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U.S. Forest Service

Critically Imperiled Plant Profile (Not Listed or Proposed under the Endangered Species Act)

Umpqua mariposa lily. 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.

Umpqua mariposa lily flower. Mariposa is the Spanish word for butterfly. You can see why this plant is called mariposa lily! Photo by Richard Helliwell.

Umpqua mariposa lily habitat. Umpqua mariposa lily grows in forests and meadows, especially where the two habitats meet. Photo by Richard Helliwell.

Calochortus umpquaensis range map. Calochortus umpquaensis range map.

Calochortus umpquaensis, Umpqua mariposa lily


  • Habitat is affected by grazing and mining

Conservation Status

National Forest and Grassland Occurrence

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