Forrest Shreve on "Sky Island" Vegetation

Sources: Bowers, Janice E., 1988, A Sense of Place: the Life and Work of Forrest Shreve, Tucson: University of Arizona Press

When Forrest Shreve first ascended the Santa Catalina Mountains in July 1908, he and his companions had to ride on horseback from the mountain base at around 3,000 feet elevation to a Mount Lemmon summit just over 9,100 feet. During that ascent, he observed "a continually shifting panorama of vegetation", and