxylon septate pith in longitudinal section.
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2:9
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Amyelon permineralized root in transverse section.
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