In spring and summer, Yellowstone National Park and the Rocky Mountains are filled with a profusion of plants and abundant colorful wildflowers--sunny Yellow Columbine, delicate Fairy Slipper, vibrant Indian Paintbrush, showy Cat's Ear Mariposa, and passionate Purple Prairie-Clover. These 20 postcards, perforated for easy use, celebrate the natural brilliance of the region's native flora.