aka Varialble Willow, Salix barclayi var. commutata. The common name denotes that both sides of the leaves are green. The shrub grows to six feet in height and is one of the latest flowering willows. The flowers are tightly packed into upright cylindric clusters known as ‘catkins.’ It is the most common of the subalpine willows in the park and can be found in moist places often forming large tickets (i.e. Berkeley Park).