PLATE 11 



A. Normal Cam/. /inula rotundifolia at 8,300 feet, and alpine ecad at 14,100 feet, Pike's 



Peak, Colorado. 



B. Shade ecad and normal Gentiana amarella at 8,300 feel and alpine ecad a1 1.3,000 feet, 



Pike's Peak. 



C. Alpine ecad, normal form and shade ecad of Androsace septentrionalis, Pike's Peak. 



