page_title: Williamsonia (plant)
section_title: Biology
hierarchical_section_title: Williamsonia (plant) / Biology
caption_attribution_description: Italiano: Ricostruzione in scala 1:1.
context_page_description: Williamsonia is an extinct genus of plant belonging to Bennettitales, an order of seed plants which bore a resemblance to cycads. Fossilized specimens of Williamsonia have been discovered worldwide.
context_section_description: Williamsonia possessed a sturdy stem and had multiple fern-like leaves. The plant did not live in groups. The stamens of Williamsonia curved inward and upward.
  Williamsonia produced flowers up to 4 inches (10 cm) in length. Its stalked seeds would have grown from a central receptacle, and the entire flower of Williamsonia would have been surrounded by protective bracts (which are often the only part of the plant to undergo fossilization). The cones of Williamsonia were monosporangiate. They were "cup shaped" and could be up to 15 centimetres (5.9 in) in diameter. As many as 25-50 ovules could be present in each cone. The development of the ovules appears to be similar to that of Cycadeoidea.
caption: Williamsonia life restoration at MUSE - Science Museum in Trento
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