NatureServe Conservation Status
Rounded Global Status Rank: G3 - Vulnerable
Reasons: Expected to occur in the higher mountains of eastern North America; Finland (Crum et al. 1981). Wales, N. England and Scotland, showing a distinct eastern tendency, very rare; circumpolar, slightly continental (Smith 1978). Found in ditches and depressions in ombrotrophic bogs (Smith 1978).