Williamsonia

"Williamsonia is also a genus of corduliid dragonflies"

Taxobox
fossil_range = Cretaceous


image_caption = Fossil seed cone of "Williamsonia" from the Jurassic
image_width = 240px
regnum = Plantae
divisio = Spermatophyta
classis = Spermatopsida
ordo = Bennettitales †
familia = Williamsoniaceae
genus = "Williamsonia"

"Williamsonia" is a fossil genus of Bennettitales, an extinct group of seed plants. 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.