Caltha palustris Linnaeus 

Caltha leptosepala de Candolle 

Caltha natans Pallas 

List of plants of the Manitoulin Islands, Lake Huron 

Key to plants of the farming and ranching areas of the Canadian prairies, A 

Old Indian trails: incidents of camp and trail life, covering two years' exploration through the Rocky Mountains of Canada 

Place Names of Alberta. Volume IV. Northern Alberta