The Botanists at Crater Lake National Park by Elizabeth L. Horn

Horn of Purdue University was a seasonal naturalist in 1964 and 1965. Richard Brown encouraged her to study the Pumice Desert, a five square mile dry meadow in the northern portion of the Park. Horn spent lieu days (off-duty time) on the desert and many other seasonal employees assisted with field work. The study showed only 14 species of plants inhabited the area and covered less than 5% of the surface (Horn 1968). Subsequent monitoring showed that succession is slowly proceeding: in one plot, lodgepole pine numbers increased 75% over 35 years (Horn 2002).