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Williamsonia is an extinct tree of seed plants belonging to the cycadeoids (Bennettitales) bearing monosporangiate female (seed) cone associated with fern-like leaves of Ptilophyllum and male (pollen) cone of Weltrichia. The plant has been lived and discovered worldwide from Early Jurassic to Late Cretaceous.
## Keywords
Plantae Spermatophyta Cycadophyta
