Caltha palustrisDescription: This plant has rounded, dark green leaves arising from a short stem. It has bright yellow flowers.Habitat and Distribution: This plant is found in bogs, lakes, and slow-moving streams. It is abundant in arctic and subarctic regions and in much of the eastern region of the northern United States.Edible Parts: All parts are edible if boiled.CAUTIONAs with all water plants, do not eat this plant raw. Raw water plants may carry dangerous organisms that are removed only by cooking.