Eranthis hyemalis, the winter aconite, is a species of flowering plant in the buttercup family Ranunculaceae, native to calcareous woodland habitats in France, Italy and the Balkans, and widely naturalized elsewhere in Europe.

[6] E. hyemalis[7] and the sterile hybrid cultivar 'Guinea Gold'[8] have gained the Royal Horticultural Society's Award of Garden Merit.

[9] All parts of the plant are poisonous when consumed by humans and other mammals,[10] because it contains cardiac glycosides similar to those present in Adonis vernalis.

Poisoning symptoms include colicky abdominal pains, nausea, vomiting, diarrhoea, disturbed vision, dyspnea, bradycardia, and, in severe cases, cardiac arrest.

[11] Specific cardiac glycosides present in E.hyemalis include Eranthin A and B, belonging to the bufadienolide group,[12] also found in (and named for) the toad venom bufotoxin.