No one knows it. But, you need to be a competent palynologist, not a palynologist of the Yukon pollen flora. Organism identification is made by the characters of the specimen, not by range maps or habitat descriptions. To properly identify specimens, you need to use the proper literature - floras, keys, etc. Sometimes, the original literature needs to be consulted.
Biological identification comes with experience.
The more time you put into it, the better you will be. This is very important, and taxonomy must be taken seriously. You may be called upon to justify your identifications, by experts of the particular group. If this is not clear, please discuss this with me. Putting a name on a specimen is only the first step.