About Cascadia nuttallii (Small) A.M.Johnson
Cascadia nuttallii (Small) A.M.Johnson is a species of flowering plant that belongs to the saxifrage family, Saxifragaceae. It is the only species that makes up the entire genus Cascadia. This plant is an annual herb that is native to the western United States. Its geographic range stretches from southwestern Washington, through Oregon, to northwestern California. Within California, the species is restricted only to the Klamath Ranges, and its range extends north through the mountains of western Oregon all the way to southwestern Washington. Cascadia nuttallii is a trailing, herbaceous annual, with stems that grow between 5 and 25 centimeters long. It grows from a rhizome. This plant can be found growing on wet, shaded cliffs and ledges, and it generally grows at elevations above 700 meters.