Coefficient of Conservatism:
Coefficient of Wetness:
Bogs, acid swamp forests, shrub swamps, margins of fens, usually in sandy or peaty, acidic soils; often on hummocks in very wet sites, but less commonly in deep shade.
A common, distinctive, and showy fern, recent research by Metzgar et al. (2008) supports recognition as the monotypic genus Osmundastrum.