Critically Imperiled Plant Profile (Not Listed or Proposed under the Endangered Species Act)
Petrophyton cinerascens, Chelan rockmat. Photo by Dana Visalli.
Chelan rockmat is a woody shrublet in the rose family, growing in rock crevices. Photo by Dana Visalli.
Petrophyton cinerascens, Chelan rockmat. Photo by John Gamon.
Petrophyton cinerascens range map.
Petrophyton cinerascens, Chelan rockmat
- Also known as: Petrophytum cinerascens
- 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
National Forest and Grassland Occurrence