Above: Winter Aconite in yard near the Duck Pond in Madison, Wisconsin (3/13/21).
Winter Aconite - Eranthis hyemalis
Winter Aconite is not native but it can naturalize under the the right conditions. A member of the buttercup family (Ranunculaceae) is one of the earliest bulbs to bloom in spring.
It grows 3-6″ tall.
Hyemalis: Latin for "winter-flowering".
Er: Greek for "Spring" and anthos: Greek for "flower" - so named for its early flowering
For more information on the Winter Aconite, visit Wikipedia.
Or, visit the UW-Madison Wisconsin Horticulture Division of Extension website page about Winter Aconite.
Above: Winter Aconite in yard near the Duck Pond on March 25, 2020
Above: Winter Aconite botanical illustration by William Curtis cira 1787.
Above: Winter Aconite 1907 botanical illustration by F. Edward Hulme.
Above: Winter Aconite 1905 botanical illustration.