Another species, called the goat willow, is known for its woolly flower clusters, or catkins, which sprout before the leaves are formed.
Savukārt blīgzna jeb pūpolvītols ir pazīstams ar savām pūkainajām ziedkopām jeb pūpoliem, kas pārklāj to zarus, pirms sākušas plaukt lapas.