salix tristis(n = noun.plant) dwarf gray willow, dwarf grey willow, sage willow - willow shrub of dry places in the eastern United States having long narrow leaves canescent beneath;
is a kind of willow, willow tree
is a member of genus salix, salix

acridotheres tristis, anasa tristis, genus salix, salix, salix alba, salix alba caerulea, salix alba sericea, salix alba vitellina, salix amygdalina, salix amygdaloides, salix arctica, salix babylonica, salix blanda, salix candida, salix caprea, salix cinerea, salix discolor, salix fragilis, salix herbacea, salix humilis, salix lasiolepis, salix lucida, salix nigra, salix pendulina, salix pendulina blanda, salix pentandra, salix purpurea, salix pyrifolia, salix repens, salix sericea, salix sitchensis, salix triandra, salix uva-ursi, salix viminalis, salix vitellina, spinus tristis