Like with elms and crabapples leaves and fruits may be needed in addition to the flowers in order to puzzle out unfamiliar kinds of willows.

The leaves on the ground were the only ones available. I have no idea there is such a thing as willow fruit.

Salix arctica?

Thank you very much, peren.all, for enabling me.

https://en.wikipedia.org/wiki/Salix_arctica it is. Absolutely.

So glad I was able to help!