Salix myrtilloides, the swamp willow, is a willow native to boglands in cool temperate to subarctic regions of northeastern Europe and northern Asia from central Norway and Poland eastwards to the Pacific Ocean coasts, with isolated populations further south in mountain bogs in the Alps, Carpathians and Sikhote-Alin mountains. (Wikipedia)

Salix fuscescens is a species of flowering plant in the willow family known by the common name Alaska bog willow. It is native to northern North America, where it occurs throughout much of Alaska and across northern Canada. It is also present in Eurasia. (Wikipedia)