Williamsonia

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Williamsonia is also a genus of corduliid dragonflies

Williamsonia is a fossil genus of Bennettitales, an extinct group of seed plants in the anthophyte clade. The plants looked a bit like a cycad, with slender trunks up to two meters tall topped with a crown of leaves.

The genus is used for fossil cones containing ovules, from which seeds would have later developed. The cones are round and include up to 50 seeds packed in among the cone scales.