Synonyms for Winter Mushroom (same or very similar meaning)
WordNet sense 1 (an edible agaric that is available in early spring or late fall when few other mushrooms are; has a viscid smooth orange to brown cap and a velvety stalk that turns black in maturity and pallid gills; often occur in clusters):
Flammulina velutipesFrom the ODE community, based on WordNetadd/edit