Synonyms for Sage Willow (same or very similar meaning)
WordNet sense 1 (willow shrub of dry places in the eastern United States having long narrow leaves canescent beneath):
dwarf grey willow, dwarf gray willow, Salix tristisWordNet sense 2 (North American shrub with whitish canescent leaves):
hoary willow, Salix candidaFrom the ODE community, based on WordNetadd/edit