Concolor or white fir (Abies concolor) is very slow-growing for the first 30 years of its long life. It ultimately can reach over 100 feet. It needs regular irrigation in the drier summer months.

Ouray’s amphitheater is formed by walls of rich red sandstone draped with the deep green of several species of conifers, but now, the magnificent amphitheater is sullied with the red of dying white ...