A tentative species identification today, as making a positive identification of a willow is usually a non-trivial matter involving a wide-ranging suite of characteristics. In this case, I have some close-up photographs that more clearly show the leaf shape (obovate), the not-glaucous nature of the branches, and what appear to be yellow buds against the reddish-branches. Combined with the habitat, the known species from the area, and the habit (a small shrub not forming a colony), and I reached the conclusion of Salix bebbiana--but I am entirely willing to be corrected! For more on willow identification, see A Guide to the Identification of Salix (willow) in Alberta (listed in the references).
Assuming the yellow-leaved plant in the photographs is Salix bebbiana, then this is a representative of a species native to much of North America north of Mexico, with the exception of the southeast USA. Bebb's willow or beak willow is also found in far eastern Russia and Siberia. Like the Betula glandulosa from a few days ago, this is an important browse species (though not this particular individual, given its precarious location).
There are somewhere in the vicinity of four hundred willow species, in addition to a number of naturally-occurring hybrids. The majority of these are native to the temperate and arctic northern hemisphere. Unfortunately, when a few species were introduced into Australia for erosion control, they eventually became invasive.