1.  pussy willow(n = noun.plant) salix discolor - small willow of eastern North America having greyish leaves and silky catkins that come before the leaves;
is a kind of willow, willow tree
is a member of genus salix, salix

2.  pussy willow(n = noun.plant) florist's willow, goat willow, salix caprea - much-branched Old World willow having large catkins and relatively large broad leaves;
is a kind of sallow
is a member of genus salix, salix

almond willow, almond-leaves willow, arctic willow, arroyo willow, babylonian weeping willow, balsam willow, basket willow, bay willow, bearberry willow, black willow, brittle willow, bush willow, crack willow, creeping willow, cricket-bat willow, desert willow, dwarf gray willow, dwarf grey willow, dwarf willow, florist's willow, goat willow, golden willow, gray willow, grey willow, hemp willow, hoary willow, huntingdon willow, laurel willow, peach-leaved willow, peachleaf willow, prairie willow, purple willow, pussy, red willow, sage willow, sea willow, shining willow, silky willow, silver willow, sitka willow, snap willow, swamp willow, water willow, weeping willow, white willow, willow, willow aster, willow bell, willow family, willow oak, willow tree, wisconsin weeping willow, wood pussy