In a nearby yard there appears to be a patch of hybrid Helleborus.
plant forming part of ranunculaceae, for more information see my blog http://biziowild.altervista.org/helleborus-foetidus/
a few in flower next to fresh snow patches
Helleborus foetidus, known variously as stinking hellebore /ˈhɛlɪbɔːr/, dungwort, and bear's foot, is a species of flowering plant in the buttercup family Ranunculaceae, native to the mountainous regions of Central and Southern Europe, Greece and Asia Minor. It is found wild in many parts of England, especially on limestone soil.