That's Lemmon with two M's!
In 1880, on Thanksgiving Day, Sara Allen Plummer, the woman for whom Mount Lemmon was named in 1881, married fellow botanist John Gill Lemmon. Sara, a courageous woman, had journeyed west alone for health reasons and blossomed into a self-taught botanist and gifted artist. Together they discovered new plant species, and Sara’s detailed illustrations carried their findings far beyond the desert, delighting scientists and audiences wherever she presented her works and exhibits.
Life stories: Mt. Lemmon’s namesake was female explorer, by Kimberly Matas Arizona Daily Star, Updated
Sara Plummer Lemmon: Pioneering Botanist, by Erin Blakemore, JSTOR Daily, March 11, 2015
Gertrude Pusch in Bonnet on Ladder on Lemmon Rock Lookout Tower
Man with Two Women on Horseback in front of Lemmon Rock Lookout Tower by Hank Soldier’s Camp. Gertrude Pusch is on the horse to the right.