Vascular Plants of the Pacific Northwest, Five Volume Set
Seattle, WA, Washington University Press, 1969, first editions. Very good+, very good+ d.js. Hardcover, five large heavy 4tos, about 700-900pp each.
Part 1: Vascular Cryptogams, Gymnosperms, and Monocotyledons. Part 2. Salicaceae to Saxifragaceae. Park 3: Saxifragaceae to Ericaceae. Part 4: Ericaceae through Campanulacea. Part 5: Compositae. Taxonomies and wonderful illustrations. (All books look pretty much the same as the attached photo.)