This 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 dicotyledons; the dicotyledons are in the traditional Englerian sequence, and the monocotyledons are arranged according to the system of Cronquist as presented in “The Evolution and Classification of Flowering Plants.” The genera within each family in this manual are alphabetically arranged, as in the earlier work, but for convenience in presentation it has bee necessary to number the species.
How they fitted 20% more species without greatly increasing the size of the book, I do not know... The drawings are a tiny bit larger than in the original edition, but blurrier. Fantastic work: I hope the multi-volume flora gets updated too!
It is very well organized, and loaded with high-quality line drawings (the drawings alone make the book worth having). The binding is strong, and the typesetting clear. It's a bit larger and heavier than many "field guides", but it's still totally fine to throw in your pack with you.
Easily one of the best plant guides I've ever seen for the Northwest.
Best regional flora I've ever seen. Still the best for our region, in spite of the fact that nomenclature has moved on without it. One of only two books I've had to have re-bound.