Manual of the Higher Plants of Oregon was an early flora of plants of Oregon written by Morton Peck.Morton Peck, Oregon Encyclopedia,
It was praised for its format, portability, phylogenetic keys, having new species recorded, and completeness of both descriptions of plants and physiographic provinces.Morton Peck, Oregon Encyclopedia, The second edition (1961) includes many changes to the first edition (1941) which, according to Peck, is "now decidedly out of date."
See also Flora of Oregon Flora (publication)
References