F. cascadensis was first described in 2012 by Kim E. Hummer of the USDA ARS National Clonal Germplasm Repository in Corvallis, Oregon.

The holotype plant was collected from a disturbed area along a road in Lane County Oregon.

The holotype plant was in a south facing area growing in association with Pseudotsuga menziesii.

F. cascadensis grows along the western slopes of the Oregon Cascades Mountains from the Columbia River south to Crater Lake, at elevations of about 3,000 feet up to tree line.

It grows in sandy-clay loam soil of volcanic origin located in forest clearings and open alpine meadows.