Williamsonia (plant)

Williamsonia; Temporal range:
	Cross section of Williamsonia harrisiana (India, Jurassic - Early Cretaceous)
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Order:	†Bennettitales
Family:	†Williamsoniaceae
Genus:	†Williamsonia; Carruth., 1870
Type species
	Williamsonia gigas; Carruth., 1870

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.

[fp-1] 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.

[:0-2] 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.

[1]

[2]

Williamsonia Temporal range:

Cross section of Williamsonia harrisiana (India, Jurassic - Early Cretaceous)
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Order:	†Bennettitales
Family:	†Williamsoniaceae
Genus:	†Williamsonia Carruth., 1870^[1]
Type species
Williamsonia gigas Carruth., 1870^[1]