1.  silky willow(n = noun.plant) salix sitchensis, sitka willow - small shrubby tree of western North America (Alaska to Oregon);
is a kind of willow, willow tree
is a member of genus salix, salix

2.  silky willow(n = noun.plant) salix alba sericea, salix sericea, silver willow - North American willow with greyish silky pubescent leaves that usually blacken in drying;
is a kind of willow, willow tree
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 willow, red willow, red-flowered silky oak, sage willow, sea willow, shining willow, silky, silky anteater, silky cornel, silky dogwood, silky elm, silky oak, silky pocket mouse, silky tamarin, silky terrier, silky wisteria, silver willow, sitka willow, snap willow, swamp willow, sydney silky, water willow, weeping willow, white willow, willow, willow aster, willow bell, willow family, willow oak, willow tree, wisconsin weeping willow