pussy willow

any of several willows bearing velvetlike catkins before the leaves; esp., a deciduous shrub or tree (Salix discolor) with large, silvery catkins

See pussy willow in American Heritage Dictionary 4

noun
  1. A deciduous North American shrub or small tree (Salix discolor) having large silky catkins.
  2. Any of several willows similar to this plant.
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