The collection consists of photographic materials, correspondence, diaries, publications, and manuscripts by American botanist
and geologist Marcus E. Jones.
Marcus E. Jones (1852-1934) was a botanist who collected and described plants across the western United States and Mexico
during the late 19th and early 20th centuries. He was born in Ohio and attended Grinnell College (at the time Iowa College).
In the late 1870s, he made his first botanical collecting trips to the western United States and settled in Salt Lake City
in 1880 with his wife Anna Richardson, where they worked as teachers. Although he was not formally educated as a botanist,
he went on to describe over 900 plant taxa over the course of his career. He wrote numerous works on botany, mining, and other
subjects, including his self-published journal, Contributions to Western Botany, and Revision to the North American Species
of Astragalus (1923).
After the death of his wife in 1915, Jones sold his herbarium and library to Pomona College and moved to Claremont, California
in 1923, where he continued his travels and botanical work until his death in a car accident in 1934.