Calochortus umpquaensis is only found along in the Umpqua River watershed of southwestern Oregon, and within this narrow range, it is restricted to serpentine-derived soils that are especially high in nickel, cadmium, magnesium, and phosphorus. Photo by Eric Baxter.
Mariposa is the Spanish word for butterfly. You can see why this plant is called mariposa lily! Photo by Richard Helliwell.
Umpqua mariposa lily grows in forests and meadows, especially where the two habitats meet. Photo by Richard Helliwell.
Calochortus umpquaensis range map.