Early Devonian Euphyllophytes -- Psilophyton and Pertica |
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1:1 | Psilophyton ornata compressed fertile axes from the Devonian (Emsian) of Quebec, Canada. | |
1:2 | Pertica compressed fertile axes from the Devonian (Emsian) of Quebec, Canada. | |
Progymnosperms |
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1:3 | Tetraxylopteris schmidtii compressed axes from the Devonian, New York. | |
1:4 | Archaeopteris gaspensis from the Devonian of Canada. | |
1:5 |
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Callixylon permineralized wood; radial section. |
1:6 | Callixylon permineralized wood; tangential section. | |
1:7 | Callixylon permineralized trunk. | |
Early Seed Plants -- Lyginopteris |
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1:8 | Lyginopteris permineralized stem in transverse section. | |
1:9 | Sphenopteris foliage from the Carboniferous of Holland. | |
1:10 | Lagenostoma permieralized ovule from the Carboniferous of Holland. | |
1:11 | Gnetopsis compressed seeds from the Carboniferous of Virginia. |