Drosera rotundifolia.

Botanical name: 

Drosera rotundifolia Linn. Droseraceae. Lustwort. Sundew.

Northern regions. The round-leaved sundew is said by Figuer to be acrid and caustic, and in Italy a liquor called rossoli is distilled from its juices. It curdles milk.

Sturtevant's Edible Plants of the World, 1919, was edited by U. P. Hedrick.