Pussy willow

Pussy willow is a name given to many of the smaller species of the genus Salix (willows and sallows) when their furry catkins are young in early spring. Before the male catkins of these species come into full flower they are covered in fine, greyish fur, leading to a fancied likeness to tiny cats, also known as "pussies". The catkins appear long before the sallow leaves, and are one of the earliest signs of spring.