Synonyms for Pussy Willow (same or very similar meaning)
WordNet sense 1 (much-branched Old World willow having large catkins and relatively large broad leaves):
goat willow, florist's willow, Salix caprea
WordNet sense 2 (small willow of eastern North America having greyish leaves and silky catkins that come before the leaves):
Salix discolor
From the ODE community, based on WordNet
add/edit