Back Williamsonia (planta) Spanish Williamsonia Finnish Williamsonia (genre végétal) French Williamsonia (tumbuhan) ID Williamsonia (botanica) Italian Williamsonia (plant) Dutch Williamsonia (planta) Portuguese 威氏蘇鐵屬 Chinese
| Williamsonia Temporal range:
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| Williamsonia fossil (CNU 39), National Museum of Natural History | |
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Order: | †Bennettitales |
| Family: | †Williamsoniaceae |
| Genus: | †Williamsonia Carruth., 1870[1] |
| Type species | |
| Williamsonia gigas Carruth., 1870[1]
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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.[2]
- ^ a b Seward, A. C. (2011). Fossil Plants: A Text-Book for Students of Botany and Geology. Cambridge, New York: Cambridge University Press. p. 421. ISBN 978-1-108-01597-4. Retrieved February 7, 2012.
- ^ Stockey, Ruth A.; Rothwell, Gar W. (March 2003). "Anatomically Preserved Williamsonia (Williamsoniaceae): Evidence for Bennettitalean Reproduction in the Late Cretaceous of Western North America". International Journal of Plant Sciences. 164 (2): 251–262. doi:10.1086/346166. ISSN 1058-5893. S2CID 84997693.