Flora of the Pacific NorthwestThis manual is essentially a condensation of the five volume work, Vascular Plants of the Pacific Northwest, prepared by C. Leo Hitchcock, Arthur Cronquist, Marion Ownbey, and J. W. Thompson, and published serially from 1955 to 1969 by the University of Washington Press as volume 17 of the University of Washington Publications in Biology. The sequence of families is the same in the two works except for the transposition of the monocotyledons and