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

Petrophyton cinerascens flower.
Petrophyton cinerascens, Chelan rockmat. Photo by Dana Visalli.

View of Petrophyton cinerascens growing from crevices on a rock face.
Chelan rockmat is a woody shrublet in the rose family, growing in rock crevices. Photo by Dana Visalli.

Chelan rockmat.
Petrophyton cinerascens, Chelan rockmat. Photo by John Gamon.

Petrophyton cinerascens range map.
Petrophyton cinerascens range map.

Petrophyton cinerascens, Chelan rockmat

  • Also known as: Petrophytum cinerascens

Threats

  • Quarrying of rock is the most significant present threat
  • Auto emissions, spray drift, and climate change are potential threats
  • Limited to cliffs along the Columbia River in central Washington; all the known occurrences are within a strip of land seventeen miles long and less than a half mile wide

Conservation Status

National Forest and Grassland Occurrence

More Information