Williamsoniaceae

Williamsoniaceae; Temporal range: Triassic–Cretaceous PreꞒ Ꞓ O S D C P T J K Pg N
	Restoration of Wielandiella
	Diagram of Weltrichia, a male reproductive structure
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Order:	†Bennettitales
Family:	†Williamsoniaceae; (Carruthers) Nathorst, 1913
Genera
	Zamites (leaf, in partim); Anomozamites (leaf); Ischnophyton; Kimuriella (whole plant); Pterophyllum (leaf); Otozamites (leaf); Wielandiella (whole plant); Williamsonia (female reproductive structure); Williamsoniella (bisexual reproductive structure); Weltrichia (male reproductive structure); Bucklandia (axes); Bennettistemon (male pollen organ); Vardekloeftia (female seed cone);

Williamsoniaceae is a family within the Bennettitales, an extinct group of seed plants within the Cycadophyta subdivision. Members of this family are believed to have been around two meters tall and with widely serrate leaves along a central stem. Reproductive organs of the Williamsoniaceae have varied widely in the fossil record but almost all have been found to be borne on stalks emerging from a ring of leaves.^[1]

^ Cite error: The named reference Meyen 1984 was invoked but never defined (see the help page).

[Meyen_1984-1] Cite error: The named reference Meyen 1984 was invoked but never defined (see the help page).

[1]

Williamsoniaceae Temporal range: Triassic–Cretaceous PreꞒ Ꞓ O S D C P T J K Pg N

Restoration of Wielandiella

Diagram of Weltrichia, a male reproductive structure
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Order:	†Bennettitales
Family:	†Williamsoniaceae (Carruthers) Nathorst, 1913
Genera
Zamites (leaf, in partim) Anomozamites (leaf) Ischnophyton Kimuriella (whole plant) Pterophyllum (leaf) Otozamites (leaf) Wielandiella (whole plant) Williamsonia (female reproductive structure) Williamsoniella (bisexual reproductive structure) Weltrichia (male reproductive structure) Bucklandia (axes) Bennettistemon (male pollen organ) Vardekloeftia (female seed cone)