Salix Scouleriana, or more commonly know as Scouler's Willow, is a tree shrub with green foliage and yellow flowers of the genus Salix. It has a rapid growth rate and a height of 50 feet at maturity. Its duration is perennial which means it will grow year after year. It's active growth period is spring and summer, blooms during early spring, is somewhat tolerant of shade and is routinely available commercially. Salix Scouleriana or Scouler's Willow's floral region is North America US Lower 48 and Alaska, specifically in the states of Alaska, Arizona, California, Colorado, Idaho, Montana, New Mexico, Nevada, Oregon, South Dakota, Utah, Washington and Wyoming.