The disjunct mesic forests of the Pacific Northwest, occurring on the west side of North America's Coastal Ranges as well as in the Northern Rocky Mountains, have emerged as a model system for comparative phylogeography. Less well‐known, however, are the alpine and subalpine plants that mirror this distribution—here referred to as the Maritime Alpine Disjuncts. The phylogeographic histories of lowland coastal disjunct species...

The disjunct temperate rainforests of the Pacific Northwest of North America (PNW) are characterized by late‐successional dominant tree species Thuja plicata (western redcedar) and Tsuga heterophylla (western hemlock). The demographic histories of these species, along with the PNW rainforest ecosystem in its entirety, have been heavily impacted by geological and climatic changes the PNW has experienced over the last 5 million...