[Metro-One]

I don’t think you guys know how to read such maps.

There are thousands of tree species in North America. Some are found in numerous forest zones, others are found only in a small part of a single zone.

These are generalized zones that can be further subdivided.

Example, the Montane zone in BC.

This zone is generally defined as having hot to mild summers and realively low precipitation, bounded by the drier / hotter grasslands on one side, and cooler and or moister zones on the other.

Within this zone they mention Lodgepole Pines, Douglas Firs, and Ponderosa Pines as the dominant species.

Now follow me here, this is where things get tricky.

In the hottest / driest regions of this zone Ponderosa Pines are plentiful, Douglas Firs are sparse, and Lodgepole Pines are absent.

In the mild areas Douglas Fir is plentiful and both Ponderosa Pines and Lodgepole Pines are sparse.

In the coolest / wettest regions of this zone Lodgepole Pines are abundant, Douglas Firs are sparse, and Ponderosa Pines are absent.

Point being, on such generalized zones often used for nation / continental wide maps you will have tree species listed that are not within your area.

This even occurs on such maps with higher zonal resolutions.

The Pacific Rainforest also has numerous species that change as one goes south to north, but the climatic aspects and function of the ecosystem are generally the same.