seed fern: Quick Facts
Facts
| Also Known As | pteridosperm • Pteridospermophyta |
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Photos
Related Topics and References
Topics
DicroidiumGlossopterisPermian PeriodCarboniferous PeriodMesozoic EraextinctionplantgymnospermangiospermfernconifercycadophytelycophyteginkgophytemossEospermatopterisArchaefructusCycadeoidea