This is the first comprehensive treatment of the pteridophyte flora of the large area comprising Oregon, Washington, British Columbia, the Yukon Territory, and Alaska to the Arctic Ocean.
This field guide to commonly seen cryptogams will provide a basis for understanding their vast diversity of taxa, speciation, edibility, relative abundance, and utility, as well as the ecological roles played by these organisms.
Macrolichens of the Pacific Northwest by 
Pacific Northwest Ferns and Their Allies by 
Some Common Mosses of B.C. by 
Common Interior Alaska Cryptogams by 