It is listed as a threatened species in Minnesota, not so much because the species is currently threatened, but because there is only one population found on an east-facing bluff composed of sandstone that is capped with limestone. In other parts of its range it is found in woods, on talus-slopes, in rocky areas and walls, on wooded slopes and ravines, and at the edges of woods, streams and roads.
Minnesota lists the species as threatened because it has only one population living on a particular kind of habitat, an east-facing bluff composed of sandstone capped with limestone. This is different from other areas where the species can be found in various environments like forests and rocky areas.