The itinerary, compiled in 1948, documents Koelz's plant explorations in Ceylon, India, Afghanistan, and Iran from 1936 to 1941.
Walter Norman Koelz (1895-1989), zoologist and botanist, was born in Waterloo, Michigan. He received an A.B. degree from Olivet College in 1915, and his A.M. and Ph.D.
degrees from the University of Michigan in 1917 and 1920, respectively. In 1919, Koelz held the position of Curator of Fishes at the Museum of Zoology at Michigan. From 1919
to 1927, and again in 1930, Koelz worked for the United States Bureau of Fisheries. From 1935 to 1941, and from 1947 to 1949, Koelz was a plant explorer for the United States
Department of Agriculture.