Guide Map of the Morton Arboretum

Nearly 5,000 plant species, 25 miles west of Chicago.

The Morton Arboretum was established in 1922 by Joy Morton (Morton Salt) on his personal estate about 25 miles west of Chicago, Illinois. A green thumb ran in the family, as Joy’s father, Sterling, was a former Secretary of Agriculture and central to the founding of Arbor Day in the United States.

This map, published in the mid-1940s, shows the arboretum at a period of significant growth and expansion. After Joy’s death in 1934, his daughter Jean became Chairman of the Board of Trustees and oversaw the hiring of May Watts, a prominent naturalist, to develop one of the first horticulture public education programs in the U.S. Furthermore, the recently completed Thornhill Building housed the growing library collection, a laboratory, and a lecture room with a capacity for 250 attendees.

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