In 1938, Clover and Jotter conducted a harrowing 43-day trip down the Colorado River in an effort to map the Grand Canyon’s flora. They succeeded, despite rampant sexism and numerous physical ...

Botanical study of the Grand Canyon by Elsie Clover and Lois Jotter, the first two women on the first commercial trip down the Colorado River, 1938. Credit: Lois Jotter Cutter Collection/NAU.PH.

“Thanks for weeding Grand Canyon,” he said. I didn’t know how to reply. I had joined the trip to research the story of two University of Michigan scientists, Elzada Clover and Lois Jotter, who took ...

Elzada Clover and Lois Jotter ... sign up for a river trip. And of course, the Grand Canyon and Cataract Canyon and, to a lesser extent, Glen Canyon [all situated along the Colorado River] were ...

Jotter and her mentor, University of Michigan botany professor Elzada Clover, set out in ... A Naturalist Explores the Colorado River through the Grand Canyon by Ann Zwinger (University of Arizona ...

And yet, the Grand Canyon remains yoked to the present in one key respect. The Colorado River, whose wild energy incised the canyon over millions of years, is in crisis. As the planet warms ...