Salix alaxensis is a species of flowering plant in the willow family known by the common names Alaska willow and feltleaf willow. It is native to northern North America, where it occurs throughout northern Canada and Alaska. This plant is a shrub or tree up to 9 meters tall. The stem diameter is up to 18 centimeters. In harsher climates it remains much smaller. The smooth gray bark becomes furrowed and scaly with age. The leaves are up to 11 centimeters long and have woolly undersides.