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Williamsonia is a genus of plant belonging to Bennettitales, an extinct order of seed plants. Within the form classification system used in paleobotany, Williamsonia is used to refer to female seed cones, which are associated with plants that also bore the male flower-like reproductive structure Weltrichia.
Fossils of Williamsonia are known spanning from the Early and Middle Triassic to Late Cretaceous, and have been found worldwide, including in Europe, Australia, North America, East Asia India and South America.
Text excerpted from the Wikipedia article Williamsonia (plant) by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
