ACONITE

Eranthis (Winter Aconite) is a part of the Buttercup family, native to southern Europe and east across Asia to Japan.
They are herbaceous perennial plants. The yellow flowers are among the first to appear in Spring, as early as January. The leaves only expand fully when the flowers are nearly finished.
All parts of the plants are poisonous. In Greek and Roman mythology, Medea tried to kill Theseus by poisoning him by putting aconite in his wine.