From July 4 to July 16, 1915, the writer was stationed at Umatilla, Oregon, as special field agent of the United States Biological Survey. A part of the work assigned was the gathering of data in regard to the general character of the vegetation and the listing of the species identified. Most of the facts here given were embodied in a somewhat briefer form in the official report.
Proceedings of the Iowa Academy of Science
©1916 Iowa Academy of Science, Inc.
Peck, Morton E.
"A Section of Upper Sonoran Flora in Northern Oregon,"
Proceedings of the Iowa Academy of Science, 23(1), 317-334.
Available at: https://scholarworks.uni.edu/pias/vol23/iss1/52