Cascadia nuttallii

{{Short description|Species of flowering plant}}

{{Speciesbox

| genus = Cascadia

| image = Nuttall's Saxifrage, Del Norte County, US-CA, US imported from iNaturalist photo 134751379.jpg

| parent_authority = A.M.Johnson (1927)

| species = nuttallii

| authority = (Small) A.M.Johnson (1927)

| synonyms = *Saxifraga elegans {{small|Nutt. (1840), nom. illeg.}}

• Saxifraga nuttallii {{small|Small (1896)}}
• Saxifraga nuttallii var. macrophylla {{small|Engl. & Irmsch. (1916)}}
• Saxifraga nuttallii var. typica {{small|Engl. & Irmsch. (1916)}}

| synonyms_ref = [https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:47929-2 Cascadia nuttallii (Small) A.M.Johnson]. Plants of the World Online. Retrieved 11 April 2024.

}}

Cascadia nuttallii is a species of flowering plant in the saxifrage family, Saxifragaceae. It is the sole species in genus Cascadia. It is an annual native to the western United States, ranging from southwestern Washington through Oregon to northwestern California.

It is a trailing herbaceous annual with stems 5 to 25 cm long. It grows from a rhizome.Michael S. Park & Patrick E. Elvander 2012. [https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=91953 Cascadia nuttallii]. Jepson eFlora. Retrieved 11 April 2024.

It grows on wet shaded cliffs and ledges, generally above 700 meters elevation. In California it is limited to the Klamath Ranges, and its range extends northwards through the mountains of western Oregon to southwestern Washington.