American Pussy Willow, Salix discolor. Male catkins. This plant is found throughout much of Canada and the northern half of the US. It is grown as a garden plant outside of its native range. 2 other related European species (S. caprea and S. cinerea) and their hybrids are also known as pussy willows. Male and female catkins on different plants (dioecious); the male catkins mature yellow at pollen release. Photo Orange Co., NC