. Wild flowers and trees of Colorado. Botany. 22 WILD FLOWERS AND TREES OF COLORADO. Fig. 23.—Blue Columbine (Aquilegia coerulea) Everyone knows the Colorado state flower. It grows chiefly in the montane and sub-alpine zones. A yellow columbine occurs in southern Colorado and a red-and-yellow species on the western slope. (One-half natural size.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Ramaley, Francis, 1870-1942.