A floriferous and vegetative bud in winter. Notice the sigmoidal
twist of the floriferous bud. The reddish shiny surface of
branchlets and buds is a good hint for rusty willow, whenever it is
present. The trouble is that the opposite is not true: sometimes even
when branchlets aren't reddish and glabrous, a willow might still be a
rusty willow or its hybrid.