Photograph of a specimen of Mariposa lily, ca.1920. Five blossoms are shown at the end of delicate stems, among assorted buds. The top of what appears to be a glass vase can be seen at the lower edge of the image. The background behind is dark. Photoprint identifies their color as "light purple".; "This group consists of about 60, perennial bulbs, native to the western United States. These plants are commonly known as Butterfly Lilies, Fairy Lanterns, Globe Tulips, Mariposa Lilies, Sego Lilies, and Star Tulips. Of all the species of Calochortus, Mariposa Lilies are the most attractive. The large, 3- to 4-inch, cup-shaped flowers are produced atop erect stems, 12 to 15 inches high, over a period of several weeks in late spring and early summer. The colorful, delicate blossoms consist of three, fan-shaped petals, which curve back slightly at the edges. They are marked and feathered in contrasting colors. C. albus (Fairy Lantern) has white flowers, which are sometimes stained with rose. C. luteus (Yellow Mariposa) has yellow flowers lined and speckled with rust toward the center. C. venustus (White Mariposa) may have white, yellow, red, or purple petals marked with a dark red splotch toward the center. (This variety is hardy only to zone 6) These plants are suitable for growing in containers, dry meadows, and as cut flowers." -- unknown author.