Williamsoniaceae

Williamsoniaceae; Temporal range:
	Restoration of Wielandiella
	Diagram of Weltrichia, a male reproductive structure
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Order:	†Bennettitales
Family:	†Williamsoniaceae; (Carruthers) Nathorst, 1913
Genera
Axis Taxa
	Bucklandia (stem); "Sahnioxylon" (wood);
Foliage Taxa
	Anomozamites (leaf); "Coreanophyllum" (leaf); Cycadolepis (bract); Dictyozamites (leaf); Eoginkgoites (leaf); Moltenia (leaf); Nilssoniopteris (leaf); "Nipponoptilophyllum" (leaf); Otozamites (leaf); Pterophyllum (leaf); Ptilophyllum (leaf); Zamites (leaf);
Reproductive Structure Taxa
	Ovule-bearing Structures: Bennetticarpus; Bennettitolepis; Fredlindia; Monosporangiate/Ovulate Cones: Vardekloeftia; Wielandiella; Williamsonia; Bisporangiate/Bisexual Cones: Amarjolia; Bennetticarpus; Williamsoniella; Seeds: Bysmatospermum; Pollen Organs: Haitingeria; Leguminanthus; Wonnacottia; Pollen Cones: Bennettistemon; Ontheanthus; Welsbergia; Weltrichia; Williamsonianthus; Wonnacottia; Pollen: Bennettitaepollenites; Bennettiteaepollenites;
Whole-plant Taxa
	Ischnophyton; Kimuriella; Monanthesia; Ohaniella; Pterophyllum; Wielandiella; Williamsoniella coronata;

Williamsoniaceae is a family within the Bennettitales, an extinct group of seed plants. 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.